[PATCH 5.16 0294/1017] memory: tegra20-emc: Correct memory device mask

[Greg Kroah-Hartman]

From: Dmitry Osipenko <digetx@xxxxxxxxx>

[ Upstream commit 9ff684342ee7d3ea2755c6e9b60bc43085baa3ad ]

Memory chip select is swapped when we read mode register, correct it.
We didn't have devices that use a single LPDDR chip and both chips are
always identical, hence this change is just a minor improvement.

Fixes: 131dd9a436d8 ("memory: tegra20-emc: Support matching timings by LPDDR2 configuration")
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Link: https://lore.kernel.org/r/20211222043215.28237-2-digetx@xxxxxxxxx
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/memory/tegra/tegra20-emc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/memory/tegra/tegra20-emc.c b/drivers/memory/tegra/tegra20-emc.c
index 497b6edbf3ca..25ba3c5e4ad6 100644
--- a/drivers/memory/tegra/tegra20-emc.c
+++ b/drivers/memory/tegra/tegra20-emc.c
@@ -540,7 +540,7 @@ static int emc_read_lpddr_mode_register(struct tegra_emc *emc,
 					unsigned int register_addr,
 					unsigned int *register_data)
 {
-	u32 memory_dev = emem_dev + 1;
+	u32 memory_dev = emem_dev ? 1 : 2;
 	u32 val, mr_mask = 0xff;
 	int err;
 
-- 
2.34.1