diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.13/162-2-ahci-plat-manage-sata-phy.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.13/162-2-ahci-plat-manage-sata-phy.patch | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.13/162-2-ahci-plat-manage-sata-phy.patch b/target/linux/sunxi/patches-3.13/162-2-ahci-plat-manage-sata-phy.patch new file mode 100644 index 0000000000..1ab704beda --- /dev/null +++ b/target/linux/sunxi/patches-3.13/162-2-ahci-plat-manage-sata-phy.patch @@ -0,0 +1,142 @@ +From 154a670a945c54300749d5ba008f30bbd6089017 Mon Sep 17 00:00:00 2001 +From: Roger Quadros <rogerq@ti.com> +Date: Mon, 27 Jan 2014 16:41:18 +0200 +Subject: [PATCH] ata: ahci_platform: Manage SATA PHY + +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 <balajitk@ti.com> +Signed-off-by: Roger Quadros <rogerq@ti.com> +Signed-off-by: Hans de Goede <hdegoede@redhat.com> +--- + drivers/ata/ahci.h | 2 ++ + drivers/ata/ahci_platform.c | 47 +++++++++++++++++++++++++++++++++++++++++++-- + 2 files changed, 47 insertions(+), 2 deletions(-) + +diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h +index bf8100c..3ab7ac9 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> + #include <linux/regulator/consumer.h> + + /* Enclosure Management Control */ +@@ -325,6 +326,7 @@ 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, if not set this gets set to the +diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c +index d7e55ba..99d38c1 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); +@@ -147,6 +148,7 @@ void ahci_platform_disable_clks(struct ahci_host_priv *hpriv) + * the following order: + * 1) Regulator + * 2) Clocks (through ahci_platform_enable_clks) ++ * 3) Phy + * + * If resource enabling fails at any point the previous enabled + * resources are disabled in reverse order. +@@ -171,8 +173,23 @@ 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); +@@ -186,14 +203,20 @@ int ahci_platform_enable_resources(struct ahci_host_priv *hpriv) + * + * This function disables all ahci_platform managed resources in + * the following order: +- * 1) Clocks (through ahci_platform_disable_clks) +- * 2) Regulator ++ * 1) Phy ++ * 2) Clocks (through ahci_platform_disable_clks) ++ * 3) Regulator + * + * LOCKING: + * None. + */ + 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) +@@ -222,6 +245,7 @@ static void ahci_platform_put_resources(struct device *dev, void *res) + * 2) regulator for controlling the targets power (optional) + * 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node, + * or for non devicetree enabled platforms a single clock ++ * 4) phy (optional) + * + * LOCKING: + * None. +@@ -283,6 +307,25 @@ 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 err_out; ++ ++ default: ++ dev_err(dev, "couldn't get sata-phy\n"); ++ goto err_out; ++ } ++ } ++ + devres_remove_group(dev, NULL); + return hpriv; + +-- +1.8.5.5 + |