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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2024-07-03 20:26:09 +0200 |
|---|---|---|
| committer | Bartosz Golaszewski <bartosz.golaszewski@linaro.org> | 2024-07-05 11:00:45 +0200 |
| commit | f8d76c2c313c56d5cb894a243dff4550f048278d (patch) | |
| tree | 5b0663e755c1f077196b69481e51a969cb79ecd2 /drivers/gpio/gpiolib-of.c | |
| parent | gpio: mmio: do not calculate bgpio_bits via "ngpios" (diff) | |
| download | linux-f8d76c2c313c56d5cb894a243dff4550f048278d.tar.xz linux-f8d76c2c313c56d5cb894a243dff4550f048278d.zip | |
gpiolib: of: add polarity quirk for TSC2005
DTS for Nokia N900 incorrectly specifies "active high" polarity for
the reset line, while the chip documentation actually specifies it as
"active low". In the past the driver fudged gpiod API and inverted
the logic internally, but it was changed in d0d89493bff8.
Fixes: d0d89493bff8 ("Input: tsc2004/5 - switch to using generic device properties")
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/ZoWXwYtwgJIxi-hD@google.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 38679cf1969f..89d5e64cf68b 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -213,6 +213,14 @@ static void of_gpio_try_fixup_polarity(const struct device_node *np, */ { "lantiq,pci-xway", "gpio-reset", false }, #endif +#if IS_ENABLED(CONFIG_TOUCHSCREEN_TSC2005) + /* + * DTS for Nokia N900 incorrectly specified "active high" + * polarity for the reset line, while the chip actually + * treats it as "active low". + */ + { "ti,tsc2005", "reset-gpios", false }, +#endif }; unsigned int i; |