From c4c21f22150ff5bffffb9454ce556ffa047e780d Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Fri, 15 Feb 2019 16:28:19 +0100 Subject: memory: tegra: Set DMA mask based on supported address bits The memory controller on Tegra124 and later supports 34 or more address bits. Advertise that by setting the DMA mask based on the number of the address bits. Signed-off-by: Thierry Reding --- drivers/memory/tegra/mc.c | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'drivers/memory/tegra') diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c index 3d8d322511c5..322aa7e8b088 100644 --- a/drivers/memory/tegra/mc.c +++ b/drivers/memory/tegra/mc.c @@ -5,6 +5,7 @@ #include #include +#include #include #include #include @@ -626,6 +627,7 @@ static int tegra_mc_probe(struct platform_device *pdev) struct resource *res; struct tegra_mc *mc; void *isr; + u64 mask; int err; mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL); @@ -637,6 +639,14 @@ static int tegra_mc_probe(struct platform_device *pdev) mc->soc = of_device_get_match_data(&pdev->dev); mc->dev = &pdev->dev; + mask = DMA_BIT_MASK(mc->soc->num_address_bits); + + err = dma_coerce_mask_and_coherent(&pdev->dev, mask); + if (err < 0) { + dev_err(&pdev->dev, "failed to set DMA mask: %d\n", err); + return err; + } + /* length of MC tick in nanoseconds */ mc->tick = 30; -- cgit v1.2.3