97 lines
3.1 KiB
Diff
97 lines
3.1 KiB
Diff
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From 62866e98737e77c87f9dec99edea76ab54360770 Mon Sep 17 00:00:00 2001
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From: Chen-Yu Tsai <wens@csie.org>
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Date: Fri, 17 Jan 2014 21:24:40 +0800
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Subject: [PATCH] net: stmmac: Enable stmmac main clock when probing hardware
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The stmmac driver does not enable the main clock during the probe phase.
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If the clock was not enabled by the boot loader or was disabled by the
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kernel, hardware features and the MDIO bus would not be probed properly.
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Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 26 +++++++++++------------
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1 file changed, 13 insertions(+), 13 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 cddcf76..0d2c4cb 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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@@ -1680,8 +1680,6 @@ static int stmmac_open(struct net_device *dev)
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struct stmmac_priv *priv = netdev_priv(dev);
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int ret;
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- clk_prepare_enable(priv->stmmac_clk);
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-
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stmmac_check_ether_addr(priv);
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if (priv->pcs != STMMAC_PCS_RGMII && priv->pcs != STMMAC_PCS_TBI &&
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@@ -1819,7 +1817,6 @@ static int stmmac_release(struct net_device *dev)
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#ifdef CONFIG_STMMAC_DEBUG_FS
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stmmac_exit_fs();
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#endif
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- clk_disable_unprepare(priv->stmmac_clk);
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stmmac_release_ptp(priv);
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@@ -2727,10 +2724,18 @@ 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 = devm_clk_get(priv->device, STMMAC_RESOURCE_NAME);
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+ if (IS_ERR(priv->stmmac_clk)) {
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+ dev_warn(priv->device, "%s: warning: cannot get CSR clock\n",
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+ __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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@@ -2768,12 +2773,6 @@ 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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@@ -2801,12 +2800,12 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device,
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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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+error_clk_get:
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free_netdev(ndev);
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return NULL;
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@@ -2833,6 +2832,7 @@ int stmmac_dvr_remove(struct net_device *ndev)
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stmmac_mdio_unregister(ndev);
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netif_carrier_off(ndev);
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unregister_netdev(ndev);
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+ clk_disable_unprepare(priv->stmmac_clk);
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free_netdev(ndev);
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return 0;
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--
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1.8.5.5
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