From 63f385cd1f649b3f4f2d59fc609e051981215fd7 Mon Sep 17 00:00:00 2001
From: Arnaud Patard <arnaud.patard@rtp-net.org>
Date: Tue, 8 Jul 2008 23:07:48 +0100
Subject: [ARM] 5160/1: IOP3XX: gpio/gpiolib support

This patch brings support for gpio/gpiolib framework to Intel IOP3xx
platforms.

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 arch/arm/Kconfig         |  4 ++++
 arch/arm/plat-iop/gpio.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

(limited to 'arch/arm')

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b786e68914d4..63ef7cf852a7 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -299,6 +299,8 @@ config ARCH_IOP32X
 	depends on MMU
 	select PLAT_IOP
 	select PCI
+	select GENERIC_GPIO
+	select HAVE_GPIO_LIB
 	help
 	  Support for Intel's 80219 and IOP32X (XScale) family of
 	  processors.
@@ -308,6 +310,8 @@ config ARCH_IOP33X
 	depends on MMU
 	select PLAT_IOP
 	select PCI
+	select GENERIC_GPIO
+	select HAVE_GPIO_LIB
 	help
 	  Support for Intel's IOP33X (XScale) family of processors.
 
diff --git a/arch/arm/plat-iop/gpio.c b/arch/arm/plat-iop/gpio.c
index eda436083417..640e498c12ef 100644
--- a/arch/arm/plat-iop/gpio.c
+++ b/arch/arm/plat-iop/gpio.c
@@ -11,6 +11,10 @@
  */
 
 #include <linux/device.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
 #include <asm/hardware/iop3xx.h>
 
 void gpio_line_config(int line, int direction)
@@ -46,3 +50,42 @@ void gpio_line_set(int line, int value)
 	local_irq_restore(flags);
 }
 EXPORT_SYMBOL(gpio_line_set);
+
+static int iop3xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+	gpio_line_config(gpio, GPIO_IN);
+	return 0;
+}
+
+static int iop3xx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
+{
+	gpio_line_set(gpio, level);
+	gpio_line_config(gpio, GPIO_OUT);
+	return 0;
+}
+
+static int iop3xx_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+	return gpio_line_get(gpio);
+}
+
+static void iop3xx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
+{
+	gpio_line_set(gpio, value);
+}
+
+static struct gpio_chip iop3xx_chip = {
+	.label			= "iop3xx",
+	.direction_input	= iop3xx_gpio_direction_input,
+	.get			= iop3xx_gpio_get_value,
+	.direction_output	= iop3xx_gpio_direction_output,
+	.set			= iop3xx_gpio_set_value,
+	.base			= 0,
+	.ngpio			= IOP3XX_N_GPIOS,
+};
+
+static int __init iop3xx_gpio_setup(void)
+{
+	return gpiochip_add(&iop3xx_chip);
+}
+arch_initcall(iop3xx_gpio_setup);
-- 
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