From: Fabrice Gasnier <fabrice.gasnier@st.com>
To: <jic23@kernel.org>, <robh+dt@kernel.org>, <alexandre.torgue@st.com>
Cc: <mark.rutland@arm.com>, <mcoquelin.stm32@gmail.com>,
<lars@metafoo.de>, <knaack.h@gmx.de>, <pmeerw@pmeerw.net>,
<fabrice.gasnier@st.com>, <linux-iio@vger.kernel.org>,
<devicetree@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Subject: [PATCH 2/5] iio: adc: stm32-adc: add missing vdda-supply
Date: Wed, 19 Jun 2019 14:29:55 +0200 [thread overview]
Message-ID: <1560947398-11592-3-git-send-email-fabrice.gasnier@st.com> (raw)
In-Reply-To: <1560947398-11592-1-git-send-email-fabrice.gasnier@st.com>
Add missing vdda-supply, analog power supply, to STM32 ADC. When vdda is
an independent supply, it needs to be properly turned on or off to supply
the ADC.
Fixes: 1add69880240 ("iio: adc: Add support for STM32 ADC core").
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
drivers/iio/adc/stm32-adc-core.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 2327ec1..1f7ce51 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 @@ static int stm32_adc_core_hw_start(struct device *dev)
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);
--
2.7.4
next prev parent reply other threads:[~2019-06-19 12:31 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-19 12:29 [PATCH 0/5] Add missing vdda-supply to STM32 ADC Fabrice Gasnier
2019-06-19 12:29 ` [PATCH 1/5] dt-bindings: iio: adc: stm32: add missing vdda supply Fabrice Gasnier
2019-06-22 9:36 ` Jonathan Cameron
2019-06-19 12:29 ` Fabrice Gasnier [this message]
2019-06-22 9:39 ` [PATCH 2/5] iio: adc: stm32-adc: add missing vdda-supply Jonathan Cameron
2019-06-19 12:29 ` [PATCH 3/5] ARM: dts: stm32: remove fixed regulator unit address on stm32429i-eval Fabrice Gasnier
2019-06-19 12:29 ` [PATCH 4/5] ARM: dts: stm32: add missing vdda-supply to adc " Fabrice Gasnier
2019-06-19 12:29 ` [PATCH 5/5] ARM: dts: stm32: add missing vdda-supply to adc on stm32h743i-eval Fabrice Gasnier
2019-07-26 16:00 ` [PATCH 0/5] Add missing vdda-supply to STM32 ADC Alexandre Torgue
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