gpio: reorganize drivers

Sort the gpio makefile and enforce the naming convention gpio-*.c for
gpio drivers.

v2: cleaned up filenames in Kconfig and comment blocks
v3: fixup use of BASIC_MMIO to GENERIC_GPIO for mxc

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>

1 files changed, 0 insertions, 379 deletions

diff --git a/drivers/gpio/timbgpio.c b/drivers/gpio/timbgpio.c
deleted file mode 100644
index 0265872e57d..00000000000
--- a/drivers/gpio/timbgpio.c
+++ /dev/null
@@ -1,379 +0,0 @@
-/*
- * timbgpio.c timberdale FPGA GPIO driver
- * Copyright (c) 2009 Intel Corporation
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-/* Supports:
- * Timberdale FPGA GPIO
- */
-
-#include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/platform_device.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/timb_gpio.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-
-#define DRIVER_NAME "timb-gpio"
-
-#define TGPIOVAL	0x00
-#define TGPIODIR	0x04
-#define TGPIO_IER	0x08
-#define TGPIO_ISR	0x0c
-#define TGPIO_IPR	0x10
-#define TGPIO_ICR	0x14
-#define TGPIO_FLR	0x18
-#define TGPIO_LVR	0x1c
-#define TGPIO_VER	0x20
-#define TGPIO_BFLR	0x24
-
-struct timbgpio {
-	void __iomem		*membase;
-	spinlock_t		lock; /* mutual exclusion */
-	struct gpio_chip	gpio;
-	int			irq_base;
-	unsigned long		last_ier;
-};
-
-static int timbgpio_update_bit(struct gpio_chip *gpio, unsigned index,
-	unsigned offset, bool enabled)
-{
-	struct timbgpio *tgpio = container_of(gpio, struct timbgpio, gpio);
-	u32 reg;
-
-	spin_lock(&tgpio->lock);
-	reg = ioread32(tgpio->membase + offset);
-
-	if (enabled)
-		reg |= (1 << index);
-	else
-		reg &= ~(1 << index);
-
-	iowrite32(reg, tgpio->membase + offset);
-	spin_unlock(&tgpio->lock);
-
-	return 0;
-}
-
-static int timbgpio_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
-{
-	return timbgpio_update_bit(gpio, nr, TGPIODIR, true);
-}
-
-static int timbgpio_gpio_get(struct gpio_chip *gpio, unsigned nr)
-{
-	struct timbgpio *tgpio = container_of(gpio, struct timbgpio, gpio);
-	u32 value;
-
-	value = ioread32(tgpio->membase + TGPIOVAL);
-	return (value & (1 << nr)) ? 1 : 0;
-}
-
-static int timbgpio_gpio_direction_output(struct gpio_chip *gpio,
-						unsigned nr, int val)
-{
-	return timbgpio_update_bit(gpio, nr, TGPIODIR, false);
-}
-
-static void timbgpio_gpio_set(struct gpio_chip *gpio,
-				unsigned nr, int val)
-{
-	timbgpio_update_bit(gpio, nr, TGPIOVAL, val != 0);
-}
-
-static int timbgpio_to_irq(struct gpio_chip *gpio, unsigned offset)
-{
-	struct timbgpio *tgpio = container_of(gpio, struct timbgpio, gpio);
-
-	if (tgpio->irq_base <= 0)
-		return -EINVAL;
-
-	return tgpio->irq_base + offset;
-}
-
-/*
- * GPIO IRQ
- */
-static void timbgpio_irq_disable(struct irq_data *d)
-{
-	struct timbgpio *tgpio = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - tgpio->irq_base;
-	unsigned long flags;
-
-	spin_lock_irqsave(&tgpio->lock, flags);
-	tgpio->last_ier &= ~(1 << offset);
-	iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
-	spin_unlock_irqrestore(&tgpio->lock, flags);
-}
-
-static void timbgpio_irq_enable(struct irq_data *d)
-{
-	struct timbgpio *tgpio = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - tgpio->irq_base;
-	unsigned long flags;
-
-	spin_lock_irqsave(&tgpio->lock, flags);
-	tgpio->last_ier |= 1 << offset;
-	iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
-	spin_unlock_irqrestore(&tgpio->lock, flags);
-}
-
-static int timbgpio_irq_type(struct irq_data *d, unsigned trigger)
-{
-	struct timbgpio *tgpio = irq_data_get_irq_chip_data(d);
-	int offset = d->irq - tgpio->irq_base;
-	unsigned long flags;
-	u32 lvr, flr, bflr = 0;
-	u32 ver;
-	int ret = 0;
-
-	if (offset < 0 || offset > tgpio->gpio.ngpio)
-		return -EINVAL;
-
-	ver = ioread32(tgpio->membase + TGPIO_VER);
-
-	spin_lock_irqsave(&tgpio->lock, flags);
-
-	lvr = ioread32(tgpio->membase + TGPIO_LVR);
-	flr = ioread32(tgpio->membase + TGPIO_FLR);
-	if (ver > 2)
-		bflr = ioread32(tgpio->membase + TGPIO_BFLR);
-
-	if (trigger & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
-		bflr &= ~(1 << offset);
-		flr &= ~(1 << offset);
-		if (trigger & IRQ_TYPE_LEVEL_HIGH)
-			lvr |= 1 << offset;
-		else
-			lvr &= ~(1 << offset);
-	}
-
-	if ((trigger & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) {
-		if (ver < 3) {
-			ret = -EINVAL;
-			goto out;
-		}
-		else {
-			flr |= 1 << offset;
-			bflr |= 1 << offset;
-		}
-	} else {
-		bflr &= ~(1 << offset);
-		flr |= 1 << offset;
-		if (trigger & IRQ_TYPE_EDGE_FALLING)
-			lvr &= ~(1 << offset);
-		else
-			lvr |= 1 << offset;
-	}
-
-	iowrite32(lvr, tgpio->membase + TGPIO_LVR);
-	iowrite32(flr, tgpio->membase + TGPIO_FLR);
-	if (ver > 2)
-		iowrite32(bflr, tgpio->membase + TGPIO_BFLR);
-
-	iowrite32(1 << offset, tgpio->membase + TGPIO_ICR);
-
-out:
-	spin_unlock_irqrestore(&tgpio->lock, flags);
-	return ret;
-}
-
-static void timbgpio_irq(unsigned int irq, struct irq_desc *desc)
-{
-	struct timbgpio *tgpio = irq_get_handler_data(irq);
-	unsigned long ipr;
-	int offset;
-
-	desc->irq_data.chip->irq_ack(irq_get_irq_data(irq));
-	ipr = ioread32(tgpio->membase + TGPIO_IPR);
-	iowrite32(ipr, tgpio->membase + TGPIO_ICR);
-
-	/*
-	 * Some versions of the hardware trash the IER register if more than
-	 * one interrupt is received simultaneously.
-	 */
-	iowrite32(0, tgpio->membase + TGPIO_IER);
-
-	for_each_set_bit(offset, &ipr, tgpio->gpio.ngpio)
-		generic_handle_irq(timbgpio_to_irq(&tgpio->gpio, offset));
-
-	iowrite32(tgpio->last_ier, tgpio->membase + TGPIO_IER);
-}
-
-static struct irq_chip timbgpio_irqchip = {
-	.name		= "GPIO",
-	.irq_enable	= timbgpio_irq_enable,
-	.irq_disable	= timbgpio_irq_disable,
-	.irq_set_type	= timbgpio_irq_type,
-};
-
-static int __devinit timbgpio_probe(struct platform_device *pdev)
-{
-	int err, i;
-	struct gpio_chip *gc;
-	struct timbgpio *tgpio;
-	struct resource *iomem;
-	struct timbgpio_platform_data *pdata = pdev->dev.platform_data;
-	int irq = platform_get_irq(pdev, 0);
-
-	if (!pdata || pdata->nr_pins > 32) {
-		err = -EINVAL;
-		goto err_mem;
-	}
-
-	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!iomem) {
-		err = -EINVAL;
-		goto err_mem;
-	}
-
-	tgpio = kzalloc(sizeof(*tgpio), GFP_KERNEL);
-	if (!tgpio) {
-		err = -EINVAL;
-		goto err_mem;
-	}
-	tgpio->irq_base = pdata->irq_base;
-
-	spin_lock_init(&tgpio->lock);
-
-	if (!request_mem_region(iomem->start, resource_size(iomem),
-		DRIVER_NAME)) {
-		err = -EBUSY;
-		goto err_request;
-	}
-
-	tgpio->membase = ioremap(iomem->start, resource_size(iomem));
-	if (!tgpio->membase) {
-		err = -ENOMEM;
-		goto err_ioremap;
-	}
-
-	gc = &tgpio->gpio;
-
-	gc->label = dev_name(&pdev->dev);
-	gc->owner = THIS_MODULE;
-	gc->dev = &pdev->dev;
-	gc->direction_input = timbgpio_gpio_direction_input;
-	gc->get = timbgpio_gpio_get;
-	gc->direction_output = timbgpio_gpio_direction_output;
-	gc->set = timbgpio_gpio_set;
-	gc->to_irq = (irq >= 0 && tgpio->irq_base > 0) ? timbgpio_to_irq : NULL;
-	gc->dbg_show = NULL;
-	gc->base = pdata->gpio_base;
-	gc->ngpio = pdata->nr_pins;
-	gc->can_sleep = 0;
-
-	err = gpiochip_add(gc);
-	if (err)
-		goto err_chipadd;
-
-	platform_set_drvdata(pdev, tgpio);
-
-	/* make sure to disable interrupts */
-	iowrite32(0x0, tgpio->membase + TGPIO_IER);
-
-	if (irq < 0 || tgpio->irq_base <= 0)
-		return 0;
-
-	for (i = 0; i < pdata->nr_pins; i++) {
-		irq_set_chip_and_handler_name(tgpio->irq_base + i,
-			&timbgpio_irqchip, handle_simple_irq, "mux");
-		irq_set_chip_data(tgpio->irq_base + i, tgpio);
-#ifdef CONFIG_ARM
-		set_irq_flags(tgpio->irq_base + i, IRQF_VALID | IRQF_PROBE);
-#endif
-	}
-
-	irq_set_handler_data(irq, tgpio);
-	irq_set_chained_handler(irq, timbgpio_irq);
-
-	return 0;
-
-err_chipadd:
-	iounmap(tgpio->membase);
-err_ioremap:
-	release_mem_region(iomem->start, resource_size(iomem));
-err_request:
-	kfree(tgpio);
-err_mem:
-	printk(KERN_ERR DRIVER_NAME": Failed to register GPIOs: %d\n", err);
-
-	return err;
-}
-
-static int __devexit timbgpio_remove(struct platform_device *pdev)
-{
-	int err;
-	struct timbgpio_platform_data *pdata = pdev->dev.platform_data;
-	struct timbgpio *tgpio = platform_get_drvdata(pdev);
-	struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	int irq = platform_get_irq(pdev, 0);
-
-	if (irq >= 0 && tgpio->irq_base > 0) {
-		int i;
-		for (i = 0; i < pdata->nr_pins; i++) {
-			irq_set_chip(tgpio->irq_base + i, NULL);
-			irq_set_chip_data(tgpio->irq_base + i, NULL);
-		}
-
-		irq_set_handler(irq, NULL);
-		irq_set_handler_data(irq, NULL);
-	}
-
-	err = gpiochip_remove(&tgpio->gpio);
-	if (err)
-		printk(KERN_ERR DRIVER_NAME": failed to remove gpio_chip\n");
-
-	iounmap(tgpio->membase);
-	release_mem_region(iomem->start, resource_size(iomem));
-	kfree(tgpio);
-
-	platform_set_drvdata(pdev, NULL);
-
-	return 0;
-}
-
-static struct platform_driver timbgpio_platform_driver = {
-	.driver = {
-		.name	= DRIVER_NAME,
-		.owner	= THIS_MODULE,
-	},
-	.probe		= timbgpio_probe,
-	.remove		= timbgpio_remove,
-};
-
-/*--------------------------------------------------------------------------*/
-
-static int __init timbgpio_init(void)
-{
-	return platform_driver_register(&timbgpio_platform_driver);
-}
-
-static void __exit timbgpio_exit(void)
-{
-	platform_driver_unregister(&timbgpio_platform_driver);
-}
-
-module_init(timbgpio_init);
-module_exit(timbgpio_exit);
-
-MODULE_DESCRIPTION("Timberdale GPIO driver");
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("Mocean Laboratories");
-MODULE_ALIAS("platform:"DRIVER_NAME);
-