From 613330a0f73b2698b2210ea89092eb56635fc5d8 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Sat, 3 Mar 2012 12:40:02 +0100 Subject: regulator: provide a helper for registering a fixed regulator Some devices require a regulator to work, but boards may not have a software controllable regulator for this device. Provide a helper function to make it simpler for these boards to register a fixed regulator as a dummy regulator. Signed-off-by: Sascha Hauer Signed-off-by: Mark Brown --- drivers/regulator/fixed-helper.c | 53 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/regulator/fixed-helper.c (limited to 'drivers/regulator/fixed-helper.c') diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c new file mode 100644 index 000000000000..30d0a15b8949 --- /dev/null +++ b/drivers/regulator/fixed-helper.c @@ -0,0 +1,53 @@ +#include +#include +#include +#include + +struct fixed_regulator_data { + struct fixed_voltage_config cfg; + struct regulator_init_data init_data; + struct platform_device pdev; +}; + +static void regulator_fixed_release(struct device *dev) +{ + struct fixed_regulator_data *data = container_of(dev, + struct fixed_regulator_data, pdev.dev); + kfree(data); +} + +/** + * regulator_register_fixed - register a no-op fixed regulator + * @name: supply name + * @id: platform device id + * @supplies: consumers for this regulator + * @num_supplies: number of consumers + */ +struct platform_device *regulator_register_fixed(int id, + struct regulator_consumer_supply *supplies, int num_supplies) +{ + struct fixed_regulator_data *data; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return NULL; + + data->cfg.supply_name = "dummy"; + data->cfg.microvolts = 0; + data->cfg.gpio = -EINVAL; + data->cfg.enabled_at_boot = 1; + data->cfg.init_data = &data->init_data; + + data->init_data.constraints.always_on = 1; + data->init_data.consumer_supplies = supplies; + data->init_data.num_consumer_supplies = num_supplies; + + data->pdev.name = "reg-fixed-voltage"; + data->pdev.id = id; + data->pdev.dev.platform_data = &data->cfg; + data->pdev.dev.release = regulator_fixed_release; + + platform_device_register(&data->pdev); + + return &data->pdev; +} -- cgit v1.2.3 From 5f12760d289fd2da685cb54eebb08c107b146872 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Sat, 31 Mar 2012 16:33:31 +0800 Subject: regulator: fix sysfs name collision between dummy and fixed dummy regulator When regulator_register_fixed() is being used to register fixed dummy regulator, the following line will be seen in the boot log. And the sysfs entry for fixed dummy regulator is not shown. dummy: Failed to create debugfs directory The patch renames the fixed dummy supply to "fixed-dummy" to avoid the name collision with dummy regulator. Signed-off-by: Shawn Guo Signed-off-by: Mark Brown --- drivers/regulator/fixed-helper.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/regulator/fixed-helper.c') diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c index 30d0a15b8949..efb52dcefd35 100644 --- a/drivers/regulator/fixed-helper.c +++ b/drivers/regulator/fixed-helper.c @@ -32,7 +32,7 @@ struct platform_device *regulator_register_fixed(int id, if (!data) return NULL; - data->cfg.supply_name = "dummy"; + data->cfg.supply_name = "fixed-dummy"; data->cfg.microvolts = 0; data->cfg.gpio = -EINVAL; data->cfg.enabled_at_boot = 1; -- cgit v1.2.3 From d49fe3c4cd22965de7422dd81d46110fc3d4deef Mon Sep 17 00:00:00 2001 From: Russ Dill Date: Wed, 21 Mar 2012 22:19:45 -0700 Subject: regulator: Remove non-existent parameter from fixed-helper.c kernel doc Signed-off-by: Russ Dill Signed-off-by: Mark Brown --- drivers/regulator/fixed-helper.c | 1 - 1 file changed, 1 deletion(-) (limited to 'drivers/regulator/fixed-helper.c') diff --git a/drivers/regulator/fixed-helper.c b/drivers/regulator/fixed-helper.c index efb52dcefd35..cacd33c9d042 100644 --- a/drivers/regulator/fixed-helper.c +++ b/drivers/regulator/fixed-helper.c @@ -18,7 +18,6 @@ static void regulator_fixed_release(struct device *dev) /** * regulator_register_fixed - register a no-op fixed regulator - * @name: supply name * @id: platform device id * @supplies: consumers for this regulator * @num_supplies: number of consumers -- cgit v1.2.3