[PATCH v4 3/3] ata: ahci_platform: runtime resume the device before use
From: Roger Quadros <hidden>
Date: 2014-01-09 10:57:13
Also in:
linux-ide, lkml
Subsystem:
libata sata ahci platform devices support, libata subsystem (serial and parallel ata drivers), the rest · Maintainers:
Hans de Goede, Damien Le Moal, Niklas Cassel, Linus Torvalds
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 during .remove() (i.e. ahci_host_stop()). We also update the runtime PM state during .resume(). Signed-off-by: Roger Quadros <redacted> Signed-off-by: Balaji T K <redacted> --- drivers/ata/ahci_platform.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index b476642..8a70e5b 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/pm_runtime.h> #include "ahci.h" static void ahci_host_stop(struct ata_host *host);
@@ -142,6 +143,9 @@ static int ahci_probe(struct platform_device *pdev) } } + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + hpriv->phy = devm_phy_get(dev, "sata-phy"); if (IS_ERR(hpriv->phy)) { rc = PTR_ERR(hpriv->phy);
@@ -287,6 +291,9 @@ static void ahci_host_stop(struct ata_host *host) clk_disable_unprepare(hpriv->clk); clk_put(hpriv->clk); } + + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); } #ifdef CONFIG_PM_SLEEP
@@ -358,6 +365,11 @@ static int ahci_resume(struct device *dev) ata_host_resume(host); + /* We resumed so update PM runtime state */ + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + return 0; disable_unprepare_clk:
--
1.8.3.2