diff options
author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2022-03-02 16:09:50 +0530 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2022-03-03 10:14:06 +0000 |
commit | a7bf6d7c9249946996bc622a7a8584f2c48ea372 (patch) | |
tree | 008492245a802e4ed534ed8bb095dd24eb68e087 /drivers | |
parent | d90b3120473a770a10d81dd633e8e475ea86f944 (diff) | |
download | linux-a7bf6d7c9249946996bc622a7a8584f2c48ea372.tar.bz2 |
net: stmmac: dwmac-qcom-ethqos: Adjust rgmii loopback_en per platform
Not all platforms should have RGMII_CONFIG_LOOPBACK_EN and the result it
about 50% packet loss on incoming messages. So make it possile to
configure this per compatible and enable it for QCS404.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c index 8cdba9d521ec..0cc28c79cc61 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c @@ -78,6 +78,7 @@ struct ethqos_emac_por { struct ethqos_emac_driver_data { const struct ethqos_emac_por *por; unsigned int num_por; + bool rgmii_config_looback_en; }; struct qcom_ethqos { @@ -90,6 +91,7 @@ struct qcom_ethqos { const struct ethqos_emac_por *por; unsigned int num_por; + bool rgmii_config_looback_en; }; static int rgmii_readl(struct qcom_ethqos *ethqos, unsigned int offset) @@ -181,6 +183,7 @@ static const struct ethqos_emac_por emac_v2_3_0_por[] = { static const struct ethqos_emac_driver_data emac_v2_3_0_data = { .por = emac_v2_3_0_por, .num_por = ARRAY_SIZE(emac_v2_3_0_por), + .rgmii_config_looback_en = true, }; static const struct ethqos_emac_por emac_v2_1_0_por[] = { @@ -195,6 +198,7 @@ static const struct ethqos_emac_por emac_v2_1_0_por[] = { static const struct ethqos_emac_driver_data emac_v2_1_0_data = { .por = emac_v2_1_0_por, .num_por = ARRAY_SIZE(emac_v2_1_0_por), + .rgmii_config_looback_en = false, }; static int ethqos_dll_configure(struct qcom_ethqos *ethqos) @@ -311,8 +315,12 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) rgmii_updatel(ethqos, SDCC_DDR_CONFIG_PRG_DLY_EN, SDCC_DDR_CONFIG_PRG_DLY_EN, SDCC_HC_REG_DDR_CONFIG); - rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, - RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG); + if (ethqos->rgmii_config_looback_en) + rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, + RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG); + else + rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, + 0, RGMII_IO_MACRO_CONFIG); break; case SPEED_100: @@ -345,8 +353,13 @@ static int ethqos_rgmii_macro_init(struct qcom_ethqos *ethqos) rgmii_updatel(ethqos, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN, SDCC_DDR_CONFIG_EXT_PRG_RCLK_DLY_EN, SDCC_HC_REG_DDR_CONFIG); - rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, - RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG); + if (ethqos->rgmii_config_looback_en) + rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, + RGMII_CONFIG_LOOPBACK_EN, RGMII_IO_MACRO_CONFIG); + else + rgmii_updatel(ethqos, RGMII_CONFIG_LOOPBACK_EN, + 0, RGMII_IO_MACRO_CONFIG); + break; case SPEED_10: @@ -518,6 +531,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev) data = of_device_get_match_data(&pdev->dev); ethqos->por = data->por; ethqos->num_por = data->num_por; + ethqos->rgmii_config_looback_en = data->rgmii_config_looback_en; ethqos->rgmii_clk = devm_clk_get(&pdev->dev, "rgmii"); if (IS_ERR(ethqos->rgmii_clk)) { |