[PATCH v2 0/2] rtc: convert two drivers to devm_i2c_new_dummy_device()

[PATCH v2 0/2] rtc: convert two drivers to devm_i2c_new_dummy_device()

[Wolfram Sang]

I was about to simplify the call to i2c_unregister_device() when I
realized that converting to devm_i2c_new_dummy_device() will simplify
the drivers a lot. So I took this approach.

Only build tested, but visually reviewed multiple times.

Change since V1:

* rebased to rtc-next

Wolfram Sang (2):
  rtc: max77686: convert to devm_i2c_new_dummy_device()
  rtc: s35390a: convert to devm_i2c_new_dummy_device()

 drivers/rtc/rtc-max77686.c | 17 +++---------
 drivers/rtc/rtc-s35390a.c  | 54 +++++++++-----------------------------
 2 files changed, 17 insertions(+), 54 deletions(-)

-- 
2.20.1

[PATCH v2 1/2] rtc: max77686: convert to devm_i2c_new_dummy_device()

[Wolfram Sang]

I was about to simplify the call to i2c_unregister_device() when I
realized that converting to devm_i2c_new_dummy_device() will simplify
the driver a lot. So I took this approach.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/rtc/rtc-max77686.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 7a98e0744878..d5a0e27dd0a0 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -690,8 +690,8 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
 		goto add_rtc_irq;
 	}
 
-	info->rtc = i2c_new_dummy_device(parent_i2c->adapter,
-					 info->drv_data->rtc_i2c_addr);
+	info->rtc = devm_i2c_new_dummy_device(info->dev, parent_i2c->adapter,
+					      info->drv_data->rtc_i2c_addr);
 	if (IS_ERR(info->rtc)) {
 		dev_err(info->dev, "Failed to allocate I2C device for RTC\n");
 		return PTR_ERR(info->rtc);
@@ -702,7 +702,7 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
 	if (IS_ERR(info->rtc_regmap)) {
 		ret = PTR_ERR(info->rtc_regmap);
 		dev_err(info->dev, "Failed to allocate RTC regmap: %d\n", ret);
-		goto err_unregister_i2c;
+		return ret;
 	}
 
 add_rtc_irq:
@@ -712,15 +712,10 @@ static int max77686_init_rtc_regmap(struct max77686_rtc_info *info)
 				  &info->rtc_irq_data);
 	if (ret < 0) {
 		dev_err(info->dev, "Failed to add RTC irq chip: %d\n", ret);
-		goto err_unregister_i2c;
+		return ret;
 	}
 
 	return 0;
-
-err_unregister_i2c:
-	if (info->rtc)
-		i2c_unregister_device(info->rtc);
-	return ret;
 }
 
 static int max77686_rtc_probe(struct platform_device *pdev)
@@ -783,8 +778,6 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 
 err_rtc:
 	regmap_del_irq_chip(info->rtc_irq, info->rtc_irq_data);
-	if (info->rtc)
-		i2c_unregister_device(info->rtc);
 
 	return ret;
 }
@@ -795,8 +788,6 @@ static int max77686_rtc_remove(struct platform_device *pdev)
 
 	free_irq(info->virq, info);
 	regmap_del_irq_chip(info->rtc_irq, info->rtc_irq_data);
-	if (info->rtc)
-		i2c_unregister_device(info->rtc);
 
 	return 0;
 }
-- 
2.20.1

[PATCH v2 2/2] rtc: s35390a: convert to devm_i2c_new_dummy_device()

[Wolfram Sang]

I was about to simplify the call to i2c_unregister_device() when I
realized that converting to devm_i2c_new_dummy_device() will simplify
the driver a lot. So I took this approach.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
---
 drivers/rtc/rtc-s35390a.c | 54 ++++++++++-----------------------------
 1 file changed, 13 insertions(+), 41 deletions(-)

diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index d773fd597bd5..da34cfd70f95 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -434,37 +434,32 @@ static int s35390a_probe(struct i2c_client *client,
 	char buf, status1;
 	struct device *dev = &client->dev;
 
-	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
-		err = -ENODEV;
-		goto exit;
-	}
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+		return -ENODEV;
 
 	s35390a = devm_kzalloc(dev, sizeof(struct s35390a), GFP_KERNEL);
-	if (!s35390a) {
-		err = -ENOMEM;
-		goto exit;
-	}
+	if (!s35390a)
+		return -ENOMEM;
 
 	s35390a->client[0] = client;
 	i2c_set_clientdata(client, s35390a);
 
 	/* This chip uses multiple addresses, use dummy devices for them */
 	for (i = 1; i < 8; ++i) {
-		s35390a->client[i] = i2c_new_dummy_device(client->adapter,
-							  client->addr + i);
+		s35390a->client[i] = devm_i2c_new_dummy_device(dev,
+							       client->adapter,
+							       client->addr + i);
 		if (IS_ERR(s35390a->client[i])) {
 			dev_err(dev, "Address %02x unavailable\n",
 				client->addr + i);
-			err = PTR_ERR(s35390a->client[i]);
-			goto exit_dummy;
+			return PTR_ERR(s35390a->client[i]);
 		}
 	}
 
 	err_read = s35390a_read_status(s35390a, &status1);
 	if (err_read < 0) {
-		err = err_read;
 		dev_err(dev, "error resetting chip\n");
-		goto exit_dummy;
+		return err_read;
 	}
 
 	if (status1 & S35390A_FLAG_24H)
@@ -478,13 +473,13 @@ static int s35390a_probe(struct i2c_client *client,
 		err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &buf, 1);
 		if (err < 0) {
 			dev_err(dev, "error disabling alarm");
-			goto exit_dummy;
+			return err;
 		}
 	} else {
 		err = s35390a_disable_test_mode(s35390a);
 		if (err < 0) {
 			dev_err(dev, "error disabling test mode\n");
-			goto exit_dummy;
+			return err;
 		}
 	}
 
@@ -493,10 +488,8 @@ static int s35390a_probe(struct i2c_client *client,
 	s35390a->rtc = devm_rtc_device_register(dev, s35390a_driver.driver.name,
 						&s35390a_rtc_ops, THIS_MODULE);
 
-	if (IS_ERR(s35390a->rtc)) {
-		err = PTR_ERR(s35390a->rtc);
-		goto exit_dummy;
-	}
+	if (IS_ERR(s35390a->rtc))
+		return PTR_ERR(s35390a->rtc);
 
 	/* supports per-minute alarms only, therefore set uie_unsupported */
 	s35390a->rtc->uie_unsupported = 1;
@@ -505,26 +498,6 @@ static int s35390a_probe(struct i2c_client *client,
 		rtc_update_irq(s35390a->rtc, 1, RTC_AF);
 
 	return 0;
-
-exit_dummy:
-	for (i = 1; i < 8; ++i)
-		if (s35390a->client[i])
-			i2c_unregister_device(s35390a->client[i]);
-
-exit:
-	return err;
-}
-
-static int s35390a_remove(struct i2c_client *client)
-{
-	unsigned int i;
-	struct s35390a *s35390a = i2c_get_clientdata(client);
-
-	for (i = 1; i < 8; ++i)
-		if (s35390a->client[i])
-			i2c_unregister_device(s35390a->client[i]);
-
-	return 0;
 }
 
 static struct i2c_driver s35390a_driver = {
@@ -533,7 +506,6 @@ static struct i2c_driver s35390a_driver = {
 		.of_match_table = of_match_ptr(s35390a_of_match),
 	},
 	.probe		= s35390a_probe,
-	.remove		= s35390a_remove,
 	.id_table	= s35390a_id,
 };
 
-- 
2.20.1

Re: [PATCH v2 1/2] rtc: max77686: convert to devm_i2c_new_dummy_device()

[Alexandre Belloni]

On 30/08/2019 15:31:23+0200, Wolfram Sang wrote:
> I was about to simplify the call to i2c_unregister_device() when I
> realized that converting to devm_i2c_new_dummy_device() will simplify
> the driver a lot. So I took this approach.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
>  drivers/rtc/rtc-max77686.c | 17 ++++-------------
>  1 file changed, 4 insertions(+), 13 deletions(-)
> 
Applied, thanks.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

Re: [PATCH v2 2/2] rtc: s35390a: convert to devm_i2c_new_dummy_device()

[Alexandre Belloni]

On 30/08/2019 15:31:24+0200, Wolfram Sang wrote:
> I was about to simplify the call to i2c_unregister_device() when I
> realized that converting to devm_i2c_new_dummy_device() will simplify
> the driver a lot. So I took this approach.
> 
> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
> ---
>  drivers/rtc/rtc-s35390a.c | 54 ++++++++++-----------------------------
>  1 file changed, 13 insertions(+), 41 deletions(-)
> 
Applied, thanks.

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com