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regulator: core: do not silently ignore provided init_data

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On DT platforms, if a regulator init_data is provided in config, it is
silently ignored in favor of the DT parsing done by the framework, if
of_match is set.

of_match is an indication that init_data is expected to be set based on DT
and the parsing should be done by the regulator framework.

If the regulator provider passed init_data it must be because it is useful
somehow, in such case of_match should be clear.

If the driver expects the framework to initialize this data on its
own, it should leave init_data clear.

Warn if both init_data and of_match are set, then default to the provided
init_data.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://patch.msgid.link/20241008-regulator-ignored-data-v2-1-d1251e0ee507@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jerome Brunet 2024-10-08 18:07:01 +02:00 • committed by Mark Brown
parent 42f7652d3e
commit cd7a38c40b
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GPG key ID: 24D68B725D5487D0
1 changed files with 34 additions and 23 deletions
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57
drivers/regulator/core.c
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@ -5681,32 +5681,43 @@ regulator_register(struct device *dev,
goto clean;
}
init_data = regulator_of_get_init_data(dev, regulator_desc, config,
&rdev->dev.of_node);
if (config->init_data) {
/*
* Providing of_match means the framework is expected to parse
* DT to get the init_data. This would conflict with provided
* init_data, if set. Warn if it happens.
*/
if (regulator_desc->of_match)
dev_warn(dev, "Using provided init data - OF match ignored\n");
/*
* Sometimes not all resources are probed already so we need to take
* that into account. This happens most the time if the ena_gpiod comes
* from a gpio extender or something else.
*/
if (PTR_ERR(init_data) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto clean;
}
/*
* We need to keep track of any GPIO descriptor coming from the
* device tree until we have handled it over to the core. If the
* config that was passed in to this function DOES NOT contain
* a descriptor, and the config after this call DOES contain
* a descriptor, we definitely got one from parsing the device
* tree.
*/
if (!cfg->ena_gpiod && config->ena_gpiod)
dangling_of_gpiod = true;
if (!init_data) {
init_data = config->init_data;
rdev->dev.of_node = of_node_get(config->of_node);
} else {
init_data = regulator_of_get_init_data(dev, regulator_desc,
config,
&rdev->dev.of_node);
/*
* Sometimes not all resources are probed already so we need to
* take that into account. This happens most the time if the
* ena_gpiod comes from a gpio extender or something else.
*/
if (PTR_ERR(init_data) == -EPROBE_DEFER) {
ret = -EPROBE_DEFER;
goto clean;
}
/*
* We need to keep track of any GPIO descriptor coming from the
* device tree until we have handled it over to the core. If the
* config that was passed in to this function DOES NOT contain a
* descriptor, and the config after this call DOES contain a
* descriptor, we definitely got one from parsing the device
* tree.
*/
if (!cfg->ena_gpiod && config->ena_gpiod)
dangling_of_gpiod = true;
}
ww_mutex_init(&rdev->mutex, &regulator_ww_class);