memory: tegra30-emc: Fix dll_change check

[ Upstream commit 0a93f23 ]

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: e34212c ("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>

Author: cyndis

drivers/memory/tegra/tegra30-emc.c

@@ -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;