linux-kernel - [PATCH v4 09/12] iio: adc: ad7192: use devm_clk_get

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Message-Id: <20210513120752.90074-10-aardelean@deviqon.com>
Date:   Thu, 13 May 2021 15:07:49 +0300
From:   Alexandru Ardelean <aardelean@...iqon.com>
To:     linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     jic23@...nel.org, Jonathan.Cameron@...wei.com,
        alexandru.tachici@...log.com, linux@...iqon.com,
        Alexandru Ardelean <aardelean@...iqon.com>
Subject: [PATCH v4 09/12] iio: adc: ad7192: use devm_clk_get_optional() for mclk

The devm_clk_get_optional() helper returns NULL when devm_clk_get() returns
-ENOENT.
This makes things slightly cleaner. The added benefit is mostly cosmetic.

Also, a minor detail with this call, is that the reference for the parent
device is taken as `spi->dev` instead of `&st->sd.spi->dev` (which looks a
little quirky).

Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
---
 drivers/iio/adc/ad7192.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 1141cc13a124..523cf3bc955b 100644
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -326,7 +326,7 @@ static int ad7192_of_clock_select(struct ad7192_state *st)
 	clock_sel = AD7192_CLK_INT;
 
 	/* use internal clock */
-	if (PTR_ERR(st->mclk) == -ENOENT) {
+	if (st->mclk) {
 		if (of_property_read_bool(np, "adi,int-clock-output-enable"))
 			clock_sel = AD7192_CLK_INT_CO;
 	} else {
@@ -978,8 +978,8 @@ static int ad7192_probe(struct spi_device *spi)
 
 	st->fclk = AD7192_INT_FREQ_MHZ;
 
-	st->mclk = devm_clk_get(&st->sd.spi->dev, "mclk");
-	if (IS_ERR(st->mclk) && PTR_ERR(st->mclk) != -ENOENT) {
+	st->mclk = devm_clk_get_optional(&spi->dev, "mclk");
+	if (IS_ERR(st->mclk)) {
 		ret = PTR_ERR(st->mclk);
 		goto error_remove_trigger;
 	}
-- 
2.31.1