diff options
| author | Stefan Wahren <stefan.wahren@i2se.com> | 2019-08-14 14:00:35 +0300 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-08-23 12:09:41 +0300 |
| commit | 472a61e777fe78cdcb6cb6f25efee0ae9f629aca (patch) | |
| tree | f3ee044b2383fa012881daf257e6b4ca90ceefd4 /include/linux/pinctrl | |
| parent | 2dc889a8846d16574794669bbdca7401900695b7 (diff) | |
| download | linux-472a61e777fe78cdcb6cb6f25efee0ae9f629aca.tar.xz | |
pinctrl/gpio: Take MUX usage into account
The user space like gpioinfo only see the GPIO usage but not the
MUX usage (e.g. I2C or SPI usage) of a pin. As a user we want
to know which pin is free/safe to use. So take the MUX usage of
strict pinmux controllers into account to get a more realistic
view for ioctl GPIO_GET_LINEINFO_IOCTL.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Tested-by: Ramon Fried <rfried.dev@gmail.com>
Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
Link: https://lore.kernel.org/r/20190814110035.13451-1-ramon.fried@linux.intel.com
Acked-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'include/linux/pinctrl')
| -rw-r--r-- | include/linux/pinctrl/consumer.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/pinctrl/consumer.h b/include/linux/pinctrl/consumer.h index 86720a5a384f..7f8c7d9583d3 100644 --- a/include/linux/pinctrl/consumer.h +++ b/include/linux/pinctrl/consumer.h @@ -24,6 +24,7 @@ struct device; #ifdef CONFIG_PINCTRL /* External interface to pin control */ +extern bool pinctrl_gpio_can_use_line(unsigned gpio); extern int pinctrl_gpio_request(unsigned gpio); extern void pinctrl_gpio_free(unsigned gpio); extern int pinctrl_gpio_direction_input(unsigned gpio); @@ -61,6 +62,11 @@ static inline int pinctrl_pm_select_idle_state(struct device *dev) #else /* !CONFIG_PINCTRL */ +static inline bool pinctrl_gpio_can_use_line(unsigned gpio) +{ + return true; +} + static inline int pinctrl_gpio_request(unsigned gpio) { return 0; |