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From 133a9b75e2b0c48cd1d8f93b0ee61089821c32d9 Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wens@csie.org>
Date: Sat, 7 Dec 2013 01:29:34 +0800
Subject: [PATCH] net: stmmac: Enable stmmac main clock when probing hardware
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 24 +++++++++++++----------
1 file changed, 14 insertions(+), 10 deletions(-)
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -2680,10 +2680,17 @@ struct stmmac_priv *stmmac_dvr_probe(str
if ((phyaddr >= 0) && (phyaddr <= 31))
priv->plat->phy_addr = phyaddr;
+ priv->stmmac_clk = clk_get(priv->device, STMMAC_RESOURCE_NAME);
+ if (IS_ERR(priv->stmmac_clk)) {
+ pr_warn("%s: warning: cannot get CSR clock\n", __func__);
+ goto error_clk_get;
+ }
+ clk_prepare_enable(priv->stmmac_clk);
+
/* Init MAC and get the capabilities */
ret = stmmac_hw_init(priv);
if (ret)
- goto error_free_netdev;
+ goto error_hw_init;
ndev->netdev_ops = &stmmac_netdev_ops;
@@ -2721,12 +2728,6 @@ struct stmmac_priv *stmmac_dvr_probe(str
goto error_netdev_register;
}
- priv->stmmac_clk = clk_get(priv->device, STMMAC_RESOURCE_NAME);
- if (IS_ERR(priv->stmmac_clk)) {
- pr_warn("%s: warning: cannot get CSR clock\n", __func__);
- goto error_clk_get;
- }
-
/* If a specific clk_csr value is passed from the platform
* this means that the CSR Clock Range selection cannot be
* changed at run-time and it is fixed. Viceversa the driver'll try to
@@ -2751,15 +2752,18 @@ struct stmmac_priv *stmmac_dvr_probe(str
}
}
+ clk_disable_unprepare(priv->stmmac_clk);
+
return priv;
error_mdio_register:
- clk_put(priv->stmmac_clk);
-error_clk_get:
unregister_netdev(ndev);
error_netdev_register:
netif_napi_del(&priv->napi);
-error_free_netdev:
+error_hw_init:
+ clk_disable_unprepare(priv->stmmac_clk);
+ clk_put(priv->stmmac_clk);
+error_clk_get:
free_netdev(ndev);
return NULL;
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