linux-kernel - Re: [PATCH v2 1/1] iio: adc: meson: add separate config for axg SoC family

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Message-ID: <20231125172508.2a2242bf@jic23-huawei>
Date:   Sat, 25 Nov 2023 17:25:08 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     George Stark <gnstark@...utedevices.com>
Cc:     <lars@...afoo.de>, <neil.armstrong@...aro.org>,
        <khilman@...libre.com>, <jbrunet@...libre.com>,
        <martin.blumenstingl@...glemail.com>,
        <andriy.shevchenko@...ux.intel.com>, <nuno.sa@...log.com>,
        <u.kleine-koenig@...gutronix.de>, <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-amlogic@...ts.infradead.org>, <kernel@...utedevices.com>
Subject: Re: [PATCH v2 1/1] iio: adc: meson: add separate config for axg SoC
 family

On Wed, 22 Nov 2023 10:47:41 +0300
George Stark <gnstark@...utedevices.com> wrote:

> According to Amlogic custom kernels ADC of axg SoC family has
> vref_select and requires this setting to work nominally and thus
> needs a separate config.
> 
> Signed-off-by: George Stark <gnstark@...utedevices.com>
> Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>

Is this a fix?  If so, please provide a fixes tag.
Or is it aligning with the vendor kernels and we don't know if
it's strictly necessary or not?

> ---
>  drivers/iio/adc/meson_saradc.c | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
> index db280da9edbf..34555a85f131 100644
> --- a/drivers/iio/adc/meson_saradc.c
> +++ b/drivers/iio/adc/meson_saradc.c
> @@ -1242,6 +1242,20 @@ static const struct meson_sar_adc_param meson_sar_adc_gxl_param = {
>  	.cmv_select = 1,
>  };
>  
> +static const struct meson_sar_adc_param meson_sar_adc_axg_param = {
> +	.has_bl30_integration = true,
> +	.clock_rate = 1200000,
> +	.bandgap_reg = MESON_SAR_ADC_REG11,
> +	.regmap_config = &meson_sar_adc_regmap_config_gxbb,
> +	.resolution = 12,
> +	.disable_ring_counter = 1,
> +	.has_reg11 = true,
> +	.vref_volatge = 1,
> +	.has_vref_select = true,
> +	.vref_select = VREF_VDDA,
> +	.cmv_select = 1,
> +};
> +
>  static const struct meson_sar_adc_param meson_sar_adc_g12a_param = {
>  	.has_bl30_integration = false,
>  	.clock_rate = 1200000,
> @@ -1286,7 +1300,7 @@ static const struct meson_sar_adc_data meson_sar_adc_gxm_data = {
>  };
>  
>  static const struct meson_sar_adc_data meson_sar_adc_axg_data = {
> -	.param = &meson_sar_adc_gxl_param,
> +	.param = &meson_sar_adc_axg_param,
>  	.name = "meson-axg-saradc",
>  };
>