[PATCH 8/9] mtd: rawnand: brcmnand: BCMA controller uses command shift of 0

Florian Fainelli f.fainelli at gmail.com
Wed Dec 22 16:22:24 PST 2021


For some odd and unexplained reason the BCMA NAND controller, albeit
revision 3.4 uses a command shift of 0 instead of 24 as it should be,
quirk that.

Signed-off-by: Florian Fainelli <f.fainelli at gmail.com>
---
 drivers/mtd/nand/raw/brcmnand/brcmnand.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
index 2f2aaa554282..2dfb94c4cc93 100644
--- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c
+++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c
@@ -908,6 +908,12 @@ static void brcmnand_wr_corr_thresh(struct brcmnand_host *host, u8 val)
 
 static inline int brcmnand_cmd_shift(struct brcmnand_controller *ctrl)
 {
+	/* Kludge for the BCMA-based NAND controller which does not actually
+	 * shift the command
+	 */
+	if (ctrl->nand_version == 0x0304 && brcmnand_soc_has_ops(ctrl->soc))
+		return 0;
+
 	if (ctrl->nand_version < 0x0602)
 		return 24;
 	return 0;
-- 
2.25.1




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