linux-kernel - [PATCH] soc: mediatek: mutex: Simplify with devm_platform_get_and_ioremap

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Message-Id: <20220623121701.107512-1-angelogioacchino.delregno@collabora.com>
Date:   Thu, 23 Jun 2022 14:17:01 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     matthias.bgg@...il.com
Cc:     linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH] soc: mediatek: mutex: Simplify with devm_platform_get_and_ioremap_resource()

Convert platform_get_resource(), devm_ioremap_resource() to a single
call to devm_platform_get_and_ioremap_resource(), as this is exactly
what this function does.

While at it, also remove a redundant call to of_address_to_resource(),
as this was getting the address of the same resource index 0: we can
as well get the iostart from the 'regs' pointer.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/soc/mediatek/mtk-mutex.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-mutex.c b/drivers/soc/mediatek/mtk-mutex.c
index 60cbafea577e..ca8440fb48cd 100644
--- a/drivers/soc/mediatek/mtk-mutex.c
+++ b/drivers/soc/mediatek/mtk-mutex.c
@@ -787,7 +787,7 @@ static int mtk_mutex_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct mtk_mutex_ctx *mtx;
-	struct resource *regs, addr;
+	struct resource *regs;
 	int i;
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	int ret;
@@ -811,11 +811,12 @@ static int mtk_mutex_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (of_address_to_resource(dev->of_node, 0, &addr) < 0) {
-		dev_err(dev, "Failed to get addr\n");
-		return -EINVAL;
+	mtx->regs = devm_platform_get_and_ioremap_resource(pdev, 0, &regs);
+	if (IS_ERR(mtx->regs)) {
+		dev_err(dev, "Failed to map mutex registers\n");
+		return PTR_ERR(mtx->regs);
 	}
-	mtx->addr = addr.start;
+	mtx->addr = regs->start;
 
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	ret = cmdq_dev_get_client_reg(dev, &mtx->cmdq_reg, 0);
@@ -823,13 +824,6 @@ static int mtk_mutex_probe(struct platform_device *pdev)
 		dev_dbg(dev, "No mediatek,gce-client-reg!\n");
 #endif
 
-	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	mtx->regs = devm_ioremap_resource(dev, regs);
-	if (IS_ERR(mtx->regs)) {
-		dev_err(dev, "Failed to map mutex registers\n");
-		return PTR_ERR(mtx->regs);
-	}
-
 	platform_set_drvdata(pdev, mtx);
 
 	return 0;
-- 
2.35.1