[PATCH v2 11/22] pinctrl: starfive: Add StarFive JHB100 sys2 controller driver
Changhuang Liang
changhuang.liang at starfivetech.com
Thu May 14 04:12:07 PDT 2026
Add pinctrl driver for StarFive JHB100 SoC System-2(sys2) pinctrl
controller.
Co-developed-by: Lianfeng Ouyang <lianfeng.ouyang at starfivetech.com>
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 | 134 ++++++++++++++++++
3 files changed, 147 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 882d621eaf57..da11d486779a 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -90,3 +90,15 @@ 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..2601eb7b5b59
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jhb100-sys2.c
@@ -0,0 +1,134 @@
+// 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 <dt-bindings/pinctrl/starfive,jhb100-pinctrl.h>
+#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 = "gpiow0",
+ .pin_grp = {
+ PADNUM_SYS2_GPIO_A36,
+ PADNUM_SYS2_GPIO_A37,
+ PADNUM_SYS2_GPIO_A38,
+ PADNUM_SYS2_GPIO_A39
+ },
+ .num_pins = 4,
+ .range = BIT(JHB100_PINVREF_1_8V) | BIT(JHB100_PINVREF_3_3V)
+ },
+ {
+ .name = "gpiow-inner",
+ .pin_grp = {
+ PADNUM_SYS2_GPIO_A40,
+ PADNUM_SYS2_GPIO_A41,
+ PADNUM_SYS2_GPIO_A42,
+ PADNUM_SYS2_GPIO_A43
+ },
+ .num_pins = 4,
+ .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 },
+ .func_sel = { .reg = 0x0d4, .width_per_pin = 2 },
+ .config = 0x010,
+ .output = 0x0bc,
+ .output_en = 0x0c4,
+ .gpio_status = 0x0cc,
+ .irq_en = 0x0e0,
+ .irq_status = 0x0e8,
+ .irq_clr = 0x0f0,
+ .irq_trigger = 0x0f8,
+ .irq_level = 0x100,
+ .irq_both_edge = 0x108,
+ .irq_edge = 0x110,
+};
+
+static const struct jhb100_pinctrl_func_maps jhb100_func_maps_sys2[] = {
+ { .func = "gpio", .val = 0 },
+ { .func = "host0_port80", .val = 2 },
+ { .func = "host1_port80", .val = 3 },
+ { .func = "jtag", .val = 2 },
+ { .func = "smbalert", .val = 2 },
+ { .func = "uart", .val = 1 },
+};
+
+static const struct jhb100_pinctrl_domain_info jhb100_sys2_pinctrl_info = {
+ .name = "jhb100-sys2",
+ .pl_desc = jhb100_sys2_pl_desc,
+ .crl_desc = jhb100_sys2_pinctrl_rl_desc,
+ .regs = &jhb100_sys2_pinctrl_regs,
+ .fmaps = jhb100_func_maps_sys2,
+ .num_maps = ARRAY_SIZE(jhb100_func_maps_sys2),
+};
+
+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
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