From 28ece50436cf03f5479729b4a37b47087f8d459d Mon Sep 17 00:00:00 2001 From: Anson Huang Date: Fri, 31 Aug 2018 15:53:12 +0800 Subject: [PATCH] ARM: imx: add mmdc ipg clock operation for mmdc i.MX6 SoCs have MMDC ipg clock for registers access, to make sure MMDC registers access successfully, add optional clock enable for MMDC driver. Signed-off-by: Anson Huang Signed-off-by: Shawn Guo --- arch/arm/mach-imx/mmdc.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c index 04b3bf71de94b..e49e068345162 100644 --- a/arch/arm/mach-imx/mmdc.c +++ b/arch/arm/mach-imx/mmdc.c @@ -11,6 +11,7 @@ * http://www.gnu.org/copyleft/gpl.html */ +#include #include #include #include @@ -546,7 +547,20 @@ static int imx_mmdc_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; void __iomem *mmdc_base, *reg; + struct clk *mmdc_ipg_clk; u32 val; + int err; + + /* the ipg clock is optional */ + mmdc_ipg_clk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(mmdc_ipg_clk)) + mmdc_ipg_clk = NULL; + + err = clk_prepare_enable(mmdc_ipg_clk); + if (err) { + dev_err(&pdev->dev, "Unable to enable mmdc ipg clock.\n"); + return err; + } mmdc_base = of_iomap(np, 0); WARN_ON(!mmdc_base); -- 2.39.5