Merge branch 'at91' into devel

3 files changed, 1520 insertions, 0 deletions

diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig
index 5f2f9dc43e3b..6d5a50bcabe6 100644
--- a/drivers/pinctrl/Kconfig
+++ b/drivers/pinctrl/Kconfig
@@ -26,6 +26,15 @@ config DEBUG_PINCTRL
         help
           Say Y here to add some extra checks and diagnostics to PINCTRL calls.
 
+config PINCTRL_AT91
+        bool "AT91 pinctrl driver"
+        depends on OF
+        depends on ARCH_AT91
+        select PINMUX
+        select PINCONF
+        help
+          Say Y here to enable the at91 pinctrl driver
+
 config PINCTRL_BCM2835
         bool
         select PINMUX
diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile
index 3cb6a0a668a8..f95f5ed923be 100644
--- a/drivers/pinctrl/Makefile
+++ b/drivers/pinctrl/Makefile
@@ -9,6 +9,7 @@ ifeq ($(CONFIG_OF),y)
 obj-$(CONFIG_PINCTRL)           += devicetree.o
 endif
 obj-$(CONFIG_GENERIC_PINCONF)   += pinconf-generic.o
+obj-$(CONFIG_PINCTRL_AT91)      += pinctrl-at91.o
 obj-$(CONFIG_PINCTRL_BCM2835)   += pinctrl-bcm2835.o
 obj-$(CONFIG_PINCTRL_IMX)       += pinctrl-imx.o
 obj-$(CONFIG_PINCTRL_IMX35)     += pinctrl-imx35.o
diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
new file mode 100644
index 000000000000..b9e2cbd2ea7b
--- /dev/null
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -0,0 +1,1510 @@
+/*
+ * at91 pinctrl driver based on at91 pinmux core
+ *
+ * Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ *
+ * Under GPLv2 only
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/pinctrl/machine.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/pinctrl.h>
+#include <linux/pinctrl/pinmux.h>
+/* Since we request GPIOs from ourself */
+#include <linux/pinctrl/consumer.h>
+
+#include <asm/mach/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/at91_pio.h>
+
+#include "core.h"
+
+#define MAX_NB_GPIO_PER_BANK    32
+
+struct at91_pinctrl_mux_ops;
+
+struct at91_gpio_chip {
+        struct gpio_chip        chip;
+        struct pinctrl_gpio_range range;
+        struct at91_gpio_chip   *next;          /* Bank sharing same clock */
+        int                     pioc_hwirq;     /* PIO bank interrupt identifier on AIC */
+        int                     pioc_virq;      /* PIO bank Linux virtual interrupt */
+        int                     pioc_idx;       /* PIO bank index */
+        void __iomem            *regbase;       /* PIO bank virtual address */
+        struct clk              *clock;         /* associated clock */
+        struct irq_domain       *domain;        /* associated irq domain */
+        struct at91_pinctrl_mux_ops *ops;       /* ops */
+};
+
+#define to_at91_gpio_chip(c) container_of(c, struct at91_gpio_chip, chip)
+
+static struct at91_gpio_chip *gpio_chips[MAX_GPIO_BANKS];
+
+static int gpio_banks;
+
+#define PULL_UP         (1 << 0)
+#define MULTI_DRIVE     (1 << 1)
+
+/**
+ * struct at91_pmx_func - describes AT91 pinmux functions
+ * @name: the name of this specific function
+ * @groups: corresponding pin groups
+ * @ngroups: the number of groups
+ */
+struct at91_pmx_func {
+        const char      *name;
+        const char      **groups;
+        unsigned        ngroups;
+};
+
+enum at91_mux {
+        AT91_MUX_GPIO = 0,
+        AT91_MUX_PERIPH_A = 1,
+        AT91_MUX_PERIPH_B = 2,
+        AT91_MUX_PERIPH_C = 3,
+        AT91_MUX_PERIPH_D = 4,
+};
+
+/**
+ * struct at91_pmx_pin - describes an At91 pin mux
+ * @bank: the bank of the pin
+ * @pin: the pin number in the @bank
+ * @mux: the mux mode : gpio or periph_x of the pin i.e. alternate function.
+ * @conf: the configuration of the pin: PULL_UP, MULTIDRIVE etc...
+ */
+struct at91_pmx_pin {
+        uint32_t        bank;
+        uint32_t        pin;
+        enum at91_mux   mux;
+        unsigned long   conf;
+};
+
+/**
+ * struct at91_pin_group - describes an At91 pin group
+ * @name: the name of this specific pin group
+ * @pins_conf: the mux mode for each pin in this group. The size of this
+ *      array is the same as pins.
+ * @pins: an array of discrete physical pins used in this group, taken
+ *      from the driver-local pin enumeration space
+ * @npins: the number of pins in this group array, i.e. the number of
+ *      elements in .pins so we can iterate over that array
+ */
+struct at91_pin_group {
+        const char              *name;
+        struct at91_pmx_pin     *pins_conf;
+        unsigned int            *pins;
+        unsigned                npins;
+};
+
+/**
+ * struct at91_pinctrl_mux_ops - describes an At91 mux ops group
+ * on new IP with support for periph C and D the way to mux in
+ * periph A and B has changed
+ * So provide the right call back
+ * if not present means the IP does not support it
+ * @get_periph: return the periph mode configured
+ * @mux_A_periph: mux as periph A
+ * @mux_B_periph: mux as periph B
+ * @mux_C_periph: mux as periph C
+ * @mux_D_periph: mux as periph D
+ * @irq_type: return irq type
+ */
+struct at91_pinctrl_mux_ops {
+        enum at91_mux (*get_periph)(void __iomem *pio, unsigned mask);
+        void (*mux_A_periph)(void __iomem *pio, unsigned mask);
+        void (*mux_B_periph)(void __iomem *pio, unsigned mask);
+        void (*mux_C_periph)(void __iomem *pio, unsigned mask);
+        void (*mux_D_periph)(void __iomem *pio, unsigned mask);
+        /* irq */
+        int (*irq_type)(struct irq_data *d, unsigned type);
+};
+
+static int gpio_irq_type(struct irq_data *d, unsigned type);
+static int alt_gpio_irq_type(struct irq_data *d, unsigned type);
+
+struct at91_pinctrl {
+        struct device           *dev;
+        struct pinctrl_dev      *pctl;
+
+        int                     nbanks;
+
+        uint32_t                *mux_mask;
+        int                     nmux;
+
+        struct at91_pmx_func    *functions;
+        int                     nfunctions;
+
+        struct at91_pin_group   *groups;
+        int                     ngroups;
+
+        struct at91_pinctrl_mux_ops *ops;
+};
+
+static const inline struct at91_pin_group *at91_pinctrl_find_group_by_name(
+                                const struct at91_pinctrl *info,
+                                const char *name)
+{
+        const struct at91_pin_group *grp = NULL;
+        int i;
+
+        for (i = 0; i < info->ngroups; i++) {
+                if (strcmp(info->groups[i].name, name))
+                        continue;
+
+                grp = &info->groups[i];
+                dev_dbg(info->dev, "%s: %d 0:%d\n", name, grp->npins, grp->pins[0]);
+                break;
+        }
+
+        return grp;
+}
+
+static int at91_get_groups_count(struct pinctrl_dev *pctldev)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+        return info->ngroups;
+}
+
+static const char *at91_get_group_name(struct pinctrl_dev *pctldev,
+                                       unsigned selector)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+        return info->groups[selector].name;
+}
+
+static int at91_get_group_pins(struct pinctrl_dev *pctldev, unsigned selector,
+                               const unsigned **pins,
+                               unsigned *npins)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+        if (selector >= info->ngroups)
+                return -EINVAL;
+
+        *pins = info->groups[selector].pins;
+        *npins = info->groups[selector].npins;
+
+        return 0;
+}
+
+static void at91_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+                   unsigned offset)
+{
+        seq_printf(s, "%s", dev_name(pctldev->dev));
+}
+
+static int at91_dt_node_to_map(struct pinctrl_dev *pctldev,
+                        struct device_node *np,
+                        struct pinctrl_map **map, unsigned *num_maps)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+        const struct at91_pin_group *grp;
+        struct pinctrl_map *new_map;
+        struct device_node *parent;
+        int map_num = 1;
+        int i;
+
+        /*
+         * first find the group of this node and check if we need create
+         * config maps for pins
+         */
+        grp = at91_pinctrl_find_group_by_name(info, np->name);
+        if (!grp) {
+                dev_err(info->dev, "unable to find group for node %s\n",
+                        np->name);
+                return -EINVAL;
+        }
+
+        map_num += grp->npins;
+        new_map = devm_kzalloc(pctldev->dev, sizeof(*new_map) * map_num, GFP_KERNEL);
+        if (!new_map)
+                return -ENOMEM;
+
+        *map = new_map;
+        *num_maps = map_num;
+
+        /* create mux map */
+        parent = of_get_parent(np);
+        if (!parent) {
+                kfree(new_map);
+                return -EINVAL;
+        }
+        new_map[0].type = PIN_MAP_TYPE_MUX_GROUP;
+        new_map[0].data.mux.function = parent->name;
+        new_map[0].data.mux.group = np->name;
+        of_node_put(parent);
+
+        /* create config map */
+        new_map++;
+        for (i = 0; i < grp->npins; i++) {
+                new_map[i].type = PIN_MAP_TYPE_CONFIGS_PIN;
+                new_map[i].data.configs.group_or_pin =
+                                pin_get_name(pctldev, grp->pins[i]);
+                new_map[i].data.configs.configs = &grp->pins_conf[i].conf;
+                new_map[i].data.configs.num_configs = 1;
+        }
+
+        dev_dbg(pctldev->dev, "maps: function %s group %s num %d\n",
+                (*map)->data.mux.function, (*map)->data.mux.group, map_num);
+
+        return 0;
+}
+
+static void at91_dt_free_map(struct pinctrl_dev *pctldev,
+                                struct pinctrl_map *map, unsigned num_maps)
+{
+}
+
+static struct pinctrl_ops at91_pctrl_ops = {
+        .get_groups_count       = at91_get_groups_count,
+        .get_group_name         = at91_get_group_name,
+        .get_group_pins         = at91_get_group_pins,
+        .pin_dbg_show           = at91_pin_dbg_show,
+        .dt_node_to_map         = at91_dt_node_to_map,
+        .dt_free_map            = at91_dt_free_map,
+};
+
+static void __iomem * pin_to_controller(struct at91_pinctrl *info,
+                                 unsigned int bank)
+{
+        return gpio_chips[bank]->regbase;
+}
+
+static inline int pin_to_bank(unsigned pin)
+{
+        return pin /= MAX_NB_GPIO_PER_BANK;
+}
+
+static unsigned pin_to_mask(unsigned int pin)
+{
+        return 1 << pin;
+}
+
+static void at91_mux_disable_interrupt(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(mask, pio + PIO_IDR);
+}
+
+static unsigned at91_mux_get_pullup(void __iomem *pio, unsigned pin)
+{
+        return (readl_relaxed(pio + PIO_PUSR) >> pin) & 0x1;
+}
+
+static void at91_mux_set_pullup(void __iomem *pio, unsigned mask, bool on)
+{
+        writel_relaxed(mask, pio + (on ? PIO_PUER : PIO_PUDR));
+}
+
+static unsigned at91_mux_get_multidrive(void __iomem *pio, unsigned pin)
+{
+        return (readl_relaxed(pio + PIO_MDSR) >> pin) & 0x1;
+}
+
+static void at91_mux_set_multidrive(void __iomem *pio, unsigned mask, bool on)
+{
+        writel_relaxed(mask, pio + (on ? PIO_MDER : PIO_MDDR));
+}
+
+static void at91_mux_set_A_periph(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(mask, pio + PIO_ASR);
+}
+
+static void at91_mux_set_B_periph(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(mask, pio + PIO_BSR);
+}
+
+static void at91_mux_pio3_set_A_periph(void __iomem *pio, unsigned mask)
+{
+
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask,
+                                                pio + PIO_ABCDSR1);
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask,
+                                                pio + PIO_ABCDSR2);
+}
+
+static void at91_mux_pio3_set_B_periph(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask,
+                                                pio + PIO_ABCDSR1);
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) & ~mask,
+                                                pio + PIO_ABCDSR2);
+}
+
+static void at91_mux_pio3_set_C_periph(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) & ~mask, pio + PIO_ABCDSR1);
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2);
+}
+
+static void at91_mux_pio3_set_D_periph(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR1) | mask, pio + PIO_ABCDSR1);
+        writel_relaxed(readl_relaxed(pio + PIO_ABCDSR2) | mask, pio + PIO_ABCDSR2);
+}
+
+static enum at91_mux at91_mux_pio3_get_periph(void __iomem *pio, unsigned mask)
+{
+        unsigned select;
+
+        if (readl_relaxed(pio + PIO_PSR) & mask)
+                return AT91_MUX_GPIO;
+
+        select = !!(readl_relaxed(pio + PIO_ABCDSR1) & mask);
+        select |= (!!(readl_relaxed(pio + PIO_ABCDSR2) & mask) << 1);
+
+        return select + 1;
+}
+
+static enum at91_mux at91_mux_get_periph(void __iomem *pio, unsigned mask)
+{
+        unsigned select;
+
+        if (readl_relaxed(pio + PIO_PSR) & mask)
+                return AT91_MUX_GPIO;
+
+        select = readl_relaxed(pio + PIO_ABSR) & mask;
+
+        return select + 1;
+}
+
+static struct at91_pinctrl_mux_ops at91rm9200_ops = {
+        .get_periph     = at91_mux_get_periph,
+        .mux_A_periph   = at91_mux_set_A_periph,
+        .mux_B_periph   = at91_mux_set_B_periph,
+        .irq_type       = gpio_irq_type,
+};
+
+static struct at91_pinctrl_mux_ops at91sam9x5_ops = {
+        .get_periph     = at91_mux_pio3_get_periph,
+        .mux_A_periph   = at91_mux_pio3_set_A_periph,
+        .mux_B_periph   = at91_mux_pio3_set_B_periph,
+        .mux_C_periph   = at91_mux_pio3_set_C_periph,
+        .mux_D_periph   = at91_mux_pio3_set_D_periph,
+        .irq_type       = alt_gpio_irq_type,
+};
+
+static void at91_pin_dbg(const struct device *dev, const struct at91_pmx_pin *pin)
+{
+        if (pin->mux) {
+                dev_dbg(dev, "pio%c%d configured as periph%c with conf = 0x%lu\n",
+                        pin->bank + 'A', pin->pin, pin->mux - 1 + 'A', pin->conf);
+        } else {
+                dev_dbg(dev, "pio%c%d configured as gpio with conf = 0x%lu\n",
+                        pin->bank + 'A', pin->pin, pin->conf);
+        }
+}
+
+static int pin_check_config(struct at91_pinctrl *info, const char* name,
+                            int index, const struct at91_pmx_pin *pin)
+{
+        int mux;
+
+        /* check if it's a valid config */
+        if (pin->bank >= info->nbanks) {
+                dev_err(info->dev, "%s: pin conf %d bank_id %d >= nbanks %d\n",
+                        name, index, pin->bank, info->nbanks);
+                return -EINVAL;
+        }
+
+        if (pin->pin >= MAX_NB_GPIO_PER_BANK) {
+                dev_err(info->dev, "%s: pin conf %d pin_bank_id %d >= %d\n",
+                        name, index, pin->pin, MAX_NB_GPIO_PER_BANK);
+                return -EINVAL;
+        }
+
+        if (!pin->mux)
+                return 0;
+
+        mux = pin->mux - 1;
+
+        if (mux >= info->nmux) {
+                dev_err(info->dev, "%s: pin conf %d mux_id %d >= nmux %d\n",
+                        name, index, mux, info->nmux);
+                return -EINVAL;
+        }
+
+        if (!(info->mux_mask[pin->bank * info->nmux + mux] & 1 << pin->pin)) {
+                dev_err(info->dev, "%s: pin conf %d mux_id %d not supported for pio%c%d\n",
+                        name, index, mux, pin->bank + 'A', pin->pin);
+                return -EINVAL;
+        }
+
+        return 0;
+}
+
+static void at91_mux_gpio_disable(void __iomem *pio, unsigned mask)
+{
+        writel_relaxed(mask, pio + PIO_PDR);
+}
+
+static void at91_mux_gpio_enable(void __iomem *pio, unsigned mask, bool input)
+{
+        writel_relaxed(mask, pio + PIO_PER);
+        writel_relaxed(mask, pio + (input ? PIO_ODR : PIO_OER));
+}
+
+static int at91_pmx_enable(struct pinctrl_dev *pctldev, unsigned selector,
+                           unsigned group)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+        const struct at91_pmx_pin *pins_conf = info->groups[group].pins_conf;
+        const struct at91_pmx_pin *pin;
+        uint32_t npins = info->groups[group].npins;
+        int i, ret;
+        unsigned mask;
+        void __iomem *pio;
+
+        dev_dbg(info->dev, "enable function %s group %s\n",
+                info->functions[selector].name, info->groups[group].name);
+
+        /* first check that all the pins of the group are valid with a valid
+         * paramter */
+        for (i = 0; i < npins; i++) {
+                pin = &pins_conf[i];
+                ret = pin_check_config(info, info->groups[group].name, i, pin);
+                if (ret)
+                        return ret;
+        }
+
+        for (i = 0; i < npins; i++) {
+                pin = &pins_conf[i];
+                at91_pin_dbg(info->dev, pin);
+                pio = pin_to_controller(info, pin->bank);
+                mask = pin_to_mask(pin->pin);
+                at91_mux_disable_interrupt(pio, mask);
+                switch(pin->mux) {
+                case AT91_MUX_GPIO:
+                        at91_mux_gpio_enable(pio, mask, 1);
+                        break;
+                case AT91_MUX_PERIPH_A:
+                        info->ops->mux_A_periph(pio, mask);
+                        break;
+                case AT91_MUX_PERIPH_B:
+                        info->ops->mux_B_periph(pio, mask);
+                        break;
+                case AT91_MUX_PERIPH_C:
+                        if (!info->ops->mux_C_periph)
+                                return -EINVAL;
+                        info->ops->mux_C_periph(pio, mask);
+                        break;
+                case AT91_MUX_PERIPH_D:
+                        if (!info->ops->mux_D_periph)
+                                return -EINVAL;
+                        info->ops->mux_D_periph(pio, mask);
+                        break;
+                }
+                if (pin->mux)
+                        at91_mux_gpio_disable(pio, mask);
+        }
+
+        return 0;
+}
+
+static void at91_pmx_disable(struct pinctrl_dev *pctldev, unsigned selector,
+                           unsigned group)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+        const struct at91_pmx_pin *pins_conf = info->groups[group].pins_conf;
+        const struct at91_pmx_pin *pin;
+        uint32_t npins = info->groups[group].npins;
+        int i;
+        unsigned mask;
+        void __iomem *pio;
+
+        for (i = 0; i < npins; i++) {
+                pin = &pins_conf[i];
+                at91_pin_dbg(info->dev, pin);
+                pio = pin_to_controller(info, pin->bank);
+                mask = pin_to_mask(pin->pin);
+                at91_mux_gpio_enable(pio, mask, 1);
+        }
+}
+
+static int at91_pmx_get_funcs_count(struct pinctrl_dev *pctldev)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+        return info->nfunctions;
+}
+
+static const char *at91_pmx_get_func_name(struct pinctrl_dev *pctldev,
+                                          unsigned selector)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+        return info->functions[selector].name;
+}
+
+static int at91_pmx_get_groups(struct pinctrl_dev *pctldev, unsigned selector,
+                               const char * const **groups,
+                               unsigned * const num_groups)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+
+        *groups = info->functions[selector].groups;
+        *num_groups = info->functions[selector].ngroups;
+
+        return 0;
+}
+
+static int at91_gpio_request_enable(struct pinctrl_dev *pctldev,
+                                    struct pinctrl_gpio_range *range,
+                                    unsigned offset)
+{
+        struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
+        struct at91_gpio_chip *at91_chip;
+        struct gpio_chip *chip;
+        unsigned mask;
+
+        if (!range) {
+                dev_err(npct->dev, "invalid range\n");
+                return -EINVAL;
+        }
+        if (!range->gc) {
+                dev_err(npct->dev, "missing GPIO chip in range\n");
+                return -EINVAL;
+        }
+        chip = range->gc;
+        at91_chip = container_of(chip, struct at91_gpio_chip, chip);
+
+        dev_dbg(npct->dev, "enable pin %u as GPIO\n", offset);
+
+        mask = 1 << (offset - chip->base);
+
+        dev_dbg(npct->dev, "enable pin %u as PIO%c%d 0x%x\n",
+                offset, 'A' + range->id, offset - chip->base, mask);
+
+        writel_relaxed(mask, at91_chip->regbase + PIO_PER);
+
+        return 0;
+}
+
+static void at91_gpio_disable_free(struct pinctrl_dev *pctldev,
+                                   struct pinctrl_gpio_range *range,
+                                   unsigned offset)
+{
+        struct at91_pinctrl *npct = pinctrl_dev_get_drvdata(pctldev);
+
+        dev_dbg(npct->dev, "disable pin %u as GPIO\n", offset);
+        /* Set the pin to some default state, GPIO is usually default */
+}
+
+static struct pinmux_ops at91_pmx_ops = {
+        .get_functions_count    = at91_pmx_get_funcs_count,
+        .get_function_name      = at91_pmx_get_func_name,
+        .get_function_groups    = at91_pmx_get_groups,
+        .enable                 = at91_pmx_enable,
+        .disable                = at91_pmx_disable,
+        .gpio_request_enable    = at91_gpio_request_enable,
+        .gpio_disable_free      = at91_gpio_disable_free,
+};
+
+static int at91_pinconf_get(struct pinctrl_dev *pctldev,
+                             unsigned pin_id, unsigned long *config)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+        void __iomem *pio;
+        unsigned pin;
+
+        dev_dbg(info->dev, "%s:%d, pin_id=%d, config=0x%lx", __func__, __LINE__, pin_id, *config);
+        pio = pin_to_controller(info, pin_to_bank(pin_id));
+        pin = pin_id % MAX_NB_GPIO_PER_BANK;
+
+        if (at91_mux_get_multidrive(pio, pin))
+                *config |= MULTI_DRIVE;
+
+        if (at91_mux_get_pullup(pio, pin))
+                *config |= PULL_UP;
+
+        return 0;
+}
+
+static int at91_pinconf_set(struct pinctrl_dev *pctldev,
+                             unsigned pin_id, unsigned long config)
+{
+        struct at91_pinctrl *info = pinctrl_dev_get_drvdata(pctldev);
+        unsigned mask;
+        void __iomem *pio;
+
+        dev_dbg(info->dev, "%s:%d, pin_id=%d, config=0x%lx", __func__, __LINE__, pin_id, config);
+        pio = pin_to_controller(info, pin_to_bank(pin_id));
+        mask = pin_to_mask(pin_id % MAX_NB_GPIO_PER_BANK);
+
+        at91_mux_set_pullup(pio, mask, config & PULL_UP);
+        at91_mux_set_multidrive(pio, mask, config & MULTI_DRIVE);
+        return 0;
+}
+
+static void at91_pinconf_dbg_show(struct pinctrl_dev *pctldev,
+                                   struct seq_file *s, unsigned pin_id)
+{
+
+}
+
+static void at91_pinconf_group_dbg_show(struct pinctrl_dev *pctldev,
+                                         struct seq_file *s, unsigned group)
+{
+}
+
+struct pinconf_ops at91_pinconf_ops = {
+        .pin_config_get                 = at91_pinconf_get,
+        .pin_config_set                 = at91_pinconf_set,
+        .pin_config_dbg_show            = at91_pinconf_dbg_show,
+        .pin_config_group_dbg_show      = at91_pinconf_group_dbg_show,
+};
+
+static struct pinctrl_desc at91_pinctrl_desc = {
+        .pctlops        = &at91_pctrl_ops,
+        .pmxops         = &at91_pmx_ops,
+        .confops        = &at91_pinconf_ops,
+        .owner          = THIS_MODULE,
+};
+
+static const char *gpio_compat = "atmel,at91rm9200-gpio";
+
+static void __devinit at91_pinctrl_child_count(struct at91_pinctrl *info,
+                                              struct device_node *np)
+{
+        struct device_node *child;
+
+        for_each_child_of_node(np, child) {
+                if (of_device_is_compatible(child, gpio_compat)) {
+                        info->nbanks++;
+                } else {
+                        info->nfunctions++;
+                        info->ngroups += of_get_child_count(child);
+                }
+        }
+}
+
+static int __devinit at91_pinctrl_mux_mask(struct at91_pinctrl *info,
+                                          struct device_node *np)
+{
+        int ret = 0;
+        int size;
+        const const __be32 *list;
+
+        list = of_get_property(np, "atmel,mux-mask", &size);
+        if (!list) {
+                dev_err(info->dev, "can not read the mux-mask of %d\n", size);
+                return -EINVAL;
+        }
+
+        size /= sizeof(*list);
+        if (!size || size % info->nbanks) {
+                dev_err(info->dev, "wrong mux mask array should be by %d\n", info->nbanks);
+                return -EINVAL;
+        }
+        info->nmux = size / info->nbanks;
+
+        info->mux_mask = devm_kzalloc(info->dev, sizeof(u32) * size, GFP_KERNEL);
+        if (!info->mux_mask) {
+                dev_err(info->dev, "could not alloc mux_mask\n");
+                return -ENOMEM;
+        }
+
+        ret = of_property_read_u32_array(np, "atmel,mux-mask",
+                                          info->mux_mask, size);
+        if (ret)
+                dev_err(info->dev, "can not read the mux-mask of %d\n", size);
+        return ret;
+}
+
+static int __devinit at91_pinctrl_parse_groups(struct device_node *np,
+                                struct at91_pin_group *grp,
+                                struct at91_pinctrl *info,
+                                u32 index)
+{
+        struct at91_pmx_pin *pin;
+        int size;
+        const const __be32 *list;
+        int i, j;
+
+        dev_dbg(info->dev, "group(%d): %s\n", index, np->name);
+
+        /* Initialise group */
+        grp->name = np->name;
+
+        /*
+         * the binding format is atmel,pins = <bank pin mux CONFIG ...>,
+         * do sanity check and calculate pins number
+         */
+        list = of_get_property(np, "atmel,pins", &size);
+        /* we do not check return since it's safe node passed down */
+        size /= sizeof(*list);
+        if (!size || size % 4) {
+                dev_err(info->dev, "wrong pins number or pins and configs should be by 4\n");
+                return -EINVAL;
+        }
+
+        grp->npins = size / 4;
+        pin = grp->pins_conf = devm_kzalloc(info->dev, grp->npins * sizeof(struct at91_pmx_pin),
+                                GFP_KERNEL);
+        grp->pins = devm_kzalloc(info->dev, grp->npins * sizeof(unsigned int),
+                                GFP_KERNEL);
+        if (!grp->pins_conf || !grp->pins)
+                return -ENOMEM;
+
+        for (i = 0, j = 0; i < size; i += 4, j++) {
+                pin->bank = be32_to_cpu(*list++);
+                pin->pin = be32_to_cpu(*list++);
+                grp->pins[j] = pin->bank * MAX_NB_GPIO_PER_BANK + pin->pin;
+                pin->mux = be32_to_cpu(*list++);
+                pin->conf = be32_to_cpu(*list++);
+
+                at91_pin_dbg(info->dev, pin);
+                pin++;
+        }
+
+        return 0;
+}
+
+static int __devinit at91_pinctrl_parse_functions(struct device_node *np,
+                        struct at91_pinctrl *info, u32 index)
+{
+        struct device_node *child;
+        struct at91_pmx_func *func;
+        struct at91_pin_group *grp;
+        int ret;
+        static u32 grp_index;
+        u32 i = 0;
+
+        dev_dbg(info->dev, "parse function(%d): %s\n", index, np->name);
+
+        func = &info->functions[index];
+
+        /* Initialise function */
+        func->name = np->name;
+        func->ngroups = of_get_child_count(np);
+        if (func->ngroups <= 0) {
+                dev_err(info->dev, "no groups defined\n");
+                return -EINVAL;
+        }
+        func->groups = devm_kzalloc(info->dev,
+                        func->ngroups * sizeof(char *), GFP_KERNEL);
+        if (!func->groups)
+                return -ENOMEM;
+
+        for_each_child_of_node(np, child) {
+                func->groups[i] = child->name;
+                grp = &info->groups[grp_index++];
+                ret = at91_pinctrl_parse_groups(child, grp, info, i++);
+                if (ret)
+                        return ret;
+        }
+
+        return 0;
+}
+
+static struct of_device_id at91_pinctrl_of_match[] __devinitdata = {
+        { .compatible = "atmel,at91sam9x5-pinctrl", .data = &at91sam9x5_ops },
+        { .compatible = "atmel,at91rm9200-pinctrl", .data = &at91rm9200_ops },
+        { /* sentinel */ }
+};
+
+static int __devinit at91_pinctrl_probe_dt(struct platform_device *pdev,
+                                           struct at91_pinctrl *info)
+{
+        int ret = 0;
+        int i, j;
+        uint32_t *tmp;
+        struct device_node *np = pdev->dev.of_node;
+        struct device_node *child;
+
+        if (!np)
+                return -ENODEV;
+
+        info->dev = &pdev->dev;
+        info->ops = (struct at91_pinctrl_mux_ops*)
+                of_match_device(at91_pinctrl_of_match, &pdev->dev)->data;
+        at91_pinctrl_child_count(info, np);
+
+        if (info->nbanks < 1) {
+                dev_err(&pdev->dev, "you need to specify atleast one gpio-controller\n");
+                return -EINVAL;
+        }
+
+        ret = at91_pinctrl_mux_mask(info, np);
+        if (ret)
+                return ret;
+
+        dev_dbg(&pdev->dev, "nmux = %d\n", info->nmux);
+
+        dev_dbg(&pdev->dev, "mux-mask\n");
+        tmp = info->mux_mask;
+        for (i = 0; i < info->nbanks; i++) {
+                for (j = 0; j < info->nmux; j++, tmp++) {
+                        dev_dbg(&pdev->dev, "%d:%d\t0x%x\n", i, j, tmp[0]);
+                }
+        }
+
+        dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
+        dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
+        info->functions = devm_kzalloc(&pdev->dev, info->nfunctions * sizeof(struct at91_pmx_func),
+                                        GFP_KERNEL);
+        if (!info->functions)
+                return -ENOMEM;
+
+        info->groups = devm_kzalloc(&pdev->dev, info->ngroups * sizeof(struct at91_pin_group),
+                                        GFP_KERNEL);
+        if (!info->groups)
+                return -ENOMEM;
+
+        dev_dbg(&pdev->dev, "nbanks = %d\n", info->nbanks);
+        dev_dbg(&pdev->dev, "nfunctions = %d\n", info->nfunctions);
+        dev_dbg(&pdev->dev, "ngroups = %d\n", info->ngroups);
+
+        i = 0;
+
+        for_each_child_of_node(np, child) {
+                if (of_device_is_compatible(child, gpio_compat))
+                        continue;
+                ret = at91_pinctrl_parse_functions(child, info, i++);
+                if (ret) {
+                        dev_err(&pdev->dev, "failed to parse function\n");
+                        return ret;
+                }
+        }
+
+        return 0;
+}
+
+static int __devinit at91_pinctrl_probe(struct platform_device *pdev)
+{
+        struct at91_pinctrl *info;
+        struct pinctrl_pin_desc *pdesc;
+        int ret, i, j ,k;
+
+        info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+        if (!info)
+                return -ENOMEM;
+
+        ret = at91_pinctrl_probe_dt(pdev, info);
+        if (ret)
+                return ret;
+
+        /*
+         * We need all the GPIO drivers to probe FIRST, or we will not be able
+         * to obtain references to the struct gpio_chip * for them, and we
+         * need this to proceed.
+         */
+        for (i = 0; i < info->nbanks; i++) {
+                if (!gpio_chips[i]) {
+                        dev_warn(&pdev->dev, "GPIO chip %d not registered yet\n", i);
+                        devm_kfree(&pdev->dev, info);
+                        return -EPROBE_DEFER;
+                }
+        }
+
+        at91_pinctrl_desc.name = dev_name(&pdev->dev);
+        at91_pinctrl_desc.npins = info->nbanks * MAX_NB_GPIO_PER_BANK;
+        at91_pinctrl_desc.pins = pdesc =
+                devm_kzalloc(&pdev->dev, sizeof(*pdesc) * at91_pinctrl_desc.npins, GFP_KERNEL);
+
+        if (!at91_pinctrl_desc.pins)
+                return -ENOMEM;
+
+        for (i = 0 , k = 0; i < info->nbanks; i++) {
+                for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
+                        pdesc->number = k;
+                        pdesc->name = kasprintf(GFP_KERNEL, "pio%c%d", i + 'A', j);
+                        pdesc++;
+                }
+        }
+
+        platform_set_drvdata(pdev, info);
+        info->pctl = pinctrl_register(&at91_pinctrl_desc, &pdev->dev, info);
+
+        if (!info->pctl) {
+                dev_err(&pdev->dev, "could not register AT91 pinctrl driver\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
+        /* We will handle a range of GPIO pins */
+        for (i = 0; i < info->nbanks; i++)
+                pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
+
+        dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
+
+        return 0;
+
+err:
+        return ret;
+}
+
+static int __devexit at91_pinctrl_remove(struct platform_device *pdev)
+{
+        struct at91_pinctrl *info = platform_get_drvdata(pdev);
+
+        pinctrl_unregister(info->pctl);
+
+        return 0;
+}
+
+static int at91_gpio_request(struct gpio_chip *chip, unsigned offset)
+{
+        /*
+         * Map back to global GPIO space and request muxing, the direction
+         * parameter does not matter for this controller.
+         */
+        int gpio = chip->base + offset;
+        int bank = chip->base / chip->ngpio;
+
+        dev_dbg(chip->dev, "%s:%d pio%c%d(%d)\n", __func__, __LINE__,
+                 'A' + bank, offset, gpio);
+
+        return pinctrl_request_gpio(gpio);
+}
+
+static void at91_gpio_free(struct gpio_chip *chip, unsigned offset)
+{
+        int gpio = chip->base + offset;
+
+        pinctrl_free_gpio(gpio);
+}
+
+static int at91_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+        struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+        void __iomem *pio = at91_gpio->regbase;
+        unsigned mask = 1 << offset;
+
+        writel_relaxed(mask, pio + PIO_ODR);
+        return 0;
+}
+
+static int at91_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+        struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+        void __iomem *pio = at91_gpio->regbase;
+        unsigned mask = 1 << offset;
+        u32 pdsr;
+
+        pdsr = readl_relaxed(pio + PIO_PDSR);
+        return (pdsr & mask) != 0;
+}
+
+static void at91_gpio_set(struct gpio_chip *chip, unsigned offset,
+                                int val)
+{
+        struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+        void __iomem *pio = at91_gpio->regbase;
+        unsigned mask = 1 << offset;
+
+        writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
+}
+
+static int at91_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
+                                int val)
+{
+        struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+        void __iomem *pio = at91_gpio->regbase;
+        unsigned mask = 1 << offset;
+
+        writel_relaxed(mask, pio + (val ? PIO_SODR : PIO_CODR));
+        writel_relaxed(mask, pio + PIO_OER);
+
+        return 0;
+}
+
+static int at91_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+        struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+        int virq;
+
+        if (offset < chip->ngpio)
+                virq = irq_create_mapping(at91_gpio->domain, offset);
+        else
+                virq = -ENXIO;
+
+        dev_dbg(chip->dev, "%s: request IRQ for GPIO %d, return %d\n",
+                                chip->label, offset + chip->base, virq);
+        return virq;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static void at91_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip)
+{
+        enum at91_mux mode;
+        int i;
+        struct at91_gpio_chip *at91_gpio = to_at91_gpio_chip(chip);
+        void __iomem *pio = at91_gpio->regbase;
+
+        for (i = 0; i < chip->ngpio; i++) {
+                unsigned pin = chip->base + i;
+                unsigned mask = pin_to_mask(pin);
+                const char *gpio_label;
+                u32 pdsr;
+
+                gpio_label = gpiochip_is_requested(chip, i);
+                if (!gpio_label)
+                        continue;
+                mode = at91_gpio->ops->get_periph(pio, mask);
+                seq_printf(s, "[%s] GPIO%s%d: ",
+                           gpio_label, chip->label, i);
+                if (mode == AT91_MUX_GPIO) {
+                        pdsr = readl_relaxed(pio + PIO_PDSR);
+
+                        seq_printf(s, "[gpio] %s\n",
+                                   pdsr & mask ?
+                                   "set" : "clear");
+                } else {
+                        seq_printf(s, "[periph %c]\n",
+                                   mode + 'A' - 1);
+                }
+        }
+}
+#else
+#define at91_gpio_dbg_show      NULL
+#endif
+
+/* Several AIC controller irqs are dispatched through this GPIO handler.
+ * To use any AT91_PIN_* as an externally triggered IRQ, first call
+ * at91_set_gpio_input() then maybe enable its glitch filter.
+ * Then just request_irq() with the pin ID; it works like any ARM IRQ
+ * handler.
+ * First implementation always triggers on rising and falling edges
+ * whereas the newer PIO3 can be additionally configured to trigger on
+ * level, edge with any polarity.
+ *
+ * Alternatively, certain pins may be used directly as IRQ0..IRQ6 after
+ * configuring them with at91_set_a_periph() or at91_set_b_periph().
+ * IRQ0..IRQ6 should be configurable, e.g. level vs edge triggering.
+ */
+
+static void gpio_irq_mask(struct irq_data *d)
+{
+        struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
+        void __iomem    *pio = at91_gpio->regbase;
+        unsigned        mask = 1 << d->hwirq;
+
+        if (pio)
+                writel_relaxed(mask, pio + PIO_IDR);
+}
+
+static void gpio_irq_unmask(struct irq_data *d)
+{
+        struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
+        void __iomem    *pio = at91_gpio->regbase;
+        unsigned        mask = 1 << d->hwirq;
+
+        if (pio)
+                writel_relaxed(mask, pio + PIO_IER);
+}
+
+static int gpio_irq_type(struct irq_data *d, unsigned type)
+{
+        switch (type) {
+        case IRQ_TYPE_NONE:
+        case IRQ_TYPE_EDGE_BOTH:
+                return 0;
+        default:
+                return -EINVAL;
+        }
+}
+
+/* Alternate irq type for PIO3 support */
+static int alt_gpio_irq_type(struct irq_data *d, unsigned type)
+{
+        struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
+        void __iomem    *pio = at91_gpio->regbase;
+        unsigned        mask = 1 << d->hwirq;
+
+        switch (type) {
+        case IRQ_TYPE_EDGE_RISING:
+                writel_relaxed(mask, pio + PIO_ESR);
+                writel_relaxed(mask, pio + PIO_REHLSR);
+                break;
+        case IRQ_TYPE_EDGE_FALLING:
+                writel_relaxed(mask, pio + PIO_ESR);
+                writel_relaxed(mask, pio + PIO_FELLSR);
+                break;
+        case IRQ_TYPE_LEVEL_LOW:
+                writel_relaxed(mask, pio + PIO_LSR);
+                writel_relaxed(mask, pio + PIO_FELLSR);
+                break;
+        case IRQ_TYPE_LEVEL_HIGH:
+                writel_relaxed(mask, pio + PIO_LSR);
+                writel_relaxed(mask, pio + PIO_REHLSR);
+                break;
+        case IRQ_TYPE_EDGE_BOTH:
+                /*
+                 * disable additional interrupt modes:
+                 * fall back to default behavior
+                 */
+                writel_relaxed(mask, pio + PIO_AIMDR);
+                return 0;
+        case IRQ_TYPE_NONE:
+        default:
+                pr_warn("AT91: No type for irq %d\n", gpio_to_irq(d->irq));
+                return -EINVAL;
+        }
+
+        /* enable additional interrupt modes */
+        writel_relaxed(mask, pio + PIO_AIMER);
+
+        return 0;
+}
+
+#ifdef CONFIG_PM
+static int gpio_irq_set_wake(struct irq_data *d, unsigned state)
+{
+        struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(d);
+        unsigned        bank = at91_gpio->pioc_idx;
+
+        if (unlikely(bank >= MAX_GPIO_BANKS))
+                return -EINVAL;
+
+        irq_set_irq_wake(at91_gpio->pioc_virq, state);
+
+        return 0;
+}
+#else
+#define gpio_irq_set_wake       NULL
+#endif
+
+static struct irq_chip gpio_irqchip = {
+        .name           = "GPIO",
+        .irq_disable    = gpio_irq_mask,
+        .irq_mask       = gpio_irq_mask,
+        .irq_unmask     = gpio_irq_unmask,
+        /* .irq_set_type is set dynamically */
+        .irq_set_wake   = gpio_irq_set_wake,
+};
+
+static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+{
+        struct irq_chip *chip = irq_desc_get_chip(desc);
+        struct irq_data *idata = irq_desc_get_irq_data(desc);
+        struct at91_gpio_chip *at91_gpio = irq_data_get_irq_chip_data(idata);
+        void __iomem    *pio = at91_gpio->regbase;
+        unsigned long   isr;
+        int             n;
+
+        chained_irq_enter(chip, desc);
+        for (;;) {
+                /* Reading ISR acks pending (edge triggered) GPIO interrupts.
+                 * When there none are pending, we're finished unless we need
+                 * to process multiple banks (like ID_PIOCDE on sam9263).
+                 */
+                isr = readl_relaxed(pio + PIO_ISR) & readl_relaxed(pio + PIO_IMR);
+                if (!isr) {
+                        if (!at91_gpio->next)
+                                break;
+                        at91_gpio = at91_gpio->next;
+                        pio = at91_gpio->regbase;
+                        continue;
+                }
+
+                for_each_set_bit(n, &isr, BITS_PER_LONG) {
+                        generic_handle_irq(irq_find_mapping(at91_gpio->domain, n));
+                }
+        }
+        chained_irq_exit(chip, desc);
+        /* now it may re-trigger */
+}
+
+/*
+ * This lock class tells lockdep that GPIO irqs are in a different
+ * category than their parents, so it won't report false recursion.
+ */
+static struct lock_class_key gpio_lock_class;
+
+static int at91_gpio_irq_map(struct irq_domain *h, unsigned int virq,
+                                                        irq_hw_number_t hw)
+{
+        struct at91_gpio_chip   *at91_gpio = h->host_data;
+
+        irq_set_lockdep_class(virq, &gpio_lock_class);
+
+        /*
+         * Can use the "simple" and not "edge" handler since it's
+         * shorter, and the AIC handles interrupts sanely.
+         */
+        irq_set_chip_and_handler(virq, &gpio_irqchip,
+                                 handle_simple_irq);
+        set_irq_flags(virq, IRQF_VALID);
+        irq_set_chip_data(virq, at91_gpio);
+
+        return 0;
+}
+
+static int at91_gpio_irq_domain_xlate(struct irq_domain *d,
+                                      struct device_node *ctrlr,
+                                      const u32 *intspec, unsigned int intsize,
+                                      irq_hw_number_t *out_hwirq,
+                                      unsigned int *out_type)
+{
+        struct at91_gpio_chip *at91_gpio = d->host_data;
+        int ret;
+        int pin = at91_gpio->chip.base + intspec[0];
+
+        if (WARN_ON(intsize < 2))
+                return -EINVAL;
+        *out_hwirq = intspec[0];
+        *out_type = intspec[1] & IRQ_TYPE_SENSE_MASK;
+
+        ret = gpio_request(pin, ctrlr->full_name);
+        if (ret)
+                return ret;
+
+        ret = gpio_direction_input(pin);
+        if (ret)
+                return ret;
+
+        return 0;
+}
+
+static struct irq_domain_ops at91_gpio_ops = {
+        .map    = at91_gpio_irq_map,
+        .xlate  = at91_gpio_irq_domain_xlate,
+};
+
+static int at91_gpio_of_irq_setup(struct device_node *node,
+                                  struct at91_gpio_chip *at91_gpio)
+{
+        struct at91_gpio_chip   *prev = NULL;
+        struct irq_data         *d = irq_get_irq_data(at91_gpio->pioc_virq);
+
+        at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
+
+        /* Setup proper .irq_set_type function */
+        gpio_irqchip.irq_set_type = at91_gpio->ops->irq_type;
+
+        /* Disable irqs of this PIO controller */
+        writel_relaxed(~0, at91_gpio->regbase + PIO_IDR);
+
+        /* Setup irq domain */
+        at91_gpio->domain = irq_domain_add_linear(node, at91_gpio->chip.ngpio,
+                                                &at91_gpio_ops, at91_gpio);
+        if (!at91_gpio->domain)
+                panic("at91_gpio.%d: couldn't allocate irq domain (DT).\n",
+                        at91_gpio->pioc_idx);
+
+        /* Setup chained handler */
+        if (at91_gpio->pioc_idx)
+                prev = gpio_chips[at91_gpio->pioc_idx - 1];
+
+        /* The toplevel handler handles one bank of GPIOs, except
+         * on some SoC it can handles up to three...
+         * We only set up the handler for the first of the list.
+         */
+        if (prev && prev->next == at91_gpio)
+                return 0;
+
+        irq_set_chip_data(at91_gpio->pioc_virq, at91_gpio);
+        irq_set_chained_handler(at91_gpio->pioc_virq, gpio_irq_handler);
+
+        return 0;
+}
+
+/* This structure is replicated for each GPIO block allocated at probe time */
+static struct gpio_chip at91_gpio_template = {
+        .request                = at91_gpio_request,
+        .free                   = at91_gpio_free,
+        .direction_input        = at91_gpio_direction_input,
+        .get                    = at91_gpio_get,
+        .direction_output       = at91_gpio_direction_output,
+        .set                    = at91_gpio_set,
+        .to_irq                 = at91_gpio_to_irq,
+        .dbg_show               = at91_gpio_dbg_show,
+        .can_sleep              = 0,
+        .ngpio                  = MAX_NB_GPIO_PER_BANK,
+};
+
+static void __devinit at91_gpio_probe_fixup(void)
+{
+        unsigned i;
+        struct at91_gpio_chip *at91_gpio, *last = NULL;
+
+        for (i = 0; i < gpio_banks; i++) {
+                at91_gpio = gpio_chips[i];
+
+                /*
+                 * GPIO controller are grouped on some SoC:
+                 * PIOC, PIOD and PIOE can share the same IRQ line
+                 */
+                if (last && last->pioc_virq == at91_gpio->pioc_virq)
+                        last->next = at91_gpio;
+                last = at91_gpio;
+        }
+}
+
+static struct of_device_id at91_gpio_of_match[] __devinitdata = {
+        { .compatible = "atmel,at91sam9x5-gpio", .data = &at91sam9x5_ops, },
+        { .compatible = "atmel,at91rm9200-gpio", .data = &at91rm9200_ops },
+        { /* sentinel */ }
+};
+
+static int __devinit at91_gpio_probe(struct platform_device *pdev)
+{
+        struct device_node *np = pdev->dev.of_node;
+        struct resource *res;
+        struct at91_gpio_chip *at91_chip = NULL;
+        struct gpio_chip *chip;
+        struct pinctrl_gpio_range *range;
+        int ret = 0;
+        int irq;
+        int alias_idx = of_alias_get_id(np, "gpio");
+        uint32_t ngpio;
+
+        BUG_ON(alias_idx >= ARRAY_SIZE(gpio_chips));
+        if (gpio_chips[alias_idx]) {
+                ret = -EBUSY;
+                goto err;
+        }
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res) {
+                ret = -ENOENT;
+                goto err;
+        }
+
+        irq = platform_get_irq(pdev, 0);
+        if (irq < 0) {
+                ret = irq;
+                goto err;
+        }
+
+        at91_chip = devm_kzalloc(&pdev->dev, sizeof(*at91_chip), GFP_KERNEL);
+        if (!at91_chip) {
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        at91_chip->regbase = devm_request_and_ioremap(&pdev->dev, res);
+        if (!at91_chip->regbase) {
+                dev_err(&pdev->dev, "failed to map registers, ignoring.\n");
+                ret = -EBUSY;
+                goto err;
+        }
+
+        at91_chip->ops = (struct at91_pinctrl_mux_ops*)
+                of_match_device(at91_gpio_of_match, &pdev->dev)->data;
+        at91_chip->pioc_virq = irq;
+        at91_chip->pioc_idx = alias_idx;
+
+        at91_chip->clock = clk_get(&pdev->dev, NULL);
+        if (IS_ERR(at91_chip->clock)) {
+                dev_err(&pdev->dev, "failed to get clock, ignoring.\n");
+                goto err;
+        }
+
+        if (clk_prepare(at91_chip->clock))
+                goto clk_prep_err;
+
+        /* enable PIO controller's clock */
+        if (clk_enable(at91_chip->clock)) {
+                dev_err(&pdev->dev, "failed to enable clock, ignoring.\n");
+                goto clk_err;
+        }
+
+        at91_chip->chip = at91_gpio_template;
+
+        chip = &at91_chip->chip;
+        chip->of_node = np;
+        chip->label = dev_name(&pdev->dev);
+        chip->dev = &pdev->dev;
+        chip->owner = THIS_MODULE;
+        chip->base = alias_idx * MAX_NB_GPIO_PER_BANK;
+
+        if (!of_property_read_u32(np, "#gpio-lines", &ngpio)) {
+                if (ngpio >= MAX_NB_GPIO_PER_BANK)
+                        pr_err("at91_gpio.%d, gpio-nb >= %d failback to %d\n",
+                               alias_idx, MAX_NB_GPIO_PER_BANK, MAX_NB_GPIO_PER_BANK);
+                else
+                        chip->ngpio = ngpio;
+        }
+
+        range = &at91_chip->range;
+        range->name = chip->label;
+        range->id = alias_idx;
+        range->pin_base = range->base = range->id * MAX_NB_GPIO_PER_BANK;
+
+        range->npins = chip->ngpio;
+        range->gc = chip;
+
+        ret = gpiochip_add(chip);
+        if (ret)
+                goto clk_err;
+
+        gpio_chips[alias_idx] = at91_chip;
+        gpio_banks = max(gpio_banks, alias_idx + 1);
+
+        at91_gpio_probe_fixup();
+
+        at91_gpio_of_irq_setup(np, at91_chip);
+
+        dev_info(&pdev->dev, "at address %p\n", at91_chip->regbase);
+
+        return 0;
+
+clk_err:
+        clk_unprepare(at91_chip->clock);
+clk_prep_err:
+        clk_put(at91_chip->clock);
+err:
+        dev_err(&pdev->dev, "Failure %i for GPIO %i\n", ret, alias_idx);
+
+        return ret;
+}
+
+static struct platform_driver at91_gpio_driver = {
+        .driver = {
+                .name = "gpio-at91",
+                .owner = THIS_MODULE,
+                .of_match_table = of_match_ptr(at91_gpio_of_match),
+        },
+        .probe = at91_gpio_probe,
+};
+
+static struct platform_driver at91_pinctrl_driver = {
+        .driver = {
+                .name = "pinctrl-at91",
+                .owner = THIS_MODULE,
+                .of_match_table = of_match_ptr(at91_pinctrl_of_match),
+        },
+        .probe = at91_pinctrl_probe,
+        .remove = __devexit_p(at91_pinctrl_remove),
+};
+
+static int __init at91_pinctrl_init(void)
+{
+        int ret;
+
+        ret = platform_driver_register(&at91_gpio_driver);
+        if (ret)
+                return ret;
+        return platform_driver_register(&at91_pinctrl_driver);
+}
+arch_initcall(at91_pinctrl_init);
+
+static void __exit at91_pinctrl_exit(void)
+{
+        platform_driver_unregister(&at91_pinctrl_driver);
+}
+
+module_exit(at91_pinctrl_exit);
+MODULE_AUTHOR("Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>");
+MODULE_DESCRIPTION("Atmel AT91 pinctrl driver");
+MODULE_LICENSE("GPL v2");