pinctrl: move the U300 GPIO driver to pinctrl

This driver will be converted to a dual GPIO + pinctrl driver
since it supports biasing and driving control options. Hopefully
it can serve as an example.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

3 files changed, 0 insertions, 927 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 8482a23887d..0f82aa8fa15 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -170,15 +170,6 @@ config GPIO_SCH
 	  The Intel Tunnel Creek processor has 5 GPIOs powered by the
 	  core power rail and 9 from suspend power supply.
 
-config GPIO_U300
-	bool "ST-Ericsson U300 COH 901 335/571 GPIO"
-	depends on GPIOLIB && ARCH_U300
-	help
-	  Say yes here to support GPIO interface on ST-Ericsson U300.
-	  The names of the two IP block variants supported are
-	  COH 901 335 and COH 901 571/3. They contain 3, 5 or 7
-	  ports of 8 GPIO pins each.
-
 config GPIO_VX855
 	tristate "VIA VX855/VX875 GPIO"
 	depends on PCI
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index dbcb0bcfd8d..7f20316fb15 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -54,7 +54,6 @@ obj-$(CONFIG_ARCH_DAVINCI_TNETV107X) += gpio-tnetv107x.o
 obj-$(CONFIG_GPIO_TPS65910)	+= gpio-tps65910.o
 obj-$(CONFIG_GPIO_TPS65912)	+= gpio-tps65912.o
 obj-$(CONFIG_GPIO_TWL4030)	+= gpio-twl4030.o
-obj-$(CONFIG_MACH_U300)		+= gpio-u300.o
 obj-$(CONFIG_GPIO_UCB1400)	+= gpio-ucb1400.o
 obj-$(CONFIG_GPIO_VR41XX)	+= gpio-vr41xx.o
 obj-$(CONFIG_GPIO_VX855)	+= gpio-vx855.o
diff --git a/drivers/gpio/gpio-u300.c b/drivers/gpio/gpio-u300.c
deleted file mode 100644
index 4035778852b..00000000000
--- a/drivers/gpio/gpio-u300.c
+++ /dev/null
@@ -1,917 +0,0 @@
-/*
- * U300 GPIO module.
- *
- * Copyright (C) 2007-2011 ST-Ericsson AB
- * License terms: GNU General Public License (GPL) version 2
- * This can driver either of the two basic GPIO cores
- * available in the U300 platforms:
- * COH 901 335   - Used in DB3150 (U300 1.0) and DB3200 (U330 1.0)
- * COH 901 571/3 - Used in DB3210 (U365 2.0) and DB3350 (U335 1.0)
- * Author: Linus Walleij <linus.walleij@linaro.org>
- * Author: Jonas Aaberg <jonas.aberg@stericsson.com>
- */
-#include <linux/module.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/delay.h>
-#include <linux/errno.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/err.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <mach/gpio-u300.h>
-
-/*
- * Bias modes for U300 GPIOs
- *
- * GPIO_U300_CONFIG_BIAS_UNKNOWN: this bias mode is not known to us
- * GPIO_U300_CONFIG_BIAS_FLOAT: no specific bias, the GPIO will float or state
- *	is not controlled by software
- * GPIO_U300_CONFIG_BIAS_PULL_UP: the GPIO will be pulled up (usually with high
- *	impedance to VDD)
- */
-#define GPIO_U300_CONFIG_BIAS_UNKNOWN	0x1000
-#define GPIO_U300_CONFIG_BIAS_FLOAT	0x1001
-#define GPIO_U300_CONFIG_BIAS_PULL_UP	0x1002
-
-/*
- * Drive modes for U300 GPIOs (output)
- *
- * GPIO_U300_CONFIG_DRIVE_PUSH_PULL: the GPIO will be driven actively high and
- *	low, this is the most typical case and is typically achieved with two
- *	active transistors on the output
- * GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN: the GPIO will be driven with open drain
- *	(open collector) which means it is usually wired with other output
- *	ports which are then pulled up with an external resistor
- * GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE: the GPIO will be driven with open drain
- *	(open emitter) which is the same as open drain mutatis mutandis but
- *	pulled to ground
- */
-#define GPIO_U300_CONFIG_DRIVE_PUSH_PULL	0x2000
-#define GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN	0x2001
-#define GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE	0x2002
-
-/*
- * Register definitions for COH 901 335 variant
- */
-#define U300_335_PORT_STRIDE				(0x1C)
-/* Port X Pin Data Register 32bit, this is both input and output (R/W) */
-#define U300_335_PXPDIR					(0x00)
-#define U300_335_PXPDOR					(0x00)
-/* Port X Pin Config Register 32bit (R/W) */
-#define U300_335_PXPCR					(0x04)
-/* This register layout is the same in both blocks */
-#define U300_GPIO_PXPCR_ALL_PINS_MODE_MASK		(0x0000FFFFUL)
-#define U300_GPIO_PXPCR_PIN_MODE_MASK			(0x00000003UL)
-#define U300_GPIO_PXPCR_PIN_MODE_SHIFT			(0x00000002UL)
-#define U300_GPIO_PXPCR_PIN_MODE_INPUT			(0x00000000UL)
-#define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL	(0x00000001UL)
-#define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN	(0x00000002UL)
-#define U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE	(0x00000003UL)
-/* Port X Interrupt Event Register 32bit (R/W) */
-#define U300_335_PXIEV					(0x08)
-/* Port X Interrupt Enable Register 32bit (R/W) */
-#define U300_335_PXIEN					(0x0C)
-/* Port X Interrupt Force Register 32bit (R/W) */
-#define U300_335_PXIFR					(0x10)
-/* Port X Interrupt Config Register 32bit (R/W) */
-#define U300_335_PXICR					(0x14)
-/* This register layout is the same in both blocks */
-#define U300_GPIO_PXICR_ALL_IRQ_CONFIG_MASK		(0x000000FFUL)
-#define U300_GPIO_PXICR_IRQ_CONFIG_MASK			(0x00000001UL)
-#define U300_GPIO_PXICR_IRQ_CONFIG_FALLING_EDGE		(0x00000000UL)
-#define U300_GPIO_PXICR_IRQ_CONFIG_RISING_EDGE		(0x00000001UL)
-/* Port X Pull-up Enable Register 32bit (R/W) */
-#define U300_335_PXPER					(0x18)
-/* This register layout is the same in both blocks */
-#define U300_GPIO_PXPER_ALL_PULL_UP_DISABLE_MASK	(0x000000FFUL)
-#define U300_GPIO_PXPER_PULL_UP_DISABLE			(0x00000001UL)
-/* Control Register 32bit (R/W) */
-#define U300_335_CR					(0x54)
-#define U300_335_CR_BLOCK_CLOCK_ENABLE			(0x00000001UL)
-
-/*
- * Register definitions for COH 901 571 / 3 variant
- */
-#define U300_571_PORT_STRIDE				(0x30)
-/*
- * Control Register 32bit (R/W)
- * bit 15-9 (mask 0x0000FE00) contains the number of cores. 8*cores
- * gives the number of GPIO pins.
- * bit 8-2  (mask 0x000001FC) contains the core version ID.
- */
-#define U300_571_CR					(0x00)
-#define U300_571_CR_SYNC_SEL_ENABLE			(0x00000002UL)
-#define U300_571_CR_BLOCK_CLKRQ_ENABLE			(0x00000001UL)
-/*
- * These registers have the same layout and function as the corresponding
- * COH 901 335 registers, just at different offset.
- */
-#define U300_571_PXPDIR					(0x04)
-#define U300_571_PXPDOR					(0x08)
-#define U300_571_PXPCR					(0x0C)
-#define U300_571_PXPER					(0x10)
-#define U300_571_PXIEV					(0x14)
-#define U300_571_PXIEN					(0x18)
-#define U300_571_PXIFR					(0x1C)
-#define U300_571_PXICR					(0x20)
-
-/* 8 bits per port, no version has more than 7 ports */
-#define U300_GPIO_PINS_PER_PORT 8
-#define U300_GPIO_MAX (U300_GPIO_PINS_PER_PORT * 7)
-
-struct u300_gpio {
-	struct gpio_chip chip;
-	struct list_head port_list;
-	struct clk *clk;
-	struct resource *memres;
-	void __iomem *base;
-	struct device *dev;
-	int irq_base;
-	u32 stride;
-	/* Register offsets */
-	u32 pcr;
-	u32 dor;
-	u32 dir;
-	u32 per;
-	u32 icr;
-	u32 ien;
-	u32 iev;
-};
-
-struct u300_gpio_port {
-	struct list_head node;
-	struct u300_gpio *gpio;
-	char name[8];
-	int irq;
-	int number;
-	u8 toggle_edge_mode;
-};
-
-/*
- * Macro to expand to read a specific register found in the "gpio"
- * struct. It requires the struct u300_gpio *gpio variable to exist in
- * its context. It calculates the port offset from the given pin
- * offset, muliplies by the port stride and adds the register offset
- * so it provides a pointer to the desired register.
- */
-#define U300_PIN_REG(pin, reg) \
-	(gpio->base + (pin >> 3) * gpio->stride + gpio->reg)
-
-/*
- * Provides a bitmask for a specific gpio pin inside an 8-bit GPIO
- * register.
- */
-#define U300_PIN_BIT(pin) \
-	(1 << (pin & 0x07))
-
-struct u300_gpio_confdata {
-	u16 bias_mode;
-	bool output;
-	int outval;
-};
-
-/* BS335 has seven ports of 8 bits each = GPIO pins 0..55 */
-#define BS335_GPIO_NUM_PORTS 7
-/* BS365 has five ports of 8 bits each = GPIO pins 0..39 */
-#define BS365_GPIO_NUM_PORTS 5
-
-#define U300_FLOATING_INPUT { \
-	.bias_mode = GPIO_U300_CONFIG_BIAS_FLOAT, \
-	.output = false, \
-}
-
-#define U300_PULL_UP_INPUT { \
-	.bias_mode = GPIO_U300_CONFIG_BIAS_PULL_UP, \
-	.output = false, \
-}
-
-#define U300_OUTPUT_LOW { \
-	.output = true, \
-	.outval = 0, \
-}
-
-#define U300_OUTPUT_HIGH { \
-	.output = true, \
-	.outval = 1, \
-}
-
-
-/* Initial configuration */
-static const struct __initdata u300_gpio_confdata
-bs335_gpio_config[BS335_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = {
-	/* Port 0, pins 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_HIGH,
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-	},
-	/* Port 1, pins 0-7 */
-	{
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_PULL_UP_INPUT,
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_HIGH,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-	},
-	/* Port 2, pins 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_LOW,
-		U300_PULL_UP_INPUT,
-		U300_OUTPUT_LOW,
-		U300_PULL_UP_INPUT,
-	},
-	/* Port 3, pins 0-7 */
-	{
-		U300_PULL_UP_INPUT,
-		U300_OUTPUT_LOW,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-	},
-	/* Port 4, pins 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-	},
-	/* Port 5, pins 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-	},
-	/* Port 6, pind 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-	}
-};
-
-static const struct __initdata u300_gpio_confdata
-bs365_gpio_config[BS365_GPIO_NUM_PORTS][U300_GPIO_PINS_PER_PORT] = {
-	/* Port 0, pins 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_LOW,
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_PULL_UP_INPUT,
-		U300_FLOATING_INPUT,
-	},
-	/* Port 1, pins 0-7 */
-	{
-		U300_OUTPUT_LOW,
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_LOW,
-		U300_FLOATING_INPUT,
-		U300_FLOATING_INPUT,
-		U300_OUTPUT_HIGH,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-	},
-	/* Port 2, pins 0-7 */
-	{
-		U300_FLOATING_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-	},
-	/* Port 3, pins 0-7 */
-	{
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-	},
-	/* Port 4, pins 0-7 */
-	{
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		U300_PULL_UP_INPUT,
-		/* These 4 pins doesn't exist on DB3210 */
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-		U300_OUTPUT_LOW,
-	}
-};
-
-/**
- * to_u300_gpio() - get the pointer to u300_gpio
- * @chip: the gpio chip member of the structure u300_gpio
- */
-static inline struct u300_gpio *to_u300_gpio(struct gpio_chip *chip)
-{
-	return container_of(chip, struct u300_gpio, chip);
-}
-
-static int u300_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
-	struct u300_gpio *gpio = to_u300_gpio(chip);
-
-	return readl(U300_PIN_REG(offset, dir)) & U300_PIN_BIT(offset);
-}
-
-static void u300_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-	struct u300_gpio *gpio = to_u300_gpio(chip);
-	unsigned long flags;
-	u32 val;
-
-	local_irq_save(flags);
-
-	val = readl(U300_PIN_REG(offset, dor));
-	if (value)
-		writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, dor));
-	else
-		writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, dor));
-
-	local_irq_restore(flags);
-}
-
-static int u300_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
-	struct u300_gpio *gpio = to_u300_gpio(chip);
-	unsigned long flags;
-	u32 val;
-
-	local_irq_save(flags);
-	val = readl(U300_PIN_REG(offset, pcr));
-	/* Mask out this pin, note 2 bits per setting */
-	val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK << ((offset & 0x07) << 1));
-	writel(val, U300_PIN_REG(offset, pcr));
-	local_irq_restore(flags);
-	return 0;
-}
-
-static int u300_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
-				      int value)
-{
-	struct u300_gpio *gpio = to_u300_gpio(chip);
-	unsigned long flags;
-	u32 oldmode;
-	u32 val;
-
-	local_irq_save(flags);
-	val = readl(U300_PIN_REG(offset, pcr));
-	/*
-	 * Drive mode must be set by the special mode set function, set
-	 * push/pull mode by default if no mode has been selected.
-	 */
-	oldmode = val & (U300_GPIO_PXPCR_PIN_MODE_MASK <<
-			 ((offset & 0x07) << 1));
-	/* mode = 0 means input, else some mode is already set */
-	if (oldmode == 0) {
-		val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK <<
-			 ((offset & 0x07) << 1));
-		val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL
-			<< ((offset & 0x07) << 1));
-		writel(val, U300_PIN_REG(offset, pcr));
-	}
-	u300_gpio_set(chip, offset, value);
-	local_irq_restore(flags);
-	return 0;
-}
-
-static int u300_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct u300_gpio *gpio = to_u300_gpio(chip);
-	int retirq = gpio->irq_base + offset;
-
-	dev_dbg(gpio->dev, "request IRQ for GPIO %d, return %d\n", offset,
-		retirq);
-	return retirq;
-}
-
-static int u300_gpio_config(struct gpio_chip *chip, unsigned offset,
-		     u16 param, unsigned long *data)
-{
-	struct u300_gpio *gpio = to_u300_gpio(chip);
-	unsigned long flags;
-	u32 val;
-
-	local_irq_save(flags);
-	switch (param) {
-	case GPIO_U300_CONFIG_BIAS_UNKNOWN:
-	case GPIO_U300_CONFIG_BIAS_FLOAT:
-		val = readl(U300_PIN_REG(offset, per));
-		writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, per));
-		break;
-	case GPIO_U300_CONFIG_BIAS_PULL_UP:
-		val = readl(U300_PIN_REG(offset, per));
-		writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, per));
-		break;
-	case GPIO_U300_CONFIG_DRIVE_PUSH_PULL:
-		val = readl(U300_PIN_REG(offset, pcr));
-		val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK
-			 << ((offset & 0x07) << 1));
-		val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_PUSH_PULL
-			<< ((offset & 0x07) << 1));
-		writel(val, U300_PIN_REG(offset, pcr));
-		break;
-	case GPIO_U300_CONFIG_DRIVE_OPEN_DRAIN:
-		val = readl(U300_PIN_REG(offset, pcr));
-		val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK
-			 << ((offset & 0x07) << 1));
-		val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_DRAIN
-			<< ((offset & 0x07) << 1));
-		writel(val, U300_PIN_REG(offset, pcr));
-		break;
-	case GPIO_U300_CONFIG_DRIVE_OPEN_SOURCE:
-		val = readl(U300_PIN_REG(offset, pcr));
-		val &= ~(U300_GPIO_PXPCR_PIN_MODE_MASK
-			 << ((offset & 0x07) << 1));
-		val |= (U300_GPIO_PXPCR_PIN_MODE_OUTPUT_OPEN_SOURCE
-			<< ((offset & 0x07) << 1));
-		writel(val, U300_PIN_REG(offset, pcr));
-		break;
-	default:
-		local_irq_restore(flags);
-		dev_err(gpio->dev, "illegal configuration requested\n");
-		return -EINVAL;
-	}
-	local_irq_restore(flags);
-	return 0;
-}
-
-static struct gpio_chip u300_gpio_chip = {
-	.label			= "u300-gpio-chip",
-	.owner			= THIS_MODULE,
-	.get			= u300_gpio_get,
-	.set			= u300_gpio_set,
-	.direction_input	= u300_gpio_direction_input,
-	.direction_output	= u300_gpio_direction_output,
-	.to_irq			= u300_gpio_to_irq,
-};
-
-static void u300_toggle_trigger(struct u300_gpio *gpio, unsigned offset)
-{
-	u32 val;
-
-	val = readl(U300_PIN_REG(offset, icr));
-	/* Set mode depending on state */
-	if (u300_gpio_get(&gpio->chip, offset)) {
-		/* High now, let's trigger on falling edge next then */
-		writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, icr));
-		dev_dbg(gpio->dev, "next IRQ on falling edge on pin %d\n",
-			offset);
-	} else {
-		/* Low now, let's trigger on rising edge next then */
-		writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, icr));
-		dev_dbg(gpio->dev, "next IRQ on rising edge on pin %d\n",
-			offset);
-	}
-}
-
-static int u300_gpio_irq_type(struct irq_data *d, unsigned trigger)
-{
-	struct u300_gpio_port *port = irq_data_get_irq_chip_data(d);
-	struct u300_gpio *gpio = port->gpio;
-	int offset = d->irq - gpio->irq_base;
-	u32 val;
-
-	if ((trigger & IRQF_TRIGGER_RISING) &&
-	    (trigger & IRQF_TRIGGER_FALLING)) {
-		/*
-		 * The GPIO block can only trigger on falling OR rising edges,
-		 * not both. So we need to toggle the mode whenever the pin
-		 * goes from one state to the other with a special state flag
-		 */
-		dev_dbg(gpio->dev,
-			"trigger on both rising and falling edge on pin %d\n",
-			offset);
-		port->toggle_edge_mode |= U300_PIN_BIT(offset);
-		u300_toggle_trigger(gpio, offset);
-	} else if (trigger & IRQF_TRIGGER_RISING) {
-		dev_dbg(gpio->dev, "trigger on rising edge on pin %d\n",
-			offset);
-		val = readl(U300_PIN_REG(offset, icr));
-		writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, icr));
-		port->toggle_edge_mode &= ~U300_PIN_BIT(offset);
-	} else if (trigger & IRQF_TRIGGER_FALLING) {
-		dev_dbg(gpio->dev, "trigger on falling edge on pin %d\n",
-			offset);
-		val = readl(U300_PIN_REG(offset, icr));
-		writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, icr));
-		port->toggle_edge_mode &= ~U300_PIN_BIT(offset);
-	}
-
-	return 0;
-}
-
-static void u300_gpio_irq_enable(struct irq_data *d)
-{
-	struct u300_gpio_port *port = irq_data_get_irq_chip_data(d);
-	struct u300_gpio *gpio = port->gpio;
-	int offset = d->irq - gpio->irq_base;
-	u32 val;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	val = readl(U300_PIN_REG(offset, ien));
-	writel(val | U300_PIN_BIT(offset), U300_PIN_REG(offset, ien));
-	local_irq_restore(flags);
-}
-
-static void u300_gpio_irq_disable(struct irq_data *d)
-{
-	struct u300_gpio_port *port = irq_data_get_irq_chip_data(d);
-	struct u300_gpio *gpio = port->gpio;
-	int offset = d->irq - gpio->irq_base;
-	u32 val;
-	unsigned long flags;
-
-	local_irq_save(flags);
-	val = readl(U300_PIN_REG(offset, ien));
-	writel(val & ~U300_PIN_BIT(offset), U300_PIN_REG(offset, ien));
-	local_irq_restore(flags);
-}
-
-static struct irq_chip u300_gpio_irqchip = {
-	.name			= "u300-gpio-irqchip",
-	.irq_enable		= u300_gpio_irq_enable,
-	.irq_disable		= u300_gpio_irq_disable,
-	.irq_set_type		= u300_gpio_irq_type,
-
-};
-
-static void u300_gpio_irq_handler(unsigned irq, struct irq_desc *desc)
-{
-	struct u300_gpio_port *port = irq_get_handler_data(irq);
-	struct u300_gpio *gpio = port->gpio;
-	int pinoffset = port->number << 3; /* get the right stride */
-	unsigned long val;
-
-	desc->irq_data.chip->irq_ack(&desc->irq_data);
-	/* Read event register */
-	val = readl(U300_PIN_REG(pinoffset, iev));
-	/* Mask relevant bits */
-	val &= 0xFFU; /* 8 bits per port */
-	/* ACK IRQ (clear event) */
-	writel(val, U300_PIN_REG(pinoffset, iev));
-
-	/* Call IRQ handler */
-	if (val != 0) {
-		int irqoffset;
-
-		for_each_set_bit(irqoffset, &val, U300_GPIO_PINS_PER_PORT) {
-			int pin_irq = gpio->irq_base + (port->number << 3)
-				+ irqoffset;
-			int offset = pinoffset + irqoffset;
-
-			dev_dbg(gpio->dev, "GPIO IRQ %d on pin %d\n",
-				pin_irq, offset);
-			generic_handle_irq(pin_irq);
-			/*
-			 * Triggering IRQ on both rising and falling edge
-			 * needs mockery
-			 */
-			if (port->toggle_edge_mode & U300_PIN_BIT(offset))
-				u300_toggle_trigger(gpio, offset);
-		}
-	}
-
-	desc->irq_data.chip->irq_unmask(&desc->irq_data);
-}
-
-static void __init u300_gpio_init_pin(struct u300_gpio *gpio,
-				      int offset,
-				      const struct u300_gpio_confdata *conf)
-{
-	/* Set mode: input or output */
-	if (conf->output) {
-		u300_gpio_direction_output(&gpio->chip, offset, conf->outval);
-
-		/* Deactivate bias mode for output */
-		u300_gpio_config(&gpio->chip, offset,
-				 GPIO_U300_CONFIG_BIAS_FLOAT,
-				 NULL);
-
-		/* Set drive mode for output */
-		u300_gpio_config(&gpio->chip, offset,
-				 GPIO_U300_CONFIG_DRIVE_PUSH_PULL, NULL);
-
-		dev_dbg(gpio->dev, "set up pin %d as output, value: %d\n",
-			offset, conf->outval);
-	} else {
-		u300_gpio_direction_input(&gpio->chip, offset);
-
-		/* Always set output low on input pins */
-		u300_gpio_set(&gpio->chip, offset, 0);
-
-		/* Set bias mode for input */
-		u300_gpio_config(&gpio->chip, offset, conf->bias_mode, NULL);
-
-		dev_dbg(gpio->dev, "set up pin %d as input, bias: %04x\n",
-			offset, conf->bias_mode);
-	}
-}
-
-static void __init u300_gpio_init_coh901571(struct u300_gpio *gpio,
-				     struct u300_gpio_platform *plat)
-{
-	int i, j;
-
-	/* Write default config and values to all pins */
-	for (i = 0; i < plat->ports; i++) {
-		for (j = 0; j < 8; j++) {
-			const struct u300_gpio_confdata *conf;
-			int offset = (i*8) + j;
-
-			if (plat->variant == U300_GPIO_COH901571_3_BS335)
-				conf = &bs335_gpio_config[i][j];
-			else if (plat->variant == U300_GPIO_COH901571_3_BS365)
-				conf = &bs365_gpio_config[i][j];
-			else
-				break;
-
-			u300_gpio_init_pin(gpio, offset, conf);
-		}
-	}
-}
-
-static inline void u300_gpio_free_ports(struct u300_gpio *gpio)
-{
-	struct u300_gpio_port *port;
-	struct list_head *p, *n;
-
-	list_for_each_safe(p, n, &gpio->port_list) {
-		port = list_entry(p, struct u300_gpio_port, node);
-		list_del(&port->node);
-		free_irq(port->irq, port);
-		kfree(port);
-	}
-}
-
-static int __init u300_gpio_probe(struct platform_device *pdev)
-{
-	struct u300_gpio_platform *plat = dev_get_platdata(&pdev->dev);
-	struct u300_gpio *gpio;
-	int err = 0;
-	int portno;
-	u32 val;
-	u32 ifr;
-	int i;
-
-	gpio = kzalloc(sizeof(struct u300_gpio), GFP_KERNEL);
-	if (gpio == NULL) {
-		dev_err(&pdev->dev, "failed to allocate memory\n");
-		return -ENOMEM;
-	}
-
-	gpio->chip = u300_gpio_chip;
-	gpio->chip.ngpio = plat->ports * U300_GPIO_PINS_PER_PORT;
-	gpio->irq_base = plat->gpio_irq_base;
-	gpio->chip.dev = &pdev->dev;
-	gpio->chip.base = plat->gpio_base;
-	gpio->dev = &pdev->dev;
-
-	/* Get GPIO clock */
-	gpio->clk = clk_get(gpio->dev, NULL);
-	if (IS_ERR(gpio->clk)) {
-		err = PTR_ERR(gpio->clk);
-		dev_err(gpio->dev, "could not get GPIO clock\n");
-		goto err_no_clk;
-	}
-	err = clk_enable(gpio->clk);
-	if (err) {
-		dev_err(gpio->dev, "could not enable GPIO clock\n");
-		goto err_no_clk_enable;
-	}
-
-	gpio->memres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!gpio->memres) {
-		dev_err(gpio->dev, "could not get GPIO memory resource\n");
-		err = -ENODEV;
-		goto err_no_resource;
-	}
-
-	if (!request_mem_region(gpio->memres->start,
-				resource_size(gpio->memres),
-				"GPIO Controller")) {
-		err = -ENODEV;
-		goto err_no_ioregion;
-	}
-
-	gpio->base = ioremap(gpio->memres->start, resource_size(gpio->memres));
-	if (!gpio->base) {
-		err = -ENOMEM;
-		goto err_no_ioremap;
-	}
-
-	if (plat->variant == U300_GPIO_COH901335) {
-		dev_info(gpio->dev,
-			 "initializing GPIO Controller COH 901 335\n");
-		gpio->stride = U300_335_PORT_STRIDE;
-		gpio->pcr = U300_335_PXPCR;
-		gpio->dor = U300_335_PXPDOR;
-		gpio->dir = U300_335_PXPDIR;
-		gpio->per = U300_335_PXPER;
-		gpio->icr = U300_335_PXICR;
-		gpio->ien = U300_335_PXIEN;
-		gpio->iev = U300_335_PXIEV;
-		ifr = U300_335_PXIFR;
-
-		/* Turn on the GPIO block */
-		writel(U300_335_CR_BLOCK_CLOCK_ENABLE,
-		       gpio->base + U300_335_CR);
-	} else if (plat->variant == U300_GPIO_COH901571_3_BS335 ||
-		   plat->variant == U300_GPIO_COH901571_3_BS365) {
-		dev_info(gpio->dev,
-			 "initializing GPIO Controller COH 901 571/3\n");
-		gpio->stride = U300_571_PORT_STRIDE;
-		gpio->pcr = U300_571_PXPCR;
-		gpio->dor = U300_571_PXPDOR;
-		gpio->dir = U300_571_PXPDIR;
-		gpio->per = U300_571_PXPER;
-		gpio->icr = U300_571_PXICR;
-		gpio->ien = U300_571_PXIEN;
-		gpio->iev = U300_571_PXIEV;
-		ifr = U300_571_PXIFR;
-
-		val = readl(gpio->base + U300_571_CR);
-		dev_info(gpio->dev, "COH901571/3 block version: %d, " \
-			 "number of cores: %d totalling %d pins\n",
-			 ((val & 0x000001FC) >> 2),
-			 ((val & 0x0000FE00) >> 9),
-			 ((val & 0x0000FE00) >> 9) * 8);
-		writel(U300_571_CR_BLOCK_CLKRQ_ENABLE,
-		       gpio->base + U300_571_CR);
-		u300_gpio_init_coh901571(gpio, plat);
-	} else {
-		dev_err(gpio->dev, "unknown block variant\n");
-		err = -ENODEV;
-		goto err_unknown_variant;
-	}
-
-	/* Add each port with its IRQ separately */
-	INIT_LIST_HEAD(&gpio->port_list);
-	for (portno = 0 ; portno < plat->ports; portno++) {
-		struct u300_gpio_port *port =
-			kmalloc(sizeof(struct u300_gpio_port), GFP_KERNEL);
-
-		if (!port) {
-			dev_err(gpio->dev, "out of memory\n");
-			err = -ENOMEM;
-			goto err_no_port;
-		}
-
-		snprintf(port->name, 8, "gpio%d", portno);
-		port->number = portno;
-		port->gpio = gpio;
-
-		port->irq = platform_get_irq_byname(pdev,
-						    port->name);
-
-		dev_dbg(gpio->dev, "register IRQ %d for %s\n", port->irq,
-			port->name);
-
-		irq_set_chained_handler(port->irq, u300_gpio_irq_handler);
-		irq_set_handler_data(port->irq, port);
-
-		/* For each GPIO pin set the unique IRQ handler */
-		for (i = 0; i < U300_GPIO_PINS_PER_PORT; i++) {
-			int irqno = gpio->irq_base + (portno << 3) + i;
-
-			dev_dbg(gpio->dev, "handler for IRQ %d on %s\n",
-				irqno, port->name);
-			irq_set_chip_and_handler(irqno, &u300_gpio_irqchip,
-						 handle_simple_irq);
-			set_irq_flags(irqno, IRQF_VALID);
-			irq_set_chip_data(irqno, port);
-		}
-
-		/* Turns off irq force (test register) for this port */
-		writel(0x0, gpio->base + portno * gpio->stride + ifr);
-
-		list_add_tail(&port->node, &gpio->port_list);
-	}
-	dev_dbg(gpio->dev, "initialized %d GPIO ports\n", portno);
-
-	err = gpiochip_add(&gpio->chip);
-	if (err) {
-		dev_err(gpio->dev, "unable to add gpiochip: %d\n", err);
-		goto err_no_chip;
-	}
-
-	platform_set_drvdata(pdev, gpio);
-
-	return 0;
-
-err_no_chip:
-err_no_port:
-	u300_gpio_free_ports(gpio);
-err_unknown_variant:
-	iounmap(gpio->base);
-err_no_ioremap:
-	release_mem_region(gpio->memres->start, resource_size(gpio->memres));
-err_no_ioregion:
-err_no_resource:
-	clk_disable(gpio->clk);
-err_no_clk_enable:
-	clk_put(gpio->clk);
-err_no_clk:
-	kfree(gpio);
-	dev_info(&pdev->dev, "module ERROR:%d\n", err);
-	return err;
-}
-
-static int __exit u300_gpio_remove(struct platform_device *pdev)
-{
-	struct u300_gpio_platform *plat = dev_get_platdata(&pdev->dev);
-	struct u300_gpio *gpio = platform_get_drvdata(pdev);
-	int err;
-
-	/* Turn off the GPIO block */
-	if (plat->variant == U300_GPIO_COH901335)
-		writel(0x00000000U, gpio->base + U300_335_CR);
-	if (plat->variant == U300_GPIO_COH901571_3_BS335 ||
-	    plat->variant == U300_GPIO_COH901571_3_BS365)
-		writel(0x00000000U, gpio->base + U300_571_CR);
-
-	err = gpiochip_remove(&gpio->chip);
-	if (err < 0) {
-		dev_err(gpio->dev, "unable to remove gpiochip: %d\n", err);
-		return err;
-	}
-	u300_gpio_free_ports(gpio);
-	iounmap(gpio->base);
-	release_mem_region(gpio->memres->start,
-			   resource_size(gpio->memres));
-	clk_disable(gpio->clk);
-	clk_put(gpio->clk);
-	platform_set_drvdata(pdev, NULL);
-	kfree(gpio);
-	return 0;
-}
-
-static struct platform_driver u300_gpio_driver = {
-	.driver		= {
-		.name	= "u300-gpio",
-	},
-	.remove		= __exit_p(u300_gpio_remove),
-};
-
-
-static int __init u300_gpio_init(void)
-{
-	return platform_driver_probe(&u300_gpio_driver, u300_gpio_probe);
-}
-
-static void __exit u300_gpio_exit(void)
-{
-	platform_driver_unregister(&u300_gpio_driver);
-}
-
-arch_initcall(u300_gpio_init);
-module_exit(u300_gpio_exit);
-
-MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
-MODULE_DESCRIPTION("ST-Ericsson AB COH 901 335/COH 901 571/3 GPIO driver");
-MODULE_LICENSE("GPL");