linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH v3] staging: iio: ad2s1210: Switch to the gpio descriptor interface
@ 2018-10-23 19:04 Nishad Kamdar
  2018-10-24  6:52 ` Slawomir Stepien
  0 siblings, 1 reply; 3+ messages in thread
From: Nishad Kamdar @ 2018-10-23 19:04 UTC (permalink / raw)
  To: Slawomir Stepien
  Cc: Lars-Peter Clausen, Michael Hennerich, Jonathan Cameron,
	Hartmut Knaack, Peter Meerwald-Stadler, Greg Kroah-Hartman,
	linux-iio, devel, linux-kernel

Use the gpiod interface instead of the deprecated old non-descriptor
interface.

Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
---
Changes in v3:
 - Use a pointer to pointer for gpio_desc in
   struct ad2s1210_gpio as it will be used to
   modify a pointer.
 - Use dot notation to initialize the structure.
 - Use a pointer variable to avoid writing gpios[i].
Changes in v2:
 - Use the spi_device struct embedded in st instead
   of passing it as an argument to ad2s1210_setup_gpios().
 - Use an array of structs to reduce redundant code in
   in ad2s1210_setup_gpios().
 - Remove ad2s1210_free_gpios() as devm API is being used.
---
 drivers/staging/iio/resolver/ad2s1210.c | 92 ++++++++++++++-----------
 drivers/staging/iio/resolver/ad2s1210.h |  3 -
 2 files changed, 50 insertions(+), 45 deletions(-)

diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
index ac13b99bd9cb..fbf0cc722979 100644
--- a/drivers/staging/iio/resolver/ad2s1210.c
+++ b/drivers/staging/iio/resolver/ad2s1210.c
@@ -15,7 +15,7 @@
 #include <linux/slab.h>
 #include <linux/sysfs.h>
 #include <linux/delay.h>
-#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/module.h>
 
 #include <linux/iio/iio.h>
@@ -69,10 +69,21 @@ enum ad2s1210_mode {
 
 static const unsigned int ad2s1210_resolution_value[] = { 10, 12, 14, 16 };
 
+struct ad2s1210_gpio {
+	struct gpio_desc **ptr;
+	const char *name;
+	unsigned long flags;
+};
+
 struct ad2s1210_state {
 	const struct ad2s1210_platform_data *pdata;
 	struct mutex lock;
 	struct spi_device *sdev;
+	struct gpio_desc *sample;
+	struct gpio_desc *a0;
+	struct gpio_desc *a1;
+	struct gpio_desc *res0;
+	struct gpio_desc *res1;
 	unsigned int fclkin;
 	unsigned int fexcit;
 	bool hysteresis;
@@ -91,8 +102,8 @@ static const int ad2s1210_mode_vals[4][2] = {
 static inline void ad2s1210_set_mode(enum ad2s1210_mode mode,
 				     struct ad2s1210_state *st)
 {
-	gpio_set_value(st->pdata->a[0], ad2s1210_mode_vals[mode][0]);
-	gpio_set_value(st->pdata->a[1], ad2s1210_mode_vals[mode][1]);
+	gpiod_set_value(st->a0, ad2s1210_mode_vals[mode][0]);
+	gpiod_set_value(st->a1, ad2s1210_mode_vals[mode][1]);
 	st->mode = mode;
 }
 
@@ -152,8 +163,8 @@ int ad2s1210_update_frequency_control_word(struct ad2s1210_state *st)
 
 static unsigned char ad2s1210_read_resolution_pin(struct ad2s1210_state *st)
 {
-	int resolution = (gpio_get_value(st->pdata->res[0]) << 1) |
-			  gpio_get_value(st->pdata->res[1]);
+	int resolution = (gpiod_get_value(st->res0) << 1) |
+			  gpiod_get_value(st->res1);
 
 	return ad2s1210_resolution_value[resolution];
 }
@@ -164,10 +175,10 @@ static const int ad2s1210_res_pins[4][2] = {
 
 static inline void ad2s1210_set_resolution_pin(struct ad2s1210_state *st)
 {
-	gpio_set_value(st->pdata->res[0],
-		       ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
-	gpio_set_value(st->pdata->res[1],
-		       ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
+	gpiod_set_value(st->res0,
+			ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
+	gpiod_set_value(st->res1,
+			ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
 }
 
 static inline int ad2s1210_soft_reset(struct ad2s1210_state *st)
@@ -401,15 +412,15 @@ static ssize_t ad2s1210_clear_fault(struct device *dev,
 	int ret;
 
 	mutex_lock(&st->lock);
-	gpio_set_value(st->pdata->sample, 0);
+	gpiod_set_value(st->sample, 0);
 	/* delay (2 * tck + 20) nano seconds */
 	udelay(1);
-	gpio_set_value(st->pdata->sample, 1);
+	gpiod_set_value(st->sample, 1);
 	ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT);
 	if (ret < 0)
 		goto error_ret;
-	gpio_set_value(st->pdata->sample, 0);
-	gpio_set_value(st->pdata->sample, 1);
+	gpiod_set_value(st->sample, 0);
+	gpiod_set_value(st->sample, 1);
 error_ret:
 	mutex_unlock(&st->lock);
 
@@ -466,7 +477,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
 	s16 vel;
 
 	mutex_lock(&st->lock);
-	gpio_set_value(st->pdata->sample, 0);
+	gpiod_set_value(st->sample, 0);
 	/* delay (6 * tck + 20) nano seconds */
 	udelay(1);
 
@@ -512,7 +523,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
 	}
 
 error_ret:
-	gpio_set_value(st->pdata->sample, 1);
+	gpiod_set_value(st->sample, 1);
 	/* delay (2 * tck + 20) nano seconds */
 	udelay(1);
 	mutex_unlock(&st->lock);
@@ -630,30 +641,32 @@ static const struct iio_info ad2s1210_info = {
 
 static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
 {
-	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
-	struct gpio ad2s1210_gpios[] = {
-		{ st->pdata->sample, GPIOF_DIR_IN, "sample" },
-		{ st->pdata->a[0], flags, "a0" },
-		{ st->pdata->a[1], flags, "a1" },
-		{ st->pdata->res[0], flags, "res0" },
-		{ st->pdata->res[0], flags, "res1" },
+	int ret, i;
+	struct spi_device *spi = st->sdev;
+	struct ad2s1210_gpio *pin;
+	unsigned long flags = st->pdata->gpioin ? GPIOD_IN : GPIOD_OUT_LOW;
+
+	struct ad2s1210_gpio gpios[] = {
+		{.ptr = &st->sample, .name = "sample", .flags = GPIOD_IN},
+		{.ptr = &st->a0, .name = "a0", .flags = flags},
+		{.ptr = &st->a1, .name = "a1", .flags = flags},
+		{.ptr = &st->res0, .name = "res0", .flags = flags},
+		{.ptr = &st->res1, .name = "res1", .flags = flags},
 	};
 
-	return gpio_request_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
-}
-
-static void ad2s1210_free_gpios(struct ad2s1210_state *st)
-{
-	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
-	struct gpio ad2s1210_gpios[] = {
-		{ st->pdata->sample, GPIOF_DIR_IN, "sample" },
-		{ st->pdata->a[0], flags, "a0" },
-		{ st->pdata->a[1], flags, "a1" },
-		{ st->pdata->res[0], flags, "res0" },
-		{ st->pdata->res[0], flags, "res1" },
-	};
+	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
+		pin = &gpios[i];
+		*pin->ptr = devm_gpiod_get(&spi->dev, pin->name,
+					   pin->flags);
+		if (IS_ERR(pin->ptr)) {
+			ret = PTR_ERR(pin->ptr);
+			dev_err(&spi->dev, "Failed to request %s GPIO: %d\n",
+				pin->name, ret);
+			return ret;
+		}
+	}
 
-	gpio_free_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
+	return 0;
 }
 
 static int ad2s1210_probe(struct spi_device *spi)
@@ -692,7 +705,7 @@ static int ad2s1210_probe(struct spi_device *spi)
 
 	ret = iio_device_register(indio_dev);
 	if (ret)
-		goto error_free_gpios;
+		return ret;
 
 	st->fclkin = spi->max_speed_hz;
 	spi->mode = SPI_MODE_3;
@@ -700,10 +713,6 @@ static int ad2s1210_probe(struct spi_device *spi)
 	ad2s1210_initial(st);
 
 	return 0;
-
-error_free_gpios:
-	ad2s1210_free_gpios(st);
-	return ret;
 }
 
 static int ad2s1210_remove(struct spi_device *spi)
@@ -711,7 +720,6 @@ static int ad2s1210_remove(struct spi_device *spi)
 	struct iio_dev *indio_dev = spi_get_drvdata(spi);
 
 	iio_device_unregister(indio_dev);
-	ad2s1210_free_gpios(iio_priv(indio_dev));
 
 	return 0;
 }
diff --git a/drivers/staging/iio/resolver/ad2s1210.h b/drivers/staging/iio/resolver/ad2s1210.h
index e9b2147701fc..63d479b20a6c 100644
--- a/drivers/staging/iio/resolver/ad2s1210.h
+++ b/drivers/staging/iio/resolver/ad2s1210.h
@@ -12,9 +12,6 @@
 #define _AD2S1210_H
 
 struct ad2s1210_platform_data {
-	unsigned int		sample;
-	unsigned int		a[2];
-	unsigned int		res[2];
 	bool			gpioin;
 };
 #endif /* _AD2S1210_H */
-- 
2.17.1


^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v3] staging: iio: ad2s1210: Switch to the gpio descriptor interface
  2018-10-23 19:04 [PATCH v3] staging: iio: ad2s1210: Switch to the gpio descriptor interface Nishad Kamdar
@ 2018-10-24  6:52 ` Slawomir Stepien
  2018-10-24 14:10   ` Nishad Kamdar
  0 siblings, 1 reply; 3+ messages in thread
From: Slawomir Stepien @ 2018-10-24  6:52 UTC (permalink / raw)
  To: Nishad Kamdar
  Cc: Lars-Peter Clausen, Michael Hennerich, Jonathan Cameron,
	Hartmut Knaack, Peter Meerwald-Stadler, Greg Kroah-Hartman,
	linux-iio, devel, linux-kernel

On paź 24, 2018 00:34, Nishad Kamdar wrote:
> Use the gpiod interface instead of the deprecated old non-descriptor
> interface.

Hi Nishad

Few more comments from me below.

> Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
> ---
> Changes in v3:
>  - Use a pointer to pointer for gpio_desc in
>    struct ad2s1210_gpio as it will be used to
>    modify a pointer.
>  - Use dot notation to initialize the structure.
>  - Use a pointer variable to avoid writing gpios[i].
> Changes in v2:
>  - Use the spi_device struct embedded in st instead
>    of passing it as an argument to ad2s1210_setup_gpios().
>  - Use an array of structs to reduce redundant code in
>    in ad2s1210_setup_gpios().
>  - Remove ad2s1210_free_gpios() as devm API is being used.
> ---
>  drivers/staging/iio/resolver/ad2s1210.c | 92 ++++++++++++++-----------
>  drivers/staging/iio/resolver/ad2s1210.h |  3 -
>  2 files changed, 50 insertions(+), 45 deletions(-)
> 
> diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
> index ac13b99bd9cb..fbf0cc722979 100644
> --- a/drivers/staging/iio/resolver/ad2s1210.c
> +++ b/drivers/staging/iio/resolver/ad2s1210.c
> @@ -15,7 +15,7 @@
>  #include <linux/slab.h>
>  #include <linux/sysfs.h>
>  #include <linux/delay.h>
> -#include <linux/gpio.h>
> +#include <linux/gpio/consumer.h>
>  #include <linux/module.h>
>  
>  #include <linux/iio/iio.h>
> @@ -69,10 +69,21 @@ enum ad2s1210_mode {
>  
>  static const unsigned int ad2s1210_resolution_value[] = { 10, 12, 14, 16 };
>  
> +struct ad2s1210_gpio {
> +	struct gpio_desc **ptr;
> +	const char *name;
> +	unsigned long flags;
> +};
> +
>  struct ad2s1210_state {
>  	const struct ad2s1210_platform_data *pdata;
>  	struct mutex lock;
>  	struct spi_device *sdev;
> +	struct gpio_desc *sample;
> +	struct gpio_desc *a0;
> +	struct gpio_desc *a1;
> +	struct gpio_desc *res0;
> +	struct gpio_desc *res1;
>  	unsigned int fclkin;
>  	unsigned int fexcit;
>  	bool hysteresis;
> @@ -91,8 +102,8 @@ static const int ad2s1210_mode_vals[4][2] = {
>  static inline void ad2s1210_set_mode(enum ad2s1210_mode mode,
>  				     struct ad2s1210_state *st)
>  {
> -	gpio_set_value(st->pdata->a[0], ad2s1210_mode_vals[mode][0]);
> -	gpio_set_value(st->pdata->a[1], ad2s1210_mode_vals[mode][1]);
> +	gpiod_set_value(st->a0, ad2s1210_mode_vals[mode][0]);
> +	gpiod_set_value(st->a1, ad2s1210_mode_vals[mode][1]);
>  	st->mode = mode;
>  }
>  
> @@ -152,8 +163,8 @@ int ad2s1210_update_frequency_control_word(struct ad2s1210_state *st)
>  
>  static unsigned char ad2s1210_read_resolution_pin(struct ad2s1210_state *st)
>  {
> -	int resolution = (gpio_get_value(st->pdata->res[0]) << 1) |
> -			  gpio_get_value(st->pdata->res[1]);
> +	int resolution = (gpiod_get_value(st->res0) << 1) |
> +			  gpiod_get_value(st->res1);
>  
>  	return ad2s1210_resolution_value[resolution];
>  }
> @@ -164,10 +175,10 @@ static const int ad2s1210_res_pins[4][2] = {
>  
>  static inline void ad2s1210_set_resolution_pin(struct ad2s1210_state *st)
>  {
> -	gpio_set_value(st->pdata->res[0],
> -		       ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
> -	gpio_set_value(st->pdata->res[1],
> -		       ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
> +	gpiod_set_value(st->res0,
> +			ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
> +	gpiod_set_value(st->res1,
> +			ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
>  }
>  
>  static inline int ad2s1210_soft_reset(struct ad2s1210_state *st)
> @@ -401,15 +412,15 @@ static ssize_t ad2s1210_clear_fault(struct device *dev,
>  	int ret;
>  
>  	mutex_lock(&st->lock);
> -	gpio_set_value(st->pdata->sample, 0);
> +	gpiod_set_value(st->sample, 0);
>  	/* delay (2 * tck + 20) nano seconds */
>  	udelay(1);
> -	gpio_set_value(st->pdata->sample, 1);
> +	gpiod_set_value(st->sample, 1);
>  	ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT);
>  	if (ret < 0)
>  		goto error_ret;
> -	gpio_set_value(st->pdata->sample, 0);
> -	gpio_set_value(st->pdata->sample, 1);
> +	gpiod_set_value(st->sample, 0);
> +	gpiod_set_value(st->sample, 1);
>  error_ret:
>  	mutex_unlock(&st->lock);
>  
> @@ -466,7 +477,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
>  	s16 vel;
>  
>  	mutex_lock(&st->lock);
> -	gpio_set_value(st->pdata->sample, 0);
> +	gpiod_set_value(st->sample, 0);
>  	/* delay (6 * tck + 20) nano seconds */
>  	udelay(1);
>  
> @@ -512,7 +523,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
>  	}
>  
>  error_ret:
> -	gpio_set_value(st->pdata->sample, 1);
> +	gpiod_set_value(st->sample, 1);
>  	/* delay (2 * tck + 20) nano seconds */
>  	udelay(1);
>  	mutex_unlock(&st->lock);
> @@ -630,30 +641,32 @@ static const struct iio_info ad2s1210_info = {
>  
>  static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
>  {
> -	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
> -	struct gpio ad2s1210_gpios[] = {
> -		{ st->pdata->sample, GPIOF_DIR_IN, "sample" },
> -		{ st->pdata->a[0], flags, "a0" },
> -		{ st->pdata->a[1], flags, "a1" },
> -		{ st->pdata->res[0], flags, "res0" },
> -		{ st->pdata->res[0], flags, "res1" },
> +	int ret, i;
> +	struct spi_device *spi = st->sdev;
> +	struct ad2s1210_gpio *pin;
> +	unsigned long flags = st->pdata->gpioin ? GPIOD_IN : GPIOD_OUT_LOW;
> +
> +	struct ad2s1210_gpio gpios[] = {
> +		{.ptr = &st->sample, .name = "sample", .flags = GPIOD_IN},
> +		{.ptr = &st->a0, .name = "a0", .flags = flags},
> +		{.ptr = &st->a1, .name = "a1", .flags = flags},
> +		{.ptr = &st->res0, .name = "res0", .flags = flags},
> +		{.ptr = &st->res1, .name = "res1", .flags = flags},
>  	};

I think that you should add spaces after { and before }. It's the file style
from what I see.

>  
> -	return gpio_request_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
> -}
> -
> -static void ad2s1210_free_gpios(struct ad2s1210_state *st)
> -{
> -	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
> -	struct gpio ad2s1210_gpios[] = {
> -		{ st->pdata->sample, GPIOF_DIR_IN, "sample" },
> -		{ st->pdata->a[0], flags, "a0" },
> -		{ st->pdata->a[1], flags, "a1" },
> -		{ st->pdata->res[0], flags, "res0" },
> -		{ st->pdata->res[0], flags, "res1" },
> -	};
> +	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
> +		pin = &gpios[i];
> +		*pin->ptr = devm_gpiod_get(&spi->dev, pin->name,
> +					   pin->flags);

This can now fit into one line.

> +		if (IS_ERR(pin->ptr)) {

Here you are checking the wrong pointer. Also notice the line below.

> +			ret = PTR_ERR(pin->ptr);
> +			dev_err(&spi->dev, "Failed to request %s GPIO: %d\n",
> +				pin->name, ret);

Please notice how other dev_err looks like in this code. Align the message to
the existing format.

> +			return ret;
> +		}
> +	}
>  
> -	gpio_free_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
> +	return 0;
>  }
>  
>  static int ad2s1210_probe(struct spi_device *spi)
> @@ -692,7 +705,7 @@ static int ad2s1210_probe(struct spi_device *spi)
>  
>  	ret = iio_device_register(indio_dev);
>  	if (ret)
> -		goto error_free_gpios;
> +		return ret;
>  
>  	st->fclkin = spi->max_speed_hz;
>  	spi->mode = SPI_MODE_3;
> @@ -700,10 +713,6 @@ static int ad2s1210_probe(struct spi_device *spi)
>  	ad2s1210_initial(st);
>  
>  	return 0;
> -
> -error_free_gpios:
> -	ad2s1210_free_gpios(st);
> -	return ret;
>  }
>  
>  static int ad2s1210_remove(struct spi_device *spi)
> @@ -711,7 +720,6 @@ static int ad2s1210_remove(struct spi_device *spi)
>  	struct iio_dev *indio_dev = spi_get_drvdata(spi);
>  
>  	iio_device_unregister(indio_dev);
> -	ad2s1210_free_gpios(iio_priv(indio_dev));
>  
>  	return 0;
>  }
> diff --git a/drivers/staging/iio/resolver/ad2s1210.h b/drivers/staging/iio/resolver/ad2s1210.h
> index e9b2147701fc..63d479b20a6c 100644
> --- a/drivers/staging/iio/resolver/ad2s1210.h
> +++ b/drivers/staging/iio/resolver/ad2s1210.h
> @@ -12,9 +12,6 @@
>  #define _AD2S1210_H
>  
>  struct ad2s1210_platform_data {
> -	unsigned int		sample;
> -	unsigned int		a[2];
> -	unsigned int		res[2];
>  	bool			gpioin;
>  };
>  #endif /* _AD2S1210_H */

-- 
Slawomir Stepien

^ permalink raw reply	[flat|nested] 3+ messages in thread

* Re: [PATCH v3] staging: iio: ad2s1210: Switch to the gpio descriptor interface
  2018-10-24  6:52 ` Slawomir Stepien
@ 2018-10-24 14:10   ` Nishad Kamdar
  0 siblings, 0 replies; 3+ messages in thread
From: Nishad Kamdar @ 2018-10-24 14:10 UTC (permalink / raw)
  To: Slawomir Stepien
  Cc: Lars-Peter Clausen, Michael Hennerich, Jonathan Cameron,
	Hartmut Knaack, Peter Meerwald-Stadler, Greg Kroah-Hartman,
	linux-iio, devel, linux-kernel

On Wed, Oct 24, 2018 at 08:52:49AM +0200, Slawomir Stepien wrote:
> On paź 24, 2018 00:34, Nishad Kamdar wrote:
> > Use the gpiod interface instead of the deprecated old non-descriptor
> > interface.
> 
> Hi Nishad
> 
> Few more comments from me below.
> 
> > Signed-off-by: Nishad Kamdar <nishadkamdar@gmail.com>
> > ---
> > Changes in v3:
> >  - Use a pointer to pointer for gpio_desc in
> >    struct ad2s1210_gpio as it will be used to
> >    modify a pointer.
> >  - Use dot notation to initialize the structure.
> >  - Use a pointer variable to avoid writing gpios[i].
> > Changes in v2:
> >  - Use the spi_device struct embedded in st instead
> >    of passing it as an argument to ad2s1210_setup_gpios().
> >  - Use an array of structs to reduce redundant code in
> >    in ad2s1210_setup_gpios().
> >  - Remove ad2s1210_free_gpios() as devm API is being used.
> > ---
> >  drivers/staging/iio/resolver/ad2s1210.c | 92 ++++++++++++++-----------
> >  drivers/staging/iio/resolver/ad2s1210.h |  3 -
> >  2 files changed, 50 insertions(+), 45 deletions(-)
> > 
> > diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
> > index ac13b99bd9cb..fbf0cc722979 100644
> > --- a/drivers/staging/iio/resolver/ad2s1210.c
> > +++ b/drivers/staging/iio/resolver/ad2s1210.c
> > @@ -15,7 +15,7 @@
> >  #include <linux/slab.h>
> >  #include <linux/sysfs.h>
> >  #include <linux/delay.h>
> > -#include <linux/gpio.h>
> > +#include <linux/gpio/consumer.h>
> >  #include <linux/module.h>
> >  
> >  #include <linux/iio/iio.h>
> > @@ -69,10 +69,21 @@ enum ad2s1210_mode {
> >  
> >  static const unsigned int ad2s1210_resolution_value[] = { 10, 12, 14, 16 };
> >  
> > +struct ad2s1210_gpio {
> > +	struct gpio_desc **ptr;
> > +	const char *name;
> > +	unsigned long flags;
> > +};
> > +
> >  struct ad2s1210_state {
> >  	const struct ad2s1210_platform_data *pdata;
> >  	struct mutex lock;
> >  	struct spi_device *sdev;
> > +	struct gpio_desc *sample;
> > +	struct gpio_desc *a0;
> > +	struct gpio_desc *a1;
> > +	struct gpio_desc *res0;
> > +	struct gpio_desc *res1;
> >  	unsigned int fclkin;
> >  	unsigned int fexcit;
> >  	bool hysteresis;
> > @@ -91,8 +102,8 @@ static const int ad2s1210_mode_vals[4][2] = {
> >  static inline void ad2s1210_set_mode(enum ad2s1210_mode mode,
> >  				     struct ad2s1210_state *st)
> >  {
> > -	gpio_set_value(st->pdata->a[0], ad2s1210_mode_vals[mode][0]);
> > -	gpio_set_value(st->pdata->a[1], ad2s1210_mode_vals[mode][1]);
> > +	gpiod_set_value(st->a0, ad2s1210_mode_vals[mode][0]);
> > +	gpiod_set_value(st->a1, ad2s1210_mode_vals[mode][1]);
> >  	st->mode = mode;
> >  }
> >  
> > @@ -152,8 +163,8 @@ int ad2s1210_update_frequency_control_word(struct ad2s1210_state *st)
> >  
> >  static unsigned char ad2s1210_read_resolution_pin(struct ad2s1210_state *st)
> >  {
> > -	int resolution = (gpio_get_value(st->pdata->res[0]) << 1) |
> > -			  gpio_get_value(st->pdata->res[1]);
> > +	int resolution = (gpiod_get_value(st->res0) << 1) |
> > +			  gpiod_get_value(st->res1);
> >  
> >  	return ad2s1210_resolution_value[resolution];
> >  }
> > @@ -164,10 +175,10 @@ static const int ad2s1210_res_pins[4][2] = {
> >  
> >  static inline void ad2s1210_set_resolution_pin(struct ad2s1210_state *st)
> >  {
> > -	gpio_set_value(st->pdata->res[0],
> > -		       ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
> > -	gpio_set_value(st->pdata->res[1],
> > -		       ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
> > +	gpiod_set_value(st->res0,
> > +			ad2s1210_res_pins[(st->resolution - 10) / 2][0]);
> > +	gpiod_set_value(st->res1,
> > +			ad2s1210_res_pins[(st->resolution - 10) / 2][1]);
> >  }
> >  
> >  static inline int ad2s1210_soft_reset(struct ad2s1210_state *st)
> > @@ -401,15 +412,15 @@ static ssize_t ad2s1210_clear_fault(struct device *dev,
> >  	int ret;
> >  
> >  	mutex_lock(&st->lock);
> > -	gpio_set_value(st->pdata->sample, 0);
> > +	gpiod_set_value(st->sample, 0);
> >  	/* delay (2 * tck + 20) nano seconds */
> >  	udelay(1);
> > -	gpio_set_value(st->pdata->sample, 1);
> > +	gpiod_set_value(st->sample, 1);
> >  	ret = ad2s1210_config_read(st, AD2S1210_REG_FAULT);
> >  	if (ret < 0)
> >  		goto error_ret;
> > -	gpio_set_value(st->pdata->sample, 0);
> > -	gpio_set_value(st->pdata->sample, 1);
> > +	gpiod_set_value(st->sample, 0);
> > +	gpiod_set_value(st->sample, 1);
> >  error_ret:
> >  	mutex_unlock(&st->lock);
> >  
> > @@ -466,7 +477,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
> >  	s16 vel;
> >  
> >  	mutex_lock(&st->lock);
> > -	gpio_set_value(st->pdata->sample, 0);
> > +	gpiod_set_value(st->sample, 0);
> >  	/* delay (6 * tck + 20) nano seconds */
> >  	udelay(1);
> >  
> > @@ -512,7 +523,7 @@ static int ad2s1210_read_raw(struct iio_dev *indio_dev,
> >  	}
> >  
> >  error_ret:
> > -	gpio_set_value(st->pdata->sample, 1);
> > +	gpiod_set_value(st->sample, 1);
> >  	/* delay (2 * tck + 20) nano seconds */
> >  	udelay(1);
> >  	mutex_unlock(&st->lock);
> > @@ -630,30 +641,32 @@ static const struct iio_info ad2s1210_info = {
> >  
> >  static int ad2s1210_setup_gpios(struct ad2s1210_state *st)
> >  {
> > -	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
> > -	struct gpio ad2s1210_gpios[] = {
> > -		{ st->pdata->sample, GPIOF_DIR_IN, "sample" },
> > -		{ st->pdata->a[0], flags, "a0" },
> > -		{ st->pdata->a[1], flags, "a1" },
> > -		{ st->pdata->res[0], flags, "res0" },
> > -		{ st->pdata->res[0], flags, "res1" },
> > +	int ret, i;
> > +	struct spi_device *spi = st->sdev;
> > +	struct ad2s1210_gpio *pin;
> > +	unsigned long flags = st->pdata->gpioin ? GPIOD_IN : GPIOD_OUT_LOW;
> > +
> > +	struct ad2s1210_gpio gpios[] = {
> > +		{.ptr = &st->sample, .name = "sample", .flags = GPIOD_IN},
> > +		{.ptr = &st->a0, .name = "a0", .flags = flags},
> > +		{.ptr = &st->a1, .name = "a1", .flags = flags},
> > +		{.ptr = &st->res0, .name = "res0", .flags = flags},
> > +		{.ptr = &st->res1, .name = "res1", .flags = flags},
> >  	};
> 
> I think that you should add spaces after { and before }. It's the file style
> from what I see.

Ok. I'll do that.
> 
> >  
> > -	return gpio_request_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
> > -}
> > -
> > -static void ad2s1210_free_gpios(struct ad2s1210_state *st)
> > -{
> > -	unsigned long flags = st->pdata->gpioin ? GPIOF_DIR_IN : GPIOF_DIR_OUT;
> > -	struct gpio ad2s1210_gpios[] = {
> > -		{ st->pdata->sample, GPIOF_DIR_IN, "sample" },
> > -		{ st->pdata->a[0], flags, "a0" },
> > -		{ st->pdata->a[1], flags, "a1" },
> > -		{ st->pdata->res[0], flags, "res0" },
> > -		{ st->pdata->res[0], flags, "res1" },
> > -	};
> > +	for (i = 0; i < ARRAY_SIZE(gpios); i++) {
> > +		pin = &gpios[i];
> > +		*pin->ptr = devm_gpiod_get(&spi->dev, pin->name,
> > +					   pin->flags);
> 
> This can now fit into one line.
> 
> > +		if (IS_ERR(pin->ptr)) {
> 
> Here you are checking the wrong pointer. Also notice the line below.
> 

Yes. I'll change that.
> > +			ret = PTR_ERR(pin->ptr);
> > +			dev_err(&spi->dev, "Failed to request %s GPIO: %d\n",
> > +				pin->name, ret);
> 
> Please notice how other dev_err looks like in this code. Align the message to
> the existing format.
> 

Ok. I'll do that.
> > +			return ret;
> > +		}
> > +	}
> >  
> > -	gpio_free_array(ad2s1210_gpios, ARRAY_SIZE(ad2s1210_gpios));
> > +	return 0;
> >  }
> >  
> >  static int ad2s1210_probe(struct spi_device *spi)
> > @@ -692,7 +705,7 @@ static int ad2s1210_probe(struct spi_device *spi)
> >  
> >  	ret = iio_device_register(indio_dev);
> >  	if (ret)
> > -		goto error_free_gpios;
> > +		return ret;
> >  
> >  	st->fclkin = spi->max_speed_hz;
> >  	spi->mode = SPI_MODE_3;
> > @@ -700,10 +713,6 @@ static int ad2s1210_probe(struct spi_device *spi)
> >  	ad2s1210_initial(st);
> >  
> >  	return 0;
> > -
> > -error_free_gpios:
> > -	ad2s1210_free_gpios(st);
> > -	return ret;
> >  }
> >  
> >  static int ad2s1210_remove(struct spi_device *spi)
> > @@ -711,7 +720,6 @@ static int ad2s1210_remove(struct spi_device *spi)
> >  	struct iio_dev *indio_dev = spi_get_drvdata(spi);
> >  
> >  	iio_device_unregister(indio_dev);
> > -	ad2s1210_free_gpios(iio_priv(indio_dev));
> >  
> >  	return 0;
> >  }
> > diff --git a/drivers/staging/iio/resolver/ad2s1210.h b/drivers/staging/iio/resolver/ad2s1210.h
> > index e9b2147701fc..63d479b20a6c 100644
> > --- a/drivers/staging/iio/resolver/ad2s1210.h
> > +++ b/drivers/staging/iio/resolver/ad2s1210.h
> > @@ -12,9 +12,6 @@
> >  #define _AD2S1210_H
> >  
> >  struct ad2s1210_platform_data {
> > -	unsigned int		sample;
> > -	unsigned int		a[2];
> > -	unsigned int		res[2];
> >  	bool			gpioin;
> >  };
> >  #endif /* _AD2S1210_H */
> 
> -- 
> Slawomir Stepien

Thanks for the review.

regards,
Nishad

^ permalink raw reply	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2018-10-24 14:10 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-10-23 19:04 [PATCH v3] staging: iio: ad2s1210: Switch to the gpio descriptor interface Nishad Kamdar
2018-10-24  6:52 ` Slawomir Stepien
2018-10-24 14:10   ` Nishad Kamdar

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).