[PATCH 3/6] adc: meson-saradc: skip hardware init only if ADC is enabled

[Neil Armstrong]

On 14/12/2020 12:24, Marek Szyprowski wrote:
> The driver skips hardware initialization if it is already configured by
> the earlier bootloader stage (BL30). Skip the initialization only if the
> hardware is really initialized and enabled.
> 
> Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
> Change-Id: I3e2e2d270ad3e7e7f38e2bc3ce2a924a47b164af

Ditto

> ---
>  drivers/adc/meson-saradc.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/adc/meson-saradc.c b/drivers/adc/meson-saradc.c
> index 998cef24d88..ce7ae990ad0 100644
> --- a/drivers/adc/meson-saradc.c
> +++ b/drivers/adc/meson-saradc.c
> @@ -512,8 +512,11 @@ static int meson_saradc_init(struct meson_saradc_priv *priv)
>  	 * reading the temperature sensor.
>  	 */
>  	regmap_read(priv->regmap, MESON_SAR_ADC_REG3, &regval);
> -	if (regval & MESON_SAR_ADC_REG3_BL30_INITIALIZED)
> -		return 0;
> +	if (regval & MESON_SAR_ADC_REG3_BL30_INITIALIZED) {
> +		regmap_read(priv->regmap, MESON_SAR_ADC_REG3, &regval);
> +		if (regval & MESON_SAR_ADC_REG3_ADC_EN)
> +			return 0;
> +	}
>  
>  	meson_saradc_stop_sample_engine(priv);
>  
> 

Reviewed-by: Neil Armstrong <narmstrong at baylibre.com>