spi: spi-mtk-nor: add axi_s clock for mt8186

MT8186 needs axi_s clock for DMA feature.

Signed-off-by: Guochun Mao <guochun.mao@mediatek.com>
Signed-off-by: Zhen Zhang <zhen.zhang@mediatek.com>
Acked-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220118142820.2729-5-guochun.mao@mediatek.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c
index e44fdf7..455b4dc 100644 (file)
--- a/drivers/spi/spi-mtk-nor.c
+++ b/drivers/spi/spi-mtk-nor.c
@@ -115,6 +115,7 @@ struct mtk_nor {
        struct clk *spi_clk;
        struct clk *ctlr_clk;
        struct clk *axi_clk;
+       struct clk *axi_s_clk;
        unsigned int spi_freq;
        bool wbuf_en;
        bool has_irq;
@@ -691,6 +692,7 @@ static void mtk_nor_disable_clk(struct mtk_nor *sp)
        clk_disable_unprepare(sp->spi_clk);
        clk_disable_unprepare(sp->ctlr_clk);
        clk_disable_unprepare(sp->axi_clk);
+       clk_disable_unprepare(sp->axi_s_clk);
 }
 
 static int mtk_nor_enable_clk(struct mtk_nor *sp)
@@ -714,6 +716,14 @@ static int mtk_nor_enable_clk(struct mtk_nor *sp)
                return ret;
        }
 
+       ret = clk_prepare_enable(sp->axi_s_clk);
+       if (ret) {
+               clk_disable_unprepare(sp->spi_clk);
+               clk_disable_unprepare(sp->ctlr_clk);
+               clk_disable_unprepare(sp->axi_clk);
+               return ret;
+       }
+
        return 0;
 }
 
@@ -789,7 +799,7 @@ static int mtk_nor_probe(struct platform_device *pdev)
        struct mtk_nor *sp;
        struct mtk_nor_caps *caps;
        void __iomem *base;
-       struct clk *spi_clk, *ctlr_clk, *axi_clk;
+       struct clk *spi_clk, *ctlr_clk, *axi_clk, *axi_s_clk;
        int ret, irq;
 
        base = devm_platform_ioremap_resource(pdev, 0);
@@ -808,6 +818,10 @@ static int mtk_nor_probe(struct platform_device *pdev)
        if (IS_ERR(axi_clk))
                return PTR_ERR(axi_clk);
 
+       axi_s_clk = devm_clk_get_optional(&pdev->dev, "axi_s");
+       if (IS_ERR(axi_s_clk))
+               return PTR_ERR(axi_s_clk);
+
        caps = (struct mtk_nor_caps *)of_device_get_match_data(&pdev->dev);
 
        ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(caps->dma_bits));
@@ -843,6 +857,7 @@ static int mtk_nor_probe(struct platform_device *pdev)
        sp->spi_clk = spi_clk;
        sp->ctlr_clk = ctlr_clk;
        sp->axi_clk = axi_clk;
+       sp->axi_s_clk = axi_s_clk;
        sp->caps = caps;
        sp->high_dma = caps->dma_bits > 32;
        sp->buffer = dmam_alloc_coherent(&pdev->dev,