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memory: tegra30-emc: Fix dll_change check

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[ Upstream commit 0a93f2355c ]

The code checking whether the specified memory timing enables DLL
in the EMRS register was reversed. DLL is enabled if bit A0 is low.
Fix the check.

Fixes: e34212c75a ("memory: tegra: Introduce Tegra30 EMC driver")
Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
Link: https://patch.msgid.link/20260126-fix-emc-dllchange-v1-2-47ad3bb63262@nvidia.com
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mikko Perttunen
2026-05-23 13:03:16 +02:00
committed by Greg Kroah-Hartman
parent 7e19e72f30
commit cecc17692e
1 changed files with 3 additions and 3 deletions
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drivers/memory/tegra/tegra30-emc.c
+3 -3
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@@ -554,14 +554,14 @@ static int emc_prepare_timing_change(struct tegra_emc *emc, unsigned long rate)
emc->emc_cfg = readl_relaxed(emc->regs + EMC_CFG);
emc_dbg = readl_relaxed(emc->regs + EMC_DBG);
if (emc->dll_on == !!(timing->emc_mode_1 & 0x1))
if (emc->dll_on == !(timing->emc_mode_1 & 0x1))
dll_change = DLL_CHANGE_NONE;
else if (timing->emc_mode_1 & 0x1)
else if (!(timing->emc_mode_1 & 0x1))
dll_change = DLL_CHANGE_ON;
else
dll_change = DLL_CHANGE_OFF;
emc->dll_on = !!(timing->emc_mode_1 & 0x1);
emc->dll_on = !(timing->emc_mode_1 & 0x1);
if (timing->data[80] && !readl_relaxed(emc->regs + EMC_ZCAL_INTERVAL))
emc->zcal_long = true;