* [PATCH v3 01/21] ARM: tegra: irq: nuke leftovers from non-DT support
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 02/21] irqchip: tegra: add DT-based support for legacy interrupt controller Marc Zyngier
` (19 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
The GIC is now always initialized from DT on tegra, and there is
no point in keeping non-DT init code.
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/mach-tegra/irq.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index ab95f53..7f87a50 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -283,13 +283,5 @@ void __init tegra_init_irq(void)
gic_arch_extn.irq_set_wake = tegra_set_wake;
gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND;
- /*
- * Check if there is a devicetree present, since the GIC will be
- * initialized elsewhere under DT.
- */
- if (!of_have_populated_dt())
- gic_init(0, 29, distbase,
- IO_ADDRESS(TEGRA_ARM_PERIF_BASE + 0x100));
-
tegra114_gic_cpu_pm_registration();
}
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 02/21] irqchip: tegra: add DT-based support for legacy interrupt controller
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 01/21] ARM: tegra: irq: nuke leftovers from non-DT support Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 03/21] ARM: tegra: skip gic_arch_extn setup if DT has a LIC node Marc Zyngier
` (18 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Tegra's LIC (Legacy Interrupt Controller) has been so far only
supported as a weird extension of the GIC, which is not exactly
pretty.
The stacked IRQ domain framework fits this pretty well, and allows
the LIC code to be turned into a standalone irqchip. In the process,
make the driver DT aware, something that was sorely missing from
the mach-tegra implementation.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-tegra.c | 368 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 369 insertions(+)
create mode 100644 drivers/irqchip/irq-tegra.c
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index 9516a32..59f34be 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_ARCH_HIP04) += irq-hip04.o
obj-$(CONFIG_ARCH_MMP) += irq-mmp.o
obj-$(CONFIG_ARCH_MVEBU) += irq-armada-370-xp.o
obj-$(CONFIG_ARCH_MXS) += irq-mxs.o
+obj-$(CONFIG_ARCH_TEGRA) += irq-tegra.o
obj-$(CONFIG_ARCH_S3C24XX) += irq-s3c24xx.o
obj-$(CONFIG_DW_APB_ICTL) += irq-dw-apb-ictl.o
obj-$(CONFIG_METAG) += irq-metag-ext.o
diff --git a/drivers/irqchip/irq-tegra.c b/drivers/irqchip/irq-tegra.c
new file mode 100644
index 0000000..e1ac65e
--- /dev/null
+++ b/drivers/irqchip/irq-tegra.c
@@ -0,0 +1,368 @@
+/*
+ * Driver code for Tegra's Legacy Interrupt Controller
+ *
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * Heavily based on the original arch/arm/mach-tegra/irq.c code:
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Author:
+ * Colin Cross <ccross@android.com>
+ *
+ * Copyright (C) 2010,2013, NVIDIA Corporation
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+#include <linux/syscore_ops.h>
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+#include "irqchip.h"
+
+#define ICTLR_CPU_IEP_VFIQ 0x08
+#define ICTLR_CPU_IEP_FIR 0x14
+#define ICTLR_CPU_IEP_FIR_SET 0x18
+#define ICTLR_CPU_IEP_FIR_CLR 0x1c
+
+#define ICTLR_CPU_IER 0x20
+#define ICTLR_CPU_IER_SET 0x24
+#define ICTLR_CPU_IER_CLR 0x28
+#define ICTLR_CPU_IEP_CLASS 0x2C
+
+#define ICTLR_COP_IER 0x30
+#define ICTLR_COP_IER_SET 0x34
+#define ICTLR_COP_IER_CLR 0x38
+#define ICTLR_COP_IEP_CLASS 0x3c
+
+#define TEGRA_MAX_NUM_ICTLRS 5
+
+static unsigned int num_ictlrs;
+
+struct tegra_ictlr_soc {
+ unsigned int num_ictlrs;
+};
+
+static const struct tegra_ictlr_soc tegra20_ictlr_soc = {
+ .num_ictlrs = 4,
+};
+
+static const struct tegra_ictlr_soc tegra30_ictlr_soc = {
+ .num_ictlrs = 5,
+};
+
+static const struct of_device_id ictlr_matches[] = {
+ { .compatible = "nvidia,tegra30-ictlr", .data = &tegra30_ictlr_soc },
+ { .compatible = "nvidia,tegra20-ictlr", .data = &tegra20_ictlr_soc },
+ { }
+};
+
+struct tegra_ictlr_info {
+ void __iomem *base[TEGRA_MAX_NUM_ICTLRS];
+#ifdef CONFIG_PM_SLEEP
+ u32 cop_ier[TEGRA_MAX_NUM_ICTLRS];
+ u32 cop_iep[TEGRA_MAX_NUM_ICTLRS];
+ u32 cpu_ier[TEGRA_MAX_NUM_ICTLRS];
+ u32 cpu_iep[TEGRA_MAX_NUM_ICTLRS];
+
+ u32 ictlr_wake_mask[TEGRA_MAX_NUM_ICTLRS];
+#endif
+};
+
+static struct tegra_ictlr_info *lic;
+
+static inline void tegra_ictlr_write_mask(struct irq_data *d, unsigned long reg)
+{
+ void __iomem *base = d->chip_data;
+ u32 mask;
+
+ mask = BIT(d->hwirq % 32);
+ writel_relaxed(mask, base + reg);
+}
+
+static void tegra_mask(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IER_CLR);
+ irq_chip_mask_parent(d);
+}
+
+static void tegra_unmask(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IER_SET);
+ irq_chip_unmask_parent(d);
+}
+
+static void tegra_eoi(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IEP_FIR_CLR);
+ irq_chip_eoi_parent(d);
+}
+
+static int tegra_retrigger(struct irq_data *d)
+{
+ tegra_ictlr_write_mask(d, ICTLR_CPU_IEP_FIR_SET);
+ return irq_chip_retrigger_hierarchy(d);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int tegra_set_wake(struct irq_data *d, unsigned int enable)
+{
+ u32 irq = d->hwirq;
+ u32 index, mask;
+
+ index = (irq / 32);
+ mask = BIT(irq % 32);
+ if (enable)
+ lic->ictlr_wake_mask[index] |= mask;
+ else
+ lic->ictlr_wake_mask[index] &= ~mask;
+
+ /*
+ * Do *not* call into the parent, as the GIC doesn't have any
+ * wake-up facility...
+ */
+ return 0;
+}
+
+static int tegra_ictlr_suspend(void)
+{
+ unsigned long flags;
+ unsigned int i;
+
+ local_irq_save(flags);
+ for (i = 0; i < num_ictlrs; i++) {
+ void __iomem *ictlr = lic->base[i];
+
+ /* Save interrupt state */
+ lic->cpu_ier[i] = readl_relaxed(ictlr + ICTLR_CPU_IER);
+ lic->cpu_iep[i] = readl_relaxed(ictlr + ICTLR_CPU_IEP_CLASS);
+ lic->cop_ier[i] = readl_relaxed(ictlr + ICTLR_COP_IER);
+ lic->cop_iep[i] = readl_relaxed(ictlr + ICTLR_COP_IEP_CLASS);
+
+ /* Disable COP interrupts */
+ writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+
+ /* Disable CPU interrupts */
+ writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+
+ /* Enable the wakeup sources of ictlr */
+ writel_relaxed(lic->ictlr_wake_mask[i], ictlr + ICTLR_CPU_IER_SET);
+ }
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+static void tegra_ictlr_resume(void)
+{
+ unsigned long flags;
+ unsigned int i;
+
+ local_irq_save(flags);
+ for (i = 0; i < num_ictlrs; i++) {
+ void __iomem *ictlr = lic->base[i];
+
+ writel_relaxed(lic->cpu_iep[i],
+ ictlr + ICTLR_CPU_IEP_CLASS);
+ writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
+ writel_relaxed(lic->cpu_ier[i],
+ ictlr + ICTLR_CPU_IER_SET);
+ writel_relaxed(lic->cop_iep[i],
+ ictlr + ICTLR_COP_IEP_CLASS);
+ writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
+ writel_relaxed(lic->cop_ier[i],
+ ictlr + ICTLR_COP_IER_SET);
+ }
+ local_irq_restore(flags);
+}
+
+static struct syscore_ops tegra_ictlr_syscore_ops = {
+ .suspend = tegra_ictlr_suspend,
+ .resume = tegra_ictlr_resume,
+};
+
+static void tegra_ictlr_syscore_init(void)
+{
+ register_syscore_ops(&tegra_ictlr_syscore_ops);
+}
+#else
+#define tegra_set_wake NULL
+static inline void tegra_ictlr_syscore_init(void) {}
+#endif
+
+static struct irq_chip tegra_ictlr_chip = {
+ .name = "LIC",
+ .irq_eoi = tegra_eoi,
+ .irq_mask = tegra_mask,
+ .irq_unmask = tegra_unmask,
+ .irq_retrigger = tegra_retrigger,
+ .irq_set_wake = tegra_set_wake,
+ .flags = IRQCHIP_MASK_ON_SUSPEND,
+};
+
+static int tegra_ictlr_domain_xlate(struct irq_domain *domain,
+ struct device_node *controller,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (domain->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != GIC_SPI)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
+ return 0;
+}
+
+static int tegra_ictlr_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct of_phandle_args *args = data;
+ struct of_phandle_args parent_args;
+ struct tegra_ictlr_info *info = domain->host_data;
+ irq_hw_number_t hwirq;
+ unsigned int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != GIC_SPI)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+ if (hwirq >= (num_ictlrs * 32))
+ return -EINVAL;
+
+ for (i = 0; i < nr_irqs; i++) {
+ int ictlr = (hwirq + i) / 32;
+
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &tegra_ictlr_chip,
+ &info->base[ictlr]);
+ }
+
+ parent_args = *args;
+ parent_args.np = domain->parent->of_node;
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args);
+}
+
+static void tegra_ictlr_domain_free(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs)
+{
+ unsigned int i;
+
+ for (i = 0; i < nr_irqs; i++) {
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
+ irq_domain_reset_irq_data(d);
+ }
+}
+
+static const struct irq_domain_ops tegra_ictlr_domain_ops = {
+ .xlate = tegra_ictlr_domain_xlate,
+ .alloc = tegra_ictlr_domain_alloc,
+ .free = tegra_ictlr_domain_free,
+};
+
+static int __init tegra_ictlr_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *parent_domain, *domain;
+ const struct of_device_id *match;
+ const struct tegra_ictlr_soc *soc;
+ unsigned int i;
+ int err;
+
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ match = of_match_node(ictlr_matches, node);
+ if (!match) /* Should never happen... */
+ return -ENODEV;
+
+ soc = match->data;
+
+ lic = kzalloc(sizeof(*lic), GFP_KERNEL);
+ if (!lic)
+ return -ENOMEM;
+
+ for (i = 0; i < TEGRA_MAX_NUM_ICTLRS; i++) {
+ void __iomem *base;
+
+ base = of_iomap(node, i);
+ if (!base)
+ break;
+
+ lic->base[i] = base;
+
+ /* Disable all interrupts */
+ writel_relaxed(~0UL, base + ICTLR_CPU_IER_CLR);
+ /* All interrupts target IRQ */
+ writel_relaxed(0, base + ICTLR_CPU_IEP_CLASS);
+
+ num_ictlrs++;
+ }
+
+ if (!num_ictlrs) {
+ pr_err("%s: no valid regions, giving up\n", node->full_name);
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ WARN(num_ictlrs != soc->num_ictlrs,
+ "%s: Found %u interrupt controllers in DT; expected %u.\n",
+ node->full_name, num_ictlrs, soc->num_ictlrs);
+
+
+ domain = irq_domain_add_hierarchy(parent_domain, 0, num_ictlrs * 32,
+ node, &tegra_ictlr_domain_ops,
+ lic);
+ if (!domain) {
+ pr_err("%s: failed to allocated domain\n", node->full_name);
+ err = -ENOMEM;
+ goto out_unmap;
+ }
+
+ tegra_ictlr_syscore_init();
+
+ pr_info("%s: %d interrupts forwarded to %s\n",
+ node->full_name, num_ictlrs * 32, parent->full_name);
+
+ return 0;
+
+out_unmap:
+ for (i = 0; i < num_ictlrs; i++)
+ iounmap(lic->base[i]);
+out_free:
+ kfree(lic);
+ return err;
+}
+
+IRQCHIP_DECLARE(tegra20_ictlr, "nvidia,tegra20-ictlr", tegra_ictlr_init);
+IRQCHIP_DECLARE(tegra30_ictlr, "nvidia,tegra30-ictlr", tegra_ictlr_init);
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 03/21] ARM: tegra: skip gic_arch_extn setup if DT has a LIC node
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 01/21] ARM: tegra: irq: nuke leftovers from non-DT support Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 02/21] irqchip: tegra: add DT-based support for legacy interrupt controller Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 04/21] ARM: tegra: update DTs to expose legacy interrupt controller Marc Zyngier
` (17 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
If we detect that our DT has a LIC node, don't setup gic_arch_extn,
and skip tegra_legacy_irq_syscore_init as well.
This is only a temporary measure until that code is removed for good.
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/mach-tegra/irq.c | 12 ++++++++++++
arch/arm/mach-tegra/tegra.c | 1 -
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 7f87a50..1593c4c 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -255,11 +255,22 @@ static void tegra114_gic_cpu_pm_registration(void)
static void tegra114_gic_cpu_pm_registration(void) { }
#endif
+static const struct of_device_id tegra_ictlr_match[] __initconst = {
+ { .compatible = "nvidia,tegra20-ictlr" },
+ { .compatible = "nvidia,tegra30-ictlr" },
+ { }
+};
+
void __init tegra_init_irq(void)
{
int i;
void __iomem *distbase;
+ if (of_find_matching_node(NULL, tegra_ictlr_match))
+ goto skip_extn_setup;
+
+ tegra_legacy_irq_syscore_init();
+
distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
num_ictlrs = readl_relaxed(distbase + GIC_DIST_CTR) & 0x1f;
@@ -283,5 +294,6 @@ void __init tegra_init_irq(void)
gic_arch_extn.irq_set_wake = tegra_set_wake;
gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND;
+skip_extn_setup:
tegra114_gic_cpu_pm_registration();
}
diff --git a/arch/arm/mach-tegra/tegra.c b/arch/arm/mach-tegra/tegra.c
index ef016af..c33fba7 100644
--- a/arch/arm/mach-tegra/tegra.c
+++ b/arch/arm/mach-tegra/tegra.c
@@ -82,7 +82,6 @@ static void __init tegra_dt_init_irq(void)
{
tegra_init_irq();
irqchip_init();
- tegra_legacy_irq_syscore_init();
}
static void __init tegra_dt_init(void)
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 04/21] ARM: tegra: update DTs to expose legacy interrupt controller
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (2 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 03/21] ARM: tegra: skip gic_arch_extn setup if DT has a LIC node Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 05/21] DT: tegra: add binding for the " Marc Zyngier
` (16 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Describe the legacy interrupt controller in every tegra DTSI files,
and make it the parent of most interrupts.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/boot/dts/tegra114.dtsi | 16 +++++++++++++++-
arch/arm/boot/dts/tegra124.dtsi | 16 +++++++++++++++-
arch/arm/boot/dts/tegra20.dtsi | 15 ++++++++++++++-
arch/arm/boot/dts/tegra30.dtsi | 16 +++++++++++++++-
4 files changed, 59 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index 4296b53..f58a3d9 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -8,7 +8,7 @@
/ {
compatible = "nvidia,tegra114";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&lic>;
host1x at 50000000 {
compatible = "nvidia,tegra114-host1x", "simple-bus";
@@ -134,6 +134,19 @@
<0x50046000 0x2000>;
interrupts = <GIC_PPI 9
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
+ interrupt-parent = <&gic>;
+ };
+
+ lic: interrupt-controller at 60004000 {
+ compatible = "nvidia,tegra114-ictlr", "nvidia,tegra30-ictlr";
+ reg = <0x60004000 0x100>,
+ <0x60004100 0x50>,
+ <0x60004200 0x50>,
+ <0x60004300 0x50>,
+ <0x60004400 0x50>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&gic>;
};
timer at 60005000 {
@@ -766,5 +779,6 @@
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+ interrupt-parent = <&gic>;
};
};
diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index 4be06c6..db85695 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi
@@ -10,7 +10,7 @@
/ {
compatible = "nvidia,tegra124";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&lic>;
#address-cells = <2>;
#size-cells = <2>;
@@ -173,6 +173,7 @@
<0x0 0x50046000 0x0 0x2000>;
interrupts = <GIC_PPI 9
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
+ interrupt-parent = <&gic>;
};
gpu at 0,57000000 {
@@ -190,6 +191,18 @@
status = "disabled";
};
+ lic: interrupt-controller at 60004000 {
+ compatible = "nvidia,tegra124-ictlr", "nvidia,tegra30-ictlr";
+ reg = <0x0 0x60004000 0x0 0x100>,
+ <0x0 0x60004100 0x0 0x100>,
+ <0x0 0x60004200 0x0 0x100>,
+ <0x0 0x60004300 0x0 0x100>,
+ <0x0 0x60004400 0x0 0x100>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&gic>;
+ };
+
timer at 0,60005000 {
compatible = "nvidia,tegra124-timer", "nvidia,tegra20-timer";
reg = <0x0 0x60005000 0x0 0x400>;
@@ -955,5 +968,6 @@
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
+ interrupt-parent = <&gic>;
};
};
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index 8acf5d8..362bb21 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -7,7 +7,7 @@
/ {
compatible = "nvidia,tegra20";
- interrupt-parent = <&intc>;
+ interrupt-parent = <&lic>;
host1x at 50000000 {
compatible = "nvidia,tegra20-host1x", "simple-bus";
@@ -142,6 +142,7 @@
timer at 50004600 {
compatible = "arm,cortex-a9-twd-timer";
+ interrupt-parent = <&intc>;
reg = <0x50040600 0x20>;
interrupts = <GIC_PPI 13
(GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>;
@@ -154,6 +155,7 @@
0x50040100 0x0100>;
interrupt-controller;
#interrupt-cells = <3>;
+ interrupt-parent = <&intc>;
};
cache-controller at 50043000 {
@@ -165,6 +167,17 @@
cache-level = <2>;
};
+ lic: interrupt-controller at 60004000 {
+ compatible = "nvidia,tegra20-ictlr";
+ reg = <0x60004000 0x100>,
+ <0x60004100 0x50>,
+ <0x60004200 0x50>,
+ <0x60004300 0x50>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&intc>;
+ };
+
timer at 60005000 {
compatible = "nvidia,tegra20-timer";
reg = <0x60005000 0x60>;
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 99475f6..6bea674 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -8,7 +8,7 @@
/ {
compatible = "nvidia,tegra30";
- interrupt-parent = <&intc>;
+ interrupt-parent = <&lic>;
pcie-controller at 00003000 {
compatible = "nvidia,tegra30-pcie";
@@ -228,6 +228,7 @@
timer at 50004600 {
compatible = "arm,cortex-a9-twd-timer";
reg = <0x50040600 0x20>;
+ interrupt-parent = <&intc>;
interrupts = <GIC_PPI 13
(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
clocks = <&tegra_car TEGRA30_CLK_TWD>;
@@ -239,6 +240,7 @@
0x50040100 0x0100>;
interrupt-controller;
#interrupt-cells = <3>;
+ interrupt-parent = <&intc>;
};
cache-controller at 50043000 {
@@ -250,6 +252,18 @@
cache-level = <2>;
};
+ lic: interrupt-controller at 60004000 {
+ compatible = "nvidia,tegra30-ictlr";
+ reg = <0x60004000 0x100>,
+ <0x60004100 0x50>,
+ <0x60004200 0x50>,
+ <0x60004300 0x50>,
+ <0x60004400 0x50>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&intc>;
+ };
+
timer at 60005000 {
compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer";
reg = <0x60005000 0x400>;
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 05/21] DT: tegra: add binding for the legacy interrupt controller
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (3 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 04/21] ARM: tegra: update DTs to expose legacy interrupt controller Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 06/21] ARM: tegra: remove old LIC support Marc Zyngier
` (15 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
.../interrupt-controller/nvidia,tegra-ictlr.txt | 43 ++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt
diff --git a/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt b/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt
new file mode 100644
index 0000000..1099fe0
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/nvidia,tegra-ictlr.txt
@@ -0,0 +1,43 @@
+NVIDIA Legacy Interrupt Controller
+
+All Tegra SoCs contain a legacy interrupt controller that routes
+interrupts to the GIC, and also serves as a wakeup source. It is also
+referred to as "ictlr", hence the name of the binding.
+
+The HW block exposes a number of interrupt controllers, each
+implementing a set of 32 interrupts.
+
+Required properties:
+
+- compatible : should be: "nvidia,tegra<chip>-ictlr". The LIC on
+ subsequent SoCs remained backwards-compatible with Tegra30, so on
+ Tegra generations later than Tegra30 the compatible value should
+ include "nvidia,tegra30-ictlr".
+- reg : Specifies base physical address and size of the registers.
+ Each controller must be described separately (Tegra20 has 4 of them,
+ whereas Tegra30 and later have 5"
+- interrupt-controller : Identifies the node as an interrupt controller.
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value must be 3.
+- interrupt-parent : a phandle to the GIC these interrupts are routed
+ to.
+
+Notes:
+
+- Because this HW ultimately routes interrupts to the GIC, the
+ interrupt specifier must be that of the GIC.
+- Only SPIs can use the ictlr as an interrupt parent. SGIs and PPIs
+ are explicitly forbidden.
+
+Example:
+
+ ictlr: interrupt-controller at 60004000 {
+ compatible = "nvidia,tegra20-ictlr", "nvidia,tegra-ictlr";
+ reg = <0x60004000 64>,
+ <0x60004100 64>,
+ <0x60004200 64>,
+ <0x60004300 64>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&intc>;
+ };
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 06/21] ARM: tegra: remove old LIC support
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (4 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 05/21] DT: tegra: add binding for the " Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 07/21] genirq: Add irqchip_set_wake_parent Marc Zyngier
` (14 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Now that all DTs have been updated, entierely drop support for
the non-DT code.
This is likely to break platforms that do not update their DT,
so print a warning at boot time.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/mach-tegra/iomap.h | 15 ----
arch/arm/mach-tegra/irq.c | 201 +-------------------------------------------
arch/arm/mach-tegra/irq.h | 6 --
3 files changed, 2 insertions(+), 220 deletions(-)
diff --git a/arch/arm/mach-tegra/iomap.h b/arch/arm/mach-tegra/iomap.h
index ee79808..81dc950 100644
--- a/arch/arm/mach-tegra/iomap.h
+++ b/arch/arm/mach-tegra/iomap.h
@@ -31,21 +31,6 @@
#define TEGRA_ARM_INT_DIST_BASE 0x50041000
#define TEGRA_ARM_INT_DIST_SIZE SZ_4K
-#define TEGRA_PRIMARY_ICTLR_BASE 0x60004000
-#define TEGRA_PRIMARY_ICTLR_SIZE SZ_64
-
-#define TEGRA_SECONDARY_ICTLR_BASE 0x60004100
-#define TEGRA_SECONDARY_ICTLR_SIZE SZ_64
-
-#define TEGRA_TERTIARY_ICTLR_BASE 0x60004200
-#define TEGRA_TERTIARY_ICTLR_SIZE SZ_64
-
-#define TEGRA_QUATERNARY_ICTLR_BASE 0x60004300
-#define TEGRA_QUATERNARY_ICTLR_SIZE SZ_64
-
-#define TEGRA_QUINARY_ICTLR_BASE 0x60004400
-#define TEGRA_QUINARY_ICTLR_SIZE SZ_64
-
#define TEGRA_TMR1_BASE 0x60005000
#define TEGRA_TMR1_SIZE SZ_8
diff --git a/arch/arm/mach-tegra/irq.c b/arch/arm/mach-tegra/irq.c
index 1593c4c..3b9098d 100644
--- a/arch/arm/mach-tegra/irq.c
+++ b/arch/arm/mach-tegra/irq.c
@@ -30,43 +30,9 @@
#include "board.h"
#include "iomap.h"
-#define ICTLR_CPU_IEP_VFIQ 0x08
-#define ICTLR_CPU_IEP_FIR 0x14
-#define ICTLR_CPU_IEP_FIR_SET 0x18
-#define ICTLR_CPU_IEP_FIR_CLR 0x1c
-
-#define ICTLR_CPU_IER 0x20
-#define ICTLR_CPU_IER_SET 0x24
-#define ICTLR_CPU_IER_CLR 0x28
-#define ICTLR_CPU_IEP_CLASS 0x2C
-
-#define ICTLR_COP_IER 0x30
-#define ICTLR_COP_IER_SET 0x34
-#define ICTLR_COP_IER_CLR 0x38
-#define ICTLR_COP_IEP_CLASS 0x3c
-
-#define FIRST_LEGACY_IRQ 32
-#define TEGRA_MAX_NUM_ICTLRS 5
-
#define SGI_MASK 0xFFFF
-static int num_ictlrs;
-
-static void __iomem *ictlr_reg_base[] = {
- IO_ADDRESS(TEGRA_PRIMARY_ICTLR_BASE),
- IO_ADDRESS(TEGRA_SECONDARY_ICTLR_BASE),
- IO_ADDRESS(TEGRA_TERTIARY_ICTLR_BASE),
- IO_ADDRESS(TEGRA_QUATERNARY_ICTLR_BASE),
- IO_ADDRESS(TEGRA_QUINARY_ICTLR_BASE),
-};
-
#ifdef CONFIG_PM_SLEEP
-static u32 cop_ier[TEGRA_MAX_NUM_ICTLRS];
-static u32 cop_iep[TEGRA_MAX_NUM_ICTLRS];
-static u32 cpu_ier[TEGRA_MAX_NUM_ICTLRS];
-static u32 cpu_iep[TEGRA_MAX_NUM_ICTLRS];
-
-static u32 ictlr_wake_mask[TEGRA_MAX_NUM_ICTLRS];
static void __iomem *tegra_gic_cpu_base;
#endif
@@ -83,140 +49,7 @@ bool tegra_pending_sgi(void)
return false;
}
-static inline void tegra_irq_write_mask(unsigned int irq, unsigned long reg)
-{
- void __iomem *base;
- u32 mask;
-
- BUG_ON(irq < FIRST_LEGACY_IRQ ||
- irq >= FIRST_LEGACY_IRQ + num_ictlrs * 32);
-
- base = ictlr_reg_base[(irq - FIRST_LEGACY_IRQ) / 32];
- mask = BIT((irq - FIRST_LEGACY_IRQ) % 32);
-
- __raw_writel(mask, base + reg);
-}
-
-static void tegra_mask(struct irq_data *d)
-{
- if (d->hwirq < FIRST_LEGACY_IRQ)
- return;
-
- tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IER_CLR);
-}
-
-static void tegra_unmask(struct irq_data *d)
-{
- if (d->hwirq < FIRST_LEGACY_IRQ)
- return;
-
- tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IER_SET);
-}
-
-static void tegra_ack(struct irq_data *d)
-{
- if (d->hwirq < FIRST_LEGACY_IRQ)
- return;
-
- tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IEP_FIR_CLR);
-}
-
-static void tegra_eoi(struct irq_data *d)
-{
- if (d->hwirq < FIRST_LEGACY_IRQ)
- return;
-
- tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IEP_FIR_CLR);
-}
-
-static int tegra_retrigger(struct irq_data *d)
-{
- if (d->hwirq < FIRST_LEGACY_IRQ)
- return 0;
-
- tegra_irq_write_mask(d->hwirq, ICTLR_CPU_IEP_FIR_SET);
-
- return 1;
-}
-
#ifdef CONFIG_PM_SLEEP
-static int tegra_set_wake(struct irq_data *d, unsigned int enable)
-{
- u32 irq = d->hwirq;
- u32 index, mask;
-
- if (irq < FIRST_LEGACY_IRQ ||
- irq >= FIRST_LEGACY_IRQ + num_ictlrs * 32)
- return -EINVAL;
-
- index = ((irq - FIRST_LEGACY_IRQ) / 32);
- mask = BIT((irq - FIRST_LEGACY_IRQ) % 32);
- if (enable)
- ictlr_wake_mask[index] |= mask;
- else
- ictlr_wake_mask[index] &= ~mask;
-
- return 0;
-}
-
-static int tegra_legacy_irq_suspend(void)
-{
- unsigned long flags;
- int i;
-
- local_irq_save(flags);
- for (i = 0; i < num_ictlrs; i++) {
- void __iomem *ictlr = ictlr_reg_base[i];
- /* Save interrupt state */
- cpu_ier[i] = readl_relaxed(ictlr + ICTLR_CPU_IER);
- cpu_iep[i] = readl_relaxed(ictlr + ICTLR_CPU_IEP_CLASS);
- cop_ier[i] = readl_relaxed(ictlr + ICTLR_COP_IER);
- cop_iep[i] = readl_relaxed(ictlr + ICTLR_COP_IEP_CLASS);
-
- /* Disable COP interrupts */
- writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
-
- /* Disable CPU interrupts */
- writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
-
- /* Enable the wakeup sources of ictlr */
- writel_relaxed(ictlr_wake_mask[i], ictlr + ICTLR_CPU_IER_SET);
- }
- local_irq_restore(flags);
-
- return 0;
-}
-
-static void tegra_legacy_irq_resume(void)
-{
- unsigned long flags;
- int i;
-
- local_irq_save(flags);
- for (i = 0; i < num_ictlrs; i++) {
- void __iomem *ictlr = ictlr_reg_base[i];
- writel_relaxed(cpu_iep[i], ictlr + ICTLR_CPU_IEP_CLASS);
- writel_relaxed(~0ul, ictlr + ICTLR_CPU_IER_CLR);
- writel_relaxed(cpu_ier[i], ictlr + ICTLR_CPU_IER_SET);
- writel_relaxed(cop_iep[i], ictlr + ICTLR_COP_IEP_CLASS);
- writel_relaxed(~0ul, ictlr + ICTLR_COP_IER_CLR);
- writel_relaxed(cop_ier[i], ictlr + ICTLR_COP_IER_SET);
- }
- local_irq_restore(flags);
-}
-
-static struct syscore_ops tegra_legacy_irq_syscore_ops = {
- .suspend = tegra_legacy_irq_suspend,
- .resume = tegra_legacy_irq_resume,
-};
-
-int tegra_legacy_irq_syscore_init(void)
-{
- register_syscore_ops(&tegra_legacy_irq_syscore_ops);
-
- return 0;
-}
-
static int tegra_gic_notifier(struct notifier_block *self,
unsigned long cmd, void *v)
{
@@ -251,7 +84,6 @@ static void tegra114_gic_cpu_pm_registration(void)
cpu_pm_register_notifier(&tegra_gic_notifier_block);
}
#else
-#define tegra_set_wake NULL
static void tegra114_gic_cpu_pm_registration(void) { }
#endif
@@ -263,37 +95,8 @@ static const struct of_device_id tegra_ictlr_match[] __initconst = {
void __init tegra_init_irq(void)
{
- int i;
- void __iomem *distbase;
-
- if (of_find_matching_node(NULL, tegra_ictlr_match))
- goto skip_extn_setup;
-
- tegra_legacy_irq_syscore_init();
-
- distbase = IO_ADDRESS(TEGRA_ARM_INT_DIST_BASE);
- num_ictlrs = readl_relaxed(distbase + GIC_DIST_CTR) & 0x1f;
-
- if (num_ictlrs > ARRAY_SIZE(ictlr_reg_base)) {
- WARN(1, "Too many (%d) interrupt controllers found. Maximum is %d.",
- num_ictlrs, ARRAY_SIZE(ictlr_reg_base));
- num_ictlrs = ARRAY_SIZE(ictlr_reg_base);
- }
-
- for (i = 0; i < num_ictlrs; i++) {
- void __iomem *ictlr = ictlr_reg_base[i];
- writel(~0, ictlr + ICTLR_CPU_IER_CLR);
- writel(0, ictlr + ICTLR_CPU_IEP_CLASS);
- }
-
- gic_arch_extn.irq_ack = tegra_ack;
- gic_arch_extn.irq_eoi = tegra_eoi;
- gic_arch_extn.irq_mask = tegra_mask;
- gic_arch_extn.irq_unmask = tegra_unmask;
- gic_arch_extn.irq_retrigger = tegra_retrigger;
- gic_arch_extn.irq_set_wake = tegra_set_wake;
- gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND;
+ if (WARN_ON(!of_find_matching_node(NULL, tegra_ictlr_match)))
+ pr_warn("Outdated DT detected, suspend/resume will NOT work\n");
-skip_extn_setup:
tegra114_gic_cpu_pm_registration();
}
diff --git a/arch/arm/mach-tegra/irq.h b/arch/arm/mach-tegra/irq.h
index bc05ce5..5142649 100644
--- a/arch/arm/mach-tegra/irq.h
+++ b/arch/arm/mach-tegra/irq.h
@@ -19,10 +19,4 @@
bool tegra_pending_sgi(void);
-#ifdef CONFIG_PM_SLEEP
-int tegra_legacy_irq_syscore_init(void);
-#else
-static inline int tegra_legacy_irq_syscore_init(void) { return 0; }
-#endif
-
#endif
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 07/21] genirq: Add irqchip_set_wake_parent
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (5 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 06/21] ARM: tegra: remove old LIC support Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 08/21] irqchip: crossbar: convert dra7 crossbar to stacked domains Marc Zyngier
` (13 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
This proves to be useful with stacked domains, when the current
domain doesn't implement wake-up, but expect the parent to do so.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
include/linux/irq.h | 1 +
kernel/irq/chip.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index d09ec7a..3057c48 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -460,6 +460,7 @@ extern void irq_chip_eoi_parent(struct irq_data *data);
extern int irq_chip_set_affinity_parent(struct irq_data *data,
const struct cpumask *dest,
bool force);
+extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
#endif
/* Handling of unhandled and spurious interrupts: */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 6f1c7a5..eb9a4ea 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -948,6 +948,22 @@ int irq_chip_retrigger_hierarchy(struct irq_data *data)
return -ENOSYS;
}
+
+/**
+ * irq_chip_set_wake_parent - Set/reset wake-up on the parent interrupt
+ * @data: Pointer to interrupt specific data
+ * @on: Whether to set or reset the wake-up capability of this irq
+ *
+ * Conditional, as the underlying parent chip might not implement it.
+ */
+int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
+{
+ data = data->parent_data;
+ if (data->chip->irq_set_wake)
+ return data->chip->irq_set_wake(data, on);
+
+ return -ENOSYS;
+}
#endif
/**
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 08/21] irqchip: crossbar: convert dra7 crossbar to stacked domains
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (6 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 07/21] genirq: Add irqchip_set_wake_parent Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 09/21] DT: update ti,irq-crossbar binding Marc Zyngier
` (12 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Support for the TI crossbar used on the DRA7 family of chips
is implemented as an ugly hack on the side of the GIC.
Converting it to stacked domains makes it slightly more
palatable, as it results in a cleanup.
Unfortunately, as the DT bindings failed to acknowledge the
fact that this is actually yet another interrupt controller
(the third, actually), we have yet another breakage. Oh well.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/boot/dts/am57xx-beagle-x15.dts | 3 +-
arch/arm/boot/dts/dra7-evm.dts | 2 +-
arch/arm/boot/dts/dra7.dtsi | 35 +++---
arch/arm/boot/dts/dra72-evm.dts | 1 -
arch/arm/boot/dts/dra72x.dtsi | 3 +-
arch/arm/boot/dts/dra74x.dtsi | 5 +-
arch/arm/mach-omap2/omap4-common.c | 4 -
drivers/irqchip/irq-crossbar.c | 207 ++++++++++++++++++--------------
include/linux/irqchip/irq-crossbar.h | 11 --
9 files changed, 146 insertions(+), 125 deletions(-)
delete mode 100644 include/linux/irqchip/irq-crossbar.h
diff --git a/arch/arm/boot/dts/am57xx-beagle-x15.dts b/arch/arm/boot/dts/am57xx-beagle-x15.dts
index 49edbda..c2241c2 100644
--- a/arch/arm/boot/dts/am57xx-beagle-x15.dts
+++ b/arch/arm/boot/dts/am57xx-beagle-x15.dts
@@ -335,7 +335,6 @@
mcp_rtc: rtc at 6f {
compatible = "microchip,mcp7941x";
reg = <0x6f>;
- interrupt-parent = <&gic>;
interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_LOW>; /* IRQ_SYS_1N */
pinctrl-names = "default";
@@ -358,7 +357,7 @@
&uart3 {
status = "okay";
- interrupts-extended = <&gic GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
+ interrupts-extended = <&crossbar_mpu GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
<&dra7_pmx_core 0x248>;
pinctrl-names = "default";
diff --git a/arch/arm/boot/dts/dra7-evm.dts b/arch/arm/boot/dts/dra7-evm.dts
index 10b725c..048cfeb 100644
--- a/arch/arm/boot/dts/dra7-evm.dts
+++ b/arch/arm/boot/dts/dra7-evm.dts
@@ -423,7 +423,7 @@
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&uart1_pins>;
- interrupts-extended = <&gic GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
+ interrupts-extended = <&crossbar_mpu GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>,
<&dra7_pmx_core 0x3e0>;
};
diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 22771bc..6f90673 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -13,14 +13,13 @@
#include "skeleton.dtsi"
#define MAX_SOURCES 400
-#define DIRECT_IRQ(irq) (MAX_SOURCES + irq)
/ {
#address-cells = <1>;
#size-cells = <1>;
compatible = "ti,dra7xx";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&crossbar_mpu>;
aliases {
i2c0 = &i2c1;
@@ -50,18 +49,19 @@
<GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_LOW)>;
+ interrupt-parent = <&gic>;
};
gic: interrupt-controller at 48211000 {
compatible = "arm,cortex-a15-gic";
interrupt-controller;
#interrupt-cells = <3>;
- arm,routable-irqs = <192>;
reg = <0x48211000 0x1000>,
<0x48212000 0x1000>,
<0x48214000 0x2000>,
<0x48216000 0x2000>;
interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(2) | IRQ_TYPE_LEVEL_HIGH)>;
+ interrupt-parent = <&gic>;
};
/*
@@ -91,8 +91,8 @@
ti,hwmods = "l3_main_1", "l3_main_2";
reg = <0x44000000 0x1000000>,
<0x45000000 0x1000>;
- interrupts = <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI DIRECT_IRQ(10) IRQ_TYPE_LEVEL_HIGH>;
+ interrupts-extended = <&crossbar_mpu GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
+ <&gic GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
prm: prm at 4ae06000 {
compatible = "ti,dra7-prm";
@@ -344,7 +344,7 @@
uart1: serial at 4806a000 {
compatible = "ti,omap4-uart";
reg = <0x4806a000 0x100>;
- interrupts-extended = <&gic GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts-extended = <&crossbar_mpu GIC_SPI 67 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart1";
clock-frequency = <48000000>;
status = "disabled";
@@ -355,7 +355,7 @@
uart2: serial at 4806c000 {
compatible = "ti,omap4-uart";
reg = <0x4806c000 0x100>;
- interrupts-extended = <&gic GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 68 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart2";
clock-frequency = <48000000>;
status = "disabled";
@@ -366,7 +366,7 @@
uart3: serial at 48020000 {
compatible = "ti,omap4-uart";
reg = <0x48020000 0x100>;
- interrupts-extended = <&gic GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart3";
clock-frequency = <48000000>;
status = "disabled";
@@ -377,7 +377,7 @@
uart4: serial at 4806e000 {
compatible = "ti,omap4-uart";
reg = <0x4806e000 0x100>;
- interrupts-extended = <&gic GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart4";
clock-frequency = <48000000>;
status = "disabled";
@@ -388,7 +388,7 @@
uart5: serial at 48066000 {
compatible = "ti,omap4-uart";
reg = <0x48066000 0x100>;
- interrupts-extended = <&gic GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart5";
clock-frequency = <48000000>;
status = "disabled";
@@ -399,7 +399,7 @@
uart6: serial at 48068000 {
compatible = "ti,omap4-uart";
reg = <0x48068000 0x100>;
- interrupts-extended = <&gic GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart6";
clock-frequency = <48000000>;
status = "disabled";
@@ -410,7 +410,7 @@
uart7: serial at 48420000 {
compatible = "ti,omap4-uart";
reg = <0x48420000 0x100>;
- interrupts-extended = <&gic GIC_SPI 218 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 218 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart7";
clock-frequency = <48000000>;
status = "disabled";
@@ -419,7 +419,7 @@
uart8: serial at 48422000 {
compatible = "ti,omap4-uart";
reg = <0x48422000 0x100>;
- interrupts-extended = <&gic GIC_SPI 219 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 219 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart8";
clock-frequency = <48000000>;
status = "disabled";
@@ -428,7 +428,7 @@
uart9: serial at 48424000 {
compatible = "ti,omap4-uart";
reg = <0x48424000 0x100>;
- interrupts-extended = <&gic GIC_SPI 220 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 220 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart9";
clock-frequency = <48000000>;
status = "disabled";
@@ -437,7 +437,7 @@
uart10: serial at 4ae2b000 {
compatible = "ti,omap4-uart";
reg = <0x4ae2b000 0x100>;
- interrupts-extended = <&gic GIC_SPI 221 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 221 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart10";
clock-frequency = <48000000>;
status = "disabled";
@@ -1333,9 +1333,12 @@
status = "disabled";
};
- crossbar_mpu: crossbar at 4a020000 {
+ crossbar_mpu: crossbar at 4a002a48 {
compatible = "ti,irq-crossbar";
reg = <0x4a002a48 0x130>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
+ #interrupt-cells = <3>;
ti,max-irqs = <160>;
ti,max-crossbar-sources = <MAX_SOURCES>;
ti,reg-size = <2>;
diff --git a/arch/arm/boot/dts/dra72-evm.dts b/arch/arm/boot/dts/dra72-evm.dts
index 89085d0..298df33 100644
--- a/arch/arm/boot/dts/dra72-evm.dts
+++ b/arch/arm/boot/dts/dra72-evm.dts
@@ -137,7 +137,6 @@
pinctrl-0 = <&tps65917_pins_default>;
interrupts = <GIC_SPI 2 IRQ_TYPE_NONE>; /* IRQ_SYS_1N */
- interrupt-parent = <&gic>;
interrupt-controller;
#interrupt-cells = <2>;
diff --git a/arch/arm/boot/dts/dra72x.dtsi b/arch/arm/boot/dts/dra72x.dtsi
index e5a3d23..e782bf1 100644
--- a/arch/arm/boot/dts/dra72x.dtsi
+++ b/arch/arm/boot/dts/dra72x.dtsi
@@ -25,6 +25,7 @@
pmu {
compatible = "arm,cortex-a15-pmu";
- interrupts = <GIC_SPI DIRECT_IRQ(131) IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&gic>;
+ interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
};
};
diff --git a/arch/arm/boot/dts/dra74x.dtsi b/arch/arm/boot/dts/dra74x.dtsi
index 10173fa..0fc758d 100644
--- a/arch/arm/boot/dts/dra74x.dtsi
+++ b/arch/arm/boot/dts/dra74x.dtsi
@@ -41,8 +41,9 @@
pmu {
compatible = "arm,cortex-a15-pmu";
- interrupts = <GIC_SPI DIRECT_IRQ(131) IRQ_TYPE_LEVEL_HIGH>,
- <GIC_SPI DIRECT_IRQ(132) IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&gic>;
+ interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 132 IRQ_TYPE_LEVEL_HIGH>;
};
ocp {
diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
index b7cb44a..490d95e 100644
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -22,7 +22,6 @@
#include <linux/of_platform.h>
#include <linux/export.h>
#include <linux/irqchip/arm-gic.h>
-#include <linux/irqchip/irq-crossbar.h>
#include <linux/of_address.h>
#include <linux/reboot.h>
#include <linux/genalloc.h>
@@ -274,8 +273,5 @@ void __init omap_gic_of_init(void)
skip_errata_init:
omap_wakeupgen_init();
-#ifdef CONFIG_IRQ_CROSSBAR
- irqcrossbar_init();
-#endif
irqchip_init();
}
diff --git a/drivers/irqchip/irq-crossbar.c b/drivers/irqchip/irq-crossbar.c
index bbbaf5d..a2f2dec 100644
--- a/drivers/irqchip/irq-crossbar.c
+++ b/drivers/irqchip/irq-crossbar.c
@@ -11,11 +11,12 @@
*/
#include <linux/err.h>
#include <linux/io.h>
+#include <linux/irqdomain.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
#include <linux/slab.h>
-#include <linux/irqchip/arm-gic.h>
-#include <linux/irqchip/irq-crossbar.h>
+
+#include "irqchip.h"
#define IRQ_FREE -1
#define IRQ_RESERVED -2
@@ -24,6 +25,7 @@
/**
* struct crossbar_device - crossbar device description
+ * @lock: spinlock serializing access to @irq_map
* @int_max: maximum number of supported interrupts
* @safe_map: safe default value to initialize the crossbar
* @max_crossbar_sources: Maximum number of crossbar sources
@@ -33,6 +35,7 @@
* @write: register write function pointer
*/
struct crossbar_device {
+ raw_spinlock_t lock;
uint int_max;
uint safe_map;
uint max_crossbar_sources;
@@ -44,72 +47,98 @@ struct crossbar_device {
static struct crossbar_device *cb;
-static inline void crossbar_writel(int irq_no, int cb_no)
+static void crossbar_writel(int irq_no, int cb_no)
{
writel(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
-static inline void crossbar_writew(int irq_no, int cb_no)
+static void crossbar_writew(int irq_no, int cb_no)
{
writew(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
-static inline void crossbar_writeb(int irq_no, int cb_no)
+static void crossbar_writeb(int irq_no, int cb_no)
{
writeb(cb_no, cb->crossbar_base + cb->register_offsets[irq_no]);
}
-static inline int get_prev_map_irq(int cb_no)
-{
- int i;
-
- for (i = cb->int_max - 1; i >= 0; i--)
- if (cb->irq_map[i] == cb_no)
- return i;
-
- return -ENODEV;
-}
+static struct irq_chip crossbar_chip = {
+ .name = "CBAR",
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_wake = irq_chip_set_wake_parent,
+};
-static inline int allocate_free_irq(int cb_no)
+static int allocate_gic_irq(struct irq_domain *domain, unsigned virq,
+ irq_hw_number_t hwirq)
{
+ struct of_phandle_args args;
int i;
+ int err;
+ raw_spin_lock(&cb->lock);
for (i = cb->int_max - 1; i >= 0; i--) {
if (cb->irq_map[i] == IRQ_FREE) {
- cb->irq_map[i] = cb_no;
- return i;
+ cb->irq_map[i] = hwirq;
+ break;
}
}
+ raw_spin_unlock(&cb->lock);
- return -ENODEV;
-}
+ if (i < 0)
+ return -ENODEV;
-static inline bool needs_crossbar_write(irq_hw_number_t hw)
-{
- int cb_no;
+ args.np = domain->parent->of_node;
+ args.args_count = 3;
+ args.args[0] = 0; /* SPI */
+ args.args[1] = i;
+ args.args[2] = IRQ_TYPE_LEVEL_HIGH;
- if (hw > GIC_IRQ_START) {
- cb_no = cb->irq_map[hw - GIC_IRQ_START];
- if (cb_no != IRQ_RESERVED && cb_no != IRQ_SKIP)
- return true;
- }
+ err = irq_domain_alloc_irqs_parent(domain, virq, 1, &args);
+ if (err)
+ cb->irq_map[i] = IRQ_FREE;
+ else
+ cb->write(i, hwirq);
- return false;
+ return err;
}
-static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
+static int crossbar_domain_alloc(struct irq_domain *d, unsigned int virq,
+ unsigned int nr_irqs, void *data)
{
- if (needs_crossbar_write(hw))
- cb->write(hw - GIC_IRQ_START, cb->irq_map[hw - GIC_IRQ_START]);
+ struct of_phandle_args *args = data;
+ irq_hw_number_t hwirq;
+ int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+ if ((hwirq + nr_irqs) > cb->max_crossbar_sources)
+ return -EINVAL; /* Can't deal with this */
+
+ for (i = 0; i < nr_irqs; i++) {
+ int err = allocate_gic_irq(d, virq + i, hwirq + i);
+
+ if (err)
+ return err;
+
+ irq_domain_set_hwirq_and_chip(d, virq + i, hwirq + i,
+ &crossbar_chip, NULL);
+ }
return 0;
}
/**
- * crossbar_domain_unmap - unmap a crossbar<->irq connection
- * @d: domain of irq to unmap
- * @irq: virq number
+ * crossbar_domain_free - unmap/free a crossbar<->irq connection
+ * @domain: domain of irq to unmap
+ * @virq: virq number
+ * @nr_irqs: number of irqs to free
*
* We do not maintain a use count of total number of map/unmap
* calls for a particular irq to find out if a irq can be really
@@ -117,14 +146,20 @@ static int crossbar_domain_map(struct irq_domain *d, unsigned int irq,
* after which irq is anyways unusable. So an explicit map has to be called
* after that.
*/
-static void crossbar_domain_unmap(struct irq_domain *d, unsigned int irq)
+static void crossbar_domain_free(struct irq_domain *domain, unsigned int virq,
+ unsigned int nr_irqs)
{
- irq_hw_number_t hw = irq_get_irq_data(irq)->hwirq;
+ int i;
- if (needs_crossbar_write(hw)) {
- cb->irq_map[hw - GIC_IRQ_START] = IRQ_FREE;
- cb->write(hw - GIC_IRQ_START, cb->safe_map);
+ raw_spin_lock(&cb->lock);
+ for (i = 0; i < nr_irqs; i++) {
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq + i);
+
+ irq_domain_reset_irq_data(d);
+ cb->irq_map[d->hwirq] = IRQ_FREE;
+ cb->write(d->hwirq, cb->safe_map);
}
+ raw_spin_unlock(&cb->lock);
}
static int crossbar_domain_xlate(struct irq_domain *d,
@@ -133,44 +168,22 @@ static int crossbar_domain_xlate(struct irq_domain *d,
unsigned long *out_hwirq,
unsigned int *out_type)
{
- int ret;
- int req_num = intspec[1];
- int direct_map_num;
-
- if (req_num >= cb->max_crossbar_sources) {
- direct_map_num = req_num - cb->max_crossbar_sources;
- if (direct_map_num < cb->int_max) {
- ret = cb->irq_map[direct_map_num];
- if (ret == IRQ_RESERVED || ret == IRQ_SKIP) {
- /* We use the interrupt num as h/w irq num */
- ret = direct_map_num;
- goto found;
- }
- }
-
- pr_err("%s: requested crossbar number %d > max %d\n",
- __func__, req_num, cb->max_crossbar_sources);
- return -EINVAL;
- }
-
- ret = get_prev_map_irq(req_num);
- if (ret >= 0)
- goto found;
-
- ret = allocate_free_irq(req_num);
-
- if (ret < 0)
- return ret;
-
-found:
- *out_hwirq = ret + GIC_IRQ_START;
+ if (d->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
return 0;
}
-static const struct irq_domain_ops routable_irq_domain_ops = {
- .map = crossbar_domain_map,
- .unmap = crossbar_domain_unmap,
- .xlate = crossbar_domain_xlate
+static const struct irq_domain_ops crossbar_domain_ops = {
+ .alloc = crossbar_domain_alloc,
+ .free = crossbar_domain_free,
+ .xlate = crossbar_domain_xlate,
};
static int __init crossbar_of_init(struct device_node *node)
@@ -293,7 +306,8 @@ static int __init crossbar_of_init(struct device_node *node)
cb->write(i, cb->safe_map);
}
- register_routable_domain_ops(&routable_irq_domain_ops);
+ raw_spin_lock_init(&cb->lock);
+
return 0;
err_reg_offset:
@@ -309,18 +323,37 @@ err_cb:
return ret;
}
-static const struct of_device_id crossbar_match[] __initconst = {
- { .compatible = "ti,irq-crossbar" },
- {}
-};
-
-int __init irqcrossbar_init(void)
+static int __init irqcrossbar_init(struct device_node *node,
+ struct device_node *parent)
{
- struct device_node *np;
- np = of_find_matching_node(NULL, crossbar_match);
- if (!np)
+ struct irq_domain *parent_domain, *domain;
+ int err;
+
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ err = crossbar_of_init(node);
+ if (err)
+ return err;
+
+ domain = irq_domain_add_hierarchy(parent_domain, 0,
+ cb->max_crossbar_sources,
+ node, &crossbar_domain_ops,
+ NULL);
+ if (!domain) {
+ pr_err("%s: failed to allocated domain\n", node->full_name);
+ return -ENOMEM;
+ }
- crossbar_of_init(np);
return 0;
}
+
+IRQCHIP_DECLARE(ti_irqcrossbar, "ti,irq-crossbar", irqcrossbar_init);
diff --git a/include/linux/irqchip/irq-crossbar.h b/include/linux/irqchip/irq-crossbar.h
deleted file mode 100644
index e5537b8..0000000
--- a/include/linux/irqchip/irq-crossbar.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/*
- * drivers/irqchip/irq-crossbar.h
- *
- * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- */
-int irqcrossbar_init(void);
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 09/21] DT: update ti,irq-crossbar binding
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (7 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 08/21] irqchip: crossbar: convert dra7 crossbar to stacked domains Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 10/21] irqchip: GIC: get rid of routable domain Marc Zyngier
` (11 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Make it look like a real interrupt controller.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
.../devicetree/bindings/arm/omap/crossbar.txt | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/omap/crossbar.txt b/Documentation/devicetree/bindings/arm/omap/crossbar.txt
index 4139db3..a9b28d7 100644
--- a/Documentation/devicetree/bindings/arm/omap/crossbar.txt
+++ b/Documentation/devicetree/bindings/arm/omap/crossbar.txt
@@ -9,7 +9,9 @@ inputs.
Required properties:
- compatible : Should be "ti,irq-crossbar"
- reg: Base address and the size of the crossbar registers.
-- ti,max-irqs: Total number of irqs available at the interrupt controller.
+- interrupt-controller: indicates that this block is an interrupt controller.
+- interrupt-parent: the interrupt controller this block is connected to.
+- ti,max-irqs: Total number of irqs available at the parent interrupt controller.
- ti,max-crossbar-sources: Maximum number of crossbar sources that can be routed.
- ti,reg-size: Size of a individual register in bytes. Every individual
register is assumed to be of same size. Valid sizes are 1, 2, 4.
@@ -27,13 +29,13 @@ Optional properties:
when the interrupt controller irq is unused (when not provided, default is 0)
Examples:
- crossbar_mpu: @4a020000 {
+ crossbar_mpu: crossbar at 4a002a48 {
compatible = "ti,irq-crossbar";
reg = <0x4a002a48 0x130>;
ti,max-irqs = <160>;
ti,max-crossbar-sources = <400>;
ti,reg-size = <2>;
- ti,irqs-reserved = <0 1 2 3 5 6 131 132 139 140>;
+ ti,irqs-reserved = <0 1 2 3 5 6 131 132>;
ti,irqs-skip = <10 133 139 140>;
};
@@ -44,10 +46,6 @@ Documentation/devicetree/bindings/arm/gic.txt for further details.
An interrupt consumer on an SoC using crossbar will use:
interrupts = <GIC_SPI request_number interrupt_level>
-When the request number is between 0 to that described by
-"ti,max-crossbar-sources", it is assumed to be a crossbar mapping. If the
-request_number is greater than "ti,max-crossbar-sources", then it is mapped as a
-quirky hardware mapping direct to GIC.
Example:
device_x at 0x4a023000 {
@@ -55,9 +53,3 @@ Example:
interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
...
};
-
- device_y at 0x4a033000 {
- /* Direct mapped GIC SPI 1 used */
- interrupts = <GIC_SPI DIRECT_IRQ(1) IRQ_TYPE_LEVEL_HIGH>;
- ...
- };
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 10/21] irqchip: GIC: get rid of routable domain
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (8 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 09/21] DT: update ti,irq-crossbar binding Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 11/21] DT: arm,gic: kill arm,routable-irqs Marc Zyngier
` (10 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
The only user of the so called "routable domain" functionality
now being fixed, let's clean up the GIC.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic.c | 59 ++++-------------------------------------
include/linux/irqchip/arm-gic.h | 6 -----
2 files changed, 5 insertions(+), 60 deletions(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index d617ee5..9c30a76 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -795,15 +795,12 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int irq,
irq_domain_set_info(d, irq, hw, &gic_chip, d->host_data,
handle_fasteoi_irq, NULL, NULL);
set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-
- gic_routable_irq_domain_ops->map(d, irq, hw);
}
return 0;
}
static void gic_irq_domain_unmap(struct irq_domain *d, unsigned int irq)
{
- gic_routable_irq_domain_ops->unmap(d, irq);
}
static int gic_irq_domain_xlate(struct irq_domain *d,
@@ -822,16 +819,8 @@ static int gic_irq_domain_xlate(struct irq_domain *d,
*out_hwirq = intspec[1] + 16;
/* For SPIs, we need to add 16 more to get the GIC irq ID number */
- if (!intspec[0]) {
- ret = gic_routable_irq_domain_ops->xlate(d, controller,
- intspec,
- intsize,
- out_hwirq,
- out_type);
-
- if (IS_ERR_VALUE(ret))
- return ret;
- }
+ if (!intspec[0])
+ *out_hwirq += 16;
*out_type = intspec[2] & IRQ_TYPE_SENSE_MASK;
@@ -888,37 +877,6 @@ static const struct irq_domain_ops gic_irq_domain_ops = {
.xlate = gic_irq_domain_xlate,
};
-/* Default functions for routable irq domain */
-static int gic_routable_irq_domain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hw)
-{
- return 0;
-}
-
-static void gic_routable_irq_domain_unmap(struct irq_domain *d,
- unsigned int irq)
-{
-}
-
-static int gic_routable_irq_domain_xlate(struct irq_domain *d,
- struct device_node *controller,
- const u32 *intspec, unsigned int intsize,
- unsigned long *out_hwirq,
- unsigned int *out_type)
-{
- *out_hwirq += 16;
- return 0;
-}
-
-static const struct irq_domain_ops gic_default_routable_irq_domain_ops = {
- .map = gic_routable_irq_domain_map,
- .unmap = gic_routable_irq_domain_unmap,
- .xlate = gic_routable_irq_domain_xlate,
-};
-
-const struct irq_domain_ops *gic_routable_irq_domain_ops =
- &gic_default_routable_irq_domain_ops;
-
void __init gic_init_bases(unsigned int gic_nr, int irq_start,
void __iomem *dist_base, void __iomem *cpu_base,
u32 percpu_offset, struct device_node *node)
@@ -926,7 +884,6 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
irq_hw_number_t hwirq_base;
struct gic_chip_data *gic;
int gic_irqs, irq_base, i;
- int nr_routable_irqs;
BUG_ON(gic_nr >= MAX_GIC_NR);
@@ -982,15 +939,9 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
gic->gic_irqs = gic_irqs;
if (node) { /* DT case */
- const struct irq_domain_ops *ops = &gic_irq_domain_hierarchy_ops;
-
- if (!of_property_read_u32(node, "arm,routable-irqs",
- &nr_routable_irqs)) {
- ops = &gic_irq_domain_ops;
- gic_irqs = nr_routable_irqs;
- }
-
- gic->domain = irq_domain_add_linear(node, gic_irqs, ops, gic);
+ gic->domain = irq_domain_add_linear(node, gic_irqs,
+ &gic_irq_domain_hierarchy_ops,
+ gic);
} else { /* Non-DT case */
/*
* For primary GICs, skip over SGIs.
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index 71d706d..3978c5b 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -115,11 +115,5 @@ int gic_get_cpu_id(unsigned int cpu);
void gic_migrate_target(unsigned int new_cpu_id);
unsigned long gic_get_sgir_physaddr(void);
-extern const struct irq_domain_ops *gic_routable_irq_domain_ops;
-static inline void __init register_routable_domain_ops
- (const struct irq_domain_ops *ops)
-{
- gic_routable_irq_domain_ops = ops;
-}
#endif /* __ASSEMBLY */
#endif
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 11/21] DT: arm,gic: kill arm,routable-irqs
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (9 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 10/21] irqchip: GIC: get rid of routable domain Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 12/21] DT: omap4/5: add binding for the wake-up generator Marc Zyngier
` (9 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Nobody will regret it.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
Documentation/devicetree/bindings/arm/gic.txt | 6 ------
1 file changed, 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt
index 8112d0c..631cb71 100644
--- a/Documentation/devicetree/bindings/arm/gic.txt
+++ b/Documentation/devicetree/bindings/arm/gic.txt
@@ -52,11 +52,6 @@ Optional
regions, used when the GIC doesn't have banked registers. The offset is
cpu-offset * cpu-nr.
-- arm,routable-irqs : Total number of gic irq inputs which are not directly
- connected from the peripherals, but are routed dynamically
- by a crossbar/multiplexer preceding the GIC. The GIC irq
- input line is assigned dynamically when the corresponding
- peripheral's crossbar line is mapped.
Example:
intc: interrupt-controller at fff11000 {
@@ -64,7 +59,6 @@ Example:
#interrupt-cells = <3>;
#address-cells = <1>;
interrupt-controller;
- arm,routable-irqs = <160>;
reg = <0xfff11000 0x1000>,
<0xfff10100 0x100>;
};
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 12/21] DT: omap4/5: add binding for the wake-up generator
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (10 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 11/21] DT: arm,gic: kill arm,routable-irqs Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains Marc Zyngier
` (8 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
.../interrupt-controller/ti,omap4-wugen-mpu | 33 ++++++++++++++++++++++
1 file changed, 33 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu
diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu b/Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu
new file mode 100644
index 0000000..43effa0
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/ti,omap4-wugen-mpu
@@ -0,0 +1,33 @@
+TI OMAP4 Wake-up Generator
+
+All TI OMAP4/5 (and their derivatives) an interrupt controller that
+routes interrupts to the GIC, and also serves as a wakeup source. It
+is also referred to as "WUGEN-MPU", hence the name of the binding.
+
+Reguired properties:
+
+- compatible : should contain at least "ti,omap4-wugen-mpu" or
+ "ti,omap5-wugen-mpu"
+- reg : Specifies base physical address and size of the registers.
+- interrupt-controller : Identifies the node as an interrupt controller.
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value must be 3.
+- interrupt-parent : a phandle to the GIC these interrupts are routed
+ to.
+
+Notes:
+
+- Because this HW ultimately routes interrupts to the GIC, the
+ interrupt specifier must be that of the GIC.
+- Only SPIs can use the WUGEN as an interrupt parent. SGIs and PPIs
+ are explicitly forbiden.
+
+Example:
+
+ wakeupgen: interrupt-controller at 48281000 {
+ compatible = "ti,omap5-wugen-mpu", "ti,omap4-wugen-mpu";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ reg = <0x48281000 0x1000>;
+ interrupt-parent = <&gic>;
+ };
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (11 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 12/21] DT: omap4/5: add binding for the wake-up generator Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-14 22:28 ` Tony Lindgren
2015-01-12 18:26 ` [PATCH v3 14/21] ARM: imx6: convert GPC " Marc Zyngier
` (7 subsequent siblings)
20 siblings, 1 reply; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
OMAP4/5 has been (ab)using the gic_arch_extn to provide
wakeup from suspend, and it makes a lot of sense to convert
this code to use stacked domains instead.
This patch does just this, updating the DT files to actually
reflect what the HW provides.
BIG FAT WARNING: because the DTs were so far lying by not
exposing the WUGEN HW block, kernels with this patch applied
won't have any suspend-resume facility when booted with old DTs,
and old kernels with updated DTs won't even boot.
On a platform with this patch applied, the system looks like
this:
root at bacon-fat:~# cat /proc/interrupts
CPU0 CPU1
16: 0 0 WUGEN 37 gp_timer
19: 233799 155916 GIC 27 arch_timer
23: 0 0 WUGEN 9 l3-dbg-irq
24: 1 0 WUGEN 10 l3-app-irq
27: 282 0 WUGEN 13 omap-dma-engine
44: 0 0 4ae10000.gpio 13 DMA
294: 0 0 WUGEN 20 gpmc
297: 506 0 WUGEN 56 48070000.i2c
298: 0 0 WUGEN 57 48072000.i2c
299: 0 0 WUGEN 61 48060000.i2c
300: 0 0 WUGEN 62 4807a000.i2c
301: 8 0 WUGEN 60 4807c000.i2c
308: 2439 0 WUGEN 74 OMAP UART2
312: 362 0 WUGEN 83 mmc2
313: 502 0 WUGEN 86 mmc0
314: 13 0 WUGEN 94 mmc1
350: 0 0 PRCM pinctrl, pinctrl
406: 35155709 0 GIC 109 ehci_hcd:usb1
407: 0 0 WUGEN 7 palmas
409: 0 0 WUGEN 119 twl6040
410: 0 0 twl6040 5 twl6040_irq_ready
411: 0 0 twl6040 0 twl6040_irq_th
IPI0: 0 1 CPU wakeup interrupts
IPI1: 0 0 Timer broadcast interrupts
IPI2: 95334 902334 Rescheduling interrupts
IPI3: 0 0 Function call interrupts
IPI4: 479 648 Single function call interrupts
IPI5: 0 0 CPU stop interrupts
IPI6: 0 0 IRQ work interrupts
IPI7: 0 0 completion interrupts
Err: 0
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/boot/dts/am4372.dtsi | 11 ++-
arch/arm/boot/dts/am437x-gp-evm.dts | 1 -
arch/arm/boot/dts/am437x-sk-evm.dts | 1 -
arch/arm/boot/dts/am43x-epos-evm.dts | 1 -
arch/arm/boot/dts/dra7.dtsi | 12 ++-
arch/arm/boot/dts/dra72x.dtsi | 2 +-
arch/arm/boot/dts/dra74x.dtsi | 2 +-
arch/arm/boot/dts/omap4-duovero.dtsi | 2 -
arch/arm/boot/dts/omap4-panda-common.dtsi | 8 +-
arch/arm/boot/dts/omap4-sdp.dts | 8 +-
arch/arm/boot/dts/omap4-var-som-om44.dtsi | 2 -
arch/arm/boot/dts/omap4.dtsi | 18 ++++-
arch/arm/boot/dts/omap5-cm-t54.dts | 1 -
arch/arm/boot/dts/omap5-uevm.dts | 2 -
arch/arm/boot/dts/omap5.dtsi | 26 ++++---
arch/arm/mach-omap2/omap-wakeupgen.c | 125 +++++++++++++++++++++++-------
arch/arm/mach-omap2/omap-wakeupgen.h | 1 -
arch/arm/mach-omap2/omap4-common.c | 1 -
18 files changed, 154 insertions(+), 70 deletions(-)
diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index b62a1cd..9d672a7 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -15,7 +15,7 @@
/ {
compatible = "ti,am4372", "ti,am43";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&wakeupgen>;
aliases {
@@ -48,6 +48,15 @@
#interrupt-cells = <3>;
reg = <0x48241000 0x1000>,
<0x48240100 0x0100>;
+ interrupt-parent = <&gic>;
+ };
+
+ wakeupgen: interrupt-controller at 48281000 {
+ compatible = "ti,omap4-wugen-mpu";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ reg = <0x48281000 0x1000>;
+ interrupt-parent = <&gic>;
};
l2-cache-controller at 48242000 {
diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index 7eaae4c..69f2313 100644
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -280,7 +280,6 @@
reg = <0x24>;
compatible = "ti,tps65218";
interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* NMIn */
- interrupt-parent = <&gic>;
interrupt-controller;
#interrupt-cells = <2>;
diff --git a/arch/arm/boot/dts/am437x-sk-evm.dts b/arch/arm/boot/dts/am437x-sk-evm.dts
index 53bbfc9..029bade 100644
--- a/arch/arm/boot/dts/am437x-sk-evm.dts
+++ b/arch/arm/boot/dts/am437x-sk-evm.dts
@@ -334,7 +334,6 @@
tps at 24 {
compatible = "ti,tps65218";
reg = <0x24>;
- interrupt-parent = <&gic>;
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>;
interrupt-controller;
#interrupt-cells = <2>;
diff --git a/arch/arm/boot/dts/am43x-epos-evm.dts b/arch/arm/boot/dts/am43x-epos-evm.dts
index 662261d..2d26bc1 100644
--- a/arch/arm/boot/dts/am43x-epos-evm.dts
+++ b/arch/arm/boot/dts/am43x-epos-evm.dts
@@ -333,7 +333,6 @@
reg = <0x24>;
compatible = "ti,tps65218";
interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* NMIn */
- interrupt-parent = <&gic>;
interrupt-controller;
#interrupt-cells = <2>;
diff --git a/arch/arm/boot/dts/dra7.dtsi b/arch/arm/boot/dts/dra7.dtsi
index 6f90673..a530016 100644
--- a/arch/arm/boot/dts/dra7.dtsi
+++ b/arch/arm/boot/dts/dra7.dtsi
@@ -64,6 +64,14 @@
interrupt-parent = <&gic>;
};
+ wakeupgen: interrupt-controller at 48281000 {
+ compatible = "ti,omap5-wugen-mpu", "ti,omap4-wugen-mpu";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ reg = <0x48281000 0x1000>;
+ interrupt-parent = <&gic>;
+ };
+
/*
* The soc node represents the soc top level view. It is used for IPs
* that are not memory mapped in the MPU view or for the MPU itself.
@@ -92,7 +100,7 @@
reg = <0x44000000 0x1000000>,
<0x45000000 0x1000>;
interrupts-extended = <&crossbar_mpu GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
- <&gic GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
+ <&wakeupgen GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>;
prm: prm at 4ae06000 {
compatible = "ti,dra7-prm";
@@ -1337,7 +1345,7 @@
compatible = "ti,irq-crossbar";
reg = <0x4a002a48 0x130>;
interrupt-controller;
- interrupt-parent = <&gic>;
+ interrupt-parent = <&wakeupgen>;
#interrupt-cells = <3>;
ti,max-irqs = <160>;
ti,max-crossbar-sources = <MAX_SOURCES>;
diff --git a/arch/arm/boot/dts/dra72x.dtsi b/arch/arm/boot/dts/dra72x.dtsi
index e782bf1..f7fb0d0 100644
--- a/arch/arm/boot/dts/dra72x.dtsi
+++ b/arch/arm/boot/dts/dra72x.dtsi
@@ -25,7 +25,7 @@
pmu {
compatible = "arm,cortex-a15-pmu";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&wakeupgen>;
interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
};
};
diff --git a/arch/arm/boot/dts/dra74x.dtsi b/arch/arm/boot/dts/dra74x.dtsi
index 0fc758d..00eeed7 100644
--- a/arch/arm/boot/dts/dra74x.dtsi
+++ b/arch/arm/boot/dts/dra74x.dtsi
@@ -41,7 +41,7 @@
pmu {
compatible = "arm,cortex-a15-pmu";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&wakeupgen>;
interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 132 IRQ_TYPE_LEVEL_HIGH>;
};
diff --git a/arch/arm/boot/dts/omap4-duovero.dtsi b/arch/arm/boot/dts/omap4-duovero.dtsi
index e860ccd..f2a94fa 100644
--- a/arch/arm/boot/dts/omap4-duovero.dtsi
+++ b/arch/arm/boot/dts/omap4-duovero.dtsi
@@ -173,14 +173,12 @@
twl: twl at 48 {
reg = <0x48>;
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_1N cascaded to gic */
- interrupt-parent = <&gic>;
};
twl6040: twl at 4b {
compatible = "ti,twl6040";
reg = <0x4b>;
interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_2N cascaded to gic */
- interrupt-parent = <&gic>;
ti,audpwron-gpio = <&gpio6 0 GPIO_ACTIVE_HIGH>; /* gpio_160 */
vio-supply = <&v1v8>;
diff --git a/arch/arm/boot/dts/omap4-panda-common.dtsi b/arch/arm/boot/dts/omap4-panda-common.dtsi
index 1505135..7c15fb2 100644
--- a/arch/arm/boot/dts/omap4-panda-common.dtsi
+++ b/arch/arm/boot/dts/omap4-panda-common.dtsi
@@ -372,7 +372,6 @@
reg = <0x48>;
/* IRQ# = 7 */
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_1N cascaded to gic */
- interrupt-parent = <&gic>;
};
twl6040: twl at 4b {
@@ -384,7 +383,6 @@
/* IRQ# = 119 */
interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_2N cascaded to gic */
- interrupt-parent = <&gic>;
ti,audpwron-gpio = <&gpio4 31 GPIO_ACTIVE_HIGH>; /* gpio line 127 */
vio-supply = <&v1v8>;
@@ -479,17 +477,17 @@
};
&uart2 {
- interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH
+ interrupts-extended = <&wakeupgen GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core OMAP4_UART2_RX>;
};
&uart3 {
- interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
+ interrupts-extended = <&wakeupgen GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core OMAP4_UART3_RX>;
};
&uart4 {
- interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
+ interrupts-extended = <&wakeupgen GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core OMAP4_UART4_RX>;
};
diff --git a/arch/arm/boot/dts/omap4-sdp.dts b/arch/arm/boot/dts/omap4-sdp.dts
index 3e1da43..8aca8da 100644
--- a/arch/arm/boot/dts/omap4-sdp.dts
+++ b/arch/arm/boot/dts/omap4-sdp.dts
@@ -363,7 +363,6 @@
reg = <0x48>;
/* SPI = 0, IRQ# = 7, 4 = active high level-sensitive */
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_1N cascaded to gic */
- interrupt-parent = <&gic>;
};
twl6040: twl at 4b {
@@ -375,7 +374,6 @@
/* SPI = 0, IRQ# = 119, 4 = active high level-sensitive */
interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_2N cascaded to gic */
- interrupt-parent = <&gic>;
ti,audpwron-gpio = <&gpio4 31 0>; /* gpio line 127 */
vio-supply = <&v1v8>;
@@ -570,21 +568,21 @@
};
&uart2 {
- interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH
+ interrupts-extended = <&wakeupgen GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core OMAP4_UART2_RX>;
pinctrl-names = "default";
pinctrl-0 = <&uart2_pins>;
};
&uart3 {
- interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
+ interrupts-extended = <&wakeupgen GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core OMAP4_UART3_RX>;
pinctrl-names = "default";
pinctrl-0 = <&uart3_pins>;
};
&uart4 {
- interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
+ interrupts-extended = <&wakeupgen GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH
&omap4_pmx_core OMAP4_UART4_RX>;
pinctrl-names = "default";
pinctrl-0 = <&uart4_pins>;
diff --git a/arch/arm/boot/dts/omap4-var-som-om44.dtsi b/arch/arm/boot/dts/omap4-var-som-om44.dtsi
index 062701e..a4f1ba2 100644
--- a/arch/arm/boot/dts/omap4-var-som-om44.dtsi
+++ b/arch/arm/boot/dts/omap4-var-som-om44.dtsi
@@ -185,7 +185,6 @@
reg = <0x48>;
/* SPI = 0, IRQ# = 7, 4 = active high level-sensitive */
interrupts = <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_1N cascaded to gic */
- interrupt-parent = <&gic>;
};
twl6040: twl at 4b {
@@ -197,7 +196,6 @@
/* SPI = 0, IRQ# = 119, 4 = active high level-sensitive */
interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH>; /* IRQ_SYS_2N cascaded to gic */
- interrupt-parent = <&gic>;
ti,audpwron-gpio = <&gpio6 22 0>; /* gpio 182 */
vio-supply = <&v1v8>;
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index 074147c..7cb5236 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -14,7 +14,7 @@
/ {
compatible = "ti,omap4430", "ti,omap4";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&wakeupgen>;
aliases {
i2c0 = &i2c1;
@@ -56,6 +56,7 @@
#interrupt-cells = <3>;
reg = <0x48241000 0x1000>,
<0x48240100 0x0100>;
+ interrupt-parent = <&gic>;
};
L2: l2-cache-controller at 48242000 {
@@ -70,6 +71,15 @@
clocks = <&mpu_periphclk>;
reg = <0x48240600 0x20>;
interrupts = <GIC_PPI 13 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_HIGH)>;
+ interrupt-parent = <&gic>;
+ };
+
+ wakeupgen: interrupt-controller at 48281000 {
+ compatible = "ti,omap4-wugen-mpu";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ reg = <0x48281000 0x1000>;
+ interrupt-parent = <&gic>;
};
/*
@@ -319,7 +329,7 @@
uart2: serial at 4806c000 {
compatible = "ti,omap4-uart";
reg = <0x4806c000 0x100>;
- interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart2";
clock-frequency = <48000000>;
};
@@ -327,7 +337,7 @@
uart3: serial at 48020000 {
compatible = "ti,omap4-uart";
reg = <0x48020000 0x100>;
- interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart3";
clock-frequency = <48000000>;
};
@@ -335,7 +345,7 @@
uart4: serial at 4806e000 {
compatible = "ti,omap4-uart";
reg = <0x4806e000 0x100>;
- interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart4";
clock-frequency = <48000000>;
};
diff --git a/arch/arm/boot/dts/omap5-cm-t54.dts b/arch/arm/boot/dts/omap5-cm-t54.dts
index b54b271..61ad2ea 100644
--- a/arch/arm/boot/dts/omap5-cm-t54.dts
+++ b/arch/arm/boot/dts/omap5-cm-t54.dts
@@ -412,7 +412,6 @@
palmas: palmas at 48 {
compatible = "ti,palmas";
interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* IRQ_SYS_1N */
- interrupt-parent = <&gic>;
reg = <0x48>;
interrupt-controller;
#interrupt-cells = <2>;
diff --git a/arch/arm/boot/dts/omap5-uevm.dts b/arch/arm/boot/dts/omap5-uevm.dts
index 159720d..74777a6 100644
--- a/arch/arm/boot/dts/omap5-uevm.dts
+++ b/arch/arm/boot/dts/omap5-uevm.dts
@@ -311,7 +311,6 @@
palmas: palmas at 48 {
compatible = "ti,palmas";
interrupts = <GIC_SPI 7 IRQ_TYPE_NONE>; /* IRQ_SYS_1N */
- interrupt-parent = <&gic>;
reg = <0x48>;
interrupt-controller;
#interrupt-cells = <2>;
@@ -521,7 +520,6 @@
pinctrl-0 = <&twl6040_pins>;
interrupts = <GIC_SPI 119 IRQ_TYPE_NONE>; /* IRQ_SYS_2N cascaded to gic */
- interrupt-parent = <&gic>;
ti,audpwron-gpio = <&gpio5 13 0>; /* gpio line 141 */
vio-supply = <&smps7_reg>;
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index b321fdf..b056156 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -18,7 +18,7 @@
#size-cells = <1>;
compatible = "ti,omap5";
- interrupt-parent = <&gic>;
+ interrupt-parent = <&wakeupgen>;
aliases {
i2c0 = &i2c1;
@@ -79,6 +79,7 @@
<GIC_PPI 14 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 11 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10 (GIC_CPU_MASK_RAW(3) | IRQ_TYPE_LEVEL_LOW)>;
+ interrupt-parent = <&gic>;
};
pmu {
@@ -95,6 +96,15 @@
<0x48212000 0x1000>,
<0x48214000 0x2000>,
<0x48216000 0x2000>;
+ interrupt-parent = <&gic>;
+ };
+
+ wakeupgen: interrupt-controller at 48281000 {
+ compatible = "ti,omap5-wugen-mpu", "ti,omap4-wugen-mpu";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ reg = <0x48281000 0x1000>;
+ interrupt-parent = <&gic>;
};
/*
@@ -458,7 +468,7 @@
uart1: serial at 4806a000 {
compatible = "ti,omap4-uart";
reg = <0x4806a000 0x100>;
- interrupts-extended = <&gic GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart1";
clock-frequency = <48000000>;
};
@@ -466,7 +476,7 @@
uart2: serial at 4806c000 {
compatible = "ti,omap4-uart";
reg = <0x4806c000 0x100>;
- interrupts-extended = <&gic GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart2";
clock-frequency = <48000000>;
};
@@ -474,7 +484,7 @@
uart3: serial at 48020000 {
compatible = "ti,omap4-uart";
reg = <0x48020000 0x100>;
- interrupts-extended = <&gic GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart3";
clock-frequency = <48000000>;
};
@@ -482,7 +492,7 @@
uart4: serial at 4806e000 {
compatible = "ti,omap4-uart";
reg = <0x4806e000 0x100>;
- interrupts-extended = <&gic GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart4";
clock-frequency = <48000000>;
};
@@ -490,7 +500,7 @@
uart5: serial at 48066000 {
compatible = "ti,omap4-uart";
reg = <0x48066000 0x100>;
- interrupts-extended = <&gic GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart5";
clock-frequency = <48000000>;
};
@@ -498,7 +508,7 @@
uart6: serial at 48068000 {
compatible = "ti,omap4-uart";
reg = <0x48068000 0x100>;
- interrupts-extended = <&gic GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>;
+ interrupts = <GIC_SPI 106 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "uart6";
clock-frequency = <48000000>;
};
@@ -883,14 +893,12 @@
usbhsohci: ohci at 4a064800 {
compatible = "ti,ohci-omap3";
reg = <0x4a064800 0x400>;
- interrupt-parent = <&gic>;
interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;
};
usbhsehci: ehci at 4a064c00 {
compatible = "ti,ehci-omap";
reg = <0x4a064c00 0x400>;
- interrupt-parent = <&gic>;
interrupts = <GIC_SPI 77 IRQ_TYPE_LEVEL_HIGH>;
};
};
diff --git a/arch/arm/mach-omap2/omap-wakeupgen.c b/arch/arm/mach-omap2/omap-wakeupgen.c
index f961c46..fde487d 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.c
+++ b/arch/arm/mach-omap2/omap-wakeupgen.c
@@ -20,11 +20,12 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/cpu.h>
#include <linux/notifier.h>
#include <linux/cpu_pm.h>
-#include <linux/irqchip/arm-gic.h>
#include "omap-wakeupgen.h"
#include "omap-secure.h"
@@ -78,29 +79,12 @@ static inline void sar_writel(u32 val, u32 offset, u8 idx)
static inline int _wakeupgen_get_irq_info(u32 irq, u32 *bit_posn, u8 *reg_index)
{
- unsigned int spi_irq;
-
- /*
- * PPIs and SGIs are not supported.
- */
- if (irq < OMAP44XX_IRQ_GIC_START)
- return -EINVAL;
-
- /*
- * Subtract the GIC offset.
- */
- spi_irq = irq - OMAP44XX_IRQ_GIC_START;
- if (spi_irq > MAX_IRQS) {
- pr_err("omap wakeupGen: Invalid IRQ%d\n", irq);
- return -EINVAL;
- }
-
/*
* Each WakeupGen register controls 32 interrupt.
* i.e. 1 bit per SPI IRQ
*/
- *reg_index = spi_irq >> 5;
- *bit_posn = spi_irq %= 32;
+ *reg_index = irq >> 5;
+ *bit_posn = irq %= 32;
return 0;
}
@@ -141,6 +125,7 @@ static void wakeupgen_mask(struct irq_data *d)
raw_spin_lock_irqsave(&wakeupgen_lock, flags);
_wakeupgen_clear(d->hwirq, irq_target_cpu[d->hwirq]);
raw_spin_unlock_irqrestore(&wakeupgen_lock, flags);
+ irq_chip_mask_parent(d);
}
/*
@@ -153,6 +138,7 @@ static void wakeupgen_unmask(struct irq_data *d)
raw_spin_lock_irqsave(&wakeupgen_lock, flags);
_wakeupgen_set(d->hwirq, irq_target_cpu[d->hwirq]);
raw_spin_unlock_irqrestore(&wakeupgen_lock, flags);
+ irq_chip_unmask_parent(d);
}
#ifdef CONFIG_HOTPLUG_CPU
@@ -400,15 +386,88 @@ int omap_secure_apis_support(void)
return omap_secure_apis;
}
+static struct irq_chip wakeupgen_chip = {
+ .name = "WUGEN",
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_mask = wakeupgen_mask,
+ .irq_unmask = wakeupgen_unmask,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND,
+};
+
+static int wakeupgen_domain_xlate(struct irq_domain *domain,
+ struct device_node *controller,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (domain->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
+ return 0;
+}
+
+static int wakeupgen_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct of_phandle_args *args = data;
+ struct of_phandle_args parent_args;
+ irq_hw_number_t hwirq;
+ int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+ if (hwirq >= MAX_IRQS)
+ return -EINVAL; /* Can't deal with this */
+
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &wakeupgen_chip, NULL);
+
+ parent_args = *args;
+ parent_args.np = domain->parent->of_node;
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args);
+}
+
+static struct irq_domain_ops wakeupgen_domain_ops = {
+ .xlate = wakeupgen_domain_xlate,
+ .alloc = wakeupgen_domain_alloc,
+ .free = irq_domain_free_irqs_common,
+};
+
/*
* Initialise the wakeupgen module.
*/
-int __init omap_wakeupgen_init(void)
+static int __init wakeupgen_init(struct device_node *node,
+ struct device_node *parent)
{
+ struct irq_domain *parent_domain, *domain;
int i;
unsigned int boot_cpu = smp_processor_id();
u32 val;
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
/* Not supported on OMAP4 ES1.0 silicon */
if (omap_rev() == OMAP4430_REV_ES1_0) {
WARN(1, "WakeupGen: Not supported on OMAP4430 ES1.0\n");
@@ -416,7 +475,7 @@ int __init omap_wakeupgen_init(void)
}
/* Static mapping, never released */
- wakeupgen_base = ioremap(OMAP_WKUPGEN_BASE, SZ_4K);
+ wakeupgen_base = of_iomap(node, 0);
if (WARN_ON(!wakeupgen_base))
return -ENOMEM;
@@ -429,6 +488,14 @@ int __init omap_wakeupgen_init(void)
max_irqs = AM43XX_IRQS;
}
+ domain = irq_domain_add_hierarchy(parent_domain, 0, max_irqs,
+ node, &wakeupgen_domain_ops,
+ NULL);
+ if (!domain) {
+ iounmap(wakeupgen_base);
+ return -ENOMEM;
+ }
+
/* Clear all IRQ bitmasks at wakeupGen level */
for (i = 0; i < irq_banks; i++) {
wakeupgen_writel(0, i, CPU0_ID);
@@ -437,14 +504,6 @@ int __init omap_wakeupgen_init(void)
}
/*
- * Override GIC architecture specific functions to add
- * OMAP WakeupGen interrupt controller along with GIC
- */
- gic_arch_extn.irq_mask = wakeupgen_mask;
- gic_arch_extn.irq_unmask = wakeupgen_unmask;
- gic_arch_extn.flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE;
-
- /*
* FIXME: Add support to set_smp_affinity() once the core
* GIC code has necessary hooks in place.
*/
@@ -474,3 +533,9 @@ int __init omap_wakeupgen_init(void)
return 0;
}
+
+/*
+ * We cannot use the IRQCHIP_DECLARE macro that lives in
+ * drivers/irqchip, so we're forced to roll our own. Not very nice.
+ */
+OF_DECLARE_2(irqchip, ti_wakeupgen, "ti,omap4-wugen-mpu", wakeupgen_init);
diff --git a/arch/arm/mach-omap2/omap-wakeupgen.h b/arch/arm/mach-omap2/omap-wakeupgen.h
index b3c8ecc..a3491ad 100644
--- a/arch/arm/mach-omap2/omap-wakeupgen.h
+++ b/arch/arm/mach-omap2/omap-wakeupgen.h
@@ -33,7 +33,6 @@
#define OMAP_TIMESTAMPCYCLELO 0xc08
#define OMAP_TIMESTAMPCYCLEHI 0xc0c
-extern int __init omap_wakeupgen_init(void);
extern void __iomem *omap_get_wakeupgen_base(void);
extern int omap_secure_apis_support(void);
#endif
diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
index 490d95e..9f29831 100644
--- a/arch/arm/mach-omap2/omap4-common.c
+++ b/arch/arm/mach-omap2/omap4-common.c
@@ -272,6 +272,5 @@ void __init omap_gic_of_init(void)
WARN_ON(!twd_base);
skip_errata_init:
- omap_wakeupgen_init();
irqchip_init();
}
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-12 18:26 ` [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains Marc Zyngier
@ 2015-01-14 22:28 ` Tony Lindgren
2015-01-15 14:28 ` Marc Zyngier
0 siblings, 1 reply; 36+ messages in thread
From: Tony Lindgren @ 2015-01-14 22:28 UTC (permalink / raw)
To: linux-arm-kernel
* Marc Zyngier <marc.zyngier@arm.com> [150112 10:30]:
> OMAP4/5 has been (ab)using the gic_arch_extn to provide
> wakeup from suspend, and it makes a lot of sense to convert
> this code to use stacked domains instead.
>
> This patch does just this, updating the DT files to actually
> reflect what the HW provides.
>
> BIG FAT WARNING: because the DTs were so far lying by not
> exposing the WUGEN HW block, kernels with this patch applied
> won't have any suspend-resume facility when booted with old DTs,
> and old kernels with updated DTs won't even boot.
>
> On a platform with this patch applied, the system looks like
> this:
>
> root at bacon-fat:~# cat /proc/interrupts
> CPU0 CPU1
> 16: 0 0 WUGEN 37 gp_timer
> 19: 233799 155916 GIC 27 arch_timer
> 23: 0 0 WUGEN 9 l3-dbg-irq
> 24: 1 0 WUGEN 10 l3-app-irq
> 27: 282 0 WUGEN 13 omap-dma-engine
> 44: 0 0 4ae10000.gpio 13 DMA
FYI, the legacy irq numbers are now all wrong since commit
9a1091ef0017 ("irqchip: gic: Support hierarchy irq domain.").
Started a separate thread "Regression with legacy IRQ numbers
caused by 9a1091ef0017" on it, will give these a try once
that's sorted out.
Regards,
Tony
^ permalink raw reply [flat|nested] 36+ messages in thread* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-14 22:28 ` Tony Lindgren
@ 2015-01-15 14:28 ` Marc Zyngier
2015-01-15 14:40 ` Nishanth Menon
0 siblings, 1 reply; 36+ messages in thread
From: Marc Zyngier @ 2015-01-15 14:28 UTC (permalink / raw)
To: linux-arm-kernel
On Wed, Jan 14 2015 at 10:28:14 pm GMT, Tony Lindgren <tony@atomide.com> wrote:
> * Marc Zyngier <marc.zyngier@arm.com> [150112 10:30]:
>> OMAP4/5 has been (ab)using the gic_arch_extn to provide
>> wakeup from suspend, and it makes a lot of sense to convert
>> this code to use stacked domains instead.
>>
>> This patch does just this, updating the DT files to actually
>> reflect what the HW provides.
>>
>> BIG FAT WARNING: because the DTs were so far lying by not
>> exposing the WUGEN HW block, kernels with this patch applied
>> won't have any suspend-resume facility when booted with old DTs,
>> and old kernels with updated DTs won't even boot.
>>
>> On a platform with this patch applied, the system looks like
>> this:
>>
>> root at bacon-fat:~# cat /proc/interrupts
>> CPU0 CPU1
>> 16: 0 0 WUGEN 37 gp_timer
>> 19: 233799 155916 GIC 27 arch_timer
>> 23: 0 0 WUGEN 9 l3-dbg-irq
>> 24: 1 0 WUGEN 10 l3-app-irq
>> 27: 282 0 WUGEN 13 omap-dma-engine
>> 44: 0 0 4ae10000.gpio 13 DMA
>
> FYI, the legacy irq numbers are now all wrong since commit
> 9a1091ef0017 ("irqchip: gic: Support hierarchy irq domain.").
>
> Started a separate thread "Regression with legacy IRQ numbers
> caused by 9a1091ef0017" on it, will give these a try once
> that's sorted out.
Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
this series is going to require some rework too (I need to know where
these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
Thanks,
M.
--
Jazz is not dead. It just smells funny.
^ permalink raw reply [flat|nested] 36+ messages in thread* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-15 14:28 ` Marc Zyngier
@ 2015-01-15 14:40 ` Nishanth Menon
2015-01-15 14:50 ` Marc Zyngier
0 siblings, 1 reply; 36+ messages in thread
From: Nishanth Menon @ 2015-01-15 14:40 UTC (permalink / raw)
To: linux-arm-kernel
On 14:28-20150115, Marc Zyngier wrote:
> Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
> this series is going to require some rework too (I need to know where
> these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
>
crossbar will never work with legacy static interrupts anyways - since there
was never a static interrupt possible - I believe we had removed all the
legacy hardcoded interrupt definitions for DRA7. ideally, they should
all be dt only now.
--
Regards,
Nishanth Menon
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-15 14:40 ` Nishanth Menon
@ 2015-01-15 14:50 ` Marc Zyngier
2015-01-15 17:04 ` Tony Lindgren
0 siblings, 1 reply; 36+ messages in thread
From: Marc Zyngier @ 2015-01-15 14:50 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Jan 15 2015 at 2:40:16 pm GMT, Nishanth Menon <nm@ti.com> wrote:
> On 14:28-20150115, Marc Zyngier wrote:
>> Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
>> this series is going to require some rework too (I need to know where
>> these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
>>
> crossbar will never work with legacy static interrupts anyways - since
> there was never a static interrupt possible - I believe we had removed
> all the legacy hardcoded interrupt definitions for DRA7. ideally, they
> should all be dt only now.
Yes, I guessed as much after looking at the DRA7XX hwmod.
So only OMAP4/5 is b0rken at the moment. I can probably work around it
as I did in this example patch, just by changing the compatible strings
for the xlate callback. Very ugly.
M.
--
Jazz is not dead. It just smells funny.
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-15 14:50 ` Marc Zyngier
@ 2015-01-15 17:04 ` Tony Lindgren
2015-01-15 17:28 ` Marc Zyngier
0 siblings, 1 reply; 36+ messages in thread
From: Tony Lindgren @ 2015-01-15 17:04 UTC (permalink / raw)
To: linux-arm-kernel
* Marc Zyngier <marc.zyngier@arm.com> [150115 06:53]:
> On Thu, Jan 15 2015 at 2:40:16 pm GMT, Nishanth Menon <nm@ti.com> wrote:
> > On 14:28-20150115, Marc Zyngier wrote:
> >> Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
> >> this series is going to require some rework too (I need to know where
> >> these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
> >>
> > crossbar will never work with legacy static interrupts anyways - since
> > there was never a static interrupt possible - I believe we had removed
> > all the legacy hardcoded interrupt definitions for DRA7. ideally, they
> > should all be dt only now.
>
> Yes, I guessed as much after looking at the DRA7XX hwmod.
>
> So only OMAP4/5 is b0rken at the moment. I can probably work around it
> as I did in this example patch, just by changing the compatible strings
> for the xlate callback. Very ugly.
For the -rc, it seems the wakeupen still needs a fix as based on grepping
for OMAP44XX_IRQ_GIC_START. Got any great ideas for that?
Regards,
Tony
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-15 17:04 ` Tony Lindgren
@ 2015-01-15 17:28 ` Marc Zyngier
2015-01-15 17:57 ` Tony Lindgren
0 siblings, 1 reply; 36+ messages in thread
From: Marc Zyngier @ 2015-01-15 17:28 UTC (permalink / raw)
To: linux-arm-kernel
On 15/01/15 17:04, Tony Lindgren wrote:
> * Marc Zyngier <marc.zyngier@arm.com> [150115 06:53]:
>> On Thu, Jan 15 2015 at 2:40:16 pm GMT, Nishanth Menon <nm@ti.com> wrote:
>>> On 14:28-20150115, Marc Zyngier wrote:
>>>> Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
>>>> this series is going to require some rework too (I need to know where
>>>> these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
>>>>
>>> crossbar will never work with legacy static interrupts anyways - since
>>> there was never a static interrupt possible - I believe we had removed
>>> all the legacy hardcoded interrupt definitions for DRA7. ideally, they
>>> should all be dt only now.
>>
>> Yes, I guessed as much after looking at the DRA7XX hwmod.
>>
>> So only OMAP4/5 is b0rken at the moment. I can probably work around it
>> as I did in this example patch, just by changing the compatible strings
>> for the xlate callback. Very ugly.
>
> For the -rc, it seems the wakeupen still needs a fix as based on grepping
> for OMAP44XX_IRQ_GIC_START. Got any great ideas for that?
I think this one is fine. It computes the SPI number based on the hwirq
coming from the GIC. That direction is completely unaffected by the
linear domain stuff. It is only when you try to use a hardware IRQ as a
Linux IRQ that you run into trouble.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-15 17:28 ` Marc Zyngier
@ 2015-01-15 17:57 ` Tony Lindgren
2015-01-15 18:12 ` Tony Lindgren
0 siblings, 1 reply; 36+ messages in thread
From: Tony Lindgren @ 2015-01-15 17:57 UTC (permalink / raw)
To: linux-arm-kernel
* Marc Zyngier <marc.zyngier@arm.com> [150115 09:31]:
> On 15/01/15 17:04, Tony Lindgren wrote:
> > * Marc Zyngier <marc.zyngier@arm.com> [150115 06:53]:
> >> On Thu, Jan 15 2015 at 2:40:16 pm GMT, Nishanth Menon <nm@ti.com> wrote:
> >>> On 14:28-20150115, Marc Zyngier wrote:
> >>>> Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
> >>>> this series is going to require some rework too (I need to know where
> >>>> these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
> >>>>
> >>> crossbar will never work with legacy static interrupts anyways - since
> >>> there was never a static interrupt possible - I believe we had removed
> >>> all the legacy hardcoded interrupt definitions for DRA7. ideally, they
> >>> should all be dt only now.
> >>
> >> Yes, I guessed as much after looking at the DRA7XX hwmod.
> >>
> >> So only OMAP4/5 is b0rken at the moment. I can probably work around it
> >> as I did in this example patch, just by changing the compatible strings
> >> for the xlate callback. Very ugly.
> >
> > For the -rc, it seems the wakeupen still needs a fix as based on grepping
> > for OMAP44XX_IRQ_GIC_START. Got any great ideas for that?
>
> I think this one is fine. It computes the SPI number based on the hwirq
> coming from the GIC. That direction is completely unaffected by the
> linear domain stuff. It is only when you try to use a hardware IRQ as a
> Linux IRQ that you run into trouble.
Yes OK that makes sense.
Thanks,
Tony
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains
2015-01-15 17:57 ` Tony Lindgren
@ 2015-01-15 18:12 ` Tony Lindgren
0 siblings, 0 replies; 36+ messages in thread
From: Tony Lindgren @ 2015-01-15 18:12 UTC (permalink / raw)
To: linux-arm-kernel
* Tony Lindgren <tony@atomide.com> [150115 10:04]:
> * Marc Zyngier <marc.zyngier@arm.com> [150115 09:31]:
> > On 15/01/15 17:04, Tony Lindgren wrote:
> > > * Marc Zyngier <marc.zyngier@arm.com> [150115 06:53]:
> > >> On Thu, Jan 15 2015 at 2:40:16 pm GMT, Nishanth Menon <nm@ti.com> wrote:
> > >>> On 14:28-20150115, Marc Zyngier wrote:
> > >>>> Assuming the workaround I posted earlier works, the OMAP/DRA7 part of
> > >>>> this series is going to require some rework too (I need to know where
> > >>>> these legacy interrupts are attached: crossbar, WUGEN, or GIC?).
> > >>>>
> > >>> crossbar will never work with legacy static interrupts anyways - since
> > >>> there was never a static interrupt possible - I believe we had removed
> > >>> all the legacy hardcoded interrupt definitions for DRA7. ideally, they
> > >>> should all be dt only now.
> > >>
> > >> Yes, I guessed as much after looking at the DRA7XX hwmod.
> > >>
> > >> So only OMAP4/5 is b0rken at the moment. I can probably work around it
> > >> as I did in this example patch, just by changing the compatible strings
> > >> for the xlate callback. Very ugly.
> > >
> > > For the -rc, it seems the wakeupen still needs a fix as based on grepping
> > > for OMAP44XX_IRQ_GIC_START. Got any great ideas for that?
> >
> > I think this one is fine. It computes the SPI number based on the hwirq
> > coming from the GIC. That direction is completely unaffected by the
> > linear domain stuff. It is only when you try to use a hardware IRQ as a
> > Linux IRQ that you run into trouble.
>
> Yes OK that makes sense.
And suspend and resume seem to work with your fix.
FYI, to test suspend and resume with wakeups from the serial console,
the uart wakeup events need to be enabled under sys:
#!/bin/bash
uarts=$(find /sys/class/tty/tty[SO]*/power/ -type d 2>/dev/null)
for uart in $uarts; do
echo enabled > $uart/wakeup 2>&1
done
And after that suspending with echo mem > /sys/power/state should wake
to a serial interrupt.
Regards,
Tony
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 14/21] ARM: imx6: convert GPC to stacked domains
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (12 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 13/21] ARM: omap: convert wakeupgen to stacked domains Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 19:00 ` Stefan Agner
2015-01-13 6:09 ` Linus Walleij
2015-01-12 18:26 ` [PATCH v3 15/21] ARM: exynos4/5: convert pmu wakeup " Marc Zyngier
` (6 subsequent siblings)
20 siblings, 2 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
IMX6 has been (ab)using the gic_arch_extn to provide
wakeup from suspend, and it makes a lot of sense to convert
this code to use stacked domains instead.
This patch does just this, updating the DT files to actually
reflect what the HW provides.
BIG FAT WARNING: because the DTs were so far lying by not
exposing the fact that the GPC block is actually the first
interrupt controller in the chain, kernels with this patch
applied wont have any suspend-resume facility when booted
with old DTs, and old kernels with updated DTs won't even boot.
Tested-by: Stefan Agner <stefan@agner.ch>
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/boot/dts/imx6qdl.dtsi | 7 ++-
arch/arm/boot/dts/imx6sl.dtsi | 5 +-
arch/arm/boot/dts/imx6sx.dtsi | 5 +-
arch/arm/mach-imx/common.h | 1 -
arch/arm/mach-imx/gpc.c | 127 ++++++++++++++++++++++++++++++++--------
arch/arm/mach-imx/mach-imx6q.c | 1 -
arch/arm/mach-imx/mach-imx6sl.c | 1 -
arch/arm/mach-imx/mach-imx6sx.c | 1 -
8 files changed, 117 insertions(+), 31 deletions(-)
diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index 4fc03b7..aff9ded 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -53,6 +53,7 @@
interrupt-controller;
reg = <0x00a01000 0x1000>,
<0x00a00100 0x100>;
+ interrupt-parent = <&intc>;
};
clocks {
@@ -82,7 +83,7 @@
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
- interrupt-parent = <&intc>;
+ interrupt-parent = <&gpc>;
ranges;
dma_apbh: dma-apbh at 00110000 {
@@ -122,6 +123,7 @@
compatible = "arm,cortex-a9-twd-timer";
reg = <0x00a00600 0x20>;
interrupts = <1 13 0xf01>;
+ interrupt-parent = <&intc>;
clocks = <&clks IMX6QDL_CLK_TWD>;
};
@@ -694,8 +696,11 @@
gpc: gpc at 020dc000 {
compatible = "fsl,imx6q-gpc";
reg = <0x020dc000 0x4000>;
+ interrupt-controller;
+ #interrupt-cells = <3>;
interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>,
<0 90 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&intc>;
};
gpr: iomuxc-gpr at 020e0000 {
diff --git a/arch/arm/boot/dts/imx6sl.dtsi b/arch/arm/boot/dts/imx6sl.dtsi
index 36ab8e0..35099b7 100644
--- a/arch/arm/boot/dts/imx6sl.dtsi
+++ b/arch/arm/boot/dts/imx6sl.dtsi
@@ -72,6 +72,7 @@
interrupt-controller;
reg = <0x00a01000 0x1000>,
<0x00a00100 0x100>;
+ interrupt-parent = <&intc>;
};
clocks {
@@ -95,7 +96,7 @@
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
- interrupt-parent = <&intc>;
+ interrupt-parent = <&gpc>;
ranges;
ocram: sram at 00900000 {
@@ -603,7 +604,9 @@
gpc: gpc at 020dc000 {
compatible = "fsl,imx6sl-gpc", "fsl,imx6q-gpc";
reg = <0x020dc000 0x4000>;
+ interrupt-controller;
interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&intc>;
};
gpr: iomuxc-gpr at 020e0000 {
diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
index 7a24fee..c476e67 100644
--- a/arch/arm/boot/dts/imx6sx.dtsi
+++ b/arch/arm/boot/dts/imx6sx.dtsi
@@ -88,6 +88,7 @@
interrupt-controller;
reg = <0x00a01000 0x1000>,
<0x00a00100 0x100>;
+ interrupt-parent = <&intc>;
};
clocks {
@@ -131,7 +132,7 @@
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
- interrupt-parent = <&intc>;
+ interrupt-parent = <&gpc>;
ranges;
pmu {
@@ -700,7 +701,9 @@
gpc: gpc at 020dc000 {
compatible = "fsl,imx6sx-gpc", "fsl,imx6q-gpc";
reg = <0x020dc000 0x4000>;
+ interrupt-controller;
interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-parent = <&intc>;
};
iomuxc: iomuxc at 020e0000 {
diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
index cfcdb62..7052302 100644
--- a/arch/arm/mach-imx/common.h
+++ b/arch/arm/mach-imx/common.h
@@ -102,7 +102,6 @@ static inline void imx_scu_map_io(void) {}
static inline void imx_smp_prepare(void) {}
#endif
void imx_src_init(void);
-void imx_gpc_init(void);
void imx_gpc_pre_suspend(bool arm_power_off);
void imx_gpc_post_resume(void);
void imx_gpc_mask_all(void);
diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
index 5f3602e..240109b 100644
--- a/arch/arm/mach-imx/gpc.c
+++ b/arch/arm/mach-imx/gpc.c
@@ -22,6 +22,7 @@
#define GPC_PGC_CPU_PDN 0x2a0
#define IMR_NUM 4
+#define GPC_MAX_IRQS (IMR_NUM * 32)
static void __iomem *gpc_base;
static u32 gpc_wake_irqs[IMR_NUM];
@@ -56,17 +57,17 @@ void imx_gpc_post_resume(void)
static int imx_gpc_irq_set_wake(struct irq_data *d, unsigned int on)
{
- unsigned int idx = d->hwirq / 32 - 1;
+ unsigned int idx = d->hwirq / 32;
u32 mask;
- /* Sanity check for SPI irq */
- if (d->hwirq < 32)
- return -EINVAL;
-
mask = 1 << d->hwirq % 32;
gpc_wake_irqs[idx] = on ? gpc_wake_irqs[idx] | mask :
gpc_wake_irqs[idx] & ~mask;
+ /*
+ * Do *not* call into the parent, as the GIC doesn't have any
+ * wake-up facility...
+ */
return 0;
}
@@ -96,7 +97,7 @@ void imx_gpc_hwirq_unmask(unsigned int hwirq)
void __iomem *reg;
u32 val;
- reg = gpc_base + GPC_IMR1 + (hwirq / 32 - 1) * 4;
+ reg = gpc_base + GPC_IMR1 + hwirq / 32 * 4;
val = readl_relaxed(reg);
val &= ~(1 << hwirq % 32);
writel_relaxed(val, reg);
@@ -107,7 +108,7 @@ void imx_gpc_hwirq_mask(unsigned int hwirq)
void __iomem *reg;
u32 val;
- reg = gpc_base + GPC_IMR1 + (hwirq / 32 - 1) * 4;
+ reg = gpc_base + GPC_IMR1 + hwirq / 32 * 4;
val = readl_relaxed(reg);
val |= 1 << (hwirq % 32);
writel_relaxed(val, reg);
@@ -115,37 +116,115 @@ void imx_gpc_hwirq_mask(unsigned int hwirq)
static void imx_gpc_irq_unmask(struct irq_data *d)
{
- /* Sanity check for SPI irq */
- if (d->hwirq < 32)
- return;
-
imx_gpc_hwirq_unmask(d->hwirq);
+ irq_chip_unmask_parent(d);
}
static void imx_gpc_irq_mask(struct irq_data *d)
{
- /* Sanity check for SPI irq */
- if (d->hwirq < 32)
- return;
-
imx_gpc_hwirq_mask(d->hwirq);
+ irq_chip_mask_parent(d);
+}
+
+static struct irq_chip imx_gpc_chip = {
+ .name = "GPC",
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_mask = imx_gpc_irq_mask,
+ .irq_unmask = imx_gpc_irq_unmask,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_wake = imx_gpc_irq_set_wake,
+};
+
+static int imx_gpc_domain_xlate(struct irq_domain *domain,
+ struct device_node *controller,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (domain->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
+ return 0;
+}
+
+static int imx_gpc_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct of_phandle_args *args = data;
+ struct of_phandle_args parent_args;
+ irq_hw_number_t hwirq;
+ int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+ if (hwirq >= GPC_MAX_IRQS)
+ return -EINVAL; /* Can't deal with this */
+
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &imx_gpc_chip, NULL);
+
+ parent_args = *args;
+ parent_args.np = domain->parent->of_node;
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args);
}
-void __init imx_gpc_init(void)
+static struct irq_domain_ops imx_gpc_domain_ops = {
+ .xlate = imx_gpc_domain_xlate,
+ .alloc = imx_gpc_domain_alloc,
+ .free = irq_domain_free_irqs_common,
+};
+
+static int __init imx_gpc_init(struct device_node *node,
+ struct device_node *parent)
{
- struct device_node *np;
+ struct irq_domain *parent_domain, *domain;
int i;
- np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-gpc");
- gpc_base = of_iomap(np, 0);
- WARN_ON(!gpc_base);
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ gpc_base = of_iomap(node, 0);
+ if (WARN_ON(!gpc_base))
+ return -ENOMEM;
+
+ domain = irq_domain_add_hierarchy(parent_domain, 0, GPC_MAX_IRQS,
+ node, &imx_gpc_domain_ops,
+ NULL);
+ if (!domain) {
+ iounmap(gpc_base);
+ return -ENOMEM;
+ }
/* Initially mask all interrupts */
for (i = 0; i < IMR_NUM; i++)
writel_relaxed(~0, gpc_base + GPC_IMR1 + i * 4);
- /* Register GPC as the secondary interrupt controller behind GIC */
- gic_arch_extn.irq_mask = imx_gpc_irq_mask;
- gic_arch_extn.irq_unmask = imx_gpc_irq_unmask;
- gic_arch_extn.irq_set_wake = imx_gpc_irq_set_wake;
+ return 0;
}
+
+/*
+ * We cannot use the IRQCHIP_DECLARE macro that lives in
+ * drivers/irqchip, so we're forced to roll our own. Not very nice.
+ */
+OF_DECLARE_2(irqchip, imx_gpc, "fsl,imx6q-gpc", imx_gpc_init);
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
index 5057d61..bbe6ff8 100644
--- a/arch/arm/mach-imx/mach-imx6q.c
+++ b/arch/arm/mach-imx/mach-imx6q.c
@@ -390,7 +390,6 @@ static void __init imx6q_init_irq(void)
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();
- imx_gpc_init();
irqchip_init();
}
diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
index 24bfaaf..d39c274 100644
--- a/arch/arm/mach-imx/mach-imx6sl.c
+++ b/arch/arm/mach-imx/mach-imx6sl.c
@@ -64,7 +64,6 @@ static void __init imx6sl_init_irq(void)
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();
- imx_gpc_init();
irqchip_init();
}
diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
index 7a96c65..72fa22d 100644
--- a/arch/arm/mach-imx/mach-imx6sx.c
+++ b/arch/arm/mach-imx/mach-imx6sx.c
@@ -84,7 +84,6 @@ static void __init imx6sx_init_irq(void)
imx_init_revision_from_anatop();
imx_init_l2cache();
imx_src_init();
- imx_gpc_init();
irqchip_init();
}
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 14/21] ARM: imx6: convert GPC to stacked domains
2015-01-12 18:26 ` [PATCH v3 14/21] ARM: imx6: convert GPC " Marc Zyngier
@ 2015-01-12 19:00 ` Stefan Agner
2015-01-13 18:34 ` Marc Zyngier
2015-01-13 6:09 ` Linus Walleij
1 sibling, 1 reply; 36+ messages in thread
From: Stefan Agner @ 2015-01-12 19:00 UTC (permalink / raw)
To: linux-arm-kernel
Hi Marc,
On 2015-01-12 19:26, Marc Zyngier wrote:
> IMX6 has been (ab)using the gic_arch_extn to provide
> wakeup from suspend, and it makes a lot of sense to convert
> this code to use stacked domains instead.
>
> This patch does just this, updating the DT files to actually
> reflect what the HW provides.
>
> BIG FAT WARNING: because the DTs were so far lying by not
> exposing the fact that the GPC block is actually the first
> interrupt controller in the chain, kernels with this patch
> applied wont have any suspend-resume facility when booted
> with old DTs, and old kernels with updated DTs won't even boot.
>
> Tested-by: Stefan Agner <stefan@agner.ch>
> Acked-by: Stefan Agner <stefan@agner.ch>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
> arch/arm/boot/dts/imx6qdl.dtsi | 7 ++-
> arch/arm/boot/dts/imx6sl.dtsi | 5 +-
> arch/arm/boot/dts/imx6sx.dtsi | 5 +-
> arch/arm/mach-imx/common.h | 1 -
> arch/arm/mach-imx/gpc.c | 127 ++++++++++++++++++++++++++++++++--------
> arch/arm/mach-imx/mach-imx6q.c | 1 -
> arch/arm/mach-imx/mach-imx6sl.c | 1 -
> arch/arm/mach-imx/mach-imx6sx.c | 1 -
> 8 files changed, 117 insertions(+), 31 deletions(-)
>
> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
> index 4fc03b7..aff9ded 100644
> --- a/arch/arm/boot/dts/imx6qdl.dtsi
> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
> @@ -53,6 +53,7 @@
> interrupt-controller;
> reg = <0x00a01000 0x1000>,
> <0x00a00100 0x100>;
> + interrupt-parent = <&intc>;
> };
>
> clocks {
> @@ -82,7 +83,7 @@
> #address-cells = <1>;
> #size-cells = <1>;
> compatible = "simple-bus";
> - interrupt-parent = <&intc>;
> + interrupt-parent = <&gpc>;
> ranges;
>
> dma_apbh: dma-apbh at 00110000 {
> @@ -122,6 +123,7 @@
> compatible = "arm,cortex-a9-twd-timer";
> reg = <0x00a00600 0x20>;
> interrupts = <1 13 0xf01>;
> + interrupt-parent = <&intc>;
> clocks = <&clks IMX6QDL_CLK_TWD>;
> };
>
> @@ -694,8 +696,11 @@
> gpc: gpc at 020dc000 {
> compatible = "fsl,imx6q-gpc";
> reg = <0x020dc000 0x4000>;
> + interrupt-controller;
> + #interrupt-cells = <3>;
> interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>,
> <0 90 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-parent = <&intc>;
> };
>
> gpr: iomuxc-gpr at 020e0000 {
> diff --git a/arch/arm/boot/dts/imx6sl.dtsi b/arch/arm/boot/dts/imx6sl.dtsi
> index 36ab8e0..35099b7 100644
> --- a/arch/arm/boot/dts/imx6sl.dtsi
> +++ b/arch/arm/boot/dts/imx6sl.dtsi
> @@ -72,6 +72,7 @@
> interrupt-controller;
> reg = <0x00a01000 0x1000>,
> <0x00a00100 0x100>;
> + interrupt-parent = <&intc>;
> };
>
> clocks {
> @@ -95,7 +96,7 @@
> #address-cells = <1>;
> #size-cells = <1>;
> compatible = "simple-bus";
> - interrupt-parent = <&intc>;
> + interrupt-parent = <&gpc>;
> ranges;
>
> ocram: sram at 00900000 {
> @@ -603,7 +604,9 @@
> gpc: gpc at 020dc000 {
> compatible = "fsl,imx6sl-gpc", "fsl,imx6q-gpc";
> reg = <0x020dc000 0x4000>;
> + interrupt-controller;
GPC is in three base device trees, and missing in all of them. So the
first is fixed
this one...
> interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-parent = <&intc>;
> };
>
> gpr: iomuxc-gpr at 020e0000 {
> diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
> index 7a24fee..c476e67 100644
> --- a/arch/arm/boot/dts/imx6sx.dtsi
> +++ b/arch/arm/boot/dts/imx6sx.dtsi
> @@ -88,6 +88,7 @@
> interrupt-controller;
> reg = <0x00a01000 0x1000>,
> <0x00a00100 0x100>;
> + interrupt-parent = <&intc>;
> };
>
> clocks {
> @@ -131,7 +132,7 @@
> #address-cells = <1>;
> #size-cells = <1>;
> compatible = "simple-bus";
> - interrupt-parent = <&intc>;
> + interrupt-parent = <&gpc>;
> ranges;
>
> pmu {
> @@ -700,7 +701,9 @@
> gpc: gpc at 020dc000 {
> compatible = "fsl,imx6sx-gpc", "fsl,imx6q-gpc";
> reg = <0x020dc000 0x4000>;
> + interrupt-controller;
... and this one is still missing.
Sorry I did not see that the first review.
--
Stefan
> interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-parent = <&intc>;
> };
>
> iomuxc: iomuxc at 020e0000 {
> diff --git a/arch/arm/mach-imx/common.h b/arch/arm/mach-imx/common.h
> index cfcdb62..7052302 100644
> --- a/arch/arm/mach-imx/common.h
> +++ b/arch/arm/mach-imx/common.h
> @@ -102,7 +102,6 @@ static inline void imx_scu_map_io(void) {}
> static inline void imx_smp_prepare(void) {}
> #endif
> void imx_src_init(void);
> -void imx_gpc_init(void);
> void imx_gpc_pre_suspend(bool arm_power_off);
> void imx_gpc_post_resume(void);
> void imx_gpc_mask_all(void);
> diff --git a/arch/arm/mach-imx/gpc.c b/arch/arm/mach-imx/gpc.c
> index 5f3602e..240109b 100644
> --- a/arch/arm/mach-imx/gpc.c
> +++ b/arch/arm/mach-imx/gpc.c
> @@ -22,6 +22,7 @@
> #define GPC_PGC_CPU_PDN 0x2a0
>
> #define IMR_NUM 4
> +#define GPC_MAX_IRQS (IMR_NUM * 32)
>
> static void __iomem *gpc_base;
> static u32 gpc_wake_irqs[IMR_NUM];
> @@ -56,17 +57,17 @@ void imx_gpc_post_resume(void)
>
> static int imx_gpc_irq_set_wake(struct irq_data *d, unsigned int on)
> {
> - unsigned int idx = d->hwirq / 32 - 1;
> + unsigned int idx = d->hwirq / 32;
> u32 mask;
>
> - /* Sanity check for SPI irq */
> - if (d->hwirq < 32)
> - return -EINVAL;
> -
> mask = 1 << d->hwirq % 32;
> gpc_wake_irqs[idx] = on ? gpc_wake_irqs[idx] | mask :
> gpc_wake_irqs[idx] & ~mask;
>
> + /*
> + * Do *not* call into the parent, as the GIC doesn't have any
> + * wake-up facility...
> + */
> return 0;
> }
>
> @@ -96,7 +97,7 @@ void imx_gpc_hwirq_unmask(unsigned int hwirq)
> void __iomem *reg;
> u32 val;
>
> - reg = gpc_base + GPC_IMR1 + (hwirq / 32 - 1) * 4;
> + reg = gpc_base + GPC_IMR1 + hwirq / 32 * 4;
> val = readl_relaxed(reg);
> val &= ~(1 << hwirq % 32);
> writel_relaxed(val, reg);
> @@ -107,7 +108,7 @@ void imx_gpc_hwirq_mask(unsigned int hwirq)
> void __iomem *reg;
> u32 val;
>
> - reg = gpc_base + GPC_IMR1 + (hwirq / 32 - 1) * 4;
> + reg = gpc_base + GPC_IMR1 + hwirq / 32 * 4;
> val = readl_relaxed(reg);
> val |= 1 << (hwirq % 32);
> writel_relaxed(val, reg);
> @@ -115,37 +116,115 @@ void imx_gpc_hwirq_mask(unsigned int hwirq)
>
> static void imx_gpc_irq_unmask(struct irq_data *d)
> {
> - /* Sanity check for SPI irq */
> - if (d->hwirq < 32)
> - return;
> -
> imx_gpc_hwirq_unmask(d->hwirq);
> + irq_chip_unmask_parent(d);
> }
>
> static void imx_gpc_irq_mask(struct irq_data *d)
> {
> - /* Sanity check for SPI irq */
> - if (d->hwirq < 32)
> - return;
> -
> imx_gpc_hwirq_mask(d->hwirq);
> + irq_chip_mask_parent(d);
> +}
> +
> +static struct irq_chip imx_gpc_chip = {
> + .name = "GPC",
> + .irq_eoi = irq_chip_eoi_parent,
> + .irq_mask = imx_gpc_irq_mask,
> + .irq_unmask = imx_gpc_irq_unmask,
> + .irq_retrigger = irq_chip_retrigger_hierarchy,
> + .irq_set_wake = imx_gpc_irq_set_wake,
> +};
> +
> +static int imx_gpc_domain_xlate(struct irq_domain *domain,
> + struct device_node *controller,
> + const u32 *intspec,
> + unsigned int intsize,
> + unsigned long *out_hwirq,
> + unsigned int *out_type)
> +{
> + if (domain->of_node != controller)
> + return -EINVAL; /* Shouldn't happen, really... */
> + if (intsize != 3)
> + return -EINVAL; /* Not GIC compliant */
> + if (intspec[0] != 0)
> + return -EINVAL; /* No PPI should point to this domain */
> +
> + *out_hwirq = intspec[1];
> + *out_type = intspec[2];
> + return 0;
> +}
> +
> +static int imx_gpc_domain_alloc(struct irq_domain *domain,
> + unsigned int virq,
> + unsigned int nr_irqs, void *data)
> +{
> + struct of_phandle_args *args = data;
> + struct of_phandle_args parent_args;
> + irq_hw_number_t hwirq;
> + int i;
> +
> + if (args->args_count != 3)
> + return -EINVAL; /* Not GIC compliant */
> + if (args->args[0] != 0)
> + return -EINVAL; /* No PPI should point to this domain */
> +
> + hwirq = args->args[1];
> + if (hwirq >= GPC_MAX_IRQS)
> + return -EINVAL; /* Can't deal with this */
> +
> + for (i = 0; i < nr_irqs; i++)
> + irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
> + &imx_gpc_chip, NULL);
> +
> + parent_args = *args;
> + parent_args.np = domain->parent->of_node;
> + return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args);
> }
>
> -void __init imx_gpc_init(void)
> +static struct irq_domain_ops imx_gpc_domain_ops = {
> + .xlate = imx_gpc_domain_xlate,
> + .alloc = imx_gpc_domain_alloc,
> + .free = irq_domain_free_irqs_common,
> +};
> +
> +static int __init imx_gpc_init(struct device_node *node,
> + struct device_node *parent)
> {
> - struct device_node *np;
> + struct irq_domain *parent_domain, *domain;
> int i;
>
> - np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-gpc");
> - gpc_base = of_iomap(np, 0);
> - WARN_ON(!gpc_base);
> + if (!parent) {
> + pr_err("%s: no parent, giving up\n", node->full_name);
> + return -ENODEV;
> + }
> +
> + parent_domain = irq_find_host(parent);
> + if (!parent_domain) {
> + pr_err("%s: unable to obtain parent domain\n", node->full_name);
> + return -ENXIO;
> + }
> +
> + gpc_base = of_iomap(node, 0);
> + if (WARN_ON(!gpc_base))
> + return -ENOMEM;
> +
> + domain = irq_domain_add_hierarchy(parent_domain, 0, GPC_MAX_IRQS,
> + node, &imx_gpc_domain_ops,
> + NULL);
> + if (!domain) {
> + iounmap(gpc_base);
> + return -ENOMEM;
> + }
>
> /* Initially mask all interrupts */
> for (i = 0; i < IMR_NUM; i++)
> writel_relaxed(~0, gpc_base + GPC_IMR1 + i * 4);
>
> - /* Register GPC as the secondary interrupt controller behind GIC */
> - gic_arch_extn.irq_mask = imx_gpc_irq_mask;
> - gic_arch_extn.irq_unmask = imx_gpc_irq_unmask;
> - gic_arch_extn.irq_set_wake = imx_gpc_irq_set_wake;
> + return 0;
> }
> +
> +/*
> + * We cannot use the IRQCHIP_DECLARE macro that lives in
> + * drivers/irqchip, so we're forced to roll our own. Not very nice.
> + */
> +OF_DECLARE_2(irqchip, imx_gpc, "fsl,imx6q-gpc", imx_gpc_init);
> diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c
> index 5057d61..bbe6ff8 100644
> --- a/arch/arm/mach-imx/mach-imx6q.c
> +++ b/arch/arm/mach-imx/mach-imx6q.c
> @@ -390,7 +390,6 @@ static void __init imx6q_init_irq(void)
> imx_init_revision_from_anatop();
> imx_init_l2cache();
> imx_src_init();
> - imx_gpc_init();
> irqchip_init();
> }
>
> diff --git a/arch/arm/mach-imx/mach-imx6sl.c b/arch/arm/mach-imx/mach-imx6sl.c
> index 24bfaaf..d39c274 100644
> --- a/arch/arm/mach-imx/mach-imx6sl.c
> +++ b/arch/arm/mach-imx/mach-imx6sl.c
> @@ -64,7 +64,6 @@ static void __init imx6sl_init_irq(void)
> imx_init_revision_from_anatop();
> imx_init_l2cache();
> imx_src_init();
> - imx_gpc_init();
> irqchip_init();
> }
>
> diff --git a/arch/arm/mach-imx/mach-imx6sx.c b/arch/arm/mach-imx/mach-imx6sx.c
> index 7a96c65..72fa22d 100644
> --- a/arch/arm/mach-imx/mach-imx6sx.c
> +++ b/arch/arm/mach-imx/mach-imx6sx.c
> @@ -84,7 +84,6 @@ static void __init imx6sx_init_irq(void)
> imx_init_revision_from_anatop();
> imx_init_l2cache();
> imx_src_init();
> - imx_gpc_init();
> irqchip_init();
> }
^ permalink raw reply [flat|nested] 36+ messages in thread* [PATCH v3 14/21] ARM: imx6: convert GPC to stacked domains
2015-01-12 19:00 ` Stefan Agner
@ 2015-01-13 18:34 ` Marc Zyngier
0 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-13 18:34 UTC (permalink / raw)
To: linux-arm-kernel
On 12/01/15 19:00, Stefan Agner wrote:
> Hi Marc,
>
> On 2015-01-12 19:26, Marc Zyngier wrote:
>> IMX6 has been (ab)using the gic_arch_extn to provide
>> wakeup from suspend, and it makes a lot of sense to convert
>> this code to use stacked domains instead.
>>
>> This patch does just this, updating the DT files to actually
>> reflect what the HW provides.
>>
>> BIG FAT WARNING: because the DTs were so far lying by not
>> exposing the fact that the GPC block is actually the first
>> interrupt controller in the chain, kernels with this patch
>> applied wont have any suspend-resume facility when booted
>> with old DTs, and old kernels with updated DTs won't even boot.
>>
>> Tested-by: Stefan Agner <stefan@agner.ch>
>> Acked-by: Stefan Agner <stefan@agner.ch>
>> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>> ---
>> arch/arm/boot/dts/imx6qdl.dtsi | 7 ++-
>> arch/arm/boot/dts/imx6sl.dtsi | 5 +-
>> arch/arm/boot/dts/imx6sx.dtsi | 5 +-
>> arch/arm/mach-imx/common.h | 1 -
>> arch/arm/mach-imx/gpc.c | 127 ++++++++++++++++++++++++++++++++--------
>> arch/arm/mach-imx/mach-imx6q.c | 1 -
>> arch/arm/mach-imx/mach-imx6sl.c | 1 -
>> arch/arm/mach-imx/mach-imx6sx.c | 1 -
>> 8 files changed, 117 insertions(+), 31 deletions(-)
>>
>> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
>> index 4fc03b7..aff9ded 100644
>> --- a/arch/arm/boot/dts/imx6qdl.dtsi
>> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
>> @@ -53,6 +53,7 @@
>> interrupt-controller;
>> reg = <0x00a01000 0x1000>,
>> <0x00a00100 0x100>;
>> + interrupt-parent = <&intc>;
>> };
>>
>> clocks {
>> @@ -82,7 +83,7 @@
>> #address-cells = <1>;
>> #size-cells = <1>;
>> compatible = "simple-bus";
>> - interrupt-parent = <&intc>;
>> + interrupt-parent = <&gpc>;
>> ranges;
>>
>> dma_apbh: dma-apbh at 00110000 {
>> @@ -122,6 +123,7 @@
>> compatible = "arm,cortex-a9-twd-timer";
>> reg = <0x00a00600 0x20>;
>> interrupts = <1 13 0xf01>;
>> + interrupt-parent = <&intc>;
>> clocks = <&clks IMX6QDL_CLK_TWD>;
>> };
>>
>> @@ -694,8 +696,11 @@
>> gpc: gpc at 020dc000 {
>> compatible = "fsl,imx6q-gpc";
>> reg = <0x020dc000 0x4000>;
>> + interrupt-controller;
>> + #interrupt-cells = <3>;
>> interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>,
>> <0 90 IRQ_TYPE_LEVEL_HIGH>;
>> + interrupt-parent = <&intc>;
>> };
>>
>> gpr: iomuxc-gpr at 020e0000 {
>> diff --git a/arch/arm/boot/dts/imx6sl.dtsi b/arch/arm/boot/dts/imx6sl.dtsi
>> index 36ab8e0..35099b7 100644
>> --- a/arch/arm/boot/dts/imx6sl.dtsi
>> +++ b/arch/arm/boot/dts/imx6sl.dtsi
>> @@ -72,6 +72,7 @@
>> interrupt-controller;
>> reg = <0x00a01000 0x1000>,
>> <0x00a00100 0x100>;
>> + interrupt-parent = <&intc>;
>> };
>>
>> clocks {
>> @@ -95,7 +96,7 @@
>> #address-cells = <1>;
>> #size-cells = <1>;
>> compatible = "simple-bus";
>> - interrupt-parent = <&intc>;
>> + interrupt-parent = <&gpc>;
>> ranges;
>>
>> ocram: sram at 00900000 {
>> @@ -603,7 +604,9 @@
>> gpc: gpc at 020dc000 {
>> compatible = "fsl,imx6sl-gpc", "fsl,imx6q-gpc";
>> reg = <0x020dc000 0x4000>;
>> + interrupt-controller;
>
> GPC is in three base device trees, and missing in all of them. So the
> first is fixed
>
> this one...
>
>> interrupts = <0 89 IRQ_TYPE_LEVEL_HIGH>;
>> + interrupt-parent = <&intc>;
>> };
>>
>> gpr: iomuxc-gpr at 020e0000 {
>> diff --git a/arch/arm/boot/dts/imx6sx.dtsi b/arch/arm/boot/dts/imx6sx.dtsi
>> index 7a24fee..c476e67 100644
>> --- a/arch/arm/boot/dts/imx6sx.dtsi
>> +++ b/arch/arm/boot/dts/imx6sx.dtsi
>> @@ -88,6 +88,7 @@
>> interrupt-controller;
>> reg = <0x00a01000 0x1000>,
>> <0x00a00100 0x100>;
>> + interrupt-parent = <&intc>;
>> };
>>
>> clocks {
>> @@ -131,7 +132,7 @@
>> #address-cells = <1>;
>> #size-cells = <1>;
>> compatible = "simple-bus";
>> - interrupt-parent = <&intc>;
>> + interrupt-parent = <&gpc>;
>> ranges;
>>
>> pmu {
>> @@ -700,7 +701,9 @@
>> gpc: gpc at 020dc000 {
>> compatible = "fsl,imx6sx-gpc", "fsl,imx6q-gpc";
>> reg = <0x020dc000 0x4000>;
>> + interrupt-controller;
>
>
> ... and this one is still missing.
>
> Sorry I did not see that the first review.
I thought I had them fixed on Sunday, but it looks like I've dropped the
fixup when rebasing. Oh well.
Thanks for the heads up, I'll squash that into the existing patch.
M.
--
Jazz is not dead. It just smells funny...
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 14/21] ARM: imx6: convert GPC to stacked domains
2015-01-12 18:26 ` [PATCH v3 14/21] ARM: imx6: convert GPC " Marc Zyngier
2015-01-12 19:00 ` Stefan Agner
@ 2015-01-13 6:09 ` Linus Walleij
2015-01-13 18:36 ` Marc Zyngier
1 sibling, 1 reply; 36+ messages in thread
From: Linus Walleij @ 2015-01-13 6:09 UTC (permalink / raw)
To: linux-arm-kernel
On Mon, Jan 12, 2015 at 7:26 PM, Marc Zyngier <marc.zyngier@arm.com> wrote:
> IMX6 has been (ab)using the gic_arch_extn to provide
> wakeup from suspend, and it makes a lot of sense to convert
> this code to use stacked domains instead.
>
> This patch does just this, updating the DT files to actually
> reflect what the HW provides.
>
> BIG FAT WARNING: because the DTs were so far lying by not
> exposing the fact that the GPC block is actually the first
> interrupt controller in the chain, kernels with this patch
> applied wont have any suspend-resume facility when booted
> with old DTs, and old kernels with updated DTs won't even boot.
>
> Tested-by: Stefan Agner <stefan@agner.ch>
> Acked-by: Stefan Agner <stefan@agner.ch>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
(...)
> +static int imx_gpc_domain_alloc(struct irq_domain *domain,
> + unsigned int virq,
Nutcase nitpick on this nice patch series: every time I see "virq" my
OCD triggers, as I think the "v" in "virq" stand for virtual. These irqs
are no more virtual than any other Linux irq numbers, hwirq is
more to the point.
I just refer to these as "irq" (sans "v") in any code I write.
Yours,
Linus Walleij
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 14/21] ARM: imx6: convert GPC to stacked domains
2015-01-13 6:09 ` Linus Walleij
@ 2015-01-13 18:36 ` Marc Zyngier
0 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-13 18:36 UTC (permalink / raw)
To: linux-arm-kernel
On 13/01/15 06:09, Linus Walleij wrote:
Hi Linus,
> On Mon, Jan 12, 2015 at 7:26 PM, Marc Zyngier <marc.zyngier@arm.com> wrote:
>
>> IMX6 has been (ab)using the gic_arch_extn to provide
>> wakeup from suspend, and it makes a lot of sense to convert
>> this code to use stacked domains instead.
>>
>> This patch does just this, updating the DT files to actually
>> reflect what the HW provides.
>>
>> BIG FAT WARNING: because the DTs were so far lying by not
>> exposing the fact that the GPC block is actually the first
>> interrupt controller in the chain, kernels with this patch
>> applied wont have any suspend-resume facility when booted
>> with old DTs, and old kernels with updated DTs won't even boot.
>>
>> Tested-by: Stefan Agner <stefan@agner.ch>
>> Acked-by: Stefan Agner <stefan@agner.ch>
>> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>
> (...)
>
>> +static int imx_gpc_domain_alloc(struct irq_domain *domain,
>> + unsigned int virq,
>
> Nutcase nitpick on this nice patch series: every time I see "virq" my
> OCD triggers, as I think the "v" in "virq" stand for virtual. These irqs
> are no more virtual than any other Linux irq numbers, hwirq is
> more to the point.
>
> I just refer to these as "irq" (sans "v") in any code I write.
That's fair enough. I'll update that as I fix some other nits.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 15/21] ARM: exynos4/5: convert pmu wakeup to stacked domains
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (13 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 14/21] ARM: imx6: convert GPC " Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-15 6:41 ` [v3,15/21] " Pankaj Dubey
2015-01-12 18:26 ` [PATCH v3 16/21] DT: exynos: update PMU binding Marc Zyngier
` (5 subsequent siblings)
20 siblings, 1 reply; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Exynos has been (ab)using the gic_arch_extn to provide
wakeup from suspend, and it makes a lot of sense to convert
this code to use stacked domains instead.
This patch does just this, updating the DT files to actually
reflect what the HW provides.
BIG FAT WARNING: because the DTs were so far lying by not
exposing the fact that the PMU block is actually the first
interrupt controller in the chain for RTC, kernels with this patch
applied wont have any suspend-resume facility when booted
with old DTs, and old kernels with updated DTs may not even boot.
Also, I stronly suspect that there is more than two wake-up
interrupts on these platforms, but I leave it to the maintainers
to fix their mess.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/boot/dts/exynos4.dtsi | 3 +
arch/arm/boot/dts/exynos5250.dtsi | 3 +
arch/arm/boot/dts/exynos5420.dtsi | 3 +
arch/arm/mach-exynos/exynos.c | 14 ++---
arch/arm/mach-exynos/suspend.c | 122 ++++++++++++++++++++++++++++++++++----
5 files changed, 126 insertions(+), 19 deletions(-)
diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index b8168f1..adc189f 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -141,6 +141,8 @@
pmu_system_controller: system-controller at 10020000 {
compatible = "samsung,exynos4210-pmu", "syscon";
reg = <0x10020000 0x4000>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
};
dsi_0: dsi at 11C80000 {
@@ -253,6 +255,7 @@
rtc at 10070000 {
compatible = "samsung,s3c6410-rtc";
reg = <0x10070000 0x100>;
+ interrupt-parent = <&pmu_system_controller>;
interrupts = <0 44 0>, <0 45 0>;
clocks = <&clock CLK_RTC>;
clock-names = "rtc";
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index 0a229fc..c31007c 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -194,6 +194,8 @@
clock-names = "clkout16";
clocks = <&clock CLK_FIN_PLL>;
#clock-cells = <1>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
};
sysreg_system_controller: syscon at 10050000 {
@@ -230,6 +232,7 @@
rtc: rtc at 101E0000 {
clocks = <&clock CLK_RTC>;
clock-names = "rtc";
+ interrupt-parent = <&pmu_system_controller>;
status = "disabled";
};
diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 517e50f..1946c76c 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -309,6 +309,7 @@
rtc: rtc at 101E0000 {
clocks = <&clock CLK_RTC>;
clock-names = "rtc";
+ interrupt-parent = <&pmu_system_controller>;
status = "disabled";
};
@@ -748,6 +749,8 @@
clock-names = "clkout16";
clocks = <&clock CLK_FIN_PLL>;
#clock-cells = <1>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
};
sysreg_system_controller: syscon at 10050000 {
diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index c13d083..e417fdc 100644
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -175,16 +175,15 @@ static void __init exynos_init_io(void)
exynos_map_io();
}
+/*
+ * Apparently, these SoCs are not able to wake-up from suspend using
+ * the PMU. Too bad. Should they suddenly become capable of such a
+ * feat, the matches below should be moved to suspend.c.
+ */
static const struct of_device_id exynos_dt_pmu_match[] = {
{ .compatible = "samsung,exynos3250-pmu" },
- { .compatible = "samsung,exynos4210-pmu" },
- { .compatible = "samsung,exynos4212-pmu" },
- { .compatible = "samsung,exynos4412-pmu" },
- { .compatible = "samsung,exynos4415-pmu" },
- { .compatible = "samsung,exynos5250-pmu" },
{ .compatible = "samsung,exynos5260-pmu" },
{ .compatible = "samsung,exynos5410-pmu" },
- { .compatible = "samsung,exynos5420-pmu" },
{ /*sentinel*/ },
};
@@ -195,9 +194,6 @@ static void exynos_map_pmu(void)
np = of_find_matching_node(NULL, exynos_dt_pmu_match);
if (np)
pmu_base_addr = of_iomap(np, 0);
-
- if (!pmu_base_addr)
- panic("failed to find exynos pmu register\n");
}
static void __init exynos_init_irq(void)
diff --git a/arch/arm/mach-exynos/suspend.c b/arch/arm/mach-exynos/suspend.c
index f8e7dcd..b325ecd 100644
--- a/arch/arm/mach-exynos/suspend.c
+++ b/arch/arm/mach-exynos/suspend.c
@@ -18,7 +18,9 @@
#include <linux/syscore_ops.h>
#include <linux/cpu_pm.h>
#include <linux/io.h>
-#include <linux/irqchip/arm-gic.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of_address.h>
#include <linux/err.h>
#include <linux/regulator/machine.h>
@@ -44,8 +46,8 @@
#define EXYNOS5420_CPU_STATE 0x28
/**
- * struct exynos_wkup_irq - Exynos GIC to PMU IRQ mapping
- * @hwirq: Hardware IRQ signal of the GIC
+ * struct exynos_wkup_irq - PMU IRQ to mask mapping
+ * @hwirq: Hardware IRQ signal of the PMU
* @mask: Mask in PMU wake-up mask register
*/
struct exynos_wkup_irq {
@@ -92,14 +94,14 @@ static unsigned int exynos_pmu_spare3;
static u32 exynos_irqwake_intmask = 0xffffffff;
static const struct exynos_wkup_irq exynos4_wkup_irq[] = {
- { 76, BIT(1) }, /* RTC alarm */
- { 77, BIT(2) }, /* RTC tick */
+ { 44, BIT(1) }, /* RTC alarm */
+ { 45, BIT(2) }, /* RTC tick */
{ /* sentinel */ },
};
static const struct exynos_wkup_irq exynos5250_wkup_irq[] = {
- { 75, BIT(1) }, /* RTC alarm */
- { 76, BIT(2) }, /* RTC tick */
+ { 43, BIT(1) }, /* RTC alarm */
+ { 44, BIT(2) }, /* RTC tick */
{ /* sentinel */ },
};
@@ -153,6 +155,109 @@ static int exynos_irq_set_wake(struct irq_data *data, unsigned int state)
return -ENOENT;
}
+static struct irq_chip exynos_pmu_chip = {
+ .name = "PMU",
+ .irq_eoi = irq_chip_eoi_parent,
+ .irq_mask = irq_chip_mask_parent,
+ .irq_unmask = irq_chip_unmask_parent,
+ .irq_retrigger = irq_chip_retrigger_hierarchy,
+ .irq_set_wake = exynos_irq_set_wake,
+};
+
+static int exynos_pmu_domain_xlate(struct irq_domain *domain,
+ struct device_node *controller,
+ const u32 *intspec,
+ unsigned int intsize,
+ unsigned long *out_hwirq,
+ unsigned int *out_type)
+{
+ if (domain->of_node != controller)
+ return -EINVAL; /* Shouldn't happen, really... */
+ if (intsize != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (intspec[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ *out_hwirq = intspec[1];
+ *out_type = intspec[2];
+ return 0;
+}
+
+static int exynos_pmu_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *data)
+{
+ struct of_phandle_args *args = data;
+ struct of_phandle_args parent_args;
+ irq_hw_number_t hwirq;
+ int i;
+
+ if (args->args_count != 3)
+ return -EINVAL; /* Not GIC compliant */
+ if (args->args[0] != 0)
+ return -EINVAL; /* No PPI should point to this domain */
+
+ hwirq = args->args[1];
+
+ for (i = 0; i < nr_irqs; i++)
+ irq_domain_set_hwirq_and_chip(domain, virq + i, hwirq + i,
+ &exynos_pmu_chip, NULL);
+
+ parent_args = *args;
+ parent_args.np = domain->parent->of_node;
+ return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, &parent_args);
+}
+
+static struct irq_domain_ops exynos_pmu_domain_ops = {
+ .xlate = exynos_pmu_domain_xlate,
+ .alloc = exynos_pmu_domain_alloc,
+ .free = irq_domain_free_irqs_common,
+};
+
+static int __init exynos_pmu_irq_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct irq_domain *parent_domain, *domain;
+
+ if (!parent) {
+ pr_err("%s: no parent, giving up\n", node->full_name);
+ return -ENODEV;
+ }
+
+ parent_domain = irq_find_host(parent);
+ if (!parent_domain) {
+ pr_err("%s: unable to obtain parent domain\n", node->full_name);
+ return -ENXIO;
+ }
+
+ pmu_base_addr = of_iomap(node, 0);
+
+ if (!pmu_base_addr) {
+ pr_err("%s: failed to find exynos pmu register\n",
+ node->full_name);
+ return -ENOMEM;
+ }
+
+ domain = irq_domain_add_hierarchy(parent_domain, 0, 0,
+ node, &exynos_pmu_domain_ops,
+ NULL);
+ if (!domain) {
+ iounmap(pmu_base_addr);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+#define EXYNOS_PMU_IRQ(symbol, name) OF_DECLARE_2(irqchip, symbol, name, exynos_pmu_irq_init)
+
+EXYNOS_PMU_IRQ(exynos4210_pmu_irq, "samsung,exynos4210-pmu");
+EXYNOS_PMU_IRQ(exynos4212_pmu_irq, "samsung,exynos4212-pmu");
+EXYNOS_PMU_IRQ(exynos4412_pmu_irq, "samsung,exynos4412-pmu");
+EXYNOS_PMU_IRQ(exynos4415_pmu_irq, "samsung,exynos4415-pmu");
+EXYNOS_PMU_IRQ(exynos5250_pmu_irq, "samsung,exynos5250-pmu");
+EXYNOS_PMU_IRQ(exynos5420_pmu_irq, "samsung,exynos5420-pmu");
+
static int exynos_cpu_do_idle(void)
{
/* issue the standby signal into the pm unit. */
@@ -550,9 +655,6 @@ void __init exynos_pm_init(void)
}
pm_data = (struct exynos_pm_data *) match->data;
- /* Platform-specific GIC callback */
- gic_arch_extn.irq_set_wake = exynos_irq_set_wake;
-
/* All wakeup disable */
tmp = pmu_raw_readl(S5P_WAKEUP_MASK);
tmp |= pm_data->wake_disable_mask;
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [v3,15/21] ARM: exynos4/5: convert pmu wakeup to stacked domains
2015-01-12 18:26 ` [PATCH v3 15/21] ARM: exynos4/5: convert pmu wakeup " Marc Zyngier
@ 2015-01-15 6:41 ` Pankaj Dubey
2015-01-16 19:22 ` Marc Zyngier
0 siblings, 1 reply; 36+ messages in thread
From: Pankaj Dubey @ 2015-01-15 6:41 UTC (permalink / raw)
To: linux-arm-kernel
+CC: Thomas Abraham <thomas.ab@samsung.com>
Hi Mark,
On Monday 12 January 2015 11:56 PM, Marc Zyngier wrote:
> Exynos has been (ab)using the gic_arch_extn to provide
> wakeup from suspend, and it makes a lot of sense to convert
> this code to use stacked domains instead.
>
> This patch does just this, updating the DT files to actually
> reflect what the HW provides.
>
> BIG FAT WARNING: because the DTs were so far lying by not
> exposing the fact that the PMU block is actually the first
> interrupt controller in the chain for RTC, kernels with this patch
> applied wont have any suspend-resume facility when booted
> with old DTs, and old kernels with updated DTs may not even boot.
>
> Also, I stronly suspect that there is more than two wake-up
> interrupts on these platforms, but I leave it to the maintainers
> to fix their mess.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>
I tested this series on Exynos5250, using kgene/for-next and
linux-next/next-20150114, but S2R failed on Exynos5250 based SMDK board.
Following is the log I got on SMDK5250 board, (note I have added some
debugging log to know what is happening)
I can see is S3C-RTC's "enable_irq_wake" is failing with error -6.
I also observed that even though we are adding pmu_domain_ops using
irq_domain_add_hierarchy, but none of pmu_domain_ops are getting called.
Please let me know if I am missing anything or do I need to modify
anything to test S2R on Exynos SoC.
---------------------
echo +10 > /sys/class/rtc/rtc1/wakealarm; sleep 1; echo mem > /sys/power/sta
te
[ 257.428163] PM: Syncing filesystems ... done.
[ 257.431786] Freezing user space processes ... (elapsed 0.003 seconds)
done.
[ 257.439680] Freezing remaining freezable tasks ... (elapsed 0.001
seconds) done.
[ 257.544451] wake enabled for irq 116
[ 257.546916] CPU: 0 PID: 1311 Comm: ash Not tainted
3.19.0-rc4-next-20150114-00023-g492ff37 #15
[ 257.555141] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[ 257.561231] [<c0014430>] (unwind_backtrace) from [<c0011594>]
(show_stack+0x10/0x14)
[ 257.568948] [<c0011594>] (show_stack) from [<c0418b00>]
(dump_stack+0x84/0xc4)
[ 257.576151] [<c0418b00>] (dump_stack) from [<c005ce30>]
(set_irq_wake_real+0x58/0x8c)
[ 257.583961] [<c005ce30>] (set_irq_wake_real) from [<c005cef0>]
(irq_set_irq_wake+0x8c/0xf0)
[ 257.592295] [<c005cef0>] (irq_set_irq_wake) from [<c02e9d94>]
(s3c_rtc_suspend+0xb8/0xdc)
[ 257.600456] [<c02e9d94>] (s3c_rtc_suspend) from [<c0298c80>]
(dpm_run_callback.isra.13+0x1c/0x60)
[ 257.609308] [<c0298c80>] (dpm_run_callback.isra.13) from [<c02996a0>]
(__device_suspend+0x128/0x2d0)
[ 257.618422] [<c02996a0>] (__device_suspend) from [<c029a850>]
(dpm_suspend+0x64/0x22c)
[ 257.626320] [<c029a850>] (dpm_suspend) from [<c0058488>]
(suspend_devices_and_enter+0x88/0x3dc)
[ 257.634999] [<c0058488>] (suspend_devices_and_enter) from
[<c00589c8>] (pm_suspend+0x1ec/0x24c)
[ 257.643680] [<c00589c8>] (pm_suspend) from [<c00576e0>]
(state_store+0x68/0xb8)
[ 257.650972] [<c00576e0>] (state_store) from [<c012835c>]
(kernfs_fop_write+0xb8/0x19c)
[ 257.658870] [<c012835c>] (kernfs_fop_write) from [<c00cf620>]
(vfs_write+0xa0/0x1ac)
[ 257.666595] [<c00cf620>] (vfs_write) from [<c00cfc78>]
(SyS_write+0x44/0x9c)
[ 257.673625] [<c00cfc78>] (SyS_write) from [<c000e6e0>]
(ret_fast_syscall+0x0/0x30)
[ 257.681176] genirq: PKD: irq_desc->name: (null): irq: 60
[ 257.686469] genirq: PKD: set_irq_wake_real: ret: -6
[ 257.691349] s3c-rtc 101e0000.rtc: enable_irq_wake failed: -6
[ 257.708926] PM: suspend of devices complete after 260.482 msecs
[ 257.713362] BUCK9: No configuration
[ 257.716840] BUCK8: No configuration
[ 257.720309] BUCK7: No configuration
[ 257.723776] BUCK6: No configuration
[ 257.727254] P1.8V_BUCK_OUT5: No configuration
[ 257.731597] LDO26: No configuration
[ 257.735066] LDO25: No configuration
[ 257.738532] LDO24: No configuration
[ 257.742009] LDO23: No configuration
[ 257.745481] LDO22: No configuration
[ 257.748954] LDO21: No configuration
[ 257.752419] LDO20: No configuration
[ 257.755897] LDO19: No configuration
[ 257.759370] LDO18: No configuration
[ 257.762835] LDO17: No configuration
[ 257.766314] P1.8V_LDO_OUT16: No configuration
[ 257.770653] P1.0V_LDO_OUT15: No configuration
[ 257.774994] P1.8V_LDO_OUT14: No configuration
[ 257.779334] P1.8V_LDO_OUT13: No configuration
[ 257.783668] P3.0V_LDO_OUT12: No configuration
[ 257.788013] P1.8V_LDO_OUT11: No configuration
[ 257.792353] P1.8V_LDO_OUT10: No configuration
[ 257.796693] LDO9: No configuration
[ 257.800079] P1.0V_LDO_OUT8: No configuration
[ 257.804332] P1.1V_LDO_OUT7: No configuration
[ 257.808579] P1.1V_LDO_OUT6: No configuration
[ 257.812838] P1.8V_LDO_OUT5: No configuration
[ 257.817091] P2.8V_LDO_OUT4: No configuration
[ 257.821345] P1.8V_LDO_OUT3: No configuration
[ 257.825599] P1.2V_LDO_OUT2: No configuration
[ 257.829851] P1.0V_LDO_OUT1: No configuration
[ 257.835786] PM: late suspend of devices complete after 1.676 msecs
[ 257.841913] PM: noirq suspend of devices complete after 1.420 msecs
[ 257.846737] Disabling non-boot CPUs ...
[ 257.850810] IRQ54 no longer affine to CPU1
[ 257.850922] CPU1: shutdown
------------------------------------
Thanks,
Pankaj Dubey
^ permalink raw reply [flat|nested] 36+ messages in thread
* [v3,15/21] ARM: exynos4/5: convert pmu wakeup to stacked domains
2015-01-15 6:41 ` [v3,15/21] " Pankaj Dubey
@ 2015-01-16 19:22 ` Marc Zyngier
0 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-16 19:22 UTC (permalink / raw)
To: linux-arm-kernel
Hi Pankaj,
On 15/01/15 06:41, Pankaj Dubey wrote:
> +CC: Thomas Abraham <thomas.ab@samsung.com>
>
> Hi Mark,
>
> On Monday 12 January 2015 11:56 PM, Marc Zyngier wrote:
>> Exynos has been (ab)using the gic_arch_extn to provide
>> wakeup from suspend, and it makes a lot of sense to convert
>> this code to use stacked domains instead.
>>
>> This patch does just this, updating the DT files to actually
>> reflect what the HW provides.
>>
>> BIG FAT WARNING: because the DTs were so far lying by not
>> exposing the fact that the PMU block is actually the first
>> interrupt controller in the chain for RTC, kernels with this patch
>> applied wont have any suspend-resume facility when booted
>> with old DTs, and old kernels with updated DTs may not even boot.
>>
>> Also, I stronly suspect that there is more than two wake-up
>> interrupts on these platforms, but I leave it to the maintainers
>> to fix their mess.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
>>
>
> I tested this series on Exynos5250, using kgene/for-next and
> linux-next/next-20150114, but S2R failed on Exynos5250 based SMDK board.
>
> Following is the log I got on SMDK5250 board, (note I have added some
> debugging log to know what is happening)
>
> I can see is S3C-RTC's "enable_irq_wake" is failing with error -6.
> I also observed that even though we are adding pmu_domain_ops using
> irq_domain_add_hierarchy, but none of pmu_domain_ops are getting called.
>
> Please let me know if I am missing anything or do I need to modify
> anything to test S2R on Exynos SoC.
Thanks for giving it a go. One think I noticed is that I forgot to add a
"#interrupt-cells = <3>;" to the pmu_system_controller node.
Also, it would be interesting to know what is the hwirq associated with
the irq_desc you've printed below.
Thanks,
M.
> ---------------------
> echo +10 > /sys/class/rtc/rtc1/wakealarm; sleep 1; echo mem > /sys/power/sta
> te
> [ 257.428163] PM: Syncing filesystems ... done.
> [ 257.431786] Freezing user space processes ... (elapsed 0.003 seconds)
> done.
> [ 257.439680] Freezing remaining freezable tasks ... (elapsed 0.001
> seconds) done.
> [ 257.544451] wake enabled for irq 116
> [ 257.546916] CPU: 0 PID: 1311 Comm: ash Not tainted
> 3.19.0-rc4-next-20150114-00023-g492ff37 #15
> [ 257.555141] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
> [ 257.561231] [<c0014430>] (unwind_backtrace) from [<c0011594>]
> (show_stack+0x10/0x14)
> [ 257.568948] [<c0011594>] (show_stack) from [<c0418b00>]
> (dump_stack+0x84/0xc4)
> [ 257.576151] [<c0418b00>] (dump_stack) from [<c005ce30>]
> (set_irq_wake_real+0x58/0x8c)
> [ 257.583961] [<c005ce30>] (set_irq_wake_real) from [<c005cef0>]
> (irq_set_irq_wake+0x8c/0xf0)
> [ 257.592295] [<c005cef0>] (irq_set_irq_wake) from [<c02e9d94>]
> (s3c_rtc_suspend+0xb8/0xdc)
> [ 257.600456] [<c02e9d94>] (s3c_rtc_suspend) from [<c0298c80>]
> (dpm_run_callback.isra.13+0x1c/0x60)
> [ 257.609308] [<c0298c80>] (dpm_run_callback.isra.13) from [<c02996a0>]
> (__device_suspend+0x128/0x2d0)
> [ 257.618422] [<c02996a0>] (__device_suspend) from [<c029a850>]
> (dpm_suspend+0x64/0x22c)
> [ 257.626320] [<c029a850>] (dpm_suspend) from [<c0058488>]
> (suspend_devices_and_enter+0x88/0x3dc)
> [ 257.634999] [<c0058488>] (suspend_devices_and_enter) from
> [<c00589c8>] (pm_suspend+0x1ec/0x24c)
> [ 257.643680] [<c00589c8>] (pm_suspend) from [<c00576e0>]
> (state_store+0x68/0xb8)
> [ 257.650972] [<c00576e0>] (state_store) from [<c012835c>]
> (kernfs_fop_write+0xb8/0x19c)
> [ 257.658870] [<c012835c>] (kernfs_fop_write) from [<c00cf620>]
> (vfs_write+0xa0/0x1ac)
> [ 257.666595] [<c00cf620>] (vfs_write) from [<c00cfc78>]
> (SyS_write+0x44/0x9c)
> [ 257.673625] [<c00cfc78>] (SyS_write) from [<c000e6e0>]
> (ret_fast_syscall+0x0/0x30)
> [ 257.681176] genirq: PKD: irq_desc->name: (null): irq: 60
> [ 257.686469] genirq: PKD: set_irq_wake_real: ret: -6
> [ 257.691349] s3c-rtc 101e0000.rtc: enable_irq_wake failed: -6
> [ 257.708926] PM: suspend of devices complete after 260.482 msecs
> [ 257.713362] BUCK9: No configuration
> [ 257.716840] BUCK8: No configuration
> [ 257.720309] BUCK7: No configuration
> [ 257.723776] BUCK6: No configuration
> [ 257.727254] P1.8V_BUCK_OUT5: No configuration
> [ 257.731597] LDO26: No configuration
> [ 257.735066] LDO25: No configuration
> [ 257.738532] LDO24: No configuration
> [ 257.742009] LDO23: No configuration
> [ 257.745481] LDO22: No configuration
> [ 257.748954] LDO21: No configuration
> [ 257.752419] LDO20: No configuration
> [ 257.755897] LDO19: No configuration
> [ 257.759370] LDO18: No configuration
> [ 257.762835] LDO17: No configuration
> [ 257.766314] P1.8V_LDO_OUT16: No configuration
> [ 257.770653] P1.0V_LDO_OUT15: No configuration
> [ 257.774994] P1.8V_LDO_OUT14: No configuration
> [ 257.779334] P1.8V_LDO_OUT13: No configuration
> [ 257.783668] P3.0V_LDO_OUT12: No configuration
> [ 257.788013] P1.8V_LDO_OUT11: No configuration
> [ 257.792353] P1.8V_LDO_OUT10: No configuration
> [ 257.796693] LDO9: No configuration
> [ 257.800079] P1.0V_LDO_OUT8: No configuration
> [ 257.804332] P1.1V_LDO_OUT7: No configuration
> [ 257.808579] P1.1V_LDO_OUT6: No configuration
> [ 257.812838] P1.8V_LDO_OUT5: No configuration
> [ 257.817091] P2.8V_LDO_OUT4: No configuration
> [ 257.821345] P1.8V_LDO_OUT3: No configuration
> [ 257.825599] P1.2V_LDO_OUT2: No configuration
> [ 257.829851] P1.0V_LDO_OUT1: No configuration
> [ 257.835786] PM: late suspend of devices complete after 1.676 msecs
> [ 257.841913] PM: noirq suspend of devices complete after 1.420 msecs
> [ 257.846737] Disabling non-boot CPUs ...
> [ 257.850810] IRQ54 no longer affine to CPU1
> [ 257.850922] CPU1: shutdown
>
> ------------------------------------
>
> Thanks,
> Pankaj Dubey
>
--
Jazz is not dead. It just smells funny...
^ permalink raw reply [flat|nested] 36+ messages in thread
* [PATCH v3 16/21] DT: exynos: update PMU binding
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (14 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 15/21] ARM: exynos4/5: convert pmu wakeup " Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 17/21] irqchip: gic: add an entry point to set up irqchip flags Marc Zyngier
` (4 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Document the fact that some Exynos PMUs are capable of acting as
an interrupt controller.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
Documentation/devicetree/bindings/arm/samsung/pmu.txt | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/samsung/pmu.txt b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
index 1e1979b..d698e74 100644
--- a/Documentation/devicetree/bindings/arm/samsung/pmu.txt
+++ b/Documentation/devicetree/bindings/arm/samsung/pmu.txt
@@ -28,10 +28,23 @@ Properties:
- clocks : list of phandles and specifiers to all input clocks listed in
clock-names property.
+Optional properties:
+
+Some PMUs are capable of behaving as an interrupt controller (mostly
+to wake up a suspended PMU). In which case, they can have the
+following properties:
+
+- interrupt-controller: indicate that said PMU is an interrupt controller
+
+- interrupt-parent: a phandle indicating which interrupt controller
+ this PMU signals interrupts to.
+
Example :
pmu_system_controller: system-controller at 10040000 {
compatible = "samsung,exynos5250-pmu", "syscon";
reg = <0x10040000 0x5000>;
+ interrupt-controller;
+ interrupt-parent = <&gic>;
#clock-cells = <1>;
clock-names = "clkout0", "clkout1", "clkout2", "clkout3",
"clkout4", "clkout8", "clkout9";
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 17/21] irqchip: gic: add an entry point to set up irqchip flags
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (15 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 16/21] DT: exynos: update PMU binding Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 18/21] ARM: shmobile: remove use of gic_arch_extn.irq_set_wake Marc Zyngier
` (3 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
A common use of gic_arch_extn is to set up additional flags
to the GIC irqchip. It looks like a benign enough hack that
doesn't really require the users of that feature to be converted
to stacked domains.
Add a gic_set_irqchip_flags() function that platform code can
call instead of using the dreaded gic_arch_extn.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic.c | 5 +++++
include/linux/irqchip/arm-gic.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 9c30a76..23fe3be 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -877,6 +877,11 @@ static const struct irq_domain_ops gic_irq_domain_ops = {
.xlate = gic_irq_domain_xlate,
};
+void gic_set_irqchip_flags(unsigned long flags)
+{
+ gic_chip.flags |= flags;
+}
+
void __init gic_init_bases(unsigned int gic_nr, int irq_start,
void __iomem *dist_base, void __iomem *cpu_base,
u32 percpu_offset, struct device_node *node)
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index 3978c5b..36ec4ae 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -97,6 +97,7 @@ struct device_node;
extern struct irq_chip gic_arch_extn;
+void gic_set_irqchip_flags(unsigned long flags);
void gic_init_bases(unsigned int, int, void __iomem *, void __iomem *,
u32 offset, struct device_node *);
void gic_cascade_irq(unsigned int gic_nr, unsigned int irq);
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 18/21] ARM: shmobile: remove use of gic_arch_extn.irq_set_wake
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (16 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 17/21] irqchip: gic: add an entry point to set up irqchip flags Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 19/21] ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags Marc Zyngier
` (2 subsequent siblings)
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
shmobile only uses gic_arch_extn.irq_set_wake to prevent the GIC
from returning -ENXIO when receiving a wake-up configuration request.
It is a lot simpler to tell the irq layer that we don't need any
configuration by using the IRQCHIP_SKIP_SET_WAKE, thanks to the
new gic_set_irqchip_flags function.
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/mach-shmobile/intc-sh73a0.c | 7 +------
arch/arm/mach-shmobile/setup-r8a7779.c | 7 +------
2 files changed, 2 insertions(+), 12 deletions(-)
diff --git a/arch/arm/mach-shmobile/intc-sh73a0.c b/arch/arm/mach-shmobile/intc-sh73a0.c
index 9e36180..fd63ae6 100644
--- a/arch/arm/mach-shmobile/intc-sh73a0.c
+++ b/arch/arm/mach-shmobile/intc-sh73a0.c
@@ -252,11 +252,6 @@ static irqreturn_t sh73a0_intcs_demux(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static int sh73a0_set_wake(struct irq_data *data, unsigned int on)
-{
- return 0; /* always allow wakeup */
-}
-
#define PINTER0_PHYS 0xe69000a0
#define PINTER1_PHYS 0xe69000a4
#define PINTER0_VIRT IOMEM(0xe69000a0)
@@ -318,8 +313,8 @@ void __init sh73a0_init_irq(void)
void __iomem *gic_cpu_base = IOMEM(0xf0000100);
void __iomem *intevtsa = ioremap_nocache(0xffd20100, PAGE_SIZE);
+ gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE);
gic_init(0, 29, gic_dist_base, gic_cpu_base);
- gic_arch_extn.irq_set_wake = sh73a0_set_wake;
register_intc_controller(&intcs_desc);
register_intc_controller(&intc_pint0_desc);
diff --git a/arch/arm/mach-shmobile/setup-r8a7779.c b/arch/arm/mach-shmobile/setup-r8a7779.c
index 6156d17..989de2d 100644
--- a/arch/arm/mach-shmobile/setup-r8a7779.c
+++ b/arch/arm/mach-shmobile/setup-r8a7779.c
@@ -713,14 +713,9 @@ void __init r8a7779_init_late(void)
}
#ifdef CONFIG_USE_OF
-static int r8a7779_set_wake(struct irq_data *data, unsigned int on)
-{
- return 0; /* always allow wakeup */
-}
-
void __init r8a7779_init_irq_dt(void)
{
- gic_arch_extn.irq_set_wake = r8a7779_set_wake;
+ gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE);
irqchip_init();
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 19/21] ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (17 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 18/21] ARM: shmobile: remove use of gic_arch_extn.irq_set_wake Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 20/21] ARM: zynq: " Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 21/21] irqchip: gic: Drop support for gic_arch_extn Marc Zyngier
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Instead of directly touching gic_arch_extn, which is about to
be removed, use gic_set_irqchip_flags instead.
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/mach-ux500/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-ux500/cpu.c b/arch/arm/mach-ux500/cpu.c
index dbb2970..6ced0f6 100644
--- a/arch/arm/mach-ux500/cpu.c
+++ b/arch/arm/mach-ux500/cpu.c
@@ -52,7 +52,7 @@ void ux500_restart(enum reboot_mode mode, const char *cmd)
*/
void __init ux500_init_irq(void)
{
- gic_arch_extn.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
+ gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND);
irqchip_init();
/*
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 20/21] ARM: zynq: switch from gic_arch_extn to gic_set_irqchip_flags
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (18 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 19/21] ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
2015-01-12 18:26 ` [PATCH v3 21/21] irqchip: gic: Drop support for gic_arch_extn Marc Zyngier
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Instead of directly touching gic_arch_extn, which is about to
be removed, use gic_set_irqchip_flags instead.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
arch/arm/mach-zynq/common.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index 26f92c2..82734d5 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -188,7 +188,7 @@ static void __init zynq_map_io(void)
static void __init zynq_irq_init(void)
{
- gic_arch_extn.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND;
+ gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND);
irqchip_init();
}
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread* [PATCH v3 21/21] irqchip: gic: Drop support for gic_arch_extn
2015-01-12 18:26 [PATCH v3 00/21] irqchip: gic: killing gic_arch_extn and co, slowly Marc Zyngier
` (19 preceding siblings ...)
2015-01-12 18:26 ` [PATCH v3 20/21] ARM: zynq: " Marc Zyngier
@ 2015-01-12 18:26 ` Marc Zyngier
20 siblings, 0 replies; 36+ messages in thread
From: Marc Zyngier @ 2015-01-12 18:26 UTC (permalink / raw)
To: linux-arm-kernel
Now that the users of gic_arch_extn have been fixed, drop the
"feature" for good. This leads to the removal of some now useless
locking.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
drivers/irqchip/irq-gic.c | 54 -----------------------------------------
include/linux/irqchip/arm-gic.h | 2 --
2 files changed, 56 deletions(-)
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 23fe3be..78d4dee 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -80,19 +80,6 @@ static DEFINE_RAW_SPINLOCK(irq_controller_lock);
#define NR_GIC_CPU_IF 8
static u8 gic_cpu_map[NR_GIC_CPU_IF] __read_mostly;
-/*
- * Supported arch specific GIC irq extension.
- * Default make them NULL.
- */
-struct irq_chip gic_arch_extn = {
- .irq_eoi = NULL,
- .irq_mask = NULL,
- .irq_unmask = NULL,
- .irq_retrigger = NULL,
- .irq_set_type = NULL,
- .irq_set_wake = NULL,
-};
-
#ifndef MAX_GIC_NR
#define MAX_GIC_NR 1
#endif
@@ -155,32 +142,18 @@ static void gic_mask_irq(struct irq_data *d)
{
u32 mask = 1 << (gic_irq(d) % 32);
- raw_spin_lock(&irq_controller_lock);
writel_relaxed(mask, gic_dist_base(d) + GIC_DIST_ENABLE_CLEAR + (gic_irq(d) / 32) * 4);
- if (gic_arch_extn.irq_mask)
- gic_arch_extn.irq_mask(d);
- raw_spin_unlock(&irq_controller_lock);
}
static void gic_unmask_irq(struct irq_data *d)
{
u32 mask = 1 << (gic_irq(d) % 32);
- raw_spin_lock(&irq_controller_lock);
- if (gic_arch_extn.irq_unmask)
- gic_arch_extn.irq_unmask(d);
writel_relaxed(mask, gic_dist_base(d) + GIC_DIST_ENABLE_SET + (gic_irq(d) / 32) * 4);
- raw_spin_unlock(&irq_controller_lock);
}
static void gic_eoi_irq(struct irq_data *d)
{
- if (gic_arch_extn.irq_eoi) {
- raw_spin_lock(&irq_controller_lock);
- gic_arch_extn.irq_eoi(d);
- raw_spin_unlock(&irq_controller_lock);
- }
-
writel_relaxed(gic_irq(d), gic_cpu_base(d) + GIC_CPU_EOI);
}
@@ -196,23 +169,13 @@ static int gic_set_type(struct irq_data *d, unsigned int type)
if (type != IRQ_TYPE_LEVEL_HIGH && type != IRQ_TYPE_EDGE_RISING)
return -EINVAL;
- raw_spin_lock(&irq_controller_lock);
-
- if (gic_arch_extn.irq_set_type)
- gic_arch_extn.irq_set_type(d, type);
-
gic_configure_irq(gicirq, type, base, NULL);
- raw_spin_unlock(&irq_controller_lock);
-
return 0;
}
static int gic_retrigger(struct irq_data *d)
{
- if (gic_arch_extn.irq_retrigger)
- return gic_arch_extn.irq_retrigger(d);
-
/* the genirq layer expects 0 if we can't retrigger in hardware */
return 0;
}
@@ -244,21 +207,6 @@ static int gic_set_affinity(struct irq_data *d, const struct cpumask *mask_val,
}
#endif
-#ifdef CONFIG_PM
-static int gic_set_wake(struct irq_data *d, unsigned int on)
-{
- int ret = -ENXIO;
-
- if (gic_arch_extn.irq_set_wake)
- ret = gic_arch_extn.irq_set_wake(d, on);
-
- return ret;
-}
-
-#else
-#define gic_set_wake NULL
-#endif
-
static void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
{
u32 irqstat, irqnr;
@@ -321,7 +269,6 @@ static struct irq_chip gic_chip = {
#ifdef CONFIG_SMP
.irq_set_affinity = gic_set_affinity,
#endif
- .irq_set_wake = gic_set_wake,
};
void __init gic_cascade_irq(unsigned int gic_nr, unsigned int irq)
@@ -985,7 +932,6 @@ void __init gic_init_bases(unsigned int gic_nr, int irq_start,
set_handle_irq(gic_handle_irq);
}
- gic_chip.flags |= gic_arch_extn.flags;
gic_dist_init(gic);
gic_cpu_init(gic);
gic_pm_init(gic);
diff --git a/include/linux/irqchip/arm-gic.h b/include/linux/irqchip/arm-gic.h
index 36ec4ae..9de976b 100644
--- a/include/linux/irqchip/arm-gic.h
+++ b/include/linux/irqchip/arm-gic.h
@@ -95,8 +95,6 @@
struct device_node;
-extern struct irq_chip gic_arch_extn;
-
void gic_set_irqchip_flags(unsigned long flags);
void gic_init_bases(unsigned int, int, void __iomem *, void __iomem *,
u32 offset, struct device_node *);
--
2.1.4
^ permalink raw reply related [flat|nested] 36+ messages in thread