linux-kernel - [PATCH v3 2/9] spi: mtk-snfi: Add optional nfi

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Date:   Thu, 8 Dec 2022 14:29:48 +0800
From:   Xiangsheng Hou <xiangsheng.hou@...iatek.com>
To:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Chuanhong Guo <gch981213@...il.com>
CC:     Xiangsheng Hou <xiangsheng.hou@...iatek.com>,
        <linux-mtd@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-spi@...r.kernel.org>,
        <benliang.zhao@...iatek.com>, <bin.zhang@...iatek.com>,
        "AngeloGioacchino Del Regno" 
        <angelogioacchino.delregno@...labora.com>
Subject: [PATCH v3 2/9] spi: mtk-snfi: Add optional nfi_hclk which is needed for MT7986

Add optional nfi_hclk which is needed for MT7986.

Signed-off-by: Xiangsheng Hou <xiangsheng.hou@...iatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 drivers/spi/spi-mtk-snfi.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/spi/spi-mtk-snfi.c b/drivers/spi/spi-mtk-snfi.c
index 719fc6f53ab1..85644308df23 100644
--- a/drivers/spi/spi-mtk-snfi.c
+++ b/drivers/spi/spi-mtk-snfi.c
@@ -297,6 +297,7 @@ struct mtk_snand {
 	struct device *dev;
 	struct clk *nfi_clk;
 	struct clk *pad_clk;
+	struct clk *nfi_hclk;
 	void __iomem *nfi_base;
 	int irq;
 	struct completion op_done;
@@ -1339,7 +1340,16 @@ static int mtk_snand_enable_clk(struct mtk_snand *ms)
 		dev_err(ms->dev, "unable to enable pad clk\n");
 		goto err1;
 	}
+	ret = clk_prepare_enable(ms->nfi_hclk);
+	if (ret) {
+		dev_err(ms->dev, "unable to enable nfi hclk\n");
+		goto err2;
+	}
+
 	return 0;
+
+err2:
+	clk_disable_unprepare(ms->pad_clk);
 err1:
 	clk_disable_unprepare(ms->nfi_clk);
 	return ret;
@@ -1347,6 +1357,7 @@ static int mtk_snand_enable_clk(struct mtk_snand *ms)
 
 static void mtk_snand_disable_clk(struct mtk_snand *ms)
 {
+	clk_disable_unprepare(ms->nfi_hclk);
 	clk_disable_unprepare(ms->pad_clk);
 	clk_disable_unprepare(ms->nfi_clk);
 }
@@ -1401,6 +1412,13 @@ static int mtk_snand_probe(struct platform_device *pdev)
 		goto release_ecc;
 	}
 
+	ms->nfi_hclk = devm_clk_get_optional(&pdev->dev, "nfi_hclk");
+	if (IS_ERR(ms->nfi_hclk)) {
+		ret = PTR_ERR(ms->nfi_hclk);
+		dev_err(&pdev->dev, "unable to get nfi_hclk, err = %d\n", ret);
+		goto release_ecc;
+	}
+
 	ret = mtk_snand_enable_clk(ms);
 	if (ret)
 		goto release_ecc;
-- 
2.25.1