[PATCH v2 0/3] adt7316 regmap implementation

[PATCH v2 0/3] adt7316 regmap implementation

[Shreeya Patel]

This patchset consist of some initial patches for heading
towards the regmap implementation and also the final patch
which enables the driver to use regmap API thus removing
the redundant and common code.

Shreeya Patel (3):
  Staging: iio: adt7316: Remove irq from bus structure
  Staging: iio: adt7316: Remove multi read and write functions
  Staging: iio: adt7316: Add regmap support

 drivers/staging/iio/addac/adt7316-i2c.c | 101 ++--------------
 drivers/staging/iio/addac/adt7316-spi.c |  95 +++------------
 drivers/staging/iio/addac/adt7316.c     | 147 ++++++++++++------------
 drivers/staging/iio/addac/adt7316.h     |  15 +--
 4 files changed, 103 insertions(+), 255 deletions(-)

-- 
2.17.1

[PATCH v2 1/3] Staging: iio: adt7316: Remove irq from bus structure

[Shreeya Patel]

interrupt request is not needed to be present in the bus
structure. It is a good option to pass it as a parameter
in the probe function instead of having it in the bus structure.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
---
 drivers/staging/iio/addac/adt7316-i2c.c |  3 +--
 drivers/staging/iio/addac/adt7316-spi.c |  4 ++--
 drivers/staging/iio/addac/adt7316.c     | 15 +++++++--------
 drivers/staging/iio/addac/adt7316.h     |  3 +--
 4 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
index ac91163656b5..335c17731cf7 100644
--- a/drivers/staging/iio/addac/adt7316-i2c.c
+++ b/drivers/staging/iio/addac/adt7316-i2c.c
@@ -103,14 +103,13 @@ static int adt7316_i2c_probe(struct i2c_client *client,
 {
 	struct adt7316_bus bus = {
 		.client = client,
-		.irq = client->irq,
 		.read = adt7316_i2c_read,
 		.write = adt7316_i2c_write,
 		.multi_read = adt7316_i2c_multi_read,
 		.multi_write = adt7316_i2c_multi_write,
 	};
 
-	return adt7316_probe(&client->dev, &bus, id->name);
+	return adt7316_probe(&client->dev, &bus, id->name, client->irq);
 }
 
 static const struct i2c_device_id adt7316_i2c_id[] = {
diff --git a/drivers/staging/iio/addac/adt7316-spi.c b/drivers/staging/iio/addac/adt7316-spi.c
index e75827e326a6..adaaa3eecd04 100644
--- a/drivers/staging/iio/addac/adt7316-spi.c
+++ b/drivers/staging/iio/addac/adt7316-spi.c
@@ -93,7 +93,6 @@ static int adt7316_spi_probe(struct spi_device *spi_dev)
 {
 	struct adt7316_bus bus = {
 		.client = spi_dev,
-		.irq = spi_dev->irq,
 		.read = adt7316_spi_read,
 		.write = adt7316_spi_write,
 		.multi_read = adt7316_spi_multi_read,
@@ -112,7 +111,8 @@ static int adt7316_spi_probe(struct spi_device *spi_dev)
 	adt7316_spi_write(spi_dev, 0, 0);
 	adt7316_spi_write(spi_dev, 0, 0);
 
-	return adt7316_probe(&spi_dev->dev, &bus, spi_dev->modalias);
+	return adt7316_probe(&spi_dev->dev, &bus, spi_dev->modalias,
+			     spi_dev->irq);
 }
 
 static const struct spi_device_id adt7316_spi_id[] = {
diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index 1ca4ee0f30ee..6b4b80fd80cc 100644
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -1807,12 +1807,12 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 	return IRQ_HANDLED;
 }
 
-static int adt7316_setup_irq(struct iio_dev *indio_dev)
+static int adt7316_setup_irq(struct iio_dev *indio_dev, int irq)
 {
 	struct adt7316_chip_info *chip = iio_priv(indio_dev);
 	int irq_type, ret;
 
-	irq_type = irqd_get_trigger_type(irq_get_irq_data(chip->bus.irq));
+	irq_type = irqd_get_trigger_type(irq_get_irq_data(irq));
 
 	switch (irq_type) {
 	case IRQF_TRIGGER_HIGH:
@@ -1828,13 +1828,12 @@ static int adt7316_setup_irq(struct iio_dev *indio_dev)
 		break;
 	}
 
-	ret = devm_request_threaded_irq(&indio_dev->dev, chip->bus.irq,
+	ret = devm_request_threaded_irq(&indio_dev->dev, irq,
 					NULL, adt7316_event_handler,
 					irq_type | IRQF_ONESHOT,
 					indio_dev->name, indio_dev);
 	if (ret) {
-		dev_err(&indio_dev->dev, "failed to request irq %d\n",
-			chip->bus.irq);
+		dev_err(&indio_dev->dev, "failed to request irq %d\n", irq);
 		return ret;
 	}
 
@@ -2134,7 +2133,7 @@ static const struct iio_info adt7516_info = {
  * device probe and remove
  */
 int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
-		const char *name)
+		  const char *name, int irq)
 {
 	struct adt7316_chip_info *chip;
 	struct iio_dev *indio_dev;
@@ -2180,8 +2179,8 @@ int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 	indio_dev->name = name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
-	if (chip->bus.irq > 0) {
-		ret = adt7316_setup_irq(indio_dev);
+	if (irq > 0) {
+		ret = adt7316_setup_irq(indio_dev, irq);
 		if (ret)
 			return ret;
 	}
diff --git a/drivers/staging/iio/addac/adt7316.h b/drivers/staging/iio/addac/adt7316.h
index fd7c5c92b599..03d5300a98cd 100644
--- a/drivers/staging/iio/addac/adt7316.h
+++ b/drivers/staging/iio/addac/adt7316.h
@@ -16,7 +16,6 @@
 
 struct adt7316_bus {
 	void *client;
-	int irq;
 	int (*read)(void *client, u8 reg, u8 *data);
 	int (*write)(void *client, u8 reg, u8 val);
 	int (*multi_read)(void *client, u8 first_reg, u8 count, u8 *data);
@@ -30,6 +29,6 @@ extern const struct dev_pm_ops adt7316_pm_ops;
 #define ADT7316_PM_OPS NULL
 #endif
 int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
-		   const char *name);
+		  const char *name, int irq);
 
 #endif
-- 
2.17.1

Re: [PATCH v2 1/3] Staging: iio: adt7316: Remove irq from bus structure

[Jonathan Cameron]

On Sun, 20 Jan 2019 00:09:30 +0530
Shreeya Patel <shreeya.patel23498@gmail.com> wrote:

> interrupt request is not needed to be present in the bus
> structure. It is a good option to pass it as a parameter
> in the probe function instead of having it in the bus structure.
> 
> Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
Hi Shreeya,

I just tried applying this to the current testing branch of
iio.git and unfortunately it doesn't apply. Please rebase
on that as there have been various changes.

Superficially I think it is all white space related and a bit
of code movement, but I'd rather you made sure the rebase
worked well than I made assumptions!

The change looks good otherwise.

Jonathan

> ---
>  drivers/staging/iio/addac/adt7316-i2c.c |  3 +--
>  drivers/staging/iio/addac/adt7316-spi.c |  4 ++--
>  drivers/staging/iio/addac/adt7316.c     | 15 +++++++--------
>  drivers/staging/iio/addac/adt7316.h     |  3 +--
>  4 files changed, 11 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
> index ac91163656b5..335c17731cf7 100644
> --- a/drivers/staging/iio/addac/adt7316-i2c.c
> +++ b/drivers/staging/iio/addac/adt7316-i2c.c
> @@ -103,14 +103,13 @@ static int adt7316_i2c_probe(struct i2c_client *client,
>  {
>  	struct adt7316_bus bus = {
>  		.client = client,
> -		.irq = client->irq,
>  		.read = adt7316_i2c_read,
>  		.write = adt7316_i2c_write,
>  		.multi_read = adt7316_i2c_multi_read,
>  		.multi_write = adt7316_i2c_multi_write,
>  	};
>  
> -	return adt7316_probe(&client->dev, &bus, id->name);
> +	return adt7316_probe(&client->dev, &bus, id->name, client->irq);
>  }
>  
>  static const struct i2c_device_id adt7316_i2c_id[] = {
> diff --git a/drivers/staging/iio/addac/adt7316-spi.c b/drivers/staging/iio/addac/adt7316-spi.c
> index e75827e326a6..adaaa3eecd04 100644
> --- a/drivers/staging/iio/addac/adt7316-spi.c
> +++ b/drivers/staging/iio/addac/adt7316-spi.c
> @@ -93,7 +93,6 @@ static int adt7316_spi_probe(struct spi_device *spi_dev)
>  {
>  	struct adt7316_bus bus = {
>  		.client = spi_dev,
> -		.irq = spi_dev->irq,
>  		.read = adt7316_spi_read,
>  		.write = adt7316_spi_write,
>  		.multi_read = adt7316_spi_multi_read,
> @@ -112,7 +111,8 @@ static int adt7316_spi_probe(struct spi_device *spi_dev)
>  	adt7316_spi_write(spi_dev, 0, 0);
>  	adt7316_spi_write(spi_dev, 0, 0);
>  
> -	return adt7316_probe(&spi_dev->dev, &bus, spi_dev->modalias);
> +	return adt7316_probe(&spi_dev->dev, &bus, spi_dev->modalias,
> +			     spi_dev->irq);
>  }
>  
>  static const struct spi_device_id adt7316_spi_id[] = {
> diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
> index 1ca4ee0f30ee..6b4b80fd80cc 100644
> --- a/drivers/staging/iio/addac/adt7316.c
> +++ b/drivers/staging/iio/addac/adt7316.c
> @@ -1807,12 +1807,12 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
>  	return IRQ_HANDLED;
>  }
>  
> -static int adt7316_setup_irq(struct iio_dev *indio_dev)
> +static int adt7316_setup_irq(struct iio_dev *indio_dev, int irq)
>  {
>  	struct adt7316_chip_info *chip = iio_priv(indio_dev);
>  	int irq_type, ret;
>  
> -	irq_type = irqd_get_trigger_type(irq_get_irq_data(chip->bus.irq));
> +	irq_type = irqd_get_trigger_type(irq_get_irq_data(irq));
>  
>  	switch (irq_type) {
>  	case IRQF_TRIGGER_HIGH:
> @@ -1828,13 +1828,12 @@ static int adt7316_setup_irq(struct iio_dev *indio_dev)
>  		break;
>  	}
>  
> -	ret = devm_request_threaded_irq(&indio_dev->dev, chip->bus.irq,
> +	ret = devm_request_threaded_irq(&indio_dev->dev, irq,
>  					NULL, adt7316_event_handler,
>  					irq_type | IRQF_ONESHOT,
>  					indio_dev->name, indio_dev);
>  	if (ret) {
> -		dev_err(&indio_dev->dev, "failed to request irq %d\n",
> -			chip->bus.irq);
> +		dev_err(&indio_dev->dev, "failed to request irq %d\n", irq);
>  		return ret;
>  	}
>  
> @@ -2134,7 +2133,7 @@ static const struct iio_info adt7516_info = {
>   * device probe and remove
>   */
>  int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
> -		const char *name)
> +		  const char *name, int irq)
>  {
>  	struct adt7316_chip_info *chip;
>  	struct iio_dev *indio_dev;
> @@ -2180,8 +2179,8 @@ int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
>  	indio_dev->name = name;
>  	indio_dev->modes = INDIO_DIRECT_MODE;
>  
> -	if (chip->bus.irq > 0) {
> -		ret = adt7316_setup_irq(indio_dev);
> +	if (irq > 0) {
> +		ret = adt7316_setup_irq(indio_dev, irq);
>  		if (ret)
>  			return ret;
>  	}
> diff --git a/drivers/staging/iio/addac/adt7316.h b/drivers/staging/iio/addac/adt7316.h
> index fd7c5c92b599..03d5300a98cd 100644
> --- a/drivers/staging/iio/addac/adt7316.h
> +++ b/drivers/staging/iio/addac/adt7316.h
> @@ -16,7 +16,6 @@
>  
>  struct adt7316_bus {
>  	void *client;
> -	int irq;
>  	int (*read)(void *client, u8 reg, u8 *data);
>  	int (*write)(void *client, u8 reg, u8 val);
>  	int (*multi_read)(void *client, u8 first_reg, u8 count, u8 *data);
> @@ -30,6 +29,6 @@ extern const struct dev_pm_ops adt7316_pm_ops;
>  #define ADT7316_PM_OPS NULL
>  #endif
>  int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
> -		   const char *name);
> +		  const char *name, int irq);
>  
>  #endif

[PATCH v2 2/3] Staging: iio: adt7316: Remove multi read and write functions

[Shreeya Patel]

Currently, adt7316 doesn't use multi read and multi write
functions hence remove the redundant code and make the
necessary changes in the code.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
---
 drivers/staging/iio/addac/adt7316-i2c.c | 40 -------------------------
 drivers/staging/iio/addac/adt7316-spi.c | 31 ++++---------------
 drivers/staging/iio/addac/adt7316.h     |  2 --
 3 files changed, 6 insertions(+), 67 deletions(-)

diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
index 335c17731cf7..40aa9e2f1966 100644
--- a/drivers/staging/iio/addac/adt7316-i2c.c
+++ b/drivers/staging/iio/addac/adt7316-i2c.c
@@ -56,44 +56,6 @@ static int adt7316_i2c_write(void *client, u8 reg, u8 data)
 	return ret;
 }
 
-static int adt7316_i2c_multi_read(void *client, u8 reg, u8 count, u8 *data)
-{
-	struct i2c_client *cl = client;
-	int i, ret = 0;
-
-	if (count > ADT7316_REG_MAX_ADDR)
-		count = ADT7316_REG_MAX_ADDR;
-
-	for (i = 0; i < count; i++) {
-		ret = adt7316_i2c_read(cl, reg, &data[i]);
-		if (ret < 0) {
-			dev_err(&cl->dev, "I2C multi read error\n");
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
-static int adt7316_i2c_multi_write(void *client, u8 reg, u8 count, u8 *data)
-{
-	struct i2c_client *cl = client;
-	int i, ret = 0;
-
-	if (count > ADT7316_REG_MAX_ADDR)
-		count = ADT7316_REG_MAX_ADDR;
-
-	for (i = 0; i < count; i++) {
-		ret = adt7316_i2c_write(cl, reg, data[i]);
-		if (ret < 0) {
-			dev_err(&cl->dev, "I2C multi write error\n");
-			return ret;
-		}
-	}
-
-	return 0;
-}
-
 /*
  * device probe and remove
  */
@@ -105,8 +67,6 @@ static int adt7316_i2c_probe(struct i2c_client *client,
 		.client = client,
 		.read = adt7316_i2c_read,
 		.write = adt7316_i2c_write,
-		.multi_read = adt7316_i2c_multi_read,
-		.multi_write = adt7316_i2c_multi_write,
 	};
 
 	return adt7316_probe(&client->dev, &bus, id->name, client->irq);
diff --git a/drivers/staging/iio/addac/adt7316-spi.c b/drivers/staging/iio/addac/adt7316-spi.c
index adaaa3eecd04..1a78dc1e2840 100644
--- a/drivers/staging/iio/addac/adt7316-spi.c
+++ b/drivers/staging/iio/addac/adt7316-spi.c
@@ -23,15 +23,12 @@
  * adt7316 register access by SPI
  */
 
-static int adt7316_spi_multi_read(void *client, u8 reg, u8 count, u8 *data)
+static int adt7316_spi_read(void *client, u8 reg, u8 *data)
 {
 	struct spi_device *spi_dev = client;
 	u8 cmd[2];
 	int ret = 0;
 
-	if (count > ADT7316_REG_MAX_ADDR)
-		count = ADT7316_REG_MAX_ADDR;
-
 	cmd[0] = ADT7316_SPI_CMD_WRITE;
 	cmd[1] = reg;
 
@@ -43,7 +40,7 @@ static int adt7316_spi_multi_read(void *client, u8 reg, u8 count, u8 *data)
 
 	cmd[0] = ADT7316_SPI_CMD_READ;
 
-	ret = spi_write_then_read(spi_dev, cmd, 1, data, count);
+	ret = spi_write_then_read(spi_dev, cmd, 1, data, 1);
 	if (ret < 0) {
 		dev_err(&spi_dev->dev, "SPI read data error\n");
 		return ret;
@@ -52,21 +49,17 @@ static int adt7316_spi_multi_read(void *client, u8 reg, u8 count, u8 *data)
 	return 0;
 }
 
-static int adt7316_spi_multi_write(void *client, u8 reg, u8 count, u8 *data)
+static int adt7316_spi_write(void *client, u8 reg, u8 val)
 {
 	struct spi_device *spi_dev = client;
 	u8 buf[ADT7316_REG_MAX_ADDR + 2];
-	int i, ret = 0;
-
-	if (count > ADT7316_REG_MAX_ADDR)
-		count = ADT7316_REG_MAX_ADDR;
+	int ret = 0;
 
 	buf[0] = ADT7316_SPI_CMD_WRITE;
 	buf[1] = reg;
-	for (i = 0; i < count; i++)
-		buf[i + 2] = data[i];
+	buf[2] = val;
 
-	ret = spi_write(spi_dev, buf, count + 2);
+	ret = spi_write(spi_dev, buf, 3);
 	if (ret < 0) {
 		dev_err(&spi_dev->dev, "SPI write error\n");
 		return ret;
@@ -75,16 +68,6 @@ static int adt7316_spi_multi_write(void *client, u8 reg, u8 count, u8 *data)
 	return ret;
 }
 
-static int adt7316_spi_read(void *client, u8 reg, u8 *data)
-{
-	return adt7316_spi_multi_read(client, reg, 1, data);
-}
-
-static int adt7316_spi_write(void *client, u8 reg, u8 val)
-{
-	return adt7316_spi_multi_write(client, reg, 1, &val);
-}
-
 /*
  * device probe and remove
  */
@@ -95,8 +78,6 @@ static int adt7316_spi_probe(struct spi_device *spi_dev)
 		.client = spi_dev,
 		.read = adt7316_spi_read,
 		.write = adt7316_spi_write,
-		.multi_read = adt7316_spi_multi_read,
-		.multi_write = adt7316_spi_multi_write,
 	};
 
 	/* don't exceed max specified SPI CLK frequency */
diff --git a/drivers/staging/iio/addac/adt7316.h b/drivers/staging/iio/addac/adt7316.h
index 03d5300a98cd..e9f288420234 100644
--- a/drivers/staging/iio/addac/adt7316.h
+++ b/drivers/staging/iio/addac/adt7316.h
@@ -18,8 +18,6 @@ struct adt7316_bus {
 	void *client;
 	int (*read)(void *client, u8 reg, u8 *data);
 	int (*write)(void *client, u8 reg, u8 val);
-	int (*multi_read)(void *client, u8 first_reg, u8 count, u8 *data);
-	int (*multi_write)(void *client, u8 first_reg, u8 count, u8 *data);
 };
 
 #ifdef CONFIG_PM_SLEEP
-- 
2.17.1

[PATCH v2 3/3] Staging: iio: adt7316: Add regmap support

[Shreeya Patel]

Both i2c and spi drivers have functions for reading and writing
to/from registers. Remove this redundant and common code by using
regmap API.

Signed-off-by: Shreeya Patel <shreeya.patel23498@gmail.com>
---
 drivers/staging/iio/addac/adt7316-i2c.c |  60 +++--------
 drivers/staging/iio/addac/adt7316-spi.c |  74 +++----------
 drivers/staging/iio/addac/adt7316.c     | 132 ++++++++++++------------
 drivers/staging/iio/addac/adt7316.h     |  10 +-
 4 files changed, 94 insertions(+), 182 deletions(-)

diff --git a/drivers/staging/iio/addac/adt7316-i2c.c b/drivers/staging/iio/addac/adt7316-i2c.c
index 40aa9e2f1966..435b65845174 100644
--- a/drivers/staging/iio/addac/adt7316-i2c.c
+++ b/drivers/staging/iio/addac/adt7316-i2c.c
@@ -12,64 +12,28 @@
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
+#include <linux/regmap.h>
 
 #include "adt7316.h"
 
-/*
- * adt7316 register access by I2C
- */
-static int adt7316_i2c_read(void *client, u8 reg, u8 *data)
-{
-	struct i2c_client *cl = client;
-	int ret;
-
-	ret = i2c_smbus_write_byte(cl, reg);
-	if (ret < 0) {
-		dev_err(&cl->dev, "I2C fail to select reg\n");
-		return ret;
-	}
-
-	ret = i2c_smbus_read_byte(client);
-
-	if (!ret)
-		return -EIO;
-
-	if (ret < 0) {
-		dev_err(&cl->dev, "I2C read error\n");
-		return ret;
-	}
-
-	*data = ret;
-
-	return 0;
-}
-
-static int adt7316_i2c_write(void *client, u8 reg, u8 data)
-{
-	struct i2c_client *cl = client;
-	int ret = 0;
-
-	ret = i2c_smbus_write_byte_data(cl, reg, data);
-	if (ret < 0)
-		dev_err(&cl->dev, "I2C write error\n");
-
-	return ret;
-}
-
 /*
  * device probe and remove
  */
-
 static int adt7316_i2c_probe(struct i2c_client *client,
 			     const struct i2c_device_id *id)
 {
-	struct adt7316_bus bus = {
-		.client = client,
-		.read = adt7316_i2c_read,
-		.write = adt7316_i2c_write,
-	};
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_i2c(client, &adt7316_regmap_config);
+
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Error initializing i2c regmap: %ld\n",
+			PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
 
-	return adt7316_probe(&client->dev, &bus, id->name, client->irq);
+	return adt7316_probe(&client->dev, regmap, id ? id->name : NULL,
+			     client->irq);
 }
 
 static const struct i2c_device_id adt7316_i2c_id[] = {
diff --git a/drivers/staging/iio/addac/adt7316-spi.c b/drivers/staging/iio/addac/adt7316-spi.c
index 1a78dc1e2840..203b5c3ada6e 100644
--- a/drivers/staging/iio/addac/adt7316-spi.c
+++ b/drivers/staging/iio/addac/adt7316-spi.c
@@ -11,74 +11,19 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
+#include <linux/regmap.h>
 #include <linux/spi/spi.h>
 
 #include "adt7316.h"
 
 #define ADT7316_SPI_MAX_FREQ_HZ		5000000
-#define ADT7316_SPI_CMD_READ		0x91
-#define ADT7316_SPI_CMD_WRITE		0x90
-
-/*
- * adt7316 register access by SPI
- */
-
-static int adt7316_spi_read(void *client, u8 reg, u8 *data)
-{
-	struct spi_device *spi_dev = client;
-	u8 cmd[2];
-	int ret = 0;
-
-	cmd[0] = ADT7316_SPI_CMD_WRITE;
-	cmd[1] = reg;
-
-	ret = spi_write(spi_dev, cmd, 2);
-	if (ret < 0) {
-		dev_err(&spi_dev->dev, "SPI fail to select reg\n");
-		return ret;
-	}
-
-	cmd[0] = ADT7316_SPI_CMD_READ;
-
-	ret = spi_write_then_read(spi_dev, cmd, 1, data, 1);
-	if (ret < 0) {
-		dev_err(&spi_dev->dev, "SPI read data error\n");
-		return ret;
-	}
-
-	return 0;
-}
-
-static int adt7316_spi_write(void *client, u8 reg, u8 val)
-{
-	struct spi_device *spi_dev = client;
-	u8 buf[ADT7316_REG_MAX_ADDR + 2];
-	int ret = 0;
-
-	buf[0] = ADT7316_SPI_CMD_WRITE;
-	buf[1] = reg;
-	buf[2] = val;
-
-	ret = spi_write(spi_dev, buf, 3);
-	if (ret < 0) {
-		dev_err(&spi_dev->dev, "SPI write error\n");
-		return ret;
-	}
-
-	return ret;
-}
 
 /*
  * device probe and remove
  */
-
 static int adt7316_spi_probe(struct spi_device *spi_dev)
 {
-	struct adt7316_bus bus = {
-		.client = spi_dev,
-		.read = adt7316_spi_read,
-		.write = adt7316_spi_write,
-	};
+	struct regmap *regmap;
 
 	/* don't exceed max specified SPI CLK frequency */
 	if (spi_dev->max_speed_hz > ADT7316_SPI_MAX_FREQ_HZ) {
@@ -87,12 +32,19 @@ static int adt7316_spi_probe(struct spi_device *spi_dev)
 		return -EINVAL;
 	}
 
+	regmap = devm_regmap_init_spi(spi_dev, &adt7316_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&spi_dev->dev, "Error initializing spi regmap: %ld\n",
+			PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
 	/* switch from default I2C protocol to SPI protocol */
-	adt7316_spi_write(spi_dev, 0, 0);
-	adt7316_spi_write(spi_dev, 0, 0);
-	adt7316_spi_write(spi_dev, 0, 0);
+	regmap_write(regmap, 0, 0);
+	regmap_write(regmap, 0, 0);
+	regmap_write(regmap, 0, 0);
 
-	return adt7316_probe(&spi_dev->dev, &bus, spi_dev->modalias,
+	return adt7316_probe(&spi_dev->dev, regmap, spi_dev->modalias,
 			     spi_dev->irq);
 }
 
diff --git a/drivers/staging/iio/addac/adt7316.c b/drivers/staging/iio/addac/adt7316.c
index 6b4b80fd80cc..301920f64a57 100644
--- a/drivers/staging/iio/addac/adt7316.c
+++ b/drivers/staging/iio/addac/adt7316.c
@@ -17,6 +17,7 @@
 #include <linux/list.h>
 #include <linux/i2c.h>
 #include <linux/rtc.h>
+#include <linux/regmap.h>
 #include <linux/module.h>
 
 #include <linux/iio/iio.h>
@@ -176,7 +177,7 @@
  */
 
 struct adt7316_chip_info {
-	struct adt7316_bus	bus;
+	struct regmap *regmap;
 	struct gpio_desc	*ldac_pin;
 	u16			int_mask;	/* 0x2f */
 	u8			config1;
@@ -237,7 +238,7 @@ static ssize_t _adt7316_store_enabled(struct adt7316_chip_info *chip,
 	else
 		config1 = chip->config1 & ~ADT7316_EN;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG1, config1);
 	if (ret)
 		return -EIO;
 
@@ -301,7 +302,7 @@ static ssize_t adt7316_store_select_ex_temp(struct device *dev,
 	if (buf[0] == '1')
 		config1 |= ADT7516_SEL_EX_TEMP;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG1, config1);
 	if (ret)
 		return -EIO;
 
@@ -342,7 +343,7 @@ static ssize_t adt7316_store_mode(struct device *dev,
 	if (!memcmp(buf, "single_channel", 14))
 		config2 |= ADT7316_AD_SINGLE_CH_MODE;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG2, config2);
 	if (ret)
 		return -EIO;
 
@@ -435,7 +436,7 @@ static ssize_t adt7316_store_ad_channel(struct device *dev,
 
 	config2 |= data;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG2, config2);
 	if (ret)
 		return -EIO;
 
@@ -495,7 +496,7 @@ static ssize_t adt7316_store_disable_averaging(struct device *dev,
 	if (buf[0] == '1')
 		config2 |= ADT7316_DISABLE_AVERAGING;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG2, config2);
 	if (ret)
 		return -EIO;
 
@@ -534,7 +535,7 @@ static ssize_t adt7316_store_enable_smbus_timeout(struct device *dev,
 	if (buf[0] == '1')
 		config2 |= ADT7316_EN_SMBUS_TIMEOUT;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG2, config2);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG2, config2);
 	if (ret)
 		return -EIO;
 
@@ -572,7 +573,7 @@ static ssize_t adt7316_store_powerdown(struct device *dev,
 	if (buf[0] == '1')
 		config1 |= ADT7316_PD;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG1, config1);
 	if (ret)
 		return -EIO;
 
@@ -610,7 +611,7 @@ static ssize_t adt7316_store_fast_ad_clock(struct device *dev,
 	if (buf[0] == '1')
 		config3 |= ADT7316_ADCLK_22_5;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG3, config3);
 	if (ret)
 		return -EIO;
 
@@ -663,7 +664,7 @@ static ssize_t adt7316_store_da_high_resolution(struct device *dev,
 		config3 = chip->config3 & (~ADT7316_DA_HIGH_RESOLUTION);
 	}
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG3, config3);
 	if (ret)
 		return -EIO;
 
@@ -709,7 +710,7 @@ static ssize_t adt7316_store_AIN_internal_Vref(struct device *dev,
 	else
 		config3 = chip->config3 | ADT7516_AIN_IN_VREF;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG3, config3);
 	if (ret)
 		return -EIO;
 
@@ -748,7 +749,7 @@ static ssize_t adt7316_store_enable_prop_DACA(struct device *dev,
 	if (buf[0] == '1')
 		config3 |= ADT7316_EN_IN_TEMP_PROP_DACA;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG3, config3);
 	if (ret)
 		return -EIO;
 
@@ -787,7 +788,7 @@ static ssize_t adt7316_store_enable_prop_DACB(struct device *dev,
 	if (buf[0] == '1')
 		config3 |= ADT7316_EN_EX_TEMP_PROP_DACB;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, config3);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG3, config3);
 	if (ret)
 		return -EIO;
 
@@ -830,7 +831,7 @@ static ssize_t adt7316_store_DAC_2Vref_ch_mask(struct device *dev,
 	dac_config = chip->dac_config & (~ADT7316_DA_2VREF_CH_MASK);
 	dac_config |= data;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
+	ret = regmap_write(chip->regmap, ADT7316_DAC_CONFIG, dac_config);
 	if (ret)
 		return -EIO;
 
@@ -890,7 +891,7 @@ static ssize_t adt7316_store_DAC_update_mode(struct device *dev,
 	dac_config = chip->dac_config & (~ADT7316_DA_EN_MODE_MASK);
 	dac_config |= data;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
+	ret = regmap_write(chip->regmap, ADT7316_DAC_CONFIG, dac_config);
 	if (ret)
 		return -EIO;
 
@@ -945,8 +946,8 @@ static ssize_t adt7316_store_update_DAC(struct device *dev,
 		ldac_config = chip->ldac_config & (~ADT7316_LDAC_EN_DA_MASK);
 		ldac_config |= data;
 
-		ret = chip->bus.write(chip->bus.client, ADT7316_LDAC_CONFIG,
-			ldac_config);
+		ret = regmap_write(chip->regmap, ADT7316_LDAC_CONFIG,
+				   ldac_config);
 		if (ret)
 			return -EIO;
 	} else {
@@ -993,7 +994,7 @@ static ssize_t adt7316_store_DA_AB_Vref_bypass(struct device *dev,
 	if (buf[0] == '1')
 		dac_config |= ADT7316_VREF_BYPASS_DAC_AB;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
+	ret = regmap_write(chip->regmap, ADT7316_DAC_CONFIG, dac_config);
 	if (ret)
 		return -EIO;
 
@@ -1038,7 +1039,7 @@ static ssize_t adt7316_store_DA_CD_Vref_bypass(struct device *dev,
 	if (buf[0] == '1')
 		dac_config |= ADT7316_VREF_BYPASS_DAC_CD;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_DAC_CONFIG, dac_config);
+	ret = regmap_write(chip->regmap, ADT7316_DAC_CONFIG, dac_config);
 	if (ret)
 		return -EIO;
 
@@ -1098,8 +1099,7 @@ static ssize_t adt7316_store_DAC_internal_Vref(struct device *dev,
 			ldac_config = chip->ldac_config | ADT7316_DAC_IN_VREF;
 	}
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_LDAC_CONFIG,
-			ldac_config);
+	ret = regmap_write(chip->regmap, ADT7316_LDAC_CONFIG, ldac_config);
 	if (ret)
 		return -EIO;
 
@@ -1117,7 +1117,7 @@ static ssize_t adt7316_show_ad(struct adt7316_chip_info *chip,
 		int channel, char *buf)
 {
 	u16 data;
-	u8 msb, lsb;
+	unsigned int msb, lsb;
 	char sign = ' ';
 	int ret;
 
@@ -1127,13 +1127,12 @@ static ssize_t adt7316_show_ad(struct adt7316_chip_info *chip,
 
 	switch (channel) {
 	case ADT7316_AD_SINGLE_CH_IN:
-		ret = chip->bus.read(chip->bus.client,
-			ADT7316_LSB_IN_TEMP_VDD, &lsb);
+		ret = regmap_read(chip->regmap, ADT7316_LSB_IN_TEMP_VDD, &lsb);
 		if (ret)
 			return -EIO;
 
-		ret = chip->bus.read(chip->bus.client,
-			ADT7316_AD_MSB_DATA_BASE + channel, &msb);
+		ret = regmap_read(chip->regmap,
+				  ADT7316_AD_MSB_DATA_BASE + channel, &msb);
 		if (ret)
 			return -EIO;
 
@@ -1141,14 +1140,12 @@ static ssize_t adt7316_show_ad(struct adt7316_chip_info *chip,
 		data |= lsb & ADT7316_LSB_IN_TEMP_MASK;
 		break;
 	case ADT7316_AD_SINGLE_CH_VDD:
-		ret = chip->bus.read(chip->bus.client,
-			ADT7316_LSB_IN_TEMP_VDD, &lsb);
+		ret = regmap_read(chip->regmap, ADT7316_LSB_IN_TEMP_VDD, &lsb);
 		if (ret)
 			return -EIO;
 
-		ret = chip->bus.read(chip->bus.client,
-
-			ADT7316_AD_MSB_DATA_BASE + channel, &msb);
+		ret = regmap_read(chip->regmap,
+				  ADT7316_AD_MSB_DATA_BASE + channel, &msb);
 		if (ret)
 			return -EIO;
 
@@ -1156,13 +1153,12 @@ static ssize_t adt7316_show_ad(struct adt7316_chip_info *chip,
 		data |= (lsb & ADT7316_LSB_VDD_MASK) >> ADT7316_LSB_VDD_OFFSET;
 		return sprintf(buf, "%d\n", data);
 	default: /* ex_temp and ain */
-		ret = chip->bus.read(chip->bus.client,
-			ADT7316_LSB_EX_TEMP_AIN, &lsb);
+		ret = regmap_read(chip->regmap, ADT7316_LSB_EX_TEMP_AIN, &lsb);
 		if (ret)
 			return -EIO;
 
-		ret = chip->bus.read(chip->bus.client,
-			ADT7316_AD_MSB_DATA_BASE + channel, &msb);
+		ret = regmap_read(chip->regmap,
+				  ADT7316_AD_MSB_DATA_BASE + channel, &msb);
 		if (ret)
 			return -EIO;
 
@@ -1262,10 +1258,10 @@ static ssize_t adt7316_show_temp_offset(struct adt7316_chip_info *chip,
 		int offset_addr, char *buf)
 {
 	int data;
-	u8 val;
+	unsigned int val;
 	int ret;
 
-	ret = chip->bus.read(chip->bus.client, offset_addr, &val);
+	ret = regmap_read(chip->regmap, offset_addr, &val);
 	if (ret)
 		return -EIO;
 
@@ -1292,7 +1288,7 @@ static ssize_t adt7316_store_temp_offset(struct adt7316_chip_info *chip,
 
 	val = (u8)data;
 
-	ret = chip->bus.write(chip->bus.client, offset_addr, val);
+	ret = regmap_write(chip->regmap, offset_addr, val);
 	if (ret)
 		return -EIO;
 
@@ -1409,7 +1405,7 @@ static ssize_t adt7316_show_DAC(struct adt7316_chip_info *chip,
 		int channel, char *buf)
 {
 	u16 data;
-	u8 msb, lsb, offset;
+	unsigned int msb, lsb, offset;
 	int ret;
 
 	if (channel >= ADT7316_DA_MSB_DATA_REGS ||
@@ -1422,14 +1418,14 @@ static ssize_t adt7316_show_DAC(struct adt7316_chip_info *chip,
 	offset = chip->dac_bits - 8;
 
 	if (chip->dac_bits > 8) {
-		ret = chip->bus.read(chip->bus.client,
-			ADT7316_DA_DATA_BASE + channel * 2, &lsb);
+		ret = regmap_read(chip->regmap,
+				  ADT7316_DA_DATA_BASE + channel * 2, &lsb);
 		if (ret)
 			return -EIO;
 	}
 
-	ret = chip->bus.read(chip->bus.client,
-		ADT7316_DA_DATA_BASE + 1 + channel * 2, &msb);
+	ret = regmap_read(chip->regmap, ADT7316_DA_DATA_BASE + 1 + channel * 2,
+			  &msb);
 	if (ret)
 		return -EIO;
 
@@ -1460,15 +1456,15 @@ static ssize_t adt7316_store_DAC(struct adt7316_chip_info *chip,
 
 	if (chip->dac_bits > 8) {
 		lsb = data & (1 << offset);
-		ret = chip->bus.write(chip->bus.client,
-			ADT7316_DA_DATA_BASE + channel * 2, lsb);
+		ret = regmap_write(chip->regmap,
+				   ADT7316_DA_DATA_BASE + channel * 2, lsb);
 		if (ret)
 			return -EIO;
 	}
 
 	msb = data >> offset;
-	ret = chip->bus.write(chip->bus.client,
-		ADT7316_DA_DATA_BASE + 1 + channel * 2, msb);
+	ret = regmap_write(chip->regmap, ADT7316_DA_DATA_BASE + 1 + channel * 2,
+			   msb);
 	if (ret)
 		return -EIO;
 
@@ -1577,10 +1573,10 @@ static ssize_t adt7316_show_device_id(struct device *dev,
 {
 	struct iio_dev *dev_info = dev_to_iio_dev(dev);
 	struct adt7316_chip_info *chip = iio_priv(dev_info);
-	u8 id;
+	unsigned int id;
 	int ret;
 
-	ret = chip->bus.read(chip->bus.client, ADT7316_DEVICE_ID, &id);
+	ret = regmap_read(chip->regmap, ADT7316_DEVICE_ID, &id);
 	if (ret)
 		return -EIO;
 
@@ -1595,10 +1591,10 @@ static ssize_t adt7316_show_manufactorer_id(struct device *dev,
 {
 	struct iio_dev *dev_info = dev_to_iio_dev(dev);
 	struct adt7316_chip_info *chip = iio_priv(dev_info);
-	u8 id;
+	unsigned int id;
 	int ret;
 
-	ret = chip->bus.read(chip->bus.client, ADT7316_MANUFACTURE_ID, &id);
+	ret = regmap_read(chip->regmap, ADT7316_MANUFACTURE_ID, &id);
 	if (ret)
 		return -EIO;
 
@@ -1614,10 +1610,10 @@ static ssize_t adt7316_show_device_rev(struct device *dev,
 {
 	struct iio_dev *dev_info = dev_to_iio_dev(dev);
 	struct adt7316_chip_info *chip = iio_priv(dev_info);
-	u8 rev;
+	unsigned int rev;
 	int ret;
 
-	ret = chip->bus.read(chip->bus.client, ADT7316_DEVICE_REV, &rev);
+	ret = regmap_read(chip->regmap, ADT7316_DEVICE_REV, &rev);
 	if (ret)
 		return -EIO;
 
@@ -1632,10 +1628,10 @@ static ssize_t adt7316_show_bus_type(struct device *dev,
 {
 	struct iio_dev *dev_info = dev_to_iio_dev(dev);
 	struct adt7316_chip_info *chip = iio_priv(dev_info);
-	u8 stat;
+	unsigned int stat;
 	int ret;
 
-	ret = chip->bus.read(chip->bus.client, ADT7316_SPI_LOCK_STAT, &stat);
+	ret = regmap_read(chip->regmap, ADT7316_SPI_LOCK_STAT, &stat);
 	if (ret)
 		return -EIO;
 
@@ -1740,11 +1736,11 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 {
 	struct iio_dev *indio_dev = private;
 	struct adt7316_chip_info *chip = iio_priv(indio_dev);
-	u8 stat1, stat2;
+	unsigned int stat1, stat2;
 	int ret;
 	s64 time;
 
-	ret = chip->bus.read(chip->bus.client, ADT7316_INT_STAT1, &stat1);
+	ret = regmap_read(chip->regmap, ADT7316_INT_STAT1, &stat1);
 	if (!ret) {
 		if ((chip->id & ID_FAMILY_MASK) != ID_ADT75XX)
 			stat1 &= 0x1F;
@@ -1793,7 +1789,7 @@ static irqreturn_t adt7316_event_handler(int irq, void *private)
 							    IIO_EV_DIR_EITHER),
 				       time);
 		}
-	ret = chip->bus.read(chip->bus.client, ADT7316_INT_STAT2, &stat2);
+	ret = regmap_read(chip->regmap, ADT7316_INT_STAT2, &stat2);
 	if (!ret) {
 		if (stat2 & ADT7316_INT_MASK2_VDD)
 			iio_push_event(indio_dev,
@@ -1879,7 +1875,7 @@ static ssize_t adt7316_set_int_mask(struct device *dev,
 	else
 		mask = ADT7316_INT_MASK2_VDD;	/* disable vdd int */
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_INT_MASK2, mask);
+	ret = regmap_write(chip->regmap, ADT7316_INT_MASK2, mask);
 	if (!ret) {
 		chip->int_mask &= ~ADT7316_VDD_INT_MASK;
 		chip->int_mask |= data & ADT7316_VDD_INT_MASK;
@@ -1893,7 +1889,7 @@ static ssize_t adt7316_set_int_mask(struct device *dev,
 			/* mask in reg is opposite, set 1 to disable */
 			mask = (~data) & ADT7316_TEMP_AIN_INT_MASK;
 	}
-	ret = chip->bus.write(chip->bus.client, ADT7316_INT_MASK1, mask);
+	ret = regmap_write(chip->regmap, ADT7316_INT_MASK1, mask);
 
 	chip->int_mask = mask;
 
@@ -1907,7 +1903,7 @@ static inline ssize_t adt7316_show_ad_bound(struct device *dev,
 	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
 	struct iio_dev *dev_info = dev_to_iio_dev(dev);
 	struct adt7316_chip_info *chip = iio_priv(dev_info);
-	u8 val;
+	unsigned int val;
 	int data;
 	int ret;
 
@@ -1915,7 +1911,7 @@ static inline ssize_t adt7316_show_ad_bound(struct device *dev,
 		this_attr->address > ADT7316_EX_TEMP_LOW)
 		return -EPERM;
 
-	ret = chip->bus.read(chip->bus.client, this_attr->address, &val);
+	ret = regmap_read(chip->regmap, this_attr->address, &val);
 	if (ret)
 		return -EIO;
 
@@ -1964,7 +1960,7 @@ static inline ssize_t adt7316_set_ad_bound(struct device *dev,
 
 	val = (u8)data;
 
-	ret = chip->bus.write(chip->bus.client, this_attr->address, val);
+	ret = regmap_write(chip->regmap, this_attr->address, val);
 	if (ret)
 		return -EIO;
 
@@ -1995,7 +1991,7 @@ static ssize_t adt7316_set_int_enabled(struct device *dev,
 	if (buf[0] == '1')
 		config1 |= ADT7316_INT_EN;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, config1);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG1, config1);
 	if (ret)
 		return -EIO;
 
@@ -2132,7 +2128,7 @@ static const struct iio_info adt7516_info = {
 /*
  * device probe and remove
  */
-int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
+int adt7316_probe(struct device *dev, struct regmap *regmap,
 		  const char *name, int irq)
 {
 	struct adt7316_chip_info *chip;
@@ -2146,7 +2142,7 @@ int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 	/* this is only used for device removal purposes */
 	dev_set_drvdata(dev, indio_dev);
 
-	chip->bus = *bus;
+	chip->regmap = regmap;
 
 	if (name[4] == '3')
 		chip->id = ID_ADT7316 + (name[6] - '6');
@@ -2185,11 +2181,11 @@ int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
 			return ret;
 	}
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG1, chip->config1);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG1, chip->config1);
 	if (ret)
 		return -EIO;
 
-	ret = chip->bus.write(chip->bus.client, ADT7316_CONFIG3, chip->config3);
+	ret = regmap_write(chip->regmap, ADT7316_CONFIG3, chip->config3);
 	if (ret)
 		return -EIO;
 
diff --git a/drivers/staging/iio/addac/adt7316.h b/drivers/staging/iio/addac/adt7316.h
index e9f288420234..0162d4026e88 100644
--- a/drivers/staging/iio/addac/adt7316.h
+++ b/drivers/staging/iio/addac/adt7316.h
@@ -11,13 +11,13 @@
 
 #include <linux/types.h>
 #include <linux/pm.h>
+#include <linux/regmap.h>
 
 #define ADT7316_REG_MAX_ADDR		0x3F
 
-struct adt7316_bus {
-	void *client;
-	int (*read)(void *client, u8 reg, u8 *data);
-	int (*write)(void *client, u8 reg, u8 val);
+static const struct regmap_config adt7316_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
 };
 
 #ifdef CONFIG_PM_SLEEP
@@ -26,7 +26,7 @@ extern const struct dev_pm_ops adt7316_pm_ops;
 #else
 #define ADT7316_PM_OPS NULL
 #endif
-int adt7316_probe(struct device *dev, struct adt7316_bus *bus,
+int adt7316_probe(struct device *dev, struct regmap *regmap,
 		  const char *name, int irq);
 
 #endif
-- 
2.17.1

Re: [PATCH v2 0/3] adt7316 regmap implementation

[Jonathan Cameron]

On Sun, 20 Jan 2019 00:09:29 +0530
Shreeya Patel <shreeya.patel23498@gmail.com> wrote:

> This patchset consist of some initial patches for heading
> towards the regmap implementation and also the final patch
> which enables the driver to use regmap API thus removing
> the redundant and common code.
> 
> Shreeya Patel (3):
>   Staging: iio: adt7316: Remove irq from bus structure
>   Staging: iio: adt7316: Remove multi read and write functions
>   Staging: iio: adt7316: Add regmap support
> 
>  drivers/staging/iio/addac/adt7316-i2c.c | 101 ++--------------
>  drivers/staging/iio/addac/adt7316-spi.c |  95 +++------------
>  drivers/staging/iio/addac/adt7316.c     | 147 ++++++++++++------------
>  drivers/staging/iio/addac/adt7316.h     |  15 +--
>  4 files changed, 103 insertions(+), 255 deletions(-)
> 

Hi Shreeya,

I'm not seeing a change log for any of these. Please make sure to
add one so we know what changed since V1.  Saves a lot of trying
to remember things from a while back!

Thanks,

Jonathan

Re: [PATCH v2 0/3] adt7316 regmap implementation

[Shreeya Patel]

On Sat, 2019-01-19 at 19:04 +0000, Jonathan Cameron wrote:
> On Sun, 20 Jan 2019 00:09:29 +0530
> Shreeya Patel <shreeya.patel23498@gmail.com> wrote:
> 
> > This patchset consist of some initial patches for heading
> > towards the regmap implementation and also the final patch
> > which enables the driver to use regmap API thus removing
> > the redundant and common code.
> > 
> > Shreeya Patel (3):
> >   Staging: iio: adt7316: Remove irq from bus structure
> >   Staging: iio: adt7316: Remove multi read and write functions
> >   Staging: iio: adt7316: Add regmap support
> > 
> >  drivers/staging/iio/addac/adt7316-i2c.c | 101 ++--------------
> >  drivers/staging/iio/addac/adt7316-spi.c |  95 +++------------
> >  drivers/staging/iio/addac/adt7316.c     | 147 ++++++++++++------
> > ------
> >  drivers/staging/iio/addac/adt7316.h     |  15 +--
> >  4 files changed, 103 insertions(+), 255 deletions(-)
> > 
> 
> Hi Shreeya,
> 
> I'm not seeing a change log for any of these. Please make sure to
> add one so we know what changed since V1.  Saves a lot of trying
> to remember things from a while back!
> 

Sorry, I forgot to add it. I remembered it when I had already sent the
patches. 
I'll also cc Jeremy in V3.

Thanks

> Thanks,
> 
> Jonathan