linux-kernel - [PATCH v3 11/14] iio: ad7606: simplify using devm_regulator_get

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Date:   Fri, 19 Aug 2022 22:20:18 +0300
From:   Matti Vaittinen <mazziesaccount@...il.com>
To:     Matti Vaittinen <mazziesaccount@...il.com>,
        Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc:     Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 11/14] iio: ad7606: simplify using
 devm_regulator_get_enable()

Drop open-coded pattern: 'devm_regulator_get(), regulator_enable(),
add_action_or_reset(regulator_disable)' and use the
devm_regulator_get_enable() and drop the pointer to the regulator.
This simplifies code and makes it less tempting to add manual control
for the regulator which is also controlled by devm.

Signed-off-by: Matti Vaittinen <mazziesaccount@...il.com>

---
v2 => v3:
New patch
---
 drivers/iio/adc/ad7606.c | 22 +++-------------------
 drivers/iio/adc/ad7606.h |  1 -
 2 files changed, 3 insertions(+), 20 deletions(-)

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index ba24f99523e0..dd6b603f65ea 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -557,13 +557,6 @@ static const struct iio_trigger_ops ad7606_trigger_ops = {
 	.validate_device = iio_trigger_validate_own_device,
 };
 
-static void ad7606_regulator_disable(void *data)
-{
-	struct ad7606_state *st = data;
-
-	regulator_disable(st->reg);
-}
-
 int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 		 const char *name, unsigned int id,
 		 const struct ad7606_bus_ops *bops)
@@ -589,19 +582,10 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 	st->scale_avail = ad7606_scale_avail;
 	st->num_scales = ARRAY_SIZE(ad7606_scale_avail);
 
-	st->reg = devm_regulator_get(dev, "avcc");
-	if (IS_ERR(st->reg))
-		return PTR_ERR(st->reg);
-
-	ret = regulator_enable(st->reg);
-	if (ret) {
-		dev_err(dev, "Failed to enable specified AVcc supply\n");
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(dev, ad7606_regulator_disable, st);
+	ret = devm_regulator_get_enable(dev, "avcc");
 	if (ret)
-		return ret;
+		return dev_err_probe(dev, ret,
+				     "Failed to enable specified AVcc supply\n");
 
 	st->chip_info = &ad7606_chip_info_tbl[id];
 
diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
index 2dc4f599f9df..924a2d1a6d94 100644
--- a/drivers/iio/adc/ad7606.h
+++ b/drivers/iio/adc/ad7606.h
@@ -92,7 +92,6 @@ struct ad7606_chip_info {
 struct ad7606_state {
 	struct device			*dev;
 	const struct ad7606_chip_info	*chip_info;
-	struct regulator		*reg;
 	const struct ad7606_bus_ops	*bops;
 	unsigned int			range[16];
 	unsigned int			oversampling;
-- 
2.37.1


-- 
Matti Vaittinen, Linux device drivers
ROHM Semiconductors, Finland SWDC
Kiviharjunlenkki 1E
90220 OULU
FINLAND

~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~
Simon says - in Latin please.
~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~
Thanks to Simon Glass for the translation =] 

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