drivers: pinctrl: Add Qualcomm SM6350 TLMM driver

Add support for TLMM pin controller block (Top Level Mode Multiplexer)
on SM6350 SoC, with support for special pins.

Correct pin configuration is required for working debug UART and eMMC/SD
cards.

Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>

drivers/pinctrl/qcom/Kconfig

@@ -96,6 +96,13 @@ config PINCTRL_QCOM_SM6115
 	  Say Y here to enable support for pinctrl on the Snapdragon SM6115 SoC,
 	  as well as the associated GPIO driver.
 
+config PINCTRL_QCOM_SM6350
+	bool "Qualcomm SM6350 Pinctrl"
+	select PINCTRL_QCOM
+	help
+	  Say Y here to enable support for pinctrl on the Snapdragon SM6350 SoC,
+	  as well as the associated GPIO driver.
+
 config PINCTRL_QCOM_SM8150
 	bool "Qualcomm SM8150 Pinctrl"
 	select PINCTRL_QCOM

drivers/pinctrl/qcom/Makefile

@@ -16,6 +16,7 @@ obj-$(CONFIG_PINCTRL_QCOM_SDM660) += pinctrl-sdm660.o
 obj-$(CONFIG_PINCTRL_QCOM_SDM670) += pinctrl-sdm670.o
 obj-$(CONFIG_PINCTRL_QCOM_SDM845) += pinctrl-sdm845.o
 obj-$(CONFIG_PINCTRL_QCOM_SM6115) += pinctrl-sm6115.o
+obj-$(CONFIG_PINCTRL_QCOM_SM6350) += pinctrl-sm6350.o
 obj-$(CONFIG_PINCTRL_QCOM_SM8150) += pinctrl-sm8150.o
 obj-$(CONFIG_PINCTRL_QCOM_SM8250) += pinctrl-sm8250.o
 obj-$(CONFIG_PINCTRL_QCOM_SM8550) += pinctrl-sm8550.o

drivers/pinctrl/qcom/pinctrl-sm6350.c

@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Qualcomm sm6350 pinctrl
+ *
+ * (C) Copyright 2024 Linaro Ltd.
+ * (C) Copyright 2025 Luca Weiss <luca.weiss@fairphone.com>
+ *
+ */
+
+#include <dm.h>
+
+#include "pinctrl-qcom.h"
+
+#define MAX_PIN_NAME_LEN 32
+static char pin_name[MAX_PIN_NAME_LEN] __section(".data");
+
+static const struct pinctrl_function msm_pinctrl_functions[] = {
+	{"qup13_f2", 1},
+	{"gpio", 0},
+};
+
+#define SDC_PINGROUP(pg_name, ctl, pull, drv)		\
+	{						\
+		.name = pg_name,			\
+		.ctl_reg = ctl,				\
+		.io_reg = 0,				\
+		.pull_bit = pull,			\
+		.drv_bit = drv,				\
+		.oe_bit = -1,				\
+		.in_bit = -1,				\
+		.out_bit = -1,				\
+	}
+
+#define UFS_RESET(pg_name, offset)			\
+	{						\
+		.name = pg_name,			\
+		.ctl_reg = offset,			\
+		.io_reg = offset + 0x4,			\
+		.pull_bit = 3,				\
+		.drv_bit = 0,				\
+		.oe_bit = -1,				\
+		.in_bit = -1,				\
+		.out_bit = 0,				\
+	}
+
+static const struct msm_special_pin_data sm6350_special_pins_data[] = {
+	[0] = UFS_RESET("ufs_reset", 0xae000),
+	[1] = SDC_PINGROUP("sdc1_rclk", 0xa1000, 15, 0),
+	[2] = SDC_PINGROUP("sdc1_clk", 0xa0000, 13, 6),
+	[3] = SDC_PINGROUP("sdc1_cmd", 0xa0000, 11, 3),
+	[4] = SDC_PINGROUP("sdc1_data", 0xa0000, 9, 0),
+	[5] = SDC_PINGROUP("sdc2_clk", 0xa2000, 14, 6),
+	[6] = SDC_PINGROUP("sdc2_cmd", 0xa2000, 11, 3),
+	[7] = SDC_PINGROUP("sdc2_data", 0xa2000, 9, 0),
+};
+
+static const char *sm6350_get_function_name(struct udevice *dev,
+					    unsigned int selector)
+{
+	return msm_pinctrl_functions[selector].name;
+}
+
+static const char *sm6350_get_pin_name(struct udevice *dev,
+				       unsigned int selector)
+{
+	if (selector >= 156 && selector <= 163)
+		snprintf(pin_name, MAX_PIN_NAME_LEN,
+			 sm6350_special_pins_data[selector - 156].name);
+	else
+		snprintf(pin_name, MAX_PIN_NAME_LEN, "gpio%u", selector);
+
+	return pin_name;
+}
+
+static int sm6350_get_function_mux(__maybe_unused unsigned int pin,
+				   unsigned int selector)
+{
+	return msm_pinctrl_functions[selector].val;
+}
+
+static struct msm_pinctrl_data sm6350_data = {
+	.pin_data = {
+		.pin_count = 164,
+		.special_pins_start = 156,
+		.special_pins_data = sm6350_special_pins_data,
+	},
+	.functions_count = ARRAY_SIZE(msm_pinctrl_functions),
+	.get_function_name = sm6350_get_function_name,
+	.get_function_mux = sm6350_get_function_mux,
+	.get_pin_name = sm6350_get_pin_name,
+};
+
+static const struct udevice_id msm_pinctrl_ids[] = {
+	{ .compatible = "qcom,sm6350-tlmm", .data = (ulong)&sm6350_data },
+	{ /* Sentinel */ }
+};
+
+U_BOOT_DRIVER(pinctrl_sm6350) = {
+	.name		= "pinctrl_sm6350",
+	.id		= UCLASS_NOP,
+	.of_match	= msm_pinctrl_ids,
+	.ops		= &msm_pinctrl_ops,
+	.bind		= msm_pinctrl_bind,
+};