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mmc: sdhci-of-dwcmshc: Remove HS200 and HS400 at low speed for rockchip

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Rockchip platforms don't support HS200 or HS400 at low speed, so
we must limit it.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Change-Id: I40eb9f117fd83789b6ab7a16d44049e16786698b
This commit is contained in:
Shawn Lin
2021-09-03 10:05:05 +08:00
committed by Tao Huang
parent a2d74ca47b
commit d226c884fd
1 changed files with 14 additions and 4 deletions
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18
drivers/mmc/host/sdhci-of-dwcmshc.c
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@@ -339,6 +339,16 @@ static int rockchip_pltf_init(struct sdhci_host *host, struct dwcmshc_priv *priv
/* Reset previous settings */
sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK);
sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_STRBIN);
/*
* Don't support highspeed bus mode with low clk speed as we
* cannot use DLL for this condition.
*/
if (host->mmc->f_max <= 52000000) {
host->mmc->caps2 &= ~(MMC_CAP2_HS200 | MMC_CAP2_HS400);
host->mmc->caps &= ~(MMC_CAP_3_3V_DDR | MMC_CAP_1_8V_DDR);
}
return 0;
}
@@ -413,6 +423,10 @@ static int dwcmshc_probe(struct platform_device *pdev)
host->mmc_host_ops.hs400_enhanced_strobe =
dwcmshc_hs400_enhanced_strobe;
err = sdhci_add_host(host);
if (err)
goto err_clk;
priv->flags = drv_data->flags;
if (drv_data->flags & RK_PLATFROM) {
err = rockchip_pltf_init(host, priv);
@@ -420,10 +434,6 @@ static int dwcmshc_probe(struct platform_device *pdev)
goto err_clk;
}
err = sdhci_add_host(host);
if (err)
goto err_clk;
pm_runtime_get_noresume(&pdev->dev);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);