pinctrl: starfive: Add StarFive JH7110 sys controller driver

Add pinctrl driver for StarFive JH7110 SoC sys pinctrl controller.
Co-developed-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Jianlong Huang <jianlong.huang@starfivetech.com>
Signed-off-by: Hal Feng <hal.feng@starfivetech.com>
Link: https://lore.kernel.org/r/20230209143702.44408-4-hal.feng@starfivetech.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

MAINTAINERS

@@ -19896,7 +19896,7 @@ M:	Jianlong Huang <jianlong.huang@starfivetech.com>
 L:	linux-gpio@vger.kernel.org
 S:	Maintained
 F:	Documentation/devicetree/bindings/pinctrl/starfive,jh71*.yaml
-F:	drivers/pinctrl/starfive/
+F:	drivers/pinctrl/starfive/pinctrl-starfive-jh71*
 F:	include/dt-bindings/pinctrl/pinctrl-starfive-jh7100.h
 F:	include/dt-bindings/pinctrl/starfive,jh7110-pinctrl.h
 

drivers/pinctrl/starfive/Kconfig

@@ -16,3 +16,24 @@ config PINCTRL_STARFIVE_JH7100
 	  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_JH7110
+	bool
+	select GENERIC_PINCTRL_GROUPS
+	select GENERIC_PINMUX_FUNCTIONS
+	select GENERIC_PINCONF
+	select GPIOLIB
+	select GPIOLIB_IRQCHIP
+	select OF_GPIO
+
+config PINCTRL_STARFIVE_JH7110_SYS
+	tristate "System pinctrl and GPIO driver for the StarFive JH7110 SoC"
+	depends on SOC_STARFIVE  || COMPILE_TEST
+	depends on OF
+	select PINCTRL_STARFIVE_JH7110
+	default SOC_STARFIVE
+	help
+	  Say yes here to support system pin control on the StarFive JH7110 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.

drivers/pinctrl/starfive/Makefile

 # SPDX-License-Identifier: GPL-2.0
 
 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

drivers/pinctrl/starfive/pinctrl-starfive-jh7110-sys.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC sys controller
+ *
+ * Copyright (C) 2022 Emil Renner Berthing <kernel@esmil.dk>
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.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/platform_device.h>
+#include <linux/reset.h>
+#include <linux/spinlock.h>
+
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+
+#include <dt-bindings/pinctrl/starfive,jh7110-pinctrl.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "pinctrl-starfive-jh7110.h"
+
+#define JH7110_SYS_NGPIO		64
+#define JH7110_SYS_GC_BASE		0
+
+/* registers */
+#define JH7110_SYS_DOEN			0x000
+#define JH7110_SYS_DOUT			0x040
+#define JH7110_SYS_GPI			0x080
+#define JH7110_SYS_GPIOIN		0x118
+
+#define JH7110_SYS_GPIOEN		0x0dc
+#define JH7110_SYS_GPIOIS0		0x0e0
+#define JH7110_SYS_GPIOIS1		0x0e4
+#define JH7110_SYS_GPIOIC0		0x0e8
+#define JH7110_SYS_GPIOIC1		0x0ec
+#define JH7110_SYS_GPIOIBE0		0x0f0
+#define JH7110_SYS_GPIOIBE1		0x0f4
+#define JH7110_SYS_GPIOIEV0		0x0f8
+#define JH7110_SYS_GPIOIEV1		0x0fc
+#define JH7110_SYS_GPIOIE0		0x100
+#define JH7110_SYS_GPIOIE1		0x104
+#define JH7110_SYS_GPIORIS0		0x108
+#define JH7110_SYS_GPIORIS1		0x10c
+#define JH7110_SYS_GPIOMIS0		0x110
+#define JH7110_SYS_GPIOMIS1		0x114
+
+#define JH7110_SYS_GPO_PDA_0_74_CFG	0x120
+#define JH7110_SYS_GPO_PDA_89_94_CFG	0x284
+
+static const struct pinctrl_pin_desc jh7110_sys_pins[] = {
+	PINCTRL_PIN(PAD_GPIO0,		"GPIO0"),
+	PINCTRL_PIN(PAD_GPIO1,		"GPIO1"),
+	PINCTRL_PIN(PAD_GPIO2,		"GPIO2"),
+	PINCTRL_PIN(PAD_GPIO3,		"GPIO3"),
+	PINCTRL_PIN(PAD_GPIO4,		"GPIO4"),
+	PINCTRL_PIN(PAD_GPIO5,		"GPIO5"),
+	PINCTRL_PIN(PAD_GPIO6,		"GPIO6"),
+	PINCTRL_PIN(PAD_GPIO7,		"GPIO7"),
+	PINCTRL_PIN(PAD_GPIO8,		"GPIO8"),
+	PINCTRL_PIN(PAD_GPIO9,		"GPIO9"),
+	PINCTRL_PIN(PAD_GPIO10,		"GPIO10"),
+	PINCTRL_PIN(PAD_GPIO11,		"GPIO11"),
+	PINCTRL_PIN(PAD_GPIO12,		"GPIO12"),
+	PINCTRL_PIN(PAD_GPIO13,		"GPIO13"),
+	PINCTRL_PIN(PAD_GPIO14,		"GPIO14"),
+	PINCTRL_PIN(PAD_GPIO15,		"GPIO15"),
+	PINCTRL_PIN(PAD_GPIO16,		"GPIO16"),
+	PINCTRL_PIN(PAD_GPIO17,		"GPIO17"),
+	PINCTRL_PIN(PAD_GPIO18,		"GPIO18"),
+	PINCTRL_PIN(PAD_GPIO19,		"GPIO19"),
+	PINCTRL_PIN(PAD_GPIO20,		"GPIO20"),
+	PINCTRL_PIN(PAD_GPIO21,		"GPIO21"),
+	PINCTRL_PIN(PAD_GPIO22,		"GPIO22"),
+	PINCTRL_PIN(PAD_GPIO23,		"GPIO23"),
+	PINCTRL_PIN(PAD_GPIO24,		"GPIO24"),
+	PINCTRL_PIN(PAD_GPIO25,		"GPIO25"),
+	PINCTRL_PIN(PAD_GPIO26,		"GPIO26"),
+	PINCTRL_PIN(PAD_GPIO27,		"GPIO27"),
+	PINCTRL_PIN(PAD_GPIO28,		"GPIO28"),
+	PINCTRL_PIN(PAD_GPIO29,		"GPIO29"),
+	PINCTRL_PIN(PAD_GPIO30,		"GPIO30"),
+	PINCTRL_PIN(PAD_GPIO31,		"GPIO31"),
+	PINCTRL_PIN(PAD_GPIO32,		"GPIO32"),
+	PINCTRL_PIN(PAD_GPIO33,		"GPIO33"),
+	PINCTRL_PIN(PAD_GPIO34,		"GPIO34"),
+	PINCTRL_PIN(PAD_GPIO35,		"GPIO35"),
+	PINCTRL_PIN(PAD_GPIO36,		"GPIO36"),
+	PINCTRL_PIN(PAD_GPIO37,		"GPIO37"),
+	PINCTRL_PIN(PAD_GPIO38,		"GPIO38"),
+	PINCTRL_PIN(PAD_GPIO39,		"GPIO39"),
+	PINCTRL_PIN(PAD_GPIO40,		"GPIO40"),
+	PINCTRL_PIN(PAD_GPIO41,		"GPIO41"),
+	PINCTRL_PIN(PAD_GPIO42,		"GPIO42"),
+	PINCTRL_PIN(PAD_GPIO43,		"GPIO43"),
+	PINCTRL_PIN(PAD_GPIO44,		"GPIO44"),
+	PINCTRL_PIN(PAD_GPIO45,		"GPIO45"),
+	PINCTRL_PIN(PAD_GPIO46,		"GPIO46"),
+	PINCTRL_PIN(PAD_GPIO47,		"GPIO47"),
+	PINCTRL_PIN(PAD_GPIO48,		"GPIO48"),
+	PINCTRL_PIN(PAD_GPIO49,		"GPIO49"),
+	PINCTRL_PIN(PAD_GPIO50,		"GPIO50"),
+	PINCTRL_PIN(PAD_GPIO51,		"GPIO51"),
+	PINCTRL_PIN(PAD_GPIO52,		"GPIO52"),
+	PINCTRL_PIN(PAD_GPIO53,		"GPIO53"),
+	PINCTRL_PIN(PAD_GPIO54,		"GPIO54"),
+	PINCTRL_PIN(PAD_GPIO55,		"GPIO55"),
+	PINCTRL_PIN(PAD_GPIO56,		"GPIO56"),
+	PINCTRL_PIN(PAD_GPIO57,		"GPIO57"),
+	PINCTRL_PIN(PAD_GPIO58,		"GPIO58"),
+	PINCTRL_PIN(PAD_GPIO59,		"GPIO59"),
+	PINCTRL_PIN(PAD_GPIO60,		"GPIO60"),
+	PINCTRL_PIN(PAD_GPIO61,		"GPIO61"),
+	PINCTRL_PIN(PAD_GPIO62,		"GPIO62"),
+	PINCTRL_PIN(PAD_GPIO63,		"GPIO63"),
+	PINCTRL_PIN(PAD_SD0_CLK,	"SD0_CLK"),
+	PINCTRL_PIN(PAD_SD0_CMD,	"SD0_CMD"),
+	PINCTRL_PIN(PAD_SD0_DATA0,	"SD0_DATA0"),
+	PINCTRL_PIN(PAD_SD0_DATA1,	"SD0_DATA1"),
+	PINCTRL_PIN(PAD_SD0_DATA2,	"SD0_DATA2"),
+	PINCTRL_PIN(PAD_SD0_DATA3,	"SD0_DATA3"),
+	PINCTRL_PIN(PAD_SD0_DATA4,	"SD0_DATA4"),
+	PINCTRL_PIN(PAD_SD0_DATA5,	"SD0_DATA5"),
+	PINCTRL_PIN(PAD_SD0_DATA6,	"SD0_DATA6"),
+	PINCTRL_PIN(PAD_SD0_DATA7,	"SD0_DATA7"),
+	PINCTRL_PIN(PAD_SD0_STRB,	"SD0_STRB"),
+	PINCTRL_PIN(PAD_GMAC1_MDC,	"GMAC1_MDC"),
+	PINCTRL_PIN(PAD_GMAC1_MDIO,	"GMAC1_MDIO"),
+	PINCTRL_PIN(PAD_GMAC1_RXD0,	"GMAC1_RXD0"),
+	PINCTRL_PIN(PAD_GMAC1_RXD1,	"GMAC1_RXD1"),
+	PINCTRL_PIN(PAD_GMAC1_RXD2,	"GMAC1_RXD2"),
+	PINCTRL_PIN(PAD_GMAC1_RXD3,	"GMAC1_RXD3"),
+	PINCTRL_PIN(PAD_GMAC1_RXDV,	"GMAC1_RXDV"),
+	PINCTRL_PIN(PAD_GMAC1_RXC,	"GMAC1_RXC"),
+	PINCTRL_PIN(PAD_GMAC1_TXD0,	"GMAC1_TXD0"),
+	PINCTRL_PIN(PAD_GMAC1_TXD1,	"GMAC1_TXD1"),
+	PINCTRL_PIN(PAD_GMAC1_TXD2,	"GMAC1_TXD2"),
+	PINCTRL_PIN(PAD_GMAC1_TXD3,	"GMAC1_TXD3"),
+	PINCTRL_PIN(PAD_GMAC1_TXEN,	"GMAC1_TXEN"),
+	PINCTRL_PIN(PAD_GMAC1_TXC,	"GMAC1_TXC"),
+	PINCTRL_PIN(PAD_QSPI_SCLK,	"QSPI_SCLK"),
+	PINCTRL_PIN(PAD_QSPI_CS0,	"QSPI_CS0"),
+	PINCTRL_PIN(PAD_QSPI_DATA0,	"QSPI_DATA0"),
+	PINCTRL_PIN(PAD_QSPI_DATA1,	"QSPI_DATA1"),
+	PINCTRL_PIN(PAD_QSPI_DATA2,	"QSPI_DATA2"),
+	PINCTRL_PIN(PAD_QSPI_DATA3,	"QSPI_DATA3"),
+};
+
+struct jh7110_func_sel {
+	u16 offset;
+	u8 shift;
+	u8 max;
+};
+
+static const struct jh7110_func_sel
+	jh7110_sys_func_sel[ARRAY_SIZE(jh7110_sys_pins)] = {
+	[PAD_GMAC1_RXC] = { 0x29c,  0, 1 },
+	[PAD_GPIO10]    = { 0x29c,  2, 3 },
+	[PAD_GPIO11]    = { 0x29c,  5, 3 },
+	[PAD_GPIO12]    = { 0x29c,  8, 3 },
+	[PAD_GPIO13]    = { 0x29c, 11, 3 },
+	[PAD_GPIO14]    = { 0x29c, 14, 3 },
+	[PAD_GPIO15]    = { 0x29c, 17, 3 },
+	[PAD_GPIO16]    = { 0x29c, 20, 3 },
+	[PAD_GPIO17]    = { 0x29c, 23, 3 },
+	[PAD_GPIO18]    = { 0x29c, 26, 3 },
+	[PAD_GPIO19]    = { 0x29c, 29, 3 },
+
+	[PAD_GPIO20]    = { 0x2a0,  0, 3 },
+	[PAD_GPIO21]    = { 0x2a0,  3, 3 },
+	[PAD_GPIO22]    = { 0x2a0,  6, 3 },
+	[PAD_GPIO23]    = { 0x2a0,  9, 3 },
+	[PAD_GPIO24]    = { 0x2a0, 12, 3 },
+	[PAD_GPIO25]    = { 0x2a0, 15, 3 },
+	[PAD_GPIO26]    = { 0x2a0, 18, 3 },
+	[PAD_GPIO27]    = { 0x2a0, 21, 3 },
+	[PAD_GPIO28]    = { 0x2a0, 24, 3 },
+	[PAD_GPIO29]    = { 0x2a0, 27, 3 },
+
+	[PAD_GPIO30]    = { 0x2a4,  0, 3 },
+	[PAD_GPIO31]    = { 0x2a4,  3, 3 },
+	[PAD_GPIO32]    = { 0x2a4,  6, 3 },
+	[PAD_GPIO33]    = { 0x2a4,  9, 3 },
+	[PAD_GPIO34]    = { 0x2a4, 12, 3 },
+	[PAD_GPIO35]    = { 0x2a4, 15, 3 },
+	[PAD_GPIO36]    = { 0x2a4, 17, 3 },
+	[PAD_GPIO37]    = { 0x2a4, 20, 3 },
+	[PAD_GPIO38]    = { 0x2a4, 23, 3 },
+	[PAD_GPIO39]    = { 0x2a4, 26, 3 },
+	[PAD_GPIO40]    = { 0x2a4, 29, 3 },
+
+	[PAD_GPIO41]    = { 0x2a8,  0, 3 },
+	[PAD_GPIO42]    = { 0x2a8,  3, 3 },
+	[PAD_GPIO43]    = { 0x2a8,  6, 3 },
+	[PAD_GPIO44]    = { 0x2a8,  9, 3 },
+	[PAD_GPIO45]    = { 0x2a8, 12, 3 },
+	[PAD_GPIO46]    = { 0x2a8, 15, 3 },
+	[PAD_GPIO47]    = { 0x2a8, 18, 3 },
+	[PAD_GPIO48]    = { 0x2a8, 21, 3 },
+	[PAD_GPIO49]    = { 0x2a8, 24, 3 },
+	[PAD_GPIO50]    = { 0x2a8, 27, 3 },
+	[PAD_GPIO51]    = { 0x2a8, 30, 3 },
+
+	[PAD_GPIO52]    = { 0x2ac,  0, 3 },
+	[PAD_GPIO53]    = { 0x2ac,  2, 3 },
+	[PAD_GPIO54]    = { 0x2ac,  4, 3 },
+	[PAD_GPIO55]    = { 0x2ac,  6, 3 },
+	[PAD_GPIO56]    = { 0x2ac,  9, 3 },
+	[PAD_GPIO57]    = { 0x2ac, 12, 3 },
+	[PAD_GPIO58]    = { 0x2ac, 15, 3 },
+	[PAD_GPIO59]    = { 0x2ac, 18, 3 },
+	[PAD_GPIO60]    = { 0x2ac, 21, 3 },
+	[PAD_GPIO61]    = { 0x2ac, 24, 3 },
+	[PAD_GPIO62]    = { 0x2ac, 27, 3 },
+	[PAD_GPIO63]    = { 0x2ac, 30, 3 },
+
+	[PAD_GPIO6]     = { 0x2b0,  0, 3 },
+	[PAD_GPIO7]     = { 0x2b0,  2, 3 },
+	[PAD_GPIO8]     = { 0x2b0,  5, 3 },
+	[PAD_GPIO9]     = { 0x2b0,  8, 3 },
+};
+
+struct jh7110_vin_group_sel {
+	u16 offset;
+	u8 shift;
+	u8 group;
+};
+
+static const struct jh7110_vin_group_sel
+	jh7110_sys_vin_group_sel[ARRAY_SIZE(jh7110_sys_pins)] = {
+	[PAD_GPIO6]     = { 0x2b4, 21, 0 },
+	[PAD_GPIO7]     = { 0x2b4, 18, 0 },
+	[PAD_GPIO8]     = { 0x2b4, 15, 0 },
+	[PAD_GPIO9]     = { 0x2b0, 11, 0 },
+	[PAD_GPIO10]    = { 0x2b0, 20, 0 },
+	[PAD_GPIO11]    = { 0x2b0, 23, 0 },
+	[PAD_GPIO12]    = { 0x2b0, 26, 0 },
+	[PAD_GPIO13]    = { 0x2b0, 29, 0 },
+	[PAD_GPIO14]    = { 0x2b4,  0, 0 },
+	[PAD_GPIO15]    = { 0x2b4,  3, 0 },
+	[PAD_GPIO16]    = { 0x2b4,  6, 0 },
+	[PAD_GPIO17]    = { 0x2b4,  9, 0 },
+	[PAD_GPIO18]    = { 0x2b4, 12, 0 },
+	[PAD_GPIO19]    = { 0x2b0, 14, 0 },
+	[PAD_GPIO20]    = { 0x2b0, 17, 0 },
+
+	[PAD_GPIO21]    = { 0x2b4, 21, 1 },
+	[PAD_GPIO22]    = { 0x2b4, 18, 1 },
+	[PAD_GPIO23]    = { 0x2b4, 15, 1 },
+	[PAD_GPIO24]    = { 0x2b0, 11, 1 },
+	[PAD_GPIO25]    = { 0x2b0, 20, 1 },
+	[PAD_GPIO26]    = { 0x2b0, 23, 1 },
+	[PAD_GPIO27]    = { 0x2b0, 26, 1 },
+	[PAD_GPIO28]    = { 0x2b0, 29, 1 },
+	[PAD_GPIO29]    = { 0x2b4,  0, 1 },
+	[PAD_GPIO30]    = { 0x2b4,  3, 1 },
+	[PAD_GPIO31]    = { 0x2b4,  6, 1 },
+	[PAD_GPIO32]    = { 0x2b4,  9, 1 },
+	[PAD_GPIO33]    = { 0x2b4, 12, 1 },
+	[PAD_GPIO34]    = { 0x2b0, 14, 1 },
+	[PAD_GPIO35]    = { 0x2b0, 17, 1 },
+
+	[PAD_GPIO36]    = { 0x2b4, 21, 2 },
+	[PAD_GPIO37]    = { 0x2b4, 18, 2 },
+	[PAD_GPIO38]    = { 0x2b4, 15, 2 },
+	[PAD_GPIO39]    = { 0x2b0, 11, 2 },
+	[PAD_GPIO40]    = { 0x2b0, 20, 2 },
+	[PAD_GPIO41]    = { 0x2b0, 23, 2 },
+	[PAD_GPIO42]    = { 0x2b0, 26, 2 },
+	[PAD_GPIO43]    = { 0x2b0, 29, 2 },
+	[PAD_GPIO44]    = { 0x2b4,  0, 2 },
+	[PAD_GPIO45]    = { 0x2b4,  3, 2 },
+	[PAD_GPIO46]    = { 0x2b4,  6, 2 },
+	[PAD_GPIO47]    = { 0x2b4,  9, 2 },
+	[PAD_GPIO48]    = { 0x2b4, 12, 2 },
+	[PAD_GPIO49]    = { 0x2b0, 14, 2 },
+	[PAD_GPIO50]    = { 0x2b0, 17, 2 },
+};
+
+static void jh7110_set_function(struct jh7110_pinctrl *sfp,
+				unsigned int pin, u32 func)
+{
+	const struct jh7110_func_sel *fs = &jh7110_sys_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 void jh7110_set_vin_group(struct jh7110_pinctrl *sfp,
+				 unsigned int pin)
+{
+	const struct jh7110_vin_group_sel *gs = &jh7110_sys_vin_group_sel[pin];
+	unsigned long flags;
+	void __iomem *reg;
+	u32 mask;
+	u32 grp;
+
+	if (!gs->offset)
+		return;
+
+	reg = sfp->base + gs->offset;
+	grp = gs->group << gs->shift;
+	mask = 0x3U << gs->shift;
+
+	raw_spin_lock_irqsave(&sfp->lock, flags);
+	grp |= readl_relaxed(reg) & ~mask;
+	writel_relaxed(grp, reg);
+	raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+
+static int jh7110_sys_set_one_pin_mux(struct jh7110_pinctrl *sfp,
+				      unsigned int pin,
+				      unsigned int din, u32 dout,
+				      u32 doen, u32 func)
+{
+	if (pin < sfp->gc.ngpio && func == 0)
+		jh7110_set_gpiomux(sfp, pin, din, dout, doen);
+
+	jh7110_set_function(sfp, pin, func);
+
+	if (pin < sfp->gc.ngpio && func == 2)
+		jh7110_set_vin_group(sfp, pin);
+
+	return 0;
+}
+
+static int jh7110_sys_get_padcfg_base(struct jh7110_pinctrl *sfp,
+				      unsigned int pin)
+{
+	if (pin < PAD_GMAC1_MDC)
+		return JH7110_SYS_GPO_PDA_0_74_CFG;
+	else if (pin > PAD_GMAC1_TXC && pin <= PAD_QSPI_DATA3)
+		return JH7110_SYS_GPO_PDA_89_94_CFG;
+	else
+		return -1;
+}
+
+static void jh7110_sys_irq_handler(struct irq_desc *desc)
+{
+	struct jh7110_pinctrl *sfp = jh7110_from_irq_desc(desc);
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	unsigned long mis;
+	unsigned int pin;
+
+	chained_irq_enter(chip, desc);
+
+	mis = readl_relaxed(sfp->base + JH7110_SYS_GPIOMIS0);
+	for_each_set_bit(pin, &mis, 32)
+		generic_handle_domain_irq(sfp->gc.irq.domain, pin);
+
+	mis = readl_relaxed(sfp->base + JH7110_SYS_GPIOMIS1);
+	for_each_set_bit(pin, &mis, 32)
+		generic_handle_domain_irq(sfp->gc.irq.domain, pin + 32);
+
+	chained_irq_exit(chip, desc);
+}
+
+static int jh7110_sys_init_hw(struct gpio_chip *gc)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+
+	/* mask all GPIO interrupts */
+	writel(0U, sfp->base + JH7110_SYS_GPIOIE0);
+	writel(0U, sfp->base + JH7110_SYS_GPIOIE1);
+	/* clear edge interrupt flags */
+	writel(~0U, sfp->base + JH7110_SYS_GPIOIC0);
+	writel(~0U, sfp->base + JH7110_SYS_GPIOIC1);
+	/* enable GPIO interrupts */
+	writel(1U, sfp->base + JH7110_SYS_GPIOEN);
+	return 0;
+}
+
+static const struct jh7110_gpio_irq_reg jh7110_sys_irq_reg = {
+	.is_reg_base	= JH7110_SYS_GPIOIS0,
+	.ic_reg_base	= JH7110_SYS_GPIOIC0,
+	.ibe_reg_base	= JH7110_SYS_GPIOIBE0,
+	.iev_reg_base	= JH7110_SYS_GPIOIEV0,
+	.ie_reg_base	= JH7110_SYS_GPIOIE0,
+	.ris_reg_base	= JH7110_SYS_GPIORIS0,
+	.mis_reg_base	= JH7110_SYS_GPIOMIS0,
+};
+
+static const struct jh7110_pinctrl_soc_info jh7110_sys_pinctrl_info = {
+	.pins		= jh7110_sys_pins,
+	.npins		= ARRAY_SIZE(jh7110_sys_pins),
+	.ngpios		= JH7110_SYS_NGPIO,
+	.gc_base	= JH7110_SYS_GC_BASE,
+	.dout_reg_base	= JH7110_SYS_DOUT,
+	.dout_mask	= GENMASK(6, 0),
+	.doen_reg_base	= JH7110_SYS_DOEN,
+	.doen_mask	= GENMASK(5, 0),
+	.gpi_reg_base	= JH7110_SYS_GPI,
+	.gpi_mask	= GENMASK(6, 0),
+	.gpioin_reg_base	   = JH7110_SYS_GPIOIN,
+	.irq_reg		   = &jh7110_sys_irq_reg,
+	.jh7110_set_one_pin_mux  = jh7110_sys_set_one_pin_mux,
+	.jh7110_get_padcfg_base  = jh7110_sys_get_padcfg_base,
+	.jh7110_gpio_irq_handler = jh7110_sys_irq_handler,
+	.jh7110_gpio_init_hw	 = jh7110_sys_init_hw,
+};
+
+static const struct of_device_id jh7110_sys_pinctrl_of_match[] = {
+	{
+		.compatible = "starfive,jh7110-sys-pinctrl",
+		.data = &jh7110_sys_pinctrl_info,
+	},
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, jh7110_sys_pinctrl_of_match);
+
+static struct platform_driver jh7110_sys_pinctrl_driver = {
+	.probe = jh7110_pinctrl_probe,
+	.driver = {
+		.name = "starfive-jh7110-sys-pinctrl",
+		.of_match_table = jh7110_sys_pinctrl_of_match,
+	},
+};
+module_platform_driver(jh7110_sys_pinctrl_driver);
+
+MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC sys controller");
+MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>");
+MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
+MODULE_LICENSE("GPL");

drivers/pinctrl/starfive/pinctrl-starfive-jh7110.c

+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC
+ *
+ * Copyright (C) 2022 Emil Renner Berthing <kernel@esmil.dk>
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#include <linux/bits.h>
+#include <linux/clk.h>
+#include <linux/gpio/driver.h>
+#include <linux/io.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/platform_device.h>
+#include <linux/reset.h>
+#include <linux/seq_file.h>
+#include <linux/spinlock.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,jh7110-pinctrl.h>
+
+#include "../core.h"
+#include "../pinctrl-utils.h"
+#include "../pinmux.h"
+#include "../pinconf.h"
+#include "pinctrl-starfive-jh7110.h"
+
+/* pad control bits */
+#define JH7110_PADCFG_POS	BIT(7)
+#define JH7110_PADCFG_SMT	BIT(6)
+#define JH7110_PADCFG_SLEW	BIT(5)
+#define JH7110_PADCFG_PD	BIT(4)
+#define JH7110_PADCFG_PU	BIT(3)
+#define JH7110_PADCFG_BIAS	(JH7110_PADCFG_PD | JH7110_PADCFG_PU)
+#define JH7110_PADCFG_DS_MASK	GENMASK(2, 1)
+#define JH7110_PADCFG_DS_2MA	(0U << 1)
+#define JH7110_PADCFG_DS_4MA	BIT(1)
+#define JH7110_PADCFG_DS_8MA	(2U << 1)
+#define JH7110_PADCFG_DS_12MA	(3U << 1)
+#define JH7110_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 jh7110_pinmux_din(u32 v)
+{
+	return (v & GENMASK(31, 24)) >> 24;
+}
+
+static u32 jh7110_pinmux_dout(u32 v)
+{
+	return (v & GENMASK(23, 16)) >> 16;
+}
+
+static u32 jh7110_pinmux_doen(u32 v)
+{
+	return (v & GENMASK(15, 10)) >> 10;
+}
+
+static u32 jh7110_pinmux_function(u32 v)
+{
+	return (v & GENMASK(9, 8)) >> 8;
+}
+
+static unsigned int jh7110_pinmux_pin(u32 v)
+{
+	return v & GENMASK(7, 0);
+}
+
+static struct jh7110_pinctrl *jh7110_from_irq_data(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	return container_of(gc, struct jh7110_pinctrl, gc);
+}
+
+struct jh7110_pinctrl *jh7110_from_irq_desc(struct irq_desc *desc)
+{
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+
+	return container_of(gc, struct jh7110_pinctrl, gc);
+}
+EXPORT_SYMBOL_GPL(jh7110_from_irq_desc);
+
+#ifdef CONFIG_DEBUG_FS
+static void jh7110_pin_dbg_show(struct pinctrl_dev *pctldev,
+				struct seq_file *s, unsigned int pin)
+{
+	struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+	const struct jh7110_pinctrl_soc_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 jh7110_pin_dbg_show NULL
+#endif
+
+static int jh7110_dt_node_to_map(struct pinctrl_dev *pctldev,
+				 struct device_node *np,
+				 struct pinctrl_map **maps,
+				 unsigned int *num_maps)
+{
+	struct jh7110_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] = jh7110_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 jh7110_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	  = jh7110_pin_dbg_show,
+	.dt_node_to_map	  = jh7110_dt_node_to_map,
+	.dt_free_map	  = pinctrl_utils_free_map,
+};
+
+void jh7110_set_gpiomux(struct jh7110_pinctrl *sfp, unsigned int pin,
+			unsigned int din, u32 dout, u32 doen)
+{
+	const struct jh7110_pinctrl_soc_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;
+	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) {
+		ival |= readl_relaxed(reg_din) & ~imask;
+		writel_relaxed(ival, reg_din);
+	}
+	raw_spin_unlock_irqrestore(&sfp->lock, flags);
+}
+EXPORT_SYMBOL_GPL(jh7110_set_gpiomux);
+
+static int jh7110_set_mux(struct pinctrl_dev *pctldev,
+			  unsigned int fsel, unsigned int gsel)
+{
+	struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+	const struct jh7110_pinctrl_soc_info *info = sfp->info;
+	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->num_pins; i++) {
+		u32 v = pinmux[i];
+
+		if (info->jh7110_set_one_pin_mux)
+			info->jh7110_set_one_pin_mux(sfp,
+					jh7110_pinmux_pin(v),
+					jh7110_pinmux_din(v),
+					jh7110_pinmux_dout(v),
+					jh7110_pinmux_doen(v),
+					jh7110_pinmux_function(v));
+	}
+
+	return 0;
+}
+
+static const struct pinmux_ops jh7110_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	     = jh7110_set_mux,
+	.strict		     = true,
+};
+
+static const u8 jh7110_drive_strength_mA[4] = { 2, 4, 8, 12 };
+
+static u32 jh7110_padcfg_ds_to_mA(u32 padcfg)
+{
+	return jh7110_drive_strength_mA[(padcfg >> 1) & 3U];
+}
+
+static u32 jh7110_padcfg_ds_from_mA(u32 v)
+{
+	int i;
+
+	for (i = 0; i < 3; i++) {
+		if (v <= jh7110_drive_strength_mA[i])
+			break;
+	}
+	return i << 1;
+}
+
+static void jh7110_padcfg_rmw(struct jh7110_pinctrl *sfp,
+			      unsigned int pin, u32 mask, u32 value)
+{
+	const struct jh7110_pinctrl_soc_info *info = sfp->info;
+	void __iomem *reg;
+	unsigned long flags;
+	int padcfg_base;
+
+	if (!info->jh7110_get_padcfg_base)
+		return;
+
+	padcfg_base = info->jh7110_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 jh7110_pinconf_get(struct pinctrl_dev *pctldev,
+			      unsigned int pin, unsigned long *config)
+{
+	struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+	const struct jh7110_pinctrl_soc_info *info = sfp->info;
+	int param = pinconf_to_config_param(*config);
+	u32 padcfg, arg;
+	bool enabled;
+	int padcfg_base;
+
+	if (!info->jh7110_get_padcfg_base)
+		return 0;
+
+	padcfg_base = info->jh7110_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 & JH7110_PADCFG_BIAS);
+		arg = 0;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		enabled = padcfg & JH7110_PADCFG_PD;
+		arg = 1;
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		enabled = padcfg & JH7110_PADCFG_PU;
+		arg = 1;
+		break;
+	case PIN_CONFIG_DRIVE_STRENGTH:
+		enabled = true;
+		arg = jh7110_padcfg_ds_to_mA(padcfg);
+		break;
+	case PIN_CONFIG_INPUT_ENABLE:
+		enabled = padcfg & JH7110_PADCFG_IE;
+		arg = enabled;
+		break;
+	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+		enabled = padcfg & JH7110_PADCFG_SMT;
+		arg = enabled;
+		break;
+	case PIN_CONFIG_SLEW_RATE:
+		enabled = true;
+		arg = !!(padcfg & JH7110_PADCFG_SLEW);
+		break;
+	default:
+		return -ENOTSUPP;
+	}
+
+	*config = pinconf_to_config_packed(param, arg);
+	return enabled ? 0 : -EINVAL;
+}
+
+static int jh7110_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 jh7110_pinconf_get(pctldev, group->pins[0], config);
+}
+
+static int jh7110_pinconf_group_set(struct pinctrl_dev *pctldev,
+				    unsigned int gsel,
+				    unsigned long *configs,
+				    unsigned int num_configs)
+{
+	struct jh7110_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 |= JH7110_PADCFG_BIAS;
+			value &= ~JH7110_PADCFG_BIAS;
+			break;
+		case PIN_CONFIG_BIAS_PULL_DOWN:
+			if (arg == 0)
+				return -ENOTSUPP;
+			mask |= JH7110_PADCFG_BIAS;
+			value = (value & ~JH7110_PADCFG_BIAS) | JH7110_PADCFG_PD;
+			break;
+		case PIN_CONFIG_BIAS_PULL_UP:
+			if (arg == 0)
+				return -ENOTSUPP;
+			mask |= JH7110_PADCFG_BIAS;
+			value = (value & ~JH7110_PADCFG_BIAS) | JH7110_PADCFG_PU;
+			break;
+		case PIN_CONFIG_DRIVE_STRENGTH:
+			mask |= JH7110_PADCFG_DS_MASK;
+			value = (value & ~JH7110_PADCFG_DS_MASK) |
+				jh7110_padcfg_ds_from_mA(arg);
+			break;
+		case PIN_CONFIG_INPUT_ENABLE:
+			mask |= JH7110_PADCFG_IE;
+			if (arg)
+				value |= JH7110_PADCFG_IE;
+			else
+				value &= ~JH7110_PADCFG_IE;
+			break;
+		case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+			mask |= JH7110_PADCFG_SMT;
+			if (arg)
+				value |= JH7110_PADCFG_SMT;
+			else
+				value &= ~JH7110_PADCFG_SMT;
+			break;
+		case PIN_CONFIG_SLEW_RATE:
+			mask |= JH7110_PADCFG_SLEW;
+			if (arg)
+				value |= JH7110_PADCFG_SLEW;
+			else
+				value &= ~JH7110_PADCFG_SLEW;
+			break;
+		default:
+			return -ENOTSUPP;
+		}
+	}
+
+	for (i = 0; i < group->num_pins; i++)
+		jh7110_padcfg_rmw(sfp, group->pins[i], mask, value);
+
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void jh7110_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+				    struct seq_file *s, unsigned int pin)
+{
+	struct jh7110_pinctrl *sfp = pinctrl_dev_get_drvdata(pctldev);
+	const struct jh7110_pinctrl_soc_info *info = sfp->info;
+	u32 value;
+	int padcfg_base;
+
+	if (!info->jh7110_get_padcfg_base)
+		return;
+
+	padcfg_base = info->jh7110_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 jh7110_pinconf_dbg_show NULL
+#endif
+
+static const struct pinconf_ops jh7110_pinconf_ops = {
+	.pin_config_get		= jh7110_pinconf_get,
+	.pin_config_group_get	= jh7110_pinconf_group_get,
+	.pin_config_group_set	= jh7110_pinconf_group_set,
+	.pin_config_dbg_show	= jh7110_pinconf_dbg_show,
+	.is_generic		= true,
+};
+
+static int jh7110_gpio_request(struct gpio_chip *gc, unsigned int gpio)
+{
+	return pinctrl_gpio_request(gc->base + gpio);
+}
+
+static void jh7110_gpio_free(struct gpio_chip *gc, unsigned int gpio)
+{
+	pinctrl_gpio_free(gc->base + gpio);
+}
+
+static int jh7110_gpio_get_direction(struct gpio_chip *gc,
+				     unsigned int gpio)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+	const struct jh7110_pinctrl_soc_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 jh7110_gpio_direction_input(struct gpio_chip *gc,
+				       unsigned int gpio)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+	const struct jh7110_pinctrl_soc_info *info = sfp->info;
+
+	/* enable input and schmitt trigger */
+	jh7110_padcfg_rmw(sfp, gpio,
+			  JH7110_PADCFG_IE | JH7110_PADCFG_SMT,
+			  JH7110_PADCFG_IE | JH7110_PADCFG_SMT);
+
+	if (info->jh7110_set_one_pin_mux)
+		info->jh7110_set_one_pin_mux(sfp, gpio,
+				GPI_NONE, GPOUT_LOW, GPOEN_DISABLE, 0);
+
+	return 0;
+}
+
+static int jh7110_gpio_direction_output(struct gpio_chip *gc,
+					unsigned int gpio, int value)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+	const struct jh7110_pinctrl_soc_info *info = sfp->info;
+
+	if (info->jh7110_set_one_pin_mux)
+		info->jh7110_set_one_pin_mux(sfp, gpio,
+				GPI_NONE, value ? GPOUT_HIGH : GPOUT_LOW,
+				GPOEN_ENABLE, 0);
+
+	/* disable input, schmitt trigger and bias */
+	jh7110_padcfg_rmw(sfp, gpio,
+			  JH7110_PADCFG_IE | JH7110_PADCFG_SMT |
+			  JH7110_PADCFG_BIAS, 0);
+	return 0;
+}
+
+static int jh7110_gpio_get(struct gpio_chip *gc, unsigned int gpio)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+	const struct jh7110_pinctrl_soc_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 jh7110_gpio_set(struct gpio_chip *gc,
+			    unsigned int gpio, int value)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+	const struct jh7110_pinctrl_soc_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 int jh7110_gpio_set_config(struct gpio_chip *gc,
+				  unsigned int gpio, unsigned long config)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+	u32 arg = pinconf_to_config_argument(config);
+	u32 value;
+	u32 mask;
+
+	switch (pinconf_to_config_param(config)) {
+	case PIN_CONFIG_BIAS_DISABLE:
+		mask  = JH7110_PADCFG_BIAS;
+		value = 0;
+		break;
+	case PIN_CONFIG_BIAS_PULL_DOWN:
+		if (arg == 0)
+			return -ENOTSUPP;
+		mask  = JH7110_PADCFG_BIAS;
+		value = JH7110_PADCFG_PD;
+		break;
+	case PIN_CONFIG_BIAS_PULL_UP:
+		if (arg == 0)
+			return -ENOTSUPP;
+		mask  = JH7110_PADCFG_BIAS;
+		value = JH7110_PADCFG_PU;
+		break;
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		return 0;
+	case PIN_CONFIG_INPUT_ENABLE:
+		mask  = JH7110_PADCFG_IE;
+		value = arg ? JH7110_PADCFG_IE : 0;
+		break;
+	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+		mask  = JH7110_PADCFG_SMT;
+		value = arg ? JH7110_PADCFG_SMT : 0;
+		break;
+	default:
+		return -ENOTSUPP;
+	}
+
+	jh7110_padcfg_rmw(sfp, gpio, mask, value);
+	return 0;
+}
+
+static int jh7110_gpio_add_pin_ranges(struct gpio_chip *gc)
+{
+	struct jh7110_pinctrl *sfp = container_of(gc,
+			struct jh7110_pinctrl, gc);
+
+	sfp->gpios.name = sfp->gc.label;
+	sfp->gpios.base = sfp->gc.base;
+	sfp->gpios.pin_base = 0;
+	sfp->gpios.npins = sfp->gc.ngpio;
+	sfp->gpios.gc = &sfp->gc;
+	pinctrl_add_gpio_range(sfp->pctl, &sfp->gpios);
+	return 0;
+}
+
+static void jh7110_irq_ack(struct irq_data *d)
+{
+	struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+	const struct jh7110_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 jh7110_irq_mask(struct irq_data *d)
+{
+	struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+	const struct jh7110_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 jh7110_irq_mask_ack(struct irq_data *d)
+{
+	struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+	const struct jh7110_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 jh7110_irq_unmask(struct irq_data *d)
+{
+	struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+	const struct jh7110_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 jh7110_irq_set_type(struct irq_data *d, unsigned int trigger)
+{
+	struct jh7110_pinctrl *sfp = jh7110_from_irq_data(d);
+	const struct jh7110_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 struct irq_chip jh7110_irq_chip = {
+	.irq_ack      = jh7110_irq_ack,
+	.irq_mask     = jh7110_irq_mask,
+	.irq_mask_ack = jh7110_irq_mask_ack,
+	.irq_unmask   = jh7110_irq_unmask,
+	.irq_set_type = jh7110_irq_set_type,
+	.flags	      = IRQCHIP_IMMUTABLE | IRQCHIP_SET_TYPE_MASKED,
+	GPIOCHIP_IRQ_RESOURCE_HELPERS,
+};
+
+static void jh7110_disable_clock(void *data)
+{
+	clk_disable_unprepare(data);
+}
+
+int jh7110_pinctrl_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct jh7110_pinctrl_soc_info *info;
+	struct jh7110_pinctrl *sfp;
+	struct pinctrl_desc *jh7110_pinctrl_desc;
+	struct reset_control *rst;
+	struct clk *clk;
+	int ret;
+
+	info = of_device_get_match_data(&pdev->dev);
+	if (!info)
+		return -ENODEV;
+
+	if (!info->pins || !info->npins) {
+		dev_err(dev, "wrong pinctrl info\n");
+		return -EINVAL;
+	}
+
+	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\n");
+
+	/*
+	 * 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");
+
+	if (clk) {
+		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, jh7110_disable_clock, clk);
+		if (ret)
+			return ret;
+	}
+
+	jh7110_pinctrl_desc = devm_kzalloc(&pdev->dev,
+					   sizeof(*jh7110_pinctrl_desc),
+					   GFP_KERNEL);
+	if (!jh7110_pinctrl_desc)
+		return -ENOMEM;
+
+	jh7110_pinctrl_desc->name = dev_name(dev);
+	jh7110_pinctrl_desc->pins = info->pins;
+	jh7110_pinctrl_desc->npins = info->npins;
+	jh7110_pinctrl_desc->pctlops = &jh7110_pinctrl_ops;
+	jh7110_pinctrl_desc->pmxops = &jh7110_pinmux_ops;
+	jh7110_pinctrl_desc->confops = &jh7110_pinconf_ops;
+	jh7110_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,
+					     jh7110_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 = jh7110_gpio_request;
+	sfp->gc.free = jh7110_gpio_free;
+	sfp->gc.get_direction = jh7110_gpio_get_direction;
+	sfp->gc.direction_input = jh7110_gpio_direction_input;
+	sfp->gc.direction_output = jh7110_gpio_direction_output;
+	sfp->gc.get = jh7110_gpio_get;
+	sfp->gc.set = jh7110_gpio_set;
+	sfp->gc.set_config = jh7110_gpio_set_config;
+	sfp->gc.add_pin_ranges = jh7110_gpio_add_pin_ranges;
+	sfp->gc.base = info->gc_base;
+	sfp->gc.ngpio = info->ngpios;
+
+	jh7110_irq_chip.name = sfp->gc.label;
+	gpio_irq_chip_set_chip(&sfp->gc.irq, &jh7110_irq_chip);
+	sfp->gc.irq.parent_handler = info->jh7110_gpio_irq_handler;
+	sfp->gc.irq.num_parents = 1;
+	sfp->gc.irq.parents = devm_kcalloc(dev, sfp->gc.irq.num_parents,
+					   sizeof(*sfp->gc.irq.parents),
+					   GFP_KERNEL);
+	if (!sfp->gc.irq.parents)
+		return -ENOMEM;
+	sfp->gc.irq.default_type = IRQ_TYPE_NONE;
+	sfp->gc.irq.handler = handle_bad_irq;
+	sfp->gc.irq.init_hw = info->jh7110_gpio_init_hw;
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
+	sfp->gc.irq.parents[0] = ret;
+
+	ret = devm_gpiochip_add_data(dev, &sfp->gc, sfp);
+	if (ret)
+		return dev_err_probe(dev, ret, "could not register gpiochip\n");
+
+	irq_domain_set_pm_device(sfp->gc.irq.domain, dev);
+
+	dev_info(dev, "StarFive GPIO chip registered %d GPIOs\n", sfp->gc.ngpio);
+
+	return pinctrl_enable(sfp->pctl);
+}
+EXPORT_SYMBOL_GPL(jh7110_pinctrl_probe);
+
+MODULE_DESCRIPTION("Pinctrl driver for the StarFive JH7110 SoC");
+MODULE_AUTHOR("Emil Renner Berthing <kernel@esmil.dk>");
+MODULE_AUTHOR("Jianlong Huang <jianlong.huang@starfivetech.com>");
+MODULE_LICENSE("GPL");

drivers/pinctrl/starfive/pinctrl-starfive-jh7110.h

+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Pinctrl / GPIO driver for StarFive JH7110 SoC
+ *
+ * Copyright (C) 2022 StarFive Technology Co., Ltd.
+ */
+
+#ifndef __PINCTRL_STARFIVE_JH7110_H__
+#define __PINCTRL_STARFIVE_JH7110_H__
+
+#include <linux/pinctrl/pinconf-generic.h>
+#include <linux/pinctrl/pinmux.h>
+
+struct jh7110_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 jh7110_pinctrl_soc_info *info;
+};
+
+struct jh7110_gpio_irq_reg {
+	unsigned int is_reg_base;
+	unsigned int ic_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;
+};
+
+struct jh7110_pinctrl_soc_info {
+	const struct pinctrl_pin_desc *pins;
+	unsigned int npins;
+	unsigned int ngpios;
+	unsigned int gc_base;
+
+	/* 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 jh7110_gpio_irq_reg *irq_reg;
+
+	/* generic pinmux */
+	int (*jh7110_set_one_pin_mux)(struct jh7110_pinctrl *sfp,
+				      unsigned int pin,
+				      unsigned int din, u32 dout,
+				      u32 doen, u32 func);
+	/* gpio chip */
+	int (*jh7110_get_padcfg_base)(struct jh7110_pinctrl *sfp,
+				      unsigned int pin);
+	void (*jh7110_gpio_irq_handler)(struct irq_desc *desc);
+	int (*jh7110_gpio_init_hw)(struct gpio_chip *gc);
+};
+
+void jh7110_set_gpiomux(struct jh7110_pinctrl *sfp, unsigned int pin,
+			unsigned int din, u32 dout, u32 doen);
+int jh7110_pinctrl_probe(struct platform_device *pdev);
+struct jh7110_pinctrl *jh7110_from_irq_desc(struct irq_desc *desc);
+
+#endif /* __PINCTRL_STARFIVE_JH7110_H__ */