mfd: rohm: Use dev_err_probe()

The dev_err_probe() has (at least) following benefits over dev_err()
when printing an error print for a failed function call at a device
driver probe:
	- Omit error level print if error is 'EPRBE_DEFER'
	- Standardized print format for returned error
	- return the error value allowing shortening calls like:

	if (ret) {
		dev_err(...);
		return ret;
	}

	to

	if (ret)
		return dev_err_probe(...);

Convert the ROHM BD71828, ROHM BD718x7 and ROHM BD9576 core drivers to
use the dev_err_probe() when returned error is not hard-coded constant.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/Y33lte0PKd2u6dyR@fedora

drivers/mfd/rohm-bd71828.c

@@ -513,27 +513,24 @@ static int bd71828_i2c_probe(struct i2c_client *i2c)
 	}
 
 	regmap = devm_regmap_init_i2c(i2c, regmap_config);
-	if (IS_ERR(regmap)) {
-		dev_err(&i2c->dev, "Failed to initialize Regmap\n");
-		return PTR_ERR(regmap);
-	}
+	if (IS_ERR(regmap))
+		return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
+				     "Failed to initialize Regmap\n");
 
 	ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
 				       IRQF_ONESHOT, 0, irqchip, &irq_data);
-	if (ret) {
-		dev_err(&i2c->dev, "Failed to add IRQ chip\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&i2c->dev, ret,
+				     "Failed to add IRQ chip\n");
 
 	dev_dbg(&i2c->dev, "Registered %d IRQs for chip\n",
 		irqchip->num_irqs);
 
 	if (button_irq) {
 		ret = regmap_irq_get_virq(irq_data, button_irq);
-		if (ret < 0) {
-			dev_err(&i2c->dev, "Failed to get the power-key IRQ\n");
-			return ret;
-		}
+		if (ret < 0)
+			return dev_err_probe(&i2c->dev, ret,
+					     "Failed to get the power-key IRQ\n");
 
 		button.irq = ret;
 	}
@@ -545,7 +542,7 @@ static int bd71828_i2c_probe(struct i2c_client *i2c)
 	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, mfd, cells,
 				   NULL, 0, regmap_irq_get_domain(irq_data));
 	if (ret)
-		dev_err(&i2c->dev, "Failed to create subdevices\n");
+		dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n");
 
 	return ret;
 }

drivers/mfd/rohm-bd718x7.c

@@ -156,18 +156,15 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c)
 	}
 
 	regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config);
-	if (IS_ERR(regmap)) {
-		dev_err(&i2c->dev, "regmap initialization failed\n");
-		return PTR_ERR(regmap);
-	}
+	if (IS_ERR(regmap))
+		return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
+				     "regmap initialization failed\n");
 
 	ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
 				       IRQF_ONESHOT, 0, &bd718xx_irq_chip,
 				       &irq_data);
-	if (ret) {
-		dev_err(&i2c->dev, "Failed to add irq_chip\n");
-		return ret;
-	}
+	if (ret)
+		return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n");
 
 	ret = bd718xx_init_press_duration(regmap, &i2c->dev);
 	if (ret)
@@ -175,10 +172,8 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c)
 
 	ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S);
 
-	if (ret < 0) {
-		dev_err(&i2c->dev, "Failed to get the IRQ\n");
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(&i2c->dev, ret, "Failed to get the IRQ\n");
 
 	button.irq = ret;
 
@@ -186,7 +181,7 @@ static int bd718xx_i2c_probe(struct i2c_client *i2c)
 				   mfd, cells, NULL, 0,
 				   regmap_irq_get_domain(irq_data));
 	if (ret)
-		dev_err(&i2c->dev, "Failed to create subdevices\n");
+		dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n");
 
 	return ret;
 }

drivers/mfd/rohm-bd9576.c

@@ -121,10 +121,9 @@ static int bd957x_i2c_probe(struct i2c_client *i2c)
 	}
 
 	regmap = devm_regmap_init_i2c(i2c, &bd957x_regmap);
-	if (IS_ERR(regmap)) {
-		dev_err(&i2c->dev, "Failed to initialize Regmap\n");
-		return PTR_ERR(regmap);
-	}
+	if (IS_ERR(regmap))
+		return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
+				     "Failed to initialize Regmap\n");
 
 	/*
 	 * BD9576 behaves badly. It kepts IRQ line asserted for the whole
@@ -145,10 +144,10 @@ static int bd957x_i2c_probe(struct i2c_client *i2c)
 		ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
 					       IRQF_ONESHOT, 0,
 					       &bd9576_irq_chip, &irq_data);
-		if (ret) {
-			dev_err(&i2c->dev, "Failed to add IRQ chip\n");
-			return ret;
-		}
+		if (ret)
+			return dev_err_probe(&i2c->dev, ret,
+					     "Failed to add IRQ chip\n");
+
 		domain = regmap_irq_get_domain(irq_data);
 	} else {
 		ret = regmap_update_bits(regmap, BD957X_REG_INT_MAIN_MASK,
@@ -162,7 +161,7 @@ static int bd957x_i2c_probe(struct i2c_client *i2c)
 	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, cells,
 				   num_cells, NULL, 0, domain);
 	if (ret)
-		dev_err(&i2c->dev, "Failed to create subdevices\n");
+		dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n");
 
 	return ret;
 }