mirror of https://github.com/hak5/openwrt.git
135 lines
3.6 KiB
Diff
135 lines
3.6 KiB
Diff
From 05b9b8d1035944af25694d2ebe53077cf1ccb067 Mon Sep 17 00:00:00 2001
|
|
From: Roger Quadros <rogerq@ti.com>
|
|
Date: Sat, 22 Feb 2014 16:53:40 +0100
|
|
Subject: [PATCH 117/182] 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.
|
|
|
|
tj: Minor comment formatting updates.
|
|
|
|
CC: Balaji T K <balajitk@ti.com>
|
|
Signed-off-by: Roger Quadros <rogerq@ti.com>
|
|
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
|
|
Signed-off-by: Tejun Heo<tj@kernel.org>
|
|
---
|
|
drivers/ata/ahci.h | 2 ++
|
|
drivers/ata/ahci_platform.c | 47 +++++++++++++++++++++++++++++++++++++++++--
|
|
2 files changed, 47 insertions(+), 2 deletions(-)
|
|
|
|
--- 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 */
|
|
@@ -326,6 +327,7 @@ 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
|
|
--- a/drivers/ata/ahci_platform.c
|
|
+++ b/drivers/ata/ahci_platform.c
|
|
@@ -22,6 +22,7 @@
|
|
#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);
|
|
@@ -140,6 +141,7 @@ EXPORT_SYMBOL_GPL(ahci_platform_disable_
|
|
* 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.
|
|
@@ -161,8 +163,23 @@ int ahci_platform_enable_resources(struc
|
|
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);
|
|
@@ -176,11 +193,17 @@ EXPORT_SYMBOL_GPL(ahci_platform_enable_r
|
|
*
|
|
* 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
|
|
*/
|
|
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)
|
|
@@ -208,6 +231,7 @@ static void ahci_platform_put_resources(
|
|
* 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)
|
|
*
|
|
* RETURNS:
|
|
* The allocated ahci_host_priv on success, otherwise an ERR_PTR value
|
|
@@ -266,6 +290,25 @@ struct ahci_host_priv *ahci_platform_get
|
|
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;
|
|
|