[Patch v2 05/10] iio: using dev_get_drvdata directly

[Fuqian Huang]

Several drivers cast a struct device pointer to a struct
platform_device pointer only to then call platform_get_drvdata().
To improve readability, these constructs can be simplified
by using dev_get_drvdata() directly.

Signed-off-by: Fuqian Huang <huangfq.dax...@gmail.com>
---
Changes in v2:
  - Make the commit message more clearly.

 drivers/iio/adc/at91-sama5d2_adc.c | 12 ++++--------
 drivers/iio/adc/at91_adc.c         |  4 ++--
 2 files changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/iio/adc/at91-sama5d2_adc.c 
b/drivers/iio/adc/at91-sama5d2_adc.c
index d384cf0250ff..a2837a0e7cba 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1578,8 +1578,7 @@ static void at91_adc_hw_init(struct at91_adc_state *st)
 static ssize_t at91_adc_get_fifo_state(struct device *dev,
                                       struct device_attribute *attr, char *buf)
 {
-       struct iio_dev *indio_dev =
-                       platform_get_drvdata(to_platform_device(dev));
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
        struct at91_adc_state *st = iio_priv(indio_dev);
 
        return scnprintf(buf, PAGE_SIZE, "%d\n", !!st->dma_st.dma_chan);
@@ -1588,8 +1587,7 @@ static ssize_t at91_adc_get_fifo_state(struct device *dev,
 static ssize_t at91_adc_get_watermark(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
-       struct iio_dev *indio_dev =
-                       platform_get_drvdata(to_platform_device(dev));
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
        struct at91_adc_state *st = iio_priv(indio_dev);
 
        return scnprintf(buf, PAGE_SIZE, "%d\n", st->dma_st.watermark);
@@ -1841,8 +1839,7 @@ static int at91_adc_remove(struct platform_device *pdev)
 
 static __maybe_unused int at91_adc_suspend(struct device *dev)
 {
-       struct iio_dev *indio_dev =
-                       platform_get_drvdata(to_platform_device(dev));
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
        struct at91_adc_state *st = iio_priv(indio_dev);
 
        /*
@@ -1862,8 +1859,7 @@ static __maybe_unused int at91_adc_suspend(struct device 
*dev)
 
 static __maybe_unused int at91_adc_resume(struct device *dev)
 {
-       struct iio_dev *indio_dev =
-                       platform_get_drvdata(to_platform_device(dev));
+       struct iio_dev *indio_dev = dev_get_drvdata(dev);
        struct at91_adc_state *st = iio_priv(indio_dev);
        int ret;
 
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index d23709ed9049..32f1c4a33b20 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -1359,7 +1359,7 @@ static int at91_adc_remove(struct platform_device *pdev)
 #ifdef CONFIG_PM_SLEEP
 static int at91_adc_suspend(struct device *dev)
 {
-       struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
+       struct iio_dev *idev = dev_get_drvdata(dev);
        struct at91_adc_state *st = iio_priv(idev);
 
        pinctrl_pm_select_sleep_state(dev);
@@ -1370,7 +1370,7 @@ static int at91_adc_suspend(struct device *dev)
 
 static int at91_adc_resume(struct device *dev)
 {
-       struct iio_dev *idev = platform_get_drvdata(to_platform_device(dev));
+       struct iio_dev *idev = dev_get_drvdata(dev);
        struct at91_adc_state *st = iio_priv(idev);
 
        clk_prepare_enable(st->clk);
-- 
2.11.0