linux-kernel - [PATCH v2 2/2] memory: tegra20-emc: Correct memory device mask

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Message-Id: <20211222043215.28237-2-digetx@gmail.com>
Date:   Wed, 22 Dec 2021 07:32:15 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Svyatoslav Ryhel <clamor95@...il.com>
Cc:     linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org
Subject: [PATCH v2 2/2] memory: tegra20-emc: Correct memory device mask

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.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---

Changelog:

v2: - New patch in v2.

 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;
 
-- 
2.33.1