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drivers: iio: adc: Add support for suspend to disk

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Add support to adc driver for suspend to disk feature.
Free interrupts during hibernation and re-register them during
resume.

Change-Id: I71d2aed51f0697e712db59dcc1ef4af0fa98aae4
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>
[quic_subbaram@quicinc.com: Fixed merge conflict]
Signed-off-by: Subbaraman Narayanamurthy <quic_subbaram@quicinc.com>
This commit is contained in:
Rama Krishna Phani A 2019-02-13 20:24:50 +05:30 committed by David Collins
parent ee48149cfa
commit bb4024cac6
1 changed files with 38 additions and 6 deletions
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44
drivers/iio/adc/qcom-spmi-adc5.c
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@ -154,6 +154,7 @@ struct adc5_chip {
struct completion complete;
struct mutex lock;
const struct adc5_data *data;
int irq_eoc;
};
static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)
@ -961,7 +962,7 @@ static int adc5_probe(struct platform_device *pdev)
struct adc5_chip *adc;
struct regmap *regmap;
const char *irq_name;
int ret, irq_eoc;
int ret;
u32 reg;
regmap = dev_get_regmap(dev->parent, NULL);
@ -981,6 +982,8 @@ static int adc5_probe(struct platform_device *pdev)
adc->dev = dev;
adc->base = reg;
dev_set_drvdata(&pdev->dev, adc);
init_completion(&adc->complete);
mutex_init(&adc->lock);
@ -990,17 +993,17 @@ static int adc5_probe(struct platform_device *pdev)
return ret;
}
irq_eoc = platform_get_irq(pdev, 0);
if (irq_eoc < 0) {
if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
return irq_eoc;
adc->irq_eoc = platform_get_irq(pdev, 0);
if (adc->irq_eoc < 0) {
if (adc->irq_eoc == -EPROBE_DEFER || adc->irq_eoc == -EINVAL)
return adc->irq_eoc;
adc->poll_eoc = true;
} else {
irq_name = "pm-adc5";
if (adc->data->name)
irq_name = adc->data->name;
ret = devm_request_irq(dev, irq_eoc, adc5_isr, 0,
ret = devm_request_irq(dev, adc->irq_eoc, adc5_isr, 0,
irq_name, adc);
if (ret)
return ret;
@ -1015,10 +1018,39 @@ static int adc5_probe(struct platform_device *pdev)
return devm_iio_device_register(dev, indio_dev);
}
static int adc_restore(struct device *dev)
{
int ret = 0;
struct adc5_chip *adc = dev_get_drvdata(dev);
if (adc->irq_eoc > 0)
ret = devm_request_irq(dev, adc->irq_eoc, adc5_isr, 0,
"pm-adc5", adc);
return ret;
}
static int adc_freeze(struct device *dev)
{
struct adc5_chip *adc = dev_get_drvdata(dev);
if (adc->irq_eoc > 0)
devm_free_irq(dev, adc->irq_eoc, adc);
return 0;
}
static const struct dev_pm_ops adc_pm_ops = {
.freeze = adc_freeze,
.thaw = adc_restore,
.restore = adc_restore,
};
static struct platform_driver adc5_driver = {
.driver = {
.name = "qcom-spmi-adc5",
.of_match_table = adc5_match_table,
.pm = &adc_pm_ops,
},
.probe = adc5_probe,
};