gpio: TODO: add an item to track the conversion to the new value setters

Add an item tracking the treewide conversion of GPIO drivers to using
the new line value setter callbacks in struct gpio_chip instead of the
old ones that don't allow drivers to signal failures to callers.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250321-gpio-todo-updates-v1-5-7b38f07110ee@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

diff --git a/drivers/gpio/TODO b/drivers/gpio/TODO
index 052ba70070033472eacfb463eb2edfbc21673c89..3abf4805335f185e156f382bbcc6b65671ad50fb 100644 (file)
--- a/drivers/gpio/TODO
+++ b/drivers/gpio/TODO
@@ -161,3 +161,15 @@ A small number of drivers have been converted (pl061, tegra186, msm,
 amd, apple), and can be used as examples of how to proceed with this
 conversion. Note that drivers using the generic irqchip framework
 cannot be converted yet, but watch this space!
+
+-------------------------------------------------------------------------------
+
+Convert all GPIO chips to using the new, value returning line setters
+
+struct gpio_chip's set() and set_multiple() callbacks are now deprecated. They
+return void and thus do not allow drivers to indicate failure to set the line
+value back to the caller.
+
+We've now added new variants - set_rv() and set_multiple_rv() that return an
+integer. Let's convert all GPIO drivers treewide to use the new callbacks,
+remove the old ones and finally rename the new ones back to the old names.