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, 401 deletions

diff --git a/drivers/gpio/cs5535-gpio.c b/drivers/gpio/cs5535-gpio.c
deleted file mode 100644
index 6e16cba56ad2..000000000000
--- a/drivers/gpio/cs5535-gpio.c
+++ /dev/null
@@ -1,401 +0,0 @@
-/*
- * AMD CS5535/CS5536 GPIO driver
- * Copyright (C) 2006  Advanced Micro Devices, Inc.
- * Copyright (C) 2007-2009  Andres Salomon <dilinger@collabora.co.uk>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public License
- * as published by the Free Software Foundation.
- */
-
-#include <linux/kernel.h>
-#include <linux/spinlock.h>
-#include <linux/module.h>
-#include <linux/platform_device.h>
-#include <linux/gpio.h>
-#include <linux/io.h>
-#include <linux/cs5535.h>
-#include <asm/msr.h>
-
-#define DRV_NAME "cs5535-gpio"
-
-/*
- * Some GPIO pins
- *  31-29,23 : reserved (always mask out)
- *  28       : Power Button
- *  26       : PME#
- *  22-16    : LPC
- *  14,15    : SMBus
- *  9,8      : UART1
- *  7        : PCI INTB
- *  3,4      : UART2/DDC
- *  2        : IDE_IRQ0
- *  1        : AC_BEEP
- *  0        : PCI INTA
- *
- * If a mask was not specified, allow all except
- * reserved and Power Button
- */
-#define GPIO_DEFAULT_MASK 0x0F7FFFFF
-
-static ulong mask = GPIO_DEFAULT_MASK;
-module_param_named(mask, mask, ulong, 0444);
-MODULE_PARM_DESC(mask, "GPIO channel mask.");
-
-static struct cs5535_gpio_chip {
-	struct gpio_chip chip;
-	resource_size_t base;
-
-	struct platform_device *pdev;
-	spinlock_t lock;
-} cs5535_gpio_chip;
-
-/*
- * The CS5535/CS5536 GPIOs support a number of extra features not defined
- * by the gpio_chip API, so these are exported.  For a full list of the
- * registers, see include/linux/cs5535.h.
- */
-
-static void errata_outl(struct cs5535_gpio_chip *chip, u32 val,
-		unsigned int reg)
-{
-	unsigned long addr = chip->base + 0x80 + reg;
-
-	/*
-	 * According to the CS5536 errata (#36), after suspend
-	 * a write to the high bank GPIO register will clear all
-	 * non-selected bits; the recommended workaround is a
-	 * read-modify-write operation.
-	 *
-	 * Don't apply this errata to the edge status GPIOs, as writing
-	 * to their lower bits will clear them.
-	 */
-	if (reg != GPIO_POSITIVE_EDGE_STS && reg != GPIO_NEGATIVE_EDGE_STS) {
-		if (val & 0xffff)
-			val |= (inl(addr) & 0xffff); /* ignore the high bits */
-		else
-			val |= (inl(addr) ^ (val >> 16));
-	}
-	outl(val, addr);
-}
-
-static void __cs5535_gpio_set(struct cs5535_gpio_chip *chip, unsigned offset,
-		unsigned int reg)
-{
-	if (offset < 16)
-		/* low bank register */
-		outl(1 << offset, chip->base + reg);
-	else
-		/* high bank register */
-		errata_outl(chip, 1 << (offset - 16), reg);
-}
-
-void cs5535_gpio_set(unsigned offset, unsigned int reg)
-{
-	struct cs5535_gpio_chip *chip = &cs5535_gpio_chip;
-	unsigned long flags;
-
-	spin_lock_irqsave(&chip->lock, flags);
-	__cs5535_gpio_set(chip, offset, reg);
-	spin_unlock_irqrestore(&chip->lock, flags);
-}
-EXPORT_SYMBOL_GPL(cs5535_gpio_set);
-
-static void __cs5535_gpio_clear(struct cs5535_gpio_chip *chip, unsigned offset,
-		unsigned int reg)
-{
-	if (offset < 16)
-		/* low bank register */
-		outl(1 << (offset + 16), chip->base + reg);
-	else
-		/* high bank register */
-		errata_outl(chip, 1 << offset, reg);
-}
-
-void cs5535_gpio_clear(unsigned offset, unsigned int reg)
-{
-	struct cs5535_gpio_chip *chip = &cs5535_gpio_chip;
-	unsigned long flags;
-
-	spin_lock_irqsave(&chip->lock, flags);
-	__cs5535_gpio_clear(chip, offset, reg);
-	spin_unlock_irqrestore(&chip->lock, flags);
-}
-EXPORT_SYMBOL_GPL(cs5535_gpio_clear);
-
-int cs5535_gpio_isset(unsigned offset, unsigned int reg)
-{
-	struct cs5535_gpio_chip *chip = &cs5535_gpio_chip;
-	unsigned long flags;
-	long val;
-
-	spin_lock_irqsave(&chip->lock, flags);
-	if (offset < 16)
-		/* low bank register */
-		val = inl(chip->base + reg);
-	else {
-		/* high bank register */
-		val = inl(chip->base + 0x80 + reg);
-		offset -= 16;
-	}
-	spin_unlock_irqrestore(&chip->lock, flags);
-
-	return (val & (1 << offset)) ? 1 : 0;
-}
-EXPORT_SYMBOL_GPL(cs5535_gpio_isset);
-
-int cs5535_gpio_set_irq(unsigned group, unsigned irq)
-{
-	uint32_t lo, hi;
-
-	if (group > 7 || irq > 15)
-		return -EINVAL;
-
-	rdmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
-
-	lo &= ~(0xF << (group * 4));
-	lo |= (irq & 0xF) << (group * 4);
-
-	wrmsr(MSR_PIC_ZSEL_HIGH, lo, hi);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(cs5535_gpio_set_irq);
-
-void cs5535_gpio_setup_event(unsigned offset, int pair, int pme)
-{
-	struct cs5535_gpio_chip *chip = &cs5535_gpio_chip;
-	uint32_t shift = (offset % 8) * 4;
-	unsigned long flags;
-	uint32_t val;
-
-	if (offset >= 24)
-		offset = GPIO_MAP_W;
-	else if (offset >= 16)
-		offset = GPIO_MAP_Z;
-	else if (offset >= 8)
-		offset = GPIO_MAP_Y;
-	else
-		offset = GPIO_MAP_X;
-
-	spin_lock_irqsave(&chip->lock, flags);
-	val = inl(chip->base + offset);
-
-	/* Clear whatever was there before */
-	val &= ~(0xF << shift);
-
-	/* Set the new value */
-	val |= ((pair & 7) << shift);
-
-	/* Set the PME bit if this is a PME event */
-	if (pme)
-		val |= (1 << (shift + 3));
-
-	outl(val, chip->base + offset);
-	spin_unlock_irqrestore(&chip->lock, flags);
-}
-EXPORT_SYMBOL_GPL(cs5535_gpio_setup_event);
-
-/*
- * Generic gpio_chip API support.
- */
-
-static int chip_gpio_request(struct gpio_chip *c, unsigned offset)
-{
-	struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c;
-	unsigned long flags;
-
-	spin_lock_irqsave(&chip->lock, flags);
-
-	/* check if this pin is available */
-	if ((mask & (1 << offset)) == 0) {
-		dev_info(&chip->pdev->dev,
-			"pin %u is not available (check mask)\n", offset);
-		spin_unlock_irqrestore(&chip->lock, flags);
-		return -EINVAL;
-	}
-
-	/* disable output aux 1 & 2 on this pin */
-	__cs5535_gpio_clear(chip, offset, GPIO_OUTPUT_AUX1);
-	__cs5535_gpio_clear(chip, offset, GPIO_OUTPUT_AUX2);
-
-	/* disable input aux 1 on this pin */
-	__cs5535_gpio_clear(chip, offset, GPIO_INPUT_AUX1);
-
-	spin_unlock_irqrestore(&chip->lock, flags);
-
-	return 0;
-}
-
-static int chip_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
-	return cs5535_gpio_isset(offset, GPIO_READ_BACK);
-}
-
-static void chip_gpio_set(struct gpio_chip *chip, unsigned offset, int val)
-{
-	if (val)
-		cs5535_gpio_set(offset, GPIO_OUTPUT_VAL);
-	else
-		cs5535_gpio_clear(offset, GPIO_OUTPUT_VAL);
-}
-
-static int chip_direction_input(struct gpio_chip *c, unsigned offset)
-{
-	struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c;
-	unsigned long flags;
-
-	spin_lock_irqsave(&chip->lock, flags);
-	__cs5535_gpio_set(chip, offset, GPIO_INPUT_ENABLE);
-	__cs5535_gpio_clear(chip, offset, GPIO_OUTPUT_ENABLE);
-	spin_unlock_irqrestore(&chip->lock, flags);
-
-	return 0;
-}
-
-static int chip_direction_output(struct gpio_chip *c, unsigned offset, int val)
-{
-	struct cs5535_gpio_chip *chip = (struct cs5535_gpio_chip *) c;
-	unsigned long flags;
-
-	spin_lock_irqsave(&chip->lock, flags);
-
-	__cs5535_gpio_set(chip, offset, GPIO_INPUT_ENABLE);
-	__cs5535_gpio_set(chip, offset, GPIO_OUTPUT_ENABLE);
-	if (val)
-		__cs5535_gpio_set(chip, offset, GPIO_OUTPUT_VAL);
-	else
-		__cs5535_gpio_clear(chip, offset, GPIO_OUTPUT_VAL);
-
-	spin_unlock_irqrestore(&chip->lock, flags);
-
-	return 0;
-}
-
-static const char * const cs5535_gpio_names[] = {
-	"GPIO0", "GPIO1", "GPIO2", "GPIO3",
-	"GPIO4", "GPIO5", "GPIO6", "GPIO7",
-	"GPIO8", "GPIO9", "GPIO10", "GPIO11",
-	"GPIO12", "GPIO13", "GPIO14", "GPIO15",
-	"GPIO16", "GPIO17", "GPIO18", "GPIO19",
-	"GPIO20", "GPIO21", "GPIO22", NULL,
-	"GPIO24", "GPIO25", "GPIO26", "GPIO27",
-	"GPIO28", NULL, NULL, NULL,
-};
-
-static struct cs5535_gpio_chip cs5535_gpio_chip = {
-	.chip = {
-		.owner = THIS_MODULE,
-		.label = DRV_NAME,
-
-		.base = 0,
-		.ngpio = 32,
-		.names = cs5535_gpio_names,
-		.request = chip_gpio_request,
-
-		.get = chip_gpio_get,
-		.set = chip_gpio_set,
-
-		.direction_input = chip_direction_input,
-		.direction_output = chip_direction_output,
-	},
-};
-
-static int __devinit cs5535_gpio_probe(struct platform_device *pdev)
-{
-	struct resource *res;
-	int err = -EIO;
-	ulong mask_orig = mask;
-
-	/* There are two ways to get the GPIO base address; one is by
-	 * fetching it from MSR_LBAR_GPIO, the other is by reading the
-	 * PCI BAR info.  The latter method is easier (especially across
-	 * different architectures), so we'll stick with that for now.  If
-	 * it turns out to be unreliable in the face of crappy BIOSes, we
-	 * can always go back to using MSRs.. */
-
-	res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "can't fetch device resource info\n");
-		goto done;
-	}
-
-	if (!request_region(res->start, resource_size(res), pdev->name)) {
-		dev_err(&pdev->dev, "can't request region\n");
-		goto done;
-	}
-
-	/* set up the driver-specific struct */
-	cs5535_gpio_chip.base = res->start;
-	cs5535_gpio_chip.pdev = pdev;
-	spin_lock_init(&cs5535_gpio_chip.lock);
-
-	dev_info(&pdev->dev, "reserved resource region %pR\n", res);
-
-	/* mask out reserved pins */
-	mask &= 0x1F7FFFFF;
-
-	/* do not allow pin 28, Power Button, as there's special handling
-	 * in the PMC needed. (note 12, p. 48) */
-	mask &= ~(1 << 28);
-
-	if (mask_orig != mask)
-		dev_info(&pdev->dev, "mask changed from 0x%08lX to 0x%08lX\n",
-				mask_orig, mask);
-
-	/* finally, register with the generic GPIO API */
-	err = gpiochip_add(&cs5535_gpio_chip.chip);
-	if (err)
-		goto release_region;
-
-	dev_info(&pdev->dev, "GPIO support successfully loaded.\n");
-	return 0;
-
-release_region:
-	release_region(res->start, resource_size(res));
-done:
-	return err;
-}
-
-static int __devexit cs5535_gpio_remove(struct platform_device *pdev)
-{
-	struct resource *r;
-	int err;
-
-	err = gpiochip_remove(&cs5535_gpio_chip.chip);
-	if (err) {
-		/* uhh? */
-		dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
-		return err;
-	}
-
-	r = platform_get_resource(pdev, IORESOURCE_IO, 0);
-	release_region(r->start, resource_size(r));
-	return 0;
-}
-
-static struct platform_driver cs5535_gpio_driver = {
-	.driver = {
-		.name = DRV_NAME,
-		.owner = THIS_MODULE,
-	},
-	.probe = cs5535_gpio_probe,
-	.remove = __devexit_p(cs5535_gpio_remove),
-};
-
-static int __init cs5535_gpio_init(void)
-{
-	return platform_driver_register(&cs5535_gpio_driver);
-}
-
-static void __exit cs5535_gpio_exit(void)
-{
-	platform_driver_unregister(&cs5535_gpio_driver);
-}
-
-module_init(cs5535_gpio_init);
-module_exit(cs5535_gpio_exit);
-
-MODULE_AUTHOR("Andres Salomon <dilinger@queued.net>");
-MODULE_DESCRIPTION("AMD CS5535/CS5536 GPIO driver");
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:" DRV_NAME);