Re: [PATCH V3 4/7] backlight: qcom-wled: Rename PM8941* to WLED3

Bjorn Andersson
2018-06-19T23:09:14Z

On Tue 19 Jun 04:13 PDT 2018, Kiran Gunda wrote:

> Rename the PM8941* references as WLED3 to make the
> driver generic and have WLED support for other PMICs.
>

Looks good, just three minor comments below.

> Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>
> ---
> drivers/video/backlight/qcom-wled.c | 248 ++++++++++++++++++------------------
> 1 file changed, 125 insertions(+), 123 deletions(-)
>
> diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
> index 0b6d219..812f3cb 100644
> --- a/drivers/video/backlight/qcom-wled.c
> +++ b/drivers/video/backlight/qcom-wled.c
> @@ -18,77 +18,79 @@
> #include <linux/regmap.h>
>
> /* From DT binding */
> -#define PM8941_WLED_DEFAULT_BRIGHTNESS 2048
> +#define WLED_DEFAULT_BRIGHTNESS 2048
>
> -#define PM8941_WLED_REG_VAL_BASE 0x40
> -#define PM8941_WLED_REG_VAL_MAX 0xFFF
> +#define WLED3_SINK_REG_BRIGHT_MAX 0xFFF
> +#define WLED3_CTRL_REG_VAL_BASE 0x40
>
> -#define PM8941_WLED_REG_MOD_EN 0x46
> -#define PM8941_WLED_REG_MOD_EN_BIT BIT(7)
> -#define PM8941_WLED_REG_MOD_EN_MASK BIT(7)
> +/* WLED3 control registers */
> +#define WLED3_CTRL_REG_MOD_EN 0x46
> +#define WLED3_CTRL_REG_MOD_EN_BIT BIT(7)
> +#define WLED3_CTRL_REG_MOD_EN_MASK BIT(7)
>
> -#define PM8941_WLED_REG_SYNC 0x47

These are in address order, any reason why WLED3_SINK_REG_SYNC moved
down?

> -#define PM8941_WLED_REG_SYNC_MASK 0x07
> -#define PM8941_WLED_REG_SYNC_LED1 BIT(0)
> -#define PM8941_WLED_REG_SYNC_LED2 BIT(1)
> -#define PM8941_WLED_REG_SYNC_LED3 BIT(2)
> -#define PM8941_WLED_REG_SYNC_ALL 0x07
> -#define PM8941_WLED_REG_SYNC_CLEAR 0x00
> +#define WLED3_CTRL_REG_FREQ 0x4c
> +#define WLED3_CTRL_REG_FREQ_MASK 0x0f
>
> -#define PM8941_WLED_REG_FREQ 0x4c
> -#define PM8941_WLED_REG_FREQ_MASK 0x0f
> +#define WLED3_CTRL_REG_OVP 0x4d
> +#define WLED3_CTRL_REG_OVP_MASK 0x03
>
> -#define PM8941_WLED_REG_OVP 0x4d
> -#define PM8941_WLED_REG_OVP_MASK 0x03
> +#define WLED3_CTRL_REG_ILIMIT 0x4e
> +#define WLED3_CTRL_REG_ILIMIT_MASK 0x07
>
> -#define PM8941_WLED_REG_BOOST 0x4e
> -#define PM8941_WLED_REG_BOOST_MASK 0x07
> +/* WLED3 sink registers */
> +#define WLED3_SINK_REG_SYNC 0x47
> +#define WLED3_SINK_REG_SYNC_MASK 0x07
> +#define WLED3_SINK_REG_SYNC_LED1 BIT(0)
> +#define WLED3_SINK_REG_SYNC_LED2 BIT(1)
> +#define WLED3_SINK_REG_SYNC_LED3 BIT(2)
> +#define WLED3_SINK_REG_SYNC_ALL 0x07
> +#define WLED3_SINK_REG_SYNC_CLEAR 0x00
>
[..]
> -struct pm8941_wled_config {
> - u32 i_boost_limit;
> +struct wled_config {
> + u32 boost_i_limit;
> u32 ovp;
> u32 switch_freq;
> u32 num_strings;
> - u32 i_limit;
> + u32 string_i_limit;

Changing the members in this struct seems unrelated.

> bool cs_out_en;
> bool ext_gen;
> bool cabc_en;
> };
>
[..]
> -MODULE_DESCRIPTION("pm8941 wled driver");
> +MODULE_DESCRIPTION("qcom wled driver");

I would prefer if this was "Qualcomm WLED driver".

> MODULE_LICENSE("GPL v2");

Regards,
Bjorn