Add Runtime PM support to C_CAN/D_CAN controller. The runtime PM
APIs control clocks for C_CAN/D_CAN IP and prevent access to the
register of C_CAN/D_CAN IP when clock is turned off.
Signed-off-by: AnilKumar Ch <anilku...@ti.com>
---
drivers/net/can/c_can/c_can_platform.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/net/can/c_can/c_can_platform.c
b/drivers/net/can/c_can/c_can_platform.c
index d0a66cf..83a1e17 100644
--- a/drivers/net/can/c_can/c_can_platform.c
+++ b/drivers/net/can/c_can/c_can_platform.c
@@ -32,6 +32,7 @@
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
#include <linux/can/dev.h>
@@ -177,6 +178,9 @@ static int __devinit c_can_plat_probe(struct
platform_device *pdev)
goto exit_free_device;
}
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_get_sync(&pdev->dev);
+
dev->irq = irq;
priv->base = addr;
priv->can.clock.freq = clk_get_rate(clk);
@@ -198,6 +202,8 @@ static int __devinit c_can_plat_probe(struct
platform_device *pdev)
exit_free_device:
platform_set_drvdata(pdev, NULL);
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
free_c_can_dev(dev);
exit_iounmap:
iounmap(addr);
@@ -226,6 +232,8 @@ static int __devexit c_can_plat_remove(struct
platform_device *pdev)
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(mem->start, resource_size(mem));
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
clk_put(priv->priv);
return 0;
--
1.7.9.5
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