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| author | Jisheng Zhang <Jisheng.Zhang@synaptics.com> | 2020-05-15 14:19:26 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2020-05-28 11:22:14 +0200 |
| commit | bccce2ec77901c771cd7acd83cb99626ab1edf07 (patch) | |
| tree | 56143cbe5f68d34b6eee781ca1f9d3f91495b911 /drivers/mmc/host | |
| parent | 554232e8d59f3df842fdd9cc68a22e827b286d52 (diff) | |
| download | linux-bccce2ec77901c771cd7acd83cb99626ab1edf07.tar.bz2 | |
mmc: sdhci-of-dwcmshc: add suspend/resume support
Add dwcmshc specific system-level suspend and resume support.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Link: https://lore.kernel.org/r/20200515141926.52e088fe@xhacker.debian
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host')
| -rw-r--r-- | drivers/mmc/host/sdhci-of-dwcmshc.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c index a9ed0e006e06..64ac0dbee95c 100644 --- a/drivers/mmc/host/sdhci-of-dwcmshc.c +++ b/drivers/mmc/host/sdhci-of-dwcmshc.c @@ -163,6 +163,48 @@ static int dwcmshc_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int dwcmshc_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); + int ret; + + ret = sdhci_suspend_host(host); + if (ret) + return ret; + + clk_disable_unprepare(pltfm_host->clk); + if (!IS_ERR(priv->bus_clk)) + clk_disable_unprepare(priv->bus_clk); + + return ret; +} + +static int dwcmshc_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct dwcmshc_priv *priv = sdhci_pltfm_priv(pltfm_host); + int ret; + + ret = clk_prepare_enable(pltfm_host->clk); + if (ret) + return ret; + + if (!IS_ERR(priv->bus_clk)) { + ret = clk_prepare_enable(priv->bus_clk); + if (ret) + return ret; + } + + return sdhci_resume_host(host); +} +#endif + +static SIMPLE_DEV_PM_OPS(dwcmshc_pmops, dwcmshc_suspend, dwcmshc_resume); + static const struct of_device_id sdhci_dwcmshc_dt_ids[] = { { .compatible = "snps,dwcmshc-sdhci" }, {} @@ -173,6 +215,7 @@ static struct platform_driver sdhci_dwcmshc_driver = { .driver = { .name = "sdhci-dwcmshc", .of_match_table = sdhci_dwcmshc_dt_ids, + .pm = &dwcmshc_pmops, }, .probe = dwcmshc_probe, .remove = dwcmshc_remove, |