mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
143 lines
3.8 KiB
Diff
143 lines
3.8 KiB
Diff
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
|
|
|