From 80c056656d46ffbece6125dee3f25adbc36d1486 Mon Sep 17 00:00:00 2001 From: Vincent Whitchurch Date: Tue, 1 Mar 2022 12:18:31 +0100 Subject: regulator: virtual: add devicetree support The reg-virt-consumer is very useful for development and testing of regulator drivers since it allows voltages and modes to be set from userspace. However, it currently requires platform data so it cannot be used without patching the kernel. Add support for probing it from the devicetree to remedy this. Since this driver is only meant for testing and is a purely software construct, no binding documentation is added. Signed-off-by: Vincent Whitchurch Link: https://lore.kernel.org/r/20220301111831.3742383-4-vincent.whitchurch@axis.com Signed-off-by: Mark Brown --- drivers/regulator/virtual.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/regulator/virtual.c') diff --git a/drivers/regulator/virtual.c b/drivers/regulator/virtual.c index 9e0abbee1df5..5d32628a5011 100644 --- a/drivers/regulator/virtual.c +++ b/drivers/regulator/virtual.c @@ -13,6 +13,7 @@ #include #include #include +#include struct virtual_consumer_data { struct mutex lock; @@ -281,6 +282,14 @@ static const struct attribute_group regulator_virtual_attr_group = { .attrs = regulator_virtual_attributes, }; +#ifdef CONFIG_OF +static const struct of_device_id regulator_virtual_consumer_of_match[] = { + { .compatible = "regulator-virtual-consumer" }, + {}, +}; +MODULE_DEVICE_TABLE(of, regulator_virtual_consumer_of_match); +#endif + static int regulator_virtual_probe(struct platform_device *pdev) { char *reg_id = dev_get_platdata(&pdev->dev); @@ -305,6 +314,14 @@ static int regulator_virtual_probe(struct platform_device *pdev) if (drvdata == NULL) return -ENOMEM; + /* + * This virtual consumer does not have any hardware-defined supply + * name, so just allow the regulator to be specified in a property + * named "default-supply" when we're being probed from devicetree. + */ + if (!reg_id && pdev->dev.of_node) + reg_id = "default"; + mutex_init(&drvdata->lock); drvdata->regulator = devm_regulator_get(&pdev->dev, reg_id); @@ -345,6 +362,7 @@ static struct platform_driver regulator_virtual_consumer_driver = { .remove = regulator_virtual_remove, .driver = { .name = "reg-virt-consumer", + .of_match_table = of_match_ptr(regulator_virtual_consumer_of_match), }, }; -- cgit v1.2.3-59-g8ed1b