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Commit 5236bbc6 authored by Zhiyong Tao's avatar Zhiyong Tao Committed by Jonathan Cameron
Browse files

iio: adc: mt7622: add support for suspend/resume. 



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: default avatarZhiyong Tao <zhiyong.tao@mediatek.com>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent a77c832c

drivers/iio/adc/mt6577_auxadc.c

+36 −0
Original line number Diff line number Diff line
@@ -184,6 +184,37 @@ static const struct iio_info mt6577_auxadc_info = { 
	.read_raw = &mt6577_auxadc_read_raw,

};



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;

}



static int mt6577_auxadc_probe(struct platform_device *pdev)

{

	struct mt6577_auxadc_device *adc_dev;
@@ -269,6 +300,10 @@ 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 +315,7 @@ static struct platform_driver mt6577_auxadc_driver = { 
	.driver = {

		.name   = "mt6577-auxadc",

		.of_match_table = mt6577_auxadc_of_match,

		.pm = &mt6577_auxadc_pm_ops,

	},

	.probe	= mt6577_auxadc_probe,

	.remove	= mt6577_auxadc_remove,