diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2026-02-03 14:29:01 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-13 17:20:36 +0100 |
| commit | 5d219040ee7b750feccc9f3e6397a860952b2b66 (patch) | |
| tree | 5f1bf742d6c42953dea27b286a079c3bfd4ce738 | |
| parent | 4d1ea0416384494ffe3f0211f5e801696a2adf2b (diff) | |
net: stmmac: dwmac-loongson: Set clk_csr_i to 100-150MHz
commit e1aa5ef892fb4fa9014a25e87b64b97347919d37 upstream.
Current clk_csr_i setting of Loongson STMMAC (including LS7A1000/2000
and LS2K1000/2000/3000) are copy & paste from other drivers. In fact,
Loongson STMMAC use 125MHz clocks and need 62 freq division to within
2.5MHz, meeting most PHY MDC requirement. So fix by setting clk_csr_i
to 100-150MHz, otherwise some PHYs may link fail.
Cc: stable@vger.kernel.org
Fixes: 30bba69d7db40e7 ("stmmac: pci: Add dwmac support for Loongson")
Signed-off-by: Hongliang Wang <wanghongliang@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Link: https://patch.msgid.link/20260203062901.2158236-1-chenhuacai@loongson.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c index 702ea5a00b56..aced7589d20d 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c @@ -86,7 +86,7 @@ static void loongson_default_data(struct pci_dev *pdev, /* Get bus_id, this can be overwritten later */ plat->bus_id = pci_dev_id(pdev); - plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */ + plat->clk_csr = 1; /* clk_csr_i = 100-150MHz & MDC = clk_csr_i/62 */ plat->has_gmac = 1; plat->force_sf_dma_mode = 1; |