ipq806x: Add support for IPQ806x chip family

[openwrt/svn-archive/archive.git] / target / linux / ipq806x / patches / 0118-ata-ahci_platform-runtime-resume-the-device-before-u.patch

diff --git a/target/linux/ipq806x/patches/0118-ata-ahci_platform-runtime-resume-the-device-before-u.patch b/target/linux/ipq806x/patches/0118-ata-ahci_platform-runtime-resume-the-device-before-u.patch
new file mode 100644 (file)
index 0000000..2f3e707
--- /dev/null
+++ b/target/linux/ipq806x/patches/0118-ata-ahci_platform-runtime-resume-the-device-before-u.patch
@@ -0,0 +1,86 @@
+From abe309ab531f22b9b89329bd825606f6b68a95a1 Mon Sep 17 00:00:00 2001
+From: Roger Quadros <rogerq@ti.com>
+Date: Sat, 22 Feb 2014 16:53:41 +0100
+Subject: [PATCH 118/182] ata: ahci_platform: runtime resume the device before
+ use
+
+On OMAP platforms the device needs to be runtime resumed before it can
+be accessed. The OMAP HWMOD framework takes care of enabling the
+module and its resources based on the device's runtime PM state.
+
+In this patch we runtime resume during .probe() and runtime suspend
+after .remove().
+
+We also update the runtime PM state during .resume().
+
+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          |    1 +
+ drivers/ata/ahci_platform.c |   15 +++++++++++++++
+ 2 files changed, 16 insertions(+)
+
+diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
+index 3ab7ac9..51af275 100644
+--- a/drivers/ata/ahci.h
++++ b/drivers/ata/ahci.h
+@@ -324,6 +324,7 @@ struct ahci_host_priv {
+       u32                     em_loc; /* enclosure management location */
+       u32                     em_buf_sz;      /* EM buffer size in byte */
+       u32                     em_msg_type;    /* EM message type */
++      bool                    got_runtime_pm; /* Did we do pm_runtime_get? */
+       struct clk              *clks[AHCI_MAX_CLKS]; /* Optional */
+       struct regulator        *target_pwr;    /* Optional */
+       struct phy              *phy;           /* If platform uses phy */
+diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
+index 243dde3..fc32863 100644
+--- a/drivers/ata/ahci_platform.c
++++ b/drivers/ata/ahci_platform.c
+@@ -23,6 +23,7 @@
+ #include <linux/libata.h>
+ #include <linux/ahci_platform.h>
+ #include <linux/phy/phy.h>
++#include <linux/pm_runtime.h>
+ #include "ahci.h"
+ 
+ static void ahci_host_stop(struct ata_host *host);
+@@ -216,6 +217,11 @@ static void ahci_platform_put_resources(struct device *dev, void *res)
+       struct ahci_host_priv *hpriv = res;
+       int c;
+ 
++      if (hpriv->got_runtime_pm) {
++              pm_runtime_put_sync(dev);
++              pm_runtime_disable(dev);
++      }
++
+       for (c = 0; c < AHCI_MAX_CLKS && hpriv->clks[c]; c++)
+               clk_put(hpriv->clks[c]);
+ }
+@@ -309,6 +315,10 @@ struct ahci_host_priv *ahci_platform_get_resources(
+               }
+       }
+ 
++      pm_runtime_enable(dev);
++      pm_runtime_get_sync(dev);
++      hpriv->got_runtime_pm = true;
++
+       devres_remove_group(dev, NULL);
+       return hpriv;
+ 
+@@ -603,6 +613,11 @@ int ahci_platform_resume(struct device *dev)
+       if (rc)
+               goto disable_resources;
+ 
++      /* We resumed so update PM runtime state */
++      pm_runtime_disable(dev);
++      pm_runtime_set_active(dev);
++      pm_runtime_enable(dev);
++
+       return 0;
+ 
+ disable_resources:
+-- 
+1.7.10.4
+