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| author | Thierry Reding <treding@nvidia.com> | 2019-02-20 11:52:14 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2019-02-21 13:08:42 +0100 |
| commit | 692ef26e72fcce0c1e73c41683fd3512f3719d55 (patch) | |
| tree | e0be735401e5a429d31eb27ecf60c79bc7a8582a /drivers/gpio/gpiolib-of.c | |
| parent | fa7569c8ff8ea68f69290e4c5b86a5828d565374 (diff) | |
| download | lwn-692ef26e72fcce0c1e73c41683fd3512f3719d55.tar.gz lwn-692ef26e72fcce0c1e73c41683fd3512f3719d55.zip | |
gpio: of: Restrict enable-gpio quirk to regulator-gpio
Commit 0e7d6f940164 ("gpio: of: Apply regulator-gpio quirk only to
enable-gpios") breaks the device tree ABI specified in the device tree
bindings for fixed regulators (compatible "regulator-fixed"). According
to these bindings the polarity of the GPIO is exclusively controlled by
the presence or absence of the enable-active-high property. As such the
polarity quirk implemented in of_gpio_flags_quirks() must be applied to
the GPIO specified for fixed regulators.
However, commit 0e7d6f940164 ("gpio: of: Apply regulator-gpio quirk only
to enable-gpios") restricted the quirk to the enable-gpios property for
fixed regulators as well, whereas according to the commit message itself
it should only apply to "regulator-gpio" compatible device tree nodes.
Fix this by actually implementing what the offending commit intended,
which is to ensure that the quirk is applied to the GPIO specified by
the "enable-gpio" property for the "regulator-gpio" bindings only.
This fixes a regression on Jetson TX1 where the fixed regulator for the
HDMI +5V pin relies on the flags quirk for the proper polarity.
Fixes: 0e7d6f940164 ("gpio: of: Apply regulator-gpio quirk only to enable-gpios")
Signed-off-by: Thierry Reding <treding@nvidia.com>
Tested-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpiolib-of.c')
| -rw-r--r-- | drivers/gpio/gpiolib-of.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 4547dba19956..950d3d6b2b7f 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -84,10 +84,10 @@ static void of_gpio_flags_quirks(struct device_node *np, * Note that active low is the default. */ if (IS_ENABLED(CONFIG_REGULATOR) && - !strcmp(propname, "enable-gpio") && (of_device_is_compatible(np, "regulator-fixed") || of_device_is_compatible(np, "reg-fixed-voltage") || - of_device_is_compatible(np, "regulator-gpio"))) { + (of_device_is_compatible(np, "regulator-gpio") && + strcmp(propname, "enable-gpio") == 0))) { /* * The regulator GPIO handles are specified such that the * presence or absence of "enable-active-high" solely controls |