diff options
| -rw-r--r-- | drivers/mmc/host/sdhci-cadence.c | 106 |
1 files changed, 97 insertions, 9 deletions
diff --git a/drivers/mmc/host/sdhci-cadence.c b/drivers/mmc/host/sdhci-cadence.c index 19d5698..3dca3b3 100644 --- a/drivers/mmc/host/sdhci-cadence.c +++ b/drivers/mmc/host/sdhci-cadence.c @@ -67,9 +67,16 @@ */ #define SDHCI_CDNS_MAX_TUNING_LOOP 40 +struct sdhci_cdns_phy_param { + u8 addr; + u8 data; +}; + struct sdhci_cdns_priv { void __iomem *hrs_addr; bool enhanced_strobe; + unsigned int nr_phy_params; + struct sdhci_cdns_phy_param phy_params[0]; }; struct sdhci_cdns_phy_cfg { @@ -115,9 +122,22 @@ static int sdhci_cdns_write_phy_reg(struct sdhci_cdns_priv *priv, return 0; } -static int sdhci_cdns_phy_init(struct device_node *np, - struct sdhci_cdns_priv *priv) +static unsigned int sdhci_cdns_phy_param_count(struct device_node *np) { + unsigned int count = 0; + int i; + + for (i = 0; i < ARRAY_SIZE(sdhci_cdns_phy_cfgs); i++) + if (of_property_read_bool(np, sdhci_cdns_phy_cfgs[i].property)) + count++; + + return count; +} + +static void sdhci_cdns_phy_param_parse(struct device_node *np, + struct sdhci_cdns_priv *priv) +{ + struct sdhci_cdns_phy_param *p = priv->phy_params; u32 val; int ret, i; @@ -127,9 +147,19 @@ static int sdhci_cdns_phy_init(struct device_node *np, if (ret) continue; - ret = sdhci_cdns_write_phy_reg(priv, - sdhci_cdns_phy_cfgs[i].addr, - val); + p->addr = sdhci_cdns_phy_cfgs[i].addr; + p->data = val; + p++; + } +} + +static int sdhci_cdns_phy_init(struct sdhci_cdns_priv *priv) +{ + int ret, i; + + for (i = 0; i < priv->nr_phy_params; i++) { + ret = sdhci_cdns_write_phy_reg(priv, priv->phy_params[i].addr, + priv->phy_params[i].data); if (ret) return ret; } @@ -302,6 +332,8 @@ static int sdhci_cdns_probe(struct platform_device *pdev) struct sdhci_pltfm_host *pltfm_host; struct sdhci_cdns_priv *priv; struct clk *clk; + size_t priv_size; + unsigned int nr_phy_params; int ret; struct device *dev = &pdev->dev; @@ -313,7 +345,9 @@ static int sdhci_cdns_probe(struct platform_device *pdev) if (ret) return ret; - host = sdhci_pltfm_init(pdev, &sdhci_cdns_pltfm_data, sizeof(*priv)); + nr_phy_params = sdhci_cdns_phy_param_count(dev->of_node); + priv_size = sizeof(*priv) + sizeof(priv->phy_params[0]) * nr_phy_params; + host = sdhci_pltfm_init(pdev, &sdhci_cdns_pltfm_data, priv_size); if (IS_ERR(host)) { ret = PTR_ERR(host); goto disable_clk; @@ -322,7 +356,8 @@ static int sdhci_cdns_probe(struct platform_device *pdev) pltfm_host = sdhci_priv(host); pltfm_host->clk = clk; - priv = sdhci_cdns_priv(host); + priv = sdhci_pltfm_priv(pltfm_host); + priv->nr_phy_params = nr_phy_params; priv->hrs_addr = host->ioaddr; priv->enhanced_strobe = false; host->ioaddr += SDHCI_CDNS_SRS_BASE; @@ -336,7 +371,9 @@ static int sdhci_cdns_probe(struct platform_device *pdev) if (ret) goto free; - ret = sdhci_cdns_phy_init(dev->of_node, priv); + sdhci_cdns_phy_param_parse(dev->of_node, priv); + + ret = sdhci_cdns_phy_init(priv); if (ret) goto free; @@ -353,6 +390,57 @@ disable_clk: return ret; } +#ifdef CONFIG_PM_SLEEP +static int sdhci_cdns_suspend(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + int ret; + + if (host->tuning_mode != SDHCI_TUNING_MODE_3) + mmc_retune_needed(host->mmc); + + ret = sdhci_suspend_host(host); + if (ret) + return ret; + + clk_disable_unprepare(pltfm_host->clk); + + return 0; +} + +static int sdhci_cdns_resume(struct device *dev) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_cdns_priv *priv = sdhci_pltfm_priv(pltfm_host); + int ret; + + ret = clk_prepare_enable(pltfm_host->clk); + if (ret) + return ret; + + ret = sdhci_cdns_phy_init(priv); + if (ret) + goto disable_clk; + + ret = sdhci_resume_host(host); + if (ret) + goto disable_clk; + + return 0; + +disable_clk: + clk_disable_unprepare(pltfm_host->clk); + + return ret; +} +#endif + +static const struct dev_pm_ops sdhci_cdns_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(sdhci_cdns_suspend, sdhci_cdns_resume) +}; + static const struct of_device_id sdhci_cdns_match[] = { { .compatible = "socionext,uniphier-sd4hc" }, { .compatible = "cdns,sd4hc" }, @@ -363,7 +451,7 @@ MODULE_DEVICE_TABLE(of, sdhci_cdns_match); static struct platform_driver sdhci_cdns_driver = { .driver = { .name = "sdhci-cdns", - .pm = &sdhci_pltfm_pmops, + .pm = &sdhci_cdns_pm_ops, .of_match_table = sdhci_cdns_match, }, .probe = sdhci_cdns_probe, |
