[PATCH v6 15/18] ata: ahci_platform: runtime resume the device before use
From: Hans de Goede <hidden>
Date: 2014-02-19 12:01:57
Also in:
linux-devicetree, linux-ide
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
From: Roger Quadros <redacted> 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 <redacted> Signed-off-by: Roger Quadros <redacted> Signed-off-by: Hans de Goede <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 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:
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1.8.5.3