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fdt: Add polarity-aware gpio functions to fdtdec

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Add get and set gpio functions to fdtdec that take into account the
polarity field in fdtdec_gpio_state.flags.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Sean Paul 2012-10-25 16:31:06 +00:00 • committed by Gerald Van Baren
parent aadef0a1bc
commit 202ff75375
2 changed files with 36 additions and 0 deletions
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20
lib/fdtdec.c
View file

@ -487,6 +487,26 @@ int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
return err == 1 ? 0 : err;
}
int fdtdec_get_gpio(struct fdt_gpio_state *gpio)
{
int val;
if (!fdt_gpio_isvalid(gpio))
return -1;
val = gpio_get_value(gpio->gpio);
return gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
}
int fdtdec_set_gpio(struct fdt_gpio_state *gpio, int val)
{
if (!fdt_gpio_isvalid(gpio))
return -1;
val = gpio->flags & FDT_GPIO_ACTIVE_LOW ? val ^ 1 : val;
return gpio_set_value(gpio->gpio, val);
}
int fdtdec_setup_gpio(struct fdt_gpio_state *gpio)
{
/*