From: Balaji T K <balajitk@xxxxxx> Some platforms have a PHY hooked up to the SATA controller. The PHY needs to be initialized and powered up for SATA to work. We do that using the PHY framework. [Roger Q] Cleaned up. CC: Tejun Heo <tj@xxxxxxxxxx> Signed-off-by: Balaji T K <balajitk@xxxxxx> Signed-off-by: Roger Quadros <rogerq@xxxxxx> --- .../devicetree/bindings/ata/ahci-platform.txt | 3 +- drivers/ata/ahci.h | 2 ++ drivers/ata/ahci_platform.c | 29 +++++++++++++++++++- 3 files changed, 32 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/ata/ahci-platform.txt b/Documentation/devicetree/bindings/ata/ahci-platform.txt index 89de156..c8a6cea 100644 --- a/Documentation/devicetree/bindings/ata/ahci-platform.txt +++ b/Documentation/devicetree/bindings/ata/ahci-platform.txt @@ -4,7 +4,8 @@ SATA nodes are defined to describe on-chip Serial ATA controllers. Each SATA controller should have its own node. Required properties: -- compatible : compatible list, contains "snps,spear-ahci" +- compatible : compatible list, contains "snps,spear-ahci", + snps,exynos5440-ahci or "snps,dwc-ahci" - interrupts : <interrupt mapping for SATA IRQ> - reg : <registers mapping> diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h index 1145637..94484cb 100644 --- a/drivers/ata/ahci.h +++ b/drivers/ata/ahci.h @@ -37,6 +37,7 @@ #include <linux/clk.h> #include <linux/libata.h> +#include <linux/phy/phy.h> /* Enclosure Management Control */ #define EM_CTRL_MSG_TYPE 0x000f0000 @@ -322,6 +323,7 @@ struct ahci_host_priv { u32 em_buf_sz; /* EM buffer size in byte */ u32 em_msg_type; /* EM message type */ struct clk *clk; /* Only for platforms supporting clk */ + struct phy *phy; /* If platforms use phy */ void *plat_data; /* Other platform data */ }; diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c index 2daaee0..5a0f1418 100644 --- a/drivers/ata/ahci_platform.c +++ b/drivers/ata/ahci_platform.c @@ -141,6 +141,21 @@ static int ahci_probe(struct platform_device *pdev) } } + hpriv->phy = devm_phy_get(dev, "sata-phy"); + if (IS_ERR(hpriv->phy)) { + dev_dbg(dev, "can't get sata-phy\n"); + /* return only if -EPROBE_DEFER */ + if (PTR_ERR(hpriv->phy) == -EPROBE_DEFER) { + rc = -EPROBE_DEFER; + goto disable_unprepare_clk; + } + } + + if (!IS_ERR(hpriv->phy)) { + phy_init(hpriv->phy); + phy_power_on(hpriv->phy); + } + /* * Some platforms might need to prepare for mmio region access, * which could be done in the following init call. So, the mmio @@ -150,7 +165,7 @@ static int ahci_probe(struct platform_device *pdev) if (pdata && pdata->init) { rc = pdata->init(dev, hpriv->mmio); if (rc) - goto disable_unprepare_clk; + goto disable_phy; } ahci_save_initial_config(dev, hpriv, @@ -220,6 +235,12 @@ static int ahci_probe(struct platform_device *pdev) pdata_exit: if (pdata && pdata->exit) pdata->exit(dev); +disable_phy: + if (!IS_ERR(hpriv->phy)) { + phy_power_off(hpriv->phy); + phy_exit(hpriv->phy); + } + disable_unprepare_clk: if (!IS_ERR(hpriv->clk)) clk_disable_unprepare(hpriv->clk); @@ -238,6 +259,11 @@ static void ahci_host_stop(struct ata_host *host) if (pdata && pdata->exit) pdata->exit(dev); + if (!IS_ERR(hpriv->phy)) { + phy_power_off(hpriv->phy); + phy_exit(hpriv->phy); + } + if (!IS_ERR(hpriv->clk)) { clk_disable_unprepare(hpriv->clk); clk_put(hpriv->clk); @@ -328,6 +354,7 @@ static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_suspend, ahci_resume); static const struct of_device_id ahci_of_match[] = { { .compatible = "snps,spear-ahci", }, { .compatible = "snps,exynos5440-ahci", }, + { .compatible = "snps,dwc-ahci", }, {}, }; MODULE_DEVICE_TABLE(of, ahci_of_match); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html