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authorMatthew Hagan <mnhagan88@gmail.com>2021-06-08 19:59:06 +0100
committerDavid S. Miller <davem@davemloft.net>2021-06-08 16:42:12 -0700
commite67f325e9cd67562b761e884680c0fec03a6f404 (patch)
treec416b275167245fa72edd139b24307af935933b1 /drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
parent52481e585951f4a199678cd6e61f85db52548a01 (diff)
downloadandroid-dev-e67f325e9cd67562b761e884680c0fec03a6f404.tar.gz
net: stmmac: explicitly deassert GMAC_AHB_RESET
We are currently assuming that GMAC_AHB_RESET will already be deasserted by the bootloader. However if this has not been done, probing of the GMAC will fail. To remedy this we must ensure GMAC_AHB_RESET has been deasserted prior to probing. v2 changes: - remove NULL condition check for stmmac_ahb_rst in stmmac_main.c - unwrap dev_err() message in stmmac_main.c - add PTR_ERR() around plat->stmmac_ahb_rst in stmmac_platform.c v3 changes: - add error pointer to dev_err() output - add reset_control_assert(stmmac_ahb_rst) in stmmac_dvr_remove - revert PTR_ERR() around plat->stmmac_ahb_rst since this is performed on the returned value of ret by the calling function Signed-off-by: Matthew Hagan <mnhagan88@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_main.c')
-rw-r--r--drivers/net/ethernet/stmicro/stmmac/stmmac_main.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index f2adff59b07d..1c881ec8cd04 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -6843,6 +6843,11 @@ int stmmac_dvr_probe(struct device *device,
reset_control_reset(priv->plat->stmmac_rst);
}
+ ret = reset_control_deassert(priv->plat->stmmac_ahb_rst);
+ if (ret == -ENOTSUPP)
+ dev_err(priv->device, "unable to bring out of ahb reset: %pe\n",
+ ERR_PTR(ret));
+
/* Init MAC and get the capabilities */
ret = stmmac_hw_init(priv);
if (ret)
@@ -7086,6 +7091,7 @@ int stmmac_dvr_remove(struct device *dev)
phylink_destroy(priv->phylink);
if (priv->plat->stmmac_rst)
reset_control_assert(priv->plat->stmmac_rst);
+ reset_control_assert(priv->plat->stmmac_ahb_rst);
pm_runtime_put(dev);
pm_runtime_disable(dev);
if (priv->hw->pcs != STMMAC_PCS_TBI &&