[openwrt/openwrt] ramips: pinctrl: allow mux SDXC pins for mt76x8

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/05ec3b50a8e673786dda0224b23f18b5d96a4a65

commit 05ec3b50a8e673786dda0224b23f18b5d96a4a65
Author: Shiji Yang <yangshiji66 at qq.com>
AuthorDate: Wed Jan 1 16:06:10 2025 +0800

    ramips: pinctrl: allow mux SDXC pins for mt76x8
    
    The mt76x8 SDXC pin register definition is incompatible with the
    mtmips generic pinctrl driver structure. This hack allows us to
    mux the SDXC IO to different pin groups in device tree.
    
    Signed-off-by: Shiji Yang <yangshiji66 at qq.com>
    Link: https://github.com/openwrt/openwrt/pull/17446
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 ...trl-mtmips-allow-mux-SDXC-pins-for-mt76x8.patch | 105 +++++++++++++++++++++
 1 file changed, 105 insertions(+)

diff --git a/target/linux/ramips/patches-6.6/809-pinctrl-mtmips-allow-mux-SDXC-pins-for-mt76x8.patch b/target/linux/ramips/patches-6.6/809-pinctrl-mtmips-allow-mux-SDXC-pins-for-mt76x8.patch
new file mode 100644
index 0000000000..69dcd7fb2c
--- /dev/null
+++ b/target/linux/ramips/patches-6.6/809-pinctrl-mtmips-allow-mux-SDXC-pins-for-mt76x8.patch
@@ -0,0 +1,105 @@
+From: Shiji Yang <yangshiji66 at outlook.com>
+Date: Wed, 1 Jan 2025 13:30:11 +0800
+Subject: [PATCH] pinctrl: mtmips: allow mux SDXC pins for mt76x8
+
+This is a hack to supprot two types of mt76x8 SDXC pinmaps:
+
+a) Use ethernet phy pins as SDXC IO.
+
+&pinctrl {
+	ephy-digital;
+
+	sdxc_iot_mode: sdxc_iot_mode {
+		esd {
+			groups = "esd";
+			function = "iot";
+		};
+
+		sdxc {
+			groups = "sdmode";
+			function = "sdxc";
+		};
+	};
+};
+
+b) Use I2S/I2C/GPIO0/UART1 pins as SDXC IO.
+
+&pinctrl {
+	ephy-analog;
+
+	sdxc_router_mode: sdxc_router_mode {
+		groups = "esd", "gpio", "i2c", "i2s", "sdmode", "uart1";
+		function = "gpio";
+	};
+};
+
+Signed-off-by: Shiji Yang <yangshiji66 at outlook.com>
+---
+ drivers/pinctrl/mediatek/pinctrl-mt76x8.c | 24 ++++++++++++++++++++++-
+ 1 file changed, 22 insertions(+), 1 deletion(-)
+
+--- a/drivers/pinctrl/mediatek/pinctrl-mt76x8.c
++++ b/drivers/pinctrl/mediatek/pinctrl-mt76x8.c
+@@ -1,10 +1,13 @@
+ // SPDX-License-Identifier: GPL-2.0-only
+ 
++#include <asm/mach-ralink/ralink_regs.h>
+ #include <linux/module.h>
+ #include <linux/platform_device.h>
+ #include <linux/of.h>
+ #include "pinctrl-mtmips.h"
+ 
++#define SYSC_REG_AGPIO_CFG		0x3c
++
+ #define MT76X8_GPIO_MODE_MASK		0x3
+ 
+ #define MT76X8_GPIO_MODE_P4LED_KN	58
+@@ -26,6 +29,7 @@
+ #define MT76X8_GPIO_MODE_I2C		20
+ #define MT76X8_GPIO_MODE_REFCLK		18
+ #define MT76X8_GPIO_MODE_PERST		16
++#define MT76X8_GPIO_MODE_ESD		15
+ #define MT76X8_GPIO_MODE_WDT		14
+ #define MT76X8_GPIO_MODE_SPI		12
+ #define MT76X8_GPIO_MODE_SDMODE		10
+@@ -74,6 +78,12 @@ static struct mtmips_pmx_func refclk_grp
+ static struct mtmips_pmx_func perst_grp[] = { FUNC("perst", 0, 36, 1) };
+ static struct mtmips_pmx_func wdt_grp[] = { FUNC("wdt", 0, 38, 1) };
+ static struct mtmips_pmx_func spi_grp[] = { FUNC("spi", 0, 7, 4) };
++/*
++ * "esd" (Ethernet SDXC) group supports two mode:
++ * "gpio" - SDXC mux to I2S/I2C/GPIO0/UART1 pins with "gpio" mode
++ * "iot"  - SDXC mux to EPHY pins, eth p1-p4 pad must be set to "digital"
++ */
++static struct mtmips_pmx_func esd_grp[] = { FUNC("iot", 0, 47, 1) };
+ 
+ static struct mtmips_pmx_func sd_mode_grp[] = {
+ 	FUNC("jtag", 3, 22, 8),
+@@ -216,6 +226,7 @@ static struct mtmips_pmx_group mt76x8_pi
+ 	GRP("perst", perst_grp, 1, MT76X8_GPIO_MODE_PERST),
+ 	GRP("wdt", wdt_grp, 1, MT76X8_GPIO_MODE_WDT),
+ 	GRP("spi", spi_grp, 1, MT76X8_GPIO_MODE_SPI),
++	GRP("esd", esd_grp, 1, MT76X8_GPIO_MODE_ESD),
+ 	GRP_G("sdmode", sd_mode_grp, MT76X8_GPIO_MODE_MASK,
+ 				1, MT76X8_GPIO_MODE_SDMODE),
+ 	GRP_G("uart0", uart0_grp, MT76X8_GPIO_MODE_MASK,
+@@ -257,7 +268,18 @@ static struct mtmips_pmx_group mt76x8_pi
+ 
+ static int mt76x8_pinctrl_probe(struct platform_device *pdev)
+ {
+-	return mtmips_pinctrl_init(pdev, mt76x8_pinmux_data);
++	int ret;
++
++	ret = mtmips_pinctrl_init(pdev, mt76x8_pinmux_data);
++	if (ret)
++		return ret;
++
++	if (of_property_present(pdev->dev.of_node, "ephy-analog"))
++		rt_sysc_m32(0xf << 17, 0, SYSC_REG_AGPIO_CFG);
++	else if (of_property_present(pdev->dev.of_node, "ephy-digital"))
++		rt_sysc_m32(0xf << 17, 0xf << 17, SYSC_REG_AGPIO_CFG);
++
++	return ret;
+ }
+ 
+ static const struct of_device_id mt76x8_pinctrl_match[] = {