From 472a61e777fe78cdcb6cb6f25efee0ae9f629aca Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Wed, 14 Aug 2019 14:00:35 +0300 Subject: 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 Tested-by: Ramon Fried Signed-off-by: Ramon Fried Link: https://lore.kernel.org/r/20190814110035.13451-1-ramon.fried@linux.intel.com Acked-by: Stefan Wahren Signed-off-by: Linus Walleij --- include/linux/pinctrl/consumer.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/linux/pinctrl') 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; -- cgit v1.2.3