diff mbox series

[5.10.y-cip,1/3] memory: renesas-rpc-if: Clear HS bit during hardware initialization

Message ID 20240315170304.31604-2-prabhakar.mahadev-lad.rj@bp.renesas.com (mailing list archive)
State New
Headers show
Series Add RPC-IF support for RZ/G2{EHMN} | expand

Commit Message

Lad Prabhakar March 15, 2024, 5:03 p.m. UTC 
From: Cong Dang <cong.dang.xn@renesas.com>

commit 5192481f908e576be42bd39ec12979b79e11f7e0 upstream.

According to the datasheet, HS bit should be specified to 1 when using
DMA transfer. As DMA transfer is not supported, it should be cleared to
0.

Previously, the driver relied on the HS bit being cleared by prior
firmware but this is not always the case.

Fix this by ensuring the bit is cleared during hardware initialization.

Fixes: ca7d8b980b67 ("memory: add Renesas RPC-IF driver")
Signed-off-by: Cong Dang <cong.dang.xn@renesas.com>
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/08d9fb10b3051decebf871267a6e2e7cb2d4faf9.1665583089.git.geert+renesas@glider.be
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
---
 drivers/memory/renesas-rpc-if.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index 6a096a033651..598180b2adaf 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -318,6 +318,9 @@  int rpcif_hw_init(struct rpcif *rpc, bool hyperflash)
 	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT, RPCIF_PHYCNT_PHYMEM_MASK,
 			   RPCIF_PHYCNT_PHYMEM(hyperflash ? 3 : 0));
 
+	/* DMA Transfer is not supported */
+	regmap_update_bits(rpc->regmap, RPCIF_PHYCNT, RPCIF_PHYCNT_HS, 0);
+
 	if (rpc->type == RPCIF_RCAR_GEN3)
 		regmap_update_bits(rpc->regmap, RPCIF_PHYCNT,
 				   RPCIF_PHYCNT_STRTIM(7), RPCIF_PHYCNT_STRTIM(7));