From: robherring2@gmail.com (Rob Herring)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 10/11] ARM: move sp804 and integrator timers to drivers/clocksource
Date: Wed, 20 Mar 2013 17:54:10 -0500 [thread overview]
Message-ID: <1363820051-24428-11-git-send-email-robherring2@gmail.com> (raw)
In-Reply-To: <1363820051-24428-1-git-send-email-robherring2@gmail.com>
From: Rob Herring <rob.herring@calxeda.com>
Move timer-sp and integrator-ap timer code to drivers/clocksource and
update timer-sp.h and arm_timer.h includes.
This adds CLKSRC_OF support for the integrator-ap timer and removes the
use of "arm,timer-primary" and "arm,timer-secondary" aliases. The timer
selection should not be important as all 3 timers are equal capability.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
arch/arm/Kconfig | 6 -
arch/arm/common/Makefile | 1 -
arch/arm/mach-integrator/Kconfig | 1 +
arch/arm/mach-integrator/integrator_ap.c | 169 +----------------
arch/arm/mach-integrator/integrator_cp.c | 3 +-
arch/arm/mach-realview/core.c | 3 +-
arch/arm/mach-versatile/core.c | 2 +-
arch/arm/mach-vexpress/ct-ca9x4.c | 4 +-
arch/arm/mach-vexpress/v2m.c | 3 +-
drivers/clocksource/Kconfig | 12 ++
drivers/clocksource/Makefile | 2 +
.../hardware => drivers/clocksource}/arm_timer.h | 6 +-
drivers/clocksource/integrator_ap_timer.c | 190 ++++++++++++++++++++
.../arm/common => drivers/clocksource}/timer-sp.c | 9 +-
include/clocksource/integrator_ap_timer.h | 7 +
.../hardware => include/clocksource}/timer-sp.h | 8 +
16 files changed, 232 insertions(+), 194 deletions(-)
rename {arch/arm/include/asm/hardware => drivers/clocksource}/arm_timer.h (89%)
create mode 100644 drivers/clocksource/integrator_ap_timer.c
rename {arch/arm/common => drivers/clocksource}/timer-sp.c (98%)
create mode 100644 include/clocksource/integrator_ap_timer.h
rename {arch/arm/include/asm/hardware => include/clocksource}/timer-sp.h (84%)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 774131a..46970d7 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1169,12 +1169,6 @@ config PLAT_PXA
config PLAT_VERSATILE
bool
-config ARM_TIMER_SP804
- bool
- select CLKSRC_MMIO
- select CLKSRC_OF if OF
- select HAVE_SCHED_CLOCK
-
source arch/arm/mm/Kconfig
config ARM_NR_BANKS
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index dc8dd0d..5a4cc1a 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -10,4 +10,3 @@ obj-$(CONFIG_SHARP_LOCOMO) += locomo.o
obj-$(CONFIG_SHARP_PARAM) += sharpsl_param.o
obj-$(CONFIG_SHARP_SCOOP) += scoop.o
obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o
-obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
diff --git a/arch/arm/mach-integrator/Kconfig b/arch/arm/mach-integrator/Kconfig
index abeff25..c5e4ff3 100644
--- a/arch/arm/mach-integrator/Kconfig
+++ b/arch/arm/mach-integrator/Kconfig
@@ -5,6 +5,7 @@ menu "Integrator Options"
config ARCH_INTEGRATOR_AP
bool "Support Integrator/AP and Integrator/PP2 platforms"
select CLKSRC_MMIO
+ select INTEGRATOR_AP_TIMER
select MIGHT_HAVE_PCI
select SERIAL_AMBA_PL010
select SERIAL_AMBA_PL010_CONSOLE
diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 4cb322d..6b5f540 100644
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -27,8 +27,6 @@
#include <linux/syscore_ops.h>
#include <linux/amba/bus.h>
#include <linux/amba/kmi.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irqchip/versatile-fpga.h>
@@ -41,15 +39,14 @@
#include <linux/stat.h>
#include <linux/sys_soc.h>
#include <linux/termios.h>
+#include <clocksource/integrator_ap_timer.h>
#include <video/vga.h>
#include <mach/hardware.h>
#include <mach/platform.h>
-#include <asm/hardware/arm_timer.h>
#include <asm/setup.h>
#include <asm/param.h> /* HZ */
#include <asm/mach-types.h>
-#include <asm/sched_clock.h>
#include <mach/lm.h>
#include <mach/irqs.h>
@@ -58,7 +55,6 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
-#include <asm/mach/time.h>
#include "common.h"
@@ -296,174 +292,12 @@ struct amba_pl010_data ap_uart_data = {
#define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
#define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
-static unsigned long timer_reload;
-
-static u32 notrace integrator_read_sched_clock(void)
-{
- return -readl((void __iomem *) TIMER2_VA_BASE + TIMER_VALUE);
-}
-
-static void integrator_clocksource_init(unsigned long inrate,
- void __iomem *base)
-{
- u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
- unsigned long rate = inrate;
-
- if (rate >= 1500000) {
- rate /= 16;
- ctrl |= TIMER_CTRL_DIV16;
- }
-
- writel(0xffff, base + TIMER_LOAD);
- writel(ctrl, base + TIMER_CTRL);
-
- clocksource_mmio_init(base + TIMER_VALUE, "timer2",
- rate, 200, 16, clocksource_mmio_readl_down);
- setup_sched_clock(integrator_read_sched_clock, 16, rate);
-}
-
-static void __iomem * clkevt_base;
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t integrator_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = dev_id;
-
- /* clear the interrupt */
- writel(1, clkevt_base + TIMER_INTCLR);
-
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-static void clkevt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt)
-{
- u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
-
- /* Disable timer */
- writel(ctrl, clkevt_base + TIMER_CTRL);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- /* Enable the timer and start the periodic tick */
- writel(timer_reload, clkevt_base + TIMER_LOAD);
- ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
- writel(ctrl, clkevt_base + TIMER_CTRL);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* Leave the timer disabled, .set_next_event will enable it */
- ctrl &= ~TIMER_CTRL_PERIODIC;
- writel(ctrl, clkevt_base + TIMER_CTRL);
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
- default:
- /* Just leave in disabled state */
- break;
- }
-
-}
-
-static int clkevt_set_next_event(unsigned long next, struct clock_event_device *evt)
-{
- unsigned long ctrl = readl(clkevt_base + TIMER_CTRL);
-
- writel(ctrl & ~TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
- writel(next, clkevt_base + TIMER_LOAD);
- writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
-
- return 0;
-}
-
-static struct clock_event_device integrator_clockevent = {
- .name = "timer1",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = clkevt_set_mode,
- .set_next_event = clkevt_set_next_event,
- .rating = 300,
-};
-
-static struct irqaction integrator_timer_irq = {
- .name = "timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = integrator_timer_interrupt,
- .dev_id = &integrator_clockevent,
-};
-
-static void integrator_clockevent_init(unsigned long inrate,
- void __iomem *base, int irq)
-{
- unsigned long rate = inrate;
- unsigned int ctrl = 0;
-
- clkevt_base = base;
- /* Calculate and program a divisor */
- if (rate > 0x100000 * HZ) {
- rate /= 256;
- ctrl |= TIMER_CTRL_DIV256;
- } else if (rate > 0x10000 * HZ) {
- rate /= 16;
- ctrl |= TIMER_CTRL_DIV16;
- }
- timer_reload = rate / HZ;
- writel(ctrl, clkevt_base + TIMER_CTRL);
-
- setup_irq(irq, &integrator_timer_irq);
- clockevents_config_and_register(&integrator_clockevent,
- rate,
- 1,
- 0xffffU);
-}
-
void __init ap_init_early(void)
{
}
#ifdef CONFIG_OF
-static void __init ap_of_timer_init(void)
-{
- struct device_node *node;
- const char *path;
- void __iomem *base;
- int err;
- int irq;
- struct clk *clk;
- unsigned long rate;
-
- clk = clk_get_sys("ap_timer", NULL);
- BUG_ON(IS_ERR(clk));
- clk_prepare_enable(clk);
- rate = clk_get_rate(clk);
-
- err = of_property_read_string(of_aliases,
- "arm,timer-primary", &path);
- if (WARN_ON(err))
- return;
- node = of_find_node_by_path(path);
- base = of_iomap(node, 0);
- if (WARN_ON(!base))
- return;
- writel(0, base + TIMER_CTRL);
- integrator_clocksource_init(rate, base);
-
- err = of_property_read_string(of_aliases,
- "arm,timer-secondary", &path);
- if (WARN_ON(err))
- return;
- node = of_find_node_by_path(path);
- base = of_iomap(node, 0);
- if (WARN_ON(!base))
- return;
- irq = irq_of_parse_and_map(node, 0);
- writel(0, base + TIMER_CTRL);
- integrator_clockevent_init(rate, base, irq);
-}
-
static const struct of_device_id fpga_irq_of_match[] __initconst = {
{ .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
{ /* Sentinel */ }
@@ -582,7 +416,6 @@ DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
.init_early = ap_init_early,
.init_irq = ap_init_irq_of,
.handle_irq = fpga_handle_irq,
- .init_time = ap_of_timer_init,
.init_machine = ap_init_of,
.restart = integrator_restart,
.dt_compat = ap_dt_board_compat,
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 5729c3d..b5c7a7b 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -28,6 +28,7 @@
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/sys_soc.h>
+#include <clocksource/timer-sp.h>
#include <mach/hardware.h>
#include <mach/platform.h>
@@ -44,8 +45,6 @@
#include <asm/mach/map.h>
#include <asm/mach/time.h>
-#include <asm/hardware/timer-sp.h>
-
#include <plat/clcd.h>
#include <plat/sched_clock.h>
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 8ce6366..2009f8f 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -31,6 +31,7 @@
#include <linux/amba/mmci.h>
#include <linux/gfp.h>
#include <linux/mtd/physmap.h>
+#include <clocksource/timer-sp.h>
#include <mach/hardware.h>
#include <asm/irq.h>
@@ -41,10 +42,8 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
-
#include <mach/platform.h>
#include <mach/irqs.h>
-#include <asm/hardware/timer-sp.h>
#include <plat/clcd.h>
#include <plat/sched_clock.h>
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index 5cdfc87..56ec027 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -38,6 +38,7 @@
#include <linux/clkdev.h>
#include <linux/mtd/physmap.h>
#include <linux/bitops.h>
+#include <clocksource/timer-sp.h>
#include <asm/irq.h>
#include <asm/hardware/icst.h>
@@ -49,7 +50,6 @@
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/platform.h>
-#include <asm/hardware/timer-sp.h>
#include <plat/clcd.h>
#include <plat/sched_clock.h>
diff --git a/arch/arm/mach-vexpress/ct-ca9x4.c b/arch/arm/mach-vexpress/ct-ca9x4.c
index 6f34497..8cce326 100644
--- a/arch/arm/mach-vexpress/ct-ca9x4.c
+++ b/arch/arm/mach-vexpress/ct-ca9x4.c
@@ -11,16 +11,14 @@
#include <linux/clkdev.h>
#include <linux/vexpress.h>
#include <linux/irqchip/arm-gic.h>
+#include <clocksource/timer-sp.h>
-#include <asm/hardware/arm_timer.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/smp_scu.h>
#include <asm/smp_twd.h>
#include <mach/ct-ca9x4.h>
-#include <asm/hardware/timer-sp.h>
-
#include <asm/mach/map.h>
#include <asm/mach/time.h>
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 09e571d..fb4cdc6 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -23,15 +23,14 @@
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.h>
#include <linux/vexpress.h>
+#include <clocksource/timer-sp.h>
#include <asm/mach-types.h>
#include <asm/sizes.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
-#include <asm/hardware/arm_timer.h>
#include <asm/hardware/cache-l2x0.h>
-#include <asm/hardware/timer-sp.h>
#include <mach/ct-ca9x4.h>
#include <mach/motherboard.h>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index d98e7e1..00aa4cd 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -25,6 +25,18 @@ config DW_APB_TIMER_OF
config ARMADA_370_XP_TIMER
bool
+config ARM_TIMER_SP804
+ bool
+ depends on ARM
+ select CLKSRC_MMIO
+ select CLKSRC_OF if OF
+ select HAVE_SCHED_CLOCK
+
+config INTEGRATOR_AP_TIMER
+ bool
+ depends on ARM
+ select CLKSRC_OF if OF
+
config SUNXI_TIMER
bool
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 4d8283a..9f3b62b 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -14,8 +14,10 @@ obj-$(CONFIG_DW_APB_TIMER) += dw_apb_timer.o
obj-$(CONFIG_DW_APB_TIMER_OF) += dw_apb_timer_of.o
obj-$(CONFIG_CLKSRC_NOMADIK_MTU) += nomadik-mtu.o
obj-$(CONFIG_CLKSRC_DBX500_PRCMU) += clksrc-dbx500-prcmu.o
+obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
obj-$(CONFIG_ARMADA_370_XP_TIMER) += time-armada-370-xp.o
obj-$(CONFIG_ARCH_BCM2835) += bcm2835_timer.o
+obj-$(CONFIG_INTEGRATOR_AP_TIMER) += integrator_ap_timer.o
obj-$(CONFIG_SUNXI_TIMER) += sunxi_timer.o
obj-$(CONFIG_ARCH_TEGRA) += tegra20_timer.o
obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o
diff --git a/arch/arm/include/asm/hardware/arm_timer.h b/drivers/clocksource/arm_timer.h
similarity index 89%
rename from arch/arm/include/asm/hardware/arm_timer.h
rename to drivers/clocksource/arm_timer.h
index d6030ff..3d3f679 100644
--- a/arch/arm/include/asm/hardware/arm_timer.h
+++ b/drivers/clocksource/arm_timer.h
@@ -1,5 +1,5 @@
-#ifndef __ASM_ARM_HARDWARE_ARM_TIMER_H
-#define __ASM_ARM_HARDWARE_ARM_TIMER_H
+#ifndef __CLOCKSOURCE_ARM_TIMER_H
+#define __CLOCKSOURCE_ARM_TIMER_H
/*
* ARM timer implementation, found in Integrator, Versatile and Realview
@@ -12,8 +12,6 @@
*
* Every SP804 contains two identical timers.
*/
-#define TIMER_1_BASE 0x00
-#define TIMER_2_BASE 0x20
#define TIMER_LOAD 0x00 /* ACVR rw */
#define TIMER_VALUE 0x04 /* ACVR ro */
diff --git a/drivers/clocksource/integrator_ap_timer.c b/drivers/clocksource/integrator_ap_timer.c
new file mode 100644
index 0000000..75eb6c9
--- /dev/null
+++ b/drivers/clocksource/integrator_ap_timer.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2000-2003 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#include <asm/sched_clock.h>
+
+#include "arm_timer.h"
+
+static unsigned long timer_reload;
+static void __iomem *clksrc_base;
+
+static u32 notrace integrator_read_sched_clock(void)
+{
+ return -readl(clksrc_base + TIMER_VALUE);
+}
+
+void __init integrator_clocksource_init(unsigned long inrate,
+ void __iomem *base)
+{
+ u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
+ unsigned long rate = inrate;
+
+ clksrc_base = base;
+
+ if (rate >= 1500000) {
+ rate /= 16;
+ ctrl |= TIMER_CTRL_DIV16;
+ }
+
+ writel(0xffff, base + TIMER_LOAD);
+ writel(ctrl, base + TIMER_CTRL);
+
+ clocksource_mmio_init(base + TIMER_VALUE, "timer2",
+ rate, 200, 16, clocksource_mmio_readl_down);
+ setup_sched_clock(integrator_read_sched_clock, 16, rate);
+}
+
+static void __iomem * clkevt_base;
+
+/*
+ * IRQ handler for the timer
+ */
+static irqreturn_t integrator_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+
+ /* clear the interrupt */
+ writel(1, clkevt_base + TIMER_INTCLR);
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static void clkevt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt)
+{
+ u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
+
+ /* Disable timer */
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ /* Enable the timer and start the periodic tick */
+ writel(timer_reload, clkevt_base + TIMER_LOAD);
+ ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ /* Leave the timer disabled, .set_next_event will enable it */
+ ctrl &= ~TIMER_CTRL_PERIODIC;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_RESUME:
+ default:
+ /* Just leave in disabled state */
+ break;
+ }
+
+}
+
+static int clkevt_set_next_event(unsigned long next, struct clock_event_device *evt)
+{
+ unsigned long ctrl = readl(clkevt_base + TIMER_CTRL);
+
+ writel(ctrl & ~TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
+ writel(next, clkevt_base + TIMER_LOAD);
+ writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
+
+ return 0;
+}
+
+static struct clock_event_device integrator_clockevent = {
+ .name = "timer1",
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .set_mode = clkevt_set_mode,
+ .set_next_event = clkevt_set_next_event,
+ .rating = 300,
+};
+
+static struct irqaction integrator_timer_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = integrator_timer_interrupt,
+ .dev_id = &integrator_clockevent,
+};
+
+void __init integrator_clockevent_init(unsigned long inrate,
+ void __iomem *base, int irq)
+{
+ unsigned long rate = inrate;
+ unsigned int ctrl = 0;
+
+ clkevt_base = base;
+ /* Calculate and program a divisor */
+ if (rate > 0x100000 * HZ) {
+ rate /= 256;
+ ctrl |= TIMER_CTRL_DIV256;
+ } else if (rate > 0x10000 * HZ) {
+ rate /= 16;
+ ctrl |= TIMER_CTRL_DIV16;
+ }
+ timer_reload = rate / HZ;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+
+ setup_irq(irq, &integrator_timer_irq);
+ clockevents_config_and_register(&integrator_clockevent,
+ rate,
+ 1,
+ 0xffffU);
+}
+
+static void __init ap_of_timer_init(struct device_node *node)
+{
+ static int init_cnt = 0;
+ void __iomem *base;
+ int irq;
+ struct clk *clk;
+ unsigned long rate;
+
+ if ((init_cnt == 2) || !of_device_is_available(node))
+ return;
+
+ clk = clk_get_sys("ap_timer", NULL);
+ BUG_ON(IS_ERR(clk));
+ clk_prepare_enable(clk);
+ rate = clk_get_rate(clk);
+
+ base = of_iomap(node, 0);
+ if (WARN_ON(!base))
+ return;
+
+ writel(0, base + TIMER_CTRL);
+
+ if (!init_cnt) {
+ irq = irq_of_parse_and_map(node, 0);
+ integrator_clockevent_init(rate, base, irq);
+ } else
+ integrator_clocksource_init(rate, base);
+
+ init_cnt++;
+}
+CLOCKSOURCE_OF_DECLARE(integrator_ap, "integrator-timer", ap_of_timer_init);
diff --git a/arch/arm/common/timer-sp.c b/drivers/clocksource/timer-sp.c
similarity index 98%
rename from arch/arm/common/timer-sp.c
rename to drivers/clocksource/timer-sp.c
index 203a2b3..91b12e3 100644
--- a/arch/arm/common/timer-sp.c
+++ b/drivers/clocksource/timer-sp.c
@@ -1,6 +1,4 @@
/*
- * linux/arch/arm/common/timer-sp.c
- *
* Copyright (C) 1999 - 2003 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
*
@@ -28,10 +26,11 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <clocksource/timer-sp.h>
#include <asm/sched_clock.h>
-#include <asm/hardware/arm_timer.h>
-#include <asm/hardware/timer-sp.h>
+
+#include "arm_timer.h"
static long __init sp804_get_clock_rate(struct clk *clk)
{
@@ -283,4 +282,4 @@ static void __init integrator_cp_of_init(struct device_node *np)
init_count++;
}
-CLOCKSOURCE_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init);
\ No newline at end of file
+CLOCKSOURCE_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init);
diff --git a/include/clocksource/integrator_ap_timer.h b/include/clocksource/integrator_ap_timer.h
new file mode 100644
index 0000000..2f585fc
--- /dev/null
+++ b/include/clocksource/integrator_ap_timer.h
@@ -0,0 +1,7 @@
+#ifndef __CLOCKSOURCE_INTEGRATOR_AP_TIMER
+#define __CLOCKSOURCE_INTEGRATOR_AP_TIMER
+
+void integrator_clocksource_init(unsigned long inrate, void __iomem *base);
+void integrator_clockevent_init(unsigned long inrate, void __iomem *base, int irq);
+
+#endif
diff --git a/arch/arm/include/asm/hardware/timer-sp.h b/include/clocksource/timer-sp.h
similarity index 84%
rename from arch/arm/include/asm/hardware/timer-sp.h
rename to include/clocksource/timer-sp.h
index bb28af7..f59dc9c 100644
--- a/arch/arm/include/asm/hardware/timer-sp.h
+++ b/include/clocksource/timer-sp.h
@@ -1,3 +1,9 @@
+#ifndef __CLOCKSOURCE_TIMER_SP
+#define __CLOCKSOURCE_TIMER_SP
+
+#define TIMER_1_BASE 0x00
+#define TIMER_2_BASE 0x20
+
struct clk;
void __sp804_clocksource_and_sched_clock_init(void __iomem *,
@@ -21,3 +27,5 @@ static inline void sp804_clockevents_init(void __iomem *base, unsigned int irq,
__sp804_clockevents_init(base, irq, NULL, name);
}
+
+#endif
--
1.7.10.4
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robherring2@gmail.com>
To: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
devicetree-discuss@lists.ozlabs.org
Cc: Arnd Bergmann <arnd@arndb.de>,
linus.walleij@linaro.org, Russell King <linux@arm.linux.org.uk>,
haojian.zhuang@linaro.org, pawel.moll@arm.com,
john.stultz@linaro.org, tglx@linutronix.de,
Rob Herring <rob.herring@calxeda.com>
Subject: [PATCH 10/11] ARM: move sp804 and integrator timers to drivers/clocksource
Date: Wed, 20 Mar 2013 17:54:10 -0500 [thread overview]
Message-ID: <1363820051-24428-11-git-send-email-robherring2@gmail.com> (raw)
In-Reply-To: <1363820051-24428-1-git-send-email-robherring2@gmail.com>
From: Rob Herring <rob.herring@calxeda.com>
Move timer-sp and integrator-ap timer code to drivers/clocksource and
update timer-sp.h and arm_timer.h includes.
This adds CLKSRC_OF support for the integrator-ap timer and removes the
use of "arm,timer-primary" and "arm,timer-secondary" aliases. The timer
selection should not be important as all 3 timers are equal capability.
Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
arch/arm/Kconfig | 6 -
arch/arm/common/Makefile | 1 -
arch/arm/mach-integrator/Kconfig | 1 +
arch/arm/mach-integrator/integrator_ap.c | 169 +----------------
arch/arm/mach-integrator/integrator_cp.c | 3 +-
arch/arm/mach-realview/core.c | 3 +-
arch/arm/mach-versatile/core.c | 2 +-
arch/arm/mach-vexpress/ct-ca9x4.c | 4 +-
arch/arm/mach-vexpress/v2m.c | 3 +-
drivers/clocksource/Kconfig | 12 ++
drivers/clocksource/Makefile | 2 +
.../hardware => drivers/clocksource}/arm_timer.h | 6 +-
drivers/clocksource/integrator_ap_timer.c | 190 ++++++++++++++++++++
.../arm/common => drivers/clocksource}/timer-sp.c | 9 +-
include/clocksource/integrator_ap_timer.h | 7 +
.../hardware => include/clocksource}/timer-sp.h | 8 +
16 files changed, 232 insertions(+), 194 deletions(-)
rename {arch/arm/include/asm/hardware => drivers/clocksource}/arm_timer.h (89%)
create mode 100644 drivers/clocksource/integrator_ap_timer.c
rename {arch/arm/common => drivers/clocksource}/timer-sp.c (98%)
create mode 100644 include/clocksource/integrator_ap_timer.h
rename {arch/arm/include/asm/hardware => include/clocksource}/timer-sp.h (84%)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 774131a..46970d7 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1169,12 +1169,6 @@ config PLAT_PXA
config PLAT_VERSATILE
bool
-config ARM_TIMER_SP804
- bool
- select CLKSRC_MMIO
- select CLKSRC_OF if OF
- select HAVE_SCHED_CLOCK
-
source arch/arm/mm/Kconfig
config ARM_NR_BANKS
diff --git a/arch/arm/common/Makefile b/arch/arm/common/Makefile
index dc8dd0d..5a4cc1a 100644
--- a/arch/arm/common/Makefile
+++ b/arch/arm/common/Makefile
@@ -10,4 +10,3 @@ obj-$(CONFIG_SHARP_LOCOMO) += locomo.o
obj-$(CONFIG_SHARP_PARAM) += sharpsl_param.o
obj-$(CONFIG_SHARP_SCOOP) += scoop.o
obj-$(CONFIG_PCI_HOST_ITE8152) += it8152.o
-obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
diff --git a/arch/arm/mach-integrator/Kconfig b/arch/arm/mach-integrator/Kconfig
index abeff25..c5e4ff3 100644
--- a/arch/arm/mach-integrator/Kconfig
+++ b/arch/arm/mach-integrator/Kconfig
@@ -5,6 +5,7 @@ menu "Integrator Options"
config ARCH_INTEGRATOR_AP
bool "Support Integrator/AP and Integrator/PP2 platforms"
select CLKSRC_MMIO
+ select INTEGRATOR_AP_TIMER
select MIGHT_HAVE_PCI
select SERIAL_AMBA_PL010
select SERIAL_AMBA_PL010_CONSOLE
diff --git a/arch/arm/mach-integrator/integrator_ap.c b/arch/arm/mach-integrator/integrator_ap.c
index 4cb322d..6b5f540 100644
--- a/arch/arm/mach-integrator/integrator_ap.c
+++ b/arch/arm/mach-integrator/integrator_ap.c
@@ -27,8 +27,6 @@
#include <linux/syscore_ops.h>
#include <linux/amba/bus.h>
#include <linux/amba/kmi.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/irqchip/versatile-fpga.h>
@@ -41,15 +39,14 @@
#include <linux/stat.h>
#include <linux/sys_soc.h>
#include <linux/termios.h>
+#include <clocksource/integrator_ap_timer.h>
#include <video/vga.h>
#include <mach/hardware.h>
#include <mach/platform.h>
-#include <asm/hardware/arm_timer.h>
#include <asm/setup.h>
#include <asm/param.h> /* HZ */
#include <asm/mach-types.h>
-#include <asm/sched_clock.h>
#include <mach/lm.h>
#include <mach/irqs.h>
@@ -58,7 +55,6 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
-#include <asm/mach/time.h>
#include "common.h"
@@ -296,174 +292,12 @@ struct amba_pl010_data ap_uart_data = {
#define TIMER1_VA_BASE __io_address(INTEGRATOR_TIMER1_BASE)
#define TIMER2_VA_BASE __io_address(INTEGRATOR_TIMER2_BASE)
-static unsigned long timer_reload;
-
-static u32 notrace integrator_read_sched_clock(void)
-{
- return -readl((void __iomem *) TIMER2_VA_BASE + TIMER_VALUE);
-}
-
-static void integrator_clocksource_init(unsigned long inrate,
- void __iomem *base)
-{
- u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
- unsigned long rate = inrate;
-
- if (rate >= 1500000) {
- rate /= 16;
- ctrl |= TIMER_CTRL_DIV16;
- }
-
- writel(0xffff, base + TIMER_LOAD);
- writel(ctrl, base + TIMER_CTRL);
-
- clocksource_mmio_init(base + TIMER_VALUE, "timer2",
- rate, 200, 16, clocksource_mmio_readl_down);
- setup_sched_clock(integrator_read_sched_clock, 16, rate);
-}
-
-static void __iomem * clkevt_base;
-
-/*
- * IRQ handler for the timer
- */
-static irqreturn_t integrator_timer_interrupt(int irq, void *dev_id)
-{
- struct clock_event_device *evt = dev_id;
-
- /* clear the interrupt */
- writel(1, clkevt_base + TIMER_INTCLR);
-
- evt->event_handler(evt);
-
- return IRQ_HANDLED;
-}
-
-static void clkevt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt)
-{
- u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
-
- /* Disable timer */
- writel(ctrl, clkevt_base + TIMER_CTRL);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- /* Enable the timer and start the periodic tick */
- writel(timer_reload, clkevt_base + TIMER_LOAD);
- ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
- writel(ctrl, clkevt_base + TIMER_CTRL);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* Leave the timer disabled, .set_next_event will enable it */
- ctrl &= ~TIMER_CTRL_PERIODIC;
- writel(ctrl, clkevt_base + TIMER_CTRL);
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
- default:
- /* Just leave in disabled state */
- break;
- }
-
-}
-
-static int clkevt_set_next_event(unsigned long next, struct clock_event_device *evt)
-{
- unsigned long ctrl = readl(clkevt_base + TIMER_CTRL);
-
- writel(ctrl & ~TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
- writel(next, clkevt_base + TIMER_LOAD);
- writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
-
- return 0;
-}
-
-static struct clock_event_device integrator_clockevent = {
- .name = "timer1",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = clkevt_set_mode,
- .set_next_event = clkevt_set_next_event,
- .rating = 300,
-};
-
-static struct irqaction integrator_timer_irq = {
- .name = "timer",
- .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
- .handler = integrator_timer_interrupt,
- .dev_id = &integrator_clockevent,
-};
-
-static void integrator_clockevent_init(unsigned long inrate,
- void __iomem *base, int irq)
-{
- unsigned long rate = inrate;
- unsigned int ctrl = 0;
-
- clkevt_base = base;
- /* Calculate and program a divisor */
- if (rate > 0x100000 * HZ) {
- rate /= 256;
- ctrl |= TIMER_CTRL_DIV256;
- } else if (rate > 0x10000 * HZ) {
- rate /= 16;
- ctrl |= TIMER_CTRL_DIV16;
- }
- timer_reload = rate / HZ;
- writel(ctrl, clkevt_base + TIMER_CTRL);
-
- setup_irq(irq, &integrator_timer_irq);
- clockevents_config_and_register(&integrator_clockevent,
- rate,
- 1,
- 0xffffU);
-}
-
void __init ap_init_early(void)
{
}
#ifdef CONFIG_OF
-static void __init ap_of_timer_init(void)
-{
- struct device_node *node;
- const char *path;
- void __iomem *base;
- int err;
- int irq;
- struct clk *clk;
- unsigned long rate;
-
- clk = clk_get_sys("ap_timer", NULL);
- BUG_ON(IS_ERR(clk));
- clk_prepare_enable(clk);
- rate = clk_get_rate(clk);
-
- err = of_property_read_string(of_aliases,
- "arm,timer-primary", &path);
- if (WARN_ON(err))
- return;
- node = of_find_node_by_path(path);
- base = of_iomap(node, 0);
- if (WARN_ON(!base))
- return;
- writel(0, base + TIMER_CTRL);
- integrator_clocksource_init(rate, base);
-
- err = of_property_read_string(of_aliases,
- "arm,timer-secondary", &path);
- if (WARN_ON(err))
- return;
- node = of_find_node_by_path(path);
- base = of_iomap(node, 0);
- if (WARN_ON(!base))
- return;
- irq = irq_of_parse_and_map(node, 0);
- writel(0, base + TIMER_CTRL);
- integrator_clockevent_init(rate, base, irq);
-}
-
static const struct of_device_id fpga_irq_of_match[] __initconst = {
{ .compatible = "arm,versatile-fpga-irq", .data = fpga_irq_of_init, },
{ /* Sentinel */ }
@@ -582,7 +416,6 @@ DT_MACHINE_START(INTEGRATOR_AP_DT, "ARM Integrator/AP (Device Tree)")
.init_early = ap_init_early,
.init_irq = ap_init_irq_of,
.handle_irq = fpga_handle_irq,
- .init_time = ap_of_timer_init,
.init_machine = ap_init_of,
.restart = integrator_restart,
.dt_compat = ap_dt_board_compat,
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 5729c3d..b5c7a7b 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -28,6 +28,7 @@
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/sys_soc.h>
+#include <clocksource/timer-sp.h>
#include <mach/hardware.h>
#include <mach/platform.h>
@@ -44,8 +45,6 @@
#include <asm/mach/map.h>
#include <asm/mach/time.h>
-#include <asm/hardware/timer-sp.h>
-
#include <plat/clcd.h>
#include <plat/sched_clock.h>
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 8ce6366..2009f8f 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -31,6 +31,7 @@
#include <linux/amba/mmci.h>
#include <linux/gfp.h>
#include <linux/mtd/physmap.h>
+#include <clocksource/timer-sp.h>
#include <mach/hardware.h>
#include <asm/irq.h>
@@ -41,10 +42,8 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
-
#include <mach/platform.h>
#include <mach/irqs.h>
-#include <asm/hardware/timer-sp.h>
#include <plat/clcd.h>
#include <plat/sched_clock.h>
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index 5cdfc87..56ec027 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -38,6 +38,7 @@
#include <linux/clkdev.h>
#include <linux/mtd/physmap.h>
#include <linux/bitops.h>
+#include <clocksource/timer-sp.h>
#include <asm/irq.h>
#include <asm/hardware/icst.h>
@@ -49,7 +50,6 @@
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/platform.h>
-#include <asm/hardware/timer-sp.h>
#include <plat/clcd.h>
#include <plat/sched_clock.h>
diff --git a/arch/arm/mach-vexpress/ct-ca9x4.c b/arch/arm/mach-vexpress/ct-ca9x4.c
index 6f34497..8cce326 100644
--- a/arch/arm/mach-vexpress/ct-ca9x4.c
+++ b/arch/arm/mach-vexpress/ct-ca9x4.c
@@ -11,16 +11,14 @@
#include <linux/clkdev.h>
#include <linux/vexpress.h>
#include <linux/irqchip/arm-gic.h>
+#include <clocksource/timer-sp.h>
-#include <asm/hardware/arm_timer.h>
#include <asm/hardware/cache-l2x0.h>
#include <asm/smp_scu.h>
#include <asm/smp_twd.h>
#include <mach/ct-ca9x4.h>
-#include <asm/hardware/timer-sp.h>
-
#include <asm/mach/map.h>
#include <asm/mach/time.h>
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 09e571d..fb4cdc6 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -23,15 +23,14 @@
#include <linux/regulator/fixed.h>
#include <linux/regulator/machine.h>
#include <linux/vexpress.h>
+#include <clocksource/timer-sp.h>
#include <asm/mach-types.h>
#include <asm/sizes.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include <asm/mach/time.h>
-#include <asm/hardware/arm_timer.h>
#include <asm/hardware/cache-l2x0.h>
-#include <asm/hardware/timer-sp.h>
#include <mach/ct-ca9x4.h>
#include <mach/motherboard.h>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index d98e7e1..00aa4cd 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -25,6 +25,18 @@ config DW_APB_TIMER_OF
config ARMADA_370_XP_TIMER
bool
+config ARM_TIMER_SP804
+ bool
+ depends on ARM
+ select CLKSRC_MMIO
+ select CLKSRC_OF if OF
+ select HAVE_SCHED_CLOCK
+
+config INTEGRATOR_AP_TIMER
+ bool
+ depends on ARM
+ select CLKSRC_OF if OF
+
config SUNXI_TIMER
bool
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 4d8283a..9f3b62b 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -14,8 +14,10 @@ obj-$(CONFIG_DW_APB_TIMER) += dw_apb_timer.o
obj-$(CONFIG_DW_APB_TIMER_OF) += dw_apb_timer_of.o
obj-$(CONFIG_CLKSRC_NOMADIK_MTU) += nomadik-mtu.o
obj-$(CONFIG_CLKSRC_DBX500_PRCMU) += clksrc-dbx500-prcmu.o
+obj-$(CONFIG_ARM_TIMER_SP804) += timer-sp.o
obj-$(CONFIG_ARMADA_370_XP_TIMER) += time-armada-370-xp.o
obj-$(CONFIG_ARCH_BCM2835) += bcm2835_timer.o
+obj-$(CONFIG_INTEGRATOR_AP_TIMER) += integrator_ap_timer.o
obj-$(CONFIG_SUNXI_TIMER) += sunxi_timer.o
obj-$(CONFIG_ARCH_TEGRA) += tegra20_timer.o
obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o
diff --git a/arch/arm/include/asm/hardware/arm_timer.h b/drivers/clocksource/arm_timer.h
similarity index 89%
rename from arch/arm/include/asm/hardware/arm_timer.h
rename to drivers/clocksource/arm_timer.h
index d6030ff..3d3f679 100644
--- a/arch/arm/include/asm/hardware/arm_timer.h
+++ b/drivers/clocksource/arm_timer.h
@@ -1,5 +1,5 @@
-#ifndef __ASM_ARM_HARDWARE_ARM_TIMER_H
-#define __ASM_ARM_HARDWARE_ARM_TIMER_H
+#ifndef __CLOCKSOURCE_ARM_TIMER_H
+#define __CLOCKSOURCE_ARM_TIMER_H
/*
* ARM timer implementation, found in Integrator, Versatile and Realview
@@ -12,8 +12,6 @@
*
* Every SP804 contains two identical timers.
*/
-#define TIMER_1_BASE 0x00
-#define TIMER_2_BASE 0x20
#define TIMER_LOAD 0x00 /* ACVR rw */
#define TIMER_VALUE 0x04 /* ACVR ro */
diff --git a/drivers/clocksource/integrator_ap_timer.c b/drivers/clocksource/integrator_ap_timer.c
new file mode 100644
index 0000000..75eb6c9
--- /dev/null
+++ b/drivers/clocksource/integrator_ap_timer.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (C) 2000-2003 Deep Blue Solutions Ltd
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/clk.h>
+#include <linux/of_irq.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+
+#include <asm/sched_clock.h>
+
+#include "arm_timer.h"
+
+static unsigned long timer_reload;
+static void __iomem *clksrc_base;
+
+static u32 notrace integrator_read_sched_clock(void)
+{
+ return -readl(clksrc_base + TIMER_VALUE);
+}
+
+void __init integrator_clocksource_init(unsigned long inrate,
+ void __iomem *base)
+{
+ u32 ctrl = TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC;
+ unsigned long rate = inrate;
+
+ clksrc_base = base;
+
+ if (rate >= 1500000) {
+ rate /= 16;
+ ctrl |= TIMER_CTRL_DIV16;
+ }
+
+ writel(0xffff, base + TIMER_LOAD);
+ writel(ctrl, base + TIMER_CTRL);
+
+ clocksource_mmio_init(base + TIMER_VALUE, "timer2",
+ rate, 200, 16, clocksource_mmio_readl_down);
+ setup_sched_clock(integrator_read_sched_clock, 16, rate);
+}
+
+static void __iomem * clkevt_base;
+
+/*
+ * IRQ handler for the timer
+ */
+static irqreturn_t integrator_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+
+ /* clear the interrupt */
+ writel(1, clkevt_base + TIMER_INTCLR);
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static void clkevt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt)
+{
+ u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
+
+ /* Disable timer */
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ /* Enable the timer and start the periodic tick */
+ writel(timer_reload, clkevt_base + TIMER_LOAD);
+ ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ /* Leave the timer disabled, .set_next_event will enable it */
+ ctrl &= ~TIMER_CTRL_PERIODIC;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+ break;
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_RESUME:
+ default:
+ /* Just leave in disabled state */
+ break;
+ }
+
+}
+
+static int clkevt_set_next_event(unsigned long next, struct clock_event_device *evt)
+{
+ unsigned long ctrl = readl(clkevt_base + TIMER_CTRL);
+
+ writel(ctrl & ~TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
+ writel(next, clkevt_base + TIMER_LOAD);
+ writel(ctrl | TIMER_CTRL_ENABLE, clkevt_base + TIMER_CTRL);
+
+ return 0;
+}
+
+static struct clock_event_device integrator_clockevent = {
+ .name = "timer1",
+ .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
+ .set_mode = clkevt_set_mode,
+ .set_next_event = clkevt_set_next_event,
+ .rating = 300,
+};
+
+static struct irqaction integrator_timer_irq = {
+ .name = "timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = integrator_timer_interrupt,
+ .dev_id = &integrator_clockevent,
+};
+
+void __init integrator_clockevent_init(unsigned long inrate,
+ void __iomem *base, int irq)
+{
+ unsigned long rate = inrate;
+ unsigned int ctrl = 0;
+
+ clkevt_base = base;
+ /* Calculate and program a divisor */
+ if (rate > 0x100000 * HZ) {
+ rate /= 256;
+ ctrl |= TIMER_CTRL_DIV256;
+ } else if (rate > 0x10000 * HZ) {
+ rate /= 16;
+ ctrl |= TIMER_CTRL_DIV16;
+ }
+ timer_reload = rate / HZ;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+
+ setup_irq(irq, &integrator_timer_irq);
+ clockevents_config_and_register(&integrator_clockevent,
+ rate,
+ 1,
+ 0xffffU);
+}
+
+static void __init ap_of_timer_init(struct device_node *node)
+{
+ static int init_cnt = 0;
+ void __iomem *base;
+ int irq;
+ struct clk *clk;
+ unsigned long rate;
+
+ if ((init_cnt == 2) || !of_device_is_available(node))
+ return;
+
+ clk = clk_get_sys("ap_timer", NULL);
+ BUG_ON(IS_ERR(clk));
+ clk_prepare_enable(clk);
+ rate = clk_get_rate(clk);
+
+ base = of_iomap(node, 0);
+ if (WARN_ON(!base))
+ return;
+
+ writel(0, base + TIMER_CTRL);
+
+ if (!init_cnt) {
+ irq = irq_of_parse_and_map(node, 0);
+ integrator_clockevent_init(rate, base, irq);
+ } else
+ integrator_clocksource_init(rate, base);
+
+ init_cnt++;
+}
+CLOCKSOURCE_OF_DECLARE(integrator_ap, "integrator-timer", ap_of_timer_init);
diff --git a/arch/arm/common/timer-sp.c b/drivers/clocksource/timer-sp.c
similarity index 98%
rename from arch/arm/common/timer-sp.c
rename to drivers/clocksource/timer-sp.c
index 203a2b3..91b12e3 100644
--- a/arch/arm/common/timer-sp.c
+++ b/drivers/clocksource/timer-sp.c
@@ -1,6 +1,4 @@
/*
- * linux/arch/arm/common/timer-sp.c
- *
* Copyright (C) 1999 - 2003 ARM Limited
* Copyright (C) 2000 Deep Blue Solutions Ltd
*
@@ -28,10 +26,11 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
+#include <clocksource/timer-sp.h>
#include <asm/sched_clock.h>
-#include <asm/hardware/arm_timer.h>
-#include <asm/hardware/timer-sp.h>
+
+#include "arm_timer.h"
static long __init sp804_get_clock_rate(struct clk *clk)
{
@@ -283,4 +282,4 @@ static void __init integrator_cp_of_init(struct device_node *np)
init_count++;
}
-CLOCKSOURCE_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init);
\ No newline at end of file
+CLOCKSOURCE_OF_DECLARE(intcp, "arm,integrator-cp-timer", integrator_cp_of_init);
diff --git a/include/clocksource/integrator_ap_timer.h b/include/clocksource/integrator_ap_timer.h
new file mode 100644
index 0000000..2f585fc
--- /dev/null
+++ b/include/clocksource/integrator_ap_timer.h
@@ -0,0 +1,7 @@
+#ifndef __CLOCKSOURCE_INTEGRATOR_AP_TIMER
+#define __CLOCKSOURCE_INTEGRATOR_AP_TIMER
+
+void integrator_clocksource_init(unsigned long inrate, void __iomem *base);
+void integrator_clockevent_init(unsigned long inrate, void __iomem *base, int irq);
+
+#endif
diff --git a/arch/arm/include/asm/hardware/timer-sp.h b/include/clocksource/timer-sp.h
similarity index 84%
rename from arch/arm/include/asm/hardware/timer-sp.h
rename to include/clocksource/timer-sp.h
index bb28af7..f59dc9c 100644
--- a/arch/arm/include/asm/hardware/timer-sp.h
+++ b/include/clocksource/timer-sp.h
@@ -1,3 +1,9 @@
+#ifndef __CLOCKSOURCE_TIMER_SP
+#define __CLOCKSOURCE_TIMER_SP
+
+#define TIMER_1_BASE 0x00
+#define TIMER_2_BASE 0x20
+
struct clk;
void __sp804_clocksource_and_sched_clock_init(void __iomem *,
@@ -21,3 +27,5 @@ static inline void sp804_clockevents_init(void __iomem *base, unsigned int irq,
__sp804_clockevents_init(base, irq, NULL, name);
}
+
+#endif
--
1.7.10.4
next prev parent reply other threads:[~2013-03-20 22:54 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-20 22:54 [PATCH 00/11] sp804 and integrator timer CLKSRC_OF support Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` [PATCH 01/11] OF: add empty of_device_is_available for !OF Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-21 14:18 ` Mark Rutland
2013-03-21 14:18 ` Mark Rutland
2013-03-21 14:26 ` Rob Herring
2013-03-21 14:26 ` Rob Herring
2013-03-20 22:54 ` [PATCH 02/11] ARM: remove extra timer-sp control register clearing Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-21 17:58 ` Linus Walleij
2013-03-21 17:58 ` Linus Walleij
2013-03-21 18:03 ` Rob Herring
2013-03-21 18:03 ` Rob Herring
2013-03-21 18:03 ` Rob Herring
2013-03-21 19:23 ` Russell King - ARM Linux
2013-03-21 19:23 ` Russell King - ARM Linux
2013-03-22 2:36 ` Rob Herring
2013-03-22 2:36 ` Rob Herring
2013-03-20 22:54 ` [PATCH 03/11] ARM: timer-sp: convert to use CLKSRC_OF init Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-21 18:02 ` Linus Walleij
2013-03-21 18:02 ` Linus Walleij
2013-03-21 19:35 ` Russell King - ARM Linux
2013-03-21 19:35 ` Russell King - ARM Linux
2013-03-21 19:35 ` Russell King - ARM Linux
2013-03-22 2:31 ` Rob Herring
2013-03-22 2:31 ` Rob Herring
2013-03-22 2:31 ` Rob Herring
2013-03-22 11:49 ` Russell King - ARM Linux
2013-03-22 11:49 ` Russell King - ARM Linux
2013-03-20 22:54 ` [PATCH 04/11] ARM: highbank: use OF init for sp804 timer Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` [PATCH 05/11] ARM: vexpress: remove sp804 OF init Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` [PATCH 06/11] ARM: dts: vexpress: disable CA9 core tile sp804 timer Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` [PATCH 07/11] ARM: versatile: add versatile dtbs to dtbs target Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` [PATCH 08/11] ARM: versatile: use OF init for sp804 timer Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-20 22:54 ` [PATCH 09/11] ARM: integrator-cp: convert use CLKSRC_OF for timer init Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-21 18:07 ` Linus Walleij
2013-03-21 18:07 ` Linus Walleij
2013-03-20 22:54 ` Rob Herring [this message]
2013-03-20 22:54 ` [PATCH 10/11] ARM: move sp804 and integrator timers to drivers/clocksource Rob Herring
2013-03-21 18:15 ` Linus Walleij
2013-03-21 18:15 ` Linus Walleij
2013-03-21 18:15 ` Linus Walleij
2013-03-20 22:54 ` [PATCH 11/11] devtree: add binding documentation for sp804 Rob Herring
2013-03-20 22:54 ` Rob Herring
2013-03-21 19:36 ` Russell King - ARM Linux
2013-03-21 19:36 ` Russell King - ARM Linux
2013-03-21 19:36 ` Russell King - ARM Linux
2013-03-21 13:24 ` [PATCH 00/11] sp804 and integrator timer CLKSRC_OF support Arnd Bergmann
2013-03-21 13:24 ` Arnd Bergmann
2013-03-21 13:24 ` Arnd Bergmann
2013-03-21 14:06 ` Rob Herring
2013-03-21 14:06 ` Rob Herring
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