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authorJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2012-07-06 06:48:33 +0800
committerJean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>2012-10-13 09:09:28 +0800
commitc18486e10d5801b832b34708f6d2bd266c704793 (patch)
tree1cfe9c42eacccc4d1b5c1678a7288952f96c5096
parent8d39e0fd080fbc2287bca3f596741a38281634da (diff)
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ARM: at91: gpio: implement request
Configure the pin as pio when requested. It is needed to configure the pin as PIO at "request time" when we are using DT. Indeed, the muxing via old AT91 API is not allowed anymore if we are using the plain gpiolib. Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
-rw-r--r--arch/arm/mach-at91/gpio.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index be42cf0e74bd..3b8f463bfa1d 100644
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -46,6 +46,7 @@ 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);
@@ -59,6 +60,7 @@ 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, \
@@ -862,6 +864,16 @@ 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)
{