From: Roger Quadros <[email protected]> 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(). CC: Balaji T K <[email protected]> Signed-off-by: Roger Quadros <[email protected]> Signed-off-by: Hans de Goede <[email protected]> --- 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 f8ef780..bb2e7ab 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); @@ -234,6 +235,9 @@ struct ahci_host_priv *ahci_platform_get_resources( } } + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + return hpriv; free_clk: @@ -248,6 +252,9 @@ void ahci_platform_put_resources(struct device *dev, { int c; + 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]); } @@ -480,6 +487,11 @@ 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: -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
