#
adcad536 |
|
29-Feb-2024 |
Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
gpio: of: Make of_gpio_get_count() take firmware node as a parameter Make of_gpio_get_count() take firmware node as a parameter in order to be aligned with other functions and decouple from unused device pointer. The latter helps to create a common fwnode_gpio_count() in the future. While at it, rename to be of_gpio_count() to be aligned with the others. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
|
#
380c7ba3 |
|
08-Feb-2023 |
Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
gpiolib: Clean up headers There is a few things done: - include only the headers we are direct user of - when pointer is in use, provide a forward declaration - add missing headers - group generic headers and subsystem headers - sort each group alphabetically Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
#
70d0fc42 |
|
28-Dec-2022 |
Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
gpiolib: Get rid of not used of_node member All new drivers should use fwnode and / or parent to provide the necessary information to the GPIO library. Cc: Thierry Reding <treding@nvidia.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
|
#
07445ae1 |
|
15-Nov-2022 |
Dmitry Torokhov <dmitry.torokhov@gmail.com> |
gpiolib: of: change of_find_gpio() to accept device node In preparation of switching all OF-based GPIO lookups to go through of_find_gpio() let's change it to accept device node as its argument as we do not always have access to device structure. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
|
#
27043a7d |
|
08-Nov-2022 |
Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
gpiolib: of: Integrate of_gpiochip_init_valid_mask() into gpiochip_init_valid_mask() In preparation to complete fwnode switch, integrate of_gpiochip_init_valid_mask() into gpiochip_init_valid_mask(). Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
|
#
08a149c4 |
|
06-Oct-2022 |
Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
gpiolib: Clean up headers There is a few things done: - include only the headers we are direct user of - when pointer is in use, provide a forward declaration - add missing headers - group generic headers and subsystem headers - sort each group alphabetically While at it, fix some awkward indentations. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
|
#
4731210c |
|
22-Jan-2021 |
Saravana Kannan <saravanak@google.com> |
gpiolib: Bind gpio_device to a driver to enable fw_devlink=on by default There are multiple instances of GPIO device tree nodes of the form: foo { compatible = "acme,foo"; ... gpio0: gpio0@xxxxxxxx { compatible = "acme,bar"; ... gpio-controller; }; gpio1: gpio1@xxxxxxxx { compatible = "acme,bar"; ... gpio-controller; }; ... } bazz { my-gpios = <&gpio0 ...>; } Case 1: The driver for "foo" populates struct device for these gpio* nodes and then probes them using a driver that binds with "acme,bar". This driver for "acme,bar" then registers the gpio* nodes with gpiolib. This lines up with how DT nodes with the "compatible" property are typically converted to struct devices and then registered with driver core to probe them. This also allows the gpio* devices to hook into all the driver core capabilities like runtime PM, probe deferral, suspend/resume ordering, device links, etc. Case 2: The driver for "foo" doesn't populate struct devices for these gpio* nodes before registering them with gpiolib. Instead it just loops through its child nodes and directly registers the gpio* nodes with gpiolib. Drivers that follow case 2 cause problems with fw_devlink=on. This is because fw_devlink will prevent bazz from probing until there's a struct device that has gpio0 as its fwnode (because bazz lists gpio0 as a GPIO supplier). Once the struct device is available, fw_devlink will create a device link with gpio0 device as the supplier and bazz device as the consumer. After this point, since the gpio0 device will never bind to a driver, the device link will prevent bazz device from ever probing. Finding and refactoring all the instances of drivers that follow case 2 will cause a lot of code churn and it is not something that can be done in one shot. In some instances it might not even be possible to refactor them cleanly. Examples of such instances are [1] [2]. This patch works around this problem and avoids all the code churn by simply setting the fwnode of the gpio_device and creating a stub driver to bind to the gpio_device. This allows all the consumers to continue probing when the driver follows case 2. [1] - https://lore.kernel.org/lkml/20201014191235.7f71fcb4@xhacker.debian/ [2] - https://lore.kernel.org/lkml/e28e1f38d87c12a3c714a6573beba6e1@kernel.org/ Fixes: e590474768f1 ("driver core: Set fw_devlink=on by default") Cc: Marc Zyngier <maz@kernel.org> Cc: Jisheng Zhang <Jisheng.Zhang@synaptics.com> Cc: Kever Yang <kever.yang@rock-chips.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: Saravana Kannan <saravanak@google.com> Link: https://lore.kernel.org/r/20210122193600.1415639-1-saravanak@google.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
#
63636d95 |
|
20-Feb-2020 |
Geert Uytterhoeven <geert+renesas@glider.be> |
gpio: of: Add DT overlay support for GPIO hogs As GPIO hogs are configured at GPIO controller initialization time, adding/removing GPIO hogs in DT overlays does not work. Add support for GPIO hogs described in DT overlays by registering an OF reconfiguration notifier, to handle the addition and removal of GPIO hog subnodes to/from a GPIO controller device node. Note that when a GPIO hog device node is being removed, its "gpios" properties is no longer available, so we have to keep track of which node a hog belongs to, which is done by adding a pointer to the hog's device node to struct gpio_desc. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20200220130149.26283-3-geert+renesas@glider.be Reviewed-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
|
#
c83d3c77 |
|
06-Sep-2019 |
Geert Uytterhoeven <geert+renesas@glider.be> |
gpio: of: Make of_get_named_gpiod_flags() private Since commit f626d6dfb7098525 ("gpio: of: Break out OF-only code"), there are no more users of of_get_named_gpiod_flags() outside gpiolib-of.c. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20190906084539.21838-2-geert+renesas@glider.be Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
|
#
49281a22 |
|
31-Jul-2019 |
Stephen Boyd <swboyd@chromium.org> |
gpio: of: Fix hard-assigned valid_mask for OF case The recent refactoring to break out OF code to its own file contained a bug letting the need_valid_mask be overridden by the need of the device tree range check, and if there were no ranges, but device tree was active and the reserved GPIO used in another way, things likely crash. Cc: Mark Brown <broonie@kernel.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Stephen Boyd <swboyd@chromium.org> Fixes: f626d6dfb709 ("gpio: of: Break out OF-only code") Reported-by: Mark Brown <broonie@kernel.org> Suggested-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
|
#
f626d6df |
|
17-Jul-2019 |
Linus Walleij <linus.walleij@linaro.org> |
gpio: of: Break out OF-only code The core gpiolib should not contain any OF/device tree-only code. Try to break out the main part of it and push it down into the optional gpiolib-of.c part of the library. Create a local gpiolib-of.h header and move stuff around a bit to get a clean cut. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20190717071001.3858-1-linus.walleij@linaro.org
|