linux-kernel - [PATCH 7/9] ARM: at91/gpio: add .to_irq gpio

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Date:	Mon, 13 Feb 2012 15:43:07 +0100
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	plagnioj@...osoft.com, linux-arm-kernel@...ts.infradead.org,
	grant.likely@...retlab.ca, rob.herring@...xeda.com
Cc:	tglx@...utronix.de, devicetree-discuss@...ts.ozlabs.org,
	avictor.za@...il.com, linux-kernel@...r.kernel.org,
	Nicolas Ferre <nicolas.ferre@...el.com>
Subject: [PATCH 7/9] ARM: at91/gpio: add .to_irq gpio_chip handler

Replace the gpio_to_irq() macro by a plain gpiolib .to_irq() handler.
This call is using the irqdomain to translate hardware to Linux
IRQ numbers.
The irq_to_gpio() macro is completely removed.

Signed-off-by: Nicolas Ferre <nicolas.ferre@...el.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
---
 arch/arm/mach-at91/gpio.c              |   13 +++++++++++++
 arch/arm/mach-at91/include/mach/gpio.h |   12 ------------
 2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index 0dc3f5e..e8f5831 100644
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -11,6 +11,7 @@
 
 #include <linux/clk.h>
 #include <linux/errno.h>
+#include <linux/device.h>
 #include <linux/gpio.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
@@ -48,6 +49,7 @@ static int at91_gpiolib_direction_output(struct gpio_chip *chip,
 					 unsigned offset, int val);
 static int at91_gpiolib_direction_input(struct gpio_chip *chip,
 					unsigned offset);
+static int at91_gpiolib_to_irq(struct gpio_chip *chip, unsigned offset);
 
 #define AT91_GPIO_CHIP(name, base_gpio, nr_gpio)			\
 	{								\
@@ -59,6 +61,7 @@ static int at91_gpiolib_direction_input(struct gpio_chip *chip,
 			.set		  = at91_gpiolib_set,		\
 			.dbg_show	  = at91_gpiolib_dbg_show,	\
 			.base		  = base_gpio,			\
+			.to_irq		  = at91_gpiolib_to_irq,	\
 			.ngpio		  = nr_gpio,			\
 		},							\
 	}
@@ -640,6 +643,16 @@ static void at91_gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip)
 	}
 }
 
+static int at91_gpiolib_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+	int virq = irq_find_mapping(at91_gpio->domain, offset);
+
+	dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n",
+				chip->label, offset + chip->base, virq);
+	return virq;
+}
+
 static int __init at91_gpio_setup_clk(int idx)
 {
 	struct at91_gpio_chip *at91_gpio = &gpio_chip[idx];
diff --git a/arch/arm/mach-at91/include/mach/gpio.h b/arch/arm/mach-at91/include/mach/gpio.h
index e3fd225..7cf009b 100644
--- a/arch/arm/mach-at91/include/mach/gpio.h
+++ b/arch/arm/mach-at91/include/mach/gpio.h
@@ -204,18 +204,6 @@ extern int at91_get_gpio_value(unsigned pin);
 extern void at91_gpio_suspend(void);
 extern void at91_gpio_resume(void);
 
-/*-------------------------------------------------------------------------*/
-
-/* wrappers for "new style" GPIO calls. the old AT91-specific ones should
- * eventually be removed (along with this errno.h inclusion), and the
- * gpio request/free calls should probably be implemented.
- */
-
-#include <asm/errno.h>
-
-#define gpio_to_irq(gpio) (gpio + NR_AIC_IRQS)
-#define irq_to_gpio(irq)  (irq - NR_AIC_IRQS)
-
 #endif	/* __ASSEMBLY__ */
 
 #endif
-- 
1.7.9

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