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, 233 deletions

diff --git a/drivers/gpio/xilinx_gpio.c b/drivers/gpio/xilinx_gpio.c
deleted file mode 100644
index 846fbd5e31bf..000000000000
--- a/drivers/gpio/xilinx_gpio.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
- * Xilinx gpio driver
- *
- * Copyright 2008 Xilinx, Inc.
- *
- * 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.
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
- */
-
-#include <linux/init.h>
-#include <linux/errno.h>
-#include <linux/of_device.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
-#include <linux/io.h>
-#include <linux/gpio.h>
-#include <linux/slab.h>
-
-/* Register Offset Definitions */
-#define XGPIO_DATA_OFFSET   (0x0)	/* Data register  */
-#define XGPIO_TRI_OFFSET    (0x4)	/* I/O direction register  */
-
-struct xgpio_instance {
-	struct of_mm_gpio_chip mmchip;
-	u32 gpio_state;		/* GPIO state shadow register */
-	u32 gpio_dir;		/* GPIO direction shadow register */
-	spinlock_t gpio_lock;	/* Lock used for synchronization */
-};
-
-/**
- * xgpio_get - Read the specified signal of the GPIO device.
- * @gc:     Pointer to gpio_chip device structure.
- * @gpio:   GPIO signal number.
- *
- * This function reads the specified signal of the GPIO device. It returns 0 if
- * the signal clear, 1 if signal is set or negative value on error.
- */
-static int xgpio_get(struct gpio_chip *gc, unsigned int gpio)
-{
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-
-	return (in_be32(mm_gc->regs + XGPIO_DATA_OFFSET) >> gpio) & 1;
-}
-
-/**
- * xgpio_set - Write the specified signal of the GPIO device.
- * @gc:     Pointer to gpio_chip device structure.
- * @gpio:   GPIO signal number.
- * @val:    Value to be written to specified signal.
- *
- * This function writes the specified value in to the specified signal of the
- * GPIO device.
- */
-static void xgpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	unsigned long flags;
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-	struct xgpio_instance *chip =
-	    container_of(mm_gc, struct xgpio_instance, mmchip);
-
-	spin_lock_irqsave(&chip->gpio_lock, flags);
-
-	/* Write to GPIO signal and set its direction to output */
-	if (val)
-		chip->gpio_state |= 1 << gpio;
-	else
-		chip->gpio_state &= ~(1 << gpio);
-	out_be32(mm_gc->regs + XGPIO_DATA_OFFSET, chip->gpio_state);
-
-	spin_unlock_irqrestore(&chip->gpio_lock, flags);
-}
-
-/**
- * xgpio_dir_in - Set the direction of the specified GPIO signal as input.
- * @gc:     Pointer to gpio_chip device structure.
- * @gpio:   GPIO signal number.
- *
- * This function sets the direction of specified GPIO signal as input.
- * It returns 0 if direction of GPIO signals is set as input otherwise it
- * returns negative error value.
- */
-static int xgpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
-{
-	unsigned long flags;
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-	struct xgpio_instance *chip =
-	    container_of(mm_gc, struct xgpio_instance, mmchip);
-
-	spin_lock_irqsave(&chip->gpio_lock, flags);
-
-	/* Set the GPIO bit in shadow register and set direction as input */
-	chip->gpio_dir |= (1 << gpio);
-	out_be32(mm_gc->regs + XGPIO_TRI_OFFSET, chip->gpio_dir);
-
-	spin_unlock_irqrestore(&chip->gpio_lock, flags);
-
-	return 0;
-}
-
-/**
- * xgpio_dir_out - Set the direction of the specified GPIO signal as output.
- * @gc:     Pointer to gpio_chip device structure.
- * @gpio:   GPIO signal number.
- * @val:    Value to be written to specified signal.
- *
- * This function sets the direction of specified GPIO signal as output. If all
- * GPIO signals of GPIO chip is configured as input then it returns
- * error otherwise it returns 0.
- */
-static int xgpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
-{
-	unsigned long flags;
-	struct of_mm_gpio_chip *mm_gc = to_of_mm_gpio_chip(gc);
-	struct xgpio_instance *chip =
-	    container_of(mm_gc, struct xgpio_instance, mmchip);
-
-	spin_lock_irqsave(&chip->gpio_lock, flags);
-
-	/* Write state of GPIO signal */
-	if (val)
-		chip->gpio_state |= 1 << gpio;
-	else
-		chip->gpio_state &= ~(1 << gpio);
-	out_be32(mm_gc->regs + XGPIO_DATA_OFFSET, chip->gpio_state);
-
-	/* Clear the GPIO bit in shadow register and set direction as output */
-	chip->gpio_dir &= (~(1 << gpio));
-	out_be32(mm_gc->regs + XGPIO_TRI_OFFSET, chip->gpio_dir);
-
-	spin_unlock_irqrestore(&chip->gpio_lock, flags);
-
-	return 0;
-}
-
-/**
- * xgpio_save_regs - Set initial values of GPIO pins
- * @mm_gc: pointer to memory mapped GPIO chip structure
- */
-static void xgpio_save_regs(struct of_mm_gpio_chip *mm_gc)
-{
-	struct xgpio_instance *chip =
-	    container_of(mm_gc, struct xgpio_instance, mmchip);
-
-	out_be32(mm_gc->regs + XGPIO_DATA_OFFSET, chip->gpio_state);
-	out_be32(mm_gc->regs + XGPIO_TRI_OFFSET, chip->gpio_dir);
-}
-
-/**
- * xgpio_of_probe - Probe method for the GPIO device.
- * @np: pointer to device tree node
- *
- * This function probes the GPIO device in the device tree. It initializes the
- * driver data structure. It returns 0, if the driver is bound to the GPIO
- * device, or a negative value if there is an error.
- */
-static int __devinit xgpio_of_probe(struct device_node *np)
-{
-	struct xgpio_instance *chip;
-	int status = 0;
-	const u32 *tree_info;
-
-	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
-	if (!chip)
-		return -ENOMEM;
-
-	/* Update GPIO state shadow register with default value */
-	tree_info = of_get_property(np, "xlnx,dout-default", NULL);
-	if (tree_info)
-		chip->gpio_state = be32_to_cpup(tree_info);
-
-	/* Update GPIO direction shadow register with default value */
-	chip->gpio_dir = 0xFFFFFFFF; /* By default, all pins are inputs */
-	tree_info = of_get_property(np, "xlnx,tri-default", NULL);
-	if (tree_info)
-		chip->gpio_dir = be32_to_cpup(tree_info);
-
-	/* Check device node and parent device node for device width */
-	chip->mmchip.gc.ngpio = 32; /* By default assume full GPIO controller */
-	tree_info = of_get_property(np, "xlnx,gpio-width", NULL);
-	if (!tree_info)
-		tree_info = of_get_property(np->parent,
-					    "xlnx,gpio-width", NULL);
-	if (tree_info)
-		chip->mmchip.gc.ngpio = be32_to_cpup(tree_info);
-
-	spin_lock_init(&chip->gpio_lock);
-
-	chip->mmchip.gc.direction_input = xgpio_dir_in;
-	chip->mmchip.gc.direction_output = xgpio_dir_out;
-	chip->mmchip.gc.get = xgpio_get;
-	chip->mmchip.gc.set = xgpio_set;
-
-	chip->mmchip.save_regs = xgpio_save_regs;
-
-	/* Call the OF gpio helper to setup and register the GPIO device */
-	status = of_mm_gpiochip_add(np, &chip->mmchip);
-	if (status) {
-		kfree(chip);
-		pr_err("%s: error in probe function with status %d\n",
-		       np->full_name, status);
-		return status;
-	}
-	pr_info("XGpio: %s: registered\n", np->full_name);
-	return 0;
-}
-
-static struct of_device_id xgpio_of_match[] __devinitdata = {
-	{ .compatible = "xlnx,xps-gpio-1.00.a", },
-	{ /* end of list */ },
-};
-
-static int __init xgpio_init(void)
-{
-	struct device_node *np;
-
-	for_each_matching_node(np, xgpio_of_match)
-		xgpio_of_probe(np);
-
-	return 0;
-}
-
-/* Make sure we get initialized before anyone else tries to use us */
-subsys_initcall(xgpio_init);
-/* No exit call at the moment as we cannot unregister of GPIO chips */
-
-MODULE_AUTHOR("Xilinx, Inc.");
-MODULE_DESCRIPTION("Xilinx GPIO driver");
-MODULE_LICENSE("GPL");