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| author | Wolfram Sang <wsa@the-dreams.de> | 2017-11-01 23:44:52 +0100 |
|---|---|---|
| committer | Wolfram Sang <wsa@the-dreams.de> | 2017-11-01 23:45:46 +0100 |
| commit | 4ee045f4e9b73c4635ceedbb1ee40e0b3ecbdbcc (patch) | |
| tree | f75e20907a3dc01e780ca75b1696f7d30c179944 /drivers/gpio | |
| parent | i2c: omap: Trigger bus recovery in lockup case (diff) | |
| parent | i2c: gpio: Add support for named gpios in DT (diff) | |
| download | linux-4ee045f4e9b73c4635ceedbb1ee40e0b3ecbdbcc.tar.xz linux-4ee045f4e9b73c4635ceedbb1ee40e0b3ecbdbcc.zip | |
Merge branch 'for-wolfram' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio into i2c/for-4.15
Refactor i2c-gpio and its users to use gpiod. Done by GPIO maintainer
LinusW.
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpiolib.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index eb80dac4e26a..c952ef1b2f46 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -3264,8 +3264,21 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id, if (lflags & GPIO_ACTIVE_LOW) set_bit(FLAG_ACTIVE_LOW, &desc->flags); + if (lflags & GPIO_OPEN_DRAIN) set_bit(FLAG_OPEN_DRAIN, &desc->flags); + else if (dflags & GPIOD_FLAGS_BIT_OPEN_DRAIN) { + /* + * This enforces open drain mode from the consumer side. + * This is necessary for some busses like I2C, but the lookup + * should *REALLY* have specified them as open drain in the + * first place, so print a little warning here. + */ + set_bit(FLAG_OPEN_DRAIN, &desc->flags); + gpiod_warn(desc, + "enforced open drain please flag it properly in DT/ACPI DSDT/board file\n"); + } + if (lflags & GPIO_OPEN_SOURCE) set_bit(FLAG_OPEN_SOURCE, &desc->flags); if (lflags & GPIO_SLEEP_MAY_LOOSE_VALUE) |