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gpio: tps65910: Add sleep control support

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The device tps65910/tps65911 supports the sleep
functionality in some of gpios. If gpio is configured
in output mode and sleep is enabled then during device
sleep state, the output of gpio becomes LOW regardless
of non-sleep output value.
Such gpio can be used to control regulator switch such
that output of regulator is off in device sleep state.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Laxman Dewangan
2012-02-01 12:09:04 +05:30
committed by Grant Likely
parent b43ab901d6
commit 9467d298e9
2 changed files with 26 additions and 2 deletions
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20
drivers/gpio/gpio-tps65910.c
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@@ -69,6 +69,7 @@ static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
{
int ret;
struct tps65910_board *board_data;
if (!gpio_base)
return;
@@ -80,10 +81,10 @@ void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
switch(tps65910_chip_id(tps65910)) {
case TPS65910:
tps65910->gpio.ngpio = 6;
tps65910->gpio.ngpio = TPS65910_NUM_GPIO;
break;
case TPS65911:
tps65910->gpio.ngpio = 9;
tps65910->gpio.ngpio = TPS65911_NUM_GPIO;
break;
default:
return;
@@ -95,6 +96,21 @@ void tps65910_gpio_init(struct tps65910 *tps65910, int gpio_base)
tps65910->gpio.set = tps65910_gpio_set;
tps65910->gpio.get = tps65910_gpio_get;
/* Configure sleep control for gpios */
board_data = dev_get_platdata(tps65910->dev);
if (board_data) {
int i;
for (i = 0; i < tps65910->gpio.ngpio; ++i) {
if (board_data->en_gpio_sleep[i]) {
ret = tps65910_set_bits(tps65910,
TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
if (ret < 0)
dev_warn(tps65910->dev,
"GPIO Sleep setting failed\n");
}
}
}
ret = gpiochip_add(&tps65910->gpio);
if (ret)