From: Dmitry Osipenko <digetx@gmail.com>
Date: Mon, 12 Aug 2019 00:00:41 +0300
Subject: memory: tegra: Ensure timing control debug features are disabled
Git-commit: 77b7182ff18dd5a83d938ab42772db5cb82c75b8
Patch-mainline: v5.5-rc1
References: jsc#SLE-15847
Timing control debug features should be disabled at a boot time, but you
never now and hence it's better to disable them explicitly because some of
those features are crucial for the driver to do a proper thing.
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
drivers/memory/tegra/mc.c | 3 +++
drivers/memory/tegra/mc.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/memory/tegra/mc.c b/drivers/memory/tegra/mc.c
index 41ee420275f1..a1f9a0506048 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -667,6 +667,9 @@ static int tegra_mc_probe(struct platform_device *pdev)
} else
#endif
{
+ /* ensure that debug features are disabled */
+ mc_writel(mc, 0x00000000, MC_TIMING_CONTROL_DBG);
+
err = tegra_mc_setup_latency_allowance(mc);
if (err < 0) {
dev_err(&pdev->dev,
diff --git a/drivers/memory/tegra/mc.h b/drivers/memory/tegra/mc.h
index 410efc4d7e7b..cd52628c2b96 100644
--- a/drivers/memory/tegra/mc.h
+++ b/drivers/memory/tegra/mc.h
@@ -30,6 +30,8 @@
#define MC_EMEM_ARB_OVERRIDE 0xe8
#define MC_EMEM_ARB_OVERRIDE_EACK_MASK 0x3
+#define MC_TIMING_CONTROL_DBG 0xf8
+
#define MC_TIMING_CONTROL 0xfc
#define MC_TIMING_UPDATE BIT(0)
--
2.26.2