[PATCH v1 2/8] pinctrl: starfive: Add StarFive JHB100 adc0 controller driver

[Changhuang Liang <changhuang.liang@starfivetech.com>]

Add pinctrl driver for StarFive JHB100 SoC ADC-0(adc0) pinctrl
controller.

Co-developed-by: Lianfeng Ouyang <lianfeng.ouyang@starfivetech.com>
Signed-off-by: Lianfeng Ouyang <lianfeng.ouyang@starfivetech.com>
Signed-off-by: Alex Soo <yuklin.soo@starfivetech.com>
Signed-off-by: Changhuang Liang <changhuang.liang@starfivetech.com>
---
 drivers/pinctrl/starfive/Kconfig              | 11 +++
 drivers/pinctrl/starfive/Makefile             |  1 +
 .../starfive/pinctrl-starfive-jhb100-adc0.c   | 85 +++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jhb100-adc0.c

diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index 7ff506a15dd8..1622cc73d9ae 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -54,6 +54,17 @@ config PINCTRL_STARFIVE_JHB100
 	select GPIOLIB
 	select GPIOLIB_IRQCHIP
 
+config PINCTRL_STARFIVE_JHB100_ADC0
+	tristate "StarFive JHB100 SoC ADC-0 pinctrl and GPIO driver"
+	depends on ARCH_STARFIVE || COMPILE_TEST
+	select PINCTRL_STARFIVE_JHB100
+	default m if ARCH_STARFIVE
+	help
+	  Say yes here to support ADC-0 pin control on the StarFive JHB100 SoC.
+	  This also provides an interface to the GPIO pins not used by other
+	  peripherals supporting inputs, outputs, configuring pull-up/pull-down
+	  and interrupts on input changes.
+
 config PINCTRL_STARFIVE_JHB100_PER0
 	tristate "StarFive JHB100 SoC Peripheral-0 pinctrl and GPIO driver"
 	depends on ARCH_STARFIVE || COMPILE_TEST
diff --git a/drivers/pinctrl/starfive/Makefile b/drivers/pinctrl/starfive/Makefile
index 351fce524fec..1113e73657d7 100644
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -7,6 +7,7 @@ obj-$(CONFIG_PINCTRL_STARFIVE_JH7110_SYS)	+= pinctrl-starfive-jh7110-sys.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JH7110_AON)	+= pinctrl-starfive-jh7110-aon.o
 
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100)		+= pinctrl-starfive-jhb100.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_ADC0)	+= pinctrl-starfive-jhb100-adc0.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER0)	+= pinctrl-starfive-jhb100-per0.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER1)	+= pinctrl-starfive-jhb100-per1.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER2)	+= pinctrl-starfive-jhb100-per2.o
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-adc0.c b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-adc0.c
new file mode 100644
index 000000000000..8aaa4fca52e6
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-adc0.c
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JHB100 SoC ADC-0 domain
+ *
+ * Copyright (C) 2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo@starfivetech.com>
+ *
+ */
+
+#include <linux/platform_device.h>
+
+#include "pinctrl-starfive-jhb100.h"
+
+static const struct jhb100_pin_layout_desc jhb100_adc0_pl_desc[] = {
+	{ .pin_start = 0, .pin_cnt = 8, .name = "gpio", .gpio_func_sel = 0 },
+	{ 0xff },
+};
+
+static const struct config_reg_layout_desc jhb100_adc0_pinctrl_crl_desc[] = {
+	{
+		.pin_start					= 0,
+		.pin_cnt					= 8,
+		.fields[PAD_CFG_DRIVE_STRENGTH_3BIT]		= { .shift = 0, .width = 3 },
+		.fields[PAD_CFG_INPUT_ENABLE]			= { .shift = 3, .width = 1 },
+		.fields[PAD_CFG_PULL_DOWN]			= { .shift = 4, .width = 1 },
+		.fields[PAD_CFG_PULL_UP]			= { .shift = 5, .width = 1 },
+		.fields[PAD_CFG_SLEW_RATE]			= { .shift = 6, .width = 1 },
+		.fields[PAD_CFG_SCHMITT_TRIGGER_SELECT]		= { .shift = 7, .width = 1 },
+		.fields[PAD_CFG_DEBOUNCE_WIDTH]			= { .shift = 15, .width = 17 },
+	},
+	{ 0xff },
+};
+
+static const struct starfive_pinctrl_regs jhb100_adc0_pinctrl_regs = {
+	.func_sel		= { .reg = 0x2c, .width_per_pin = 2 },
+	.config			= 0x00,
+	.output			= 0x20,
+	.output_en		= 0x24,
+	.gpio_status		= 0x28,
+	.irq_en			= 0x30,
+	.irq_status		= 0x34,
+	.irq_clr		= 0x38,
+	.irq_trigger		= 0x3c,
+	.irq_level		= 0x40,
+	.irq_both_edge		= 0x44,
+	.irq_edge		= 0x48,
+};
+
+static const struct jhb100_pinctrl_func_maps jhb100_func_maps_adc0[] = {
+	{ .func = "adc",		.val = 1 },
+	{ .func = "gpio",		.val = 0 },
+	{ .func = "host0_port80",	.val = 3 },
+	{ .func = "smbalert",		.val = 2 },
+};
+
+static const struct jhb100_pinctrl_domain_info jhb100_adc0_pinctrl_info = {
+	.name			= "jhb100-adc0",
+	.pl_desc		= jhb100_adc0_pl_desc,
+	.crl_desc		= jhb100_adc0_pinctrl_crl_desc,
+	.regs			= &jhb100_adc0_pinctrl_regs,
+	.fmaps			= jhb100_func_maps_adc0,
+	.num_maps		= ARRAY_SIZE(jhb100_func_maps_adc0),
+};
+
+static const struct of_device_id jhb100_adc0_pinctrl_of_match[] = {
+	{
+		.compatible = "starfive,jhb100-adc0-pinctrl",
+		.data = &jhb100_adc0_pinctrl_info,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jhb100_adc0_pinctrl_of_match);
+
+static struct platform_driver jhb100_adc0_pinctrl_driver = {
+	.probe = jhb100_pinctrl_probe,
+	.driver = {
+		.name = "starfive-jhb100-adc0-pinctrl",
+		.of_match_table = jhb100_adc0_pinctrl_of_match,
+	},
+};
+module_platform_driver(jhb100_adc0_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JHB100 SoC ADC-0 domain");
+MODULE_AUTHOR("Alex Soo <yuklin.soo@starfivetech.com>");
+MODULE_LICENSE("GPL");
-- 
2.25.1