From 7d9b866867d3aa7d04139ee24763673c126ea0c7 Mon Sep 17 00:00:00 2001 From: Lucas Stach Date: Mon, 27 Nov 2017 13:11:39 +0100 Subject: ARM: imx: don't abort MMDC probe if power saving status doesn't match The power saving status bit will not signal if the MMDC is under load, which is likely during kernel boot. There is no point in checking this bit and aborting the probe, as there is nothing depending on power saving being enabled, so we can trust the memory controller to enable power saving when we allow it. Signed-off-by: Lucas Stach Signed-off-by: Shawn Guo --- arch/arm/mach-imx/mmdc.c | 11 ----------- 1 file changed, 11 deletions(-) (limited to 'arch') diff --git a/arch/arm/mach-imx/mmdc.c b/arch/arm/mach-imx/mmdc.c index 78262899a590..5fb1d2254b5e 100644 --- a/arch/arm/mach-imx/mmdc.c +++ b/arch/arm/mach-imx/mmdc.c @@ -547,7 +547,6 @@ static int imx_mmdc_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; void __iomem *mmdc_base, *reg; u32 val; - int timeout = 0x400; mmdc_base = of_iomap(np, 0); WARN_ON(!mmdc_base); @@ -565,16 +564,6 @@ static int imx_mmdc_probe(struct platform_device *pdev) val &= ~(1 << BP_MMDC_MAPSR_PSD); writel_relaxed(val, reg); - /* Ensure it's successfully enabled */ - while (!(readl_relaxed(reg) & 1 << BP_MMDC_MAPSR_PSS) && --timeout) - cpu_relax(); - - if (unlikely(!timeout)) { - pr_warn("%s: failed to enable automatic power saving\n", - __func__); - return -EBUSY; - } - return imx_mmdc_perf_init(pdev, mmdc_base); } -- cgit v1.2.3