[PATCH 1/2] Add initial regulator support

[Alexander Aring]

Hi Sascha,

On Mon, Apr 28, 2014 at 10:18:40AM +0200, Sascha Hauer wrote:
> Provide minimal regulator support. Only supported operations are enabling
> and disabling regulators. Association of devices with their regulators is
> limited to devicetree only. If regulator support is disabled the API expands
> to static inline stubs so consumers can still use the API.
> 
> Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
> ---
>  commands/Kconfig           |   8 ++
>  commands/Makefile          |   1 +
>  commands/regulator.c       |  33 ++++++
>  drivers/Kconfig            |   1 +
>  drivers/Makefile           |   1 +
>  drivers/regulator/Kconfig  |  13 +++
>  drivers/regulator/Makefile |   2 +
>  drivers/regulator/core.c   | 262 +++++++++++++++++++++++++++++++++++++++++++++
>  drivers/regulator/fixed.c  | 103 ++++++++++++++++++
>  include/regulator.h        |  47 ++++++++
>  10 files changed, 471 insertions(+)
>  create mode 100644 commands/regulator.c
>  create mode 100644 drivers/regulator/Kconfig
>  create mode 100644 drivers/regulator/Makefile
>  create mode 100644 drivers/regulator/core.c
>  create mode 100644 drivers/regulator/fixed.c
>  create mode 100644 include/regulator.h
> 
> diff --git a/commands/Kconfig b/commands/Kconfig
> index cc014f3..510cc91 100644
> --- a/commands/Kconfig
> +++ b/commands/Kconfig
> @@ -690,6 +690,14 @@ config CMD_GPIO
>  	  include gpio_set_value, gpio_get_value, gpio_direction_input and
>  	  gpio_direction_output commands to control gpios.
>  
> +config CMD_REGULATOR
> +	bool
> +	depends on REGULATOR
> +	prompt "regulator command"
> +	help
> +	  the regulator command lists the currently registered regulators and
> +	  their current state.
> +
>  config CMD_UNCOMPRESS
>  	bool
>  	select UNCOMPRESS
> diff --git a/commands/Makefile b/commands/Makefile
> index e463031..7836515 100644
> --- a/commands/Makefile
> +++ b/commands/Makefile
> @@ -95,3 +95,4 @@ obj-$(CONFIG_CMD_BOOT)		+= boot.o
...
> +};
> +
> +static int regulator_fixed_enable(struct regulator_dev *rdev)
> +{
> +	struct regulator_fixed *fix = container_of(rdev, struct regulator_fixed, rdev);
> +
> +	if (!gpio_is_valid(fix->gpio))
> +		return 0;
> +
This should return a errno like the above one "-EINVAL". Or?

> +	return gpio_direction_output(fix->gpio, !fix->active_low);
> +}
> +
> +static int regulator_fixed_disable(struct regulator_dev *rdev)
> +{
> +	struct regulator_fixed *fix = container_of(rdev, struct regulator_fixed, rdev);
> +
> +	if (!gpio_is_valid(fix->gpio))
> +		return -EINVAL;
> +

like this.

- Alex