diff options
Diffstat (limited to 'drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c')
| -rw-r--r-- | drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c index c04eb3aeb834..6b60582ce8cf 100644 --- a/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c +++ b/drivers/net/ethernet/freescale/fs_enet/fs_enet-main.c @@ -999,6 +999,8 @@ static int fs_enet_probe(struct platform_device *ofdev) struct fs_enet_private *fep; struct fs_platform_info *fpi; const u32 *data; + struct clk *clk; + int err; const u8 *mac_addr; const char *phy_connection_type; int privsize, len, ret = -ENODEV; @@ -1036,6 +1038,20 @@ static int fs_enet_probe(struct platform_device *ofdev) fpi->use_rmii = 1; } + /* make clock lookup non-fatal (the driver is shared among platforms), + * but require enable to succeed when a clock was specified/found, + * keep a reference to the clock upon successful acquisition + */ + clk = devm_clk_get(&ofdev->dev, "per"); + if (!IS_ERR(clk)) { + err = clk_prepare_enable(clk); + if (err) { + ret = err; + goto out_free_fpi; + } + fpi->clk_per = clk; + } + privsize = sizeof(*fep) + sizeof(struct sk_buff **) * (fpi->rx_ring + fpi->tx_ring); @@ -1107,6 +1123,8 @@ out_free_dev: free_netdev(ndev); out_put: of_node_put(fpi->phy_node); + if (fpi->clk_per) + clk_disable_unprepare(fpi->clk_per); out_free_fpi: kfree(fpi); return ret; @@ -1123,6 +1141,8 @@ static int fs_enet_remove(struct platform_device *ofdev) fep->ops->cleanup_data(ndev); dev_set_drvdata(fep->dev, NULL); of_node_put(fep->fpi->phy_node); + if (fep->fpi->clk_per) + clk_disable_unprepare(fep->fpi->clk_per); free_netdev(ndev); return 0; } |