diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_main.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 0d2c4cb0996b..0c5c1208900e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -51,6 +51,7 @@ #include <linux/net_tstamp.h> #include "stmmac_ptp.h" #include "stmmac.h" +#include <linux/reset.h> #define STMMAC_ALIGN(x) L1_CACHE_ALIGN(x) #define JUMBO_LEN 9000 @@ -2728,10 +2729,24 @@ struct stmmac_priv *stmmac_dvr_probe(struct device *device, if (IS_ERR(priv->stmmac_clk)) { dev_warn(priv->device, "%s: warning: cannot get CSR clock\n", __func__); + ret = PTR_ERR(priv->stmmac_clk); goto error_clk_get; } clk_prepare_enable(priv->stmmac_clk); + priv->stmmac_rst = devm_reset_control_get(priv->device, + STMMAC_RESOURCE_NAME); + if (IS_ERR(priv->stmmac_rst)) { + if (PTR_ERR(priv->stmmac_rst) == -EPROBE_DEFER) { + ret = -EPROBE_DEFER; + goto error_hw_init; + } + dev_info(priv->device, "no reset control found\n"); + priv->stmmac_rst = NULL; + } + if (priv->stmmac_rst) + reset_control_deassert(priv->stmmac_rst); + /* Init MAC and get the capabilities */ ret = stmmac_hw_init(priv); if (ret) @@ -2808,7 +2823,7 @@ error_hw_init: error_clk_get: free_netdev(ndev); - return NULL; + return ERR_PTR(ret); } /** @@ -2832,6 +2847,8 @@ int stmmac_dvr_remove(struct net_device *ndev) stmmac_mdio_unregister(ndev); netif_carrier_off(ndev); unregister_netdev(ndev); + if (priv->stmmac_rst) + reset_control_assert(priv->stmmac_rst); clk_disable_unprepare(priv->stmmac_clk); free_netdev(ndev); |