linux-kernel - [PATCH] regulator: ti-abb: Make use of the helper function devm

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Date:   Wed, 8 Sep 2021 18:57:44 +0800
From:   Cai Huoqing <caihuoqing@...du.com>
To:     <caihuoqing@...du.com>
CC:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] regulator: ti-abb: Make use of the helper function devm_ioremap related

Use the devm_platform_ioremap_resource_byname() helper instead of
calling platform_get_resource_byname() and devm_ioremap/devm_ioremap_resource()
separately

Signed-off-by: Cai Huoqing <caihuoqing@...du.com>
---
 drivers/regulator/ti-abb-regulator.c | 31 ++++++----------------------
 1 file changed, 6 insertions(+), 25 deletions(-)

diff --git a/drivers/regulator/ti-abb-regulator.c b/drivers/regulator/ti-abb-regulator.c
index 9f0a4d50cead..2931a0b89bff 100644
--- a/drivers/regulator/ti-abb-regulator.c
+++ b/drivers/regulator/ti-abb-regulator.c
@@ -725,9 +725,7 @@ static int ti_abb_probe(struct platform_device *pdev)
 
 	/* Map ABB resources */
 	if (abb->regs->setup_off || abb->regs->control_off) {
-		pname = "base-address";
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
-		abb->base = devm_ioremap_resource(dev, res);
+		abb->base = devm_platform_ioremap_resource_byname(pdev, "base-address");
 		if (IS_ERR(abb->base))
 			return PTR_ERR(abb->base);
 
@@ -735,35 +733,18 @@ static int ti_abb_probe(struct platform_device *pdev)
 		abb->control_reg = abb->base + abb->regs->control_off;
 
 	} else {
-		pname = "control-address";
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
-		abb->control_reg = devm_ioremap_resource(dev, res);
+		abb->control_reg = devm_platform_ioremap_resource_byname(pdev, "control-address");
 		if (IS_ERR(abb->control_reg))
 			return PTR_ERR(abb->control_reg);
 
-		pname = "setup-address";
-		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
-		abb->setup_reg = devm_ioremap_resource(dev, res);
+		abb->setup_reg = devm_platform_ioremap_resource_byname(pdev, "setup-address");
 		if (IS_ERR(abb->setup_reg))
 			return PTR_ERR(abb->setup_reg);
 	}
 
-	pname = "int-address";
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, pname);
-	if (!res) {
-		dev_err(dev, "Missing '%s' IO resource\n", pname);
-		return -ENODEV;
-	}
-	/*
-	 * We may have shared interrupt register offsets which are
-	 * write-1-to-clear between domains ensuring exclusivity.
-	 */
-	abb->int_base = devm_ioremap(dev, res->start,
-					     resource_size(res));
-	if (!abb->int_base) {
-		dev_err(dev, "Unable to map '%s'\n", pname);
-		return -ENOMEM;
-	}
+	abb->int_base = devm_platform_ioremap_resource_byname(pdev, "int-address");
+	if (IS_ERR(abb->int_base))
+		return PTR_ERR(abb->int_base);
 
 	/* Map Optional resources */
 	pname = "efuse-address";
-- 
2.25.1