[PATCH v1 08/20] pinctrl: starfive: Add StarFive JHB100 sys2 controller driver

[Changhuang Liang]

Add pinctrl driver for StarFive JHB100 SoC System-2(sys2) pinctrl
controller.

Signed-off-by: Lianfeng Ouyang <lianfeng.ouyang at starfivetech.com>
Signed-off-by: Changhuang Liang <changhuang.liang at starfivetech.com>
---
 drivers/pinctrl/starfive/Kconfig              |  12 ++
 drivers/pinctrl/starfive/Makefile             |   1 +
 .../starfive/pinctrl-starfive-jhb100-sys2.c   | 109 ++++++++++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys2.c

diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index fb1d4991800b..7d68cf6ebd90 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -94,3 +94,15 @@ config PINCTRL_STARFIVE_JHB100_SYS1
 	  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_SYS2
+	tristate "StarFive JHB100 SoC System-2 pinctrl and GPIO driver"
+	depends on ARCH_STARFIVE || COMPILE_TEST
+	depends on OF
+	select PINCTRL_STARFIVE_JHB100
+	default ARCH_STARFIVE
+	help
+	  Say yes here to support System-2 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.
diff --git a/drivers/pinctrl/starfive/Makefile b/drivers/pinctrl/starfive/Makefile
index 8d96cf80d377..b817ad93b91d 100644
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_PINCTRL_STARFIVE_JHB100)		+= pinctrl-starfive-jhb100.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_SYS0)	+= pinctrl-starfive-jhb100-sys0.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_SYS0H)	+= pinctrl-starfive-jhb100-sys0h.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_SYS1)	+= pinctrl-starfive-jhb100-sys1.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_SYS2)	+= pinctrl-starfive-jhb100-sys2.o
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys2.c b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys2.c
new file mode 100644
index 000000000000..7b2c7c30e29f
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys2.c
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JHB100 SoC System-2 domain
+ *
+ * Copyright (C) 2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo at starfivetech.com>
+ *
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+
+#include "pinctrl-starfive-jhb100.h"
+
+static const struct jhb100_pin_layout_desc jhb100_sys2_pl_desc[] = {
+	{ .pin_start = 0, .pin_cnt = 37, .name = "gpio", .gpio_func_sel = 0 },
+	{ .pin_start = 37, .pin_cnt = 1, .name = "jtag_tck", .gpio_func_sel = -1 },
+	{ .pin_start = 38, .pin_cnt = 1, .name = "jtag_tresetn", .gpio_func_sel = -1 },
+	{ .pin_start = 39, .pin_cnt = 1, .name = "jtag_tmc", .gpio_func_sel = -1 },
+	{ .pin_start = 40, .pin_cnt = 1, .name = "jtag_tdi", .gpio_func_sel = -1 },
+	{ .pin_start = 41, .pin_cnt = 1, .name = "jtag_tdo", .gpio_func_sel = -1 },
+	{ .pin_start = 42, .pin_cnt = 1, .name = "jtag_hpd", .gpio_func_sel = -1 },
+	{ 0xff },
+};
+
+static struct config_reg_layout_desc jhb100_sys2_pinctrl_rl_desc[] = {
+	{
+		.pin_start			= 0,
+		.pin_cnt			= 37,
+		.drive_strength_2bit		= { .shift = 0, .width = 2 },
+		.input_enable			= { .shift = 2, .width = 1 },
+		.pull_down			= { .shift = 3, .width = 1 },
+		.pull_up			= { .shift = 4, .width = 1 },
+		.slew_rate			= { .shift = 5, .width = 1 },
+		.schmitt_trigger_select		= { .shift = 6, .width = 1 },
+		.reserved			= { .shift = 7, .width = 8 },
+		.debounce_width			= { .shift = 15, .width = 17 },
+	},
+	{
+		.pin_start			= 37,
+		.pin_cnt			= 5,
+		.drive_strength_2bit		= { .shift = 0, .width = 2 },
+		.input_enable			= { .shift = 2, .width = 1 },
+		.pull_down			= { .shift = 3, .width = 1 },
+		.pull_up			= { .shift = 4, .width = 1 },
+		.slew_rate			= { .shift = 5, .width = 1 },
+		.schmitt_trigger_select		= { .shift = 6, .width = 1 },
+		.reserved			= { .shift = 7, .width = 25 },
+	},
+	{ 0xff },
+};
+
+static const struct pinvref_desc pinvref_desc_sys2[] = {
+	{
+		.name = "gpiow",
+		.range = BIT(JHB100_PINVREF_1_8V) | BIT(JHB100_PINVREF_3_3V)
+	},
+	{
+		.name = "gpiow-inner",
+		.range = BIT(JHB100_PINVREF_1_8V) | BIT(JHB100_PINVREF_3_3V)
+	},
+	{ NULL },
+};
+
+struct starfive_pinctrl_regs jhb100_sys2_pinctrl_regs = {
+	.vref			= { .reg = 0x000, .pv_desc = pinvref_desc_sys2 },
+	.config			= { .reg = 0x010, .width_per_pin = 1 },
+	.output			= { .reg = 0x0bc, .width_per_pin = 1 },
+	.output_en		= { .reg = 0x0c4, .width_per_pin = 1 },
+	.gpio_status		= { .reg = 0x0cc, .width_per_pin = 1 },
+	.func_sel		= { .reg = 0x0d4, .width_per_pin = 2 },
+	.irq_en			= { .reg = 0x0e0, .width_per_pin = 1 },
+	.irq_status		= { .reg = 0x0e8, .width_per_pin = 1 },
+	.irq_clr		= { .reg = 0x0f0, .width_per_pin = 1 },
+	.irq_trigger		= { .reg = 0x0f8, .width_per_pin = 1 },
+	.irq_level		= { .reg = 0x100, .width_per_pin = 1 },
+	.irq_both_edge		= { .reg = 0x108, .width_per_pin = 1 },
+	.irq_edge		= { .reg = 0x110, .width_per_pin = 1 },
+};
+
+static const struct jhb100_pinctrl_domain_info jhb100_sys2_pinctrl_info = {
+	.name			= "jhb100-sys2",
+	.gc_base		= -1,
+	.pl_desc		= jhb100_sys2_pl_desc,
+	.crl_desc		= jhb100_sys2_pinctrl_rl_desc,
+	.regs			= &jhb100_sys2_pinctrl_regs,
+};
+
+static const struct of_device_id jhb100_sys2_pinctrl_of_match[] = {
+	{
+		.compatible = "starfive,jhb100-sys2-pinctrl",
+		.data = &jhb100_sys2_pinctrl_info,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jhb100_sys2_pinctrl_of_match);
+
+static struct platform_driver jhb100_sys2_pinctrl_driver = {
+	.probe = jhb100_pinctrl_probe,
+	.driver = {
+		.name = "starfive-jhb100-sys2-pinctrl",
+		.of_match_table = jhb100_sys2_pinctrl_of_match,
+	},
+};
+module_platform_driver(jhb100_sys2_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JHB100 SoC System-2 domain");
+MODULE_AUTHOR("Alex Soo <yuklin.soo at starfivetech.com>");
+MODULE_LICENSE("GPL");
-- 
2.25.1