From 58b0a653b8dac40bbeb01a2c8a230aa8f84a7530 Mon Sep 17 00:00:00 2001 From: Guochun Mao Date: Tue, 18 Jan 2022 22:28:20 +0800 Subject: [PATCH] spi: spi-mtk-nor: add axi_s clock for mt8186 MT8186 needs axi_s clock for DMA feature. Signed-off-by: Guochun Mao Signed-off-by: Zhen Zhang Acked-by: AngeloGioacchino Del Regno Link: https://lore.kernel.org/r/20220118142820.2729-5-guochun.mao@mediatek.com Signed-off-by: Mark Brown --- drivers/spi/spi-mtk-nor.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-mtk-nor.c b/drivers/spi/spi-mtk-nor.c index e44fdf7..455b4dc 100644 --- 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, -- 2.7.4