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alistair23-linux
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regulator: core: Request GPIO before creating sysfs entries 

regulator_attr_is_visible (which is a .is_visible callback of
regulator_dev_group attribute_grpup) checks rdev->ena_pin to decide if
"status" file should be present in sysfs. This field is set at the end
of regulator_ena_gpio_request so it has to be called before
device_register() otherwise this test will always fail, causing "status"
file to not be visible.

Since regulator_attr_is_visible also tests for is_enabled() op, this
problem is only visible for regulators that does not define this
callback, like regulator-fixed.c.

Signed-off-by: Krzysztof Adamski <krzysztof.adamski@tieto.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Krzysztof Adamski 2016-02-22 09:24:00 +01:00 committed by Mark Brown
parent 92e963f50f
commit daad134d66
1 changed files with 10 additions and 10 deletions
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20
drivers/regulator/core.c
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@ -3918,6 +3918,16 @@ regulator_register(const struct regulator_desc *regulator_desc,
goto clean;
}
if ((config->ena_gpio || config->ena_gpio_initialized) &&
gpio_is_valid(config->ena_gpio)) {
ret = regulator_ena_gpio_request(rdev, config);
if (ret != 0) {
rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
config->ena_gpio, ret);
goto wash;
}
}
/* register with sysfs */
rdev->dev.class = &regulator_class;
rdev->dev.parent = dev;
@ -3931,16 +3941,6 @@ regulator_register(const struct regulator_desc *regulator_desc,
dev_set_drvdata(&rdev->dev, rdev);
if ((config->ena_gpio || config->ena_gpio_initialized) &&
gpio_is_valid(config->ena_gpio)) {
ret = regulator_ena_gpio_request(rdev, config);
if (ret != 0) {
rdev_err(rdev, "Failed to request enable GPIO%d: %d\n",
config->ena_gpio, ret);
goto wash;
}
}
/* set regulator constraints */
if (init_data)
constraints = &init_data->constraints;