From: Roger Quadros <[email protected]> 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.
CC: Balaji T K <[email protected]> Signed-off-by: Roger Quadros <[email protected]> Signed-off-by: Hans de Goede <[email protected]> --- drivers/ata/Kconfig | 1 + drivers/ata/ahci_platform.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/ahci.h | 2 ++ 3 files changed, 43 insertions(+) diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig index cc67cc0..96176f4 100644 --- a/drivers/ata/Kconfig +++ b/drivers/ata/Kconfig @@ -91,6 +91,7 @@ config SATA_AHCI config SATA_AHCI_PLATFORM tristate "Platform AHCI SATA support" + depends on GENERIC_PHY || !GENERIC_PHY help This option enables support for Platform AHCI Serial ATA controllers. diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c index 962ec25..073931a 100644 --- a/drivers/ata/ahci_platform.c +++ b/drivers/ata/ahci_platform.c @@ -23,6 +23,7 @@ #include <linux/platform_device.h> #include <linux/libata.h> #include <linux/ahci_platform.h> +#include <linux/phy/phy.h> #include "ahci.h" static void ahci_host_stop(struct ata_host *host); @@ -131,8 +132,23 @@ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv) if (rc) goto disable_regulator; + if (hpriv->phy) { + rc = phy_init(hpriv->phy); + if (rc) + goto disable_clks; + + rc = phy_power_on(hpriv->phy); + if (rc) { + phy_exit(hpriv->phy); + goto disable_clks; + } + } + return 0; +disable_clks: + ahci_platform_disable_clks(hpriv); + disable_regulator: if (hpriv->target_pwr) regulator_disable(hpriv->target_pwr); @@ -142,6 +158,11 @@ EXPORT_SYMBOL_GPL(ahci_platform_enable_resources); void ahci_platform_disable_resources(struct ahci_host_priv *hpriv) { + if (hpriv->phy) { + phy_power_off(hpriv->phy); + phy_exit(hpriv->phy); + } + ahci_platform_disable_clks(hpriv); if (hpriv->target_pwr) @@ -194,6 +215,25 @@ struct ahci_host_priv *ahci_platform_get_resources( hpriv->clks[i] = clk; } + hpriv->phy = devm_phy_get(dev, "sata-phy"); + if (IS_ERR(hpriv->phy)) { + rc = PTR_ERR(hpriv->phy); + switch (rc) { + case -ENODEV: + case -ENOSYS: + /* continue normally */ + hpriv->phy = NULL; + break; + + case -EPROBE_DEFER: + goto free_clk; + + default: + dev_err(dev, "couldn't get sata-phy\n"); + goto free_clk; + } + } + return hpriv; free_clk: diff --git a/include/linux/ahci.h b/include/linux/ahci.h index ac69cdc..8fbe3d7 100644 --- a/include/linux/ahci.h +++ b/include/linux/ahci.h @@ -23,6 +23,7 @@ #include <linux/clk.h> #include <linux/regulator/consumer.h> +#include <linux/phy/phy.h> #define AHCI_MAX_CLKS 3 @@ -42,6 +43,7 @@ struct ahci_host_priv { u32 em_msg_type; /* EM message type */ struct clk *clks[AHCI_MAX_CLKS]; /* Optional */ struct regulator *target_pwr; /* Optional */ + struct phy *phy; /* If platform uses phy */ void *plat_data; /* Other platform data */ /* Optional ahci_start_engine override */ void (*start_engine)(struct ata_port *ap); -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
