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| author | Daniil Stas <daniil.stas@posteo.net> | 2021-05-23 22:24:48 +0000 |
|---|---|---|
| committer | Ramon Fried <rfried.dev@gmail.com> | 2021-06-18 11:29:17 +0300 |
| commit | 07292f8e51dfc9a8f4065e08144955eebff88944 (patch) | |
| tree | ea2e4ada8dffe81e5f1b1f728204c64b24f93b15 /drivers | |
| parent | 70018635969987c1224b27f62c851ac70264f272 (diff) | |
| download | u-boot-07292f8e51dfc9a8f4065e08144955eebff88944.tar.gz u-boot-07292f8e51dfc9a8f4065e08144955eebff88944.tar.bz2 u-boot-07292f8e51dfc9a8f4065e08144955eebff88944.zip | |
net: dwc_eth_qos: Fix needless phy auto-negotiation restarts
Disabling clk_ck clock leads to link up status loss in phy, which
leads to auto-negotiation restart before each network command
execution.
This issue is especially big for PXE boot protocol because of
auto-negotiation restarts before each configuration filename trial.
To avoid this issue don't disable clk_ck clock after it was enabled.
Signed-off-by: Daniil Stas <daniil.stas@posteo.net>
Cc: Ramon Fried <rfried.dev@gmail.com>
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Cc: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/dwc_eth_qos.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/net/dwc_eth_qos.c b/drivers/net/dwc_eth_qos.c index e8242ca4e1..2f088c758f 100644 --- a/drivers/net/dwc_eth_qos.c +++ b/drivers/net/dwc_eth_qos.c @@ -321,6 +321,7 @@ struct eqos_priv { void *rx_pkt; bool started; bool reg_access_ok; + bool clk_ck_enabled; }; /* @@ -591,12 +592,13 @@ static int eqos_start_clks_stm32(struct udevice *dev) goto err_disable_clk_rx; } - if (clk_valid(&eqos->clk_ck)) { + if (clk_valid(&eqos->clk_ck) && !eqos->clk_ck_enabled) { ret = clk_enable(&eqos->clk_ck); if (ret < 0) { pr_err("clk_enable(clk_ck) failed: %d", ret); goto err_disable_clk_tx; } + eqos->clk_ck_enabled = true; } #endif @@ -648,8 +650,6 @@ static void eqos_stop_clks_stm32(struct udevice *dev) clk_disable(&eqos->clk_tx); clk_disable(&eqos->clk_rx); clk_disable(&eqos->clk_master_bus); - if (clk_valid(&eqos->clk_ck)) - clk_disable(&eqos->clk_ck); #endif debug("%s: OK\n", __func__); |