spi/pl022: support runtime PM
Insert notifiers for the runtime PM API. With this the runtime
PM layer kicks in to action where used.
Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Reviewed-by: Jonas Aberg <jonas.aberg@stericsson.com>
Reviewed-by: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
[Rebased to Linux 3.0-rc3, edit description]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
diff --git a/drivers/spi/spi-pl022.c b/drivers/spi/spi-pl022.c
index f4b7b72..5079ff1 100644
--- a/drivers/spi/spi-pl022.c
+++ b/drivers/spi/spi-pl022.c
@@ -40,6 +40,7 @@
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
#include <linux/scatterlist.h>
+#include <linux/pm_runtime.h>
/*
* This macro is used to define some register default values.
@@ -517,6 +518,7 @@
clk_disable(pl022->clk);
amba_pclk_disable(pl022->adev);
amba_vcore_disable(pl022->adev);
+ pm_runtime_put(&pl022->adev->dev);
}
/**
@@ -1542,6 +1544,7 @@
* and core will be disabled when giveback() is called in each method
* (poll/interrupt/DMA)
*/
+ pm_runtime_get_sync(&pl022->adev->dev);
amba_vcore_enable(pl022->adev);
amba_pclk_enable(pl022->adev);
clk_enable(pl022->clk);
@@ -2142,6 +2145,8 @@
}
printk(KERN_INFO "pl022: mapped registers from 0x%08x to %p\n",
adev->res.start, pl022->virtbase);
+ pm_runtime_enable(dev);
+ pm_runtime_resume(dev);
pl022->clk = clk_get(&adev->dev, NULL);
if (IS_ERR(pl022->clk)) {
@@ -2203,6 +2208,7 @@
destroy_queue(pl022);
pl022_dma_remove(pl022);
free_irq(adev->irq[0], pl022);
+ pm_runtime_disable(&adev->dev);
err_no_irq:
clk_put(pl022->clk);
err_no_clk:
