[PATCH v5 0/3] Fix lubbock and mainstone interrupts

[PATCH v5 0/3] Fix lubbock and mainstone interrupts

[Robert Jarzmik]

This serie was submitted to the lak list, then migrated to mfd drivers, to end
up again here. There was no change since last submission. Let's hope this is the
last spin and that these platform will be fixed at last.

Robert Jarzmik (3):
  ARM: pxa: pxa_cplds: add lubbock and mainstone IO
  ARM: pxa: mainstone: use new pxa_cplds driver
  ARM: pxa: lubbock: use new pxa_cplds driver

 arch/arm/mach-pxa/Kconfig                  |  10 ++
 arch/arm/mach-pxa/Makefile                 |   1 +
 arch/arm/mach-pxa/include/mach/lubbock.h   |   7 +-
 arch/arm/mach-pxa/include/mach/mainstone.h |   6 +-
 arch/arm/mach-pxa/lubbock.c                | 108 +++++-----------
 arch/arm/mach-pxa/mainstone.c              | 115 ++++-------------
 arch/arm/mach-pxa/pxa_cplds_irqs.c         | 200 +++++++++++++++++++++++++++++
 7 files changed, 275 insertions(+), 172 deletions(-)
 create mode 100644 arch/arm/mach-pxa/pxa_cplds_irqs.c

-- 
2.1.4

[PATCH v5 1/3] ARM: pxa: pxa_cplds: add lubbock and mainstone IO

[Robert Jarzmik]

Historically, this support was in arch/arm/mach-pxa/lubbock.c and
arch/arm/mach-pxa/mainstone.c. When gpio-pxa was moved to drivers/pxa,
it became a driver, and its initialization and probing happened at
postcore initcall. The lubbock code used to install the chained lubbock
interrupt handler at init_irq() time.

The consequence of the gpio-pxa change is that the installed chained irq
handler lubbock_irq_handler() was overwritten in pxa_gpio_probe(_dt)(),
removing :
 - the handler
 - the falling edge detection setting of GPIO0, which revealed the
   interrupt request from the lubbock IO board.

As a fix, move the gpio0 chained handler setup to a place where we have
the guarantee that pxa_gpio_probe() was called before, so that lubbock
handler becomes the true IRQ chained handler of GPIO0, demuxing the
lubbock IO board interrupts.

This patch moves all that handling to a mfd driver. It's only purpose
for the time being is the interrupt handling, but in the future it
should encompass all the motherboard CPLDs handling :
 - leds
 - switches
 - hexleds

The same logic applies to mainstone board.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
---
Since v1: change the name from cottula to lubbock_io
            Dmitry pointed out the Cottula was the pxa25x family name,
	    lubbock was the pxa25x development board name. Therefore the
	    name was changed to lubbock_io (lubbock IO board)
	  change the resources to bi-irq ioresource
	    Discussion between Arnd and Robert to change the gpio
	    request by a irq request.
Since v2: take into account Mark's review
      	    Use irq flags from resources (DT case and pdata case).
	    Change of name from lubbock_io to lubbock-io
Since v3: take into account Lee's review + Russell's advice
            whitespace errors fixes
	    debug/info messages formatting
	    return X; empty lines
Since v4: move back to mach-pxa tree
---
 arch/arm/mach-pxa/Kconfig          |  10 ++
 arch/arm/mach-pxa/Makefile         |   1 +
 arch/arm/mach-pxa/pxa_cplds_irqs.c | 200 +++++++++++++++++++++++++++++++++++++
 3 files changed, 211 insertions(+)
 create mode 100644 arch/arm/mach-pxa/pxa_cplds_irqs.c

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index 8896e71..58c13a12 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -691,4 +691,14 @@ config SHARPSL_PM_MAX1111
 config PXA310_ULPI
 	bool
 
+config PXA_SYSTEMS_CPLDS
+	bool "Motherboard cplds"
+	def_bool ARCH_LUBBOCK || MACH_MAINSTONE
+	select MFD_CORE
+	help
+	  This driver supports the Lubbock and Mainstone multifunction chip
+	  found on the pxa25x development platform system (Lubbock) and pxa27x
+	  development platform system (Mainstone). This IO board supports the
+	  interrupts handling, ethernet controller, flash chips, etc ...
+
 endif
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index eb0bf76..4087d33 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -90,4 +90,5 @@ obj-$(CONFIG_MACH_RAUMFELD_CONNECTOR)	+= raumfeld.o
 obj-$(CONFIG_MACH_RAUMFELD_SPEAKER)	+= raumfeld.o
 obj-$(CONFIG_MACH_ZIPIT2)	+= z2.o
 
+obj-$(CONFIG_PXA_SYSTEMS_CPLDS)	+= pxa_cplds_irqs.o
 obj-$(CONFIG_TOSA_BT)		+= tosa-bt.o
diff --git a/arch/arm/mach-pxa/pxa_cplds_irqs.c b/arch/arm/mach-pxa/pxa_cplds_irqs.c
new file mode 100644
index 0000000..f1aeb54
--- /dev/null
+++ b/arch/arm/mach-pxa/pxa_cplds_irqs.c
@@ -0,0 +1,200 @@
+/*
+ * Intel Reference Systems cplds
+ *
+ * Copyright (C) 2014 Robert Jarzmik
+ *
+ * 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.
+ *
+ * Cplds motherboard driver, supporting lubbock and mainstone SoC board.
+ */
+
+#include <linux/bitops.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/mfd/core.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+
+#define FPGA_IRQ_MASK_EN 0x0
+#define FPGA_IRQ_SET_CLR 0x10
+
+#define CPLDS_NB_IRQ	32
+
+struct cplds {
+	void __iomem *base;
+	int irq;
+	unsigned int irq_mask;
+	struct gpio_desc *gpio0;
+	struct irq_domain *irqdomain;
+};
+
+static irqreturn_t cplds_irq_handler(int in_irq, void *d)
+{
+	struct cplds *fpga = d;
+	unsigned long pending;
+	unsigned int bit;
+
+	pending = readl(fpga->base + FPGA_IRQ_SET_CLR) & fpga->irq_mask;
+	for_each_set_bit(bit, &pending, CPLDS_NB_IRQ)
+		generic_handle_irq(irq_find_mapping(fpga->irqdomain, bit));
+
+	return IRQ_HANDLED;
+}
+
+static void cplds_irq_mask_ack(struct irq_data *d)
+{
+	struct cplds *fpga = irq_data_get_irq_chip_data(d);
+	unsigned int cplds_irq = irqd_to_hwirq(d);
+	unsigned int set, bit = BIT(cplds_irq);
+
+	fpga->irq_mask &= ~bit;
+	writel(fpga->irq_mask, fpga->base + FPGA_IRQ_MASK_EN);
+	set = readl(fpga->base + FPGA_IRQ_SET_CLR);
+	writel(set & ~bit, fpga->base + FPGA_IRQ_SET_CLR);
+}
+
+static void cplds_irq_unmask(struct irq_data *d)
+{
+	struct cplds *fpga = irq_data_get_irq_chip_data(d);
+	unsigned int cplds_irq = irqd_to_hwirq(d);
+	unsigned int bit = BIT(cplds_irq);
+
+	fpga->irq_mask |= bit;
+	writel(fpga->irq_mask, fpga->base + FPGA_IRQ_MASK_EN);
+}
+
+static struct irq_chip cplds_irq_chip = {
+	.name		= "pxa_cplds",
+	.irq_mask_ack	= cplds_irq_mask_ack,
+	.irq_unmask	= cplds_irq_unmask,
+	.flags		= IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SKIP_SET_WAKE,
+};
+
+static int cplds_irq_domain_map(struct irq_domain *d, unsigned int irq,
+				   irq_hw_number_t hwirq)
+{
+	struct cplds *fpga = d->host_data;
+
+	irq_set_chip_and_handler(irq, &cplds_irq_chip, handle_level_irq);
+	irq_set_chip_data(irq, fpga);
+
+	return 0;
+}
+
+static const struct irq_domain_ops cplds_irq_domain_ops = {
+	.xlate = irq_domain_xlate_twocell,
+	.map = cplds_irq_domain_map,
+};
+
+static int cplds_resume(struct platform_device *pdev)
+{
+	struct cplds *fpga = platform_get_drvdata(pdev);
+
+	writel(fpga->irq_mask, fpga->base + FPGA_IRQ_MASK_EN);
+
+	return 0;
+}
+
+static int cplds_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct cplds *fpga;
+	int ret;
+	unsigned int base_irq = 0;
+	unsigned long irqflags = 0;
+
+	fpga = devm_kzalloc(&pdev->dev, sizeof(*fpga), GFP_KERNEL);
+	if (!fpga)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (res) {
+		fpga->irq = (unsigned int)res->start;
+		irqflags = res->flags;
+	}
+	if (!fpga->irq)
+		return -ENODEV;
+
+	base_irq = platform_get_irq(pdev, 1);
+	if (base_irq < 0)
+		base_irq = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	fpga->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(fpga->base))
+		return PTR_ERR(fpga->base);
+
+	platform_set_drvdata(pdev, fpga);
+
+	writel(fpga->irq_mask, fpga->base + FPGA_IRQ_MASK_EN);
+	writel(0, fpga->base + FPGA_IRQ_SET_CLR);
+
+	ret = devm_request_irq(&pdev->dev, fpga->irq, cplds_irq_handler,
+			       irqflags, dev_name(&pdev->dev), fpga);
+	if (ret == -ENOSYS)
+		return -EPROBE_DEFER;
+
+	if (ret) {
+		dev_err(&pdev->dev, "couldn't request main irq%d: %d\n",
+			fpga->irq, ret);
+		return ret;
+	}
+
+	irq_set_irq_wake(fpga->irq, 1);
+	fpga->irqdomain = irq_domain_add_linear(pdev->dev.of_node,
+					       CPLDS_NB_IRQ,
+					       &cplds_irq_domain_ops, fpga);
+	if (!fpga->irqdomain)
+		return -ENODEV;
+
+	if (base_irq) {
+		ret = irq_create_strict_mappings(fpga->irqdomain, base_irq, 0,
+						 CPLDS_NB_IRQ);
+		if (ret) {
+			dev_err(&pdev->dev, "couldn't create the irq mapping %d..%d\n",
+				base_irq, base_irq + CPLDS_NB_IRQ);
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int cplds_remove(struct platform_device *pdev)
+{
+	struct cplds *fpga = platform_get_drvdata(pdev);
+
+	irq_set_chip_and_handler(fpga->irq, NULL, NULL);
+
+	return 0;
+}
+
+static const struct of_device_id cplds_id_table[] = {
+	{ .compatible = "intel,lubbock-cplds-irqs", },
+	{ .compatible = "intel,mainstone-cplds-irqs", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cplds_id_table);
+
+static struct platform_driver cplds_driver = {
+	.driver		= {
+		.name	= "pxa_cplds_irqs",
+		.of_match_table = of_match_ptr(cplds_id_table),
+	},
+	.probe		= cplds_probe,
+	.remove		= cplds_remove,
+	.resume		= cplds_resume,
+};
+
+module_platform_driver(cplds_driver);
+
+MODULE_DESCRIPTION("PXA Cplds interrupts driver");
+MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
+MODULE_LICENSE("GPL");
-- 
2.1.4

Re: [PATCH v5 1/3] ARM: pxa: pxa_cplds: add lubbock and mainstone IO

[Paul Bolle]

On Sat, 2015-04-25 at 23:13 +0200, Robert Jarzmik wrote:
> --- a/arch/arm/mach-pxa/Kconfig
> +++ b/arch/arm/mach-pxa/Kconfig
 
> +config PXA_SYSTEMS_CPLDS
> +	bool "Motherboard cplds"
> +	def_bool ARCH_LUBBOCK || MACH_MAINSTONE

Just
	default ARCH_LUBBOCK || MACH_MAINSTONE

should be enough.

> +	select MFD_CORE
> +	help
> +	  This driver supports the Lubbock and Mainstone multifunction chip
> +	  found on the pxa25x development platform system (Lubbock) and pxa27x
> +	  development platform system (Mainstone). This IO board supports the
> +	  interrupts handling, ethernet controller, flash chips, etc ...

> --- a/arch/arm/mach-pxa/Makefile
> +++ b/arch/arm/mach-pxa/Makefile
 
> +obj-$(CONFIG_PXA_SYSTEMS_CPLDS)	+= pxa_cplds_irqs.o

PXA_SYSTEMS_CPLDS is a bool symbol, so pxa_cplds_irqs.o will never be
part of a module, correct?

> --- /dev/null
> +++ b/arch/arm/mach-pxa/pxa_cplds_irqs.c

> +#include <linux/module.h>

Since this is built-in only code this include is probably unneeded.

> +MODULE_DEVICE_TABLE(of, cplds_id_table);

MODULE_DEVICE_TABLE() will be preprocessed away for built-in only code.

> +module_platform_driver(cplds_driver);

Speaking from memory: for built-in only code this is equivalent to
having a wrapper that only calls
	platform_driver_register(&cplds_driver);

and have that wrapper marked as
	device_initcall()

> +MODULE_DESCRIPTION("PXA Cplds interrupts driver");
> +MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
> +MODULE_LICENSE("GPL");

These three macros will effectively be preprocessed away for built-in
only code.

Thanks,


Paul Bolle

Re: [PATCH v5 1/3] ARM: pxa: pxa_cplds: add lubbock and mainstone IO

[Robert Jarzmik]

Paul Bolle <pebolle@tiscali.nl> writes:

> On Sat, 2015-04-25 at 23:13 +0200, Robert Jarzmik wrote:
>> --- a/arch/arm/mach-pxa/Kconfig
>> +++ b/arch/arm/mach-pxa/Kconfig
>  
>> +config PXA_SYSTEMS_CPLDS
>> +	bool "Motherboard cplds"
>> +	def_bool ARCH_LUBBOCK || MACH_MAINSTONE
>
> Just
> 	default ARCH_LUBBOCK || MACH_MAINSTONE
>
> should be enough.
Actually this will become a tristate, and I'll take your "default"
suggestion. For v2.

>> +	select MFD_CORE
Ah this is an oversight now I see it. In the move from drivers/mfd to arch/arm I
forgot to remove this. For v2 also.

>> +	help
>> +	  This driver supports the Lubbock and Mainstone multifunction chip
>> +	  found on the pxa25x development platform system (Lubbock) and pxa27x
>> +	  development platform system (Mainstone). This IO board supports the
>> +	  interrupts handling, ethernet controller, flash chips, etc ...
>
>> --- a/arch/arm/mach-pxa/Makefile
>> +++ b/arch/arm/mach-pxa/Makefile
>  
>> +obj-$(CONFIG_PXA_SYSTEMS_CPLDS)	+= pxa_cplds_irqs.o
>
> PXA_SYSTEMS_CPLDS is a bool symbol, so pxa_cplds_irqs.o will never be
> part of a module, correct?
Euh no, this another mistake of mine, it should capable of being a module, to
enable the lubbock/mainstone generic device tree support. I'll fix that for v2
also.

I removed the below comments as the built-in is an error of mine.

Thanks for the review Paul.

Cheers.

-- 
Robert

[PATCH v5 2/3] ARM: pxa: mainstone: use new pxa_cplds driver

[Robert Jarzmik]

As the interrupt handling was transferred to the pxa_cplds driver,
make the switch in mainstone platform code.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
---
 arch/arm/mach-pxa/include/mach/mainstone.h |   6 +-
 arch/arm/mach-pxa/mainstone.c              | 115 +++++++----------------------
 2 files changed, 31 insertions(+), 90 deletions(-)

diff --git a/arch/arm/mach-pxa/include/mach/mainstone.h b/arch/arm/mach-pxa/include/mach/mainstone.h
index 1bfc4e8..e82a7d3 100644
--- a/arch/arm/mach-pxa/include/mach/mainstone.h
+++ b/arch/arm/mach-pxa/include/mach/mainstone.h
@@ -120,7 +120,9 @@
 #define MST_PCMCIA_PWR_VCC_50   0x4	   /* voltage VCC = 5.0V */
 
 /* board specific IRQs */
-#define MAINSTONE_IRQ(x)	(IRQ_BOARD_START + (x))
+#define MAINSTONE_NR_IRQS	IRQ_BOARD_START
+
+#define MAINSTONE_IRQ(x)	(MAINSTONE_NR_IRQS + (x))
 #define MAINSTONE_MMC_IRQ	MAINSTONE_IRQ(0)
 #define MAINSTONE_USIM_IRQ	MAINSTONE_IRQ(1)
 #define MAINSTONE_USBC_IRQ	MAINSTONE_IRQ(2)
@@ -136,6 +138,4 @@
 #define MAINSTONE_S1_STSCHG_IRQ	MAINSTONE_IRQ(14)
 #define MAINSTONE_S1_IRQ	MAINSTONE_IRQ(15)
 
-#define MAINSTONE_NR_IRQS	(IRQ_BOARD_START + 16)
-
 #endif
diff --git a/arch/arm/mach-pxa/mainstone.c b/arch/arm/mach-pxa/mainstone.c
index 78b84c0..2c0658c 100644
--- a/arch/arm/mach-pxa/mainstone.c
+++ b/arch/arm/mach-pxa/mainstone.c
@@ -13,6 +13,7 @@
  *  published by the Free Software Foundation.
  */
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/syscore_ops.h>
@@ -122,92 +123,6 @@ static unsigned long mainstone_pin_config[] = {
 	GPIO1_GPIO | WAKEUP_ON_EDGE_BOTH,
 };
 
-static unsigned long mainstone_irq_enabled;
-
-static void mainstone_mask_irq(struct irq_data *d)
-{
-	int mainstone_irq = (d->irq - MAINSTONE_IRQ(0));
-	MST_INTMSKENA = (mainstone_irq_enabled &= ~(1 << mainstone_irq));
-}
-
-static void mainstone_unmask_irq(struct irq_data *d)
-{
-	int mainstone_irq = (d->irq - MAINSTONE_IRQ(0));
-	/* the irq can be acknowledged only if deasserted, so it's done here */
-	MST_INTSETCLR &= ~(1 << mainstone_irq);
-	MST_INTMSKENA = (mainstone_irq_enabled |= (1 << mainstone_irq));
-}
-
-static struct irq_chip mainstone_irq_chip = {
-	.name		= "FPGA",
-	.irq_ack	= mainstone_mask_irq,
-	.irq_mask	= mainstone_mask_irq,
-	.irq_unmask	= mainstone_unmask_irq,
-};
-
-static void mainstone_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
-	unsigned long pending = MST_INTSETCLR & mainstone_irq_enabled;
-	do {
-		/* clear useless edge notification */
-		desc->irq_data.chip->irq_ack(&desc->irq_data);
-		if (likely(pending)) {
-			irq = MAINSTONE_IRQ(0) + __ffs(pending);
-			generic_handle_irq(irq);
-		}
-		pending = MST_INTSETCLR & mainstone_irq_enabled;
-	} while (pending);
-}
-
-static void __init mainstone_init_irq(void)
-{
-	int irq;
-
-	pxa27x_init_irq();
-
-	/* setup extra Mainstone irqs */
-	for(irq = MAINSTONE_IRQ(0); irq <= MAINSTONE_IRQ(15); irq++) {
-		irq_set_chip_and_handler(irq, &mainstone_irq_chip,
-					 handle_level_irq);
-		if (irq == MAINSTONE_IRQ(10) || irq == MAINSTONE_IRQ(14))
-			set_irq_flags(irq, IRQF_VALID | IRQF_PROBE | IRQF_NOAUTOEN);
-		else
-			set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-	}
-	set_irq_flags(MAINSTONE_IRQ(8), 0);
-	set_irq_flags(MAINSTONE_IRQ(12), 0);
-
-	MST_INTMSKENA = 0;
-	MST_INTSETCLR = 0;
-
-	irq_set_chained_handler(PXA_GPIO_TO_IRQ(0), mainstone_irq_handler);
-	irq_set_irq_type(PXA_GPIO_TO_IRQ(0), IRQ_TYPE_EDGE_FALLING);
-}
-
-#ifdef CONFIG_PM
-
-static void mainstone_irq_resume(void)
-{
-	MST_INTMSKENA = mainstone_irq_enabled;
-}
-
-static struct syscore_ops mainstone_irq_syscore_ops = {
-	.resume = mainstone_irq_resume,
-};
-
-static int __init mainstone_irq_device_init(void)
-{
-	if (machine_is_mainstone())
-		register_syscore_ops(&mainstone_irq_syscore_ops);
-
-	return 0;
-}
-
-device_initcall(mainstone_irq_device_init);
-
-#endif
-
-
 static struct resource smc91x_resources[] = {
 	[0] = {
 		.start	= (MST_ETH_PHYS + 0x300),
@@ -487,11 +402,37 @@ static struct platform_device mst_gpio_keys_device = {
 	},
 };
 
+static struct resource mst_cplds_resources[] = {
+	[0] = {
+		.start	= MST_FPGA_PHYS + 0xc0,
+		.end	= MST_FPGA_PHYS + 0xe0 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= PXA_GPIO_TO_IRQ(0),
+		.end	= PXA_GPIO_TO_IRQ(0),
+		.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
+	},
+	[2] = {
+		.start	= MAINSTONE_IRQ(0),
+		.end	= MAINSTONE_IRQ(15),
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device mst_cplds_device = {
+	.name		= "pxa_cplds_irqs",
+	.id		= -1,
+	.resource	= &mst_cplds_resources[0],
+	.num_resources	= 3,
+};
+
 static struct platform_device *platform_devices[] __initdata = {
 	&smc91x_device,
 	&mst_flash_device[0],
 	&mst_flash_device[1],
 	&mst_gpio_keys_device,
+	&mst_cplds_device,
 };
 
 static struct pxaohci_platform_data mainstone_ohci_platform_data = {
@@ -718,7 +659,7 @@ MACHINE_START(MAINSTONE, "Intel HCDDBBVA0 Development Platform (aka Mainstone)")
 	.atag_offset	= 0x100,	/* BLOB boot parameter setting */
 	.map_io		= mainstone_map_io,
 	.nr_irqs	= MAINSTONE_NR_IRQS,
-	.init_irq	= mainstone_init_irq,
+	.init_irq	= pxa27x_init_irq,
 	.handle_irq	= pxa27x_handle_irq,
 	.init_time	= pxa_timer_init,
 	.init_machine	= mainstone_init,
-- 
2.1.4

[PATCH v5 3/3] ARM: pxa: lubbock: use new pxa_cplds driver

[Robert Jarzmik]

As the interrupt handling was transferred to the pxa_cplds driver,
make the switch in lubbock platform code.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
---
Since v1: change the name from cottula to lubbock_io
            Dmitry pointed out the Cottula was the pxa25x family name,
	    lubbock was the pxa25x development board name. Therefore the
	    name was changed to lubbock_io (lubbock IO board)
	  change the resources to bi-irq ioresource
	    Discussion between Arnd and Robert to change the gpio
	    request by a irq request.
Since v3: rename lubbock_io into lubbock_cplds
Since v4: rename lubbock_io into pxa_cplds
---
 arch/arm/mach-pxa/include/mach/lubbock.h |   7 +-
 arch/arm/mach-pxa/lubbock.c              | 108 +++++++++----------------------
 2 files changed, 33 insertions(+), 82 deletions(-)

diff --git a/arch/arm/mach-pxa/include/mach/lubbock.h b/arch/arm/mach-pxa/include/mach/lubbock.h
index 958cd6af..1eecf79 100644
--- a/arch/arm/mach-pxa/include/mach/lubbock.h
+++ b/arch/arm/mach-pxa/include/mach/lubbock.h
@@ -37,7 +37,9 @@
 #define LUB_GP			__LUB_REG(LUBBOCK_FPGA_PHYS + 0x100)
 
 /* Board specific IRQs */
-#define LUBBOCK_IRQ(x)		(IRQ_BOARD_START + (x))
+#define LUBBOCK_NR_IRQS		IRQ_BOARD_START
+
+#define LUBBOCK_IRQ(x)		(LUBBOCK_NR_IRQS + (x))
 #define LUBBOCK_SD_IRQ		LUBBOCK_IRQ(0)
 #define LUBBOCK_SA1111_IRQ	LUBBOCK_IRQ(1)
 #define LUBBOCK_USB_IRQ		LUBBOCK_IRQ(2)  /* usb connect */
@@ -47,8 +49,7 @@
 #define LUBBOCK_USB_DISC_IRQ	LUBBOCK_IRQ(6)  /* usb disconnect */
 #define LUBBOCK_LAST_IRQ	LUBBOCK_IRQ(6)
 
-#define LUBBOCK_SA1111_IRQ_BASE	(IRQ_BOARD_START + 16)
-#define LUBBOCK_NR_IRQS		(IRQ_BOARD_START + 16 + 55)
+#define LUBBOCK_SA1111_IRQ_BASE	(LUBBOCK_NR_IRQS + 32)
 
 #ifndef __ASSEMBLY__
 extern void lubbock_set_misc_wr(unsigned int mask, unsigned int set);
diff --git a/arch/arm/mach-pxa/lubbock.c b/arch/arm/mach-pxa/lubbock.c
index d8a1be6..4ac9ab8 100644
--- a/arch/arm/mach-pxa/lubbock.c
+++ b/arch/arm/mach-pxa/lubbock.c
@@ -12,6 +12,7 @@
  *  published by the Free Software Foundation.
  */
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -123,84 +124,6 @@ void lubbock_set_misc_wr(unsigned int mask, unsigned int set)
 }
 EXPORT_SYMBOL(lubbock_set_misc_wr);
 
-static unsigned long lubbock_irq_enabled;
-
-static void lubbock_mask_irq(struct irq_data *d)
-{
-	int lubbock_irq = (d->irq - LUBBOCK_IRQ(0));
-	LUB_IRQ_MASK_EN = (lubbock_irq_enabled &= ~(1 << lubbock_irq));
-}
-
-static void lubbock_unmask_irq(struct irq_data *d)
-{
-	int lubbock_irq = (d->irq - LUBBOCK_IRQ(0));
-	/* the irq can be acknowledged only if deasserted, so it's done here */
-	LUB_IRQ_SET_CLR &= ~(1 << lubbock_irq);
-	LUB_IRQ_MASK_EN = (lubbock_irq_enabled |= (1 << lubbock_irq));
-}
-
-static struct irq_chip lubbock_irq_chip = {
-	.name		= "FPGA",
-	.irq_ack	= lubbock_mask_irq,
-	.irq_mask	= lubbock_mask_irq,
-	.irq_unmask	= lubbock_unmask_irq,
-};
-
-static void lubbock_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
-	unsigned long pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
-	do {
-		/* clear our parent irq */
-		desc->irq_data.chip->irq_ack(&desc->irq_data);
-		if (likely(pending)) {
-			irq = LUBBOCK_IRQ(0) + __ffs(pending);
-			generic_handle_irq(irq);
-		}
-		pending = LUB_IRQ_SET_CLR & lubbock_irq_enabled;
-	} while (pending);
-}
-
-static void __init lubbock_init_irq(void)
-{
-	int irq;
-
-	pxa25x_init_irq();
-
-	/* setup extra lubbock irqs */
-	for (irq = LUBBOCK_IRQ(0); irq <= LUBBOCK_LAST_IRQ; irq++) {
-		irq_set_chip_and_handler(irq, &lubbock_irq_chip,
-					 handle_level_irq);
-		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-	}
-
-	irq_set_chained_handler(PXA_GPIO_TO_IRQ(0), lubbock_irq_handler);
-	irq_set_irq_type(PXA_GPIO_TO_IRQ(0), IRQ_TYPE_EDGE_FALLING);
-}
-
-#ifdef CONFIG_PM
-
-static void lubbock_irq_resume(void)
-{
-	LUB_IRQ_MASK_EN = lubbock_irq_enabled;
-}
-
-static struct syscore_ops lubbock_irq_syscore_ops = {
-	.resume = lubbock_irq_resume,
-};
-
-static int __init lubbock_irq_device_init(void)
-{
-	if (machine_is_lubbock()) {
-		register_syscore_ops(&lubbock_irq_syscore_ops);
-		return 0;
-	}
-	return -ENODEV;
-}
-
-device_initcall(lubbock_irq_device_init);
-
-#endif
-
 static int lubbock_udc_is_connected(void)
 {
 	return (LUB_MISC_RD & (1 << 9)) == 0;
@@ -383,11 +306,38 @@ static struct platform_device lubbock_flash_device[2] = {
 	},
 };
 
+static struct resource lubbock_cplds_resources[] = {
+	[0] = {
+		.start	= LUBBOCK_FPGA_PHYS + 0xc0,
+		.end	= LUBBOCK_FPGA_PHYS + 0xe0 - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {
+		.start	= PXA_GPIO_TO_IRQ(0),
+		.end	= PXA_GPIO_TO_IRQ(0),
+		.flags	= IORESOURCE_IRQ | IORESOURCE_IRQ_LOWEDGE,
+	},
+	[2] = {
+		.start	= LUBBOCK_IRQ(0),
+		.end	= LUBBOCK_IRQ(6),
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device lubbock_cplds_device = {
+	.name		= "pxa_cplds_irqs",
+	.id		= -1,
+	.resource	= &lubbock_cplds_resources[0],
+	.num_resources	= 3,
+};
+
+
 static struct platform_device *devices[] __initdata = {
 	&sa1111_device,
 	&smc91x_device,
 	&lubbock_flash_device[0],
 	&lubbock_flash_device[1],
+	&lubbock_cplds_device,
 };
 
 static struct pxafb_mode_info sharp_lm8v31_mode = {
@@ -648,7 +598,7 @@ MACHINE_START(LUBBOCK, "Intel DBPXA250 Development Platform (aka Lubbock)")
 	/* Maintainer: MontaVista Software Inc. */
 	.map_io		= lubbock_map_io,
 	.nr_irqs	= LUBBOCK_NR_IRQS,
-	.init_irq	= lubbock_init_irq,
+	.init_irq	= pxa25x_init_irq,
 	.handle_irq	= pxa25x_handle_irq,
 	.init_time	= pxa_timer_init,
 	.init_machine	= lubbock_init,
-- 
2.1.4

Re: [PATCH v5 0/3] Fix lubbock and mainstone interrupts

[Arnd Bergmann]

On Saturday 25 April 2015 23:13:20 Robert Jarzmik wrote:
> This serie was submitted to the lak list, then migrated to mfd drivers, to end
> up again here. There was no change since last submission. Let's hope this is the
> last spin and that these platform will be fixed at last.
> 

Should these be marked 'Cc: stable@vger.kernel.org'? Can you also add a 'Fixes'
tag with the commit that introduced the problem?

	Arnd

Re: [PATCH v5 0/3] Fix lubbock and mainstone interrupts

[Robert Jarzmik]

Arnd Bergmann <arnd@arndb.de> writes:

> On Saturday 25 April 2015 23:13:20 Robert Jarzmik wrote:
>> This serie was submitted to the lak list, then migrated to mfd drivers, to end
>> up again here. There was no change since last submission. Let's hope this is the
>> last spin and that these platform will be fixed at last.
>> 
>
> Should these be marked 'Cc: stable@vger.kernel.org'?
I can do this. I thought that 3 patches of 100+ lines, and the fact that these
boards were broken since october 2011 would prevent this serie from reaching the
stable branch.

Well, I'll resubmit with this information, and after comments stage it to my
fixes branch. Let's see what stable tree people will do.

> Can you also add a 'Fixes' tag with the commit that introduced the problem?
Sure.

Cheers.

-- 
Robert

Re: [PATCH v5 0/3] Fix lubbock and mainstone interrupts

[Arnd Bergmann]

On Sunday 26 April 2015 11:31:13 Robert Jarzmik wrote:
> Arnd Bergmann <arnd@arndb.de> writes:
> 
> > On Saturday 25 April 2015 23:13:20 Robert Jarzmik wrote:
> >> This serie was submitted to the lak list, then migrated to mfd drivers, to end
> >> up again here. There was no change since last submission. Let's hope this is the
> >> last spin and that these platform will be fixed at last.
> >> 
> >
> > Should these be marked 'Cc: stable@vger.kernel.org'?
> I can do this. I thought that 3 patches of 100+ lines, and the fact that these
> boards were broken since october 2011 would prevent this serie from reaching the
> stable branch.
> 
> Well, I'll resubmit with this information, and after comments stage it to my
> fixes branch. Let's see what stable tree people will do.
> 
> > Can you also add a 'Fixes' tag with the commit that introduced the problem?
> Sure.

You are right about the size limit, I didn't see how big the patches
actually are. In this case, leave the 'Fixes' tag, but don't add
the Cc to stable.

	Arnd