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71 lines
2.2 KiB
71 lines
2.2 KiB
From 133a9b75e2b0c48cd1d8f93b0ee61089821c32d9 Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Sat, 7 Dec 2013 01:29:34 +0800
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Subject: [PATCH] net: stmmac: Enable stmmac main clock when probing hardware
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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---
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 24 +++++++++++++----------
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1 file changed, 14 insertions(+), 10 deletions(-)
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diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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index 8a7a23a..4d75cba 100644
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--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
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@@ -2682,10 +2682,17 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
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if ((phyaddr >= 0) && (phyaddr <= 31))
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priv->plat->phy_addr = phyaddr;
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+ priv->stmmac_clk = clk_get(priv->device, STMMAC_RESOURCE_NAME);
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+ if (IS_ERR(priv->stmmac_clk)) {
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+ pr_warn("%s: warning: cannot get CSR clock\n", __func__);
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+ goto error_clk_get;
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+ }
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+ clk_prepare_enable(priv->stmmac_clk);
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+
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/* Init MAC and get the capabilities */
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ret = stmmac_hw_init(priv);
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if (ret)
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- goto error_free_netdev;
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+ goto error_hw_init;
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ndev->netdev_ops = &stmmac_netdev_ops;
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@@ -2723,12 +2730,6 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
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goto error_netdev_register;
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}
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- priv->stmmac_clk = clk_get(priv->device, STMMAC_RESOURCE_NAME);
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- if (IS_ERR(priv->stmmac_clk)) {
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- pr_warn("%s: warning: cannot get CSR clock\n", __func__);
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- goto error_clk_get;
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- }
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-
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/* If a specific clk_csr value is passed from the platform
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* this means that the CSR Clock Range selection cannot be
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* changed at run-time and it is fixed. Viceversa the driver'll try to
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@@ -2753,15 +2754,18 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
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}
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}
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+ clk_disable_unprepare(priv->stmmac_clk);
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+
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return priv;
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error_mdio_register:
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- clk_put(priv->stmmac_clk);
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-error_clk_get:
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unregister_netdev(ndev);
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error_netdev_register:
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netif_napi_del(&priv->napi);
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-error_free_netdev:
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+error_hw_init:
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+ clk_disable_unprepare(priv->stmmac_clk);
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+ clk_put(priv->stmmac_clk);
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+error_clk_get:
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free_netdev(ndev);
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return NULL;
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--
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1.8.5.1
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