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authorMugunthan V N <mugunthanvnm@ti.com>2012-07-17 08:09:50 +0000
committerDavid S. Miller <davem@davemloft.net>2012-07-18 09:40:54 -0700
commitf150bd7f8cf742c4cdd0c929aa494ef72f7f5b13 (patch)
tree26c51841e1f97ffd2f9ad29a5a159b9b58a94d2a
parent8e476d9da7e28199b1316fca69a01920694e1876 (diff)
driver: net: ethernet: cpsw: runtime PM support
Enabling runtime PM support for cpsw driver Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/ti/cpsw.c23
1 files changed, 14 insertions, 9 deletions
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index ca381d3f9fa8..1e5d85b06e71 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -27,6 +27,7 @@
#include <linux/phy.h>
#include <linux/workqueue.h>
#include <linux/delay.h>
+#include <linux/pm_runtime.h>
#include <linux/platform_data/cpsw.h>
@@ -494,11 +495,7 @@ static int cpsw_ndo_open(struct net_device *ndev)
cpsw_intr_disable(priv);
netif_carrier_off(ndev);
- ret = clk_enable(priv->clk);
- if (ret < 0) {
- dev_err(priv->dev, "unable to turn on device clock\n");
- return ret;
- }
+ pm_runtime_get_sync(&priv->pdev->dev);
reg = __raw_readl(&priv->regs->id_ver);
@@ -569,7 +566,7 @@ static int cpsw_ndo_stop(struct net_device *ndev)
netif_carrier_off(priv->ndev);
cpsw_ale_stop(priv->ale);
for_each_slave(priv, cpsw_slave_stop, priv);
- clk_disable(priv->clk);
+ pm_runtime_put_sync(&priv->pdev->dev);
return 0;
}
@@ -763,10 +760,12 @@ static int __devinit cpsw_probe(struct platform_device *pdev)
for (i = 0; i < data->slaves; i++)
priv->slaves[i].slave_num = i;
- priv->clk = clk_get(&pdev->dev, NULL);
+ pm_runtime_enable(&pdev->dev);
+ priv->clk = clk_get(&pdev->dev, "fck");
if (IS_ERR(priv->clk)) {
- dev_err(priv->dev, "failed to get device clock)\n");
- ret = -EBUSY;
+ dev_err(&pdev->dev, "fck is not found\n");
+ ret = -ENODEV;
+ goto clean_slave_ret;
}
priv->cpsw_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -935,6 +934,8 @@ clean_cpsw_iores_ret:
resource_size(priv->cpsw_res));
clean_clk_ret:
clk_put(priv->clk);
+clean_slave_ret:
+ pm_runtime_disable(&pdev->dev);
kfree(priv->slaves);
clean_ndev_ret:
free_netdev(ndev);
@@ -959,6 +960,7 @@ static int __devexit cpsw_remove(struct platform_device *pdev)
resource_size(priv->cpsw_res));
release_mem_region(priv->cpsw_ss_res->start,
resource_size(priv->cpsw_ss_res));
+ pm_runtime_disable(&pdev->dev);
clk_put(priv->clk);
kfree(priv->slaves);
free_netdev(ndev);
@@ -973,6 +975,8 @@ static int cpsw_suspend(struct device *dev)
if (netif_running(ndev))
cpsw_ndo_stop(ndev);
+ pm_runtime_put_sync(&pdev->dev);
+
return 0;
}
@@ -981,6 +985,7 @@ static int cpsw_resume(struct device *dev)
struct platform_device *pdev = to_platform_device(dev);
struct net_device *ndev = platform_get_drvdata(pdev);
+ pm_runtime_get_sync(&pdev->dev);
if (netif_running(ndev))
cpsw_ndo_open(ndev);
return 0;