linux-kernel - [PATCH v2 4/8] spi: mt65xx: Move clock parent setting to remove clock disable gotos

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Date:   Thu,  7 Apr 2022 13:44:24 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     broonie@...nel.org
Cc:     matthias.bgg@...il.com, linux-spi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        nfraprado@...labora.com, kernel@...labora.com,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v2 4/8] spi: mt65xx: Move clock parent setting to remove clock disable gotos

Reparenting sel_clk to parent_clk can be done before enabling any of
spi_clk and spi_hclk. Move the call to clk_set_parent() for sel_clk
earlier, and call disable_unprepare() upon spi_clk prepare_enable()
failure to remove all clock disablement related gotos.
This commit is in preparation of a later cleanup.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/spi/spi-mt65xx.c | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 250a508427ee..a2daba3bba91 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -1195,6 +1195,12 @@ static int mtk_spi_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to clk_set_parent (%d)\n", ret);
+		return ret;
+	}
+
 	ret = clk_prepare_enable(mdata->spi_hclk);
 	if (ret < 0) {
 		dev_err(dev, "failed to enable hclk (%d)\n", ret);
@@ -1204,13 +1210,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	ret = clk_prepare_enable(mdata->spi_clk);
 	if (ret < 0) {
 		dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
-		goto err_disable_spi_hclk;
-	}
-
-	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
-	if (ret < 0) {
-		dev_err(dev, "failed to clk_set_parent (%d)\n", ret);
-		goto err_disable_spi_clk;
+		clk_disable_unprepare(mdata->spi_hclk);
+		return ret;
 	}
 
 	mdata->spi_clk_hz = clk_get_rate(mdata->spi_clk);
@@ -1261,10 +1262,6 @@ static int mtk_spi_probe(struct platform_device *pdev)
 
 err_disable_runtime_pm:
 	pm_runtime_disable(dev);
-err_disable_spi_clk:
-	clk_disable_unprepare(mdata->spi_clk);
-err_disable_spi_hclk:
-	clk_disable_unprepare(mdata->spi_hclk);
 
 	return ret;
 }
-- 
2.35.1