[EXT] [PATCH net] net: stmmac: update Rx clk divider for 10M SGMII

[Suman Ghosh]

Hi Sneh,

>----------------------------------------------------------------------
>SGMII 10MBPS mode needs RX clock divider to avoid drops in Rx.
>Update configure SGMII function with rx clk divider programming.
>
[Suman] You need to add the Fixes tag as well.
>Signed-off-by: Sneh Shah <quic_snehshah at quicinc.com>
>---
> drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 3 +++
> 1 file changed, 3 insertions(+)
>
>diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
>b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
>index d3bf42d0fceb..f8c42e91a624 100644
>--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
>+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
>@@ -34,6 +34,7 @@
> #define RGMII_CONFIG_LOOPBACK_EN		BIT(2)
> #define RGMII_CONFIG_PROG_SWAP			BIT(1)
> #define RGMII_CONFIG_DDR_MODE			BIT(0)
>+#define RGMII_CONFIG_SGMII_CLK_DVDR		GENMASK(18, 10)
>
> /* SDCC_HC_REG_DLL_CONFIG fields */
> #define SDCC_DLL_CONFIG_DLL_RST			BIT(30)
>@@ -617,6 +618,8 @@ static int ethqos_configure_sgmii(struct qcom_ethqos
>*ethqos)
> 	case SPEED_10:
> 		val |= ETHQOS_MAC_CTRL_PORT_SEL;
> 		val &= ~ETHQOS_MAC_CTRL_SPEED_MODE;
>+		rgmii_updatel(ethqos, RGMII_CONFIG_SGMII_CLK_DVDR, BIT(10) |
>+			      GENMASK(15, 14), RGMII_IO_MACRO_CONFIG);
> 		break;
> 	}
>
>--
>2.17.1
>