[RFC PATCH v2 2/6] pinctrl: starfive: jh8100: add main and sys_east driver
From: Alex Soo
Date: Tue Feb 20 2024 - 01:58:49 EST
Add JH8100 pinctrl main and sys_east domain driver.
Signed-off-by: Alex Soo <yuklin.soo@xxxxxxxxxxxxxxxx>
---
drivers/pinctrl/starfive/Kconfig | 21 +
drivers/pinctrl/starfive/Makefile | 3 +
.../pinctrl-starfive-jh8100-sys-east.c | 224 ++++
.../starfive/pinctrl-starfive-jh8100.c | 1181 +++++++++++++++++
.../starfive/pinctrl-starfive-jh8100.h | 94 ++
5 files changed, 1523 insertions(+)
create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-east.c
create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
create mode 100644 drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig
index 8192ac2087fc..afcbf9d4dc8d 100644
--- a/drivers/pinctrl/starfive/Kconfig
+++ b/drivers/pinctrl/starfive/Kconfig
@@ -49,3 +49,24 @@ config PINCTRL_STARFIVE_JH7110_AON
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
+ bool
+ select GENERIC_PINCONF
+ select GENERIC_PINCTRL_GROUPS
+ select GENERIC_PINMUX_FUNCTIONS
+ select GPIOLIB
+ select GPIOLIB_IRQCHIP
+ select OF_GPIO
+
+config PINCTRL_STARFIVE_JH8100_SYS_EAST
+ tristate "StarFive JH8100 SoC System IOMUX-East 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-east 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 ee0d32d085cb..45698c502b48 100644
--- a/drivers/pinctrl/starfive/Makefile
+++ b/drivers/pinctrl/starfive/Makefile
@@ -5,3 +5,6 @@ obj-$(CONFIG_PINCTRL_STARFIVE_JH7100) += pinctrl-starfive-jh7100.o
obj-$(CONFIG_PINCTRL_STARFIVE_JH7110) += pinctrl-starfive-jh7110.o
obj-$(CONFIG_PINCTRL_STARFIVE_JH7110_SYS) += pinctrl-starfive-jh7110-sys.o
obj-$(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
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-east.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-east.c
new file mode 100644
index 000000000000..395ee9f86298
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100-sys-east.c
@@ -0,0 +1,224 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JH8100 SoC sys east controller
+ *
+ * Copyright (C) 2023-2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo@xxxxxxxxxxxxxxxx>
+ *
+ */
+
+#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 "../core.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "pinctrl-starfive-jh8100.h"
+
+#define JH8100_SYS_E_NGPIO 48
+#define JH8100_SYS_E_GC_BASE 16
+
+/* registers */
+#define JH8100_SYS_E_DOEN 0x000
+#define JH8100_SYS_E_DOUT 0x030
+#define JH8100_SYS_E_GPI 0x060
+#define JH8100_SYS_E_GPIOIN 0x0f4
+
+#define JH8100_SYS_E_GPIOEN 0x0b8
+#define JH8100_SYS_E_GPIOIS0 0x0bc
+#define JH8100_SYS_E_GPIOIS1 0x0c0
+#define JH8100_SYS_E_GPIOIC0 0x0c4
+#define JH8100_SYS_E_GPIOIC1 0x0c8
+#define JH8100_SYS_E_GPIOIBE0 0x0cc
+#define JH8100_SYS_E_GPIOIBE1 0x0d0
+#define JH8100_SYS_E_GPIOIEV0 0x0d4
+#define JH8100_SYS_E_GPIOIEV1 0x0d8
+#define JH8100_SYS_E_GPIOIE0 0x0dc
+#define JH8100_SYS_E_GPIOIE1 0x0e0
+#define JH8100_SYS_E_GPIORIS0 0x0e4
+#define JH8100_SYS_E_GPIORIS1 0x0e8
+#define JH8100_SYS_E_GPIOMIS0 0x0ec
+#define JH8100_SYS_E_GPIOMIS1 0x0f0
+
+static const struct pinctrl_pin_desc jh8100_sys_e_pins[] = {
+ PINCTRL_PIN(PAD_GPIO0_E, "SYS_E_GPIO0"),
+ PINCTRL_PIN(PAD_GPIO1_E, "SYS_E_GPIO1"),
+ PINCTRL_PIN(PAD_GPIO2_E, "SYS_E_GPIO2"),
+ PINCTRL_PIN(PAD_GPIO3_E, "SYS_E_GPIO3"),
+ PINCTRL_PIN(PAD_GPIO4_E, "SYS_E_GPIO4"),
+ PINCTRL_PIN(PAD_GPIO5_E, "SYS_E_GPIO5"),
+ PINCTRL_PIN(PAD_GPIO6_E, "SYS_E_GPIO6"),
+ PINCTRL_PIN(PAD_GPIO7_E, "SYS_E_GPIO7"),
+ PINCTRL_PIN(PAD_GPIO8_E, "SYS_E_GPIO8"),
+ PINCTRL_PIN(PAD_GPIO9_E, "SYS_E_GPIO9"),
+ PINCTRL_PIN(PAD_GPIO10_E, "SYS_E_GPIO10"),
+ PINCTRL_PIN(PAD_GPIO11_E, "SYS_E_GPIO11"),
+ PINCTRL_PIN(PAD_GPIO12_E, "SYS_E_GPIO12"),
+ PINCTRL_PIN(PAD_GPIO13_E, "SYS_E_GPIO13"),
+ PINCTRL_PIN(PAD_GPIO14_E, "SYS_E_GPIO14"),
+ PINCTRL_PIN(PAD_GPIO15_E, "SYS_E_GPIO15"),
+ PINCTRL_PIN(PAD_GPIO16_E, "SYS_E_GPIO16"),
+ PINCTRL_PIN(PAD_GPIO17_E, "SYS_E_GPIO17"),
+ PINCTRL_PIN(PAD_GPIO18_E, "SYS_E_GPIO18"),
+ PINCTRL_PIN(PAD_GPIO19_E, "SYS_E_GPIO19"),
+ PINCTRL_PIN(PAD_GPIO20_E, "SYS_E_GPIO20"),
+ PINCTRL_PIN(PAD_GPIO21_E, "SYS_E_GPIO21"),
+ PINCTRL_PIN(PAD_GPIO22_E, "SYS_E_GPIO22"),
+ PINCTRL_PIN(PAD_GPIO23_E, "SYS_E_GPIO23"),
+ PINCTRL_PIN(PAD_GPIO24_E, "SYS_E_GPIO24"),
+ PINCTRL_PIN(PAD_GPIO25_E, "SYS_E_GPIO25"),
+ PINCTRL_PIN(PAD_GPIO26_E, "SYS_E_GPIO26"),
+ PINCTRL_PIN(PAD_GPIO27_E, "SYS_E_GPIO27"),
+ PINCTRL_PIN(PAD_GPIO28_E, "SYS_E_GPIO28"),
+ PINCTRL_PIN(PAD_GPIO29_E, "SYS_E_GPIO29"),
+ PINCTRL_PIN(PAD_GPIO30_E, "SYS_E_GPIO30"),
+ PINCTRL_PIN(PAD_GPIO31_E, "SYS_E_GPIO31"),
+ PINCTRL_PIN(PAD_GPIO32_E, "SYS_E_GPIO32"),
+ PINCTRL_PIN(PAD_GPIO33_E, "SYS_E_GPIO33"),
+ PINCTRL_PIN(PAD_GPIO34_E, "SYS_E_GPIO34"),
+ PINCTRL_PIN(PAD_GPIO35_E, "SYS_E_GPIO35"),
+ PINCTRL_PIN(PAD_GPIO36_E, "SYS_E_GPIO36"),
+ PINCTRL_PIN(PAD_GPIO37_E, "SYS_E_GPIO37"),
+ PINCTRL_PIN(PAD_GPIO38_E, "SYS_E_GPIO38"),
+ PINCTRL_PIN(PAD_GPIO39_E, "SYS_E_GPIO39"),
+ PINCTRL_PIN(PAD_GPIO40_E, "SYS_E_GPIO40"),
+ PINCTRL_PIN(PAD_GPIO41_E, "SYS_E_GPIO41"),
+ PINCTRL_PIN(PAD_GPIO42_E, "SYS_E_GPIO42"),
+ PINCTRL_PIN(PAD_GPIO43_E, "SYS_E_GPIO43"),
+ PINCTRL_PIN(PAD_GPIO44_E, "SYS_E_GPIO44"),
+ PINCTRL_PIN(PAD_GPIO45_E, "SYS_E_GPIO45"),
+ PINCTRL_PIN(PAD_GPIO46_E, "SYS_E_GPIO46"),
+ PINCTRL_PIN(PAD_GPIO47_E, "SYS_E_GPIO47"),
+};
+
+static const struct jh8100_gpio_func_sel
+ jh8100_sys_e_func_sel[ARRAY_SIZE(jh8100_sys_e_pins)] = {
+ [PAD_GPIO20_E] = { 0x1d4, 0, 2 },
+ [PAD_GPIO21_E] = { 0x1d4, 2, 2 },
+ [PAD_GPIO22_E] = { 0x1d4, 4, 2 },
+ [PAD_GPIO23_E] = { 0x1d4, 6, 2 },
+ [PAD_GPIO24_E] = { 0x1d4, 8, 2 },
+ [PAD_GPIO25_E] = { 0x1d4, 10, 2 },
+ [PAD_GPIO26_E] = { 0x1d4, 12, 2 },
+ [PAD_GPIO27_E] = { 0x1d4, 14, 2 },
+ [PAD_GPIO28_E] = { 0x1d4, 16, 2 },
+ [PAD_GPIO29_E] = { 0x1d4, 18, 2 },
+ [PAD_GPIO30_E] = { 0x1d4, 20, 2 },
+ [PAD_GPIO31_E] = { 0x1d4, 22, 2 },
+ [PAD_GPIO32_E] = { 0x1d4, 24, 2 },
+ [PAD_GPIO33_E] = { 0x1d4, 26, 2 },
+ [PAD_GPIO34_E] = { 0x1d4, 28, 2 },
+ [PAD_GPIO35_E] = { 0x1d4, 30, 2 },
+
+ [PAD_GPIO36_E] = { 0x1d8, 0, 2 },
+ [PAD_GPIO37_E] = { 0x1d8, 2, 2 },
+ [PAD_GPIO38_E] = { 0x1d8, 4, 2 },
+ [PAD_GPIO39_E] = { 0x1d8, 6, 2 },
+ [PAD_GPIO40_E] = { 0x1d8, 8, 2 },
+ [PAD_GPIO41_E] = { 0x1d8, 10, 2 },
+ [PAD_GPIO42_E] = { 0x1d8, 12, 2 },
+ [PAD_GPIO43_E] = { 0x1d8, 14, 2 },
+ [PAD_GPIO44_E] = { 0x1d8, 16, 2 },
+ [PAD_GPIO45_E] = { 0x1d8, 18, 2 },
+ [PAD_GPIO46_E] = { 0x1d8, 20, 2 },
+ [PAD_GPIO47_E] = { 0x1d8, 22, 2 },
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int jh8100_sys_e_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_east_regs[i] = readl_relaxed(sfp->base + (i * 4));
+
+ return pinctrl_force_sleep(sfp->pctl);
+}
+
+static int jh8100_sys_e_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_east_regs[i], sfp->base + (i * 4));
+
+ return pinctrl_force_default(sfp->pctl);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(jh8100_sys_e_pinctrl_dev_pm_ops,
+ jh8100_sys_e_pinctrl_suspend,
+ jh8100_sys_e_pinctrl_resume);
+
+static const struct jh8100_gpio_irq_reg jh8100_sys_e_irq_reg = {
+ .is_reg_base = JH8100_SYS_E_GPIOIS0,
+ .ic_reg_base = JH8100_SYS_E_GPIOIC0,
+ .ic1_reg_base = JH8100_SYS_E_GPIOIC1,
+ .ibe_reg_base = JH8100_SYS_E_GPIOIBE0,
+ .iev_reg_base = JH8100_SYS_E_GPIOIEV0,
+ .ie_reg_base = JH8100_SYS_E_GPIOIE0,
+ .ris_reg_base = JH8100_SYS_E_GPIORIS0,
+ .mis_reg_base = JH8100_SYS_E_GPIOMIS0,
+ .mis1_reg_base = JH8100_SYS_E_GPIOMIS1,
+ .ien_reg_base = JH8100_SYS_E_GPIOEN,
+};
+
+static const struct jh8100_pinctrl_domain_info jh8100_sys_e_pinctrl_info = {
+ .pins = jh8100_sys_e_pins,
+ .npins = ARRAY_SIZE(jh8100_sys_e_pins),
+ .ngpios = JH8100_SYS_E_NGPIO,
+ .gc_base = JH8100_SYS_E_GC_BASE,
+ .name = JH8100_SYS_E_DOMAIN_NAME,
+ .nregs = JH8100_SYS_E_REG_NUM,
+ .dout_reg_base = JH8100_SYS_E_DOUT,
+ .dout_mask = GENMASK(6, 0),
+ .doen_reg_base = JH8100_SYS_E_DOEN,
+ .doen_mask = GENMASK(5, 0),
+ .gpi_reg_base = JH8100_SYS_E_GPI,
+ .gpi_mask = GENMASK(5, 0),
+ .gpioin_reg_base = JH8100_SYS_E_GPIOIN,
+ .func_sel = jh8100_sys_e_func_sel,
+ .irq_reg = &jh8100_sys_e_irq_reg,
+ .mis_pin_num = 32,
+ .mis1_pin_num = 16,
+};
+
+static const struct of_device_id jh8100_sys_e_pinctrl_of_match[] = {
+ {
+ .compatible = "starfive,jh8100-sys-pinctrl-east",
+ .data = &jh8100_sys_e_pinctrl_info,
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh8100_sys_e_pinctrl_of_match);
+
+static struct platform_driver jh8100_sys_e_pinctrl_driver = {
+ .probe = jh8100_pinctrl_probe,
+ .driver = {
+ .name = "starfive-jh8100-sys-pinctrl-east",
+#ifdef CONFIG_PM_SLEEP
+ .pm = &jh8100_sys_e_pinctrl_dev_pm_ops,
+#endif
+ .of_match_table = jh8100_sys_e_pinctrl_of_match,
+ },
+};
+module_platform_driver(jh8100_sys_e_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for StarFive JH8100 SoC sys east controller");
+MODULE_AUTHOR("Alex Soo <yuklin.soo@xxxxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
new file mode 100644
index 000000000000..f21357ee0c20
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.c
@@ -0,0 +1,1181 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Pinctrl / GPIO driver for StarFive JH8100 SoC
+ *
+ * Copyright (C) 2023-2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo@xxxxxxxxxxxxxxxx>
+ *
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/pm_wakeirq.h>
+#include <linux/reset.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+
+#include <linux/pinctrl/consumer.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/starfive,jh8100-pinctrl.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "pinctrl-starfive-jh8100.h"
+
+/* pad control bits */
+#define JH8100_PADCFG_POS BIT(7)
+#define JH8100_PADCFG_SMT BIT(6)
+#define JH8100_PADCFG_SLEW BIT(5)
+#define JH8100_PADCFG_PD BIT(4)
+#define JH8100_PADCFG_PU BIT(3)
+#define JH8100_PADCFG_BIAS_MASK (JH8100_PADCFG_PD | JH8100_PADCFG_PU)
+#define JH8100_PADCFG_DS_MASK GENMASK(2, 1)
+#define JH8100_PADCFG_DS_2MA (0U << 1)
+#define JH8100_PADCFG_DS_4MA (1U << 1)
+#define JH8100_PADCFG_DS_8MA (2U << 1)
+#define JH8100_PADCFG_DS_12MA (3U << 1)
+#define JH8100_PADCFG_IE BIT(0)
+
+/*
+ * The packed pinmux values from the device tree look like this:
+ *
+ * | 31 - 24 | 23 - 16 | 15 - 10 | 9 - 8 | 7 - 0 |
+ * | din | dout | doen | function | pin |
+ */
+static unsigned int jh8100_pinmux_din(u32 v)
+{
+ return (v & GENMASK(31, 24)) >> 24;
+}
+
+static u32 jh8100_pinmux_dout(u32 v)
+{
+ return (v & GENMASK(23, 16)) >> 16;
+}
+
+static u32 jh8100_pinmux_doen(u32 v)
+{
+ return (v & GENMASK(15, 10)) >> 10;
+}
+
+static u32 jh8100_pinmux_function(u32 v)
+{
+ return (v & GENMASK(9, 8)) >> 8;
+}
+
+static unsigned int jh8100_pinmux_pin(u32 v)
+{
+ return v & GENMASK(7, 0);
+}
+
+static struct jh8100_pinctrl *jh8100_from_irq_data(struct irq_data *d)
+{
+ struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+ return container_of(gc, struct jh8100_pinctrl, gc);
+}
+
+struct jh8100_pinctrl *jh8100_from_irq_desc(struct irq_desc *desc)
+{
+ struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+
+ return container_of(gc, struct jh8100_pinctrl, gc);
+}
+EXPORT_SYMBOL_GPL(jh8100_from_irq_desc);
+
+#ifdef CONFIG_DEBUG_FS
+static void jh8100_pin_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct jh8100_pinctrl_domain_info *info = sfp->info;
+
+ seq_printf(s, "%s", dev_name(pctldev->dev));
+
+ if (pin < sfp->gc.ngpio) {
+ unsigned int offset = 4 * (pin / 4);
+ unsigned int shift = 8 * (pin % 4);
+ u32 dout = readl_relaxed(sfp->base + info->dout_reg_base + offset);
+ u32 doen = readl_relaxed(sfp->base + info->doen_reg_base + offset);
+ u32 gpi = readl_relaxed(sfp->base + info->gpi_reg_base + offset);
+
+ dout = (dout >> shift) & info->dout_mask;
+ doen = (doen >> shift) & info->doen_mask;
+ gpi = ((gpi >> shift) - 2) & info->gpi_mask;
+
+ seq_printf(s, " dout=%u doen=%u din=%u", dout, doen, gpi);
+ }
+}
+#else
+#define jh8100_pin_dbg_show NULL
+#endif
+
+static int jh8100_dt_node_to_map(struct pinctrl_dev *pctldev,
+ struct device_node *np,
+ struct pinctrl_map **maps,
+ unsigned int *num_maps)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ struct device *dev = sfp->gc.parent;
+ struct device_node *child;
+ struct pinctrl_map *map;
+ const char **pgnames;
+ const char *grpname;
+ int ngroups;
+ int nmaps;
+ int ret;
+
+ ngroups = 0;
+ for_each_child_of_node(np, child)
+ ngroups += 1;
+ nmaps = 2 * ngroups;
+
+ pgnames = devm_kcalloc(dev, ngroups, sizeof(*pgnames), GFP_KERNEL);
+ if (!pgnames)
+ return -ENOMEM;
+
+ map = kcalloc(nmaps, sizeof(*map), GFP_KERNEL);
+ if (!map)
+ return -ENOMEM;
+
+ nmaps = 0;
+ ngroups = 0;
+ mutex_lock(&sfp->mutex);
+ for_each_child_of_node(np, child) {
+ int npins = of_property_count_u32_elems(child, "pinmux");
+ int *pins;
+ u32 *pinmux;
+ int i;
+
+ if (npins < 1) {
+ dev_err(dev,
+ "invalid pinctrl group %pOFn.%pOFn: pinmux not set\n",
+ np, child);
+ ret = -EINVAL;
+ goto put_child;
+ }
+
+ grpname = devm_kasprintf(dev, GFP_KERNEL, "%pOFn.%pOFn", np, child);
+ if (!grpname) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pgnames[ngroups++] = grpname;
+
+ pins = devm_kcalloc(dev, npins, sizeof(*pins), GFP_KERNEL);
+ if (!pins) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ pinmux = devm_kcalloc(dev, npins, sizeof(*pinmux), GFP_KERNEL);
+ if (!pinmux) {
+ ret = -ENOMEM;
+ goto put_child;
+ }
+
+ ret = of_property_read_u32_array(child, "pinmux", pinmux, npins);
+ if (ret)
+ goto put_child;
+
+ for (i = 0; i < npins; i++)
+ pins[i] = jh8100_pinmux_pin(pinmux[i]);
+
+ map[nmaps].type = PIN_MAP_TYPE_MUX_GROUP;
+ map[nmaps].data.mux.function = np->name;
+ map[nmaps].data.mux.group = grpname;
+ nmaps += 1;
+
+ ret = pinctrl_generic_add_group(pctldev, grpname,
+ pins, npins, pinmux);
+ if (ret < 0) {
+ dev_err(dev, "error adding group %s: %d\n", grpname, ret);
+ goto put_child;
+ }
+
+ ret = pinconf_generic_parse_dt_config(child, pctldev,
+ &map[nmaps].data.configs.configs,
+ &map[nmaps].data.configs.num_configs);
+ if (ret) {
+ dev_err(dev, "error parsing pin config of group %s: %d\n",
+ grpname, ret);
+ goto put_child;
+ }
+
+ /* don't create a map if there are no pinconf settings */
+ if (map[nmaps].data.configs.num_configs == 0)
+ continue;
+
+ map[nmaps].type = PIN_MAP_TYPE_CONFIGS_GROUP;
+ map[nmaps].data.configs.group_or_pin = grpname;
+ nmaps += 1;
+ }
+
+ ret = pinmux_generic_add_function(pctldev, np->name,
+ pgnames, ngroups, NULL);
+ if (ret < 0) {
+ dev_err(dev, "error adding function %s: %d\n", np->name, ret);
+ goto free_map;
+ }
+ mutex_unlock(&sfp->mutex);
+
+ *maps = map;
+ *num_maps = nmaps;
+ return 0;
+
+put_child:
+ of_node_put(child);
+free_map:
+ pinctrl_utils_free_map(pctldev, map, nmaps);
+ mutex_unlock(&sfp->mutex);
+ return ret;
+}
+
+static const struct pinctrl_ops jh8100_pinctrl_ops = {
+ .get_groups_count = pinctrl_generic_get_group_count,
+ .get_group_name = pinctrl_generic_get_group_name,
+ .get_group_pins = pinctrl_generic_get_group_pins,
+ .pin_dbg_show = jh8100_pin_dbg_show,
+ .dt_node_to_map = jh8100_dt_node_to_map,
+ .dt_free_map = pinctrl_utils_free_map,
+};
+
+void jh8100_set_gpiomux(struct jh8100_pinctrl *sfp, unsigned int pin,
+ unsigned int din, u32 dout, u32 doen)
+{
+ const struct jh8100_pinctrl_domain_info *info = sfp->info;
+
+ unsigned int offset = 4 * (pin / 4);
+ unsigned int shift = 8 * (pin % 4);
+ u32 dout_mask = info->dout_mask << shift;
+ u32 done_mask = info->doen_mask << shift;
+ u32 ival, imask;
+ u32 tmp;
+ void __iomem *reg_dout;
+ void __iomem *reg_doen;
+ void __iomem *reg_din;
+ unsigned long flags;
+
+ reg_dout = sfp->base + info->dout_reg_base + offset;
+ reg_doen = sfp->base + info->doen_reg_base + offset;
+ dout <<= shift;
+ doen <<= shift;
+ if (din != GPI_NONE) {
+ unsigned int ioffset = 4 * (din / 4);
+ unsigned int ishift = 8 * (din % 4);
+
+ reg_din = sfp->base + info->gpi_reg_base + ioffset;
+ ival = (pin + 2) << ishift;
+ imask = info->gpi_mask << ishift;
+ } else {
+ reg_din = NULL;
+ }
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ dout |= readl_relaxed(reg_dout) & ~dout_mask;
+ writel_relaxed(dout, reg_dout);
+ doen |= readl_relaxed(reg_doen) & ~done_mask;
+ writel_relaxed(doen, reg_doen);
+ if (reg_din) {
+ tmp = readl_relaxed(reg_din) & ~imask;
+ writel_relaxed(tmp, reg_din);
+ ival |= readl_relaxed(reg_din) & ~imask;
+ writel_relaxed(ival, reg_din);
+ }
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh8100_set_function(struct jh8100_pinctrl *sfp,
+ unsigned int pin, u32 func)
+{
+ const struct jh8100_gpio_func_sel *fs = &sfp->info->func_sel[pin];
+ unsigned long flags;
+ void __iomem *reg;
+ u32 mask;
+
+ if (!fs->offset)
+ return;
+
+ if (func > fs->max)
+ return;
+
+ reg = sfp->base + fs->offset;
+ func = func << fs->shift;
+ mask = 0x3U << fs->shift;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ func |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(func, reg);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh8100_set_one_pin_mux(struct jh8100_pinctrl *sfp,
+ unsigned int pin,
+ unsigned int din, u32 dout,
+ u32 doen, u32 func)
+{
+ if (pin < sfp->gc.ngpio && func == 0)
+ jh8100_set_gpiomux(sfp, pin, din, dout, doen);
+
+ if (!strcmp(sfp->info->name, JH8100_SYS_E_DOMAIN_NAME) &&
+ pin < sfp->gc.ngpio && func == 1)
+ jh8100_set_function(sfp, pin, func);
+
+ return 0;
+}
+
+static int jh8100_set_mux(struct pinctrl_dev *pctldev,
+ unsigned int fsel, unsigned int gsel)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct group_desc *group;
+ const u32 *pinmux;
+ unsigned int i;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ pinmux = group->data;
+
+ for (i = 0; i < group->grp.npins; i++) {
+ u32 v = pinmux[i];
+
+ jh8100_set_one_pin_mux(sfp,
+ jh8100_pinmux_pin(v),
+ jh8100_pinmux_din(v),
+ jh8100_pinmux_dout(v),
+ jh8100_pinmux_doen(v),
+ jh8100_pinmux_function(v));
+ }
+
+ return 0;
+}
+
+static const struct pinmux_ops jh8100_pinmux_ops = {
+ .get_functions_count = pinmux_generic_get_function_count,
+ .get_function_name = pinmux_generic_get_function_name,
+ .get_function_groups = pinmux_generic_get_function_groups,
+ .set_mux = jh8100_set_mux,
+ .strict = true,
+};
+
+static const u8 jh8100_drive_strength_mA[4] = { 2, 4, 8, 12 };
+
+static u32 jh8100_padcfg_ds_to_mA(u32 padcfg)
+{
+ return jh8100_drive_strength_mA[(padcfg >> 1) & 3U];
+}
+
+static u32 jh8100_padcfg_ds_from_mA(u32 v)
+{
+ int i;
+
+ for (i = 0; i < 3; i++) {
+ if (v <= jh8100_drive_strength_mA[i])
+ break;
+ }
+ return i << 1;
+}
+
+static int jh8100_get_padcfg_base(struct jh8100_pinctrl *sfp,
+ unsigned int pin)
+{
+ if (!strcmp(sfp->info->name, JH8100_SYS_E_DOMAIN_NAME)) {
+ if (pin <= PAD_GPIO47_E)
+ return JH8100_SYS_E_GPO_PDA_00_47_CFG;
+ }
+
+ return -ENXIO;
+}
+
+static void jh8100_padcfg_rmw(struct jh8100_pinctrl *sfp,
+ unsigned int pin, u32 mask, u32 value)
+{
+ void __iomem *reg;
+ unsigned long flags;
+ int padcfg_base;
+
+ padcfg_base = jh8100_get_padcfg_base(sfp, pin);
+ if (padcfg_base < 0)
+ return;
+
+ reg = sfp->base + padcfg_base + 4 * pin;
+ value &= mask;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value |= readl_relaxed(reg) & ~mask;
+ writel_relaxed(value, reg);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh8100_pinconf_get(struct pinctrl_dev *pctldev,
+ unsigned int pin, unsigned long *config)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ int param = pinconf_to_config_param(*config);
+ u32 padcfg, arg;
+ bool enabled;
+ int padcfg_base;
+
+ padcfg_base = jh8100_get_padcfg_base(sfp, pin);
+ if (padcfg_base < 0)
+ return 0;
+
+ padcfg = readl_relaxed(sfp->base + padcfg_base + 4 * pin);
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ enabled = !(padcfg & JH8100_PADCFG_BIAS_MASK);
+ arg = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ enabled = padcfg & JH8100_PADCFG_PD;
+ arg = 1;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ enabled = padcfg & JH8100_PADCFG_PU;
+ arg = 1;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ enabled = true;
+ arg = jh8100_padcfg_ds_to_mA(padcfg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ enabled = padcfg & JH8100_PADCFG_IE;
+ arg = enabled;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ enabled = padcfg & JH8100_PADCFG_SMT;
+ arg = enabled;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ enabled = true;
+ arg = !!(padcfg & JH8100_PADCFG_SLEW);
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ *config = pinconf_to_config_packed(param, arg);
+ return enabled ? 0 : -EINVAL;
+}
+
+static int jh8100_pinconf_set(struct pinctrl_dev *pctldev,
+ unsigned int gpio, unsigned long *config,
+ unsigned int num_configs)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ u32 param;
+ u32 arg;
+ u32 value;
+ u32 mask;
+ int i;
+
+ for (i = 0; i < num_configs; i++) {
+ param = pinconf_to_config_param(config[i]);
+ arg = pinconf_to_config_argument(config[i]);
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask = JH8100_PADCFG_BIAS_MASK;
+ value = 0;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask = JH8100_PADCFG_BIAS_MASK;
+ value = JH8100_PADCFG_PD;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask = JH8100_PADCFG_BIAS_MASK;
+ value = JH8100_PADCFG_PU;
+ break;
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ return 0;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask = JH8100_PADCFG_IE;
+ value = arg ? JH8100_PADCFG_IE : 0;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask = JH8100_PADCFG_SMT;
+ value = arg ? JH8100_PADCFG_SMT : 0;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+
+ jh8100_padcfg_rmw(sfp, gpio, mask, value);
+ }
+
+ return 0;
+}
+
+static int jh8100_pinconf_group_get(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ unsigned long *config)
+{
+ const struct group_desc *group;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ return jh8100_pinconf_get(pctldev, group->grp.pins[0], config);
+}
+
+static int jh8100_pinconf_group_set(struct pinctrl_dev *pctldev,
+ unsigned int gsel,
+ unsigned long *configs,
+ unsigned int num_configs)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ const struct group_desc *group;
+ u16 mask, value;
+ int i;
+
+ group = pinctrl_generic_get_group(pctldev, gsel);
+ if (!group)
+ return -EINVAL;
+
+ mask = 0;
+ value = 0;
+ for (i = 0; i < num_configs; i++) {
+ int param = pinconf_to_config_param(configs[i]);
+ u32 arg = pinconf_to_config_argument(configs[i]);
+
+ switch (param) {
+ case PIN_CONFIG_BIAS_DISABLE:
+ mask |= JH8100_PADCFG_BIAS_MASK;
+ value &= ~JH8100_PADCFG_BIAS_MASK;
+ break;
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask |= JH8100_PADCFG_BIAS_MASK;
+ value = (value & ~JH8100_PADCFG_BIAS_MASK) | JH8100_PADCFG_PD;
+ break;
+ case PIN_CONFIG_BIAS_PULL_UP:
+ if (arg == 0)
+ return -ENOTSUPP;
+ mask |= JH8100_PADCFG_BIAS_MASK;
+ value = (value & ~JH8100_PADCFG_BIAS_MASK) | JH8100_PADCFG_PU;
+ break;
+ case PIN_CONFIG_DRIVE_STRENGTH:
+ mask |= JH8100_PADCFG_DS_MASK;
+ value = (value & ~JH8100_PADCFG_DS_MASK) |
+ jh8100_padcfg_ds_from_mA(arg);
+ break;
+ case PIN_CONFIG_INPUT_ENABLE:
+ mask |= JH8100_PADCFG_IE;
+ if (arg)
+ value |= JH8100_PADCFG_IE;
+ else
+ value &= ~JH8100_PADCFG_IE;
+ break;
+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ mask |= JH8100_PADCFG_SMT;
+ if (arg)
+ value |= JH8100_PADCFG_SMT;
+ else
+ value &= ~JH8100_PADCFG_SMT;
+ break;
+ case PIN_CONFIG_SLEW_RATE:
+ mask |= JH8100_PADCFG_SLEW;
+ if (arg)
+ value |= JH8100_PADCFG_SLEW;
+ else
+ value &= ~JH8100_PADCFG_SLEW;
+ break;
+ default:
+ return -ENOTSUPP;
+ }
+ }
+
+ for (i = 0; i < group->grp.npins; i++)
+ jh8100_padcfg_rmw(sfp, group->grp.pins[i], mask, value);
+
+ return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void jh8100_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+ struct seq_file *s, unsigned int pin)
+{
+ struct jh8100_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+ u32 value;
+ int padcfg_base;
+
+ padcfg_base = jh8100_get_padcfg_base(sfp, pin);
+ if (padcfg_base < 0)
+ return;
+
+ value = readl_relaxed(sfp->base + padcfg_base + 4 * pin);
+ seq_printf(s, " (0x%02x)", value);
+}
+#else
+#define jh8100_pinconf_dbg_show NULL
+#endif
+
+static const struct pinconf_ops jh8100_pinconf_ops = {
+ .pin_config_get = jh8100_pinconf_get,
+ .pin_config_set = jh8100_pinconf_set,
+ .pin_config_group_get = jh8100_pinconf_group_get,
+ .pin_config_group_set = jh8100_pinconf_group_set,
+ .pin_config_dbg_show = jh8100_pinconf_dbg_show,
+ .is_generic = true,
+};
+
+static int jh8100_gpio_get_direction(struct gpio_chip *gc,
+ unsigned int gpio)
+{
+ struct jh8100_pinctrl *sfp = container_of(gc,
+ struct jh8100_pinctrl, gc);
+ const struct jh8100_pinctrl_domain_info *info = sfp->info;
+ unsigned int offset = 4 * (gpio / 4);
+ unsigned int shift = 8 * (gpio % 4);
+ u32 doen = readl_relaxed(sfp->base + info->doen_reg_base + offset);
+
+ doen = (doen >> shift) & info->doen_mask;
+
+ return doen == GPOEN_ENABLE ?
+ GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
+}
+
+static int jh8100_gpio_direction_input(struct gpio_chip *gc,
+ unsigned int gpio)
+{
+ struct jh8100_pinctrl *sfp = container_of(gc,
+ struct jh8100_pinctrl, gc);
+
+ /* enable input and schmitt trigger */
+ jh8100_padcfg_rmw(sfp, gpio,
+ JH8100_PADCFG_IE | JH8100_PADCFG_SMT,
+ JH8100_PADCFG_IE | JH8100_PADCFG_SMT);
+
+ jh8100_set_one_pin_mux(sfp, gpio,
+ GPI_NONE, GPOUT_LOW, GPOEN_DISABLE, 0);
+
+ return 0;
+}
+
+static int jh8100_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int gpio, int value)
+{
+ struct jh8100_pinctrl *sfp = container_of(gc,
+ struct jh8100_pinctrl, gc);
+
+ jh8100_set_one_pin_mux(sfp, gpio,
+ GPI_NONE, value ? GPOUT_HIGH : GPOUT_LOW,
+ GPOEN_ENABLE, 0);
+
+ /* disable input, schmitt trigger and bias */
+ jh8100_padcfg_rmw(sfp, gpio,
+ JH8100_PADCFG_IE | JH8100_PADCFG_SMT |
+ JH8100_PADCFG_BIAS_MASK, 0);
+ return 0;
+}
+
+static int jh8100_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+ struct jh8100_pinctrl *sfp = container_of(gc,
+ struct jh8100_pinctrl, gc);
+ const struct jh8100_pinctrl_domain_info *info = sfp->info;
+ void __iomem *reg = sfp->base + info->gpioin_reg_base
+ + 4 * (gpio / 32);
+
+ return !!(readl_relaxed(reg) & BIT(gpio % 32));
+}
+
+static void jh8100_gpio_set(struct gpio_chip *gc,
+ unsigned int gpio, int value)
+{
+ struct jh8100_pinctrl *sfp = container_of(gc,
+ struct jh8100_pinctrl, gc);
+ const struct jh8100_pinctrl_domain_info *info = sfp->info;
+ unsigned int offset = 4 * (gpio / 4);
+ unsigned int shift = 8 * (gpio % 4);
+ void __iomem *reg_dout = sfp->base + info->dout_reg_base + offset;
+ u32 dout = (value ? GPOUT_HIGH : GPOUT_LOW) << shift;
+ u32 mask = info->dout_mask << shift;
+ unsigned long flags;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ dout |= readl_relaxed(reg_dout) & ~mask;
+ writel_relaxed(dout, reg_dout);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh8100_irq_ack(struct irq_data *d)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+ const struct jh8100_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ic = sfp->base + irq_reg->ic_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ic) & ~mask;
+ writel_relaxed(value, ic);
+ writel_relaxed(value | mask, ic);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh8100_irq_mask(struct irq_data *d)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+ const struct jh8100_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + irq_reg->ie_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) & ~mask;
+ writel_relaxed(value, ie);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+
+ gpiochip_disable_irq(&sfp->gc, d->hwirq);
+}
+
+static void jh8100_irq_mask_ack(struct irq_data *d)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+ const struct jh8100_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + irq_reg->ie_reg_base
+ + 4 * (gpio / 32);
+ void __iomem *ic = sfp->base + irq_reg->ic_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) & ~mask;
+ writel_relaxed(value, ie);
+
+ value = readl_relaxed(ic) & ~mask;
+ writel_relaxed(value, ic);
+ writel_relaxed(value | mask, ic);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static void jh8100_irq_unmask(struct irq_data *d)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+ const struct jh8100_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *ie = sfp->base + irq_reg->ie_reg_base
+ + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ unsigned long flags;
+ u32 value;
+
+ gpiochip_enable_irq(&sfp->gc, d->hwirq);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ value = readl_relaxed(ie) | mask;
+ writel_relaxed(value, ie);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh8100_irq_set_type(struct irq_data *d, unsigned int trigger)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+ const struct jh8100_gpio_irq_reg *irq_reg = sfp->info->irq_reg;
+ irq_hw_number_t gpio = irqd_to_hwirq(d);
+ void __iomem *base = sfp->base + 4 * (gpio / 32);
+ u32 mask = BIT(gpio % 32);
+ u32 irq_type, edge_both, polarity;
+ unsigned long flags;
+
+ switch (trigger) {
+ case IRQ_TYPE_EDGE_RISING:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = 0; /* 0: single edge */
+ polarity = mask; /* 1: rising edge */
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = 0; /* 0: single edge */
+ polarity = 0; /* 0: falling edge */
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ irq_type = mask; /* 1: edge triggered */
+ edge_both = mask; /* 1: both edges */
+ polarity = 0; /* 0: ignored */
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ irq_type = 0; /* 0: level triggered */
+ edge_both = 0; /* 0: ignored */
+ polarity = mask; /* 1: high level */
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ irq_type = 0; /* 0: level triggered */
+ edge_both = 0; /* 0: ignored */
+ polarity = 0; /* 0: low level */
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (trigger & IRQ_TYPE_EDGE_BOTH)
+ irq_set_handler_locked(d, handle_edge_irq);
+ else
+ irq_set_handler_locked(d, handle_level_irq);
+
+ raw_spin_lock_irqsave(&sfp->lock, flags);
+ irq_type |= readl_relaxed(base + irq_reg->is_reg_base) & ~mask;
+ writel_relaxed(irq_type, base + irq_reg->is_reg_base);
+
+ edge_both |= readl_relaxed(base + irq_reg->ibe_reg_base) & ~mask;
+ writel_relaxed(edge_both, base + irq_reg->ibe_reg_base);
+
+ polarity |= readl_relaxed(base + irq_reg->iev_reg_base) & ~mask;
+ writel_relaxed(polarity, base + irq_reg->iev_reg_base);
+ raw_spin_unlock_irqrestore(&sfp->lock, flags);
+ return 0;
+}
+
+static irqreturn_t jh8100_gpio_wake_irq_handler(int irq, void *data)
+{
+ struct jh8100_pinctrl *sfp = data;
+
+ if (!sfp || irq != sfp->wakeup_irq)
+ return IRQ_NONE;
+
+ return IRQ_HANDLED;
+}
+
+static int jh8100_irq_set_wake(struct irq_data *d, unsigned int enable)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+ int ret = 0;
+
+ if (enable)
+ ret = enable_irq_wake(sfp->wakeup_irq);
+ else
+ ret = disable_irq_wake(sfp->wakeup_irq);
+ if (ret)
+ dev_err(sfp->dev, "failed to %s wake-up interrupt\n",
+ enable ? "enable" : "disable");
+
+ return ret;
+}
+
+static void jh8100_irq_print_chip(struct irq_data *d, struct seq_file *p)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_data(d);
+
+ seq_printf(p, sfp->gc.label);
+}
+
+static const struct irq_chip jh8100_irq_chip = {
+ .irq_ack = jh8100_irq_ack,
+ .irq_mask = jh8100_irq_mask,
+ .irq_mask_ack = jh8100_irq_mask_ack,
+ .irq_unmask = jh8100_irq_unmask,
+ .irq_set_type = jh8100_irq_set_type,
+ .irq_set_wake = jh8100_irq_set_wake,
+ .irq_print_chip = jh8100_irq_print_chip,
+ .flags = IRQCHIP_SET_TYPE_MASKED |
+ IRQCHIP_IMMUTABLE |
+ IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND |
+ IRQCHIP_MASK_ON_SUSPEND |
+ IRQCHIP_SKIP_SET_WAKE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static int jh8100_gpio_irq_setup(struct device *dev, struct jh8100_pinctrl *sfp)
+{
+ struct device_node *np = dev->of_node;
+ struct gpio_irq_chip *girq = &sfp->gc.irq;
+ struct gpio_desc *gpiod;
+ struct irq_desc *desc;
+ irq_hw_number_t hwirq;
+ int i, ret;
+ int dir;
+
+ if (!girq->domain) {
+ sfp->irq_domain = irq_domain_add_linear(np, sfp->gc.ngpio,
+ &irq_domain_simple_ops,
+ sfp);
+ } else {
+ sfp->irq_domain = girq->domain;
+ }
+
+ if (!sfp->irq_domain) {
+ dev_err(dev, "Couldn't allocate IRQ domain\n");
+ return -ENXIO;
+ }
+
+ for (i = 0; i < sfp->gc.ngpio; i++) {
+ int virq = irq_create_mapping(sfp->irq_domain, i);
+
+ irq_set_chip_and_handler(virq, &jh8100_irq_chip,
+ handle_edge_irq);
+ irq_set_chip_data(virq, &sfp->gc);
+ }
+
+ sfp->wakeup_gpio = of_get_named_gpio(np, "wakeup-gpios", 0);
+
+ if (gpio_is_valid(sfp->wakeup_gpio)) {
+ hwirq = pin_to_hwirq(sfp);
+ sfp->wakeup_irq = irq_find_mapping(sfp->irq_domain, hwirq);
+ desc = irq_to_desc(sfp->wakeup_irq);
+
+ gpiod = gpio_to_desc(sfp->wakeup_gpio);
+ if (!gpiod)
+ return -EINVAL;
+
+ dir = gpiod_get_direction(gpiod);
+ if (!dir) {
+ ret = gpiod_direction_input(gpiod);
+ if (ret) {
+ dev_err_probe(dev, ret,
+ "unable to set wakeup gpio %d as input\n",
+ sfp->wakeup_gpio);
+ return ret;
+ }
+ }
+ } else {
+ dev_err(dev, "invalid wakeup gpio: %d\n",
+ sfp->wakeup_gpio);
+ return sfp->wakeup_gpio;
+ }
+
+ if (!(desc->status_use_accessors & IRQ_NOREQUEST)) {
+ device_init_wakeup(dev, 1);
+ ret = devm_request_threaded_irq(dev, sfp->wakeup_irq, NULL,
+ jh8100_gpio_wake_irq_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING |
+ IRQF_ONESHOT |
+ IRQF_SHARED,
+ "wakeup-gpio", sfp);
+ if (ret) {
+ dev_err_probe(dev, ret, "unable to request wake IRQ %d\n",
+ sfp->wakeup_irq);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static void jh8100_gpio_irq_handler(struct irq_desc *desc)
+{
+ struct jh8100_pinctrl *sfp = jh8100_from_irq_desc(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct gpio_irq_chip *girq = &sfp->gc.irq;
+ unsigned long mis;
+ unsigned int pin;
+
+ chained_irq_enter(chip, desc);
+
+ mis = readl_relaxed(sfp->base + sfp->info->irq_reg->mis_reg_base);
+ for_each_set_bit(pin, &mis, sfp->info->mis_pin_num)
+ generic_handle_domain_irq(girq->domain, pin);
+
+ if (sfp->info->irq_reg->mis1_reg_base) {
+ mis = readl_relaxed(sfp->base + sfp->info->irq_reg->mis1_reg_base);
+ for_each_set_bit(pin, &mis, sfp->info->mis1_pin_num)
+ generic_handle_domain_irq(girq->domain, pin + 32);
+ }
+
+ chained_irq_exit(chip, desc);
+}
+
+static int jh8100_gpio_init_hw(struct gpio_chip *gc)
+{
+ struct jh8100_pinctrl *sfp = container_of(gc,
+ struct jh8100_pinctrl, gc);
+
+ /* mask all GPIO interrupts */
+ writel_relaxed(0U, sfp->base + sfp->info->irq_reg->ie_reg_base);
+ /* clear edge interrupt flags */
+ writel_relaxed(0U, sfp->base + sfp->info->irq_reg->ic_reg_base);
+ writel_relaxed(~0U, sfp->base + sfp->info->irq_reg->ic_reg_base);
+ if (sfp->info->irq_reg->ic1_reg_base) {
+ writel_relaxed(0U, sfp->base + sfp->info->irq_reg->ic1_reg_base);
+ writel_relaxed(~0U, sfp->base + sfp->info->irq_reg->ic1_reg_base);
+ }
+ /* enable GPIO interrupts */
+ writel_relaxed(1, sfp->base + sfp->info->irq_reg->ien_reg_base);
+
+ return 0;
+}
+
+static void jh8100_disable_clock(void *data)
+{
+ clk_disable_unprepare(data);
+}
+
+int jh8100_pinctrl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct gpio_irq_chip *girq;
+ const struct jh8100_pinctrl_domain_info *info;
+ struct jh8100_pinctrl *sfp;
+ struct pinctrl_desc *jh8100_pinctrl_desc;
+ struct reset_control *rst;
+ struct clk *clk;
+ int ret;
+
+ info = of_device_get_match_data(&pdev->dev);
+ if (!info)
+ return -ENODEV;
+
+ sfp = devm_kzalloc(dev, sizeof(*sfp), GFP_KERNEL);
+ if (!sfp)
+ return -ENOMEM;
+
+ sfp->base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(sfp->base))
+ return PTR_ERR(sfp->base);
+
+ clk = devm_clk_get_optional(dev, NULL);
+ if (IS_ERR(clk))
+ return dev_err_probe(dev, PTR_ERR(clk), "could not get clock\n");
+
+ rst = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(rst))
+ return dev_err_probe(dev, PTR_ERR(rst), "could not get reset control\n");
+
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not enable clock\n");
+
+ ret = devm_add_action_or_reset(dev, jh8100_disable_clock, clk);
+ if (ret)
+ return ret;
+
+ /*
+ * we don't want to assert reset and risk undoing pin muxing for the
+ * early boot serial console, but let's make sure the reset line is
+ * deasserted in case someone runs a really minimal bootloader.
+ */
+ ret = reset_control_deassert(rst);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not deassert reset\n");
+
+ jh8100_pinctrl_desc = devm_kzalloc(&pdev->dev,
+ sizeof(*jh8100_pinctrl_desc),
+ GFP_KERNEL);
+ if (!jh8100_pinctrl_desc)
+ return -ENOMEM;
+
+ jh8100_pinctrl_desc->name = dev_name(dev);
+ jh8100_pinctrl_desc->pins = info->pins;
+ jh8100_pinctrl_desc->npins = info->npins;
+ jh8100_pinctrl_desc->pctlops = &jh8100_pinctrl_ops;
+ jh8100_pinctrl_desc->pmxops = &jh8100_pinmux_ops;
+ jh8100_pinctrl_desc->confops = &jh8100_pinconf_ops;
+ jh8100_pinctrl_desc->owner = THIS_MODULE;
+
+ sfp->info = info;
+ sfp->dev = dev;
+ platform_set_drvdata(pdev, sfp);
+ sfp->gc.parent = dev;
+ raw_spin_lock_init(&sfp->lock);
+ mutex_init(&sfp->mutex);
+
+ ret = devm_pinctrl_register_and_init(dev,
+ jh8100_pinctrl_desc,
+ sfp, &sfp->pctl);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "could not register pinctrl driver\n");
+
+ sfp->gc.label = dev_name(dev);
+ sfp->gc.owner = THIS_MODULE;
+ sfp->gc.request = pinctrl_gpio_request;
+ sfp->gc.free = pinctrl_gpio_free;
+ sfp->gc.get_direction = jh8100_gpio_get_direction;
+ sfp->gc.direction_input = jh8100_gpio_direction_input;
+ sfp->gc.direction_output = jh8100_gpio_direction_output;
+ sfp->gc.get = jh8100_gpio_get;
+ sfp->gc.set = jh8100_gpio_set;
+ sfp->gc.set_config = gpiochip_generic_config;
+ sfp->gc.base = info->gc_base;
+ sfp->gc.ngpio = info->ngpios;
+
+ girq = &sfp->gc.irq;
+
+ if (info->irq_reg) {
+ gpio_irq_chip_set_chip(girq, &jh8100_irq_chip);
+ girq->parent_handler = jh8100_gpio_irq_handler;
+ girq->num_parents = 1;
+ girq->parents = devm_kcalloc(dev, girq->num_parents,
+ sizeof(*girq->parents),
+ GFP_KERNEL);
+ if (!girq->parents)
+ return -ENOMEM;
+ girq->default_type = IRQ_TYPE_NONE;
+ girq->handler = handle_bad_irq;
+ girq->init_hw = jh8100_gpio_init_hw;
+
+ ret = platform_get_irq(pdev, 0);
+ if (ret < 0)
+ return ret;
+ girq->parents[0] = ret;
+ }
+
+ ret = pinctrl_enable(sfp->pctl);
+ if (ret)
+ return ret;
+
+ if (sfp->gc.ngpio > 0) {
+ ret = devm_gpiochip_add_data(dev, &sfp->gc, sfp);
+ if (ret)
+ return dev_err_probe(dev, ret, "could not register gpiochip\n");
+
+ dev_info(dev, "StarFive JH8100 GPIO chip registered %d GPIOs\n", sfp->gc.ngpio);
+ }
+
+ if (of_property_read_bool(np, "wakeup-source")) {
+ ret = jh8100_gpio_irq_setup(dev, sfp);
+ if (ret) {
+ return dev_err_probe(dev, ret,
+ "failed to setup gpio irq wake\n");
+ }
+
+ ret = dev_pm_set_wake_irq(dev, sfp->wakeup_irq);
+ if (ret) {
+ return dev_err_probe(dev, ret,
+ "failed to enable gpio irq wake\n");
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(jh8100_pinctrl_probe);
+
+MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH8100 SoC");
+MODULE_AUTHOR("Alex Soo <yuklin.soo@xxxxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
new file mode 100644
index 000000000000..920cdd8b6376
--- /dev/null
+++ b/drivers/pinctrl/starfive/pinctrl-starfive-jh8100.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Pinctrl / GPIO driver for StarFive JH8100 SoC
+ *
+ * Copyright (C) 2023-2024 StarFive Technology Co., Ltd.
+ * Author: Alex Soo <yuklin.soo@xxxxxxxxxxxxxxxx>
+ *
+ */
+
+#ifndef __PINCTRL_STARFIVE_JH8100_H__
+#define __PINCTRL_STARFIVE_JH8100_H__
+
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+
+#define JH8100_SYS_E_DOMAIN_NAME "jh8100-sys-east"
+
+#define JH8100_SYS_E_REG_NUM 116
+
+#define JH8100_SYS_E_GPO_PDA_00_47_CFG 0x114
+
+struct jh8100_pinctrl {
+ struct device *dev;
+ struct gpio_chip gc;
+ struct pinctrl_gpio_range gpios;
+ raw_spinlock_t lock;
+ void __iomem *base;
+ struct pinctrl_dev *pctl;
+ /* register read/write mutex */
+ struct mutex mutex;
+ const struct jh8100_pinctrl_domain_info *info;
+ unsigned int jh8100_sys_east_regs[JH8100_SYS_E_REG_NUM];
+ /* wakeup */
+ int wakeup_gpio;
+ int wakeup_irq;
+ struct irq_domain *irq_domain;
+};
+
+struct jh8100_gpio_func_sel {
+ unsigned short offset;
+ unsigned char shift;
+ unsigned char max;
+};
+
+struct jh8100_gpio_irq_reg {
+ unsigned int is_reg_base;
+ unsigned int ic_reg_base;
+ unsigned int ic1_reg_base;
+ unsigned int ibe_reg_base;
+ unsigned int iev_reg_base;
+ unsigned int ie_reg_base;
+ unsigned int ris_reg_base;
+ unsigned int mis_reg_base;
+ unsigned int mis1_reg_base;
+ unsigned int ien_reg_base;
+};
+
+struct jh8100_pinctrl_domain_info {
+ const struct pinctrl_pin_desc *pins;
+ unsigned int npins;
+ unsigned int ngpios;
+ unsigned int gc_base;
+
+ const char *name;
+ unsigned int nregs;
+
+ /* gpio dout/doen/din/gpioinput register */
+ unsigned int dout_reg_base;
+ unsigned int dout_mask;
+ unsigned int doen_reg_base;
+ unsigned int doen_mask;
+ unsigned int gpi_reg_base;
+ unsigned int gpi_mask;
+ unsigned int gpioin_reg_base;
+
+ const struct jh8100_gpio_func_sel *func_sel;
+ const struct jh8100_gpio_irq_reg *irq_reg;
+
+ /* gpio chip */
+ unsigned int mis_pin_num;
+ unsigned int mis1_pin_num;
+};
+
+static inline irq_hw_number_t pin_to_hwirq(struct jh8100_pinctrl *sfp)
+{
+ return sfp->wakeup_gpio - sfp->info->gc_base;
+}
+
+int jh8100_pinctrl_probe(struct platform_device *pdev);
+void jh8100_set_gpiomux(struct jh8100_pinctrl *sfp, unsigned int pin,
+ unsigned int din, u32 dout, u32 doen);
+struct jh8100_pinctrl *jh8100_from_irq_desc(struct irq_desc *desc);
+
+#endif /* __PINCTRL_STARFIVE_JH8100_H__ */
--
2.43.0