linux-kernel - Re: [PATCH 2/2] iio: sx9324: Add setting for CS idle mode

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Date:   Mon, 2 May 2022 17:50:46 -0700
From:   Gwendal Grignou <gwendal@...omium.org>
To:     Stephen Boyd <swboyd@...omium.org>
Cc:     Jonathan Cameron <jic23@...nel.org>, linux-kernel@...r.kernel.org,
        patches@...ts.linux.dev, devicetree@...r.kernel.org,
        linux-iio@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>
Subject: Re: [PATCH 2/2] iio: sx9324: Add setting for CS idle mode

Reviewed-by: Gwendal Grignou <gwendal@...omium.org>

On Mon, May 2, 2022 at 5:42 PM Stephen Boyd <swboyd@...omium.org> wrote:
>
> Based on device tree setting, set the CS idle mode.
>
> Cc: Gwendal Grignou <gwendal@...omium.org>
> Signed-off-by: Stephen Boyd <swboyd@...omium.org>
> ---
>  drivers/iio/proximity/sx9324.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>
> diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c
> index 7f367f63e362..79683f0d4e9a 100644
> --- a/drivers/iio/proximity/sx9324.c
> +++ b/drivers/iio/proximity/sx9324.c
> @@ -57,6 +57,11 @@
>         GENMASK(SX9324_REG_AFE_CTRL0_RINT_SHIFT + 1, \
>                 SX9324_REG_AFE_CTRL0_RINT_SHIFT)
>  #define SX9324_REG_AFE_CTRL0_RINT_LOWEST       0x00
> +#define SX9324_REG_AFE_CTRL0_CSIDLE_SHIFT      4
> +#define SX9324_REG_AFE_CTRL0_CSIDLE_MASK \
> +       GENMASK(SX9324_REG_AFE_CTRL0_CSIDLE_SHIFT + 1, \
> +               SX9324_REG_AFE_CTRL0_CSIDLE_SHIFT)
> +#define SX9324_REG_AFE_CTRL0_RINT_LOWEST       0x00
>  #define SX9324_REG_AFE_CTRL1           0x21
>  #define SX9324_REG_AFE_CTRL2           0x22
>  #define SX9324_REG_AFE_CTRL3           0x23
> @@ -872,6 +877,8 @@ sx9324_get_default_reg(struct device *dev, int idx,
>  {
>         static const char * const sx9324_rints[] = { "lowest", "low", "high",
>                 "highest" };
> +       static const char * const sx9324_csidle[] = { "hz", "hz", "gnd",
> +               "vdd" };
>  #define SX9324_PIN_DEF "semtech,ph0-pin"
>  #define SX9324_RESOLUTION_DEF "semtech,ph01-resolution"
>  #define SX9324_PROXRAW_DEF "semtech,ph01-proxraw-strength"
> @@ -901,6 +908,15 @@ sx9324_get_default_reg(struct device *dev, int idx,
>                 reg_def->def = raw;
>                 break;
>         case SX9324_REG_AFE_CTRL0:
> +               ret = device_property_read_string(dev,
> +                               "semtech,cs-idle-sleep", &res);
> +               if (!ret)
> +                       ret = match_string(sx9324_csidle, ARRAY_SIZE(sx9324_csidle), res);
> +               if (ret >= 0) {
> +                       reg_def->def &= ~SX9324_REG_AFE_CTRL0_CSIDLE_MASK;
> +                       reg_def->def |= ret << SX9324_REG_AFE_CTRL0_CSIDLE_SHIFT;
> +               }
> +
>                 ret = device_property_read_string(dev,
>                                 "semtech,int-comp-resistor", &res);
>                 if (ret)
> --
> https://chromeos.dev
>