diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-omap.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-omap.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c index 882053151a47..1ec74c2d5c17 100644 --- a/drivers/mmc/host/sdhci-omap.c +++ b/drivers/mmc/host/sdhci-omap.c @@ -108,6 +108,11 @@ struct sdhci_omap_host { struct pinctrl *pinctrl; struct pinctrl_state **pinctrl_state; bool is_tuning; + /* Omap specific context save */ + u32 con; + u32 hctl; + u32 sysctl; + u32 capa; }; static void sdhci_omap_start_clock(struct sdhci_omap_host *omap_host); @@ -1192,6 +1197,9 @@ static int sdhci_omap_probe(struct platform_device *pdev) if (of_find_property(dev->of_node, "dmas", NULL)) sdhci_switch_external_dma(host, true); + /* R1B responses is required to properly manage HW busy detection. */ + mmc->caps |= MMC_CAP_NEED_RSP_BUSY; + ret = sdhci_setup_host(host); if (ret) goto err_put_sync; @@ -1232,12 +1240,64 @@ static int sdhci_omap_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_PM_SLEEP +static void sdhci_omap_context_save(struct sdhci_omap_host *omap_host) +{ + omap_host->con = sdhci_omap_readl(omap_host, SDHCI_OMAP_CON); + omap_host->hctl = sdhci_omap_readl(omap_host, SDHCI_OMAP_HCTL); + omap_host->capa = sdhci_omap_readl(omap_host, SDHCI_OMAP_CAPA); +} + +static void sdhci_omap_context_restore(struct sdhci_omap_host *omap_host) +{ + sdhci_omap_writel(omap_host, SDHCI_OMAP_CON, omap_host->con); + sdhci_omap_writel(omap_host, SDHCI_OMAP_HCTL, omap_host->hctl); + sdhci_omap_writel(omap_host, SDHCI_OMAP_CAPA, omap_host->capa); +} + +static int __maybe_unused sdhci_omap_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + + sdhci_suspend_host(host); + + sdhci_omap_context_save(omap_host); + + pinctrl_pm_select_idle_state(dev); + + pm_runtime_force_suspend(dev); + + return 0; +} + +static int __maybe_unused sdhci_omap_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + + pm_runtime_force_resume(dev); + + pinctrl_pm_select_default_state(dev); + + sdhci_omap_context_restore(omap_host); + + sdhci_resume_host(host); + + return 0; +} +#endif +static SIMPLE_DEV_PM_OPS(sdhci_omap_dev_pm_ops, sdhci_omap_suspend, + sdhci_omap_resume); static struct platform_driver sdhci_omap_driver = { .probe = sdhci_omap_probe, .remove = sdhci_omap_remove, .driver = { .name = "sdhci-omap", + .pm = &sdhci_omap_dev_pm_ops, .of_match_table = omap_sdhci_match, }, }; |