drivers/pinctrl/sunxi/pinctrl-sunxi.h - linux - Git at Google

 /*
  * Allwinner A1X SoCs pinctrl driver.
  *
  * Copyright (C) 2012 Maxime Ripard
  *
  * Maxime Ripard <maxime.ripard@free-electrons.com>
  *
  * This file is licensed under the terms of the GNU General Public
  * License version 2.  This program is licensed "as is" without any
  * warranty of any kind, whether express or implied.
  */

 #ifndef __PINCTRL_SUNXI_H
 #define __PINCTRL_SUNXI_H

 #include <linux/kernel.h>
 #include <linux/spinlock.h>

 #define PA_BASE	0
 #define PB_BASE	32
 #define PC_BASE	64
 #define PD_BASE	96
 #define PE_BASE	128
 #define PF_BASE	160
 #define PG_BASE	192
 #define PH_BASE	224
 #define PI_BASE	256
 #define PL_BASE	352
 #define PM_BASE	384
 #define PN_BASE	416

 #define SUNXI_PINCTRL_PIN(bank, pin)		\
 	PINCTRL_PIN(P ## bank ## _BASE + (pin), "P" #bank #pin)

 #define SUNXI_PIN_NAME_MAX_LEN	5

 #define BANK_MEM_SIZE		0x24
 #define MUX_REGS_OFFSET		0x0
 #define DATA_REGS_OFFSET	0x10
 #define DLEVEL_REGS_OFFSET	0x14
 #define PULL_REGS_OFFSET	0x1c

 #define PINS_PER_BANK		32
 #define MUX_PINS_PER_REG	8
 #define MUX_PINS_BITS		4
 #define MUX_PINS_MASK		0x0f
 #define DATA_PINS_PER_REG	32
 #define DATA_PINS_BITS		1
 #define DATA_PINS_MASK		0x01
 #define DLEVEL_PINS_PER_REG	16
 #define DLEVEL_PINS_BITS	2
 #define DLEVEL_PINS_MASK	0x03
 #define PULL_PINS_PER_REG	16
 #define PULL_PINS_BITS		2
 #define PULL_PINS_MASK		0x03

 #define IRQ_PER_BANK		32

 #define IRQ_CFG_REG		0x200
 #define IRQ_CFG_IRQ_PER_REG		8
 #define IRQ_CFG_IRQ_BITS		4
 #define IRQ_CFG_IRQ_MASK		((1 << IRQ_CFG_IRQ_BITS) - 1)
 #define IRQ_CTRL_REG		0x210
 #define IRQ_CTRL_IRQ_PER_REG		32
 #define IRQ_CTRL_IRQ_BITS		1
 #define IRQ_CTRL_IRQ_MASK		((1 << IRQ_CTRL_IRQ_BITS) - 1)
 #define IRQ_STATUS_REG		0x214
 #define IRQ_STATUS_IRQ_PER_REG		32
 #define IRQ_STATUS_IRQ_BITS		1
 #define IRQ_STATUS_IRQ_MASK		((1 << IRQ_STATUS_IRQ_BITS) - 1)

 #define IRQ_DEBOUNCE_REG	0x218

 #define IRQ_MEM_SIZE		0x20

 #define IRQ_EDGE_RISING		0x00
 #define IRQ_EDGE_FALLING	0x01
 #define IRQ_LEVEL_HIGH		0x02
 #define IRQ_LEVEL_LOW		0x03
 #define IRQ_EDGE_BOTH		0x04

 #define SUN4I_FUNC_INPUT	0
 #define SUN4I_FUNC_IRQ		6

 #define PINCTRL_SUN5I_A10S	BIT(1)
 #define PINCTRL_SUN5I_A13	BIT(2)
 #define PINCTRL_SUN5I_GR8	BIT(3)
 #define PINCTRL_SUN6I_A31	BIT(4)
 #define PINCTRL_SUN6I_A31S	BIT(5)
 #define PINCTRL_SUN4I_A10	BIT(6)
 #define PINCTRL_SUN7I_A20	BIT(7)
 #define PINCTRL_SUN8I_R40	BIT(8)

 struct sunxi_desc_function {
 	unsigned long	variant;
 	const char	*name;
 	u8		muxval;
 	u8		irqbank;
 	u8		irqnum;
 };

 struct sunxi_desc_pin {
 	struct pinctrl_pin_desc		pin;
 	unsigned long			variant;
 	struct sunxi_desc_function	*functions;
 };

 struct sunxi_pinctrl_desc {
 	const struct sunxi_desc_pin	*pins;
 	int				npins;
 	unsigned			pin_base;
 	unsigned			irq_banks;
 	const unsigned int		*irq_bank_map;
 	bool				irq_read_needs_mux;
 	bool				disable_strict_mode;
 };

 struct sunxi_pinctrl_function {
 	const char	*name;
 	const char	**groups;
 	unsigned	ngroups;
 };

 struct sunxi_pinctrl_group {
 	const char	*name;
 	unsigned	pin;
 };

 struct sunxi_pinctrl_regulator {
 	struct regulator	*regulator;
 	refcount_t		refcount;
 };

 struct sunxi_pinctrl {
 	void __iomem			*membase;
 	struct gpio_chip		*chip;
 	const struct sunxi_pinctrl_desc	*desc;
 	struct device			*dev;
 	struct sunxi_pinctrl_regulator	regulators[9];
 	struct irq_domain		*domain;
 	struct sunxi_pinctrl_function	*functions;
 	unsigned			nfunctions;
 	struct sunxi_pinctrl_group	*groups;
 	unsigned			ngroups;
 	int				*irq;
 	unsigned			*irq_array;
 	raw_spinlock_t			lock;
 	struct pinctrl_dev		*pctl_dev;
 	unsigned long			variant;
 };

 #define SUNXI_PIN(_pin, ...)					\
 	{							\
 		.pin = _pin,					\
 		.functions = (struct sunxi_desc_function[]){	\
 			__VA_ARGS__, { } },			\
 	}

 #define SUNXI_PIN_VARIANT(_pin, _variant, ...)			\
 	{							\
 		.pin = _pin,					\
 		.variant = _variant,				\
 		.functions = (struct sunxi_desc_function[]){	\
 			__VA_ARGS__, { } },			\
 	}

 #define SUNXI_FUNCTION(_val, _name)				\
 	{							\
 		.name = _name,					\
 		.muxval = _val,					\
 	}

 #define SUNXI_FUNCTION_VARIANT(_val, _name, _variant)		\
 	{							\
 		.name = _name,					\
 		.muxval = _val,					\
 		.variant = _variant,				\
 	}

 #define SUNXI_FUNCTION_IRQ(_val, _irq)				\
 	{							\
 		.name = "irq",					\
 		.muxval = _val,					\
 		.irqnum = _irq,					\
 	}

 #define SUNXI_FUNCTION_IRQ_BANK(_val, _bank, _irq)		\
 	{							\
 		.name = "irq",					\
 		.muxval = _val,					\
 		.irqbank = _bank,				\
 		.irqnum = _irq,					\
 	}

 /*
  * The sunXi PIO registers are organized as is:
  * 0x00 - 0x0c	Muxing values.
  *		8 pins per register, each pin having a 4bits value
  * 0x10		Pin values
  *		32 bits per register, each pin corresponding to one bit
  * 0x14 - 0x18	Drive level
  *		16 pins per register, each pin having a 2bits value
  * 0x1c - 0x20	Pull-Up values
  *		16 pins per register, each pin having a 2bits value
  *
  * This is for the first bank. Each bank will have the same layout,
  * with an offset being a multiple of 0x24.
  *
  * The following functions calculate from the pin number the register
  * and the bit offset that we should access.
  */
 static inline u32 sunxi_mux_reg(u16 pin)
 {
 	u8 bank = pin / PINS_PER_BANK;
 	u32 offset = bank * BANK_MEM_SIZE;
 	offset += MUX_REGS_OFFSET;
 	offset += pin % PINS_PER_BANK / MUX_PINS_PER_REG * 0x04;
 	return round_down(offset, 4);
 }

 static inline u32 sunxi_mux_offset(u16 pin)
 {
 	u32 pin_num = pin % MUX_PINS_PER_REG;
 	return pin_num * MUX_PINS_BITS;
 }

 static inline u32 sunxi_data_reg(u16 pin)
 {
 	u8 bank = pin / PINS_PER_BANK;
 	u32 offset = bank * BANK_MEM_SIZE;
 	offset += DATA_REGS_OFFSET;
 	offset += pin % PINS_PER_BANK / DATA_PINS_PER_REG * 0x04;
 	return round_down(offset, 4);
 }

 static inline u32 sunxi_data_offset(u16 pin)
 {
 	u32 pin_num = pin % DATA_PINS_PER_REG;
 	return pin_num * DATA_PINS_BITS;
 }

 static inline u32 sunxi_dlevel_reg(u16 pin)
 {
 	u8 bank = pin / PINS_PER_BANK;
 	u32 offset = bank * BANK_MEM_SIZE;
 	offset += DLEVEL_REGS_OFFSET;
 	offset += pin % PINS_PER_BANK / DLEVEL_PINS_PER_REG * 0x04;
 	return round_down(offset, 4);
 }

 static inline u32 sunxi_dlevel_offset(u16 pin)
 {
 	u32 pin_num = pin % DLEVEL_PINS_PER_REG;
 	return pin_num * DLEVEL_PINS_BITS;
 }

 static inline u32 sunxi_pull_reg(u16 pin)
 {
 	u8 bank = pin / PINS_PER_BANK;
 	u32 offset = bank * BANK_MEM_SIZE;
 	offset += PULL_REGS_OFFSET;
 	offset += pin % PINS_PER_BANK / PULL_PINS_PER_REG * 0x04;
 	return round_down(offset, 4);
 }

 static inline u32 sunxi_pull_offset(u16 pin)
 {
 	u32 pin_num = pin % PULL_PINS_PER_REG;
 	return pin_num * PULL_PINS_BITS;
 }

 static inline u32 sunxi_irq_hw_bank_num(const struct sunxi_pinctrl_desc *desc, u8 bank)
 {
 	if (!desc->irq_bank_map)
 		return bank;
 	else
 		return desc->irq_bank_map[bank];
 }

 static inline u32 sunxi_irq_cfg_reg(const struct sunxi_pinctrl_desc *desc,
 				    u16 irq)
 {
 	u8 bank = irq / IRQ_PER_BANK;
 	u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04;

 	return IRQ_CFG_REG +
 	       sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE + reg;
 }

 static inline u32 sunxi_irq_cfg_offset(u16 irq)
 {
 	u32 irq_num = irq % IRQ_CFG_IRQ_PER_REG;
 	return irq_num * IRQ_CFG_IRQ_BITS;
 }

 static inline u32 sunxi_irq_ctrl_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
 {
 	return IRQ_CTRL_REG + sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
 }

 static inline u32 sunxi_irq_ctrl_reg(const struct sunxi_pinctrl_desc *desc,
 				     u16 irq)
 {
 	u8 bank = irq / IRQ_PER_BANK;

 	return sunxi_irq_ctrl_reg_from_bank(desc, bank);
 }

 static inline u32 sunxi_irq_ctrl_offset(u16 irq)
 {
 	u32 irq_num = irq % IRQ_CTRL_IRQ_PER_REG;
 	return irq_num * IRQ_CTRL_IRQ_BITS;
 }

 static inline u32 sunxi_irq_debounce_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
 {
 	return IRQ_DEBOUNCE_REG +
 	       sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
 }

 static inline u32 sunxi_irq_status_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
 {
 	return IRQ_STATUS_REG +
 	       sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
 }

 static inline u32 sunxi_irq_status_reg(const struct sunxi_pinctrl_desc *desc,
 				       u16 irq)
 {
 	u8 bank = irq / IRQ_PER_BANK;

 	return sunxi_irq_status_reg_from_bank(desc, bank);
 }

 static inline u32 sunxi_irq_status_offset(u16 irq)
 {
 	u32 irq_num = irq % IRQ_STATUS_IRQ_PER_REG;
 	return irq_num * IRQ_STATUS_IRQ_BITS;
 }

 int sunxi_pinctrl_init_with_variant(struct platform_device *pdev,
 				    const struct sunxi_pinctrl_desc *desc,
 				    unsigned long variant);

 #define sunxi_pinctrl_init(_dev, _desc) \
 	sunxi_pinctrl_init_with_variant(_dev, _desc, 0)

 #endif /* __PINCTRL_SUNXI_H */
	/*
	* Allwinner A1X SoCs pinctrl driver.
	*
	* Copyright (C) 2012 Maxime Ripard
	*
	* Maxime Ripard <maxime.ripard@free-electrons.com>
	*
	* This file is licensed under the terms of the GNU General Public
	* License version 2. This program is licensed "as is" without any
	* warranty of any kind, whether express or implied.
	*/

	#ifndef __PINCTRL_SUNXI_H
	#define __PINCTRL_SUNXI_H

	#include <linux/kernel.h>
	#include <linux/spinlock.h>

	#define PA_BASE 0
	#define PB_BASE 32
	#define PC_BASE 64
	#define PD_BASE 96
	#define PE_BASE 128
	#define PF_BASE 160
	#define PG_BASE 192
	#define PH_BASE 224
	#define PI_BASE 256
	#define PL_BASE 352
	#define PM_BASE 384
	#define PN_BASE 416

	#define SUNXI_PINCTRL_PIN(bank, pin) \
	PINCTRL_PIN(P ## bank ## _BASE + (pin), "P" #bank #pin)

	#define SUNXI_PIN_NAME_MAX_LEN 5

	#define BANK_MEM_SIZE 0x24
	#define MUX_REGS_OFFSET 0x0
	#define DATA_REGS_OFFSET 0x10
	#define DLEVEL_REGS_OFFSET 0x14
	#define PULL_REGS_OFFSET 0x1c

	#define PINS_PER_BANK 32
	#define MUX_PINS_PER_REG 8
	#define MUX_PINS_BITS 4
	#define MUX_PINS_MASK 0x0f
	#define DATA_PINS_PER_REG 32
	#define DATA_PINS_BITS 1
	#define DATA_PINS_MASK 0x01
	#define DLEVEL_PINS_PER_REG 16
	#define DLEVEL_PINS_BITS 2
	#define DLEVEL_PINS_MASK 0x03
	#define PULL_PINS_PER_REG 16
	#define PULL_PINS_BITS 2
	#define PULL_PINS_MASK 0x03

	#define IRQ_PER_BANK 32

	#define IRQ_CFG_REG 0x200
	#define IRQ_CFG_IRQ_PER_REG 8
	#define IRQ_CFG_IRQ_BITS 4
	#define IRQ_CFG_IRQ_MASK ((1 << IRQ_CFG_IRQ_BITS) - 1)
	#define IRQ_CTRL_REG 0x210
	#define IRQ_CTRL_IRQ_PER_REG 32
	#define IRQ_CTRL_IRQ_BITS 1
	#define IRQ_CTRL_IRQ_MASK ((1 << IRQ_CTRL_IRQ_BITS) - 1)
	#define IRQ_STATUS_REG 0x214
	#define IRQ_STATUS_IRQ_PER_REG 32
	#define IRQ_STATUS_IRQ_BITS 1
	#define IRQ_STATUS_IRQ_MASK ((1 << IRQ_STATUS_IRQ_BITS) - 1)

	#define IRQ_DEBOUNCE_REG 0x218

	#define IRQ_MEM_SIZE 0x20

	#define IRQ_EDGE_RISING 0x00
	#define IRQ_EDGE_FALLING 0x01
	#define IRQ_LEVEL_HIGH 0x02
	#define IRQ_LEVEL_LOW 0x03
	#define IRQ_EDGE_BOTH 0x04

	#define SUN4I_FUNC_INPUT 0
	#define SUN4I_FUNC_IRQ 6

	#define PINCTRL_SUN5I_A10S BIT(1)
	#define PINCTRL_SUN5I_A13 BIT(2)
	#define PINCTRL_SUN5I_GR8 BIT(3)
	#define PINCTRL_SUN6I_A31 BIT(4)
	#define PINCTRL_SUN6I_A31S BIT(5)
	#define PINCTRL_SUN4I_A10 BIT(6)
	#define PINCTRL_SUN7I_A20 BIT(7)
	#define PINCTRL_SUN8I_R40 BIT(8)

	struct sunxi_desc_function {
	unsigned long variant;
	const char *name;
	u8 muxval;
	u8 irqbank;
	u8 irqnum;
	};

	struct sunxi_desc_pin {
	struct pinctrl_pin_desc pin;
	unsigned long variant;
	struct sunxi_desc_function *functions;
	};

	struct sunxi_pinctrl_desc {
	const struct sunxi_desc_pin *pins;
	int npins;
	unsigned pin_base;
	unsigned irq_banks;
	const unsigned int *irq_bank_map;
	bool irq_read_needs_mux;
	bool disable_strict_mode;
	};

	struct sunxi_pinctrl_function {
	const char *name;
	const char **groups;
	unsigned ngroups;
	};

	struct sunxi_pinctrl_group {
	const char *name;
	unsigned pin;
	};

	struct sunxi_pinctrl_regulator {
	struct regulator *regulator;
	refcount_t refcount;
	};

	struct sunxi_pinctrl {
	void __iomem *membase;
	struct gpio_chip *chip;
	const struct sunxi_pinctrl_desc *desc;
	struct device *dev;
	struct sunxi_pinctrl_regulator regulators[9];
	struct irq_domain *domain;
	struct sunxi_pinctrl_function *functions;
	unsigned nfunctions;
	struct sunxi_pinctrl_group *groups;
	unsigned ngroups;
	int *irq;
	unsigned *irq_array;
	raw_spinlock_t lock;
	struct pinctrl_dev *pctl_dev;
	unsigned long variant;
	};

	#define SUNXI_PIN(_pin, ...) \
	{ \
	.pin = _pin, \
	.functions = (struct sunxi_desc_function[]){ \
	__VA_ARGS__, { } }, \
	}

	#define SUNXI_PIN_VARIANT(_pin, _variant, ...) \
	{ \
	.pin = _pin, \
	.variant = _variant, \
	.functions = (struct sunxi_desc_function[]){ \
	__VA_ARGS__, { } }, \
	}

	#define SUNXI_FUNCTION(_val, _name) \
	{ \
	.name = _name, \
	.muxval = _val, \
	}

	#define SUNXI_FUNCTION_VARIANT(_val, _name, _variant) \
	{ \
	.name = _name, \
	.muxval = _val, \
	.variant = _variant, \
	}

	#define SUNXI_FUNCTION_IRQ(_val, _irq) \
	{ \
	.name = "irq", \
	.muxval = _val, \
	.irqnum = _irq, \
	}

	#define SUNXI_FUNCTION_IRQ_BANK(_val, _bank, _irq) \
	{ \
	.name = "irq", \
	.muxval = _val, \
	.irqbank = _bank, \
	.irqnum = _irq, \
	}

	/*
	* The sunXi PIO registers are organized as is:
	* 0x00 - 0x0c Muxing values.
	* 8 pins per register, each pin having a 4bits value
	* 0x10 Pin values
	* 32 bits per register, each pin corresponding to one bit
	* 0x14 - 0x18 Drive level
	* 16 pins per register, each pin having a 2bits value
	* 0x1c - 0x20 Pull-Up values
	* 16 pins per register, each pin having a 2bits value
	*
	* This is for the first bank. Each bank will have the same layout,
	* with an offset being a multiple of 0x24.
	*
	* The following functions calculate from the pin number the register
	* and the bit offset that we should access.
	*/
	static inline u32 sunxi_mux_reg(u16 pin)
	{
	u8 bank = pin / PINS_PER_BANK;
	u32 offset = bank * BANK_MEM_SIZE;
	offset += MUX_REGS_OFFSET;
	offset += pin % PINS_PER_BANK / MUX_PINS_PER_REG * 0x04;
	return round_down(offset, 4);
	}

	static inline u32 sunxi_mux_offset(u16 pin)
	{
	u32 pin_num = pin % MUX_PINS_PER_REG;
	return pin_num * MUX_PINS_BITS;
	}

	static inline u32 sunxi_data_reg(u16 pin)
	{
	u8 bank = pin / PINS_PER_BANK;
	u32 offset = bank * BANK_MEM_SIZE;
	offset += DATA_REGS_OFFSET;
	offset += pin % PINS_PER_BANK / DATA_PINS_PER_REG * 0x04;
	return round_down(offset, 4);
	}

	static inline u32 sunxi_data_offset(u16 pin)
	{
	u32 pin_num = pin % DATA_PINS_PER_REG;
	return pin_num * DATA_PINS_BITS;
	}

	static inline u32 sunxi_dlevel_reg(u16 pin)
	{
	u8 bank = pin / PINS_PER_BANK;
	u32 offset = bank * BANK_MEM_SIZE;
	offset += DLEVEL_REGS_OFFSET;
	offset += pin % PINS_PER_BANK / DLEVEL_PINS_PER_REG * 0x04;
	return round_down(offset, 4);
	}

	static inline u32 sunxi_dlevel_offset(u16 pin)
	{
	u32 pin_num = pin % DLEVEL_PINS_PER_REG;
	return pin_num * DLEVEL_PINS_BITS;
	}

	static inline u32 sunxi_pull_reg(u16 pin)
	{
	u8 bank = pin / PINS_PER_BANK;
	u32 offset = bank * BANK_MEM_SIZE;
	offset += PULL_REGS_OFFSET;
	offset += pin % PINS_PER_BANK / PULL_PINS_PER_REG * 0x04;
	return round_down(offset, 4);
	}

	static inline u32 sunxi_pull_offset(u16 pin)
	{
	u32 pin_num = pin % PULL_PINS_PER_REG;
	return pin_num * PULL_PINS_BITS;
	}

	static inline u32 sunxi_irq_hw_bank_num(const struct sunxi_pinctrl_desc *desc, u8 bank)
	{
	if (!desc->irq_bank_map)
	return bank;
	else
	return desc->irq_bank_map[bank];
	}

	static inline u32 sunxi_irq_cfg_reg(const struct sunxi_pinctrl_desc *desc,
	u16 irq)
	{
	u8 bank = irq / IRQ_PER_BANK;
	u8 reg = (irq % IRQ_PER_BANK) / IRQ_CFG_IRQ_PER_REG * 0x04;

	return IRQ_CFG_REG +
	sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE + reg;
	}

	static inline u32 sunxi_irq_cfg_offset(u16 irq)
	{
	u32 irq_num = irq % IRQ_CFG_IRQ_PER_REG;
	return irq_num * IRQ_CFG_IRQ_BITS;
	}

	static inline u32 sunxi_irq_ctrl_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
	{
	return IRQ_CTRL_REG + sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
	}

	static inline u32 sunxi_irq_ctrl_reg(const struct sunxi_pinctrl_desc *desc,
	u16 irq)
	{
	u8 bank = irq / IRQ_PER_BANK;

	return sunxi_irq_ctrl_reg_from_bank(desc, bank);
	}

	static inline u32 sunxi_irq_ctrl_offset(u16 irq)
	{
	u32 irq_num = irq % IRQ_CTRL_IRQ_PER_REG;
	return irq_num * IRQ_CTRL_IRQ_BITS;
	}

	static inline u32 sunxi_irq_debounce_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
	{
	return IRQ_DEBOUNCE_REG +
	sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
	}

	static inline u32 sunxi_irq_status_reg_from_bank(const struct sunxi_pinctrl_desc *desc, u8 bank)
	{
	return IRQ_STATUS_REG +
	sunxi_irq_hw_bank_num(desc, bank) * IRQ_MEM_SIZE;
	}

	static inline u32 sunxi_irq_status_reg(const struct sunxi_pinctrl_desc *desc,
	u16 irq)
	{
	u8 bank = irq / IRQ_PER_BANK;

	return sunxi_irq_status_reg_from_bank(desc, bank);
	}

	static inline u32 sunxi_irq_status_offset(u16 irq)
	{
	u32 irq_num = irq % IRQ_STATUS_IRQ_PER_REG;
	return irq_num * IRQ_STATUS_IRQ_BITS;
	}

	int sunxi_pinctrl_init_with_variant(struct platform_device *pdev,
	const struct sunxi_pinctrl_desc *desc,
	unsigned long variant);

	#define sunxi_pinctrl_init(_dev, _desc) \
	sunxi_pinctrl_init_with_variant(_dev, _desc, 0)

	#endif /* __PINCTRL_SUNXI_H */