[v2,2/3] iio: adc: mt7622: add support for suspend/resume.
diff mbox

Message ID 1498457502-3669-3-git-send-email-zhiyong.tao@mediatek.com
State New
Headers show

Commit Message

Zhiyong Tao June 26, 2017, 6:11 a.m. UTC
This patch supports auxadc suspend/resume flow.
Disable auxadc clk and power in suspend function.
Enable axuadc clk and power in resume function.

Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
---
 drivers/iio/adc/mt6577_auxadc.c |   38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

Comments

Jonathan Cameron July 1, 2017, 9:19 a.m. UTC | #1
On Mon, 26 Jun 2017 14:11:41 +0800
Zhiyong Tao <zhiyong.tao@mediatek.com> wrote:

> This patch supports auxadc suspend/resume flow.
> Disable auxadc clk and power in suspend function.
> Enable axuadc clk and power in resume function.
> 
> Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
small point inline.

Applied to the togreg branch of iio.git and pushed out as testing for the
autobuilders to play with it.

Thanks,

Jonathan
> ---
>  drivers/iio/adc/mt6577_auxadc.c |   38 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 38 insertions(+)
> 
> diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
> index 2d104c8..c174b73 100644
> --- a/drivers/iio/adc/mt6577_auxadc.c
> +++ b/drivers/iio/adc/mt6577_auxadc.c
> @@ -184,6 +184,39 @@ static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev,
>  	.read_raw = &mt6577_auxadc_read_raw,
>  };
>  
> +#ifdef CONFIG_PM_SLEEP
There is no need to have the ifdefs as well as the __maybe_unused.
I'll drop them when applying.
> +static int __maybe_unused mt6577_auxadc_resume(struct device *dev)
> +{
> +	struct iio_dev *indio_dev = dev_get_drvdata(dev);
> +	struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
> +	int ret;
> +
> +	ret = clk_prepare_enable(adc_dev->adc_clk);
> +	if (ret) {
> +		pr_err("failed to enable auxadc clock\n");
> +		return ret;
> +	}
> +
> +	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
> +			      MT6577_AUXADC_PDN_EN, 0);
> +	mdelay(MT6577_AUXADC_POWER_READY_MS);
> +
> +	return 0;
> +}
> +
> +static int __maybe_unused mt6577_auxadc_suspend(struct device *dev)
> +{
> +	struct iio_dev *indio_dev = dev_get_drvdata(dev);
> +	struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
> +
> +	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
> +			      0, MT6577_AUXADC_PDN_EN);
> +	clk_disable_unprepare(adc_dev->adc_clk);
> +
> +	return 0;
> +}
> +#endif
> +
>  static int mt6577_auxadc_probe(struct platform_device *pdev)
>  {
>  	struct mt6577_auxadc_device *adc_dev;
> @@ -269,6 +302,10 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static SIMPLE_DEV_PM_OPS(mt6577_auxadc_pm_ops,
> +			 mt6577_auxadc_suspend,
> +			 mt6577_auxadc_resume);
> +
>  static const struct of_device_id mt6577_auxadc_of_match[] = {
>  	{ .compatible = "mediatek,mt2701-auxadc", },
>  	{ .compatible = "mediatek,mt8173-auxadc", },
> @@ -280,6 +317,7 @@ static int mt6577_auxadc_remove(struct platform_device *pdev)
>  	.driver = {
>  		.name   = "mt6577-auxadc",
>  		.of_match_table = mt6577_auxadc_of_match,
> +		.pm = &mt6577_auxadc_pm_ops,
>  	},
>  	.probe	= mt6577_auxadc_probe,
>  	.remove	= mt6577_auxadc_remove,

Patch
diff mbox

diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index 2d104c8..c174b73 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -184,6 +184,39 @@  static int mt6577_auxadc_read_raw(struct iio_dev *indio_dev,
 	.read_raw = &mt6577_auxadc_read_raw,
 };
 
+#ifdef CONFIG_PM_SLEEP
+static int __maybe_unused mt6577_auxadc_resume(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
+	int ret;
+
+	ret = clk_prepare_enable(adc_dev->adc_clk);
+	if (ret) {
+		pr_err("failed to enable auxadc clock\n");
+		return ret;
+	}
+
+	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+			      MT6577_AUXADC_PDN_EN, 0);
+	mdelay(MT6577_AUXADC_POWER_READY_MS);
+
+	return 0;
+}
+
+static int __maybe_unused mt6577_auxadc_suspend(struct device *dev)
+{
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct mt6577_auxadc_device *adc_dev = iio_priv(indio_dev);
+
+	mt6577_auxadc_mod_reg(adc_dev->reg_base + MT6577_AUXADC_MISC,
+			      0, MT6577_AUXADC_PDN_EN);
+	clk_disable_unprepare(adc_dev->adc_clk);
+
+	return 0;
+}
+#endif
+
 static int mt6577_auxadc_probe(struct platform_device *pdev)
 {
 	struct mt6577_auxadc_device *adc_dev;
@@ -269,6 +302,10 @@  static int mt6577_auxadc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static SIMPLE_DEV_PM_OPS(mt6577_auxadc_pm_ops,
+			 mt6577_auxadc_suspend,
+			 mt6577_auxadc_resume);
+
 static const struct of_device_id mt6577_auxadc_of_match[] = {
 	{ .compatible = "mediatek,mt2701-auxadc", },
 	{ .compatible = "mediatek,mt8173-auxadc", },
@@ -280,6 +317,7 @@  static int mt6577_auxadc_remove(struct platform_device *pdev)
 	.driver = {
 		.name   = "mt6577-auxadc",
 		.of_match_table = mt6577_auxadc_of_match,
+		.pm = &mt6577_auxadc_pm_ops,
 	},
 	.probe	= mt6577_auxadc_probe,
 	.remove	= mt6577_auxadc_remove,