diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2019-12-03 21:05:13 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-12-16 12:29:36 +0100 |
| commit | c1a49782cc32d720284d82742e8d9468c5ceb988 (patch) | |
| tree | 4fec5dd1f2cca85e88733e2e87f482e37eb466c9 /drivers/mmc | |
| parent | mmc: renesas_sdhi: remove 4taps as a TMIO flag (diff) | |
| download | linux-c1a49782cc32d720284d82742e8d9468c5ceb988.tar.xz linux-c1a49782cc32d720284d82742e8d9468c5ceb988.zip | |
mmc: renesas_sdhi: use recent tap values for HS400
New datasheets require different and new values for HS400 with 4taps or
8taps.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Link: https://lore.kernel.org/r/20191203200513.1758-6-wsa+renesas@sang-engineering.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi.h | 4 | ||||
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi_core.c | 5 | ||||
| -rw-r--r-- | drivers/mmc/host/renesas_sdhi_internal_dmac.c | 2 |
3 files changed, 7 insertions, 4 deletions
diff --git a/drivers/mmc/host/renesas_sdhi.h b/drivers/mmc/host/renesas_sdhi.h index 88d05a617d43..f524251d5113 100644 --- a/drivers/mmc/host/renesas_sdhi.h +++ b/drivers/mmc/host/renesas_sdhi.h @@ -14,8 +14,8 @@ struct renesas_sdhi_scc { unsigned long clk_rate; /* clock rate for SDR104 */ - u32 tap; /* sampling clock position for SDR104 */ - u32 tap_hs400; /* sampling clock position for HS400 */ + u32 tap; /* sampling clock position for SDR104/HS400 (8 TAP) */ + u32 tap_hs400_4tap; /* sampling clock position for HS400 (4 TAP) */ }; struct renesas_sdhi_of_data { diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c index 24b37b4ac0b7..35cb24cd45b4 100644 --- a/drivers/mmc/host/renesas_sdhi_core.c +++ b/drivers/mmc/host/renesas_sdhi_core.c @@ -793,13 +793,16 @@ int renesas_sdhi_probe(struct platform_device *pdev, host->mmc->caps2 & (MMC_CAP2_HS200_1_8V_SDR | MMC_CAP2_HS400_1_8V))) { const struct renesas_sdhi_scc *taps = of_data->taps; + bool use_4tap = priv->quirks && priv->quirks->hs400_4taps; bool hit = false; for (i = 0; i < of_data->taps_num; i++) { if (taps[i].clk_rate == 0 || taps[i].clk_rate == host->mmc->f_max) { priv->scc_tappos = taps->tap; - priv->scc_tappos_hs400 = taps->tap_hs400; + priv->scc_tappos_hs400 = use_4tap ? + taps->tap_hs400_4tap : + taps->tap; hit = true; break; } diff --git a/drivers/mmc/host/renesas_sdhi_internal_dmac.c b/drivers/mmc/host/renesas_sdhi_internal_dmac.c index b9d2efc76c2d..47ac53e91241 100644 --- a/drivers/mmc/host/renesas_sdhi_internal_dmac.c +++ b/drivers/mmc/host/renesas_sdhi_internal_dmac.c @@ -82,7 +82,7 @@ static struct renesas_sdhi_scc rcar_gen3_scc_taps[] = { { .clk_rate = 0, .tap = 0x00000300, - .tap_hs400 = 0x00000704, + .tap_hs400_4tap = 0x00000100, }, }; |