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mmc: sdhci-xenon: use clk only with DT

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As a preparation for supporting ACPI, modify the driver
to use the clk framework only when booting with DT -
otherwise rely on the configuration done by firmware.
For that purpose introduce also a custom SDHCI get_max_clock
callback.

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Link: https://lore.kernel.org/r/20201204171626.10935-4-mw@semihalf.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Marcin Wojtas 2020-12-04 18:16:25 +01:00 committed by Ulf Hansson
parent f29bf660bf
commit 1542488031
1 changed files with 32 additions and 19 deletions
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51
drivers/mmc/host/sdhci-xenon.c
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@ -247,6 +247,16 @@ static void xenon_voltage_switch(struct sdhci_host *host)
sdhci_readw(host, SDHCI_HOST_CONTROL2);
}
static unsigned int xenon_get_max_clock(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
if (pltfm_host->clk)
return sdhci_pltfm_clk_get_max_clock(host);
else
return pltfm_host->clock;
}
static const struct sdhci_ops sdhci_xenon_ops = {
.voltage_switch = xenon_voltage_switch,
.set_clock = sdhci_set_clock,
@ -254,7 +264,7 @@ static const struct sdhci_ops sdhci_xenon_ops = {
.set_bus_width = sdhci_set_bus_width,
.reset = xenon_reset,
.set_uhs_signaling = xenon_set_uhs_signaling,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
.get_max_clock = xenon_get_max_clock,
};
static const struct sdhci_pltfm_data sdhci_xenon_pdata = {
@ -483,6 +493,7 @@ static void xenon_sdhc_unprepare(struct sdhci_host *host)
static int xenon_probe(struct platform_device *pdev)
{
struct sdhci_pltfm_host *pltfm_host;
struct device *dev = &pdev->dev;
struct sdhci_host *host;
struct xenon_priv *priv;
int err;
@ -503,25 +514,27 @@ static int xenon_probe(struct platform_device *pdev)
*/
xenon_replace_mmc_host_ops(host);
pltfm_host->clk = devm_clk_get(&pdev->dev, "core");
if (IS_ERR(pltfm_host->clk)) {
err = PTR_ERR(pltfm_host->clk);
dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);
goto free_pltfm;
}
err = clk_prepare_enable(pltfm_host->clk);
if (err)
goto free_pltfm;
priv->axi_clk = devm_clk_get(&pdev->dev, "axi");
if (IS_ERR(priv->axi_clk)) {
err = PTR_ERR(priv->axi_clk);
if (err == -EPROBE_DEFER)
goto err_clk;
} else {
err = clk_prepare_enable(priv->axi_clk);
if (dev->of_node) {
pltfm_host->clk = devm_clk_get(&pdev->dev, "core");
if (IS_ERR(pltfm_host->clk)) {
err = PTR_ERR(pltfm_host->clk);
dev_err(&pdev->dev, "Failed to setup input clk: %d\n", err);
goto free_pltfm;
}
err = clk_prepare_enable(pltfm_host->clk);
if (err)
goto err_clk;
goto free_pltfm;
priv->axi_clk = devm_clk_get(&pdev->dev, "axi");
if (IS_ERR(priv->axi_clk)) {
err = PTR_ERR(priv->axi_clk);
if (err == -EPROBE_DEFER)
goto err_clk;
} else {
err = clk_prepare_enable(priv->axi_clk);
if (err)
goto err_clk;
}
}
err = mmc_of_parse(host->mmc);