linux-kernel - [PATCH V2] mtd: rawnand: qcom: update last code word register

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Message-Id: <1609785078-22310-1-git-send-email-mdalam@codeaurora.org>
Date:   Tue,  5 Jan 2021 00:01:18 +0530
From:   Md Sadre Alam <mdalam@...eaurora.org>
To:     miquel.raynal@...tlin.com, manivannan.sadhasivam@...aro.org,
        linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
        boris.brezillon@...labora.com, vigneshr@...com
Cc:     mdalam@...eaurora.org, sricharan@...eaurora.org
Subject: [PATCH V2] mtd: rawnand: qcom: update last code word register

>From QPIC version 2.0 onwards new register got added to
read last codeword. This change will update the same.

For first three code word READ_LOCATION_n register will be
use.For last code wrod READ_LOCATION_LAST_CW_n register will be
use.

Signed-off-by: Md Sadre Alam <mdalam@...eaurora.org>
---
[V2]
 * Fixed alignment for NAND_READ_LOCATION_LAST_CW_n reg macro
 * Changed number of register write to 1 when NAND_READ_LOCATION_LAST_CW_n register will use
 drivers/mtd/nand/raw/qcom_nandc.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/nand/raw/qcom_nandc.c b/drivers/mtd/nand/raw/qcom_nandc.c
index eaef51d..9e89236 100644
--- a/drivers/mtd/nand/raw/qcom_nandc.c
+++ b/drivers/mtd/nand/raw/qcom_nandc.c
@@ -48,10 +48,10 @@
 #define	NAND_READ_LOCATION_1		0xf24
 #define	NAND_READ_LOCATION_2		0xf28
 #define	NAND_READ_LOCATION_3		0xf2c
-#define NAND_READ_LOCATION_LAST_CW_0    0xf40
-#define NAND_READ_LOCATION_LAST_CW_1    0xf44
-#define NAND_READ_LOCATION_LAST_CW_2    0xf48
-#define NAND_READ_LOCATION_LAST_CW_3    0xf4c
+#define	NAND_READ_LOCATION_LAST_CW_0	0xf40
+#define	NAND_READ_LOCATION_LAST_CW_1	0xf44
+#define	NAND_READ_LOCATION_LAST_CW_2	0xf48
+#define	NAND_READ_LOCATION_LAST_CW_3	0xf4c
 
 /* dummy register offsets, used by write_reg_dma */
 #define	NAND_DEV_CMD1_RESTORE		0xdead
@@ -1125,7 +1125,7 @@ config_nand_cw_read(struct qcom_nand_controller *nandc, bool use_ecc)
 	if (nandc->props->is_bam) {
 		if (nandc->props->qpic_v2)
 			write_reg_dma(nandc, NAND_READ_LOCATION_LAST_CW_0,
-				      4, NAND_BAM_NEXT_SGL);
+				      1, NAND_BAM_NEXT_SGL);
 		write_reg_dma(nandc, NAND_READ_LOCATION_0, 4,
 			      NAND_BAM_NEXT_SGL);
 	}
-- 
2.7.4