realtek: rtl8231-aux: add RTL931x support

The auxiliary RTL8231 controller driver is missing RTL931x support.
Add it by defining the proper register and matching compatible.

Signed-off-by: Markus Stockhausen <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/19776
Signed-off-by: Hauke Mehrtens <[email protected]>

target/linux/realtek/patches-6.12/723-net-mdio-Add-Realtek-Otto-auxiliary-controller.patch

@@ -49,7 +49,7 @@ Signed-off-by: Sander Vanheule <[email protected]>
  obj-$(CONFIG_MDIO_THUNDER)		+= mdio-thunder.o
 --- /dev/null
 +++ b/drivers/net/mdio/mdio-realtek-otto-aux.c
-@@ -0,0 +1,175 @@
+@@ -0,0 +1,187 @@
 +// SPDX-License-Identifier: GPL-2.0-or-later
 +
 +#include <linux/mfd/core.h>
@@ -65,6 +65,7 @@ Signed-off-by: Sander Vanheule <[email protected]>
 +#define RTL8380_EXT_GPIO_INDIRECT_ACCESS	0xA09C
 +#define RTL8390_EXT_GPIO_INDIRECT_ACCESS	0x0224
 +#define RTL9300_EXT_GPIO_INDIRECT_ACCESS	0xC620
++#define RTL9310_EXT_GPIO_INDIRECT_ACCESS	0x07F4
 +
 +#define RTL83XX_AUX_MDIO_DATA_OFFSET		16
 +#define RTL83XX_AUX_MDIO_RCMD_FAIL		0
@@ -106,6 +107,13 @@ Signed-off-by: Sander Vanheule <[email protected]>
 +	.timeout_us = 19000,
 +};
 +
++static const struct realtek_aux_mdio_info info_rtl931x = {
++	.cmd_reg = RTL9310_EXT_GPIO_INDIRECT_ACCESS,
++	.data_offset = RTL93XX_AUX_MDIO_DATA_OFFSET,
++	.rcmd_fail_mask = RTL93XX_AUX_MDIO_RCMD_FAIL,
++	.timeout_us = 19000,
++};
++
 +struct realtek_aux_mdio_ctrl {
 +	struct device *dev;
 +	struct regmap *map;
@@ -209,6 +217,10 @@ Signed-off-by: Sander Vanheule <[email protected]>
 +		.compatible = "realtek,rtl9300-aux-mdio",
 +		.data = &info_rtl930x,
 +	},
++	{
++		.compatible = "realtek,rtl9310-aux-mdio",
++		.data = &info_rtl931x,
++	},
 +	{ /* sentinel */ }
 +};
 +MODULE_DEVICE_TABLE(of, realtek_aux_mdio_of_match);