Re: [PATCH V2 5/7] iio: adc: sc27xx: add support for PMIC sc2730

[Baolin Wang]

On Sat, Mar 12, 2022 at 12:47 AM Cixi Geng <gengcixi@xxxxxxxxx> wrote:
>
> From: Cixi Geng <cixi.geng1@xxxxxxxxxx>
>
> sc2730 is the product of sc27xx series.
>
> Signed-off-by: Yuming Zhu <yuming.zhu1@xxxxxxxxxx>
> Signed-off-by: Cixi Geng <cixi.geng1@xxxxxxxxxx>
> ---
>  drivers/iio/adc/sc27xx_adc.c | 108 ++++++++++++++++++++++++++++++++++-
>  1 file changed, 107 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c
> index 2603ce313b07..b89637c051ac 100644
> --- a/drivers/iio/adc/sc27xx_adc.c
> +++ b/drivers/iio/adc/sc27xx_adc.c
> @@ -13,9 +13,11 @@
>  #include <linux/slab.h>
>
>  /* PMIC global registers definition */
> +#define SC2730_MODULE_EN               0x1808
>  #define SC2731_MODULE_EN               0xc08
>  #define SC27XX_MODULE_ADC_EN           BIT(5)
>  #define SC2721_ARM_CLK_EN              0xc0c
> +#define SC2730_ARM_CLK_EN              0x180c
>  #define SC2731_ARM_CLK_EN              0xc10
>  #define SC27XX_CLK_ADC_EN              BIT(5)
>  #define SC27XX_CLK_ADC_CLK_EN          BIT(6)
> @@ -293,6 +295,80 @@ static int sc2721_adc_get_ratio(int channel, int scale)
>         return SC27XX_VOLT_RATIO(1, 1);
>  }
>
> +static int sc2730_adc_get_ratio(int channel, int scale)
> +{
> +       switch (channel) {
> +       case 14:
> +               switch (scale) {
> +               case 0:
> +                       return SC27XX_VOLT_RATIO(68, 900);
> +               case 1:
> +                       return SC27XX_VOLT_RATIO(68, 1760);
> +               case 2:
> +                       return SC27XX_VOLT_RATIO(68, 2327);
> +               case 3:
> +                       return SC27XX_VOLT_RATIO(68, 3654);
> +               default:
> +                       return SC27XX_VOLT_RATIO(1, 1);
> +               }
> +       case 15:
> +               switch (scale) {
> +               case 0:
> +                       return SC27XX_VOLT_RATIO(1, 3);
> +               case 1:
> +                       return SC27XX_VOLT_RATIO(1000, 5865);
> +               case 2:
> +                       return SC27XX_VOLT_RATIO(500, 3879);
> +               case 3:
> +                       return SC27XX_VOLT_RATIO(500, 6090);
> +               default:
> +                       return SC27XX_VOLT_RATIO(1, 1);
> +               }
> +       case 16:
> +               switch (scale) {
> +               case 0:
> +                       return SC27XX_VOLT_RATIO(48, 100);
> +               case 1:
> +                       return SC27XX_VOLT_RATIO(480, 1955);
> +               case 2:
> +                       return SC27XX_VOLT_RATIO(480, 2586);
> +               case 3:
> +                       return SC27XX_VOLT_RATIO(48, 406);
> +               default:
> +                       return SC27XX_VOLT_RATIO(1, 1);
> +               }
> +       case 21:
> +       case 22:
> +       case 23:
> +               switch (scale) {
> +               case 0:
> +                       return SC27XX_VOLT_RATIO(3, 8);
> +               case 1:
> +                       return SC27XX_VOLT_RATIO(375, 1955);
> +               case 2:
> +                       return SC27XX_VOLT_RATIO(375, 2586);
> +               case 3:
> +                       return SC27XX_VOLT_RATIO(300, 3248);
> +               default:
> +                       return SC27XX_VOLT_RATIO(1, 1);
> +               }
> +       default:
> +               switch (scale) {
> +               case 0:
> +                       return SC27XX_VOLT_RATIO(1, 1);
> +               case 1:
> +                       return SC27XX_VOLT_RATIO(1000, 1955);
> +               case 2:
> +                       return SC27XX_VOLT_RATIO(1000, 2586);
> +               case 3:
> +                       return SC27XX_VOLT_RATIO(1000, 4060);
> +               default:
> +                       return SC27XX_VOLT_RATIO(1, 1);
> +               }
> +       }
> +       return SC27XX_VOLT_RATIO(1, 1);
> +}
> +
>  static int sc2731_adc_get_ratio(int channel, int scale)
>  {
>         switch (channel) {
> @@ -349,6 +425,22 @@ static void sc2720_adc_scale_init(struct sc27xx_adc_data *data)
>         }
>  }
>
> +static void sc2730_adc_scale_init(struct sc27xx_adc_data *data)
> +{
> +       int i;
> +
> +       for (i = 0; i < SC27XX_ADC_CHANNEL_MAX; i++) {
> +               if (i == 5 || i == 10 || i == 19 || i == 30 || i == 31)
> +                       data->channel_scale[i] = 3;
> +               else if (i == 7 || i == 9)
> +                       data->channel_scale[i] = 2;
> +               else if (i == 13)
> +                       data->channel_scale[i] = 1;
> +               else
> +                       data->channel_scale[i] = 0;
> +       }
> +}
> +
>  static void sc2731_adc_scale_init(struct sc27xx_adc_data *data)
>  {
>         int i;
> @@ -449,7 +541,8 @@ static int sc27xx_adc_read(struct sc27xx_adc_data *data, int channel,
>                                                     SC27XX_ADC_REFVOL_VDD28,
>                                                     SC27XX_ADC_REFVOL_VDD28);
>                         if (ret_volref) {
> -                               dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n,ret_volref");
> +                               dev_err(data->dev, "failed to set the volref 2.8V, ret_volref = 0x%x\n",
> +                                       ret_volref);

Do not add unrelated changes in this patch.

-- 
Baolin Wang