[PATCH v4 08/10] memory: tegra: Ensure timing control debug features are disabled

Dmitry Osipenko
2019-06-16T23:35:49Z

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.

Signed-off-by: Dmitry Osipenko <digetx@gmail.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 eaebe371625c..4c1492c653e1 100644
--- a/drivers/memory/tegra/mc.c
+++ b/drivers/memory/tegra/mc.c
@@ -660,6 +660,9 @@ 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 0720a1d2023e..abc565b42225 100644
--- a/drivers/memory/tegra/mc.h
+++ b/drivers/memory/tegra/mc.h
@@ -33,6 +33,8 @@
#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)

--
2.22.0