diff options
Diffstat (limited to 'target/linux/sunxi/patches-3.13/162-3-ahci-plat-runtime-resume.patch')
| -rw-r--r-- | target/linux/sunxi/patches-3.13/162-3-ahci-plat-runtime-resume.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.13/162-3-ahci-plat-runtime-resume.patch b/target/linux/sunxi/patches-3.13/162-3-ahci-plat-runtime-resume.patch new file mode 100644 index 0000000000..18953d1046 --- /dev/null +++ b/target/linux/sunxi/patches-3.13/162-3-ahci-plat-runtime-resume.patch @@ -0,0 +1,85 @@ +From 48379fed3987d587a25a48e155872e9d3125490d Mon Sep 17 00:00:00 2001 +From: Roger Quadros <rogerq@ti.com> +Date: Wed, 9 Oct 2013 15:08:59 +0300 +Subject: [PATCH] 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> +--- + 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..51af275b 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 99d38c1..75698a4 100644 +--- a/drivers/ata/ahci_platform.c ++++ b/drivers/ata/ahci_platform.c +@@ -24,6 +24,7 @@ + #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); +@@ -229,6 +230,11 @@ 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]); + } +@@ -326,6 +332,10 @@ 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; + +@@ -635,6 +645,11 @@ 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: +-- +1.8.5.5 + |