Messages in this thread Patch in this message | | | From | Vincent Donnefort <> | Subject | [PATCH] gpio: ich: add GPO_BLINK support | Date | Fri, 14 Jun 2013 16:09:13 +0200 |
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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>
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c index de3c317..181828f 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] = { @@ -154,6 +156,10 @@ static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, if (!ichx_gpio_check_available(gpio, nr)) return -ENXIO; + /* 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); -- 1.7.9.5
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