diff options
author | Mugunthan V N <mugunthanvnm@ti.com> | 2012-07-17 08:09:50 +0000 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2012-07-18 09:40:54 -0700 |
commit | f150bd7f8cf742c4cdd0c929aa494ef72f7f5b13 (patch) | |
tree | 26c51841e1f97ffd2f9ad29a5a159b9b58a94d2a | |
parent | 8e476d9da7e28199b1316fca69a01920694e1876 (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.c | 23 |
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; |