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mmc: sdhci-of-arasan: Use clock-frequency property to update clk_xin 

If clock-frequency property is set and it is not the same as the current
clock rate of clk_xin(base clock frequency), set clk_xin to use the
provided clock rate.

Signed-off-by: Rashmi A <rashmi.a@intel.com>
Reviewed-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Link: https://lore.kernel.org/r/20210603182242.25733-2-rashmi.a@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Rashmi A 2021-06-03 23:52:41 +05:30 committed by Ulf Hansson
parent 77347eda64
commit b2af322792
1 changed files with 12 additions and 2 deletions
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14
drivers/mmc/host/sdhci-of-arasan.c
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@ -1542,6 +1542,8 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
}
}
sdhci_get_of_property(pdev);
sdhci_arasan->clk_ahb = devm_clk_get(dev, "clk_ahb");
if (IS_ERR(sdhci_arasan->clk_ahb)) {
ret = dev_err_probe(dev, PTR_ERR(sdhci_arasan->clk_ahb),
@ -1561,14 +1563,22 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
goto err_pltfm_free;
}
/* If clock-frequency property is set, use the provided value */
if (pltfm_host->clock &&
pltfm_host->clock != clk_get_rate(clk_xin)) {
ret = clk_set_rate(clk_xin, pltfm_host->clock);
if (ret) {
dev_err(&pdev->dev, "Failed to set SD clock rate\n");
goto clk_dis_ahb;
}
}
ret = clk_prepare_enable(clk_xin);
if (ret) {
dev_err(dev, "Unable to enable SD clock.\n");
goto clk_dis_ahb;
}
sdhci_get_of_property(pdev);
if (of_property_read_bool(np, "xlnx,fails-without-test-cd"))
sdhci_arasan->quirks |= SDHCI_ARASAN_QUIRK_FORCE_CDTEST;