lkml.org 
[lkml]   [2021]   [Jan]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 4/5] net: stmmac: dwmac-meson8b: move RGMII delays into a separate function
Date
Newer SoCs starting with the Amlogic Meson G12A have more a precise
RGMII RX delay configuration register. This means more complexity in the
code. Extract the existing RGMII delay configuration code into a
separate function to make it easier to read/understand even when adding
more logic in the future.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
index d2be3a7bd8fd..4937432ac70d 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
@@ -268,7 +268,7 @@ static int meson8b_devm_clk_prepare_enable(struct meson8b_dwmac *dwmac,
return 0;
}

-static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
+static int meson8b_init_rgmii_delays(struct meson8b_dwmac *dwmac)
{
u32 tx_dly_config, rx_dly_config, delay_config;
int ret;
@@ -323,6 +323,13 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
PRG_ETH0_ADJ_DELAY | PRG_ETH0_ADJ_SKEW,
delay_config);

+ return 0;
+}
+
+static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
+{
+ int ret;
+
if (phy_interface_mode_is_rgmii(dwmac->phy_mode)) {
/* only relevant for RMII mode -> disable in RGMII mode */
meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
@@ -430,6 +437,10 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
goto err_remove_config_dt;
}

+ ret = meson8b_init_rgmii_delays(dwmac);
+ if (ret)
+ goto err_remove_config_dt;
+
ret = meson8b_init_rgmii_tx_clk(dwmac);
if (ret)
goto err_remove_config_dt;
--
2.30.0
\
 
 \ /
  Last update: 2021-01-06 14:47    [W:0.074 / U:0.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site