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authorCong Dang <cong.dang.xn@renesas.com>2022-10-12 17:01:51 +0300
committerKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>2022-10-18 20:02:44 +0300
commit5192481f908e576be42bd39ec12979b79e11f7e0 (patch)
treec5942c3933bb8e7a4adeb634371ebb35075cbd1b /drivers/memory/renesas-rpc-if.c
parentfad9489abf932ff01ca2b9a9bf41a11311bdc8d5 (diff)
downloadlinux-5192481f908e576be42bd39ec12979b79e11f7e0.tar.xz
memory: renesas-rpc-if: Clear HS bit during hardware initialization
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>
Diffstat (limited to 'drivers/memory/renesas-rpc-if.c')
-rw-r--r--drivers/memory/renesas-rpc-if.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-if.c
index 4316988d791a..61c288d40375 100644
--- a/drivers/memory/renesas-rpc-if.c
+++ b/drivers/memory/renesas-rpc-if.c
@@ -317,6 +317,9 @@ 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));