pinctrl: starfive: Add StarFive JHB100 per3 controller driver

Add pinctrl driver for StarFive JHB100 SoC Peripheral-3(per3) 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>
Signed-off-by: Linus Walleij <linusw@kernel.org>

3 files changed, 141 insertions, 0 deletions

diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index 426be481a3fb..11bd429b45b7 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -100,6 +100,17 @@ config PINCTRL_STARFIVE_JHB100_PER2POK
 	  peripherals supporting inputs, outputs, configuring pull-up/pull-down
 	  and interrupts on input changes.
 
+config PINCTRL_STARFIVE_JHB100_PER3
+	tristate "StarFive JHB100 SoC Peripheral-3 pinctrl and GPIO driver"
+	depends on ARCH_STARFIVE || COMPILE_TEST
+	select PINCTRL_STARFIVE_JHB100
+	default ARCH_STARFIVE
+	help
+	  Say yes here to support Peripheral-3 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_SYS0
 	tristate "StarFive JHB100 SoC System-0 pinctrl and GPIO driver"
 	depends on ARCH_STARFIVE || COMPILE_TEST
diff --git a/drivers/pinctrl/starfive/Makefile b/drivers/pinctrl/starfive/Makefile
index 213002da9cdd..351fce524fec 100644
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER0)	+= pinctrl-starfive-jhb100-per0.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER1)	+= pinctrl-starfive-jhb100-per1.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER2)	+= pinctrl-starfive-jhb100-per2.o
 obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER2POK)	+= pinctrl-starfive-jhb100-per2pok.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JHB100_PER3)	+= pinctrl-starfive-jhb100-per3.o
 obj-$(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
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-per3.c b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-per3.c
new file mode 100644
index 000000000000..24158d90f75d
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-per3.c
@@ -0,0 +1,129 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JHB100 SoC Peripheral-3 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"
+
+/* per3 pad numbers */
+#define PADNUM_PER3_GPIO_E0				0
+#define PADNUM_PER3_GPIO_E1				1
+#define PADNUM_PER3_GPIO_E2				2
+#define PADNUM_PER3_GPIO_E3				3
+#define PADNUM_PER3_GPIO_E4				4
+#define PADNUM_PER3_GPIO_E5				5
+#define PADNUM_PER3_GPIO_E6				6
+#define PADNUM_PER3_GPIO_E7				7
+#define PADNUM_PER3_GPIO_E8				8
+#define PADNUM_PER3_GPIO_E9				9
+#define PADNUM_PER3_GPIO_E10				10
+
+static const struct jhb100_pin_layout_desc jhb100_per3_pl_desc[] = {
+	{ .pin_start = 0, .pin_cnt = 11, .name = "gpio", .gpio_func_sel = 0 },
+	{ 0xff },
+};
+
+static const struct config_reg_layout_desc jhb100_per3_pinctrl_rl_desc[] = {
+	{
+		.pin_start					= 0,
+		.pin_cnt					= 2,
+		.fields[PAD_CFG_DRIVE_STRENGTH_2BIT]		= { .shift = 0, .width = 2 },
+		.fields[PAD_CFG_INPUT_ENABLE]			= { .shift = 2, .width = 1 },
+		.fields[PAD_CFG_PULL_DOWN]			= { .shift = 3, .width = 1 },
+		.fields[PAD_CFG_PULL_UP]			= { .shift = 4, .width = 1 },
+		.fields[PAD_CFG_SLEW_RATE]			= { .shift = 5, .width = 1 },
+		.fields[PAD_CFG_SCHMITT_TRIGGER_SELECT]		= { .shift = 6, .width = 1 },
+		.fields[PAD_CFG_DEBOUNCE_WIDTH]			= { .shift = 15, .width = 17 },
+	},
+	{
+		.pin_start					= 2,
+		.pin_cnt					= 9,
+		.fields[PAD_CFG_INPUT_ENABLE]			= { .shift = 0, .width = 1 },
+		.fields[PAD_CFG_SLEW_RATE]			= { .shift = 1, .width = 1 },
+		.fields[PAD_CFG_VSEL]				= { .shift = 2, .width = 2 },
+		.fields[PAD_CFG_DEBOUNCE_WIDTH]			= { .shift = 15, .width = 17 },
+	},
+	{ 0xff },
+};
+
+static const struct pinvref_desc pinvref_desc_per3[] = {
+	{
+		/* gpios */
+		.pin_grp = {
+			PADNUM_PER3_GPIO_E0,
+			PADNUM_PER3_GPIO_E1,
+			PADNUM_PER3_GPIO_E2,
+			PADNUM_PER3_GPIO_E3,
+			PADNUM_PER3_GPIO_E4,
+			PADNUM_PER3_GPIO_E5,
+			PADNUM_PER3_GPIO_E6,
+			PADNUM_PER3_GPIO_E7,
+			PADNUM_PER3_GPIO_E8,
+			PADNUM_PER3_GPIO_E9,
+			PADNUM_PER3_GPIO_E10
+		},
+		.num_pins = 11,
+		.range = BIT(JHB100_PINVREF_1_8V) | BIT(JHB100_PINVREF_2_5V) |
+			 BIT(JHB100_PINVREF_3_3V)
+	},
+};
+
+static const struct starfive_pinctrl_regs jhb100_per3_pinctrl_regs = {
+	.vref			= { .reg = 0x00, .pv_desc = pinvref_desc_per3,
+				    .num_pv = ARRAY_SIZE(pinvref_desc_per3) },
+	.func_sel		= { .reg = 0x3c, .width_per_pin = 2 },
+	.config			= 0x04,
+	.output			= 0x30,
+	.output_en		= 0x34,
+	.gpio_status		= 0x38,
+	.irq_en			= 0x40,
+	.irq_status		= 0x44,
+	.irq_clr		= 0x48,
+	.irq_trigger		= 0x4c,
+	.irq_level		= 0x50,
+	.irq_both_edge		= 0x54,
+	.irq_edge		= 0x58,
+};
+
+static const struct jhb100_pinctrl_func_maps jhb100_func_maps_per3[] = {
+	{ .func = "gmac_mdio",		.val = 1 },
+	{ .func = "gmac_rmii",		.val = 1 },
+	{ .func = "gpio",		.val = 0 },
+};
+
+static const struct jhb100_pinctrl_domain_info jhb100_per3_pinctrl_info = {
+	.name			= "jhb100-per3",
+	.pl_desc		= jhb100_per3_pl_desc,
+	.crl_desc		= jhb100_per3_pinctrl_rl_desc,
+	.regs			= &jhb100_per3_pinctrl_regs,
+	.fmaps			= jhb100_func_maps_per3,
+	.num_maps		= ARRAY_SIZE(jhb100_func_maps_per3),
+};
+
+static const struct of_device_id jhb100_per3_pinctrl_of_match[] = {
+	{
+		.compatible = "starfive,jhb100-per3-pinctrl",
+		.data = &jhb100_per3_pinctrl_info,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jhb100_per3_pinctrl_of_match);
+
+static struct platform_driver jhb100_per3_pinctrl_driver = {
+	.probe = jhb100_pinctrl_probe,
+	.driver = {
+		.name = "starfive-jhb100-per3-pinctrl",
+		.of_match_table = jhb100_per3_pinctrl_of_match,
+	},
+};
+module_platform_driver(jhb100_per3_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JHB100 SoC Peripheral-3 domain");
+MODULE_AUTHOR("Alex Soo <yuklin.soo@starfivetech.com>");
+MODULE_LICENSE("GPL");