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gpio: gpio-generic: add flag to read out output value from reg_set

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The change introduces BGPIOF_READ_OUTPUT_REG_SET flag for gpio-generic
GPIO chip implementation, which allows to get correct configured value
from reg_set register, input value is still get from reg_dat.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Vladimir Zapolskiy
2015-04-29 18:34:59 +03:00
committed by Linus Walleij
parent ff71880006
commit b19e7f51a5
2 changed files with 20 additions and 3 deletions
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include/linux/basic_mmio_gpio.h
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@@ -74,5 +74,6 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev,
#define BGPIOF_UNREADABLE_REG_SET BIT(1) /* reg_set is unreadable */
#define BGPIOF_UNREADABLE_REG_DIR BIT(2) /* reg_dir is unreadable */
#define BGPIOF_BIG_ENDIAN_BYTE_ORDER BIT(3)
#define BGPIOF_READ_OUTPUT_REG_SET BIT(4) /* reg_set stores output value */
#endif /* __BASIC_MMIO_GPIO_H */