diff options
| author | Vincent Donnefort <vdonnefort@gmail.com> | 2013-06-17 14:03:49 +0200 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2013-06-19 21:14:00 +0200 |
| commit | 7f6569f54695c18e13be2c538834fdd0fad1d3a6 (patch) | |
| tree | 3b17706c4bc6c43a9a1d9cb51b688dfbc217682a /drivers/gpio | |
| parent | gpio-sta2x11: Convert to use devm_ioremap_resource (diff) | |
| download | linux-7f6569f54695c18e13be2c538834fdd0fad1d3a6.tar.xz linux-7f6569f54695c18e13be2c538834fdd0fad1d3a6.zip | |
gpio: ich: add GPO_BLINK support
This patch makes sure blink hardware is disabled for selected GPIO. Blink
hardware is controled by GPO_BLINK register and is available for GPIOs from 0
to 31.
Signed-off-by: Vincent Donnefort <vdonnefort@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-ich.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c index e16d932fd444..2729e3d2d5bb 100644 --- a/drivers/gpio/gpio-ich.c +++ b/drivers/gpio/gpio-ich.c @@ -41,12 +41,14 @@ enum GPIO_REG { GPIO_USE_SEL = 0, GPIO_IO_SEL, GPIO_LVL, + GPO_BLINK }; -static const u8 ichx_regs[3][3] = { +static const u8 ichx_regs[4][3] = { {0x00, 0x30, 0x40}, /* USE_SEL[1-3] offsets */ {0x04, 0x34, 0x44}, /* IO_SEL[1-3] offsets */ {0x0c, 0x38, 0x48}, /* LVL[1-3] offsets */ + {0x18, 0x18, 0x18}, /* BLINK offset */ }; static const u8 ichx_reglen[3] = { @@ -148,6 +150,10 @@ static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, int val) { + /* Disable blink hardware which is available for GPIOs from 0 to 31. */ + if (nr < 32) + ichx_write_bit(GPO_BLINK, nr, 0, 0); + /* Set GPIO output value. */ ichx_write_bit(GPIO_LVL, nr, val, 0); |