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From 22885637d0976473b04d4bae191fcf88e28b3df5 Mon Sep 17 00:00:00 2001
From: Emil Renner Berthing <kernel@esmil.dk>
Date: Wed, 29 Sep 2021 20:50:22 +0200
Subject: [PATCH 1000/1024] net: stmmac: dwmac-starfive: Add JH7100 support
This adds support for setting the phy interface and delay chains on the
StarFive JH7100 SoC.
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
---
.../net/ethernet/stmicro/stmmac/dwmac-starfive.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-starfive.c
@@ -17,6 +17,10 @@
#define STARFIVE_DWMAC_PHY_INFT_RMII 0x4
#define STARFIVE_DWMAC_PHY_INFT_FIELD 0x7U
+#define JH7100_SYSMAIN_REGISTER28 0x70
+/* The value below is not a typo, just really bad naming by StarFive ¯\_(ツ)_/¯ */
+#define JH7100_SYSMAIN_REGISTER49 0xc8
+
struct starfive_dwmac {
struct device *dev;
struct clk *clk_tx;
@@ -56,6 +60,7 @@ static int starfive_dwmac_set_mode(struc
struct regmap *regmap;
unsigned int args[2];
unsigned int mode;
+ u32 gtxclk_dlychain;
int err;
switch (plat_dat->interface) {
@@ -65,6 +70,7 @@ static int starfive_dwmac_set_mode(struc
case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
mode = STARFIVE_DWMAC_PHY_INFT_RGMII;
break;
@@ -87,6 +93,12 @@ static int starfive_dwmac_set_mode(struc
if (err)
return dev_err_probe(dwmac->dev, err, "error setting phy mode\n");
+ if (!of_property_read_u32(dwmac->dev->of_node, "starfive,gtxclk-dlychain", >xclk_dlychain)) {
+ err = regmap_write(regmap, JH7100_SYSMAIN_REGISTER49, gtxclk_dlychain);
+ if (err)
+ return dev_err_probe(dwmac->dev, err, "error selecting gtxclk delay chain\n");
+ }
+
return 0;
}
@@ -149,6 +161,7 @@ static int starfive_dwmac_probe(struct p
}
static const struct of_device_id starfive_dwmac_match[] = {
+ { .compatible = "starfive,jh7100-dwmac" },
{ .compatible = "starfive,jh7110-dwmac" },
{ /* sentinel */ }
};
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