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Commit bcda6ff8 authored by Rabin Vincent's avatar Rabin Vincent Committed by Grant Likely
Browse files

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: default avatarRabin Vincent <rabin.vincent@stericsson.com>
Reviewed-by: default avatarVirupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com>
Reviewed-by: default avatarJonas Aberg <jonas.aberg@stericsson.com>
Reviewed-by: default avatarSrinidhi Kasagar <srinidhi.kasagar@stericsson.com>
[Rebased to Linux 3.0-rc3, edit description]
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 083be3f0

drivers/spi/spi-pl022.c

+6 −0
Original line number Diff line number Diff line
@@ -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 @@ static void giveback(struct pl022 *pl022) 
	clk_disable(pl022->clk);

	amba_pclk_disable(pl022->adev);

	amba_vcore_disable(pl022->adev);

	pm_runtime_put(&pl022->adev->dev);

}



/**
@@ -1542,6 +1544,7 @@ static void pump_messages(struct work_struct *work) 
	 * 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 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) 
	}

	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 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) 
	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: