diff options
| author | Alexander Graf <agraf@suse.de> | 2016-08-11 13:38:31 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-09-06 13:18:18 -0400 |
| commit | 04a993fe116604b8c81fb116857dbc78e2500133 (patch) | |
| tree | bce93b862151497867391cca54ff1ff062ff2a26 /drivers | |
| parent | c0afcb588979e554fd28adeefa6810abb04cf108 (diff) | |
bcm2835_gpio: Implement GPIOF_FUNC
So far we could only tell the gpio framework that a GPIO was mapped as input or
output, not as alternative function.
This patch adds support for determining whether a function is mapped as
alternative.
Signed-off-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/bcm2835_gpio.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/drivers/gpio/bcm2835_gpio.c b/drivers/gpio/bcm2835_gpio.c index fbc641d662..8b88d7956e 100644 --- a/drivers/gpio/bcm2835_gpio.c +++ b/drivers/gpio/bcm2835_gpio.c @@ -44,15 +44,6 @@ static int bcm2835_gpio_direction_output(struct udevice *dev, unsigned gpio, return 0; } -static bool bcm2835_gpio_is_output(const struct bcm2835_gpios *gpios, int gpio) -{ - u32 val; - - val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]); - val &= BCM2835_GPIO_FSEL_MASK << BCM2835_GPIO_FSEL_SHIFT(gpio); - return val ? true : false; -} - static int bcm2835_get_value(const struct bcm2835_gpios *gpios, unsigned gpio) { unsigned val; @@ -81,15 +72,28 @@ static int bcm2835_gpio_set_value(struct udevice *dev, unsigned gpio, return 0; } -static int bcm2835_gpio_get_function(struct udevice *dev, unsigned offset) +int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned gpio) { struct bcm2835_gpios *gpios = dev_get_priv(dev); + u32 val; + + val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]); + + return (val >> BCM2835_GPIO_FSEL_SHIFT(gpio) & BCM2835_GPIO_FSEL_MASK); +} + +static int bcm2835_gpio_get_function(struct udevice *dev, unsigned offset) +{ + int funcid = bcm2835_gpio_get_func_id(dev, offset); - /* GPIOF_FUNC is not implemented yet */ - if (bcm2835_gpio_is_output(gpios, offset)) + switch (funcid) { + case BCM2835_GPIO_OUTPUT: return GPIOF_OUTPUT; - else + case BCM2835_GPIO_INPUT: return GPIOF_INPUT; + default: + return GPIOF_FUNC; + } } |