Commit 1dea33e8 authored by Dmitry Torokhov's avatar Dmitry Torokhov Committed by Linus Walleij
Browse files

gpiolib: of: fix fallback quirks handling

We should only try to execute fallback quirks handling when previous
call returned -ENOENT, and not when we did not get -EPROBE_DEFER.
The other errors should be treated as hard errors: we did find the GPIO
description, but for some reason we failed to handle it properly.

The fallbacks should only be executed when previous handlers returned
-ENOENT, which means the mapping/description was not found.

Also let's remove the explicit deferral handling when iterating through
GPIO suffixes: it is not needed anymore as we will not be calling
fallbacks for anything but -ENOENT.

Fixes: df451f83

 ("gpio: of: fix Freescale SPI CS quirk handling")
Signed-off-by: default avatarDmitry Torokhov <>

Reviewed-by: default avatarAndy Shevchenko <>
Signed-off-by: default avatarLinus Walleij <>
parent aefde297
......@@ -343,36 +343,27 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id,
desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx,
* -EPROBE_DEFER in our case means that we found a
* valid GPIO property, but no controller has been
* registered so far.
* This means we don't need to look any further for
* alternate name conventions, and we should really
* preserve the return code for our user to be able to
* retry probing later.
if (IS_ERR(desc) && PTR_ERR(desc) == -EPROBE_DEFER)
return desc;
if (!IS_ERR(desc) || (PTR_ERR(desc) != -ENOENT))
if (!IS_ERR(desc) || PTR_ERR(desc) != -ENOENT)
/* Special handling for SPI GPIOs if used */
if (IS_ERR(desc))
if (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT) {
/* Special handling for SPI GPIOs if used */
desc = of_find_spi_gpio(dev, con_id, &of_flags);
if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER) {
if (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT) {
/* This quirk looks up flags and all */
desc = of_find_spi_cs_gpio(dev, con_id, idx, flags);
if (!IS_ERR(desc))
return desc;
/* Special handling for regulator GPIOs if used */
if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER)
if (IS_ERR(desc) && PTR_ERR(desc) == -ENOENT) {
/* Special handling for regulator GPIOs if used */
desc = of_find_regulator_gpio(dev, con_id, &of_flags);
if (IS_ERR(desc))
return desc;
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