Re: [PATCH 1/5] regulator: s5m8767: Add symbols for hard-coded DVS_RAMP register

[Lee Jones <lee.jones@linaro.org>]

> Add symbols for hard-coded values of BUCK_RAMP field in DVS_RAMP
> register. This simplifies a little the code as register update is called
> only once.
> 
> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> Cc: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>  drivers/regulator/s5m8767.c         |   22 ++++++++++------------
>  include/linux/mfd/samsung/s5m8767.h |   15 +++++++++++++++
>  2 files changed, 25 insertions(+), 12 deletions(-)

<snip>

> diff --git a/include/linux/mfd/samsung/s5m8767.h b/include/linux/mfd/samsung/s5m8767.h
> index 9198377ee859..2ab0b0f03641 100644
> --- a/include/linux/mfd/samsung/s5m8767.h
> +++ b/include/linux/mfd/samsung/s5m8767.h
> @@ -186,4 +186,19 @@ enum s5m8767_regulators {
>  #define S5M8767_ENCTRL_SHIFT		6
>  #define S5M8767_ENCTRL_MASK		(0x3 << S5M8767_ENCTRL_SHIFT)
>  
> +/*
> + * Values for BUCK_RAMP field in DVS_RAMP register, matching raw values
> + * in mV/us.
> + */
> +enum s5m8767_dvs_buck_ramp_values {
> +	S5M8767_DVS_BUCK_RAMP_5		= 0x4,
> +	S5M8767_DVS_BUCK_RAMP_10	= 0x9,
> +	S5M8767_DVS_BUCK_RAMP_12_5	= 0xb,
> +	S5M8767_DVS_BUCK_RAMP_25	= 0xd,
> +	S5M8767_DVS_BUCK_RAMP_50	= 0xe,
> +	S5M8767_DVS_BUCK_RAMP_100	= 0xf,
> +};

Why do these have to be enums?

> +#define S5M8767_DVS_BUCK_RAMP_SHIFT	4
> +#define S5M8767_DVS_BUCK_RAMP_MASK	(0xf << S5M8767_DVS_BUCK_RAMP_SHIFT)
> +
>  #endif /* __LINUX_MFD_S5M8767_H */

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