iio: adc: meson-saradc: remove irrelevant clock "sana"

The "sana" clock is not used at SAR ADC module in Amlogic Meson SoC,
it is irrelevant for the SAR ADC.

Signed-off-by: Xingyu Chen <xingyu.chen@amlogic.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/meson_saradc.c

@@ -231,7 +231,6 @@ struct meson_sar_adc_priv {
 	const struct meson_sar_adc_data		*data;
 	struct clk				*clkin;
 	struct clk				*core_clk;
-	struct clk				*sana_clk;
 	struct clk				*adc_sel_clk;
 	struct clk				*adc_clk;
 	struct clk_gate				clk_gate;
@@ -708,12 +707,6 @@ static int meson_sar_adc_hw_enable(struct iio_dev *indio_dev)
 		goto err_core_clk;
 	}
 
-	ret = clk_prepare_enable(priv->sana_clk);
-	if (ret) {
-		dev_err(indio_dev->dev.parent, "failed to enable sana clk\n");
-		goto err_sana_clk;
-	}
-
 	regval = FIELD_PREP(MESON_SAR_ADC_REG0_FIFO_CNT_IRQ_MASK, 1);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG0,
 			   MESON_SAR_ADC_REG0_FIFO_CNT_IRQ_MASK, regval);
@@ -741,8 +734,6 @@ err_adc_clk:
 			   MESON_SAR_ADC_REG3_ADC_EN, 0);
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG11,
 			   MESON_SAR_ADC_REG11_BANDGAP_EN, 0);
-	clk_disable_unprepare(priv->sana_clk);
-err_sana_clk:
 	clk_disable_unprepare(priv->core_clk);
 err_core_clk:
 	regulator_disable(priv->vref);
@@ -768,7 +759,6 @@ static int meson_sar_adc_hw_disable(struct iio_dev *indio_dev)
 	regmap_update_bits(priv->regmap, MESON_SAR_ADC_REG11,
 			   MESON_SAR_ADC_REG11_BANDGAP_EN, 0);
 
-	clk_disable_unprepare(priv->sana_clk);
 	clk_disable_unprepare(priv->core_clk);
 
 	regulator_disable(priv->vref);
@@ -961,16 +951,6 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->core_clk);
 	}
 
-	priv->sana_clk = devm_clk_get(&pdev->dev, "sana");
-	if (IS_ERR(priv->sana_clk)) {
-		if (PTR_ERR(priv->sana_clk) == -ENOENT) {
-			priv->sana_clk = NULL;
-		} else {
-			dev_err(&pdev->dev, "failed to get sana clk\n");
-			return PTR_ERR(priv->sana_clk);
-		}
-	}
-
 	priv->adc_clk = devm_clk_get(&pdev->dev, "adc_clk");
 	if (IS_ERR(priv->adc_clk)) {
 		if (PTR_ERR(priv->adc_clk) == -ENOENT) {