lwn.git/drivers/gpio/gpio-raspberrypi-exp.c, branch header-removal

gpio: raspberrypi-exp: Release firmware handle on unbind

2021-03-22T16:59:51+00:00

Use devm_rpi_firmware_get() so as to make sure we release RPi's firmware interface when unbinding the device. Signed-off-by: Nicolas Saenz Julienne Reviewed-by: Florian Fainelli Acked-by: Bartosz Golaszewski

gpio: Use new GPIO_LINE_DIRECTION

2019-11-07T08:27:48+00:00

It's hard for occasional GPIO code reader/writer to know if values 0/1 equal to IN or OUT. Use defined GPIO_LINE_DIRECTION_IN and GPIO_LINE_DIRECTION_OUT to help them out. NOTE - for gpio-amd-fch and gpio-bd9571mwv: This commit also changes the return value for direction get to equal 1 for direction INPUT. Prior this commit these drivers might have returned some other positive value but 1 for INPUT. Signed-off-by: Matti Vaittinen Acked-by: Scott Branden Reviewed-by: Grygorii Strashko Reviewed-by: Michal Simek Reviewed-by: Geert Uytterhoeven Acked-by: Andy Shevchenko Acked-by: William Breathitt Gray Acked-by: Kuppuswamy Sathyanarayanan Signed-off-by: Linus Walleij

gpio: raspberrypi-exp: decrease refcount on firmware dt node

2018-12-17T14:28:30+00:00

We're getting a reference RPi's firmware node in order to be able to communicate with it's driver. We should decrease the reference count on the dt node after being done with it. Fixes: a98d90e7d588 ("gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service") Signed-off-by: Nicolas Saenz Julienne Signed-off-by: Linus Walleij

gpio: raspberrypi-exp: Driver for RPi3 GPIO expander via mailbox service

2018-02-22T12:49:59+00:00

Pi3 and Compute Module 3 have a GPIO expander that the VPU communicates with. There is a mailbox service that now allows control of this expander, so add a kernel driver that can make use of it. Reviewed-by: Stefan Wahren Signed-off-by: Dave Stevenson Signed-off-by: Baruch Siach Signed-off-by: Linus Walleij