3 files changed, 168 insertions, 0 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index d0c41188d4e5..eaa7d3828e70 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -225,6 +225,12 @@ config GPIO_MAX732X_IRQ
           Say yes here to enable the max732x to be used as an interrupt
           controller. It requires the driver to be built in the kernel.
 
+config GPIO_MC9S08DZ60
+        bool "MX35 3DS BOARD MC9S08DZ60 GPIO functions"
+        depends on I2C && MACH_MX35_3DS
+        help
+          Select this to enable the MC9S08DZ60 GPIO driver
+
 config GPIO_PCA953X
         tristate "PCA953x, PCA955x, TCA64xx, and MAX7310 I/O ports"
         depends on I2C
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index fa10df604c01..8863a7f2dece 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_GPIO_MAX7300)	+= gpio-max7300.o
 obj-$(CONFIG_GPIO_MAX7301)      += gpio-max7301.o
 obj-$(CONFIG_GPIO_MAX732X)      += gpio-max732x.o
 obj-$(CONFIG_GPIO_MC33880)      += gpio-mc33880.o
+obj-$(CONFIG_GPIO_MC9S08DZ60)   += gpio-mc9s08dz60.o
 obj-$(CONFIG_GPIO_MCP23S08)     += gpio-mcp23s08.o
 obj-$(CONFIG_GPIO_ML_IOH)       += gpio-ml-ioh.o
 obj-$(CONFIG_GPIO_MPC5200)      += gpio-mpc5200.o
diff --git a/drivers/gpio/gpio-mc9s08dz60.c b/drivers/gpio/gpio-mc9s08dz60.c
new file mode 100644
index 000000000000..2738cc44d636
--- /dev/null
+++ b/drivers/gpio/gpio-mc9s08dz60.c
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2009-2012 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Author: Wu Guoxing <b39297@freescale.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+
+#define GPIO_GROUP_NUM 2
+#define GPIO_NUM_PER_GROUP 8
+#define GPIO_NUM (GPIO_GROUP_NUM*GPIO_NUM_PER_GROUP)
+
+struct mc9s08dz60 {
+        struct i2c_client *client;
+        struct gpio_chip chip;
+};
+
+static inline struct mc9s08dz60 *to_mc9s08dz60(struct gpio_chip *gc)
+{
+        return container_of(gc, struct mc9s08dz60, chip);
+}
+
+
+static void mc9s_gpio_to_reg_and_bit(int offset, u8 *reg, u8 *bit)
+{
+        *reg = 0x20 + offset / GPIO_NUM_PER_GROUP;
+        *bit = offset % GPIO_NUM_PER_GROUP;
+}
+
+static int mc9s08dz60_get_value(struct gpio_chip *gc, unsigned offset)
+{
+        u8 reg, bit;
+        s32 value;
+        struct mc9s08dz60 *mc9s = to_mc9s08dz60(gc);
+
+        mc9s_gpio_to_reg_and_bit(offset, &reg, &bit);
+        value = i2c_smbus_read_byte_data(mc9s->client, reg);
+
+        return (value >= 0) ? (value >> bit) & 0x1 : 0;
+}
+
+static int mc9s08dz60_set(struct mc9s08dz60 *mc9s, unsigned offset, int val)
+{
+        u8 reg, bit;
+        s32 value;
+
+        mc9s_gpio_to_reg_and_bit(offset, &reg, &bit);
+        value = i2c_smbus_read_byte_data(mc9s->client, reg);
+        if (value >= 0) {
+                if (val)
+                        value |= 1 << bit;
+                else
+                        value &= ~(1 << bit);
+
+                return i2c_smbus_write_byte_data(mc9s->client, reg, value);
+        } else
+                return value;
+
+}
+
+
+static void mc9s08dz60_set_value(struct gpio_chip *gc, unsigned offset, int val)
+{
+        struct mc9s08dz60 *mc9s = to_mc9s08dz60(gc);
+
+        mc9s08dz60_set(mc9s, offset, val);
+}
+
+static int mc9s08dz60_direction_output(struct gpio_chip *gc,
+                                       unsigned offset, int val)
+{
+        struct mc9s08dz60 *mc9s = to_mc9s08dz60(gc);
+
+        return mc9s08dz60_set(mc9s, offset, val);
+}
+
+static int mc9s08dz60_probe(struct i2c_client *client,
+                            const struct i2c_device_id *id)
+{
+        int ret = 0;
+        struct mc9s08dz60 *mc9s;
+
+        mc9s = kzalloc(sizeof(*mc9s), GFP_KERNEL);
+        if (!mc9s)
+                return -ENOMEM;
+
+        mc9s->chip.label = client->name;
+        mc9s->chip.base = -1;
+        mc9s->chip.dev = &client->dev;
+        mc9s->chip.owner = THIS_MODULE;
+        mc9s->chip.ngpio = GPIO_NUM;
+        mc9s->chip.can_sleep = 1;
+        mc9s->chip.get = mc9s08dz60_get_value;
+        mc9s->chip.set = mc9s08dz60_set_value;
+        mc9s->chip.direction_output = mc9s08dz60_direction_output;
+        mc9s->client = client;
+        i2c_set_clientdata(client, mc9s);
+
+        ret = gpiochip_add(&mc9s->chip);
+        if (ret)
+                goto error;
+
+        return 0;
+
+ error:
+        kfree(mc9s);
+        return ret;
+}
+
+static int mc9s08dz60_remove(struct i2c_client *client)
+{
+        struct mc9s08dz60 *mc9s;
+        int ret;
+
+        mc9s = i2c_get_clientdata(client);
+
+        ret = gpiochip_remove(&mc9s->chip);
+        if (!ret)
+                kfree(mc9s);
+
+        return ret;
+
+}
+
+static const struct i2c_device_id mc9s08dz60_id[] = {
+        {"mc9s08dz60", 0},
+        {},
+};
+
+MODULE_DEVICE_TABLE(i2c, mc9s08dz60_id);
+
+static struct i2c_driver mc9s08dz60_i2c_driver = {
+        .driver = {
+                .owner = THIS_MODULE,
+                .name = "mc9s08dz60",
+        },
+        .probe = mc9s08dz60_probe,
+        .remove = mc9s08dz60_remove,
+        .id_table = mc9s08dz60_id,
+};
+
+module_i2c_driver(mc9s08dz60_i2c_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc. "
+                "Wu Guoxing <b39297@freescale.com>");
+MODULE_DESCRIPTION("mc9s08dz60 gpio function on mx35 3ds board");
+MODULE_LICENSE("GPL v2");