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realtek: carve out mdio bus from ethernet driver

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So much code was distributed between phy/ethernet/dsa drivers. A lot
was already cleand up before. With this step the mdio bus gets its
own space and is no longer hidden inside the ethernet driver.

This commit is mostly a copy/paste that includes only minor changes.

- define prefixes are renamed to RTMDIO
- The driver is totally self contained (does not rely on SoC include)
- The DTS structure (mdio node below ethernet node) was kept
- The driver is added to the kernel config of all subtargets.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19942
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2025-09-03 04:16:31 -04:00 • committed by Robert Marko
parent 3fae46d5cc
commit fcd3ce6954
10 changed files with 1681 additions and 1666 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1650
target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.c
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16
target/linux/realtek/files-6.12/drivers/net/ethernet/rtl838x_eth.h
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@ -454,20 +454,4 @@ struct rtl838x_eth_reg {
bool (*decode_tag)(struct p_hdr *h, struct dsa_tag *tag);
};
int phy_package_port_read_paged(struct phy_device *phydev, int port, int page, u32 regnum);
int phy_package_port_write_paged(struct phy_device *phydev, int port, int page, u32 regnum, u16 val);
int phy_package_read_paged(struct phy_device *phydev, int page, u32 regnum);
int phy_package_write_paged(struct phy_device *phydev, int page, u32 regnum, u16 val);
int phy_port_read_paged(struct phy_device *phydev, int port, int page, u32 regnum);
int phy_port_write_paged(struct phy_device *phydev, int port, int page, u32 regnum, u16 val);
int rtmdio_838x_read_phy(u32 port, u32 page, u32 reg, u32 *val);
int rtmdio_838x_write_phy(u32 port, u32 page, u32 reg, u32 val);
int rtmdio_930x_read_sds_phy(int sds, int page, int regnum);
int rtmdio_930x_write_sds_phy(int sds, int page, int regnum, u16 val);
int rtmdio_931x_read_sds_phy_new(int sds, int page, int regnum);
int rtmdio_931x_write_sds_phy_new(int sds, int page, int regnum, u16 val);
#endif /* _RTL838X_ETH_H */

1641
target/linux/realtek/files-6.12/drivers/net/mdio/mdio-realtek-otto.c Normal file
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34
target/linux/realtek/patches-6.12/806-add-mdio-driver.patch Normal file
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@ -0,0 +1,34 @@
From 5b38f63ee59afd95c1d265b7e2097a0958db8a61 Mon Sep 01 00:00:00 2025
From: Markus Stockhausen <markus.stockhausen@gmx.de>
Date: Mon, 01 Sep 2025 20:13:21 +0200
Subject: realtek: add support for mdio controller
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
---
--- a/drivers/net/mdio/Makefile
+++ b/drivers/net/mdio/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_MDIO_MSCC_MIIM) += mdio-ms
obj-$(CONFIG_MDIO_MVUSB) += mdio-mvusb.o
obj-$(CONFIG_MDIO_OCTEON) += mdio-octeon.o
obj-$(CONFIG_MDIO_REGMAP) += mdio-regmap.o
+obj-$(CONFIG_MDIO_REALTEK_OTTO) += mdio-realtek-otto.o
obj-$(CONFIG_MDIO_REALTEK_OTTO_AUX) += mdio-realtek-otto-aux.o
obj-$(CONFIG_MDIO_SMBUS) += mdio-smbus.o
obj-$(CONFIG_MDIO_SUN4I) += mdio-sun4i.o
--- a/drivers/net/mdio/Kconfig
+++ b/drivers/net/mdio/Kconfig
@@ -207,6 +207,13 @@ config MDIO_REGMAP
regmap. Users willing to use this driver must explicitly select
REGMAP.
+config MDIO_REALTEK_OTTO
+ tristate "Realtek Otto MDIO interface support"
+ default MACH_REALTEK_RTL
+ depends on MACH_REALTEK_RTL || COMPILE_TEST
+ help
+ This driver supports the MDIO bus on RTL83xx/RTL93xx SoCs.
+
config MDIO_REALTEK_OTTO_AUX
tristate "Realtek Otto auxiliary MDIO interface support"
default MACH_REALTEK_RTL

1
target/linux/realtek/rtl838x/config-6.12
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@ -134,6 +134,7 @@ CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_DEVRES=y
CONFIG_MDIO_GPIO=y
CONFIG_MDIO_I2C=y
CONFIG_MDIO_REALTEK_OTTO=y
CONFIG_MDIO_REALTEK_OTTO_AUX=y
CONFIG_MDIO_SMBUS=y
CONFIG_MFD_CORE=y

1
target/linux/realtek/rtl839x/config-6.12
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@ -132,6 +132,7 @@ CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_DEVRES=y
CONFIG_MDIO_I2C=y
CONFIG_MDIO_REALTEK_OTTO=y
CONFIG_MDIO_REALTEK_OTTO_AUX=y
CONFIG_MDIO_SMBUS=y
CONFIG_MFD_CORE=y

1
target/linux/realtek/rtl930x/config-6.12
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@ -116,6 +116,7 @@ CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_DEVRES=y
CONFIG_MDIO_I2C=y
CONFIG_MDIO_REALTEK_OTTO=y
CONFIG_MDIO_REALTEK_OTTO_AUX=y
CONFIG_MDIO_SMBUS=y
CONFIG_MFD_RTL8231=y

1
target/linux/realtek/rtl930x_nand/config-6.12
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@ -116,6 +116,7 @@ CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_DEVRES=y
CONFIG_MDIO_I2C=y
CONFIG_MDIO_REALTEK_OTTO=y
CONFIG_MDIO_REALTEK_OTTO_AUX=y
CONFIG_MDIO_SMBUS=y
CONFIG_MFD_RTL8231=y

1
target/linux/realtek/rtl931x/config-6.12
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@ -121,6 +121,7 @@ CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_DEVRES=y
CONFIG_MDIO_I2C=y
CONFIG_MDIO_REALTEK_OTTO=y
CONFIG_MDIO_REALTEK_OTTO_AUX=y
CONFIG_MDIO_SMBUS=y
CONFIG_MFD_RTL8231=y

1
target/linux/realtek/rtl931x_nand/config-6.12
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@ -121,6 +121,7 @@ CONFIG_MDIO_BUS=y
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_DEVRES=y
CONFIG_MDIO_I2C=y
CONFIG_MDIO_REALTEK_OTTO=y
CONFIG_MDIO_REALTEK_OTTO_AUX=y
CONFIG_MDIO_SMBUS=y
CONFIG_MFD_RTL8231=y