From: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
The Renesas BSP confirms that H3 ES1.x and M3-W ES1.x do not properly
support HS400. Add a quirk to indicate this and disable HS400 in the MMC
capabilities if the quirk is set.
Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
---
drivers/mmc/host/renesas_sdhi_core.c | 20 +++++++++++++++-----
1 file changed, 15 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/host/renesas_sdhi_core.c
b/drivers/mmc/host/renesas_sdhi_core.c
index 19d89b4dda64c13c..ed2c406fd62b5c7d 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -47,6 +47,7 @@
#define SDHI_VER_GEN3_SDMMC 0xcd10
struct renesas_sdhi_quirks {
+ bool hs400_disabled;
bool hs400_4taps;
};
@@ -607,15 +608,21 @@ static void renesas_sdhi_enable_dma(struct tmio_mmc_host
*host, bool enable)
renesas_sdhi_sdbuf_width(host, enable ? width : 16);
}
-static const struct renesas_sdhi_quirks sdhi_quirks_h3_m3w = {
+static const struct renesas_sdhi_quirks sdhi_quirks_h3_m3w_es1 = {
+ .hs400_disabled = true,
+ .hs400_4taps = true,
+};
+
+static const struct renesas_sdhi_quirks sdhi_quirks_h3_es2 = {
+ .hs400_disabled = false,
.hs400_4taps = true,
};
static const struct soc_device_attribute sdhi_quirks_match[] = {
- { .soc_id = "r8a7795", .revision = "ES1.*", .data = &sdhi_quirks_h3_m3w
},
- { .soc_id = "r8a7795", .revision = "ES2.0", .data = &sdhi_quirks_h3_m3w
},
- { .soc_id = "r8a7796", .revision = "ES1.0", .data = &sdhi_quirks_h3_m3w
},
- { .soc_id = "r8a7796", .revision = "ES1.1", .data = &sdhi_quirks_h3_m3w
},
+ { .soc_id = "r8a7795", .revision = "ES1.*", .data =
&sdhi_quirks_h3_m3w_es1 },
+ { .soc_id = "r8a7795", .revision = "ES2.0", .data = &sdhi_quirks_h3_es2
},
+ { .soc_id = "r8a7796", .revision = "ES1.0", .data =
&sdhi_quirks_h3_m3w_es1 },
+ { .soc_id = "r8a7796", .revision = "ES1.1", .data =
&sdhi_quirks_h3_m3w_es1 },
{ /* Sentinel. */ },
};
@@ -704,6 +711,9 @@ int renesas_sdhi_probe(struct platform_device *pdev,
host->multi_io_quirk = renesas_sdhi_multi_io_quirk;
host->dma_ops = dma_ops;
+ if (quirks && quirks->hs400_disabled)
+ host->mmc->caps2 &= ~(MMC_CAP2_HS400 | MMC_CAP2_HS400_ES);
+
if (quirks && quirks->hs400_4taps)
mmc_data->flags |= TMIO_MMC_HAVE_4TAP_HS400;
--
2.19.1
