drivers/gpio/zynq_gpio.c - u-boot - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Xilinx Zynq GPIO device driver
  *
  * Copyright (C) 2015 DAVE Embedded Systems <devel@dave.eu>
  *
  * Most of code taken from linux kernel driver (linux/drivers/gpio/gpio-zynq.c)
  * Copyright (C) 2009 - 2014 Xilinx, Inc.
  */

 #include <common.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
 #include <linux/bitops.h>
 #include <linux/errno.h>
 #include <dm.h>
 #include <fdtdec.h>

 /* Maximum banks */
 #define ZYNQ_GPIO_MAX_BANK	4

 #define ZYNQ_GPIO_BANK0_NGPIO	32
 #define ZYNQ_GPIO_BANK1_NGPIO	22
 #define ZYNQ_GPIO_BANK2_NGPIO	32
 #define ZYNQ_GPIO_BANK3_NGPIO	32

 #define ZYNQ_GPIO_NR_GPIOS	(ZYNQ_GPIO_BANK0_NGPIO + \
 				 ZYNQ_GPIO_BANK1_NGPIO + \
 				 ZYNQ_GPIO_BANK2_NGPIO + \
 				 ZYNQ_GPIO_BANK3_NGPIO)

 #define ZYNQMP_GPIO_MAX_BANK	6

 #define ZYNQMP_GPIO_BANK0_NGPIO	26
 #define ZYNQMP_GPIO_BANK1_NGPIO	26
 #define ZYNQMP_GPIO_BANK2_NGPIO	26
 #define ZYNQMP_GPIO_BANK3_NGPIO	32
 #define ZYNQMP_GPIO_BANK4_NGPIO	32
 #define ZYNQMP_GPIO_BANK5_NGPIO	32

 #define ZYNQMP_GPIO_NR_GPIOS	174

 #define ZYNQ_GPIO_BANK0_PIN_MIN(str)	0
 #define ZYNQ_GPIO_BANK0_PIN_MAX(str)	(ZYNQ_GPIO_BANK0_PIN_MIN(str) + \
 					ZYNQ##str##_GPIO_BANK0_NGPIO - 1)
 #define ZYNQ_GPIO_BANK1_PIN_MIN(str)	(ZYNQ_GPIO_BANK0_PIN_MAX(str) + 1)
 #define ZYNQ_GPIO_BANK1_PIN_MAX(str)	(ZYNQ_GPIO_BANK1_PIN_MIN(str) + \
 					ZYNQ##str##_GPIO_BANK1_NGPIO - 1)
 #define ZYNQ_GPIO_BANK2_PIN_MIN(str)	(ZYNQ_GPIO_BANK1_PIN_MAX(str) + 1)
 #define ZYNQ_GPIO_BANK2_PIN_MAX(str)	(ZYNQ_GPIO_BANK2_PIN_MIN(str) + \
 					ZYNQ##str##_GPIO_BANK2_NGPIO - 1)
 #define ZYNQ_GPIO_BANK3_PIN_MIN(str)	(ZYNQ_GPIO_BANK2_PIN_MAX(str) + 1)
 #define ZYNQ_GPIO_BANK3_PIN_MAX(str)	(ZYNQ_GPIO_BANK3_PIN_MIN(str) + \
 					ZYNQ##str##_GPIO_BANK3_NGPIO - 1)
 #define ZYNQ_GPIO_BANK4_PIN_MIN(str)	(ZYNQ_GPIO_BANK3_PIN_MAX(str) + 1)
 #define ZYNQ_GPIO_BANK4_PIN_MAX(str)	(ZYNQ_GPIO_BANK4_PIN_MIN(str) + \
 					ZYNQ##str##_GPIO_BANK4_NGPIO - 1)
 #define ZYNQ_GPIO_BANK5_PIN_MIN(str)	(ZYNQ_GPIO_BANK4_PIN_MAX(str) + 1)
 #define ZYNQ_GPIO_BANK5_PIN_MAX(str)	(ZYNQ_GPIO_BANK5_PIN_MIN(str) + \
 					ZYNQ##str##_GPIO_BANK5_NGPIO - 1)

 /* Register offsets for the GPIO device */
 /* LSW Mask & Data -WO */
 #define ZYNQ_GPIO_DATA_LSW_OFFSET(BANK)	(0x000 + (8 * BANK))
 /* MSW Mask & Data -WO */
 #define ZYNQ_GPIO_DATA_MSW_OFFSET(BANK)	(0x004 + (8 * BANK))
 /* Data Register-RW */
 #define ZYNQ_GPIO_DATA_RO_OFFSET(BANK)	(0x060 + (4 * BANK))
 /* Direction mode reg-RW */
 #define ZYNQ_GPIO_DIRM_OFFSET(BANK)	(0x204 + (0x40 * BANK))
 /* Output enable reg-RW */
 #define ZYNQ_GPIO_OUTEN_OFFSET(BANK)	(0x208 + (0x40 * BANK))
 /* Interrupt mask reg-RO */
 #define ZYNQ_GPIO_INTMASK_OFFSET(BANK)	(0x20C + (0x40 * BANK))
 /* Interrupt enable reg-WO */
 #define ZYNQ_GPIO_INTEN_OFFSET(BANK)	(0x210 + (0x40 * BANK))
 /* Interrupt disable reg-WO */
 #define ZYNQ_GPIO_INTDIS_OFFSET(BANK)	(0x214 + (0x40 * BANK))
 /* Interrupt status reg-RO */
 #define ZYNQ_GPIO_INTSTS_OFFSET(BANK)	(0x218 + (0x40 * BANK))
 /* Interrupt type reg-RW */
 #define ZYNQ_GPIO_INTTYPE_OFFSET(BANK)	(0x21C + (0x40 * BANK))
 /* Interrupt polarity reg-RW */
 #define ZYNQ_GPIO_INTPOL_OFFSET(BANK)	(0x220 + (0x40 * BANK))
 /* Interrupt on any, reg-RW */
 #define ZYNQ_GPIO_INTANY_OFFSET(BANK)	(0x224 + (0x40 * BANK))

 /* Disable all interrupts mask */
 #define ZYNQ_GPIO_IXR_DISABLE_ALL	0xFFFFFFFF

 /* Mid pin number of a bank */
 #define ZYNQ_GPIO_MID_PIN_NUM 16

 /* GPIO upper 16 bit mask */
 #define ZYNQ_GPIO_UPPER_MASK 0xFFFF0000

 #define PMC_GPIO_NR_GPIOS	116
 #define PMC_GPIO_MAX_BANK	5

 struct zynq_gpio_plat {
 	phys_addr_t base;
 	const struct zynq_platform_data *p_data;
 };

 /**
  * struct zynq_platform_data -  zynq gpio platform data structure
  * @label:	string to store in gpio->label
  * @ngpio:	max number of gpio pins
  * @max_bank:	maximum number of gpio banks
  * @bank_min:	this array represents bank's min pin
  * @bank_max:	this array represents bank's max pin
  */
 struct zynq_platform_data {
 	const char *label;
 	u16 ngpio;
 	u32 max_bank;
 	u32 bank_min[ZYNQMP_GPIO_MAX_BANK];
 	u32 bank_max[ZYNQMP_GPIO_MAX_BANK];
 };

 #define VERSAL_GPIO_NR_GPIOS	58
 #define VERSAL_GPIO_MAX_BANK	4

 static const struct zynq_platform_data versal_gpio_def = {
 	.label = "versal_gpio",
 	.ngpio = VERSAL_GPIO_NR_GPIOS,
 	.max_bank = VERSAL_GPIO_MAX_BANK,
 	.bank_min[0] = 0,
 	.bank_max[0] = 25,
 	.bank_min[3] = 26,
 	.bank_max[3] = 57,
 };

 static const struct zynq_platform_data pmc_gpio_def = {
 	.label = "pmc_gpio",
 	.ngpio = PMC_GPIO_NR_GPIOS,
 	.max_bank = PMC_GPIO_MAX_BANK,
 	.bank_min[0] = 0,
 	.bank_max[0] = 25,
 	.bank_min[1] = 26,
 	.bank_max[1] = 51,
 	.bank_min[3] = 52,
 	.bank_max[3] = 83,
 	.bank_min[4] = 84,
 	.bank_max[4] = 115,
 };

 static const struct zynq_platform_data zynqmp_gpio_def = {
 	.label = "zynqmp_gpio",
 	.ngpio = ZYNQMP_GPIO_NR_GPIOS,
 	.max_bank = ZYNQMP_GPIO_MAX_BANK,
 	.bank_min[0] = ZYNQ_GPIO_BANK0_PIN_MIN(MP),
 	.bank_max[0] = ZYNQ_GPIO_BANK0_PIN_MAX(MP),
 	.bank_min[1] = ZYNQ_GPIO_BANK1_PIN_MIN(MP),
 	.bank_max[1] = ZYNQ_GPIO_BANK1_PIN_MAX(MP),
 	.bank_min[2] = ZYNQ_GPIO_BANK2_PIN_MIN(MP),
 	.bank_max[2] = ZYNQ_GPIO_BANK2_PIN_MAX(MP),
 	.bank_min[3] = ZYNQ_GPIO_BANK3_PIN_MIN(MP),
 	.bank_max[3] = ZYNQ_GPIO_BANK3_PIN_MAX(MP),
 	.bank_min[4] = ZYNQ_GPIO_BANK4_PIN_MIN(MP),
 	.bank_max[4] = ZYNQ_GPIO_BANK4_PIN_MAX(MP),
 	.bank_min[5] = ZYNQ_GPIO_BANK5_PIN_MIN(MP),
 	.bank_max[5] = ZYNQ_GPIO_BANK5_PIN_MAX(MP),
 };

 static const struct zynq_platform_data zynq_gpio_def = {
 	.label = "zynq_gpio",
 	.ngpio = ZYNQ_GPIO_NR_GPIOS,
 	.max_bank = ZYNQ_GPIO_MAX_BANK,
 	.bank_min[0] = ZYNQ_GPIO_BANK0_PIN_MIN(),
 	.bank_max[0] = ZYNQ_GPIO_BANK0_PIN_MAX(),
 	.bank_min[1] = ZYNQ_GPIO_BANK1_PIN_MIN(),
 	.bank_max[1] = ZYNQ_GPIO_BANK1_PIN_MAX(),
 	.bank_min[2] = ZYNQ_GPIO_BANK2_PIN_MIN(),
 	.bank_max[2] = ZYNQ_GPIO_BANK2_PIN_MAX(),
 	.bank_min[3] = ZYNQ_GPIO_BANK3_PIN_MIN(),
 	.bank_max[3] = ZYNQ_GPIO_BANK3_PIN_MAX(),
 };

 /**
  * zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank
  * for a given pin in the GPIO device
  * @pin_num:	gpio pin number within the device
  * @bank_num:	an output parameter used to return the bank number of the gpio
  *		pin
  * @bank_pin_num: an output parameter used to return pin number within a bank
  *		  for the given gpio pin
  *
  * Returns the bank number and pin offset within the bank.
  */
 static inline void zynq_gpio_get_bank_pin(unsigned int pin_num,
 					  unsigned int *bank_num,
 					  unsigned int *bank_pin_num,
 					  struct udevice *dev)
 {
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);
 	u32 bank;

 	for (bank = 0; bank < plat->p_data->max_bank; bank++) {
 		if (pin_num >= plat->p_data->bank_min[bank] &&
 		    pin_num <= plat->p_data->bank_max[bank]) {
 			*bank_num = bank;
 			*bank_pin_num = pin_num -
 					plat->p_data->bank_min[bank];
 			return;
 		}
 	}

 	if (bank >= plat->p_data->max_bank) {
 		printf("Invalid bank and pin num\n");
 		*bank_num = 0;
 		*bank_pin_num = 0;
 	}
 }

 static int gpio_is_valid(unsigned gpio, struct udevice *dev)
 {
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	return gpio < plat->p_data->ngpio;
 }

 static int check_gpio(unsigned gpio, struct udevice *dev)
 {
 	if (!gpio_is_valid(gpio, dev)) {
 		printf("ERROR : check_gpio: invalid GPIO %d\n", gpio);
 		return -1;
 	}
 	return 0;
 }

 static int zynq_gpio_get_value(struct udevice *dev, unsigned gpio)
 {
 	u32 data;
 	unsigned int bank_num, bank_pin_num;
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	if (check_gpio(gpio, dev) < 0)
 		return -1;

 	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

 	data = readl(plat->base +
 			     ZYNQ_GPIO_DATA_RO_OFFSET(bank_num));

 	return (data >> bank_pin_num) & 1;
 }

 static int zynq_gpio_set_value(struct udevice *dev, unsigned gpio, int value)
 {
 	unsigned int reg_offset, bank_num, bank_pin_num;
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	if (check_gpio(gpio, dev) < 0)
 		return -1;

 	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

 	if (bank_pin_num >= ZYNQ_GPIO_MID_PIN_NUM) {
 		/* only 16 data bits in bit maskable reg */
 		bank_pin_num -= ZYNQ_GPIO_MID_PIN_NUM;
 		reg_offset = ZYNQ_GPIO_DATA_MSW_OFFSET(bank_num);
 	} else {
 		reg_offset = ZYNQ_GPIO_DATA_LSW_OFFSET(bank_num);
 	}

 	/*
 	 * get the 32 bit value to be written to the mask/data register where
 	 * the upper 16 bits is the mask and lower 16 bits is the data
 	 */
 	value = !!value;
 	value = ~(1 << (bank_pin_num + ZYNQ_GPIO_MID_PIN_NUM)) &
 		((value << bank_pin_num) | ZYNQ_GPIO_UPPER_MASK);

 	writel(value, plat->base + reg_offset);

 	return 0;
 }

 static int zynq_gpio_direction_input(struct udevice *dev, unsigned gpio)
 {
 	u32 reg;
 	unsigned int bank_num, bank_pin_num;
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	if (check_gpio(gpio, dev) < 0)
 		return -1;

 	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

 	/* bank 0 pins 7 and 8 are special and cannot be used as inputs */
 	if (bank_num == 0 && (bank_pin_num == 7 || bank_pin_num == 8))
 		return -1;

 	/* clear the bit in direction mode reg to set the pin as input */
 	reg = readl(plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
 	reg &= ~BIT(bank_pin_num);
 	writel(reg, plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));

 	return 0;
 }

 static int zynq_gpio_direction_output(struct udevice *dev, unsigned gpio,
 				      int value)
 {
 	u32 reg;
 	unsigned int bank_num, bank_pin_num;
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	if (check_gpio(gpio, dev) < 0)
 		return -1;

 	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

 	/* set the GPIO pin as output */
 	reg = readl(plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
 	reg |= BIT(bank_pin_num);
 	writel(reg, plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));

 	/* configure the output enable reg for the pin */
 	reg = readl(plat->base + ZYNQ_GPIO_OUTEN_OFFSET(bank_num));
 	reg |= BIT(bank_pin_num);
 	writel(reg, plat->base + ZYNQ_GPIO_OUTEN_OFFSET(bank_num));

 	/* set the state of the pin */
 	zynq_gpio_set_value(dev, gpio, value);
 	return 0;
 }

 static int zynq_gpio_get_function(struct udevice *dev, unsigned offset)
 {
 	u32 reg;
 	unsigned int bank_num, bank_pin_num;
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	if (check_gpio(offset, dev) < 0)
 		return -1;

 	zynq_gpio_get_bank_pin(offset, &bank_num, &bank_pin_num, dev);

 	/* set the GPIO pin as output */
 	reg = readl(plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
 	reg &= BIT(bank_pin_num);
 	if (reg)
 		return GPIOF_OUTPUT;
 	else
 		return GPIOF_INPUT;
 }

 static const struct dm_gpio_ops gpio_zynq_ops = {
 	.direction_input	= zynq_gpio_direction_input,
 	.direction_output	= zynq_gpio_direction_output,
 	.get_value		= zynq_gpio_get_value,
 	.set_value		= zynq_gpio_set_value,
 	.get_function		= zynq_gpio_get_function,
 };

 static const struct udevice_id zynq_gpio_ids[] = {
 	{ .compatible = "xlnx,zynq-gpio-1.0",
 	  .data = (ulong)&zynq_gpio_def},
 	{ .compatible = "xlnx,zynqmp-gpio-1.0",
 	  .data = (ulong)&zynqmp_gpio_def},
 	{ .compatible = "xlnx,versal-gpio-1.0",
 	  .data = (ulong)&versal_gpio_def},
 	{ .compatible = "xlnx,pmc-gpio-1.0",
 	  .data = (ulong)&pmc_gpio_def },
 	{ }
 };

 static int zynq_gpio_probe(struct udevice *dev)
 {
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);
 	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
 	const void *label_ptr;

 	label_ptr = dev_read_prop(dev, "label", NULL);
 	if (label_ptr) {
 		uc_priv->bank_name = strdup(label_ptr);
 		if (!uc_priv->bank_name)
 			return -ENOMEM;
 	} else {
 		uc_priv->bank_name = dev->name;
 	}

 	if (plat->p_data)
 		uc_priv->gpio_count = plat->p_data->ngpio;

 	return 0;
 }

 static int zynq_gpio_of_to_plat(struct udevice *dev)
 {
 	struct zynq_gpio_plat *plat = dev_get_plat(dev);

 	plat->base = (phys_addr_t)dev_read_addr(dev);

 	plat->p_data =
 		(struct zynq_platform_data *)dev_get_driver_data(dev);

 	return 0;
 }

 U_BOOT_DRIVER(gpio_zynq) = {
 	.name	= "gpio_zynq",
 	.id	= UCLASS_GPIO,
 	.ops	= &gpio_zynq_ops,
 	.of_match = zynq_gpio_ids,
 	.of_to_plat = zynq_gpio_of_to_plat,
 	.probe	= zynq_gpio_probe,
 	.plat_auto	= sizeof(struct zynq_gpio_plat),
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Xilinx Zynq GPIO device driver
	*
	* Copyright (C) 2015 DAVE Embedded Systems <devel@dave.eu>
	*
	* Most of code taken from linux kernel driver (linux/drivers/gpio/gpio-zynq.c)
	* Copyright (C) 2009 - 2014 Xilinx, Inc.
	*/

	#include <common.h>
	#include <asm/gpio.h>
	#include <asm/io.h>
	#include <linux/bitops.h>
	#include <linux/errno.h>
	#include <dm.h>
	#include <fdtdec.h>

	/* Maximum banks */
	#define ZYNQ_GPIO_MAX_BANK 4

	#define ZYNQ_GPIO_BANK0_NGPIO 32
	#define ZYNQ_GPIO_BANK1_NGPIO 22
	#define ZYNQ_GPIO_BANK2_NGPIO 32
	#define ZYNQ_GPIO_BANK3_NGPIO 32

	#define ZYNQ_GPIO_NR_GPIOS (ZYNQ_GPIO_BANK0_NGPIO + \
	ZYNQ_GPIO_BANK1_NGPIO + \
	ZYNQ_GPIO_BANK2_NGPIO + \
	ZYNQ_GPIO_BANK3_NGPIO)

	#define ZYNQMP_GPIO_MAX_BANK 6

	#define ZYNQMP_GPIO_BANK0_NGPIO 26
	#define ZYNQMP_GPIO_BANK1_NGPIO 26
	#define ZYNQMP_GPIO_BANK2_NGPIO 26
	#define ZYNQMP_GPIO_BANK3_NGPIO 32
	#define ZYNQMP_GPIO_BANK4_NGPIO 32
	#define ZYNQMP_GPIO_BANK5_NGPIO 32

	#define ZYNQMP_GPIO_NR_GPIOS 174

	#define ZYNQ_GPIO_BANK0_PIN_MIN(str) 0
	#define ZYNQ_GPIO_BANK0_PIN_MAX(str) (ZYNQ_GPIO_BANK0_PIN_MIN(str) + \
	ZYNQ##str##_GPIO_BANK0_NGPIO - 1)
	#define ZYNQ_GPIO_BANK1_PIN_MIN(str) (ZYNQ_GPIO_BANK0_PIN_MAX(str) + 1)
	#define ZYNQ_GPIO_BANK1_PIN_MAX(str) (ZYNQ_GPIO_BANK1_PIN_MIN(str) + \
	ZYNQ##str##_GPIO_BANK1_NGPIO - 1)
	#define ZYNQ_GPIO_BANK2_PIN_MIN(str) (ZYNQ_GPIO_BANK1_PIN_MAX(str) + 1)
	#define ZYNQ_GPIO_BANK2_PIN_MAX(str) (ZYNQ_GPIO_BANK2_PIN_MIN(str) + \
	ZYNQ##str##_GPIO_BANK2_NGPIO - 1)
	#define ZYNQ_GPIO_BANK3_PIN_MIN(str) (ZYNQ_GPIO_BANK2_PIN_MAX(str) + 1)
	#define ZYNQ_GPIO_BANK3_PIN_MAX(str) (ZYNQ_GPIO_BANK3_PIN_MIN(str) + \
	ZYNQ##str##_GPIO_BANK3_NGPIO - 1)
	#define ZYNQ_GPIO_BANK4_PIN_MIN(str) (ZYNQ_GPIO_BANK3_PIN_MAX(str) + 1)
	#define ZYNQ_GPIO_BANK4_PIN_MAX(str) (ZYNQ_GPIO_BANK4_PIN_MIN(str) + \
	ZYNQ##str##_GPIO_BANK4_NGPIO - 1)
	#define ZYNQ_GPIO_BANK5_PIN_MIN(str) (ZYNQ_GPIO_BANK4_PIN_MAX(str) + 1)
	#define ZYNQ_GPIO_BANK5_PIN_MAX(str) (ZYNQ_GPIO_BANK5_PIN_MIN(str) + \
	ZYNQ##str##_GPIO_BANK5_NGPIO - 1)

	/* Register offsets for the GPIO device */
	/* LSW Mask & Data -WO */
	#define ZYNQ_GPIO_DATA_LSW_OFFSET(BANK) (0x000 + (8 * BANK))
	/* MSW Mask & Data -WO */
	#define ZYNQ_GPIO_DATA_MSW_OFFSET(BANK) (0x004 + (8 * BANK))
	/* Data Register-RW */
	#define ZYNQ_GPIO_DATA_RO_OFFSET(BANK) (0x060 + (4 * BANK))
	/* Direction mode reg-RW */
	#define ZYNQ_GPIO_DIRM_OFFSET(BANK) (0x204 + (0x40 * BANK))
	/* Output enable reg-RW */
	#define ZYNQ_GPIO_OUTEN_OFFSET(BANK) (0x208 + (0x40 * BANK))
	/* Interrupt mask reg-RO */
	#define ZYNQ_GPIO_INTMASK_OFFSET(BANK) (0x20C + (0x40 * BANK))
	/* Interrupt enable reg-WO */
	#define ZYNQ_GPIO_INTEN_OFFSET(BANK) (0x210 + (0x40 * BANK))
	/* Interrupt disable reg-WO */
	#define ZYNQ_GPIO_INTDIS_OFFSET(BANK) (0x214 + (0x40 * BANK))
	/* Interrupt status reg-RO */
	#define ZYNQ_GPIO_INTSTS_OFFSET(BANK) (0x218 + (0x40 * BANK))
	/* Interrupt type reg-RW */
	#define ZYNQ_GPIO_INTTYPE_OFFSET(BANK) (0x21C + (0x40 * BANK))
	/* Interrupt polarity reg-RW */
	#define ZYNQ_GPIO_INTPOL_OFFSET(BANK) (0x220 + (0x40 * BANK))
	/* Interrupt on any, reg-RW */
	#define ZYNQ_GPIO_INTANY_OFFSET(BANK) (0x224 + (0x40 * BANK))

	/* Disable all interrupts mask */
	#define ZYNQ_GPIO_IXR_DISABLE_ALL 0xFFFFFFFF

	/* Mid pin number of a bank */
	#define ZYNQ_GPIO_MID_PIN_NUM 16

	/* GPIO upper 16 bit mask */
	#define ZYNQ_GPIO_UPPER_MASK 0xFFFF0000

	#define PMC_GPIO_NR_GPIOS 116
	#define PMC_GPIO_MAX_BANK 5

	struct zynq_gpio_plat {
	phys_addr_t base;
	const struct zynq_platform_data *p_data;
	};

	/**
	* struct zynq_platform_data - zynq gpio platform data structure
	* @label: string to store in gpio->label
	* @ngpio: max number of gpio pins
	* @max_bank: maximum number of gpio banks
	* @bank_min: this array represents bank's min pin
	* @bank_max: this array represents bank's max pin
	*/
	struct zynq_platform_data {
	const char *label;
	u16 ngpio;
	u32 max_bank;
	u32 bank_min[ZYNQMP_GPIO_MAX_BANK];
	u32 bank_max[ZYNQMP_GPIO_MAX_BANK];
	};

	#define VERSAL_GPIO_NR_GPIOS 58
	#define VERSAL_GPIO_MAX_BANK 4

	static const struct zynq_platform_data versal_gpio_def = {
	.label = "versal_gpio",
	.ngpio = VERSAL_GPIO_NR_GPIOS,
	.max_bank = VERSAL_GPIO_MAX_BANK,
	.bank_min[0] = 0,
	.bank_max[0] = 25,
	.bank_min[3] = 26,
	.bank_max[3] = 57,
	};

	static const struct zynq_platform_data pmc_gpio_def = {
	.label = "pmc_gpio",
	.ngpio = PMC_GPIO_NR_GPIOS,
	.max_bank = PMC_GPIO_MAX_BANK,
	.bank_min[0] = 0,
	.bank_max[0] = 25,
	.bank_min[1] = 26,
	.bank_max[1] = 51,
	.bank_min[3] = 52,
	.bank_max[3] = 83,
	.bank_min[4] = 84,
	.bank_max[4] = 115,
	};

	static const struct zynq_platform_data zynqmp_gpio_def = {
	.label = "zynqmp_gpio",
	.ngpio = ZYNQMP_GPIO_NR_GPIOS,
	.max_bank = ZYNQMP_GPIO_MAX_BANK,
	.bank_min[0] = ZYNQ_GPIO_BANK0_PIN_MIN(MP),
	.bank_max[0] = ZYNQ_GPIO_BANK0_PIN_MAX(MP),
	.bank_min[1] = ZYNQ_GPIO_BANK1_PIN_MIN(MP),
	.bank_max[1] = ZYNQ_GPIO_BANK1_PIN_MAX(MP),
	.bank_min[2] = ZYNQ_GPIO_BANK2_PIN_MIN(MP),
	.bank_max[2] = ZYNQ_GPIO_BANK2_PIN_MAX(MP),
	.bank_min[3] = ZYNQ_GPIO_BANK3_PIN_MIN(MP),
	.bank_max[3] = ZYNQ_GPIO_BANK3_PIN_MAX(MP),
	.bank_min[4] = ZYNQ_GPIO_BANK4_PIN_MIN(MP),
	.bank_max[4] = ZYNQ_GPIO_BANK4_PIN_MAX(MP),
	.bank_min[5] = ZYNQ_GPIO_BANK5_PIN_MIN(MP),
	.bank_max[5] = ZYNQ_GPIO_BANK5_PIN_MAX(MP),
	};

	static const struct zynq_platform_data zynq_gpio_def = {
	.label = "zynq_gpio",
	.ngpio = ZYNQ_GPIO_NR_GPIOS,
	.max_bank = ZYNQ_GPIO_MAX_BANK,
	.bank_min[0] = ZYNQ_GPIO_BANK0_PIN_MIN(),
	.bank_max[0] = ZYNQ_GPIO_BANK0_PIN_MAX(),
	.bank_min[1] = ZYNQ_GPIO_BANK1_PIN_MIN(),
	.bank_max[1] = ZYNQ_GPIO_BANK1_PIN_MAX(),
	.bank_min[2] = ZYNQ_GPIO_BANK2_PIN_MIN(),
	.bank_max[2] = ZYNQ_GPIO_BANK2_PIN_MAX(),
	.bank_min[3] = ZYNQ_GPIO_BANK3_PIN_MIN(),
	.bank_max[3] = ZYNQ_GPIO_BANK3_PIN_MAX(),
	};

	/**
	* zynq_gpio_get_bank_pin - Get the bank number and pin number within that bank
	* for a given pin in the GPIO device
	* @pin_num: gpio pin number within the device
	* @bank_num: an output parameter used to return the bank number of the gpio
	* pin
	* @bank_pin_num: an output parameter used to return pin number within a bank
	* for the given gpio pin
	*
	* Returns the bank number and pin offset within the bank.
	*/
	static inline void zynq_gpio_get_bank_pin(unsigned int pin_num,
	unsigned int *bank_num,
	unsigned int *bank_pin_num,
	struct udevice *dev)
	{
	struct zynq_gpio_plat *plat = dev_get_plat(dev);
	u32 bank;

	for (bank = 0; bank < plat->p_data->max_bank; bank++) {
	if (pin_num >= plat->p_data->bank_min[bank] &&
	pin_num <= plat->p_data->bank_max[bank]) {
	*bank_num = bank;
	*bank_pin_num = pin_num -
	plat->p_data->bank_min[bank];
	return;
	}
	}

	if (bank >= plat->p_data->max_bank) {
	printf("Invalid bank and pin num\n");
	*bank_num = 0;
	*bank_pin_num = 0;
	}
	}

	static int gpio_is_valid(unsigned gpio, struct udevice *dev)
	{
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	return gpio < plat->p_data->ngpio;
	}

	static int check_gpio(unsigned gpio, struct udevice *dev)
	{
	if (!gpio_is_valid(gpio, dev)) {
	printf("ERROR : check_gpio: invalid GPIO %d\n", gpio);
	return -1;
	}
	return 0;
	}

	static int zynq_gpio_get_value(struct udevice *dev, unsigned gpio)
	{
	u32 data;
	unsigned int bank_num, bank_pin_num;
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	if (check_gpio(gpio, dev) < 0)
	return -1;

	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

	data = readl(plat->base +
	ZYNQ_GPIO_DATA_RO_OFFSET(bank_num));

	return (data >> bank_pin_num) & 1;
	}

	static int zynq_gpio_set_value(struct udevice *dev, unsigned gpio, int value)
	{
	unsigned int reg_offset, bank_num, bank_pin_num;
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	if (check_gpio(gpio, dev) < 0)
	return -1;

	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

	if (bank_pin_num >= ZYNQ_GPIO_MID_PIN_NUM) {
	/* only 16 data bits in bit maskable reg */
	bank_pin_num -= ZYNQ_GPIO_MID_PIN_NUM;
	reg_offset = ZYNQ_GPIO_DATA_MSW_OFFSET(bank_num);
	} else {
	reg_offset = ZYNQ_GPIO_DATA_LSW_OFFSET(bank_num);
	}

	/*
	* get the 32 bit value to be written to the mask/data register where
	* the upper 16 bits is the mask and lower 16 bits is the data
	*/
	value = !!value;
	value = ~(1 << (bank_pin_num + ZYNQ_GPIO_MID_PIN_NUM)) &
	((value << bank_pin_num) \| ZYNQ_GPIO_UPPER_MASK);

	writel(value, plat->base + reg_offset);

	return 0;
	}

	static int zynq_gpio_direction_input(struct udevice *dev, unsigned gpio)
	{
	u32 reg;
	unsigned int bank_num, bank_pin_num;
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	if (check_gpio(gpio, dev) < 0)
	return -1;

	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

	/* bank 0 pins 7 and 8 are special and cannot be used as inputs */
	if (bank_num == 0 && (bank_pin_num == 7 \|\| bank_pin_num == 8))
	return -1;

	/* clear the bit in direction mode reg to set the pin as input */
	reg = readl(plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
	reg &= ~BIT(bank_pin_num);
	writel(reg, plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));

	return 0;
	}

	static int zynq_gpio_direction_output(struct udevice *dev, unsigned gpio,
	int value)
	{
	u32 reg;
	unsigned int bank_num, bank_pin_num;
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	if (check_gpio(gpio, dev) < 0)
	return -1;

	zynq_gpio_get_bank_pin(gpio, &bank_num, &bank_pin_num, dev);

	/* set the GPIO pin as output */
	reg = readl(plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
	reg \|= BIT(bank_pin_num);
	writel(reg, plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));

	/* configure the output enable reg for the pin */
	reg = readl(plat->base + ZYNQ_GPIO_OUTEN_OFFSET(bank_num));
	reg \|= BIT(bank_pin_num);
	writel(reg, plat->base + ZYNQ_GPIO_OUTEN_OFFSET(bank_num));

	/* set the state of the pin */
	zynq_gpio_set_value(dev, gpio, value);
	return 0;
	}

	static int zynq_gpio_get_function(struct udevice *dev, unsigned offset)
	{
	u32 reg;
	unsigned int bank_num, bank_pin_num;
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	if (check_gpio(offset, dev) < 0)
	return -1;

	zynq_gpio_get_bank_pin(offset, &bank_num, &bank_pin_num, dev);

	/* set the GPIO pin as output */
	reg = readl(plat->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num));
	reg &= BIT(bank_pin_num);
	if (reg)
	return GPIOF_OUTPUT;
	else
	return GPIOF_INPUT;
	}

	static const struct dm_gpio_ops gpio_zynq_ops = {
	.direction_input = zynq_gpio_direction_input,
	.direction_output = zynq_gpio_direction_output,
	.get_value = zynq_gpio_get_value,
	.set_value = zynq_gpio_set_value,
	.get_function = zynq_gpio_get_function,
	};

	static const struct udevice_id zynq_gpio_ids[] = {
	{ .compatible = "xlnx,zynq-gpio-1.0",
	.data = (ulong)&zynq_gpio_def},
	{ .compatible = "xlnx,zynqmp-gpio-1.0",
	.data = (ulong)&zynqmp_gpio_def},
	{ .compatible = "xlnx,versal-gpio-1.0",
	.data = (ulong)&versal_gpio_def},
	{ .compatible = "xlnx,pmc-gpio-1.0",
	.data = (ulong)&pmc_gpio_def },
	{ }
	};

	static int zynq_gpio_probe(struct udevice *dev)
	{
	struct zynq_gpio_plat *plat = dev_get_plat(dev);
	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
	const void *label_ptr;

	label_ptr = dev_read_prop(dev, "label", NULL);
	if (label_ptr) {
	uc_priv->bank_name = strdup(label_ptr);
	if (!uc_priv->bank_name)
	return -ENOMEM;
	} else {
	uc_priv->bank_name = dev->name;
	}

	if (plat->p_data)
	uc_priv->gpio_count = plat->p_data->ngpio;

	return 0;
	}

	static int zynq_gpio_of_to_plat(struct udevice *dev)
	{
	struct zynq_gpio_plat *plat = dev_get_plat(dev);

	plat->base = (phys_addr_t)dev_read_addr(dev);

	plat->p_data =
	(struct zynq_platform_data *)dev_get_driver_data(dev);

	return 0;
	}

	U_BOOT_DRIVER(gpio_zynq) = {
	.name = "gpio_zynq",
	.id = UCLASS_GPIO,
	.ops = &gpio_zynq_ops,
	.of_match = zynq_gpio_ids,
	.of_to_plat = zynq_gpio_of_to_plat,
	.probe = zynq_gpio_probe,
	.plat_auto = sizeof(struct zynq_gpio_plat),
	};