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realtek: rtl8231-aux: add RTL931x support

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

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/19776
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Markus Stockhausen 2025-08-14 07:13:49 -04:00 • committed by Hauke Mehrtens
parent 5dbf55bebb
commit 2cb7044f79
1 changed files with 13 additions and 1 deletions
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14
target/linux/realtek/patches-6.12/723-net-mdio-Add-Realtek-Otto-auxiliary-controller.patch
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@ -49,7 +49,7 @@ Signed-off-by: Sander Vanheule <sander@svanheule.net>
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 <sander@svanheule.net>
+#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 <sander@svanheule.net>
+ .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 <sander@svanheule.net>
+ .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);