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path: root/drivers/iio/adc/stm32-adc-core.c
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Diffstat (limited to 'drivers/iio/adc/stm32-adc-core.c')
-rw-r--r--drivers/iio/adc/stm32-adc-core.c21
1 files changed, 20 insertions, 1 deletions
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 2327ec18b40c..1f7ce5186dfc 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -87,6 +87,7 @@ struct stm32_adc_priv_cfg {
* @domain: irq domain reference
* @aclk: clock reference for the analog circuitry
* @bclk: bus clock common for all ADCs, depends on part used
+ * @vdda: vdda analog supply reference
* @vref: regulator reference
* @cfg: compatible configuration data
* @common: common data for all ADC instances
@@ -97,6 +98,7 @@ struct stm32_adc_priv {
struct irq_domain *domain;
struct clk *aclk;
struct clk *bclk;
+ struct regulator *vdda;
struct regulator *vref;
const struct stm32_adc_priv_cfg *cfg;
struct stm32_adc_common common;
@@ -394,10 +396,16 @@ static int stm32_adc_core_hw_start(struct device *dev)
struct stm32_adc_priv *priv = to_stm32_adc_priv(common);
int ret;
+ ret = regulator_enable(priv->vdda);
+ if (ret < 0) {
+ dev_err(dev, "vdda enable failed %d\n", ret);
+ return ret;
+ }
+
ret = regulator_enable(priv->vref);
if (ret < 0) {
dev_err(dev, "vref enable failed\n");
- return ret;
+ goto err_vdda_disable;
}
if (priv->bclk) {
@@ -425,6 +433,8 @@ err_bclk_disable:
clk_disable_unprepare(priv->bclk);
err_regulator_disable:
regulator_disable(priv->vref);
+err_vdda_disable:
+ regulator_disable(priv->vdda);
return ret;
}
@@ -441,6 +451,7 @@ static void stm32_adc_core_hw_stop(struct device *dev)
if (priv->bclk)
clk_disable_unprepare(priv->bclk);
regulator_disable(priv->vref);
+ regulator_disable(priv->vdda);
}
static int stm32_adc_probe(struct platform_device *pdev)
@@ -468,6 +479,14 @@ static int stm32_adc_probe(struct platform_device *pdev)
return PTR_ERR(priv->common.base);
priv->common.phys_base = res->start;
+ priv->vdda = devm_regulator_get(&pdev->dev, "vdda");
+ if (IS_ERR(priv->vdda)) {
+ ret = PTR_ERR(priv->vdda);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "vdda get failed, %d\n", ret);
+ return ret;
+ }
+
priv->vref = devm_regulator_get(&pdev->dev, "vref");
if (IS_ERR(priv->vref)) {
ret = PTR_ERR(priv->vref);