3c1f6e358d
Patches are generated using the "format-patch" command from the following location: *https://www.codeaurora.org/cgit/quic/kernel/galak-msm/log/?h=apq_ipq_base *rev=0771849495b4128cac2faf7d49c85c729fc48b20 Patches numbered 76/77/102/103 have already been integrated in 3.14.12, so they're not in this list. All these patches are either integrated are pending integration into kernel.org, therefore these patches should go away once the kernel gets upgraded to 3.16. Support is currently limited to AP148 board but can be extended to other platforms in the future. These changes do not cover ethernet connectivity. Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org> SVN-Revision: 42334
141 lines
3.9 KiB
Diff
141 lines
3.9 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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diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
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index bf8100c..3ab7ac9 100644
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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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@@ -325,6 +326,7 @@ 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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diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
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index 968e7d9..243dde3 100644
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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_clks);
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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(struct ahci_host_priv *hpriv)
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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_resources);
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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(struct device *dev, void *res)
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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_resources(
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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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--
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1.7.10.4
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