[PATCH] gpio: add GPIOD_ACTIVE_LOW into GPIOD_MASK_DIR

[haibo.chen at nxp.com]

From: Haibo Chen <haibo.chen at nxp.com>

dm_gpio_set_dir_flags() will clear GPIOD_MASK_DIR and set new flags.
But there are cases like i2c_deblock_gpio_loop() will do like this:

-first conifg GPIO(SDA) output with GPIOD_ACTIVE_LOW
dm_gpio_set_dir_flags(pin, GPIOD_IS_OUT |
			   GPIOD_ACTIVE_LOW |
			   GPIOD_IS_OUT_ACTIVE);

-then config GPIO input
dm_gpio_set_dir_flags(pin, GPIOD_IS_IN);

-then get the GPIO input value:
dm_gpio_get_value(pin);

When config the GPIO input, only set GPIOD_IS_IN, but unfortunately
since the previous GPIOD_ACTIVE_LOW is not cleared, still keep in
flags, make the value from dm_gpio_get_value() not logic correct.

So add GPIOD_ACTIVE_LOW into GPIOD_MASK_DIR to avoid this issue.

Signed-off-by: Haibo Chen <haibo.chen at nxp.com>
---
 include/asm-generic/gpio.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index dd0bdf2315..903b237aac 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -131,7 +131,7 @@ struct gpio_desc {
 
 /* Flags for updating the above */
 #define GPIOD_MASK_DIR		(GPIOD_IS_OUT | GPIOD_IS_IN | \
-					GPIOD_IS_OUT_ACTIVE)
+				 GPIOD_IS_OUT_ACTIVE | GPIOD_ACTIVE_LOW)
 #define GPIOD_MASK_DSTYPE	(GPIOD_OPEN_DRAIN | GPIOD_OPEN_SOURCE)
 #define GPIOD_MASK_PULL		(GPIOD_PULL_UP | GPIOD_PULL_DOWN)
 
-- 
2.34.1