starfive-tech/u-boot.git/include/asm-generic/gpio.h, branch visionfive_devel

gpio: Drop dm_gpio_set_dir()

2021-04-12T21:45:40+00:00

This function is not used. Drop it. Signed-off-by: Simon Glass Reviewed-by: Patrick Delaunay

gpio: Add a way to read 3-way strapping pins

2021-03-03T20:40:47+00:00

Using the internal vs. external pull resistors it is possible to get 27 different combinations from 3 strapping pins. Add an implementation of this. This involves updating the sandbox GPIO driver to model external and (weaker) internal pull resistors. The get_value() method now takes account of what is driving a pin: sandbox: GPIOD_EXT_DRIVEN - in which case GPIO_EXT_HIGH provides the value outside source - in which case GPIO_EXT_PULL_UP/DOWN indicates the external state and we work the final state using those flags and the internal GPIOD_PULL_UP/DOWN flags Of course the outside source does not really exist in sandbox. We are just modelling it for test purpose. Signed-off-by: Simon Glass

gpio: Replace direction_input() and direction_output()

2021-03-03T20:40:11+00:00

The new update_flags() method is more flexible since it allows the driver to see the full flags all at once. Use that in preference to these two functions. Add comments to that effect. Signed-off-by: Simon Glass Reviewed-by: Patrick Delaunay

dm: gpio: Add a way to update flags

2021-03-03T20:40:10+00:00

It is convenient to be able to adjust some of the flags for a GPIO while leaving others alone. Add a function for this. Update dm_gpio_set_dir_flags() to make use of this. Also update dm_gpio_set_value() to use this also, since this allows the open-drain / open-source features to be implemented directly in the driver, rather than using the uclass workaround. Update the sandbox tests accordingly. This involves a lot of changes to dm_test_gpio_opendrain_opensource() since we no-longer have the direciion being reported differently depending on the open drain/open source flags. Also update the STM32 drivers to let the uclass handle the active low/high logic. Drop the GPIOD_FLAGS_OUTPUT() macro which is no-longer used. Signed-off-by: Simon Glass Tested-by: Kory Maincent Reviewed-by: Patrick Delaunay Tested-by: Patrick Delaunay Reviewed-by: Patrick Delaunay Tested-by: Patrick Delaunay

gpio: Rename dm_gpio_get_dir_flags() to dm_gpio_get_flags()

2021-03-03T19:51:06+00:00

This function can be used to get any flags, not just direction flags. Rename it to avoid confusion. Signed-off-by: Simon Glass Reviewed-by: Patrick Delaunay Reviewed-by: Pratyush Yadav

dm: gpio: Rename get_dir_flags() method to get_flags()

2021-03-03T19:51:06+00:00

It is more useful to be able to read all the flags, not just the direction ones. In fact this is what the STM32 driver does. Update the method name to reflect this. Tweak the docs a little and use 'flagsp' as the return argument, as is common in driver model, to indicate it returns a value. Signed-off-by: Simon Glass Reviewed-by: Patrick Delaunay Reviewed-by: Pratyush Yadav

dm: gpio: Rename set_dir_flags() method to update_flags()

2021-03-03T19:51:06+00:00

The current method is a misnomer since it is also used (e.g. by stm32) to update pull settings and open source/open drain. Rename it and expand the documentation to cover a few more details. Signed-off-by: Simon Glass Reviewed-by: Pratyush Yadav Reviewed-by: Patrick Delaunay

gpio: fix gpio_request_by_name() description

2020-10-22T15:26:14+00:00

Replace 'dev->dev' with '@desc->dev' in the gpio_request_by_name function desc parameter description. Signed-off-by: Dario Binacchi Reviewed-by: Simon Glass

drivers: gpio: Add a managed API to get a GPIO from the device-tree

2020-09-30T15:55:22+00:00

Add managed functions to get a gpio from the devce-tree, based on a property name (minus the '-gpios' suffix) and optionally an index. When the device is unbound, the GPIO is automatically released and the data structure is freed. Signed-off-by: Jean-Jacques Hiblot Reviewed-by: Simon Glass Signed-off-by: Pratyush Yadav

gpio: Add a method to convert a GPIO to ACPI

2020-07-17T06:32:24+00:00

When generating ACPI tables we need to convert GPIOs in U-Boot to the ACPI structures required by ACPI. This is a SoC-specific conversion and cannot be handled by generic code, so add a new GPIO method to do the conversion. Signed-off-by: Simon Glass Reviewed-by: Wolfgang Wallner Reviewed-by: Bin Meng