[PATCH 1/2] ARM: at91: gpio: implement request
Jean-Christophe PLAGNIOL-VILLARD
plagnioj at jcrosoft.com
Fri Jul 6 07:26:10 EDT 2012
confire the pin as pio when requested
Cc: Nicolas Ferre <nicolas.ferre at atmel.com>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>
---
arch/arm/mach-at91/gpio.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index 325837a..994ed02 100644
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -44,6 +44,7 @@ struct at91_gpio_chip {
#define to_at91_gpio_chip(c) container_of(c, struct at91_gpio_chip, chip)
+static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset);
static void at91_gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip);
static void at91_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val);
static int at91_gpiolib_get(struct gpio_chip *chip, unsigned offset);
@@ -57,6 +58,7 @@ static int at91_gpiolib_to_irq(struct gpio_chip *chip, unsigned offset);
{ \
.chip = { \
.label = name, \
+ .request = at91_gpiolib_request, \
.direction_input = at91_gpiolib_direction_input, \
.direction_output = at91_gpiolib_direction_output, \
.get = at91_gpiolib_get, \
@@ -861,6 +863,18 @@ void __init at91_gpio_irq_setup(void)
}
/* gpiolib support */
+
+
+static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset)
+{
+ struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+ void __iomem *pio = at91_gpio->regbase;
+ unsigned mask = 1 << offset;
+
+ __raw_writel(mask, pio + PIO_PER);
+ return 0;
+}
+
static int at91_gpiolib_direction_input(struct gpio_chip *chip,
unsigned offset)
{
--
1.7.10
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