From dc19fa63ad80a636fdbc1a02153d1ab140cb901f Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Wed, 20 Oct 2021 16:21:10 +0200
Subject: [PATCH] iio: ms5611: Simplify IO callback parameters
Git-commit: dc19fa63ad80a636fdbc1a02153d1ab140cb901f
Patch-mainline: v5.17-rc1
References: git-fixes

The ms5611 passes &indio_dev->dev as a parameter to all its IO callbacks
only to directly cast the struct device back to struct iio_dev. And the
struct iio_dev is then only used to get the drivers state struct.

Simplify this a bit by passing the state struct directly. This makes it a
bit easier to follow what the code is doing.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Link: https://lore.kernel.org/r/20211020142110.7060-1-lars@metafoo.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/iio/pressure/ms5611.h      |  6 +++---
 drivers/iio/pressure/ms5611_core.c |  7 +++----
 drivers/iio/pressure/ms5611_i2c.c  | 11 ++++-------
 drivers/iio/pressure/ms5611_spi.c  | 17 +++++++----------
 4 files changed, 17 insertions(+), 24 deletions(-)

diff --git a/drivers/iio/pressure/ms5611.h b/drivers/iio/pressure/ms5611.h
index 86b1c4b1820d..cbc9349c342a 100644
--- a/drivers/iio/pressure/ms5611.h
+++ b/drivers/iio/pressure/ms5611.h
@@ -50,9 +50,9 @@ struct ms5611_state {
 	const struct ms5611_osr *pressure_osr;
 	const struct ms5611_osr *temp_osr;
 
-	int (*reset)(struct device *dev);
-	int (*read_prom_word)(struct device *dev, int index, u16 *word);
-	int (*read_adc_temp_and_pressure)(struct device *dev,
+	int (*reset)(struct ms5611_state *st);
+	int (*read_prom_word)(struct ms5611_state *st, int index, u16 *word);
+	int (*read_adc_temp_and_pressure)(struct ms5611_state *st,
 					  s32 *temp, s32 *pressure);
 
 	struct ms5611_chip_info *chip_info;
diff --git a/drivers/iio/pressure/ms5611_core.c b/drivers/iio/pressure/ms5611_core.c
index ee75f08655c9..a4d0b54cde9b 100644
--- a/drivers/iio/pressure/ms5611_core.c
+++ b/drivers/iio/pressure/ms5611_core.c
@@ -85,8 +85,7 @@ static int ms5611_read_prom(struct iio_dev *indio_dev)
 	struct ms5611_state *st = iio_priv(indio_dev);
 
 	for (i = 0; i < MS5611_PROM_WORDS_NB; i++) {
-		ret = st->read_prom_word(&indio_dev->dev,
-					 i, &st->chip_info->prom[i]);
+		ret = st->read_prom_word(st, i, &st->chip_info->prom[i]);
 		if (ret < 0) {
 			dev_err(&indio_dev->dev,
 				"failed to read prom at %d\n", i);
@@ -108,7 +107,7 @@ static int ms5611_read_temp_and_pressure(struct iio_dev *indio_dev,
 	int ret;
 	struct ms5611_state *st = iio_priv(indio_dev);
 
-	ret = st->read_adc_temp_and_pressure(&indio_dev->dev, temp, pressure);
+	ret = st->read_adc_temp_and_pressure(st, temp, pressure);
 	if (ret < 0) {
 		dev_err(&indio_dev->dev,
 			"failed to read temperature and pressure\n");
@@ -196,7 +195,7 @@ static int ms5611_reset(struct iio_dev *indio_dev)
 	int ret;
 	struct ms5611_state *st = iio_priv(indio_dev);
 
-	ret = st->reset(&indio_dev->dev);
+	ret = st->reset(st);
 	if (ret < 0) {
 		dev_err(&indio_dev->dev, "failed to reset device\n");
 		return ret;
diff --git a/drivers/iio/pressure/ms5611_i2c.c b/drivers/iio/pressure/ms5611_i2c.c
index 5c82d80f85b6..1047a85527a9 100644
--- a/drivers/iio/pressure/ms5611_i2c.c
+++ b/drivers/iio/pressure/ms5611_i2c.c
@@ -20,17 +20,15 @@
 
 #include "ms5611.h"
 
-static int ms5611_i2c_reset(struct device *dev)
+static int ms5611_i2c_reset(struct ms5611_state *st)
 {
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
-
 	return i2c_smbus_write_byte(st->client, MS5611_RESET);
 }
 
-static int ms5611_i2c_read_prom_word(struct device *dev, int index, u16 *word)
+static int ms5611_i2c_read_prom_word(struct ms5611_state *st, int index,
+				     u16 *word)
 {
 	int ret;
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
 
 	ret = i2c_smbus_read_word_swapped(st->client,
 			MS5611_READ_PROM_WORD + (index << 1));
@@ -57,11 +55,10 @@ static int ms5611_i2c_read_adc(struct ms5611_state *st, s32 *val)
 	return 0;
 }
 
-static int ms5611_i2c_read_adc_temp_and_pressure(struct device *dev,
+static int ms5611_i2c_read_adc_temp_and_pressure(struct ms5611_state *st,
 						 s32 *temp, s32 *pressure)
 {
 	int ret;
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
 	const struct ms5611_osr *osr = st->temp_osr;
 
 	ret = i2c_smbus_write_byte(st->client, osr->cmd);
diff --git a/drivers/iio/pressure/ms5611_spi.c b/drivers/iio/pressure/ms5611_spi.c
index 79bed64c9b68..9fa2dcd71760 100644
--- a/drivers/iio/pressure/ms5611_spi.c
+++ b/drivers/iio/pressure/ms5611_spi.c
@@ -15,18 +15,17 @@
 
 #include "ms5611.h"
 
-static int ms5611_spi_reset(struct device *dev)
+static int ms5611_spi_reset(struct ms5611_state *st)
 {
 	u8 cmd = MS5611_RESET;
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
 
 	return spi_write_then_read(st->client, &cmd, 1, NULL, 0);
 }
 
-static int ms5611_spi_read_prom_word(struct device *dev, int index, u16 *word)
+static int ms5611_spi_read_prom_word(struct ms5611_state *st, int index,
+				     u16 *word)
 {
 	int ret;
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
 
 	ret = spi_w8r16be(st->client, MS5611_READ_PROM_WORD + (index << 1));
 	if (ret < 0)
@@ -37,11 +36,10 @@ static int ms5611_spi_read_prom_word(struct device *dev, int index, u16 *word)
 	return 0;
 }
 
-static int ms5611_spi_read_adc(struct device *dev, s32 *val)
+static int ms5611_spi_read_adc(struct ms5611_state *st, s32 *val)
 {
 	int ret;
 	u8 buf[3] = { MS5611_READ_ADC };
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
 
 	ret = spi_write_then_read(st->client, buf, 1, buf, 3);
 	if (ret < 0)
@@ -52,11 +50,10 @@ static int ms5611_spi_read_adc(struct device *dev, s32 *val)
 	return 0;
 }
 
-static int ms5611_spi_read_adc_temp_and_pressure(struct device *dev,
+static int ms5611_spi_read_adc_temp_and_pressure(struct ms5611_state *st,
 						 s32 *temp, s32 *pressure)
 {
 	int ret;
-	struct ms5611_state *st = iio_priv(dev_to_iio_dev(dev));
 	const struct ms5611_osr *osr = st->temp_osr;
 
 	/*
@@ -68,7 +65,7 @@ static int ms5611_spi_read_adc_temp_and_pressure(struct device *dev,
 		return ret;
 
 	usleep_range(osr->conv_usec, osr->conv_usec + (osr->conv_usec / 10UL));
-	ret = ms5611_spi_read_adc(dev, temp);
+	ret = ms5611_spi_read_adc(st, temp);
 	if (ret < 0)
 		return ret;
 
@@ -78,7 +75,7 @@ static int ms5611_spi_read_adc_temp_and_pressure(struct device *dev,
 		return ret;
 
 	usleep_range(osr->conv_usec, osr->conv_usec + (osr->conv_usec / 10UL));
-	return ms5611_spi_read_adc(dev, pressure);
+	return ms5611_spi_read_adc(st, pressure);
 }
 
 static int ms5611_spi_probe(struct spi_device *spi)
-- 
2.35.3

