1 files changed, 112 insertions, 0 deletions

diff --git a/arch/arm/mach-msm/board-trout-gpio.c b/arch/arm/mach-msm/board-trout-gpio.c
new file mode 100644
index 00000000000..523d213bf79
--- /dev/null
+++ b/arch/arm/mach-msm/board-trout-gpio.c
@@ -0,0 +1,112 @@
+/*
+ * linux/arch/arm/mach-msm/gpio.c
+ *
+ * Copyright (C) 2005 HP Labs
+ * Copyright (C) 2008 Google, Inc.
+ * Copyright (C) 2009 Pavel Machek <pavel@ucw.cz>
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+
+#include "board-trout.h"
+
+struct msm_gpio_chip {
+        struct gpio_chip        chip;
+        void __iomem            *reg;   /* Base of register bank */
+        u8                      shadow;
+};
+
+#define to_msm_gpio_chip(c) container_of(c, struct msm_gpio_chip, chip)
+
+static int msm_gpiolib_get(struct gpio_chip *chip, unsigned offset)
+{
+        struct msm_gpio_chip *msm_gpio = to_msm_gpio_chip(chip);
+        unsigned mask = 1 << offset;
+
+        return !!(readb(msm_gpio->reg) & mask);
+}
+
+static void msm_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val)
+{
+        struct msm_gpio_chip *msm_gpio = to_msm_gpio_chip(chip);
+        unsigned mask = 1 << offset;
+
+        if (val)
+                msm_gpio->shadow |= mask;
+        else
+                msm_gpio->shadow &= ~mask;
+
+        writeb(msm_gpio->shadow, msm_gpio->reg);
+}
+
+static int msm_gpiolib_direction_input(struct gpio_chip *chip,
+                                        unsigned offset)
+{
+        msm_gpiolib_set(chip, offset, 0);
+        return 0;
+}
+
+static int msm_gpiolib_direction_output(struct gpio_chip *chip,
+                                         unsigned offset, int val)
+{
+        msm_gpiolib_set(chip, offset, val);
+        return 0;
+}
+
+#define TROUT_GPIO_BANK(name, reg_num, base_gpio, shadow_val)           \
+        {                                                               \
+                .chip = {                                               \
+                        .label            = name,                       \
+                        .direction_input  = msm_gpiolib_direction_input,\
+                        .direction_output = msm_gpiolib_direction_output, \
+                        .get              = msm_gpiolib_get,            \
+                        .set              = msm_gpiolib_set,            \
+                        .base             = base_gpio,                  \
+                        .ngpio            = 8,                          \
+                },                                                      \
+                .reg = (void *) reg_num + TROUT_CPLD_BASE,              \
+                .shadow = shadow_val,                                   \
+        }
+
+static struct msm_gpio_chip msm_gpio_banks[] = {
+#if defined(CONFIG_MSM_DEBUG_UART1)
+        /* H2W pins <-> UART1 */
+        TROUT_GPIO_BANK("MISC2", 0x00,   TROUT_GPIO_MISC2_BASE, 0x40),
+#else
+        /* H2W pins <-> UART3, Bluetooth <-> UART1 */
+        TROUT_GPIO_BANK("MISC2", 0x00,   TROUT_GPIO_MISC2_BASE, 0x80),
+#endif
+        /* I2C pull */
+        TROUT_GPIO_BANK("MISC3", 0x02,   TROUT_GPIO_MISC3_BASE, 0x04),
+        TROUT_GPIO_BANK("MISC4", 0x04,   TROUT_GPIO_MISC4_BASE, 0),
+        /* mmdi 32k en */
+        TROUT_GPIO_BANK("MISC5", 0x06,   TROUT_GPIO_MISC5_BASE, 0x04),
+        TROUT_GPIO_BANK("INT2", 0x08,    TROUT_GPIO_INT2_BASE,  0),
+        TROUT_GPIO_BANK("MISC1", 0x0a,   TROUT_GPIO_MISC1_BASE, 0),
+        TROUT_GPIO_BANK("VIRTUAL", 0x12, TROUT_GPIO_VIRTUAL_BASE, 0),
+};
+
+/*
+ * Called from the processor-specific init to enable GPIO pin support.
+ */
+int __init trout_init_gpio(void)
+{
+        int i;
+
+        for (i = 0; i < ARRAY_SIZE(msm_gpio_banks); i++)
+                gpiochip_add(&msm_gpio_banks[i].chip);
+
+        return 0;
+}
+
+postcore_initcall(trout_init_gpio);
+