Re: [PATCH 2/4] iio: adc: at91-sama5d2: initialize hardware after clock is started
From: Jonathan Cameron <jic23@kernel.org>
Date: 2021-03-06 17:21:36
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linux-devicetree, linux-iio, lkml
On Mon, 1 Mar 2021 16:32:54 +0200 Eugen Hristev [off-list ref] wrote:
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.
Fix for existing parts or something only needed for the new devices? If it's a fix we should be looking to back port it so please provide me with a fixes tag. If it's a fix but not super urgent then let me know and we can take it with the rest of this series (and hence keep things simple) Thanks, Jonathan
quoted hunk ↗ jump to hunk
Signed-off-by: Eugen Hristev <redacted> --- drivers/iio/adc/at91-sama5d2_adc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index a7826f097b95..63325f037f09 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c@@ -1832,12 +1832,12 @@ 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);
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