linux-kernel - [PATCH] mmc: renesas_sdhi: Fix HS400 on R-Car M3-W+

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Date:   Fri,  4 Jun 2021 14:59:43 +0200
From:   Geert Uytterhoeven <geert+renesas@...der.be>
To:     Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Takeshi Saito <takeshi.saito.xv@...esas.com>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        linux-mmc@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH] mmc: renesas_sdhi: Fix HS400 on R-Car M3-W+

R-Car M3-W ES3.0 is marketed as R-Car M3-W+ (R8A77961), and has its own
compatible value "renesas,r8a77961".

Hence using soc_device_match() with soc_id = "r8a7796" and revision =
"ES3.*" does not actually match running on an R-Car M3-W+ SoC.

Fix this by matching with soc_id = "r8a77961" instead.

Fixes: a38c078fea0b1393 ("mmc: renesas_sdhi: Avoid bad TAP in HS400")
Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
---
Boot-tested on Salvator-XS with R-Car M3-W+ ES3.0.
No difference seen in eMMC/SHHC detection:

    mmc0: new HS400 MMC card at address 0001
    mmcblk0: mmc0:0001 BGSD4R 29.1 GiB
    mmcblk0boot0: mmc0:0001 BGSD4R 31.9 MiB
    mmcblk0boot1: mmc0:0001 BGSD4R 31.9 MiB
    mmcblk0rpmb: mmc0:0001 BGSD4R 4.00 MiB, chardev (247:0)
     mmcblk0: p1
    mmc1: new ultra high speed SDR104 SDHC card at address aaaa
    mmcblk1: mmc1:aaaa SL16G 14.8 GiB
     mmcblk1: p1
    mmc2: new ultra high speed SDR104 SDHC card at address aaaa
    mmcblk2: mmc2:aaaa SL32G 29.7 GiB
     mmcblk2: p1
---
 drivers/mmc/host/renesas_sdhi_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 635bf31a67359f10..b719eda6b8619453 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -939,7 +939,7 @@ static const struct soc_device_attribute sdhi_quirks_match[]  = {
 	{ .soc_id = "r8a7795", .revision = "ES3.*", .data = &sdhi_quirks_bad_taps2367 },
 	{ .soc_id = "r8a7796", .revision = "ES1.[012]", .data = &sdhi_quirks_4tap_nohs400 },
 	{ .soc_id = "r8a7796", .revision = "ES1.*", .data = &sdhi_quirks_r8a7796_es13 },
-	{ .soc_id = "r8a7796", .revision = "ES3.*", .data = &sdhi_quirks_bad_taps1357 },
+	{ .soc_id = "r8a77961", .data = &sdhi_quirks_bad_taps1357 },
 	{ .soc_id = "r8a77965", .data = &sdhi_quirks_r8a77965 },
 	{ .soc_id = "r8a77980", .data = &sdhi_quirks_nohs400 },
 	{ .soc_id = "r8a77990", .data = &sdhi_quirks_r8a77990 },
-- 
2.25.1