Merge branch 'depends/rmk/gpio' into next/fixes

This sorts out merge conflicts with the arm/gpio branch that
already got merged into mainline Linux.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

4 files changed, 47 insertions, 376 deletions

diff --git a/arch/arm/plat-pxa/Makefile b/arch/arm/plat-pxa/Makefile
index 3aca5ba..f302d04 100644
--- a/arch/arm/plat-pxa/Makefile
+++ b/arch/arm/plat-pxa/Makefile
@@ -4,7 +4,6 @@
 
 obj-y	:= dma.o
 
-obj-$(CONFIG_GENERIC_GPIO)	+= gpio.o
 obj-$(CONFIG_PXA3xx)		+= mfp.o
 obj-$(CONFIG_PXA95x)		+= mfp.o
 obj-$(CONFIG_ARCH_MMP)		+= mfp.o
diff --git a/arch/arm/plat-pxa/gpio.c b/arch/arm/plat-pxa/gpio.c
deleted file mode 100644
index 0db7615..0000000
--- a/arch/arm/plat-pxa/gpio.c
+++ /dev/null
@@ -1,338 +0,0 @@
-/*
- *  linux/arch/arm/plat-pxa/gpio.c
- *
- *  Generic PXA GPIO handling
- *
- *  Author:	Nicolas Pitre
- *  Created:	Jun 15, 2001
- *  Copyright:	MontaVista Software 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.
- */
-
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/syscore_ops.h>
-#include <linux/slab.h>
-
-#include <mach/gpio.h>
-
-int pxa_last_gpio;
-
-struct pxa_gpio_chip {
-	struct gpio_chip chip;
-	void __iomem	*regbase;
-	char label[10];
-
-	unsigned long	irq_mask;
-	unsigned long	irq_edge_rise;
-	unsigned long	irq_edge_fall;
-
-#ifdef CONFIG_PM
-	unsigned long	saved_gplr;
-	unsigned long	saved_gpdr;
-	unsigned long	saved_grer;
-	unsigned long	saved_gfer;
-#endif
-};
-
-static DEFINE_SPINLOCK(gpio_lock);
-static struct pxa_gpio_chip *pxa_gpio_chips;
-
-#define for_each_gpio_chip(i, c)			\
-	for (i = 0, c = &pxa_gpio_chips[0]; i <= pxa_last_gpio; i += 32, c++)
-
-static inline void __iomem *gpio_chip_base(struct gpio_chip *c)
-{
-	return container_of(c, struct pxa_gpio_chip, chip)->regbase;
-}
-
-static inline struct pxa_gpio_chip *gpio_to_pxachip(unsigned gpio)
-{
-	return &pxa_gpio_chips[gpio_to_bank(gpio)];
-}
-
-static int pxa_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
-	void __iomem *base = gpio_chip_base(chip);
-	uint32_t value, mask = 1 << offset;
-	unsigned long flags;
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	value = __raw_readl(base + GPDR_OFFSET);
-	if (__gpio_is_inverted(chip->base + offset))
-		value |= mask;
-	else
-		value &= ~mask;
-	__raw_writel(value, base + GPDR_OFFSET);
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-	return 0;
-}
-
-static int pxa_gpio_direction_output(struct gpio_chip *chip,
-				     unsigned offset, int value)
-{
-	void __iomem *base = gpio_chip_base(chip);
-	uint32_t tmp, mask = 1 << offset;
-	unsigned long flags;
-
-	__raw_writel(mask, base + (value ? GPSR_OFFSET : GPCR_OFFSET));
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	tmp = __raw_readl(base + GPDR_OFFSET);
-	if (__gpio_is_inverted(chip->base + offset))
-		tmp &= ~mask;
-	else
-		tmp |= mask;
-	__raw_writel(tmp, base + GPDR_OFFSET);
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-	return 0;
-}
-
-static int pxa_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
-	return __raw_readl(gpio_chip_base(chip) + GPLR_OFFSET) & (1 << offset);
-}
-
-static void pxa_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
-	__raw_writel(1 << offset, gpio_chip_base(chip) +
-				(value ? GPSR_OFFSET : GPCR_OFFSET));
-}
-
-static int __init pxa_init_gpio_chip(int gpio_end)
-{
-	int i, gpio, nbanks = gpio_to_bank(gpio_end) + 1;
-	struct pxa_gpio_chip *chips;
-
-	chips = kzalloc(nbanks * sizeof(struct pxa_gpio_chip), GFP_KERNEL);
-	if (chips == NULL) {
-		pr_err("%s: failed to allocate GPIO chips\n", __func__);
-		return -ENOMEM;
-	}
-
-	for (i = 0, gpio = 0; i < nbanks; i++, gpio += 32) {
-		struct gpio_chip *c = &chips[i].chip;
-
-		sprintf(chips[i].label, "gpio-%d", i);
-		chips[i].regbase = GPIO_BANK(i);
-
-		c->base  = gpio;
-		c->label = chips[i].label;
-
-		c->direction_input  = pxa_gpio_direction_input;
-		c->direction_output = pxa_gpio_direction_output;
-		c->get = pxa_gpio_get;
-		c->set = pxa_gpio_set;
-
-		/* number of GPIOs on last bank may be less than 32 */
-		c->ngpio = (gpio + 31 > gpio_end) ? (gpio_end - gpio + 1) : 32;
-		gpiochip_add(c);
-	}
-	pxa_gpio_chips = chips;
-	return 0;
-}
-
-/* Update only those GRERx and GFERx edge detection register bits if those
- * bits are set in c->irq_mask
- */
-static inline void update_edge_detect(struct pxa_gpio_chip *c)
-{
-	uint32_t grer, gfer;
-
-	grer = __raw_readl(c->regbase + GRER_OFFSET) & ~c->irq_mask;
-	gfer = __raw_readl(c->regbase + GFER_OFFSET) & ~c->irq_mask;
-	grer |= c->irq_edge_rise & c->irq_mask;
-	gfer |= c->irq_edge_fall & c->irq_mask;
-	__raw_writel(grer, c->regbase + GRER_OFFSET);
-	__raw_writel(gfer, c->regbase + GFER_OFFSET);
-}
-
-static int pxa_gpio_irq_type(struct irq_data *d, unsigned int type)
-{
-	struct pxa_gpio_chip *c;
-	int gpio = irq_to_gpio(d->irq);
-	unsigned long gpdr, mask = GPIO_bit(gpio);
-
-	c = gpio_to_pxachip(gpio);
-
-	if (type == IRQ_TYPE_PROBE) {
-		/* Don't mess with enabled GPIOs using preconfigured edges or
-		 * GPIOs set to alternate function or to output during probe
-		 */
-		if ((c->irq_edge_rise | c->irq_edge_fall) & GPIO_bit(gpio))
-			return 0;
-
-		if (__gpio_is_occupied(gpio))
-			return 0;
-
-		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
-	}
-
-	gpdr = __raw_readl(c->regbase + GPDR_OFFSET);
-
-	if (__gpio_is_inverted(gpio))
-		__raw_writel(gpdr | mask,  c->regbase + GPDR_OFFSET);
-	else
-		__raw_writel(gpdr & ~mask, c->regbase + GPDR_OFFSET);
-
-	if (type & IRQ_TYPE_EDGE_RISING)
-		c->irq_edge_rise |= mask;
-	else
-		c->irq_edge_rise &= ~mask;
-
-	if (type & IRQ_TYPE_EDGE_FALLING)
-		c->irq_edge_fall |= mask;
-	else
-		c->irq_edge_fall &= ~mask;
-
-	update_edge_detect(c);
-
-	pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, d->irq, gpio,
-		((type & IRQ_TYPE_EDGE_RISING)  ? " rising"  : ""),
-		((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
-	return 0;
-}
-
-static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
-{
-	struct pxa_gpio_chip *c;
-	int loop, gpio, gpio_base, n;
-	unsigned long gedr;
-
-	do {
-		loop = 0;
-		for_each_gpio_chip(gpio, c) {
-			gpio_base = c->chip.base;
-
-			gedr = __raw_readl(c->regbase + GEDR_OFFSET);
-			gedr = gedr & c->irq_mask;
-			__raw_writel(gedr, c->regbase + GEDR_OFFSET);
-
-			n = find_first_bit(&gedr, BITS_PER_LONG);
-			while (n < BITS_PER_LONG) {
-				loop = 1;
-
-				generic_handle_irq(gpio_to_irq(gpio_base + n));
-				n = find_next_bit(&gedr, BITS_PER_LONG, n + 1);
-			}
-		}
-	} while (loop);
-}
-
-static void pxa_ack_muxed_gpio(struct irq_data *d)
-{
-	int gpio = irq_to_gpio(d->irq);
-	struct pxa_gpio_chip *c = gpio_to_pxachip(gpio);
-
-	__raw_writel(GPIO_bit(gpio), c->regbase + GEDR_OFFSET);
-}
-
-static void pxa_mask_muxed_gpio(struct irq_data *d)
-{
-	int gpio = irq_to_gpio(d->irq);
-	struct pxa_gpio_chip *c = gpio_to_pxachip(gpio);
-	uint32_t grer, gfer;
-
-	c->irq_mask &= ~GPIO_bit(gpio);
-
-	grer = __raw_readl(c->regbase + GRER_OFFSET) & ~GPIO_bit(gpio);
-	gfer = __raw_readl(c->regbase + GFER_OFFSET) & ~GPIO_bit(gpio);
-	__raw_writel(grer, c->regbase + GRER_OFFSET);
-	__raw_writel(gfer, c->regbase + GFER_OFFSET);
-}
-
-static void pxa_unmask_muxed_gpio(struct irq_data *d)
-{
-	int gpio = irq_to_gpio(d->irq);
-	struct pxa_gpio_chip *c = gpio_to_pxachip(gpio);
-
-	c->irq_mask |= GPIO_bit(gpio);
-	update_edge_detect(c);
-}
-
-static struct irq_chip pxa_muxed_gpio_chip = {
-	.name		= "GPIO",
-	.irq_ack	= pxa_ack_muxed_gpio,
-	.irq_mask	= pxa_mask_muxed_gpio,
-	.irq_unmask	= pxa_unmask_muxed_gpio,
-	.irq_set_type	= pxa_gpio_irq_type,
-};
-
-void __init pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn)
-{
-	struct pxa_gpio_chip *c;
-	int gpio, irq;
-
-	pxa_last_gpio = end;
-
-	/* Initialize GPIO chips */
-	pxa_init_gpio_chip(end);
-
-	/* clear all GPIO edge detects */
-	for_each_gpio_chip(gpio, c) {
-		__raw_writel(0, c->regbase + GFER_OFFSET);
-		__raw_writel(0, c->regbase + GRER_OFFSET);
-		__raw_writel(~0,c->regbase + GEDR_OFFSET);
-	}
-
-	for (irq  = gpio_to_irq(start); irq <= gpio_to_irq(end); irq++) {
-		irq_set_chip_and_handler(irq, &pxa_muxed_gpio_chip,
-					 handle_edge_irq);
-		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-	}
-
-	/* Install handler for GPIO>=2 edge detect interrupts */
-	irq_set_chained_handler(mux_irq, pxa_gpio_demux_handler);
-	pxa_muxed_gpio_chip.irq_set_wake = fn;
-}
-
-#ifdef CONFIG_PM
-static int pxa_gpio_suspend(void)
-{
-	struct pxa_gpio_chip *c;
-	int gpio;
-
-	for_each_gpio_chip(gpio, c) {
-		c->saved_gplr = __raw_readl(c->regbase + GPLR_OFFSET);
-		c->saved_gpdr = __raw_readl(c->regbase + GPDR_OFFSET);
-		c->saved_grer = __raw_readl(c->regbase + GRER_OFFSET);
-		c->saved_gfer = __raw_readl(c->regbase + GFER_OFFSET);
-
-		/* Clear GPIO transition detect bits */
-		__raw_writel(0xffffffff, c->regbase + GEDR_OFFSET);
-	}
-	return 0;
-}
-
-static void pxa_gpio_resume(void)
-{
-	struct pxa_gpio_chip *c;
-	int gpio;
-
-	for_each_gpio_chip(gpio, c) {
-		/* restore level with set/clear */
-		__raw_writel( c->saved_gplr, c->regbase + GPSR_OFFSET);
-		__raw_writel(~c->saved_gplr, c->regbase + GPCR_OFFSET);
-
-		__raw_writel(c->saved_grer, c->regbase + GRER_OFFSET);
-		__raw_writel(c->saved_gfer, c->regbase + GFER_OFFSET);
-		__raw_writel(c->saved_gpdr, c->regbase + GPDR_OFFSET);
-	}
-}
-#else
-#define pxa_gpio_suspend	NULL
-#define pxa_gpio_resume		NULL
-#endif
-
-struct syscore_ops pxa_gpio_syscore_ops = {
-	.suspend	= pxa_gpio_suspend,
-	.resume		= pxa_gpio_resume,
-};
diff --git a/arch/arm/plat-pxa/include/plat/gpio-pxa.h b/arch/arm/plat-pxa/include/plat/gpio-pxa.h
new file mode 100644
index 0000000..b6390be
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/gpio-pxa.h
@@ -0,0 +1,44 @@
+#ifndef __PLAT_PXA_GPIO_H
+#define __PLAT_PXA_GPIO_H
+
+struct irq_data;
+
+/*
+ * We handle the GPIOs by banks, each bank covers up to 32 GPIOs with
+ * one set of registers. The register offsets are organized below:
+ *
+ *           GPLR    GPDR    GPSR    GPCR    GRER    GFER    GEDR
+ * BANK 0 - 0x0000  0x000C  0x0018  0x0024  0x0030  0x003C  0x0048
+ * BANK 1 - 0x0004  0x0010  0x001C  0x0028  0x0034  0x0040  0x004C
+ * BANK 2 - 0x0008  0x0014  0x0020  0x002C  0x0038  0x0044  0x0050
+ *
+ * BANK 3 - 0x0100  0x010C  0x0118  0x0124  0x0130  0x013C  0x0148
+ * BANK 4 - 0x0104  0x0110  0x011C  0x0128  0x0134  0x0140  0x014C
+ * BANK 5 - 0x0108  0x0114  0x0120  0x012C  0x0138  0x0144  0x0150
+ *
+ * NOTE:
+ *   BANK 3 is only available on PXA27x and later processors.
+ *   BANK 4 and 5 are only available on PXA935
+ */
+
+#define GPIO_BANK(n)	(GPIO_REGS_VIRT + BANK_OFF(n))
+
+#define GPLR_OFFSET	0x00
+#define GPDR_OFFSET	0x0C
+#define GPSR_OFFSET	0x18
+#define GPCR_OFFSET	0x24
+#define GRER_OFFSET	0x30
+#define GFER_OFFSET	0x3C
+#define GEDR_OFFSET	0x48
+
+/* NOTE: some PXAs have fewer on-chip GPIOs (like PXA255, with 85).
+ * Those cases currently cause holes in the GPIO number space, the
+ * actual number of the last GPIO is recorded by 'pxa_last_gpio'.
+ */
+extern int pxa_last_gpio;
+
+typedef int (*set_wake_t)(struct irq_data *d, unsigned int on);
+
+extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn);
+
+#endif /* __PLAT_PXA_GPIO_H */
diff --git a/arch/arm/plat-pxa/include/plat/gpio.h b/arch/arm/plat-pxa/include/plat/gpio.h
index 1ddd2b9..258f772 100644
--- a/arch/arm/plat-pxa/include/plat/gpio.h
+++ b/arch/arm/plat-pxa/include/plat/gpio.h
@@ -1,35 +1,10 @@
 #ifndef __PLAT_GPIO_H
 #define __PLAT_GPIO_H
 
-struct irq_data;
+#define __ARM_GPIOLIB_COMPLEX
 
-/*
- * We handle the GPIOs by banks, each bank covers up to 32 GPIOs with
- * one set of registers. The register offsets are organized below:
- *
- *           GPLR    GPDR    GPSR    GPCR    GRER    GFER    GEDR
- * BANK 0 - 0x0000  0x000C  0x0018  0x0024  0x0030  0x003C  0x0048
- * BANK 1 - 0x0004  0x0010  0x001C  0x0028  0x0034  0x0040  0x004C
- * BANK 2 - 0x0008  0x0014  0x0020  0x002C  0x0038  0x0044  0x0050
- *
- * BANK 3 - 0x0100  0x010C  0x0118  0x0124  0x0130  0x013C  0x0148
- * BANK 4 - 0x0104  0x0110  0x011C  0x0128  0x0134  0x0140  0x014C
- * BANK 5 - 0x0108  0x0114  0x0120  0x012C  0x0138  0x0144  0x0150
- *
- * NOTE:
- *   BANK 3 is only available on PXA27x and later processors.
- *   BANK 4 and 5 are only available on PXA935
- */
-
-#define GPIO_BANK(n)	(GPIO_REGS_VIRT + BANK_OFF(n))
-
-#define GPLR_OFFSET	0x00
-#define GPDR_OFFSET	0x0C
-#define GPSR_OFFSET	0x18
-#define GPCR_OFFSET	0x24
-#define GRER_OFFSET	0x30
-#define GFER_OFFSET	0x3C
-#define GEDR_OFFSET	0x48
+/* The individual machine provides register offsets and NR_BUILTIN_GPIO */
+#include <mach/gpio-pxa.h>
 
 static inline int gpio_get_value(unsigned gpio)
 {
@@ -52,13 +27,4 @@ static inline void gpio_set_value(unsigned gpio, int value)
 
 #define gpio_cansleep		__gpio_cansleep
 
-/* NOTE: some PXAs have fewer on-chip GPIOs (like PXA255, with 85).
- * Those cases currently cause holes in the GPIO number space, the
- * actual number of the last GPIO is recorded by 'pxa_last_gpio'.
- */
-extern int pxa_last_gpio;
-
-typedef int (*set_wake_t)(struct irq_data *d, unsigned int on);
-
-extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn);
 #endif /* __PLAT_GPIO_H */