02629d8f87
Targets were build tested and patches are refreshed. Signed-off-by: Luka Perkov <luka@openwrt.org> SVN-Revision: 42463
134 lines
3.6 KiB
Diff
134 lines
3.6 KiB
Diff
From 05b9b8d1035944af25694d2ebe53077cf1ccb067 Mon Sep 17 00:00:00 2001
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From: Roger Quadros <rogerq@ti.com>
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Date: Sat, 22 Feb 2014 16:53:40 +0100
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Subject: [PATCH 117/182] ata: ahci_platform: Manage SATA PHY
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Some platforms have a PHY hooked up to the SATA controller. The PHY
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needs to be initialized and powered up for SATA to work. We do that
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using the PHY framework.
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tj: Minor comment formatting updates.
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CC: Balaji T K <balajitk@ti.com>
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Signed-off-by: Roger Quadros <rogerq@ti.com>
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Signed-off-by: Tejun Heo<tj@kernel.org>
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---
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drivers/ata/ahci.h | 2 ++
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drivers/ata/ahci_platform.c | 47 +++++++++++++++++++++++++++++++++++++++++--
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2 files changed, 47 insertions(+), 2 deletions(-)
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--- a/drivers/ata/ahci.h
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+++ b/drivers/ata/ahci.h
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@@ -37,6 +37,7 @@
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#include <linux/clk.h>
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#include <linux/libata.h>
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+#include <linux/phy/phy.h>
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#include <linux/regulator/consumer.h>
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/* Enclosure Management Control */
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@@ -326,6 +327,7 @@ struct ahci_host_priv {
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u32 em_msg_type; /* EM message type */
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struct clk *clks[AHCI_MAX_CLKS]; /* Optional */
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struct regulator *target_pwr; /* Optional */
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+ struct phy *phy; /* If platform uses phy */
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void *plat_data; /* Other platform data */
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/*
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* Optional ahci_start_engine override, if not set this gets set to the
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--- a/drivers/ata/ahci_platform.c
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+++ b/drivers/ata/ahci_platform.c
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@@ -22,6 +22,7 @@
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#include <linux/platform_device.h>
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#include <linux/libata.h>
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#include <linux/ahci_platform.h>
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+#include <linux/phy/phy.h>
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#include "ahci.h"
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static void ahci_host_stop(struct ata_host *host);
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@@ -140,6 +141,7 @@ EXPORT_SYMBOL_GPL(ahci_platform_disable_
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* following order:
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* 1) Regulator
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* 2) Clocks (through ahci_platform_enable_clks)
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+ * 3) Phy
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*
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* If resource enabling fails at any point the previous enabled resources
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* are disabled in reverse order.
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@@ -161,8 +163,23 @@ int ahci_platform_enable_resources(struc
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if (rc)
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goto disable_regulator;
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+ if (hpriv->phy) {
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+ rc = phy_init(hpriv->phy);
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+ if (rc)
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+ goto disable_clks;
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+
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+ rc = phy_power_on(hpriv->phy);
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+ if (rc) {
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+ phy_exit(hpriv->phy);
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+ goto disable_clks;
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+ }
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+ }
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+
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return 0;
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+disable_clks:
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+ ahci_platform_disable_clks(hpriv);
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+
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disable_regulator:
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if (hpriv->target_pwr)
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regulator_disable(hpriv->target_pwr);
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@@ -176,11 +193,17 @@ EXPORT_SYMBOL_GPL(ahci_platform_enable_r
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*
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* This function disables all ahci_platform managed resources in the
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* following order:
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- * 1) Clocks (through ahci_platform_disable_clks)
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- * 2) Regulator
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+ * 1) Phy
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+ * 2) Clocks (through ahci_platform_disable_clks)
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+ * 3) Regulator
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*/
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void ahci_platform_disable_resources(struct ahci_host_priv *hpriv)
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{
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+ if (hpriv->phy) {
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+ phy_power_off(hpriv->phy);
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+ phy_exit(hpriv->phy);
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+ }
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+
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ahci_platform_disable_clks(hpriv);
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if (hpriv->target_pwr)
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@@ -208,6 +231,7 @@ static void ahci_platform_put_resources(
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* 2) regulator for controlling the targets power (optional)
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* 3) 0 - AHCI_MAX_CLKS clocks, as specified in the devs devicetree node,
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* or for non devicetree enabled platforms a single clock
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+ * 4) phy (optional)
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*
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* RETURNS:
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* The allocated ahci_host_priv on success, otherwise an ERR_PTR value
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@@ -266,6 +290,25 @@ struct ahci_host_priv *ahci_platform_get
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hpriv->clks[i] = clk;
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}
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+ hpriv->phy = devm_phy_get(dev, "sata-phy");
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+ if (IS_ERR(hpriv->phy)) {
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+ rc = PTR_ERR(hpriv->phy);
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+ switch (rc) {
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+ case -ENODEV:
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+ case -ENOSYS:
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+ /* continue normally */
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+ hpriv->phy = NULL;
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+ break;
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+
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+ case -EPROBE_DEFER:
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+ goto err_out;
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+
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+ default:
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+ dev_err(dev, "couldn't get sata-phy\n");
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+ goto err_out;
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+ }
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+ }
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+
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devres_remove_group(dev, NULL);
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return hpriv;
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