[PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Andy Shevchenko]

Allow to use driver on non-OF platforms and other cleanups.

Changelog v2:
- rename pm3309c_parse_dt_node() --> mp3309c_parse_fwnode() (Daniel)
- add tags (Daniel, Flavio)
- new patch 2

Andy Shevchenko (3):
  backlight: mp3309c: Make use of device properties
  backlight: mp3309c: use dev_err_probe() instead of dev_err()
  backlight: mp3309c: Utilise temporary variable for struct device

 drivers/video/backlight/mp3309c.c | 88 ++++++++++++-------------------
 1 file changed, 35 insertions(+), 53 deletions(-)

-- 
2.43.0.rc1.1.gbec44491f096

[PATCH v2 1/3] backlight: mp3309c: Make use of device properties

[Andy Shevchenko]

Convert the module to be property provider agnostic and allow
it to be used on non-OF platforms.

Add mod_devicetable.h include.

Tested-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/video/backlight/mp3309c.c | 44 +++++++++++++------------------
 1 file changed, 18 insertions(+), 26 deletions(-)

diff --git a/drivers/video/backlight/mp3309c.c b/drivers/video/backlight/mp3309c.c
index 34d71259fac1..762bd738c903 100644
--- a/drivers/video/backlight/mp3309c.c
+++ b/drivers/video/backlight/mp3309c.c
@@ -15,6 +15,8 @@
 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
 #include <linux/pwm.h>
 #include <linux/regmap.h>
 
@@ -199,18 +201,15 @@ static const struct backlight_ops mp3309c_bl_ops = {
 	.update_status = mp3309c_bl_update_status,
 };
 
-static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
-				 struct mp3309c_platform_data *pdata)
+static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
+				struct mp3309c_platform_data *pdata)
 {
-	struct device_node *node = chip->dev->of_node;
-	struct property *prop_pwms;
-	struct property *prop_levels = NULL;
-	int length = 0;
 	int ret, i;
 	unsigned int num_levels, tmp_value;
+	struct device *dev = chip->dev;
 
-	if (!node) {
-		dev_err(chip->dev, "failed to get DT node\n");
+	if (!dev_fwnode(dev)) {
+		dev_err(dev, "failed to get firmware node\n");
 		return -ENODEV;
 	}
 
@@ -224,8 +223,7 @@ static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
 	 * found in the backlight node, the mode switches to PWM mode.
 	 */
 	pdata->dimming_mode = DIMMING_ANALOG_I2C;
-	prop_pwms = of_find_property(node, "pwms", &length);
-	if (prop_pwms) {
+	if (device_property_present(dev, "pwms")) {
 		chip->pwmd = devm_pwm_get(chip->dev, NULL);
 		if (IS_ERR(chip->pwmd))
 			return dev_err_probe(chip->dev, PTR_ERR(chip->pwmd),
@@ -257,11 +255,9 @@ static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
 		/*
 		 * PWM control mode: check for brightness level in DT
 		 */
-		prop_levels = of_find_property(node, "brightness-levels",
-					       &length);
-		if (prop_levels) {
+		if (device_property_present(dev, "brightness-levels")) {
 			/* Read brightness levels from DT */
-			num_levels = length / sizeof(u32);
+			num_levels = device_property_count_u32(dev, "brightness-levels");
 			if (num_levels < 2)
 				return -EINVAL;
 		} else {
@@ -275,10 +271,9 @@ static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
 				     sizeof(*pdata->levels), GFP_KERNEL);
 	if (!pdata->levels)
 		return -ENOMEM;
-	if (prop_levels) {
-		ret = of_property_read_u32_array(node, "brightness-levels",
-						 pdata->levels,
-						 num_levels);
+	if (device_property_present(dev, "brightness-levels")) {
+		ret = device_property_read_u32_array(dev, "brightness-levels",
+						     pdata->levels, num_levels);
 		if (ret < 0)
 			return ret;
 	} else {
@@ -288,8 +283,7 @@ static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
 
 	pdata->max_brightness = num_levels - 1;
 
-	ret = of_property_read_u32(node, "default-brightness",
-				   &pdata->default_brightness);
+	ret = device_property_read_u32(dev, "default-brightness", &pdata->default_brightness);
 	if (ret)
 		pdata->default_brightness = pdata->max_brightness;
 	if (pdata->default_brightness > pdata->max_brightness) {
@@ -310,8 +304,8 @@ static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
 	 * If missing, the default value for OVP is 35.5V
 	 */
 	pdata->over_voltage_protection = REG_I2C_1_OVP1;
-	if (!of_property_read_u32(node, "mps,overvoltage-protection-microvolt",
-				  &tmp_value)) {
+	ret = device_property_read_u32(dev, "mps,overvoltage-protection-microvolt", &tmp_value);
+	if (!ret) {
 		switch (tmp_value) {
 		case 13500000:
 			pdata->over_voltage_protection = 0x00;
@@ -328,9 +322,7 @@ static int pm3309c_parse_dt_node(struct mp3309c_chip *chip,
 	}
 
 	/* Synchronous (default) and non-synchronous mode */
-	pdata->sync_mode = true;
-	if (of_property_read_bool(node, "mps,no-sync-mode"))
-		pdata->sync_mode = false;
+	pdata->sync_mode = !device_property_read_bool(dev, "mps,no-sync-mode");
 
 	return 0;
 }
@@ -366,7 +358,7 @@ static int mp3309c_probe(struct i2c_client *client)
 		if (!pdata)
 			return -ENOMEM;
 
-		ret = pm3309c_parse_dt_node(chip, pdata);
+		ret = mp3309c_parse_fwnode(chip, pdata);
 		if (ret)
 			return ret;
 	}
-- 
2.43.0.rc1.1.gbec44491f096

[PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()

[Andy Shevchenko]

Replace dev_err() with dev_err_probe().

This helps in simplifing code and standardizing the error output.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/video/backlight/mp3309c.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/video/backlight/mp3309c.c b/drivers/video/backlight/mp3309c.c
index 762bd738c903..2d6bd1a180b3 100644
--- a/drivers/video/backlight/mp3309c.c
+++ b/drivers/video/backlight/mp3309c.c
@@ -208,10 +208,8 @@ static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
 	unsigned int num_levels, tmp_value;
 	struct device *dev = chip->dev;
 
-	if (!dev_fwnode(dev)) {
-		dev_err(dev, "failed to get firmware node\n");
-		return -ENODEV;
-	}
+	if (!dev_fwnode(dev))
+		return dev_err_probe(dev, -ENODEV, "failed to get firmware node\n");
 
 	/*
 	 * Dimming mode: the MP3309C provides two dimming control mode:
@@ -287,8 +285,7 @@ static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
 	if (ret)
 		pdata->default_brightness = pdata->max_brightness;
 	if (pdata->default_brightness > pdata->max_brightness) {
-		dev_err(chip->dev,
-			"default brightness exceeds max brightness\n");
+		dev_err_probe(dev, -ERANGE, "default brightness exceeds max brightness\n");
 		pdata->default_brightness = pdata->max_brightness;
 	}
 
@@ -329,16 +326,15 @@ static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
 
 static int mp3309c_probe(struct i2c_client *client)
 {
-	struct mp3309c_platform_data *pdata = dev_get_platdata(&client->dev);
+	struct device *dev = &client->dev;
+	struct mp3309c_platform_data *pdata = dev_get_platdata(dev);
 	struct mp3309c_chip *chip;
 	struct backlight_properties props;
 	struct pwm_state pwmstate;
 	int ret;
 
-	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
-		dev_err(&client->dev, "failed to check i2c functionality\n");
-		return -EOPNOTSUPP;
-	}
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+		return dev_err_probe(dev, -EOPNOTSUPP, "failed to check i2c functionality\n");
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
-- 
2.43.0.rc1.1.gbec44491f096

[PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for struct device

[Andy Shevchenko]

We have a temporary variable to keep pointer to struct device.
Utilise it where it makes sense.

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Tested-by: Flavio Suligoi <f.suligoi@asem.it>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/video/backlight/mp3309c.c | 30 ++++++++++++------------------
 1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/drivers/video/backlight/mp3309c.c b/drivers/video/backlight/mp3309c.c
index 2d6bd1a180b3..e7abefd175a4 100644
--- a/drivers/video/backlight/mp3309c.c
+++ b/drivers/video/backlight/mp3309c.c
@@ -222,10 +222,9 @@ static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
 	 */
 	pdata->dimming_mode = DIMMING_ANALOG_I2C;
 	if (device_property_present(dev, "pwms")) {
-		chip->pwmd = devm_pwm_get(chip->dev, NULL);
+		chip->pwmd = devm_pwm_get(dev, NULL);
 		if (IS_ERR(chip->pwmd))
-			return dev_err_probe(chip->dev, PTR_ERR(chip->pwmd),
-					     "error getting pwm data\n");
+			return dev_err_probe(dev, PTR_ERR(chip->pwmd), "error getting pwm data\n");
 		pdata->dimming_mode = DIMMING_PWM;
 		pwm_apply_args(chip->pwmd);
 	}
@@ -243,11 +242,9 @@ static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
 		num_levels = ANALOG_I2C_NUM_LEVELS;
 
 		/* Enable GPIO used in I2C dimming mode only */
-		chip->enable_gpio = devm_gpiod_get(chip->dev, "enable",
-						   GPIOD_OUT_HIGH);
+		chip->enable_gpio = devm_gpiod_get(dev, "enable", GPIOD_OUT_HIGH);
 		if (IS_ERR(chip->enable_gpio))
-			return dev_err_probe(chip->dev,
-					     PTR_ERR(chip->enable_gpio),
+			return dev_err_probe(dev, PTR_ERR(chip->enable_gpio),
 					     "error getting enable gpio\n");
 	} else {
 		/*
@@ -265,8 +262,7 @@ static int mp3309c_parse_fwnode(struct mp3309c_chip *chip,
 	}
 
 	/* Fill brightness levels array */
-	pdata->levels = devm_kcalloc(chip->dev, num_levels,
-				     sizeof(*pdata->levels), GFP_KERNEL);
+	pdata->levels = devm_kcalloc(dev, num_levels, sizeof(*pdata->levels), GFP_KERNEL);
 	if (!pdata->levels)
 		return -ENOMEM;
 	if (device_property_present(dev, "brightness-levels")) {
@@ -336,21 +332,21 @@ static int mp3309c_probe(struct i2c_client *client)
 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
 		return dev_err_probe(dev, -EOPNOTSUPP, "failed to check i2c functionality\n");
 
-	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
 		return -ENOMEM;
 
-	chip->dev = &client->dev;
+	chip->dev = dev;
 
 	chip->regmap = devm_regmap_init_i2c(client, &mp3309c_regmap);
 	if (IS_ERR(chip->regmap))
-		return dev_err_probe(&client->dev, PTR_ERR(chip->regmap),
+		return dev_err_probe(dev, PTR_ERR(chip->regmap),
 				     "failed to allocate register map\n");
 
 	i2c_set_clientdata(client, chip);
 
 	if (!pdata) {
-		pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
+		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
 		if (!pdata)
 			return -ENOMEM;
 
@@ -367,11 +363,10 @@ static int mp3309c_probe(struct i2c_client *client)
 	props.type = BACKLIGHT_RAW;
 	props.power = FB_BLANK_UNBLANK;
 	props.fb_blank = FB_BLANK_UNBLANK;
-	chip->bl = devm_backlight_device_register(chip->dev, "mp3309c",
-						  chip->dev, chip,
+	chip->bl = devm_backlight_device_register(dev, "mp3309c", dev, chip,
 						  &mp3309c_bl_ops, &props);
 	if (IS_ERR(chip->bl))
-		return dev_err_probe(chip->dev, PTR_ERR(chip->bl),
+		return dev_err_probe(dev, PTR_ERR(chip->bl),
 				     "error registering backlight device\n");
 
 	/* In PWM dimming mode, enable pwm device */
@@ -383,8 +378,7 @@ static int mp3309c_probe(struct i2c_client *client)
 		pwmstate.enabled = true;
 		ret = pwm_apply_state(chip->pwmd, &pwmstate);
 		if (ret)
-			return dev_err_probe(chip->dev, ret,
-					     "error setting pwm device\n");
+			return dev_err_probe(dev, ret, "error setting pwm device\n");
 	}
 
 	chip->pdata->status = FIRST_POWER_ON;
-- 
2.43.0.rc1.1.gbec44491f096

Re: [PATCH v2 1/3] backlight: mp3309c: Make use of device properties

[Daniel Thompson]

On Thu, Feb 01, 2024 at 05:14:13PM +0200, Andy Shevchenko wrote:
> Convert the module to be property provider agnostic and allow
> it to be used on non-OF platforms.
>
> Add mod_devicetable.h include.
>
> Tested-by: Flavio Suligoi <f.suligoi@asem.it>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.

Re: [PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()

[Daniel Thompson]

On Thu, Feb 01, 2024 at 05:14:14PM +0200, Andy Shevchenko wrote:
> Replace dev_err() with dev_err_probe().
>
> This helps in simplifing code and standardizing the error output.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>


Daniel.

RE: [PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()

[Flavio Suligoi]

Hi Andy,

> Replace dev_err() with dev_err_probe().
> 
> This helps in simplifing code and standardizing the error output.
> 
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

Tested-by: Flavio Suligoi <f.suligoi@asem.it>

Flavio

RE: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Flavio Suligoi]

Hi Andy,

...

> Subject: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF
> platforms
> 
> Allow to use driver on non-OF platforms and other cleanups.
> 
> Changelog v2:
> - rename pm3309c_parse_dt_node() --> mp3309c_parse_fwnode() (Daniel)
> - add tags (Daniel, Flavio)
> - new patch 2
> 
> Andy Shevchenko (3):
>   backlight: mp3309c: Make use of device properties
>   backlight: mp3309c: use dev_err_probe() instead of dev_err()
>   backlight: mp3309c: Utilise temporary variable for struct device
...
I've just tested again all your three patches (using the last 8.8.0-rc1 for-backlight-next )  on my board and all is ok.

Thanks,
Flavio

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Andy Shevchenko]

On Fri, Feb 02, 2024 at 10:52:32AM +0000, Flavio Suligoi wrote:

> > Andy Shevchenko (3):
> >   backlight: mp3309c: Make use of device properties
> >   backlight: mp3309c: use dev_err_probe() instead of dev_err()
> >   backlight: mp3309c: Utilise temporary variable for struct device

> I've just tested again all your three patches (using the last 8.8.0-rc1
> for-backlight-next )  on my board and all is ok.

Thank you!

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Lee Jones]

On Thu, 01 Feb 2024, Andy Shevchenko wrote:

> Allow to use driver on non-OF platforms and other cleanups.
> 
> Changelog v2:
> - rename pm3309c_parse_dt_node() --> mp3309c_parse_fwnode() (Daniel)
> - add tags (Daniel, Flavio)
> - new patch 2
> 
> Andy Shevchenko (3):
>   backlight: mp3309c: Make use of device properties
>   backlight: mp3309c: use dev_err_probe() instead of dev_err()
>   backlight: mp3309c: Utilise temporary variable for struct device
> 
>  drivers/video/backlight/mp3309c.c | 88 ++++++++++++-------------------
>  1 file changed, 35 insertions(+), 53 deletions(-)

Set no longer applies.  Please rebase, thanks.

-- 
Lee Jones [李琼斯]

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Lee Jones]

On Thu, 01 Feb 2024 17:14:12 +0200, Andy Shevchenko wrote:
> Allow to use driver on non-OF platforms and other cleanups.
> 
> Changelog v2:
> - rename pm3309c_parse_dt_node() --> mp3309c_parse_fwnode() (Daniel)
> - add tags (Daniel, Flavio)
> - new patch 2
> 
> [...]

Applied, thanks!

[1/3] backlight: mp3309c: Make use of device properties
      commit: e531c279ddee738260a94b2121836549ea167f63
[2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()
      commit: d991269f64928051c895151a8589dce806a92d9e
[3/3] backlight: mp3309c: Utilise temporary variable for struct device
      (no commit info)

--
Lee Jones [李琼斯]

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Andy Shevchenko]

On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> On Thu, 01 Feb 2024, Andy Shevchenko wrote:

...

> >   backlight: mp3309c: Utilise temporary variable for struct device

(1)

> Set no longer applies.  Please rebase, thanks.

I got a contradictory messages:
1) email that says that all had been applied;
2) this email (that tells the complete opposite);
3) the repository where the first two were applied.

While you can amend your scripts, I think I need to rebase only the last patch
(1) that may not be found in your tree currently.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Lee Jones]

On Thu, 08 Feb 2024, Andy Shevchenko wrote:

> On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> > On Thu, 01 Feb 2024, Andy Shevchenko wrote:
> 
> ...
> 
> > >   backlight: mp3309c: Utilise temporary variable for struct device
> 
> (1)
> 
> > Set no longer applies.  Please rebase, thanks.
> 
> I got a contradictory messages:
> 1) email that says that all had been applied;
> 2) this email (that tells the complete opposite);
> 3) the repository where the first two were applied.
> 
> While you can amend your scripts, I think I need to rebase only the last patch

This is what I assume happened:

1. Attempted to apply the set (as a set)
2. 2 commits applied cleanly
3. The final commit conflicted
4. I sent you a message to say that the set failed to apply
5. *** I forgot to remove the 2 successful patches ***
6. I applied another patch
7. b4 noticed the 2 patches that were applied and thanked you for them
8. *** I didn't notice that those tys were sent ***

No need to update the scripts. :)

> (1) that may not be found in your tree currently.

I'm going to remove the other ones now.  Please submit the set.

-- 
Lee Jones [李琼斯]

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Andy Shevchenko]

On Thu, Feb 08, 2024 at 05:39:46PM +0000, Lee Jones wrote:
> On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> > > On Thu, 01 Feb 2024, Andy Shevchenko wrote:

...

> > > >   backlight: mp3309c: Utilise temporary variable for struct device
> > 
> > (1)
> > 
> > > Set no longer applies.  Please rebase, thanks.
> > 
> > I got a contradictory messages:
> > 1) email that says that all had been applied;
> > 2) this email (that tells the complete opposite);
> > 3) the repository where the first two were applied.
> > 
> > While you can amend your scripts, I think I need to rebase only the last patch
> 
> This is what I assume happened:
> 
> 1. Attempted to apply the set (as a set)
> 2. 2 commits applied cleanly
> 3. The final commit conflicted

Which is really strange. I have just applied (with b4) on top of your changes
and no complains so far.

$ git am ./v2_20240201_andriy_shevchenko_backlight_mp3309c_allow_to_use_on_non_of_platforms.mbx
Applying: backlight: mp3309c: Make use of device properties
Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
Applying: backlight: mp3309c: Utilise temporary variable for struct device

Can you show what b4 tells you about this?

> 4. I sent you a message to say that the set failed to apply
> 5. *** I forgot to remove the 2 successful patches ***
> 6. I applied another patch
> 7. b4 noticed the 2 patches that were applied and thanked you for them
> 8. *** I didn't notice that those tys were sent ***
> 
> No need to update the scripts. :)
> 
> > (1) that may not be found in your tree currently.
> 
> I'm going to remove the other ones now.  Please submit the set.

I'll do, but I want to understand better what's going on.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Lee Jones]

On Thu, 08 Feb 2024, Andy Shevchenko wrote:

> On Thu, Feb 08, 2024 at 05:39:46PM +0000, Lee Jones wrote:
> > On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > > On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> > > > On Thu, 01 Feb 2024, Andy Shevchenko wrote:
> 
> ...
> 
> > > > >   backlight: mp3309c: Utilise temporary variable for struct device
> > > 
> > > (1)
> > > 
> > > > Set no longer applies.  Please rebase, thanks.
> > > 
> > > I got a contradictory messages:
> > > 1) email that says that all had been applied;
> > > 2) this email (that tells the complete opposite);
> > > 3) the repository where the first two were applied.
> > > 
> > > While you can amend your scripts, I think I need to rebase only the last patch
> > 
> > This is what I assume happened:
> > 
> > 1. Attempted to apply the set (as a set)
> > 2. 2 commits applied cleanly
> > 3. The final commit conflicted
> 
> Which is really strange. I have just applied (with b4) on top of your changes
> and no complains so far.
> 
> $ git am ./v2_20240201_andriy_shevchenko_backlight_mp3309c_allow_to_use_on_non_of_platforms.mbx
> Applying: backlight: mp3309c: Make use of device properties
> Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> Applying: backlight: mp3309c: Utilise temporary variable for struct device
> 
> Can you show what b4 tells you about this?

Fetching patch(es)
Analyzing 14 messages in the thread
Checking attestation on all messages, may take a moment...
---
  ✓ [PATCH v2 1/3] backlight: mp3309c: Make use of device properties
    + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
    + Link: https://lore.kernel.org/r/20240201151537.367218-2-andriy.shevchenko@linux.intel.com
    + Signed-off-by: Lee Jones <lee@kernel.org>
  ✓ [PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()
    + Tested-by: Flavio Suligoi <f.suligoi@asem.it> (✗ DKIM/asem.it)
    + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
    + Link: https://lore.kernel.org/r/20240201151537.367218-3-andriy.shevchenko@linux.intel.com
    + Signed-off-by: Lee Jones <lee@kernel.org>
  ✓ [PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for struct device
    + Link: https://lore.kernel.org/r/20240201151537.367218-4-andriy.shevchenko@linux.intel.com
    + Signed-off-by: Lee Jones <lee@kernel.org>
  ---
  ✓ Signed: DKIM/intel.com (From: andriy.shevchenko@linux.intel.com)
---
Total patches: 3
Prepared a fake commit range for 3-way merge (672ecc5199b5..d507b9f4c5b9)
---
 Link: https://lore.kernel.org/r/20240201151537.367218-1-andriy.shevchenko@linux.intel.com
 Base: not specified

Running through checkpatch.pl
total: 0 errors, 0 warnings, 103 lines checked

"[PATCH v2 1/3] backlight: mp3309c: Make use of device properties" has no obvious style problems and is ready for submission.
total: 0 errors, 0 warnings, 41 lines checked

"[PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of" has no obvious style problems and is ready for submission.
total: 0 errors, 0 warnings, 81 lines checked

"[PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for" has no obvious style problems and is ready for submission.

Check the results (hit return to continue or Ctrl+c to exit)


Applying patch(es)
Applying: backlight: mp3309c: Make use of device properties
Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
Applying: backlight: mp3309c: Utilise temporary variable for struct device
Using index info to reconstruct a base tree...
M	drivers/video/backlight/mp3309c.c
Checking patch drivers/video/backlight/mp3309c.c...
Applied patch drivers/video/backlight/mp3309c.c cleanly.
Falling back to patching base and 3-way merge...
error: Your local changes to the following files would be overwritten by merge:
	drivers/video/backlight/mp3309c.c
Please commit your changes or stash them before you merge.
Aborting
error: Failed to merge in the changes.
Patch failed at 0003 backlight: mp3309c: Utilise temporary variable for struct device
hint: Use 'git am --show-current-patch=diff' to see the failed patch
When you have resolved this problem, run "git am --continue".
If you prefer to skip this patch, run "git am --skip" instead.
To restore the original branch and stop patching, run "git am --abort".

-- 
Lee Jones [李琼斯]

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Andy Shevchenko]

On Thu, Feb 08, 2024 at 06:14:55PM +0000, Lee Jones wrote:
> On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > On Thu, Feb 08, 2024 at 05:39:46PM +0000, Lee Jones wrote:
> > > On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > > > On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> > > > > On Thu, 01 Feb 2024, Andy Shevchenko wrote:

...

> > > > > >   backlight: mp3309c: Utilise temporary variable for struct device
> > > > 
> > > > (1)
> > > > 
> > > > > Set no longer applies.  Please rebase, thanks.
> > > > 
> > > > I got a contradictory messages:
> > > > 1) email that says that all had been applied;
> > > > 2) this email (that tells the complete opposite);
> > > > 3) the repository where the first two were applied.
> > > > 
> > > > While you can amend your scripts, I think I need to rebase only the last patch
> > > 
> > > This is what I assume happened:
> > > 
> > > 1. Attempted to apply the set (as a set)
> > > 2. 2 commits applied cleanly
> > > 3. The final commit conflicted
> > 
> > Which is really strange. I have just applied (with b4) on top of your changes
> > and no complains so far.
> > 
> > $ git am ./v2_20240201_andriy_shevchenko_backlight_mp3309c_allow_to_use_on_non_of_platforms.mbx
> > Applying: backlight: mp3309c: Make use of device properties
> > Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> > Applying: backlight: mp3309c: Utilise temporary variable for struct device
> > 
> > Can you show what b4 tells you about this?
> 
> Fetching patch(es)
> Analyzing 14 messages in the thread
> Checking attestation on all messages, may take a moment...
> ---
>   ✓ [PATCH v2 1/3] backlight: mp3309c: Make use of device properties
>     + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
>     + Link: https://lore.kernel.org/r/20240201151537.367218-2-andriy.shevchenko@linux.intel.com
>     + Signed-off-by: Lee Jones <lee@kernel.org>
>   ✓ [PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()
>     + Tested-by: Flavio Suligoi <f.suligoi@asem.it> (✗ DKIM/asem.it)
>     + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
>     + Link: https://lore.kernel.org/r/20240201151537.367218-3-andriy.shevchenko@linux.intel.com
>     + Signed-off-by: Lee Jones <lee@kernel.org>
>   ✓ [PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for struct device
>     + Link: https://lore.kernel.org/r/20240201151537.367218-4-andriy.shevchenko@linux.intel.com
>     + Signed-off-by: Lee Jones <lee@kernel.org>
>   ---
>   ✓ Signed: DKIM/intel.com (From: andriy.shevchenko@linux.intel.com)
> ---
> Total patches: 3
> Prepared a fake commit range for 3-way merge (672ecc5199b5..d507b9f4c5b9)
> ---
>  Link: https://lore.kernel.org/r/20240201151537.367218-1-andriy.shevchenko@linux.intel.com
>  Base: not specified
> 
> Running through checkpatch.pl
> total: 0 errors, 0 warnings, 103 lines checked
> 
> "[PATCH v2 1/3] backlight: mp3309c: Make use of device properties" has no obvious style problems and is ready for submission.
> total: 0 errors, 0 warnings, 41 lines checked
> 
> "[PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of" has no obvious style problems and is ready for submission.
> total: 0 errors, 0 warnings, 81 lines checked
> 
> "[PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for" has no obvious style problems and is ready for submission.
> 
> Check the results (hit return to continue or Ctrl+c to exit)
> 
> 
> Applying patch(es)
> Applying: backlight: mp3309c: Make use of device properties
> Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> Applying: backlight: mp3309c: Utilise temporary variable for struct device
> Using index info to reconstruct a base tree...
> M	drivers/video/backlight/mp3309c.c
> Checking patch drivers/video/backlight/mp3309c.c...
> Applied patch drivers/video/backlight/mp3309c.c cleanly.
> Falling back to patching base and 3-way merge...
> error: Your local changes to the following files would be overwritten by merge:
> 	drivers/video/backlight/mp3309c.c
> Please commit your changes or stash them before you merge.
> Aborting
> error: Failed to merge in the changes.
> Patch failed at 0003 backlight: mp3309c: Utilise temporary variable for struct device
> hint: Use 'git am --show-current-patch=diff' to see the failed patch
> When you have resolved this problem, run "git am --continue".
> If you prefer to skip this patch, run "git am --skip" instead.
> To restore the original branch and stop patching, run "git am --abort".

Thank you!

It seems I have reduced context, so if you do `git am -C2 ...` it should apply.
Never mind, I'll send a new version which should work with -C3.

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Lee Jones]

On Thu, 08 Feb 2024, Andy Shevchenko wrote:

> On Thu, Feb 08, 2024 at 06:14:55PM +0000, Lee Jones wrote:
> > On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > > On Thu, Feb 08, 2024 at 05:39:46PM +0000, Lee Jones wrote:
> > > > On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > > > > On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> > > > > > On Thu, 01 Feb 2024, Andy Shevchenko wrote:
> 
> ...
> 
> > > > > > >   backlight: mp3309c: Utilise temporary variable for struct device
> > > > > 
> > > > > (1)
> > > > > 
> > > > > > Set no longer applies.  Please rebase, thanks.
> > > > > 
> > > > > I got a contradictory messages:
> > > > > 1) email that says that all had been applied;
> > > > > 2) this email (that tells the complete opposite);
> > > > > 3) the repository where the first two were applied.
> > > > > 
> > > > > While you can amend your scripts, I think I need to rebase only the last patch
> > > > 
> > > > This is what I assume happened:
> > > > 
> > > > 1. Attempted to apply the set (as a set)
> > > > 2. 2 commits applied cleanly
> > > > 3. The final commit conflicted
> > > 
> > > Which is really strange. I have just applied (with b4) on top of your changes
> > > and no complains so far.
> > > 
> > > $ git am ./v2_20240201_andriy_shevchenko_backlight_mp3309c_allow_to_use_on_non_of_platforms.mbx
> > > Applying: backlight: mp3309c: Make use of device properties
> > > Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> > > Applying: backlight: mp3309c: Utilise temporary variable for struct device
> > > 
> > > Can you show what b4 tells you about this?
> > 
> > Fetching patch(es)
> > Analyzing 14 messages in the thread
> > Checking attestation on all messages, may take a moment...
> > ---
> >   ✓ [PATCH v2 1/3] backlight: mp3309c: Make use of device properties
> >     + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
> >     + Link: https://lore.kernel.org/r/20240201151537.367218-2-andriy.shevchenko@linux.intel.com
> >     + Signed-off-by: Lee Jones <lee@kernel.org>
> >   ✓ [PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()
> >     + Tested-by: Flavio Suligoi <f.suligoi@asem.it> (✗ DKIM/asem.it)
> >     + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
> >     + Link: https://lore.kernel.org/r/20240201151537.367218-3-andriy.shevchenko@linux.intel.com
> >     + Signed-off-by: Lee Jones <lee@kernel.org>
> >   ✓ [PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for struct device
> >     + Link: https://lore.kernel.org/r/20240201151537.367218-4-andriy.shevchenko@linux.intel.com
> >     + Signed-off-by: Lee Jones <lee@kernel.org>
> >   ---
> >   ✓ Signed: DKIM/intel.com (From: andriy.shevchenko@linux.intel.com)
> > ---
> > Total patches: 3
> > Prepared a fake commit range for 3-way merge (672ecc5199b5..d507b9f4c5b9)
> > ---
> >  Link: https://lore.kernel.org/r/20240201151537.367218-1-andriy.shevchenko@linux.intel.com
> >  Base: not specified
> > 
> > Running through checkpatch.pl
> > total: 0 errors, 0 warnings, 103 lines checked
> > 
> > "[PATCH v2 1/3] backlight: mp3309c: Make use of device properties" has no obvious style problems and is ready for submission.
> > total: 0 errors, 0 warnings, 41 lines checked
> > 
> > "[PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of" has no obvious style problems and is ready for submission.
> > total: 0 errors, 0 warnings, 81 lines checked
> > 
> > "[PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for" has no obvious style problems and is ready for submission.
> > 
> > Check the results (hit return to continue or Ctrl+c to exit)
> > 
> > 
> > Applying patch(es)
> > Applying: backlight: mp3309c: Make use of device properties
> > Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> > Applying: backlight: mp3309c: Utilise temporary variable for struct device
> > Using index info to reconstruct a base tree...
> > M	drivers/video/backlight/mp3309c.c
> > Checking patch drivers/video/backlight/mp3309c.c...
> > Applied patch drivers/video/backlight/mp3309c.c cleanly.
> > Falling back to patching base and 3-way merge...
> > error: Your local changes to the following files would be overwritten by merge:
> > 	drivers/video/backlight/mp3309c.c
> > Please commit your changes or stash them before you merge.
> > Aborting
> > error: Failed to merge in the changes.
> > Patch failed at 0003 backlight: mp3309c: Utilise temporary variable for struct device
> > hint: Use 'git am --show-current-patch=diff' to see the failed patch
> > When you have resolved this problem, run "git am --continue".
> > If you prefer to skip this patch, run "git am --skip" instead.
> > To restore the original branch and stop patching, run "git am --abort".
> 
> Thank you!
> 
> It seems I have reduced context, so if you do `git am -C2 ...` it should apply.
> Never mind, I'll send a new version which should work with -C3.

I just use the default matching context lines.

Do you have a special config that reduces you context in patches?

-- 
Lee Jones [李琼斯]

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Andy Shevchenko]

On Fri, Feb 09, 2024 at 07:50:52AM +0000, Lee Jones wrote:
> On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > On Thu, Feb 08, 2024 at 06:14:55PM +0000, Lee Jones wrote:
> > > On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > > > On Thu, Feb 08, 2024 at 05:39:46PM +0000, Lee Jones wrote:
> > > > > On Thu, 08 Feb 2024, Andy Shevchenko wrote:
> > > > > > On Thu, Feb 08, 2024 at 11:34:25AM +0000, Lee Jones wrote:
> > > > > > > On Thu, 01 Feb 2024, Andy Shevchenko wrote:

...

> > > > > > > >   backlight: mp3309c: Utilise temporary variable for struct device
> > > > > > 
> > > > > > (1)
> > > > > > 
> > > > > > > Set no longer applies.  Please rebase, thanks.
> > > > > > 
> > > > > > I got a contradictory messages:
> > > > > > 1) email that says that all had been applied;
> > > > > > 2) this email (that tells the complete opposite);
> > > > > > 3) the repository where the first two were applied.
> > > > > > 
> > > > > > While you can amend your scripts, I think I need to rebase only the last patch
> > > > > 
> > > > > This is what I assume happened:
> > > > > 
> > > > > 1. Attempted to apply the set (as a set)
> > > > > 2. 2 commits applied cleanly
> > > > > 3. The final commit conflicted
> > > > 
> > > > Which is really strange. I have just applied (with b4) on top of your changes
> > > > and no complains so far.
> > > > 
> > > > $ git am ./v2_20240201_andriy_shevchenko_backlight_mp3309c_allow_to_use_on_non_of_platforms.mbx
> > > > Applying: backlight: mp3309c: Make use of device properties
> > > > Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> > > > Applying: backlight: mp3309c: Utilise temporary variable for struct device
> > > > 
> > > > Can you show what b4 tells you about this?
> > > 
> > > Fetching patch(es)
> > > Analyzing 14 messages in the thread
> > > Checking attestation on all messages, may take a moment...
> > > ---
> > >   ✓ [PATCH v2 1/3] backlight: mp3309c: Make use of device properties
> > >     + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
> > >     + Link: https://lore.kernel.org/r/20240201151537.367218-2-andriy.shevchenko@linux.intel.com
> > >     + Signed-off-by: Lee Jones <lee@kernel.org>
> > >   ✓ [PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()
> > >     + Tested-by: Flavio Suligoi <f.suligoi@asem.it> (✗ DKIM/asem.it)
> > >     + Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> (✓ DKIM/linaro.org)
> > >     + Link: https://lore.kernel.org/r/20240201151537.367218-3-andriy.shevchenko@linux.intel.com
> > >     + Signed-off-by: Lee Jones <lee@kernel.org>
> > >   ✓ [PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for struct device
> > >     + Link: https://lore.kernel.org/r/20240201151537.367218-4-andriy.shevchenko@linux.intel.com
> > >     + Signed-off-by: Lee Jones <lee@kernel.org>
> > >   ---
> > >   ✓ Signed: DKIM/intel.com (From: andriy.shevchenko@linux.intel.com)
> > > ---
> > > Total patches: 3
> > > Prepared a fake commit range for 3-way merge (672ecc5199b5..d507b9f4c5b9)
> > > ---
> > >  Link: https://lore.kernel.org/r/20240201151537.367218-1-andriy.shevchenko@linux.intel.com
> > >  Base: not specified
> > > 
> > > Running through checkpatch.pl
> > > total: 0 errors, 0 warnings, 103 lines checked
> > > 
> > > "[PATCH v2 1/3] backlight: mp3309c: Make use of device properties" has no obvious style problems and is ready for submission.
> > > total: 0 errors, 0 warnings, 41 lines checked
> > > 
> > > "[PATCH v2 2/3] backlight: mp3309c: use dev_err_probe() instead of" has no obvious style problems and is ready for submission.
> > > total: 0 errors, 0 warnings, 81 lines checked
> > > 
> > > "[PATCH v2 3/3] backlight: mp3309c: Utilise temporary variable for" has no obvious style problems and is ready for submission.
> > > 
> > > Check the results (hit return to continue or Ctrl+c to exit)
> > > 
> > > 
> > > Applying patch(es)
> > > Applying: backlight: mp3309c: Make use of device properties
> > > Applying: backlight: mp3309c: use dev_err_probe() instead of dev_err()
> > > Applying: backlight: mp3309c: Utilise temporary variable for struct device
> > > Using index info to reconstruct a base tree...
> > > M	drivers/video/backlight/mp3309c.c
> > > Checking patch drivers/video/backlight/mp3309c.c...
> > > Applied patch drivers/video/backlight/mp3309c.c cleanly.
> > > Falling back to patching base and 3-way merge...
> > > error: Your local changes to the following files would be overwritten by merge:
> > > 	drivers/video/backlight/mp3309c.c
> > > Please commit your changes or stash them before you merge.
> > > Aborting
> > > error: Failed to merge in the changes.
> > > Patch failed at 0003 backlight: mp3309c: Utilise temporary variable for struct device
> > > hint: Use 'git am --show-current-patch=diff' to see the failed patch
> > > When you have resolved this problem, run "git am --continue".
> > > If you prefer to skip this patch, run "git am --skip" instead.
> > > To restore the original branch and stop patching, run "git am --abort".
> > 
> > Thank you!
> > 
> > It seems I have reduced context, so if you do `git am -C2 ...` it should apply.
> > Never mind, I'll send a new version which should work with -C3.
> 
> I just use the default matching context lines.
> 
> Do you have a special config that reduces you context in patches?

No special config, but can be done via aliasing (through function)
E.g.,
	git() {
		if [ "$1" = 'am' ]; then
			shift
			/usr/bin/git am -C1 "$@"
		else
			/usr/bin/git "$@"
		fi
	}

-- 
With Best Regards,
Andy Shevchenko

Re: [PATCH v2 0/3] backlight: mp3309c: Allow to use on non-OF platforms

[Lee Jones]

On Thu, 01 Feb 2024 17:14:12 +0200, Andy Shevchenko wrote:
> Allow to use driver on non-OF platforms and other cleanups.
> 
> Changelog v2:
> - rename pm3309c_parse_dt_node() --> mp3309c_parse_fwnode() (Daniel)
> - add tags (Daniel, Flavio)
> - new patch 2
> 
> [...]

Applied, thanks!

[1/3] backlight: mp3309c: Make use of device properties
      commit: b6fc7e62a7afc3709b31f6779665c7fc4a7755d7
[2/3] backlight: mp3309c: use dev_err_probe() instead of dev_err()
      (no commit info)
[3/3] backlight: mp3309c: Utilise temporary variable for struct device
      (no commit info)

--
Lee Jones [李琼斯]