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driver: net: ethernet: davinci_mdio: runtime PM support 

Enabling runtime PM support for davinci mdio driver

Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mugunthan V N 2012-07-17 08:09:49 +00:00 committed by David S. Miller
parent ed36d7b257
commit 8e476d9da7
1 changed files with 12 additions and 13 deletions
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25
drivers/net/ethernet/ti/davinci_mdio.c
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@ -34,6 +34,7 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/davinci_emac.h>
/*
@ -321,7 +322,9 @@ static int __devinit davinci_mdio_probe(struct platform_device *pdev)
snprintf(data->bus->id, MII_BUS_ID_SIZE, "%s-%x",
pdev->name, pdev->id);
data->clk = clk_get(dev, NULL);
pm_runtime_enable(&pdev->dev);
pm_runtime_get_sync(&pdev->dev);
data->clk = clk_get(&pdev->dev, "fck");
if (IS_ERR(data->clk)) {
dev_err(dev, "failed to get device clock\n");
ret = PTR_ERR(data->clk);
@ -329,8 +332,6 @@ static int __devinit davinci_mdio_probe(struct platform_device *pdev)
goto bail_out;
}
clk_enable(data->clk);
dev_set_drvdata(dev, data);
data->dev = dev;
spin_lock_init(&data->lock);
@ -378,10 +379,10 @@ bail_out:
if (data->bus)
mdiobus_free(data->bus);
if (data->clk) {
clk_disable(data->clk);
if (data->clk)
clk_put(data->clk);
}
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
kfree(data);
@ -396,10 +397,10 @@ static int __devexit davinci_mdio_remove(struct platform_device *pdev)
if (data->bus)
mdiobus_free(data->bus);
if (data->clk) {
clk_disable(data->clk);
if (data->clk)
clk_put(data->clk);
}
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
dev_set_drvdata(dev, NULL);
@ -421,8 +422,7 @@ static int davinci_mdio_suspend(struct device *dev)
__raw_writel(ctrl, &data->regs->control);
wait_for_idle(data);
if (data->clk)
clk_disable(data->clk);
pm_runtime_put_sync(data->dev);
data->suspended = true;
spin_unlock(&data->lock);
@ -436,8 +436,7 @@ static int davinci_mdio_resume(struct device *dev)
u32 ctrl;
spin_lock(&data->lock);
if (data->clk)
clk_enable(data->clk);
pm_runtime_put_sync(data->dev);
/* restart the scan state machine */
ctrl = __raw_readl(&data->regs->control);