Merge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel

8 files changed, 1315 insertions, 0 deletions

diff --git a/arch/arm/plat-pxa/Kconfig b/arch/arm/plat-pxa/Kconfig
new file mode 100644
index 000000000000..b158e98038ed
--- /dev/null
+++ b/arch/arm/plat-pxa/Kconfig
@@ -0,0 +1,3 @@
+if PLAT_PXA
+
+endif
diff --git a/arch/arm/plat-pxa/Makefile b/arch/arm/plat-pxa/Makefile
new file mode 100644
index 000000000000..4be37235f57b
--- /dev/null
+++ b/arch/arm/plat-pxa/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for code common across different PXA processor families
+#
+
+obj-y   := dma.o mfp.o
+
+obj-$(CONFIG_GENERIC_GPIO)      += gpio.o
diff --git a/arch/arm/plat-pxa/dma.c b/arch/arm/plat-pxa/dma.c
new file mode 100644
index 000000000000..70aeee407f7d
--- /dev/null
+++ b/arch/arm/plat-pxa/dma.c
@@ -0,0 +1,144 @@
+/*
+ *  linux/arch/arm/plat-pxa/dma.c
+ *
+ *  PXA DMA registration and IRQ dispatching
+ *
+ *  Author:     Nicolas Pitre
+ *  Created:    Nov 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/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+
+#include <asm/system.h>
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <mach/dma.h>
+
+struct dma_channel {
+        char *name;
+        pxa_dma_prio prio;
+        void (*irq_handler)(int, void *);
+        void *data;
+};
+
+static struct dma_channel *dma_channels;
+static int num_dma_channels;
+
+int pxa_request_dma (char *name, pxa_dma_prio prio,
+                        void (*irq_handler)(int, void *),
+                        void *data)
+{
+        unsigned long flags;
+        int i, found = 0;
+
+        /* basic sanity checks */
+        if (!name || !irq_handler)
+                return -EINVAL;
+
+        local_irq_save(flags);
+
+        do {
+                /* try grabbing a DMA channel with the requested priority */
+                for (i = 0; i < num_dma_channels; i++) {
+                        if ((dma_channels[i].prio == prio) &&
+                            !dma_channels[i].name) {
+                                found = 1;
+                                break;
+                        }
+                }
+                /* if requested prio group is full, try a hier priority */
+        } while (!found && prio--);
+
+        if (found) {
+                DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+                dma_channels[i].name = name;
+                dma_channels[i].irq_handler = irq_handler;
+                dma_channels[i].data = data;
+        } else {
+                printk (KERN_WARNING "No more available DMA channels for %s\n", name);
+                i = -ENODEV;
+        }
+
+        local_irq_restore(flags);
+        return i;
+}
+
+void pxa_free_dma (int dma_ch)
+{
+        unsigned long flags;
+
+        if (!dma_channels[dma_ch].name) {
+                printk (KERN_CRIT
+                        "%s: trying to free channel %d which is already freed\n",
+                        __func__, dma_ch);
+                return;
+        }
+
+        local_irq_save(flags);
+        DCSR(dma_ch) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+        dma_channels[dma_ch].name = NULL;
+        local_irq_restore(flags);
+}
+
+static irqreturn_t dma_irq_handler(int irq, void *dev_id)
+{
+        int i, dint = DINT;
+
+        for (i = 0; i < num_dma_channels; i++) {
+                if (dint & (1 << i)) {
+                        struct dma_channel *channel = &dma_channels[i];
+                        if (channel->name && channel->irq_handler) {
+                                channel->irq_handler(i, channel->data);
+                        } else {
+                                /*
+                                 * IRQ for an unregistered DMA channel:
+                                 * let's clear the interrupts and disable it.
+                                 */
+                                printk (KERN_WARNING "spurious IRQ for DMA channel %d\n", i);
+                                DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR;
+                        }
+                }
+        }
+        return IRQ_HANDLED;
+}
+
+int __init pxa_init_dma(int irq, int num_ch)
+{
+        int i, ret;
+
+        dma_channels = kzalloc(sizeof(struct dma_channel) * num_ch, GFP_KERNEL);
+        if (dma_channels == NULL)
+                return -ENOMEM;
+
+        /* dma channel priorities on pxa2xx processors:
+         * ch 0 - 3,  16 - 19  <--> (0) DMA_PRIO_HIGH
+         * ch 4 - 7,  20 - 23  <--> (1) DMA_PRIO_MEDIUM
+         * ch 8 - 15, 24 - 31  <--> (2) DMA_PRIO_LOW
+         */
+        for (i = 0; i < num_ch; i++) {
+                DCSR(i) = 0;
+                dma_channels[i].prio = min((i & 0xf) >> 2, DMA_PRIO_LOW);
+        }
+
+        ret = request_irq(irq, dma_irq_handler, IRQF_DISABLED, "DMA", NULL);
+        if (ret) {
+                printk (KERN_CRIT "Wow!  Can't register IRQ for DMA\n");
+                kfree(dma_channels);
+                return ret;
+        }
+
+        num_dma_channels = num_ch;
+        return 0;
+}
+
+EXPORT_SYMBOL(pxa_request_dma);
+EXPORT_SYMBOL(pxa_free_dma);
diff --git a/arch/arm/plat-pxa/gpio.c b/arch/arm/plat-pxa/gpio.c
new file mode 100644
index 000000000000..af819bf21b63
--- /dev/null
+++ b/arch/arm/plat-pxa/gpio.c
@@ -0,0 +1,337 @@
+/*
+ *  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/sysdev.h>
+#include <linux/bootmem.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_chip(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;
+
+        /* this is early, we have to use bootmem allocator, and we really
+         * want this to be allocated dynamically for different 'gpio_end'
+         */
+        chips = alloc_bootmem_low(nbanks * sizeof(struct pxa_gpio_chip));
+        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 = (void __iomem *)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;
+}
+
+static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
+{
+        struct pxa_gpio_chip *c;
+        int gpio = irq_to_gpio(irq);
+        unsigned long gpdr, mask = GPIO_bit(gpio);
+
+        c = gpio_to_chip(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;
+
+        __raw_writel(c->irq_edge_rise & c->irq_mask, c->regbase + GRER_OFFSET);
+        __raw_writel(c->irq_edge_fall & c->irq_mask, c->regbase + GFER_OFFSET);
+
+        pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, 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(unsigned int irq)
+{
+        int gpio = irq_to_gpio(irq);
+        struct pxa_gpio_chip *c = gpio_to_chip(gpio);
+
+        __raw_writel(GPIO_bit(gpio), c->regbase + GEDR_OFFSET);
+}
+
+static void pxa_mask_muxed_gpio(unsigned int irq)
+{
+        int gpio = irq_to_gpio(irq);
+        struct pxa_gpio_chip *c = gpio_to_chip(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(unsigned int irq)
+{
+        int gpio = irq_to_gpio(irq);
+        struct pxa_gpio_chip *c = gpio_to_chip(gpio);
+
+        c->irq_mask |= GPIO_bit(gpio);
+        __raw_writel(c->irq_edge_rise & c->irq_mask, c->regbase + GRER_OFFSET);
+        __raw_writel(c->irq_edge_fall & c->irq_mask, c->regbase + GFER_OFFSET);
+}
+
+static struct irq_chip pxa_muxed_gpio_chip = {
+        .name           = "GPIO",
+        .ack            = pxa_ack_muxed_gpio,
+        .mask           = pxa_mask_muxed_gpio,
+        .unmask         = pxa_unmask_muxed_gpio,
+        .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++) {
+                set_irq_chip(irq, &pxa_muxed_gpio_chip);
+                set_irq_handler(irq, handle_edge_irq);
+                set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+        }
+
+        /* Install handler for GPIO>=2 edge detect interrupts */
+        set_irq_chained_handler(mux_irq, pxa_gpio_demux_handler);
+        pxa_muxed_gpio_chip.set_wake = fn;
+}
+
+#ifdef CONFIG_PM
+static int pxa_gpio_suspend(struct sys_device *dev, pm_message_t state)
+{
+        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 int pxa_gpio_resume(struct sys_device *dev)
+{
+        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);
+        }
+        return 0;
+}
+#else
+#define pxa_gpio_suspend        NULL
+#define pxa_gpio_resume         NULL
+#endif
+
+struct sysdev_class pxa_gpio_sysclass = {
+        .name           = "gpio",
+        .suspend        = pxa_gpio_suspend,
+        .resume         = pxa_gpio_resume,
+};
+
+static int __init pxa_gpio_init(void)
+{
+        return sysdev_class_register(&pxa_gpio_sysclass);
+}
+
+core_initcall(pxa_gpio_init);
diff --git a/arch/arm/plat-pxa/include/plat/dma.h b/arch/arm/plat-pxa/include/plat/dma.h
new file mode 100644
index 000000000000..a7b91dc06852
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/dma.h
@@ -0,0 +1,85 @@
+#ifndef __PLAT_DMA_H
+#define __PLAT_DMA_H
+
+#define DMAC_REG(x)     (*((volatile u32 *)(DMAC_REGS_VIRT + (x))))
+
+#define DCSR(n)         DMAC_REG((n) << 2)
+#define DALGN           DMAC_REG(0x00a0)  /* DMA Alignment Register */
+#define DINT            DMAC_REG(0x00f0)  /* DMA Interrupt Register */
+#define DDADR(n)        DMAC_REG(0x0200 + ((n) << 4))
+#define DSADR(n)        DMAC_REG(0x0204 + ((n) << 4))
+#define DTADR(n)        DMAC_REG(0x0208 + ((n) << 4))
+#define DCMD(n)         DMAC_REG(0x020c + ((n) << 4))
+#define DRCMR(n)        DMAC_REG((((n) < 64) ? 0x0100 : 0x1100) + \
+                                 (((n) & 0x3f) << 2))
+
+#define DCSR_RUN        (1 << 31)       /* Run Bit (read / write) */
+#define DCSR_NODESC     (1 << 30)       /* No-Descriptor Fetch (read / write) */
+#define DCSR_STOPIRQEN  (1 << 29)       /* Stop Interrupt Enable (read / write) */
+#define DCSR_REQPEND    (1 << 8)        /* Request Pending (read-only) */
+#define DCSR_STOPSTATE  (1 << 3)        /* Stop State (read-only) */
+#define DCSR_ENDINTR    (1 << 2)        /* End Interrupt (read / write) */
+#define DCSR_STARTINTR  (1 << 1)        /* Start Interrupt (read / write) */
+#define DCSR_BUSERR     (1 << 0)        /* Bus Error Interrupt (read / write) */
+
+#define DCSR_EORIRQEN   (1 << 28)       /* End of Receive Interrupt Enable (R/W) */
+#define DCSR_EORJMPEN   (1 << 27)       /* Jump to next descriptor on EOR */
+#define DCSR_EORSTOPEN  (1 << 26)       /* STOP on an EOR */
+#define DCSR_SETCMPST   (1 << 25)       /* Set Descriptor Compare Status */
+#define DCSR_CLRCMPST   (1 << 24)       /* Clear Descriptor Compare Status */
+#define DCSR_CMPST      (1 << 10)       /* The Descriptor Compare Status */
+#define DCSR_EORINTR    (1 << 9)        /* The end of Receive */
+
+#define DRCMR_MAPVLD    (1 << 7)        /* Map Valid (read / write) */
+#define DRCMR_CHLNUM    0x1f            /* mask for Channel Number (read / write) */
+
+#define DDADR_DESCADDR  0xfffffff0      /* Address of next descriptor (mask) */
+#define DDADR_STOP      (1 << 0)        /* Stop (read / write) */
+
+#define DCMD_INCSRCADDR (1 << 31)       /* Source Address Increment Setting. */
+#define DCMD_INCTRGADDR (1 << 30)       /* Target Address Increment Setting. */
+#define DCMD_FLOWSRC    (1 << 29)       /* Flow Control by the source. */
+#define DCMD_FLOWTRG    (1 << 28)       /* Flow Control by the target. */
+#define DCMD_STARTIRQEN (1 << 22)       /* Start Interrupt Enable */
+#define DCMD_ENDIRQEN   (1 << 21)       /* End Interrupt Enable */
+#define DCMD_ENDIAN     (1 << 18)       /* Device Endian-ness. */
+#define DCMD_BURST8     (1 << 16)       /* 8 byte burst */
+#define DCMD_BURST16    (2 << 16)       /* 16 byte burst */
+#define DCMD_BURST32    (3 << 16)       /* 32 byte burst */
+#define DCMD_WIDTH1     (1 << 14)       /* 1 byte width */
+#define DCMD_WIDTH2     (2 << 14)       /* 2 byte width (HalfWord) */
+#define DCMD_WIDTH4     (3 << 14)       /* 4 byte width (Word) */
+#define DCMD_LENGTH     0x01fff         /* length mask (max = 8K - 1) */
+
+/*
+ * Descriptor structure for PXA's DMA engine
+ * Note: this structure must always be aligned to a 16-byte boundary.
+ */
+
+typedef struct pxa_dma_desc {
+        volatile u32 ddadr;     /* Points to the next descriptor + flags */
+        volatile u32 dsadr;     /* DSADR value for the current transfer */
+        volatile u32 dtadr;     /* DTADR value for the current transfer */
+        volatile u32 dcmd;      /* DCMD value for the current transfer */
+} pxa_dma_desc;
+
+typedef enum {
+        DMA_PRIO_HIGH = 0,
+        DMA_PRIO_MEDIUM = 1,
+        DMA_PRIO_LOW = 2
+} pxa_dma_prio;
+
+/*
+ * DMA registration
+ */
+
+int __init pxa_init_dma(int irq, int num_ch);
+
+int pxa_request_dma (char *name,
+                         pxa_dma_prio prio,
+                         void (*irq_handler)(int, void *),
+                         void *data);
+
+void pxa_free_dma (int dma_ch);
+
+#endif /* __PLAT_DMA_H */
diff --git a/arch/arm/plat-pxa/include/plat/gpio.h b/arch/arm/plat-pxa/include/plat/gpio.h
new file mode 100644
index 000000000000..44248cb926a5
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/gpio.h
@@ -0,0 +1,62 @@
+#ifndef __PLAT_GPIO_H
+#define __PLAT_GPIO_H
+
+/*
+ * 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
+
+static inline int gpio_get_value(unsigned gpio)
+{
+        if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO))
+                return GPLR(gpio) & GPIO_bit(gpio);
+        else
+                return __gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+        if (__builtin_constant_p(gpio) && (gpio < NR_BUILTIN_GPIO)) {
+                if (value)
+                        GPSR(gpio) = GPIO_bit(gpio);
+                else
+                        GPCR(gpio) = GPIO_bit(gpio);
+        } else
+                __gpio_set_value(gpio, 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)(unsigned int irq, unsigned int on);
+
+extern void pxa_init_gpio(int mux_irq, int start, int end, set_wake_t fn);
+#endif /* __PLAT_GPIO_H */
diff --git a/arch/arm/plat-pxa/include/plat/mfp.h b/arch/arm/plat-pxa/include/plat/mfp.h
new file mode 100644
index 000000000000..64019464c8db
--- /dev/null
+++ b/arch/arm/plat-pxa/include/plat/mfp.h
@@ -0,0 +1,399 @@
+/*
+ * arch/arm/plat-pxa/include/plat/mfp.h
+ *
+ *   Common Multi-Function Pin Definitions
+ *
+ * Copyright (C) 2007 Marvell International Ltd.
+ *
+ * 2007-8-21: eric miao <eric.miao@marvell.com>
+ *            initial version
+ *
+ *  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.
+ */
+
+#ifndef __ASM_PLAT_MFP_H
+#define __ASM_PLAT_MFP_H
+
+#define mfp_to_gpio(m)  ((m) % 128)
+
+/* list of all the configurable MFP pins */
+enum {
+        MFP_PIN_INVALID = -1,
+
+        MFP_PIN_GPIO0 = 0,
+        MFP_PIN_GPIO1,
+        MFP_PIN_GPIO2,
+        MFP_PIN_GPIO3,
+        MFP_PIN_GPIO4,
+        MFP_PIN_GPIO5,
+        MFP_PIN_GPIO6,
+        MFP_PIN_GPIO7,
+        MFP_PIN_GPIO8,
+        MFP_PIN_GPIO9,
+        MFP_PIN_GPIO10,
+        MFP_PIN_GPIO11,
+        MFP_PIN_GPIO12,
+        MFP_PIN_GPIO13,
+        MFP_PIN_GPIO14,
+        MFP_PIN_GPIO15,
+        MFP_PIN_GPIO16,
+        MFP_PIN_GPIO17,
+        MFP_PIN_GPIO18,
+        MFP_PIN_GPIO19,
+        MFP_PIN_GPIO20,
+        MFP_PIN_GPIO21,
+        MFP_PIN_GPIO22,
+        MFP_PIN_GPIO23,
+        MFP_PIN_GPIO24,
+        MFP_PIN_GPIO25,
+        MFP_PIN_GPIO26,
+        MFP_PIN_GPIO27,
+        MFP_PIN_GPIO28,
+        MFP_PIN_GPIO29,
+        MFP_PIN_GPIO30,
+        MFP_PIN_GPIO31,
+        MFP_PIN_GPIO32,
+        MFP_PIN_GPIO33,
+        MFP_PIN_GPIO34,
+        MFP_PIN_GPIO35,
+        MFP_PIN_GPIO36,
+        MFP_PIN_GPIO37,
+        MFP_PIN_GPIO38,
+        MFP_PIN_GPIO39,
+        MFP_PIN_GPIO40,
+        MFP_PIN_GPIO41,
+        MFP_PIN_GPIO42,
+        MFP_PIN_GPIO43,
+        MFP_PIN_GPIO44,
+        MFP_PIN_GPIO45,
+        MFP_PIN_GPIO46,
+        MFP_PIN_GPIO47,
+        MFP_PIN_GPIO48,
+        MFP_PIN_GPIO49,
+        MFP_PIN_GPIO50,
+        MFP_PIN_GPIO51,
+        MFP_PIN_GPIO52,
+        MFP_PIN_GPIO53,
+        MFP_PIN_GPIO54,
+        MFP_PIN_GPIO55,
+        MFP_PIN_GPIO56,
+        MFP_PIN_GPIO57,
+        MFP_PIN_GPIO58,
+        MFP_PIN_GPIO59,
+        MFP_PIN_GPIO60,
+        MFP_PIN_GPIO61,
+        MFP_PIN_GPIO62,
+        MFP_PIN_GPIO63,
+        MFP_PIN_GPIO64,
+        MFP_PIN_GPIO65,
+        MFP_PIN_GPIO66,
+        MFP_PIN_GPIO67,
+        MFP_PIN_GPIO68,
+        MFP_PIN_GPIO69,
+        MFP_PIN_GPIO70,
+        MFP_PIN_GPIO71,
+        MFP_PIN_GPIO72,
+        MFP_PIN_GPIO73,
+        MFP_PIN_GPIO74,
+        MFP_PIN_GPIO75,
+        MFP_PIN_GPIO76,
+        MFP_PIN_GPIO77,
+        MFP_PIN_GPIO78,
+        MFP_PIN_GPIO79,
+        MFP_PIN_GPIO80,
+        MFP_PIN_GPIO81,
+        MFP_PIN_GPIO82,
+        MFP_PIN_GPIO83,
+        MFP_PIN_GPIO84,
+        MFP_PIN_GPIO85,
+        MFP_PIN_GPIO86,
+        MFP_PIN_GPIO87,
+        MFP_PIN_GPIO88,
+        MFP_PIN_GPIO89,
+        MFP_PIN_GPIO90,
+        MFP_PIN_GPIO91,
+        MFP_PIN_GPIO92,
+        MFP_PIN_GPIO93,
+        MFP_PIN_GPIO94,
+        MFP_PIN_GPIO95,
+        MFP_PIN_GPIO96,
+        MFP_PIN_GPIO97,
+        MFP_PIN_GPIO98,
+        MFP_PIN_GPIO99,
+        MFP_PIN_GPIO100,
+        MFP_PIN_GPIO101,
+        MFP_PIN_GPIO102,
+        MFP_PIN_GPIO103,
+        MFP_PIN_GPIO104,
+        MFP_PIN_GPIO105,
+        MFP_PIN_GPIO106,
+        MFP_PIN_GPIO107,
+        MFP_PIN_GPIO108,
+        MFP_PIN_GPIO109,
+        MFP_PIN_GPIO110,
+        MFP_PIN_GPIO111,
+        MFP_PIN_GPIO112,
+        MFP_PIN_GPIO113,
+        MFP_PIN_GPIO114,
+        MFP_PIN_GPIO115,
+        MFP_PIN_GPIO116,
+        MFP_PIN_GPIO117,
+        MFP_PIN_GPIO118,
+        MFP_PIN_GPIO119,
+        MFP_PIN_GPIO120,
+        MFP_PIN_GPIO121,
+        MFP_PIN_GPIO122,
+        MFP_PIN_GPIO123,
+        MFP_PIN_GPIO124,
+        MFP_PIN_GPIO125,
+        MFP_PIN_GPIO126,
+        MFP_PIN_GPIO127,
+        MFP_PIN_GPIO0_2,
+        MFP_PIN_GPIO1_2,
+        MFP_PIN_GPIO2_2,
+        MFP_PIN_GPIO3_2,
+        MFP_PIN_GPIO4_2,
+        MFP_PIN_GPIO5_2,
+        MFP_PIN_GPIO6_2,
+        MFP_PIN_GPIO7_2,
+        MFP_PIN_GPIO8_2,
+        MFP_PIN_GPIO9_2,
+        MFP_PIN_GPIO10_2,
+        MFP_PIN_GPIO11_2,
+        MFP_PIN_GPIO12_2,
+        MFP_PIN_GPIO13_2,
+        MFP_PIN_GPIO14_2,
+        MFP_PIN_GPIO15_2,
+        MFP_PIN_GPIO16_2,
+        MFP_PIN_GPIO17_2,
+
+        MFP_PIN_ULPI_STP,
+        MFP_PIN_ULPI_NXT,
+        MFP_PIN_ULPI_DIR,
+
+        MFP_PIN_nXCVREN,
+        MFP_PIN_DF_CLE_nOE,
+        MFP_PIN_DF_nADV1_ALE,
+        MFP_PIN_DF_SCLK_E,
+        MFP_PIN_DF_SCLK_S,
+        MFP_PIN_nBE0,
+        MFP_PIN_nBE1,
+        MFP_PIN_DF_nADV2_ALE,
+        MFP_PIN_DF_INT_RnB,
+        MFP_PIN_DF_nCS0,
+        MFP_PIN_DF_nCS1,
+        MFP_PIN_nLUA,
+        MFP_PIN_nLLA,
+        MFP_PIN_DF_nWE,
+        MFP_PIN_DF_ALE_nWE,
+        MFP_PIN_DF_nRE_nOE,
+        MFP_PIN_DF_ADDR0,
+        MFP_PIN_DF_ADDR1,
+        MFP_PIN_DF_ADDR2,
+        MFP_PIN_DF_ADDR3,
+        MFP_PIN_DF_IO0,
+        MFP_PIN_DF_IO1,
+        MFP_PIN_DF_IO2,
+        MFP_PIN_DF_IO3,
+        MFP_PIN_DF_IO4,
+        MFP_PIN_DF_IO5,
+        MFP_PIN_DF_IO6,
+        MFP_PIN_DF_IO7,
+        MFP_PIN_DF_IO8,
+        MFP_PIN_DF_IO9,
+        MFP_PIN_DF_IO10,
+        MFP_PIN_DF_IO11,
+        MFP_PIN_DF_IO12,
+        MFP_PIN_DF_IO13,
+        MFP_PIN_DF_IO14,
+        MFP_PIN_DF_IO15,
+        MFP_PIN_DF_nCS0_SM_nCS2,
+        MFP_PIN_DF_nCS1_SM_nCS3,
+        MFP_PIN_SM_nCS0,
+        MFP_PIN_SM_nCS1,
+        MFP_PIN_DF_WEn,
+        MFP_PIN_DF_REn,
+        MFP_PIN_DF_CLE_SM_OEn,
+        MFP_PIN_DF_ALE_SM_WEn,
+        MFP_PIN_DF_RDY0,
+        MFP_PIN_DF_RDY1,
+
+        MFP_PIN_SM_SCLK,
+        MFP_PIN_SM_BE0,
+        MFP_PIN_SM_BE1,
+        MFP_PIN_SM_ADV,
+        MFP_PIN_SM_ADVMUX,
+        MFP_PIN_SM_RDY,
+
+        MFP_PIN_MMC1_DAT7,
+        MFP_PIN_MMC1_DAT6,
+        MFP_PIN_MMC1_DAT5,
+        MFP_PIN_MMC1_DAT4,
+        MFP_PIN_MMC1_DAT3,
+        MFP_PIN_MMC1_DAT2,
+        MFP_PIN_MMC1_DAT1,
+        MFP_PIN_MMC1_DAT0,
+        MFP_PIN_MMC1_CMD,
+        MFP_PIN_MMC1_CLK,
+        MFP_PIN_MMC1_CD,
+        MFP_PIN_MMC1_WP,
+
+        /* additional pins on PXA930 */
+        MFP_PIN_GSIM_UIO,
+        MFP_PIN_GSIM_UCLK,
+        MFP_PIN_GSIM_UDET,
+        MFP_PIN_GSIM_nURST,
+        MFP_PIN_PMIC_INT,
+        MFP_PIN_RDY,
+
+        MFP_PIN_MAX,
+};
+
+/*
+ * a possible MFP configuration is represented by a 32-bit integer
+ *
+ * bit  0.. 9 - MFP Pin Number (1024 Pins Maximum)
+ * bit 10..12 - Alternate Function Selection
+ * bit 13..15 - Drive Strength
+ * bit 16..18 - Low Power Mode State
+ * bit 19..20 - Low Power Mode Edge Detection
+ * bit 21..22 - Run Mode Pull State
+ *
+ * to facilitate the definition, the following macros are provided
+ *
+ * MFP_CFG_DEFAULT - default MFP configuration value, with
+ *                alternate function = 0,
+ *                drive strength = fast 3mA (MFP_DS03X)
+ *                low power mode = default
+ *                edge detection = none
+ *
+ * MFP_CFG      - default MFPR value with alternate function
+ * MFP_CFG_DRV  - default MFPR value with alternate function and
+ *                pin drive strength
+ * MFP_CFG_LPM  - default MFPR value with alternate function and
+ *                low power mode
+ * MFP_CFG_X    - default MFPR value with alternate function,
+ *                pin drive strength and low power mode
+ */
+
+typedef unsigned long mfp_cfg_t;
+
+#define MFP_PIN(x)              ((x) & 0x3ff)
+
+#define MFP_AF0                 (0x0 << 10)
+#define MFP_AF1                 (0x1 << 10)
+#define MFP_AF2                 (0x2 << 10)
+#define MFP_AF3                 (0x3 << 10)
+#define MFP_AF4                 (0x4 << 10)
+#define MFP_AF5                 (0x5 << 10)
+#define MFP_AF6                 (0x6 << 10)
+#define MFP_AF7                 (0x7 << 10)
+#define MFP_AF_MASK             (0x7 << 10)
+#define MFP_AF(x)               (((x) >> 10) & 0x7)
+
+#define MFP_DS01X               (0x0 << 13)
+#define MFP_DS02X               (0x1 << 13)
+#define MFP_DS03X               (0x2 << 13)
+#define MFP_DS04X               (0x3 << 13)
+#define MFP_DS06X               (0x4 << 13)
+#define MFP_DS08X               (0x5 << 13)
+#define MFP_DS10X               (0x6 << 13)
+#define MFP_DS13X               (0x7 << 13)
+#define MFP_DS_MASK             (0x7 << 13)
+#define MFP_DS(x)               (((x) >> 13) & 0x7)
+
+#define MFP_LPM_DEFAULT         (0x0 << 16)
+#define MFP_LPM_DRIVE_LOW       (0x1 << 16)
+#define MFP_LPM_DRIVE_HIGH      (0x2 << 16)
+#define MFP_LPM_PULL_LOW        (0x3 << 16)
+#define MFP_LPM_PULL_HIGH       (0x4 << 16)
+#define MFP_LPM_FLOAT           (0x5 << 16)
+#define MFP_LPM_INPUT           (0x6 << 16)
+#define MFP_LPM_STATE_MASK      (0x7 << 16)
+#define MFP_LPM_STATE(x)        (((x) >> 16) & 0x7)
+
+#define MFP_LPM_EDGE_NONE       (0x0 << 19)
+#define MFP_LPM_EDGE_RISE       (0x1 << 19)
+#define MFP_LPM_EDGE_FALL       (0x2 << 19)
+#define MFP_LPM_EDGE_BOTH       (0x3 << 19)
+#define MFP_LPM_EDGE_MASK       (0x3 << 19)
+#define MFP_LPM_EDGE(x)         (((x) >> 19) & 0x3)
+
+#define MFP_PULL_NONE           (0x0 << 21)
+#define MFP_PULL_LOW            (0x1 << 21)
+#define MFP_PULL_HIGH           (0x2 << 21)
+#define MFP_PULL_BOTH           (0x3 << 21)
+#define MFP_PULL_MASK           (0x3 << 21)
+#define MFP_PULL(x)             (((x) >> 21) & 0x3)
+
+#define MFP_CFG_DEFAULT         (MFP_AF0 | MFP_DS03X | MFP_LPM_DEFAULT |\
+                                 MFP_LPM_EDGE_NONE | MFP_PULL_NONE)
+
+#define MFP_CFG(pin, af)                \
+        ((MFP_CFG_DEFAULT & ~MFP_AF_MASK) |\
+         (MFP_PIN(MFP_PIN_##pin) | MFP_##af))
+
+#define MFP_CFG_DRV(pin, af, drv)       \
+        ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK)) |\
+         (MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv))
+
+#define MFP_CFG_LPM(pin, af, lpm)       \
+        ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_LPM_STATE_MASK)) |\
+         (MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_LPM_##lpm))
+
+#define MFP_CFG_X(pin, af, drv, lpm)    \
+        ((MFP_CFG_DEFAULT & ~(MFP_AF_MASK | MFP_DS_MASK | MFP_LPM_STATE_MASK)) |\
+         (MFP_PIN(MFP_PIN_##pin) | MFP_##af | MFP_##drv | MFP_LPM_##lpm))
+
+#if defined(CONFIG_PXA3xx) || defined(CONFIG_ARCH_MMP)
+/*
+ * each MFP pin will have a MFPR register, since the offset of the
+ * register varies between processors, the processor specific code
+ * should initialize the pin offsets by mfp_init()
+ *
+ * mfp_init_base() - accepts a virtual base for all MFPR registers and
+ * initialize the MFP table to a default state
+ *
+ * mfp_init_addr() - accepts a table of "mfp_addr_map" structure, which
+ * represents a range of MFP pins from "start" to "end", with the offset
+ * begining at "offset", to define a single pin, let "end" = -1.
+ *
+ * use
+ *
+ * MFP_ADDR_X() to define a range of pins
+ * MFP_ADDR()   to define a single pin
+ * MFP_ADDR_END to signal the end of pin offset definitions
+ */
+struct mfp_addr_map {
+        unsigned int    start;
+        unsigned int    end;
+        unsigned long   offset;
+};
+
+#define MFP_ADDR_X(start, end, offset) \
+        { MFP_PIN_##start, MFP_PIN_##end, offset }
+
+#define MFP_ADDR(pin, offset) \
+        { MFP_PIN_##pin, -1, offset }
+
+#define MFP_ADDR_END    { MFP_PIN_INVALID, 0 }
+
+void __init mfp_init_base(unsigned long mfpr_base);
+void __init mfp_init_addr(struct mfp_addr_map *map);
+
+/*
+ * mfp_{read, write}()  - for direct read/write access to the MFPR register
+ * mfp_config()         - for configuring a group of MFPR registers
+ * mfp_config_lpm()     - configuring all low power MFPR registers for suspend
+ * mfp_config_run()     - configuring all run time  MFPR registers after resume
+ */
+unsigned long mfp_read(int mfp);
+void mfp_write(int mfp, unsigned long mfpr_val);
+void mfp_config(unsigned long *mfp_cfgs, int num);
+void mfp_config_run(void);
+void mfp_config_lpm(void);
+#endif /* CONFIG_PXA3xx || CONFIG_ARCH_MMP */
+
+#endif /* __ASM_PLAT_MFP_H */
diff --git a/arch/arm/plat-pxa/mfp.c b/arch/arm/plat-pxa/mfp.c
new file mode 100644
index 000000000000..e716c622a17c
--- /dev/null
+++ b/arch/arm/plat-pxa/mfp.c
@@ -0,0 +1,278 @@
+/*
+ * linux/arch/arm/plat-pxa/mfp.c
+ *
+ *   Multi-Function Pin Support
+ *
+ * Copyright (C) 2007 Marvell Internation Ltd.
+ *
+ * 2007-08-21: eric miao <eric.miao@marvell.com>
+ *             initial version
+ *
+ *  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/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/sysdev.h>
+
+#include <plat/mfp.h>
+
+#define MFPR_SIZE       (PAGE_SIZE)
+
+/* MFPR register bit definitions */
+#define MFPR_PULL_SEL           (0x1 << 15)
+#define MFPR_PULLUP_EN          (0x1 << 14)
+#define MFPR_PULLDOWN_EN        (0x1 << 13)
+#define MFPR_SLEEP_SEL          (0x1 << 9)
+#define MFPR_SLEEP_OE_N         (0x1 << 7)
+#define MFPR_EDGE_CLEAR         (0x1 << 6)
+#define MFPR_EDGE_FALL_EN       (0x1 << 5)
+#define MFPR_EDGE_RISE_EN       (0x1 << 4)
+
+#define MFPR_SLEEP_DATA(x)      ((x) << 8)
+#define MFPR_DRIVE(x)           (((x) & 0x7) << 10)
+#define MFPR_AF_SEL(x)          (((x) & 0x7) << 0)
+
+#define MFPR_EDGE_NONE          (0)
+#define MFPR_EDGE_RISE          (MFPR_EDGE_RISE_EN)
+#define MFPR_EDGE_FALL          (MFPR_EDGE_FALL_EN)
+#define MFPR_EDGE_BOTH          (MFPR_EDGE_RISE | MFPR_EDGE_FALL)
+
+/*
+ * Table that determines the low power modes outputs, with actual settings
+ * used in parentheses for don't-care values. Except for the float output,
+ * the configured driven and pulled levels match, so if there is a need for
+ * non-LPM pulled output, the same configuration could probably be used.
+ *
+ * Output value  sleep_oe_n  sleep_data  pullup_en  pulldown_en  pull_sel
+ *                 (bit 7)    (bit 8)    (bit 14)     (bit 13)   (bit 15)
+ *
+ * Input            0          X(0)        X(0)        X(0)       0
+ * Drive 0          0          0           0           X(1)       0
+ * Drive 1          0          1           X(1)        0          0
+ * Pull hi (1)      1          X(1)        1           0          0
+ * Pull lo (0)      1          X(0)        0           1          0
+ * Z (float)        1          X(0)        0           0          0
+ */
+#define MFPR_LPM_INPUT          (0)
+#define MFPR_LPM_DRIVE_LOW      (MFPR_SLEEP_DATA(0) | MFPR_PULLDOWN_EN)
+#define MFPR_LPM_DRIVE_HIGH     (MFPR_SLEEP_DATA(1) | MFPR_PULLUP_EN)
+#define MFPR_LPM_PULL_LOW       (MFPR_LPM_DRIVE_LOW  | MFPR_SLEEP_OE_N)
+#define MFPR_LPM_PULL_HIGH      (MFPR_LPM_DRIVE_HIGH | MFPR_SLEEP_OE_N)
+#define MFPR_LPM_FLOAT          (MFPR_SLEEP_OE_N)
+#define MFPR_LPM_MASK           (0xe080)
+
+/*
+ * The pullup and pulldown state of the MFP pin at run mode is by default
+ * determined by the selected alternate function. In case that some buggy
+ * devices need to override this default behavior,  the definitions below
+ * indicates the setting of corresponding MFPR bits
+ *
+ * Definition       pull_sel  pullup_en  pulldown_en
+ * MFPR_PULL_NONE       0         0        0
+ * MFPR_PULL_LOW        1         0        1
+ * MFPR_PULL_HIGH       1         1        0
+ * MFPR_PULL_BOTH       1         1        1
+ */
+#define MFPR_PULL_NONE          (0)
+#define MFPR_PULL_LOW           (MFPR_PULL_SEL | MFPR_PULLDOWN_EN)
+#define MFPR_PULL_BOTH          (MFPR_PULL_LOW | MFPR_PULLUP_EN)
+#define MFPR_PULL_HIGH          (MFPR_PULL_SEL | MFPR_PULLUP_EN)
+
+/* mfp_spin_lock is used to ensure that MFP register configuration
+ * (most likely a read-modify-write operation) is atomic, and that
+ * mfp_table[] is consistent
+ */
+static DEFINE_SPINLOCK(mfp_spin_lock);
+
+static void __iomem *mfpr_mmio_base;
+
+struct mfp_pin {
+        unsigned long   config;         /* -1 for not configured */
+        unsigned long   mfpr_off;       /* MFPRxx Register offset */
+        unsigned long   mfpr_run;       /* Run-Mode Register Value */
+        unsigned long   mfpr_lpm;       /* Low Power Mode Register Value */
+};
+
+static struct mfp_pin mfp_table[MFP_PIN_MAX];
+
+/* mapping of MFP_LPM_* definitions to MFPR_LPM_* register bits */
+static const unsigned long mfpr_lpm[] = {
+        MFPR_LPM_INPUT,
+        MFPR_LPM_DRIVE_LOW,
+        MFPR_LPM_DRIVE_HIGH,
+        MFPR_LPM_PULL_LOW,
+        MFPR_LPM_PULL_HIGH,
+        MFPR_LPM_FLOAT,
+};
+
+/* mapping of MFP_PULL_* definitions to MFPR_PULL_* register bits */
+static const unsigned long mfpr_pull[] = {
+        MFPR_PULL_NONE,
+        MFPR_PULL_LOW,
+        MFPR_PULL_HIGH,
+        MFPR_PULL_BOTH,
+};
+
+/* mapping of MFP_LPM_EDGE_* definitions to MFPR_EDGE_* register bits */
+static const unsigned long mfpr_edge[] = {
+        MFPR_EDGE_NONE,
+        MFPR_EDGE_RISE,
+        MFPR_EDGE_FALL,
+        MFPR_EDGE_BOTH,
+};
+
+#define mfpr_readl(off)                 \
+        __raw_readl(mfpr_mmio_base + (off))
+
+#define mfpr_writel(off, val)           \
+        __raw_writel(val, mfpr_mmio_base + (off))
+
+#define mfp_configured(p)       ((p)->config != -1)
+
+/*
+ * perform a read-back of any MFPR register to make sure the
+ * previous writings are finished
+ */
+#define mfpr_sync()     (void)__raw_readl(mfpr_mmio_base + 0)
+
+static inline void __mfp_config_run(struct mfp_pin *p)
+{
+        if (mfp_configured(p))
+                mfpr_writel(p->mfpr_off, p->mfpr_run);
+}
+
+static inline void __mfp_config_lpm(struct mfp_pin *p)
+{
+        if (mfp_configured(p)) {
+                unsigned long mfpr_clr = (p->mfpr_run & ~MFPR_EDGE_BOTH) | MFPR_EDGE_CLEAR;
+                if (mfpr_clr != p->mfpr_run)
+                        mfpr_writel(p->mfpr_off, mfpr_clr);
+                if (p->mfpr_lpm != mfpr_clr)
+                        mfpr_writel(p->mfpr_off, p->mfpr_lpm);
+        }
+}
+
+void mfp_config(unsigned long *mfp_cfgs, int num)
+{
+        unsigned long flags;
+        int i;
+
+        spin_lock_irqsave(&mfp_spin_lock, flags);
+
+        for (i = 0; i < num; i++, mfp_cfgs++) {
+                unsigned long tmp, c = *mfp_cfgs;
+                struct mfp_pin *p;
+                int pin, af, drv, lpm, edge, pull;
+
+                pin = MFP_PIN(c);
+                BUG_ON(pin >= MFP_PIN_MAX);
+                p = &mfp_table[pin];
+
+                af  = MFP_AF(c);
+                drv = MFP_DS(c);
+                lpm = MFP_LPM_STATE(c);
+                edge = MFP_LPM_EDGE(c);
+                pull = MFP_PULL(c);
+
+                /* run-mode pull settings will conflict with MFPR bits of
+                 * low power mode state,  calculate mfpr_run and mfpr_lpm
+                 * individually if pull != MFP_PULL_NONE
+                 */
+                tmp = MFPR_AF_SEL(af) | MFPR_DRIVE(drv);
+
+                if (likely(pull == MFP_PULL_NONE)) {
+                        p->mfpr_run = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];
+                        p->mfpr_lpm = p->mfpr_run;
+                } else {
+                        p->mfpr_lpm = tmp | mfpr_lpm[lpm] | mfpr_edge[edge];
+                        p->mfpr_run = tmp | mfpr_pull[pull];
+                }
+
+                p->config = c; __mfp_config_run(p);
+        }
+
+        mfpr_sync();
+        spin_unlock_irqrestore(&mfp_spin_lock, flags);
+}
+
+unsigned long mfp_read(int mfp)
+{
+        unsigned long val, flags;
+
+        BUG_ON(mfp >= MFP_PIN_MAX);
+
+        spin_lock_irqsave(&mfp_spin_lock, flags);
+        val = mfpr_readl(mfp_table[mfp].mfpr_off);
+        spin_unlock_irqrestore(&mfp_spin_lock, flags);
+
+        return val;
+}
+
+void mfp_write(int mfp, unsigned long val)
+{
+        unsigned long flags;
+
+        BUG_ON(mfp >= MFP_PIN_MAX);
+
+        spin_lock_irqsave(&mfp_spin_lock, flags);
+        mfpr_writel(mfp_table[mfp].mfpr_off, val);
+        mfpr_sync();
+        spin_unlock_irqrestore(&mfp_spin_lock, flags);
+}
+
+void __init mfp_init_base(unsigned long mfpr_base)
+{
+        int i;
+
+        /* initialize the table with default - unconfigured */
+        for (i = 0; i < ARRAY_SIZE(mfp_table); i++)
+                mfp_table[i].config = -1;
+
+        mfpr_mmio_base = (void __iomem *)mfpr_base;
+}
+
+void __init mfp_init_addr(struct mfp_addr_map *map)
+{
+        struct mfp_addr_map *p;
+        unsigned long offset, flags;
+        int i;
+
+        spin_lock_irqsave(&mfp_spin_lock, flags);
+
+        for (p = map; p->start != MFP_PIN_INVALID; p++) {
+                offset = p->offset;
+                i = p->start;
+
+                do {
+                        mfp_table[i].mfpr_off = offset;
+                        mfp_table[i].mfpr_run = 0;
+                        mfp_table[i].mfpr_lpm = 0;
+                        offset += 4; i++;
+                } while ((i <= p->end) && (p->end != -1));
+        }
+
+        spin_unlock_irqrestore(&mfp_spin_lock, flags);
+}
+
+void mfp_config_lpm(void)
+{
+        struct mfp_pin *p = &mfp_table[0];
+        int pin;
+
+        for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++, p++)
+                __mfp_config_lpm(p);
+}
+
+void mfp_config_run(void)
+{
+        struct mfp_pin *p = &mfp_table[0];
+        int pin;
+
+        for (pin = 0; pin < ARRAY_SIZE(mfp_table); pin++, p++)
+                __mfp_config_run(p);
+}