siox: bus-gpio: Simplify using devm_siox_* functions

With the devm variant of siox_master_allocate() and
siox_master_register() the remove callback can be dropped. This also
simplifies the error paths in the probe function.
Acked-by: Thorsten Scherer <t.scherer@eckelmann.de>
Link: https://lore.kernel.org/r/e3c598de536deadc7efef9c21ccb49d31eb240a9.1708328466.git.u.kleine-koenig@pengutronix.deSigned-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

drivers/siox/siox-bus-gpio.c

@@ -91,65 +91,42 @@ static int siox_gpio_probe(struct platform_device *pdev)
 	int ret;
 	struct siox_master *smaster;
 
-	smaster = siox_master_alloc(&pdev->dev, sizeof(*ddata));
-	if (!smaster) {
-		dev_err(dev, "failed to allocate siox master\n");
-		return -ENOMEM;
-	}
+	smaster = devm_siox_master_alloc(dev, sizeof(*ddata));
+	if (!smaster)
+		return dev_err_probe(dev, -ENOMEM,
+				     "failed to allocate siox master\n");
 
 	platform_set_drvdata(pdev, smaster);
 	ddata = siox_master_get_devdata(smaster);
 
 	ddata->din = devm_gpiod_get(dev, "din", GPIOD_IN);
-	if (IS_ERR(ddata->din)) {
-		ret = dev_err_probe(dev, PTR_ERR(ddata->din),
-				    "Failed to get din GPIO\n");
-		goto err;
-	}
+	if (IS_ERR(ddata->din))
+		return dev_err_probe(dev, PTR_ERR(ddata->din),
+				     "Failed to get din GPIO\n");
 
 	ddata->dout = devm_gpiod_get(dev, "dout", GPIOD_OUT_LOW);
-	if (IS_ERR(ddata->dout)) {
-		ret = dev_err_probe(dev, PTR_ERR(ddata->dout),
-				    "Failed to get dout GPIO\n");
-		goto err;
-	}
+	if (IS_ERR(ddata->dout))
+		return dev_err_probe(dev, PTR_ERR(ddata->dout),
+				     "Failed to get dout GPIO\n");
 
 	ddata->dclk = devm_gpiod_get(dev, "dclk", GPIOD_OUT_LOW);
-	if (IS_ERR(ddata->dclk)) {
-		ret = dev_err_probe(dev, PTR_ERR(ddata->dclk),
-				    "Failed to get dclk GPIO\n");
-		goto err;
-	}
+	if (IS_ERR(ddata->dclk))
+		return dev_err_probe(dev, PTR_ERR(ddata->dclk),
+				     "Failed to get dclk GPIO\n");
 
 	ddata->dld = devm_gpiod_get(dev, "dld", GPIOD_OUT_LOW);
-	if (IS_ERR(ddata->dld)) {
-		ret = dev_err_probe(dev, PTR_ERR(ddata->dld),
-				    "Failed to get dld GPIO\n");
-		goto err;
-	}
+	if (IS_ERR(ddata->dld))
+		return dev_err_probe(dev, PTR_ERR(ddata->dld),
+				     "Failed to get dld GPIO\n");
 
 	smaster->pushpull = siox_gpio_pushpull;
 	/* XXX: determine automatically like spi does */
 	smaster->busno = 0;
 
-	ret = siox_master_register(smaster);
-	if (ret) {
-		dev_err_probe(dev, ret,
-			      "Failed to register siox master\n");
-err:
-		siox_master_put(smaster);
-	}
-
-	return ret;
-}
-
-static int siox_gpio_remove(struct platform_device *pdev)
-{
-	struct siox_master *master = platform_get_drvdata(pdev);
-
-	siox_master_unregister(master);
-
-	siox_master_put(master);
+	ret = devm_siox_master_register(dev, smaster);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to register siox master\n");
 
 	return 0;
 }
@@ -162,7 +139,6 @@ MODULE_DEVICE_TABLE(of, siox_gpio_dt_ids);
 
 static struct platform_driver siox_gpio_driver = {
 	.probe = siox_gpio_probe,
-	.remove = siox_gpio_remove,
 
 	.driver = {
 		.name = DRIVER_NAME,