Re: [PATCH 11/14] regulator: s2mps11: Add opmode for S2MPS14 regulators

[Lee Jones]

> S2MPS11/S2MPS14 regulators support different modes of operation:
>  - Always off;
>  - On/Off controlled by pin/GPIO (PWREN/LDOEN/EMMCEN);
>  - Always on;
> This is very similar to S5M8767 regulator driver which also supports
> opmodes (although S5M8767 have also low-power mode).
> 
> This patch adds parsing the operation mode from DTS by reading a
> "op_mode" property from regulator child node.
> 
> The op_mode is then used for enabling the S2MPS14 regulators.
> On S2MPS11 the DTS "op_mode" property is parsed but not used for
> enabling, as this was not tested.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
> Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
> Cc: Mark Brown <broonie@xxxxxxxxxx>
> Cc: Liam Girdwood <lgirdwood@xxxxxxxxx>
> ---
>  drivers/regulator/s2mps11.c         |   98 ++++++++++++++++++++++++++++++++++-
>  include/linux/mfd/samsung/s2mps14.h |   17 ++++++
>  2 files changed, 114 insertions(+), 1 deletion(-)

<snip>

> diff --git a/include/linux/mfd/samsung/s2mps14.h b/include/linux/mfd/samsung/s2mps14.h
> index c4bfb8edc836..69582ae4c971 100644
> --- a/include/linux/mfd/samsung/s2mps14.h
> +++ b/include/linux/mfd/samsung/s2mps14.h
> @@ -149,4 +149,21 @@ enum s2mps14_regulators {
>  #define S2MPS14_LDO_N_VOLTAGES	(S2MPS14_LDO_VSEL_MASK + 1)
>  #define S2MPS14_BUCK_N_VOLTAGES (S2MPS14_BUCK_VSEL_MASK + 1)
>  
> +#define S2MPS14_ENCTRL_SHIFT		6
> +#define S2MPS14_ENCTRL_MASK		(0x3 << S2MPS14_ENCTRL_SHIFT)
> +
> +/*
> + * Values of regulator operation modes match device tree bindings.
> + */
> +enum s2mps14_regulator_opmode {
> +	S2MPS14_REGULATOR_OPMODE_OFF		= 0,
> +	S2MPS14_REGULATOR_OPMODE_ON		= 1,
> +	/* Reserved for compatibility with S5M8767 where this
> +	 * is a low power mode. */

Sorry to be an arse, but can you use proper multi-line comments
please?

The preferred style for long (multi-line) comments is:

        /*
         * This is the preferred style for multi-line
         * comments in the Linux kernel source code.
         * Please use it consistently.
         *
         * Description:  A column of asterisks on the left side,
         * with beginning and ending almost-blank lines.
         */

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org â Open source software for ARM SoCs
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