diff options
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/renesas-sdhi.c | 21 | ||||
| -rw-r--r-- | drivers/mmc/tmio-common.h | 1 |
2 files changed, 18 insertions, 4 deletions
diff --git a/drivers/mmc/renesas-sdhi.c b/drivers/mmc/renesas-sdhi.c index f30d7847bf..4a1accebfc 100644 --- a/drivers/mmc/renesas-sdhi.c +++ b/drivers/mmc/renesas-sdhi.c @@ -358,13 +358,21 @@ static int renesas_sdhi_hs400(struct udevice *dev) struct mmc *mmc = mmc_get_mmc_dev(dev); bool hs400 = (mmc->selected_mode == MMC_HS_400); int ret, taps = hs400 ? priv->nrtaps : 8; + const u32 sdn_rate = 200000000; + u32 sdnh_rate = 800000000; unsigned long new_tap; u32 reg; - if (taps == 4) /* HS400 on 4tap SoC needs different clock */ - ret = clk_set_rate(&priv->clk, 400000000); - else - ret = clk_set_rate(&priv->clk, 200000000); + if (clk_valid(&priv->clkh) && !priv->needs_clkh_fallback) { + /* HS400 on 4tap SoC => SDnH=400 MHz, SDn=200 MHz */ + if (taps == 4) + sdnh_rate /= 2; + ret = clk_set_rate(&priv->clkh, sdnh_rate); + if (ret < 0) + return ret; + } + + ret = clk_set_rate(&priv->clk, sdn_rate); if (ret < 0) return ret; @@ -967,6 +975,11 @@ static int renesas_sdhi_probe(struct udevice *dev) return ret; } + /* optional SDnH clock */ + ret = clk_get_by_name(dev, "clkh", &priv->clkh); + if (ret < 0) + dev_dbg(dev, "failed to get clkh\n"); + /* set to max rate */ ret = clk_set_rate(&priv->clk, 200000000); if (ret < 0) { diff --git a/drivers/mmc/tmio-common.h b/drivers/mmc/tmio-common.h index e517ed978b..88244e878b 100644 --- a/drivers/mmc/tmio-common.h +++ b/drivers/mmc/tmio-common.h @@ -138,6 +138,7 @@ struct tmio_sd_priv { #endif #if CONFIG_IS_ENABLED(CLK) struct clk clk; + struct clk clkh; #endif #if CONFIG_IS_ENABLED(RENESAS_SDHI) unsigned int smpcmp; |