iio: adc: at91-sama5d2_adc: initialize hardware after clock is started

The hw_init hardware init call must happen after the clock is prepared and
enabled. Otherwise, writing to the registers might lead to a block or
external abort.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/20210901123013.329792-3-eugen.hristev@microchip.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index ea5ca16..1f4d461 100644 (file)
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -1833,12 +1833,12 @@ static int at91_adc_probe(struct platform_device *pdev)
                goto vref_disable;
        }
 
-       at91_adc_hw_init(indio_dev);
-
        ret = clk_prepare_enable(st->per_clk);
        if (ret)
                goto vref_disable;
 
+       at91_adc_hw_init(indio_dev);
+
        platform_set_drvdata(pdev, indio_dev);
 
        ret = at91_adc_buffer_and_trigger_init(&pdev->dev, indio_dev);