[RFC PATCH v3 3/7] pinctrl: starfive: jh8100: add sys_west domain sub-driver

Alex Soo
2024-05-03T12:49:27Z

Add sys_west domain sub-driver.

Signed-off-by: Alex Soo <yuklin.soo@starfivetech.com>
---
drivers/pinctrl/starfive/Kconfig | 12 ++
drivers/pinctrl/starfive/Makefile | 1 +
.../pinctrl-starfive-jh8100-sys-west.c | 164 ++++++++++++++++++
.../starfive/pinctrl-starfive-jh8100.c | 6 +
.../starfive/pinctrl-starfive-jh8100.h | 5 +
5 files changed, 188 insertions(+)
create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-west.c

diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index afcbf9d4dc8d..d78f161a636c 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -70,3 +70,15 @@ config PINCTRL_STARFIVE_JH8100_SYS_EAST
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_JH8100_SYS_WEST
+ tristate "StarFive JH8100 SoC System IOMUX-West pinctrl and GPIO driver"
+ depends on ARCH_STARFIVE || COMPILE_TEST
+ depends on OF
+ select PINCTRL_STARFIVE_JH8100
+ default ARCH_STARFIVE
+ help
+ Say yes here to support system iomux-west pin control on the StarFive JH8100 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 45698c502b48..784465157ae2 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-$(CONFIG_PINCTRL_STARFIVE_JH8100) += pinctrl-starfive-jh8100.o
obj-$(CONFIG_PINCTRL_STARFIVE_JH8100_SYS_EAST) += pinctrl-starfive-jh8100-sys-east.o
+obj-$(CONFIG_PINCTRL_STARFIVE_JH8100_SYS_WEST) += pinctrl-starfive-jh8100-sys-west.o
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-west.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-west.c
new file mode 100644
index 000000000000..b97d89777aa3
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-west.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JH8100 SoC sys west controller
+ *
+ * Copyright (C) 2023-2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo@starfivetech.com>
+ *
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/module.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+#include <dt-bindings/pinctrl/starfive,jh8100-pinctrl.h>
+
+#include "pinctrl-starfive-jh8100.h"
+
+#define JH8100_SYS_W_GC_BASE 0
+
+/* registers */
+#define JH8100_SYS_W_DOEN 0x000
+#define JH8100_SYS_W_DOUT 0x010
+#define JH8100_SYS_W_GPI 0x020
+#define JH8100_SYS_W_GPIOIN 0x068
+
+#define JH8100_SYS_W_GPIOEN 0x048
+#define JH8100_SYS_W_GPIOIS0 0x04c
+#define JH8100_SYS_W_GPIOIC0 0x050
+#define JH8100_SYS_W_GPIOIBE0 0x054
+#define JH8100_SYS_W_GPIOIEV0 0x058
+#define JH8100_SYS_W_GPIOIE0 0x05c
+#define JH8100_SYS_W_GPIORIS0 0x060
+#define JH8100_SYS_W_GPIOMIS0 0x064
+
+static const struct pinctrl_pin_desc jh8100_sys_w_pins[] = {
+ PINCTRL_PIN(0, "SYS_W_GPIO0"),
+ PINCTRL_PIN(1, "SYS_W_GPIO1"),
+ PINCTRL_PIN(2, "SYS_W_GPIO2"),
+ PINCTRL_PIN(3, "SYS_W_GPIO3"),
+ PINCTRL_PIN(4, "SYS_W_GPIO4"),
+ PINCTRL_PIN(5, "SYS_W_GPIO5"),
+ PINCTRL_PIN(6, "SYS_W_GPIO6"),
+ PINCTRL_PIN(7, "SYS_W_GPIO7"),
+ PINCTRL_PIN(8, "SYS_W_GPIO8"),
+ PINCTRL_PIN(9, "SYS_W_GPIO9"),
+ PINCTRL_PIN(10, "SYS_W_GPIO10"),
+ PINCTRL_PIN(11, "SYS_W_GPIO11"),
+ PINCTRL_PIN(12, "SYS_W_GPIO12"),
+ PINCTRL_PIN(13, "SYS_W_GPIO13"),
+ PINCTRL_PIN(14, "SYS_W_GPIO14"),
+ PINCTRL_PIN(15, "SYS_W_GPIO15"),
+};
+
+static const struct jh8100_gpio_func_sel
+ jh8100_sys_w_func_sel[ARRAY_SIZE(jh8100_sys_w_pins)] = {
+ [0] = { 0xb4, 0, 2 },
+ [1] = { 0xb4, 12, 2 },
+ [2] = { 0xb4, 14, 2 },
+ [3] = { 0xb4, 16, 2 },
+ [4] = { 0xb4, 18, 2 },
+ [5] = { 0xb4, 20, 2 },
+ [6] = { 0xb4, 22, 2 },
+ [7] = { 0xb4, 24, 2 },
+ [8] = { 0xb4, 26, 2 },
+ [9] = { 0xb4, 28, 2 },
+ [10] = { 0xb4, 2, 2 },
+ [11] = { 0xb4, 4, 2 },
+ [12] = { 0xb4, 6, 2 },
+ [13] = { 0xb4, 8, 2 },
+ [14] = { 0xb4, 10, 2 },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int jh8100_sys_w_pinctrl_suspend(struct device *dev)
+{
+ struct jh8100_pinctrl *sfp;
+ int i;
+
+ sfp = dev_get_drvdata(dev);
+ if (!sfp)
+ return -EINVAL;
+
+ for (i = 0; i < sfp->info->nregs; i++)
+ sfp->jh8100_sys_west_regs[i] = readl_relaxed(sfp->base + (i * 4));
+
+ return pinctrl_force_sleep(sfp->pctl);
+}
+
+static int jh8100_sys_w_pinctrl_resume(struct device *dev)
+{
+ struct jh8100_pinctrl *sfp;
+ int i;
+
+ sfp = dev_get_drvdata(dev);
+ if (!sfp)
+ return -EINVAL;
+
+ for (i = 0; i < sfp->info->nregs; i++)
+ writel_relaxed(sfp->jh8100_sys_west_regs[i], sfp->base + (i * 4));
+
+ return pinctrl_force_default(sfp->pctl);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(jh8100_sys_w_pinctrl_dev_pm_ops,
+ jh8100_sys_w_pinctrl_suspend,
+ jh8100_sys_w_pinctrl_resume);
+
+static const struct jh8100_gpio_irq_reg jh8100_sys_w_irq_reg = {
+ .is_reg_base = JH8100_SYS_W_GPIOIS0,
+ .ic_reg_base = JH8100_SYS_W_GPIOIC0,
+ .ibe_reg_base = JH8100_SYS_W_GPIOIBE0,
+ .iev_reg_base = JH8100_SYS_W_GPIOIEV0,
+ .ie_reg_base = JH8100_SYS_W_GPIOIE0,
+ .ris_reg_base = JH8100_SYS_W_GPIORIS0,
+ .mis_reg_base = JH8100_SYS_W_GPIOMIS0,
+ .ien_reg_base = JH8100_SYS_W_GPIOEN,
+};
+
+static const struct jh8100_pinctrl_domain_info jh8100_sys_w_pinctrl_info = {
+ .pins = jh8100_sys_w_pins,
+ .npins = ARRAY_SIZE(jh8100_sys_w_pins),
+ .ngpios = JH8100_SYS_W_NGPIO,
+ .gc_base = JH8100_SYS_W_GC_BASE,
+ .name = JH8100_SYS_W_DOMAIN_NAME,
+ .nregs = JH8100_SYS_W_REG_NUM,
+ .dout_reg_base = JH8100_SYS_W_DOUT,
+ .dout_mask = GENMASK(5, 0),
+ .doen_reg_base = JH8100_SYS_W_DOEN,
+ .doen_mask = GENMASK(4, 0),
+ .gpi_reg_base = JH8100_SYS_W_GPI,
+ .gpi_mask = GENMASK(4, 0),
+ .gpioin_reg_base = JH8100_SYS_W_GPIOIN,
+ .func_sel = jh8100_sys_w_func_sel,
+ .irq_reg = &jh8100_sys_w_irq_reg,
+ .mis_pin_num = JH8100_SYS_W_NGPIO,
+};
+
+static const struct of_device_id jh8100_sys_w_pinctrl_of_match[] = {
+ {
+ .compatible = "starfive,jh8100-sys-pinctrl-west",
+ .data = &jh8100_sys_w_pinctrl_info,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh8100_sys_w_pinctrl_of_match);
+
+static struct platform_driver jh8100_sys_w_pinctrl_driver = {
+ .probe = jh8100_pinctrl_probe,
+ .driver = {
+ .name = "starfive-jh8100-sys-pinctrl-west",
+#ifdef CONFIG_PM_SLEEP
+ .pm = &jh8100_sys_w_pinctrl_dev_pm_ops,
+#endif
+ .of_match_table = jh8100_sys_w_pinctrl_of_match,
+ },
+};
+module_platform_driver(jh8100_sys_w_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JH8100 SoC sys west controller");
+MODULE_AUTHOR("Alex Soo <yuklin.soo@starfivetech.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
index 4b68463ff5a5..8c3e4a90d68d 100644
--- a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
@@ -333,6 +333,9 @@ static int jh8100_set_one_pin_mux(struct jh8100_pinctrl *sfp,
if (!strcmp(sfp->info->name, JH8100_SYS_E_DOMAIN_NAME) &&
pin < sfp->gc.ngpio && func == 1)
jh8100_set_function(sfp, pin, func);
+ else if (!strcmp(sfp->info->name, JH8100_SYS_W_DOMAIN_NAME) &&
+ pin < sfp->gc.ngpio - 1 && func == 2)
+ jh8100_set_function(sfp, pin, func);

return 0;
}
@@ -410,6 +413,9 @@ static int jh8100_get_padcfg_base(struct jh8100_pinctrl *sfp,
if (!strcmp(sfp->info->name, JH8100_SYS_E_DOMAIN_NAME)) {
if (pin < JH8100_SYS_E_NGPIO)
return JH8100_SYS_E_GPO_PDA_00_47_CFG;
+ } else if (!strcmp(sfp->info->name, JH8100_SYS_W_DOMAIN_NAME)) {
+ if (pin < JH8100_SYS_W_NGPIO)
+ return JH8100_SYS_W_GPO_PDA_00_15_CFG;
}

return -ENXIO;
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
index 6eb4f1896a90..7c7a05c1c828 100644
--- a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
@@ -12,12 +12,16 @@

#include "../core.h"

+#define JH8100_SYS_W_DOMAIN_NAME "jh8100-sys-west"
#define JH8100_SYS_E_DOMAIN_NAME "jh8100-sys-east"

+#define JH8100_SYS_W_NGPIO 16
#define JH8100_SYS_E_NGPIO 48

+#define JH8100_SYS_W_REG_NUM 44
#define JH8100_SYS_E_REG_NUM 116

+#define JH8100_SYS_W_GPO_PDA_00_15_CFG 0x074
#define JH8100_SYS_E_GPO_PDA_00_47_CFG 0x114

struct jh8100_pinctrl {
@@ -30,6 +34,7 @@ struct jh8100_pinctrl {
/* register read/write mutex */
struct mutex mutex;
const struct jh8100_pinctrl_domain_info *info;
+ unsigned int jh8100_sys_west_regs[JH8100_SYS_W_REG_NUM];
unsigned int jh8100_sys_east_regs[JH8100_SYS_E_REG_NUM];
/* wakeup */
struct irq_domain *irq_domain;
--
2.25.1