This patch adds gpiolib support for the IXP4xx platform
Signed-off-by: Imre Kaloz <[email protected]>
---
arch/arm/Kconfig | 2 +-
arch/arm/mach-ixp4xx/common.c | 39 +++++++++++++++++++++++++
arch/arm/mach-ixp4xx/include/mach/gpio.h | 46 ++++++++++--------------------
3 files changed, 55 insertions(+), 32 deletions(-)
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3269576..e793a75 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -481,7 +481,7 @@ config ARCH_IXP4XX
depends on MMU
select CLKSRC_MMIO
select CPU_XSCALE
- select GENERIC_GPIO
+ select ARCH_REQUIRE_GPIOLIB
select GENERIC_CLOCKEVENTS
select HAVE_SCHED_CLOCK
select MIGHT_HAVE_PCI
diff --git a/arch/arm/mach-ixp4xx/common.c b/arch/arm/mach-ixp4xx/common.c
index 0777257..7603456 100644
--- a/arch/arm/mach-ixp4xx/common.c
+++ b/arch/arm/mach-ixp4xx/common.c
@@ -36,6 +36,7 @@
#include <asm/page.h>
#include <asm/irq.h>
#include <asm/sched_clock.h>
+#include <asm/gpio.h>
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
@@ -375,12 +376,50 @@ static struct platform_device *ixp46x_devices[]
__initdata = {
unsigned long ixp4xx_exp_bus_size;
EXPORT_SYMBOL(ixp4xx_exp_bus_size);
+static int ixp4xx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
+{
+ gpio_line_config(gpio, IXP4XX_GPIO_IN);
+ return 0;
+}
+
+static int ixp4xx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,
int level)
+{
+ gpio_line_set(gpio, level);
+ gpio_line_config(gpio, IXP4XX_GPIO_OUT);
+ return 0;
+}
+
+static int ixp4xx_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
+{
+ int value;
+
+ gpio_line_get(gpio, &value);
+ return value;
+}
+
+static void ixp4xx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int
value)
+{
+ gpio_line_set(gpio, value);
+}
+
+static struct gpio_chip ixp4xx_gpio_chip = {
+ .label = "IXP4XX_GPIO_CHIP",
+ .direction_input = ixp4xx_gpio_direction_input,
+ .direction_output = ixp4xx_gpio_direction_output,
+ .get = ixp4xx_gpio_get_value,
+ .set = ixp4xx_gpio_set_value,
+ .base = 0,
+ .ngpio = 16,
+};
+
void __init ixp4xx_sys_init(void)
{
ixp4xx_exp_bus_size = SZ_16M;
platform_add_devices(ixp4xx_devices, ARRAY_SIZE(ixp4xx_devices));
+ gpiochip_add(&ixp4xx_gpio_chip);
+
if (cpu_is_ixp46x()) {
int region;
diff --git a/arch/arm/mach-ixp4xx/include/mach/gpio.h
b/arch/arm/mach-ixp4xx/include/mach/gpio.h
index a5f87de..86f3596 100644
--- a/arch/arm/mach-ixp4xx/include/mach/gpio.h
+++ b/arch/arm/mach-ixp4xx/include/mach/gpio.h
@@ -27,47 +27,31 @@
#include <linux/kernel.h>
#include <mach/hardware.h>
+#include <asm-generic/gpio.h> /* cansleep wrappers */
-static inline int gpio_request(unsigned gpio, const char *label)
-{
- return 0;
-}
-
-static inline void gpio_free(unsigned gpio)
-{
- might_sleep();
-
- return;
-}
-
-static inline int gpio_direction_input(unsigned gpio)
-{
- gpio_line_config(gpio, IXP4XX_GPIO_IN);
- return 0;
-}
-
-static inline int gpio_direction_output(unsigned gpio, int level)
-{
- gpio_line_set(gpio, level);
- gpio_line_config(gpio, IXP4XX_GPIO_OUT);
- return 0;
-}
+#define NR_BUILTIN_GPIO 16
static inline int gpio_get_value(unsigned gpio)
{
- int value;
-
- gpio_line_get(gpio, &value);
-
- return value;
+ if (gpio < NR_BUILTIN_GPIO)
+ {
+ int value;
+ gpio_line_get(gpio, &value);
+ return value;
+ }
+ else
+ return __gpio_get_value(gpio);
}
static inline void gpio_set_value(unsigned gpio, int value)
{
- gpio_line_set(gpio, value);
+ if (gpio < NR_BUILTIN_GPIO)
+ gpio_line_set(gpio, value);
+ else
+ __gpio_set_value(gpio, value);
}
-#include <asm-generic/gpio.h> /* cansleep wrappers */
+#define gpio_cansleep __gpio_cansleep
extern int gpio_to_irq(int gpio);
extern int irq_to_gpio(unsigned int irq);
--
1.7.1
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