[PATCH v1 04/20] pinctrl: starfive: Add StarFive JHB100 sys0h controller driver

[Changhuang Liang]

Add pinctrl driver for StarFive JHB100 SoC System-0 Host(sys0h) 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-sys0h.c  | 81 +++++++++++++++++++
 3 files changed, 94 insertions(+)
 create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys0h.c

diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index dc53070ee2c8..8739ed1ca350 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -70,3 +70,15 @@ config PINCTRL_STARFIVE_JHB100_SYS0
 	  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_SYS0H
+        tristate "StarFive JHB100 SoC System-0 Host 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-0 Host 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 c0d368f413bc..b26156a6d0eb 100644
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -8,3 +8,4 @@ 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_SYS0)	+= pinctrl-starfive-jhb100-sys0.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_SYS0H)	+= pinctrl-starfive-jhb100-sys0h.o
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys0h.c b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys0h.c
new file mode 100644
index 000000000000..42fbbcd92550
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys0h.c
@@ -0,0 +1,81 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JHB100 SoC System-0 host 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_sys0h_pl_desc[] = {
+	{ .pin_start = 0, .pin_cnt = 7, .name = "gpio", .gpio_func_sel = 0 },
+	{ .pin_start = 7, .pin_cnt = 1, .name = "espi0_reset", .gpio_func_sel = 1 },
+	{ .pin_start = 8, .pin_cnt = 4, .name = "gpio", .gpio_func_sel = 0 },
+	{ 0xff },
+};
+
+static struct config_reg_layout_desc jhb100_sys0h_pinctrl_rl_desc[] = {
+	{
+		.pin_start			= 0,
+		.pin_cnt			= 12,
+		.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 },
+	},
+	{ 0xff },
+};
+
+struct starfive_pinctrl_regs jhb100_sys0h_pinctrl_regs = {
+	.config			= { .reg = 0x04, .width_per_pin = 1 },
+	.output			= { .reg = 0x34, .width_per_pin = 1 },
+	.output_en		= { .reg = 0x38, .width_per_pin = 1 },
+	.gpio_status		= { .reg = 0x3c, .width_per_pin = 1 },
+	.func_sel		= { .reg = 0x40, .width_per_pin = 2 },
+	.irq_en			= { .reg = 0x44, .width_per_pin = 1 },
+	.irq_status		= { .reg = 0x48, .width_per_pin = 1 },
+	.irq_clr		= { .reg = 0x4c, .width_per_pin = 1 },
+	.irq_trigger		= { .reg = 0x50, .width_per_pin = 1 },
+	.irq_level		= { .reg = 0x54, .width_per_pin = 1 },
+	.irq_both_edge		= { .reg = 0x58, .width_per_pin = 1 },
+	.irq_edge		= { .reg = 0x5c, .width_per_pin = 1 },
+};
+
+static struct jhb100_pinctrl_domain_info jhb100_sys0h_pinctrl_info = {
+	.name			= "jhb100-sys0h",
+	.gc_base		= -1,
+	.pl_desc		= jhb100_sys0h_pl_desc,
+	.crl_desc		= jhb100_sys0h_pinctrl_rl_desc,
+	.regs			= &jhb100_sys0h_pinctrl_regs,
+};
+
+static const struct of_device_id jhb100_sys0h_pinctrl_of_match[] = {
+	{
+		.compatible = "starfive,jhb100-sys0h-pinctrl",
+		.data = &jhb100_sys0h_pinctrl_info,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jhb100_sys0h_pinctrl_of_match);
+
+static struct platform_driver jhb100_sys0h_pinctrl_driver = {
+	.probe = jhb100_pinctrl_probe,
+	.driver = {
+		.name = "starfive-jhb100-sys0h-pinctrl",
+		.of_match_table = jhb100_sys0h_pinctrl_of_match,
+	},
+};
+module_platform_driver(jhb100_sys0h_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JHB100 SoC System-0 host domain");
+MODULE_AUTHOR("Alex Soo <yuklin.soo at starfivetech.com>");
+MODULE_LICENSE("GPL");
-- 
2.25.1