spi: mpc5xxx-psc: Convert probe to use devres functions

Convert the mpc52xx-psc and mpc512x-psc drivers to use the managed
devres variants of functions in probe. Also use dev_err_probe() as
appropriate. With this, the error handling can be simplified.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230217-dt-mpc5xxx-spi-v1-2-3be8602fce1e@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-mpc512x-psc.c

@@ -467,7 +467,7 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
 	void *tempp;
 	struct clk *clk;
 
-	master = spi_alloc_master(dev, sizeof(*mps));
+	master = devm_spi_alloc_master(dev, sizeof(*mps));
 	if (master == NULL)
 		return -ENOMEM;
 
@@ -486,28 +486,24 @@ static int mpc512x_psc_spi_do_probe(struct device *dev, u32 regaddr,
 	master->dev.of_node = dev->of_node;
 
 	tempp = devm_ioremap(dev, regaddr, size);
-	if (!tempp) {
+	if (!tempp)
-		dev_err(dev, "could not ioremap I/O port range\n");
+		return dev_err_probe(dev, -EFAULT, "could not ioremap I/O port range\n");
-		ret = -EFAULT;
-		goto free_master;
-	}
 	mps->psc = tempp;
 	mps->fifo =
 		(struct mpc512x_psc_fifo *)(tempp + sizeof(struct mpc52xx_psc));
 	ret = devm_request_irq(dev, mps->irq, mpc512x_psc_spi_isr, IRQF_SHARED,
 				"mpc512x-psc-spi", mps);
 	if (ret)
-		goto free_master;
+		return ret;
 	init_completion(&mps->txisrdone);
 
 	clk = devm_clk_get(dev, "mclk");
-	if (IS_ERR(clk)) {
+	if (IS_ERR(clk))
-		ret = PTR_ERR(clk);
+		return PTR_ERR(clk);
-		goto free_master;
+
-	}
 	ret = clk_prepare_enable(clk);
 	if (ret)
-		goto free_master;
+		return ret;
 	mps->clk_mclk = clk;
 	mps->mclk_rate = clk_get_rate(clk);
 
@@ -535,8 +531,6 @@ free_ipg_clock:
 	clk_disable_unprepare(mps->clk_ipg);
 free_mclk_clock:
 	clk_disable_unprepare(mps->clk_mclk);
-free_master:
-	spi_master_put(master);
 
 	return ret;
 }

drivers/spi/spi-mpc52xx-psc.c

@@ -300,7 +300,7 @@ static int mpc52xx_psc_spi_do_probe(struct device *dev, u32 regaddr,
 	struct spi_master *master;
 	int ret;
 
-	master = spi_alloc_master(dev, sizeof(*mps));
+	master = devm_spi_alloc_master(dev, sizeof(*mps));
 	if (master == NULL)
 		return -ENOMEM;
 
@@ -318,42 +318,24 @@ static int mpc52xx_psc_spi_do_probe(struct device *dev, u32 regaddr,
 	master->cleanup = mpc52xx_psc_spi_cleanup;
 	master->dev.of_node = dev->of_node;
 
-	mps->psc = ioremap(regaddr, size);
+	mps->psc = devm_ioremap(dev, regaddr, size);
-	if (!mps->psc) {
+	if (!mps->psc)
-		dev_err(dev, "could not ioremap I/O port range\n");
+		return dev_err_probe(dev, -EFAULT, "could not ioremap I/O port range\n");
-		ret = -EFAULT;
-		goto free_master;
-	}
 	/* On the 5200, fifo regs are immediately ajacent to the psc regs */
 	mps->fifo = ((void __iomem *)mps->psc) + sizeof(struct mpc52xx_psc);
 
-	ret = request_irq(mps->irq, mpc52xx_psc_spi_isr, 0, "mpc52xx-psc-spi",
+	ret = devm_request_irq(dev, mps->irq, mpc52xx_psc_spi_isr, 0,
-				mps);
+			       "mpc52xx-psc-spi", mps);
 	if (ret)
-		goto free_master;
+		return ret;
 
 	ret = mpc52xx_psc_spi_port_config(master->bus_num, mps);
-	if (ret < 0) {
+	if (ret < 0)
-		dev_err(dev, "can't configure PSC! Is it capable of SPI?\n");
+		return dev_err_probe(dev, ret, "can't configure PSC! Is it capable of SPI?\n");
-		goto free_irq;
-	}
 
 	init_completion(&mps->done);
 
-	ret = spi_register_master(master);
+	return devm_spi_register_master(dev, master);
-	if (ret < 0)
-		goto free_irq;
-
-	return ret;
-
-free_irq:
-	free_irq(mps->irq, mps);
-free_master:
-	if (mps->psc)
-		iounmap(mps->psc);
-	spi_master_put(master);
-
-	return ret;
 }
 
 static int mpc52xx_psc_spi_of_probe(struct platform_device *op)
@@ -385,20 +367,6 @@ static int mpc52xx_psc_spi_of_probe(struct platform_device *op)
 				irq_of_parse_and_map(op->dev.of_node, 0), id);
 }
 
-static int mpc52xx_psc_spi_of_remove(struct platform_device *op)
-{
-	struct spi_master *master = spi_master_get(platform_get_drvdata(op));
-	struct mpc52xx_psc_spi *mps = spi_master_get_devdata(master);
-
-	spi_unregister_master(master);
-	free_irq(mps->irq, mps);
-	if (mps->psc)
-		iounmap(mps->psc);
-	spi_master_put(master);
-
-	return 0;
-}
-
 static const struct of_device_id mpc52xx_psc_spi_of_match[] = {
 	{ .compatible = "fsl,mpc5200-psc-spi", },
 	{ .compatible = "mpc5200-psc-spi", }, /* old */
@@ -409,7 +377,6 @@ MODULE_DEVICE_TABLE(of, mpc52xx_psc_spi_of_match);
 
 static struct platform_driver mpc52xx_psc_spi_of_driver = {
 	.probe = mpc52xx_psc_spi_of_probe,
-	.remove = mpc52xx_psc_spi_of_remove,
 	.driver = {
 		.name = "mpc52xx-psc-spi",
 		.of_match_table = mpc52xx_psc_spi_of_match,