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raumfeld.c

/*
 * arch/arm/mach-pxa/raumfeld.c
 *
 * Support for the following Raumfeld devices:
 *
 *    * Controller
 *    * Connector
 *    * Speaker S/M
 *
 * See http://www.raumfeld.com for details.
 *
 * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
 *
 * 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/kernel.h>
#include <linux/sysdev.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/gpio.h>
#include <linux/smsc911x.h>
#include <linux/input.h>
#include <linux/rotary_encoder.h>
#include <linux/gpio_keys.h>
#include <linux/input/eeti_ts.h>
#include <linux/leds.h>
#include <linux/w1-gpio.h>
#include <linux/sched.h>
#include <linux/pwm_backlight.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/spi/spi_gpio.h>
#include <linux/lis3lv02d.h>
#include <linux/pda_power.h>
#include <linux/power_supply.h>
#include <linux/regulator/max8660.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/fixed.h>
#include <linux/regulator/consumer.h>
#include <linux/delay.h>

#include <asm/mach-types.h>
#include <asm/mach/arch.h>

#include <mach/hardware.h>
#include <mach/pxa3xx-regs.h>
#include <mach/mfp-pxa3xx.h>
#include <mach/mfp-pxa300.h>
#include <mach/ohci.h>
#include <mach/pxafb.h>
#include <mach/mmc.h>
#include <plat/i2c.h>
#include <plat/pxa3xx_nand.h>

#include "generic.h"
#include "devices.h"
#include "clock.h"

/* common GPIO    definitions */

/* inputs */
#define GPIO_ON_OFF           (14)
#define GPIO_VOLENC_A         (19)
#define GPIO_VOLENC_B         (20)
#define GPIO_CHARGE_DONE      (23)
#define GPIO_CHARGE_IND       (27)
#define GPIO_TOUCH_IRQ        (32)
#define GPIO_ETH_IRQ          (40)
#define GPIO_SPI_MISO         (98)
#define GPIO_ACCEL_IRQ        (104)
#define GPIO_RESCUE_BOOT      (115)
#define GPIO_DOCK_DETECT      (116)
#define GPIO_KEY1       (117)
#define GPIO_KEY2       (118)
#define GPIO_KEY3       (119)
#define GPIO_CHARGE_USB_OK    (112)
#define GPIO_CHARGE_DC_OK     (101)
#define GPIO_CHARGE_USB_SUSP  (102)

/* outputs */
#define GPIO_SHUTDOWN_SUPPLY  (16)
#define GPIO_SHUTDOWN_BATT    (18)
#define GPIO_CHRG_PEN2        (31)
#define GPIO_TFT_VA_EN        (33)
#define GPIO_SPDIF_CS         (34)
#define GPIO_LED2       (35)
#define GPIO_LED1       (36)
#define GPIO_SPDIF_RESET      (38)
#define GPIO_SPI_CLK          (95)
#define GPIO_MCLK_DAC_CS      (96)
#define GPIO_SPI_MOSI         (97)
#define GPIO_W1_PULLUP_ENABLE (105)
#define GPIO_DISPLAY_ENABLE   (106)
#define GPIO_MCLK_RESET       (111)
#define GPIO_W2W_RESET        (113)
#define GPIO_W2W_PDN          (114)
#define GPIO_CODEC_RESET      (120)
#define GPIO_AUDIO_VA_ENABLE  (124)
#define GPIO_ACCEL_CS         (125)
#define GPIO_ONE_WIRE         (126)

/*
 * GPIO configurations
 */
static mfp_cfg_t raumfeld_controller_pin_config[] __initdata = {
      /* UART1 */
      GPIO77_UART1_RXD,
      GPIO78_UART1_TXD,
      GPIO79_UART1_CTS,
      GPIO81_UART1_DSR,
      GPIO83_UART1_DTR,
      GPIO84_UART1_RTS,

      /* UART3 */
      GPIO110_UART3_RXD,

      /* USB Host */
      GPIO0_2_USBH_PEN,
      GPIO1_2_USBH_PWR,

      /* I2C */
      GPIO21_I2C_SCL | MFP_LPM_FLOAT | MFP_PULL_FLOAT,
      GPIO22_I2C_SDA | MFP_LPM_FLOAT | MFP_PULL_FLOAT,

      /* SPI */
      GPIO34_GPIO,      /* SPDIF_CS */
      GPIO96_GPIO,      /* MCLK_CS */
      GPIO125_GPIO,     /* ACCEL_CS */

      /* MMC */
      GPIO3_MMC1_DAT0,
      GPIO4_MMC1_DAT1,
      GPIO5_MMC1_DAT2,
      GPIO6_MMC1_DAT3,
      GPIO7_MMC1_CLK,
      GPIO8_MMC1_CMD,

      /* One-wire */
      GPIO126_GPIO | MFP_LPM_FLOAT,
      GPIO105_GPIO | MFP_PULL_LOW | MFP_LPM_PULL_LOW,

      /* CHRG_USB_OK */
      GPIO101_GPIO | MFP_PULL_HIGH,
      /* CHRG_USB_OK */
      GPIO112_GPIO | MFP_PULL_HIGH,
      /* CHRG_USB_SUSP */
      GPIO102_GPIO,
      /* DISPLAY_ENABLE */
      GPIO106_GPIO,
      /* DOCK_DETECT */
      GPIO116_GPIO | MFP_LPM_FLOAT | MFP_PULL_FLOAT,

      /* LCD */
      GPIO54_LCD_LDD_0,
      GPIO55_LCD_LDD_1,
      GPIO56_LCD_LDD_2,
      GPIO57_LCD_LDD_3,
      GPIO58_LCD_LDD_4,
      GPIO59_LCD_LDD_5,
      GPIO60_LCD_LDD_6,
      GPIO61_LCD_LDD_7,
      GPIO62_LCD_LDD_8,
      GPIO63_LCD_LDD_9,
      GPIO64_LCD_LDD_10,
      GPIO65_LCD_LDD_11,
      GPIO66_LCD_LDD_12,
      GPIO67_LCD_LDD_13,
      GPIO68_LCD_LDD_14,
      GPIO69_LCD_LDD_15,
      GPIO70_LCD_LDD_16,
      GPIO71_LCD_LDD_17,
      GPIO72_LCD_FCLK,
      GPIO73_LCD_LCLK,
      GPIO74_LCD_PCLK,
      GPIO75_LCD_BIAS,
};

static mfp_cfg_t raumfeld_connector_pin_config[] __initdata = {
      /* UART1 */
      GPIO77_UART1_RXD,
      GPIO78_UART1_TXD,
      GPIO79_UART1_CTS,
      GPIO81_UART1_DSR,
      GPIO83_UART1_DTR,
      GPIO84_UART1_RTS,

      /* UART3 */
      GPIO110_UART3_RXD,

      /* USB Host */
      GPIO0_2_USBH_PEN,
      GPIO1_2_USBH_PWR,

      /* I2C */
      GPIO21_I2C_SCL | MFP_LPM_FLOAT | MFP_PULL_FLOAT,
      GPIO22_I2C_SDA | MFP_LPM_FLOAT | MFP_PULL_FLOAT,

      /* SPI */
      GPIO34_GPIO,      /* SPDIF_CS */
      GPIO96_GPIO,      /* MCLK_CS */
      GPIO125_GPIO,     /* ACCEL_CS */

      /* MMC */
      GPIO3_MMC1_DAT0,
      GPIO4_MMC1_DAT1,
      GPIO5_MMC1_DAT2,
      GPIO6_MMC1_DAT3,
      GPIO7_MMC1_CLK,
      GPIO8_MMC1_CMD,

      /* Ethernet */
      GPIO1_nCS2,             /* CS */
      GPIO40_GPIO | MFP_PULL_HIGH,  /* IRQ */

      /* SSP for I2S */
      GPIO85_SSP1_SCLK,
      GPIO89_SSP1_EXTCLK,
      GPIO86_SSP1_FRM,
      GPIO87_SSP1_TXD,
      GPIO88_SSP1_RXD,
      GPIO90_SSP1_SYSCLK,

      /* SSP2 for S/PDIF */
      GPIO25_SSP2_SCLK,
      GPIO26_SSP2_FRM,
      GPIO27_SSP2_TXD,
      GPIO29_SSP2_EXTCLK,

      /* LEDs */
      GPIO35_GPIO | MFP_LPM_PULL_LOW,
      GPIO36_GPIO | MFP_LPM_DRIVE_HIGH,
};

static mfp_cfg_t raumfeld_speaker_pin_config[] __initdata = {
      /* UART1 */
      GPIO77_UART1_RXD,
      GPIO78_UART1_TXD,
      GPIO79_UART1_CTS,
      GPIO81_UART1_DSR,
      GPIO83_UART1_DTR,
      GPIO84_UART1_RTS,

      /* UART3 */
      GPIO110_UART3_RXD,

      /* USB Host */
      GPIO0_2_USBH_PEN,
      GPIO1_2_USBH_PWR,

      /* I2C */
      GPIO21_I2C_SCL | MFP_LPM_FLOAT | MFP_PULL_FLOAT,
      GPIO22_I2C_SDA | MFP_LPM_FLOAT | MFP_PULL_FLOAT,

      /* SPI */
      GPIO34_GPIO,      /* SPDIF_CS */
      GPIO96_GPIO,      /* MCLK_CS */
      GPIO125_GPIO,     /* ACCEL_CS */

      /* MMC */
      GPIO3_MMC1_DAT0,
      GPIO4_MMC1_DAT1,
      GPIO5_MMC1_DAT2,
      GPIO6_MMC1_DAT3,
      GPIO7_MMC1_CLK,
      GPIO8_MMC1_CMD,

      /* Ethernet */
      GPIO1_nCS2,             /* CS */
      GPIO40_GPIO | MFP_PULL_HIGH,  /* IRQ */

      /* SSP for I2S */
      GPIO85_SSP1_SCLK,
      GPIO89_SSP1_EXTCLK,
      GPIO86_SSP1_FRM,
      GPIO87_SSP1_TXD,
      GPIO88_SSP1_RXD,
      GPIO90_SSP1_SYSCLK,

      /* LEDs */
      GPIO35_GPIO | MFP_LPM_PULL_LOW,
      GPIO36_GPIO | MFP_LPM_DRIVE_HIGH,
};

/*
 * SMSC LAN9220 Ethernet
 */

static struct resource smc91x_resources[] = {
      {
            .start      = PXA3xx_CS2_PHYS,
            .end  = PXA3xx_CS2_PHYS + 0xfffff,
            .flags      = IORESOURCE_MEM,
      },
      {
            .start      = gpio_to_irq(GPIO_ETH_IRQ),
            .end  = gpio_to_irq(GPIO_ETH_IRQ),
            .flags      = IORESOURCE_IRQ | IRQF_TRIGGER_FALLING,
      }
};

static struct smsc911x_platform_config raumfeld_smsc911x_config = {
      .phy_interface    = PHY_INTERFACE_MODE_MII,
      .irq_polarity     = SMSC911X_IRQ_POLARITY_ACTIVE_LOW,
      .irq_type   = SMSC911X_IRQ_TYPE_OPEN_DRAIN,
      .flags            = SMSC911X_USE_32BIT | SMSC911X_SAVE_MAC_ADDRESS,
};

static struct platform_device smc91x_device = {
      .name       = "smsc911x",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(smc91x_resources),
      .resource   = smc91x_resources,
      .dev        = {
            .platform_data = &raumfeld_smsc911x_config,
      }
};

/**
 * NAND
 */

static struct mtd_partition raumfeld_nand_partitions[] = {
      {
            .name       = "Bootloader",
            .offset           = 0,
            .size       = 0xa0000,
            .mask_flags = MTD_WRITEABLE, /* force read-only */
      },
      {
            .name       = "BootloaderEnvironment",
            .offset           = 0xa0000,
            .size       = 0x20000,
      },
      {
            .name       = "BootloaderSplashScreen",
            .offset           = 0xc0000,
            .size       = 0x60000,
      },
      {
            .name       = "UBI",
            .offset           = 0x120000,
            .size       = MTDPART_SIZ_FULL,
      },
};

static struct pxa3xx_nand_platform_data raumfeld_nand_info = {
      .enable_arbiter   = 1,
      .keep_config      = 1,
      .parts            = raumfeld_nand_partitions,
      .nr_parts   = ARRAY_SIZE(raumfeld_nand_partitions),
};

/**
 * USB (OHCI) support
 */

static struct pxaohci_platform_data raumfeld_ohci_info = {
      .port_mode      = PMM_GLOBAL_MODE,
      .flags            = ENABLE_PORT1,
};

/**
 * Rotary encoder input device
 */

static struct rotary_encoder_platform_data raumfeld_rotary_encoder_info = {
      .steps            = 24,
      .axis       = REL_X,
      .relative_axis    = 1,
      .gpio_a           = GPIO_VOLENC_A,
      .gpio_b           = GPIO_VOLENC_B,
      .inverted_a = 1,
      .inverted_b = 0,
};

static struct platform_device rotary_encoder_device = {
      .name       = "rotary-encoder",
      .id         = 0,
      .dev        = {
            .platform_data = &raumfeld_rotary_encoder_info,
      }
};

/**
 * GPIO buttons
 */

static struct gpio_keys_button gpio_keys_button[] = {
      {
            .code             = KEY_F1,
            .type             = EV_KEY,
            .gpio             = GPIO_KEY1,
            .active_low       = 1,
            .wakeup                 = 0,
            .debounce_interval      = 5, /* ms */
            .desc             = "Button 1",
      },
      {
            .code             = KEY_F2,
            .type             = EV_KEY,
            .gpio             = GPIO_KEY2,
            .active_low       = 1,
            .wakeup                 = 0,
            .debounce_interval      = 5, /* ms */
            .desc             = "Button 2",
      },
      {
            .code             = KEY_F3,
            .type             = EV_KEY,
            .gpio             = GPIO_KEY3,
            .active_low       = 1,
            .wakeup                 = 0,
            .debounce_interval      = 5, /* ms */
            .desc             = "Button 3",
      },
      {
            .code             = KEY_F4,
            .type             = EV_KEY,
            .gpio             = GPIO_RESCUE_BOOT,
            .active_low       = 0,
            .wakeup                 = 0,
            .debounce_interval      = 5, /* ms */
            .desc             = "rescue boot button",
      },
      {
            .code             = KEY_F5,
            .type             = EV_KEY,
            .gpio             = GPIO_DOCK_DETECT,
            .active_low       = 1,
            .wakeup                 = 0,
            .debounce_interval      = 5, /* ms */
            .desc             = "dock detect",
      },
      {
            .code             = KEY_F6,
            .type             = EV_KEY,
            .gpio             = GPIO_ON_OFF,
            .active_low       = 0,
            .wakeup                 = 0,
            .debounce_interval      = 5, /* ms */
            .desc             = "on_off button",
      },
};

static struct gpio_keys_platform_data gpio_keys_platform_data = {
      .buttons    = gpio_keys_button,
      .nbuttons   = ARRAY_SIZE(gpio_keys_button),
      .rep        = 0,
};

static struct platform_device raumfeld_gpio_keys_device = {
      .name = "gpio-keys",
      .id   = -1,
      .dev  = {
            .platform_data    = &gpio_keys_platform_data,
      }
};

/**
 * GPIO LEDs
 */

static struct gpio_led raumfeld_leds[] = {
      {
            .name       = "raumfeld:1",
            .gpio       = GPIO_LED1,
            .active_low = 1,
            .default_state    = LEDS_GPIO_DEFSTATE_ON,
      },
      {
            .name       = "raumfeld:2",
            .gpio       = GPIO_LED2,
            .active_low = 0,
            .default_state    = LEDS_GPIO_DEFSTATE_OFF,
      }
};

static struct gpio_led_platform_data raumfeld_led_platform_data = {
      .leds       = raumfeld_leds,
      .num_leds   = ARRAY_SIZE(raumfeld_leds),
};

static struct platform_device raumfeld_led_device = {
      .name = "leds-gpio",
      .id   = -1,
      .dev  = {
            .platform_data = &raumfeld_led_platform_data,
      },
};

/**
 * One-wire (W1 bus) support
 */

static void w1_enable_external_pullup(int enable)
{
      gpio_set_value(GPIO_W1_PULLUP_ENABLE, enable);
      msleep(100);
}

static struct w1_gpio_platform_data w1_gpio_platform_data = {
      .pin              = GPIO_ONE_WIRE,
      .is_open_drain          = 0,
      .enable_external_pullup = w1_enable_external_pullup,
};

struct platform_device raumfeld_w1_gpio_device = {
      .name = "w1-gpio",
      .dev  = {
            .platform_data = &w1_gpio_platform_data
      }
};

static void __init raumfeld_w1_init(void)
{
      int ret = gpio_request(GPIO_W1_PULLUP_ENABLE,
                        "W1 external pullup enable");

      if (ret < 0)
            pr_warning("Unable to request GPIO_W1_PULLUP_ENABLE\n");
      else
            gpio_direction_output(GPIO_W1_PULLUP_ENABLE, 0);

      platform_device_register(&raumfeld_w1_gpio_device);
}

/**
 * Framebuffer device
 */

/* PWM controlled backlight */
static struct platform_pwm_backlight_data raumfeld_pwm_backlight_data = {
      .pwm_id           = 0,
      .max_brightness   = 100,
      .dft_brightness   = 100,
      /* 10000 ns = 10 ms ^= 100 kHz */
      .pwm_period_ns    = 10000,
};

static struct platform_device raumfeld_pwm_backlight_device = {
      .name = "pwm-backlight",
      .dev  = {
            .parent           = &pxa27x_device_pwm0.dev,
            .platform_data    = &raumfeld_pwm_backlight_data,
      }
};

/* LT3593 controlled backlight */
static struct gpio_led raumfeld_lt3593_led = {
      .name       = "backlight",
      .gpio       = mfp_to_gpio(MFP_PIN_GPIO17),
      .default_state    = LEDS_GPIO_DEFSTATE_ON,
};

static struct gpio_led_platform_data raumfeld_lt3593_platform_data = {
      .leds       = &raumfeld_lt3593_led,
      .num_leds   = 1,
};

static struct platform_device raumfeld_lt3593_device = {
      .name = "leds-lt3593",
      .id   = -1,
      .dev  = {
            .platform_data = &raumfeld_lt3593_platform_data,
      },
};

static struct pxafb_mode_info sharp_lq043t3dx02_mode = {
      .pixclock   = 111000,
      .xres       = 480,
      .yres       = 272,
      .bpp        = 16,
      .hsync_len  = 4,
      .left_margin      = 2,
      .right_margin     = 1,
      .vsync_len  = 1,
      .upper_margin     = 3,
      .lower_margin     = 1,
      .sync       = 0,
};

static struct pxafb_mach_info raumfeld_sharp_lcd_info = {
      .modes            = &sharp_lq043t3dx02_mode,
      .num_modes  = 1,
      .video_mem_size = 0x400000,
      .lcd_conn   = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
#ifdef CONFIG_PXA3XX_GCU
      .acceleration_enabled = 1,
#endif
};

static void __init raumfeld_lcd_init(void)
{
      int ret;

      set_pxa_fb_info(&raumfeld_sharp_lcd_info);

      /* Earlier devices had the backlight regulator controlled
       * via PWM, later versions use another controller for that */
      if ((system_rev & 0xff) < 2) {
            mfp_cfg_t raumfeld_pwm_pin_config = GPIO17_PWM0_OUT;
            pxa3xx_mfp_config(&raumfeld_pwm_pin_config, 1);
            platform_device_register(&raumfeld_pwm_backlight_device);
      } else
            platform_device_register(&raumfeld_lt3593_device);

      ret = gpio_request(GPIO_TFT_VA_EN, "display VA enable");
      if (ret < 0)
            pr_warning("Unable to request GPIO_TFT_VA_EN\n");
      else
            gpio_direction_output(GPIO_TFT_VA_EN, 1);

      ret = gpio_request(GPIO_DISPLAY_ENABLE, "display enable");
      if (ret < 0)
            pr_warning("Unable to request GPIO_DISPLAY_ENABLE\n");
      else
            gpio_direction_output(GPIO_DISPLAY_ENABLE, 1);

      platform_device_register(&pxa3xx_device_gcu);
}

/**
 * SPI devices
 */

struct spi_gpio_platform_data raumfeld_spi_platform_data = {
      .sck        = GPIO_SPI_CLK,
      .mosi       = GPIO_SPI_MOSI,
      .miso       = GPIO_SPI_MISO,
      .num_chipselect   = 3,
};

static struct platform_device raumfeld_spi_device = {
      .name = "spi_gpio",
      .id   = 0,
      .dev  = {
            .platform_data    = &raumfeld_spi_platform_data,
      }
};

static struct lis3lv02d_platform_data lis3_pdata = {
      .click_flags      = LIS3_CLICK_SINGLE_X |
                    LIS3_CLICK_SINGLE_Y |
                    LIS3_CLICK_SINGLE_Z,
      .irq_cfg    = LIS3_IRQ1_CLICK | LIS3_IRQ2_CLICK,
      .wakeup_flags     = LIS3_WAKEUP_X_LO | LIS3_WAKEUP_X_HI |
                    LIS3_WAKEUP_Y_LO | LIS3_WAKEUP_Y_HI |
                    LIS3_WAKEUP_Z_LO | LIS3_WAKEUP_Z_HI,
      .wakeup_thresh    = 10,
      .click_thresh_x = 10,
      .click_thresh_y = 10,
      .click_thresh_z = 10,
};

#define SPI_AK4104      \
{                 \
      .modalias   = "ak4104", \
      .max_speed_hz     = 10000,    \
      .bus_num    = 0,        \
      .chip_select      = 0,        \
      .controller_data = (void *) GPIO_SPDIF_CS,      \
}

#define SPI_LIS3  \
{                 \
      .modalias   = "lis3lv02d_spi",      \
      .max_speed_hz     = 1000000,        \
      .bus_num    = 0,              \
      .chip_select      = 1,              \
      .controller_data = (void *) GPIO_ACCEL_CS,      \
      .platform_data    = &lis3_pdata,          \
      .irq        = gpio_to_irq(GPIO_ACCEL_IRQ),      \
}

#define SPI_DAC7512     \
{     \
      .modalias   = "dac7512",            \
      .max_speed_hz     = 1000000,        \
      .bus_num    = 0,              \
      .chip_select      = 2,              \
      .controller_data = (void *) GPIO_MCLK_DAC_CS,   \
}

static struct spi_board_info connector_spi_devices[] __initdata = {
      SPI_AK4104,
      SPI_DAC7512,
};

static struct spi_board_info speaker_spi_devices[] __initdata = {
      SPI_DAC7512,
};

static struct spi_board_info controller_spi_devices[] __initdata = {
      SPI_LIS3,
};

/**
 * MMC for Marvell Libertas 8688 via SDIO
 */

static int raumfeld_mci_init(struct device *dev, irq_handler_t isr, void *data)
{
      gpio_set_value(GPIO_W2W_RESET, 1);
      gpio_set_value(GPIO_W2W_PDN, 1);

      return 0;
}

static void raumfeld_mci_exit(struct device *dev, void *data)
{
      gpio_set_value(GPIO_W2W_RESET, 0);
      gpio_set_value(GPIO_W2W_PDN, 0);
}

static struct pxamci_platform_data raumfeld_mci_platform_data = {
      .init             = raumfeld_mci_init,
      .exit             = raumfeld_mci_exit,
      .detect_delay_ms  = 200,
      .gpio_card_detect = -1,
      .gpio_card_ro           = -1,
      .gpio_power       = -1,
};

/*
 * External power / charge logic
 */

static int power_supply_init(struct device *dev)
{
      return 0;
}

static void power_supply_exit(struct device *dev)
{
}

static int raumfeld_is_ac_online(void)
{
      return !gpio_get_value(GPIO_CHARGE_DC_OK);
}

static int raumfeld_is_usb_online(void)
{
      return 0;
}

static char *raumfeld_power_supplicants[] = { "ds2760-battery.0" };

static void raumfeld_power_signal_charged(void)
{
      struct power_supply *psy =
            power_supply_get_by_name(raumfeld_power_supplicants[0]);

      if (psy)
            power_supply_set_battery_charged(psy);
}

static int raumfeld_power_resume(void)
{
      /* check if GPIO_CHARGE_DONE went low while we were sleeping */
      if (!gpio_get_value(GPIO_CHARGE_DONE))
            raumfeld_power_signal_charged();

      return 0;
}

static struct pda_power_pdata power_supply_info = {
      .init             = power_supply_init,
      .is_ac_online           = raumfeld_is_ac_online,
      .is_usb_online          = raumfeld_is_usb_online,
      .exit             = power_supply_exit,
      .supplied_to            = raumfeld_power_supplicants,
      .num_supplicants  = ARRAY_SIZE(raumfeld_power_supplicants),
      .resume                 = raumfeld_power_resume,
};

static struct resource power_supply_resources[] = {
      {
            .name  = "ac",
            .flags = IORESOURCE_IRQ |
                   IORESOURCE_IRQ_HIGHEDGE | IORESOURCE_IRQ_LOWEDGE,
            .start = GPIO_CHARGE_DC_OK,
            .end   = GPIO_CHARGE_DC_OK,
      },
};

static irqreturn_t charge_done_irq(int irq, void *dev_id)
{
      raumfeld_power_signal_charged();
      return IRQ_HANDLED;
}

static struct platform_device raumfeld_power_supply = {
      .name = "pda-power",
      .id   = -1,
      .dev  = {
            .platform_data = &power_supply_info,
      },
      .resource      = power_supply_resources,
      .num_resources = ARRAY_SIZE(power_supply_resources),
};

static void __init raumfeld_power_init(void)
{
      int ret;

      /* Set PEN2 high to enable maximum charge current */
      ret = gpio_request(GPIO_CHRG_PEN2, "CHRG_PEN2");
      if (ret < 0)
            pr_warning("Unable to request GPIO_CHRG_PEN2\n");
      else
            gpio_direction_output(GPIO_CHRG_PEN2, 1);

      ret = gpio_request(GPIO_CHARGE_DC_OK, "CABLE_DC_OK");
      if (ret < 0)
            pr_warning("Unable to request GPIO_CHARGE_DC_OK\n");

      ret = gpio_request(GPIO_CHARGE_USB_SUSP, "CHARGE_USB_SUSP");
      if (ret < 0)
            pr_warning("Unable to request GPIO_CHARGE_USB_SUSP\n");
      else
            gpio_direction_output(GPIO_CHARGE_USB_SUSP, 0);

      power_supply_resources[0].start = gpio_to_irq(GPIO_CHARGE_DC_OK);
      power_supply_resources[0].end = gpio_to_irq(GPIO_CHARGE_DC_OK);

      ret = request_irq(gpio_to_irq(GPIO_CHARGE_DONE),
                  &charge_done_irq, IORESOURCE_IRQ_LOWEDGE,
                  "charge_done", NULL);

      if (ret < 0)
            printk(KERN_ERR "%s: unable to register irq %d\n", __func__,
                  GPIO_CHARGE_DONE);
      else
            platform_device_register(&raumfeld_power_supply);
}

/* Fixed regulator for AUDIO_VA, 0-0048 maps to the cs4270 codec device */

static struct regulator_consumer_supply audio_va_consumer_supply =
      REGULATOR_SUPPLY("va", "0-0048");

struct regulator_init_data audio_va_initdata = {
      .consumer_supplies = &audio_va_consumer_supply,
      .num_consumer_supplies = 1,
      .constraints = {
            .valid_ops_mask = REGULATOR_CHANGE_STATUS,
      },
};

static struct fixed_voltage_config audio_va_config = {
      .supply_name            = "audio_va",
      .microvolts       = 5000000,
      .gpio             = GPIO_AUDIO_VA_ENABLE,
      .enable_high            = 1,
      .enabled_at_boot  = 0,
      .init_data        = &audio_va_initdata,
};

static struct platform_device audio_va_device = {
      .name = "reg-fixed-voltage",
      .id   = 0,
      .dev  = {
            .platform_data = &audio_va_config,
      },
};

/* Dummy supplies for Codec's VD/VLC */

static struct regulator_consumer_supply audio_dummy_supplies[] = {
      REGULATOR_SUPPLY("vd", "0-0048"),
      REGULATOR_SUPPLY("vlc", "0-0048"),
};

struct regulator_init_data audio_dummy_initdata = {
      .consumer_supplies = audio_dummy_supplies,
      .num_consumer_supplies = ARRAY_SIZE(audio_dummy_supplies),
      .constraints = {
            .valid_ops_mask = REGULATOR_CHANGE_STATUS,
      },
};

static struct fixed_voltage_config audio_dummy_config = {
      .supply_name            = "audio_vd",
      .microvolts       = 3300000,
      .gpio             = -1,
      .init_data        = &audio_dummy_initdata,
};

static struct platform_device audio_supply_dummy_device = {
      .name = "reg-fixed-voltage",
      .id   = 1,
      .dev  = {
            .platform_data = &audio_dummy_config,
      },
};

static struct platform_device *audio_regulator_devices[] = {
      &audio_va_device,
      &audio_supply_dummy_device,
};

/**
 * Regulator support via MAX8660
 */

static struct regulator_consumer_supply vcc_mmc_supply =
      REGULATOR_SUPPLY("vmmc", "pxa2xx-mci.0");

static struct regulator_init_data vcc_mmc_init_data = {
      .constraints = {
            .min_uV                 = 3300000,
            .max_uV                 = 3300000,
            .valid_modes_mask = REGULATOR_MODE_NORMAL,
            .valid_ops_mask         = REGULATOR_CHANGE_STATUS |
                                REGULATOR_CHANGE_VOLTAGE |
                                REGULATOR_CHANGE_MODE,
      },
      .consumer_supplies = &vcc_mmc_supply,
      .num_consumer_supplies = 1,
};

struct max8660_subdev_data max8660_v6_subdev_data = {
      .id         = MAX8660_V6,
      .name       = "vmmc",
      .platform_data    = &vcc_mmc_init_data,
};

static struct max8660_platform_data max8660_pdata = {
      .subdevs = &max8660_v6_subdev_data,
      .num_subdevs = 1,
};

/**
 * I2C devices
 */

static struct i2c_board_info raumfeld_pwri2c_board_info = {
      .type       = "max8660",
      .addr       = 0x34,
      .platform_data    = &max8660_pdata,
};

static struct i2c_board_info raumfeld_connector_i2c_board_info __initdata = {
      .type = "cs4270",
      .addr = 0x48,
};

static struct eeti_ts_platform_data eeti_ts_pdata = {
      .irq_active_high = 1,
};

static struct i2c_board_info raumfeld_controller_i2c_board_info __initdata = {
      .type = "eeti_ts",
      .addr = 0x0a,
      .irq  = gpio_to_irq(GPIO_TOUCH_IRQ),
      .platform_data = &eeti_ts_pdata,
};

static struct platform_device *raumfeld_common_devices[] = {
      &raumfeld_gpio_keys_device,
      &raumfeld_led_device,
      &raumfeld_spi_device,
};

static void __init raumfeld_audio_init(void)
{
      int ret;

      ret = gpio_request(GPIO_CODEC_RESET, "cs4270 reset");
      if (ret < 0)
            pr_warning("unable to request GPIO_CODEC_RESET\n");
      else
            gpio_direction_output(GPIO_CODEC_RESET, 1);

      ret = gpio_request(GPIO_SPDIF_RESET, "ak4104 s/pdif reset");
      if (ret < 0)
            pr_warning("unable to request GPIO_SPDIF_RESET\n");
      else
            gpio_direction_output(GPIO_SPDIF_RESET, 1);

      ret = gpio_request(GPIO_MCLK_RESET, "MCLK reset");
      if (ret < 0)
            pr_warning("unable to request GPIO_MCLK_RESET\n");
      else
            gpio_direction_output(GPIO_MCLK_RESET, 1);

      platform_add_devices(ARRAY_AND_SIZE(audio_regulator_devices));
}

static void __init raumfeld_common_init(void)
{
      int ret;

      /* The on/off button polarity has changed after revision 1 */
      if ((system_rev & 0xff) > 1) {
            int i;

            for (i = 0; i < ARRAY_SIZE(gpio_keys_button); i++)
                  if (!strcmp(gpio_keys_button[i].desc, "on_off button"))
                        gpio_keys_button[i].active_low = 1;
      }

      enable_irq_wake(IRQ_WAKEUP0);

      pxa3xx_set_nand_info(&raumfeld_nand_info);
      pxa3xx_set_i2c_power_info(NULL);
      pxa_set_ohci_info(&raumfeld_ohci_info);
      pxa_set_mci_info(&raumfeld_mci_platform_data);
      pxa_set_i2c_info(NULL);
      pxa_set_ffuart_info(NULL);

      ret = gpio_request(GPIO_W2W_RESET, "Wi2Wi reset");
      if (ret < 0)
            pr_warning("Unable to request GPIO_W2W_RESET\n");
      else
            gpio_direction_output(GPIO_W2W_RESET, 0);

      ret = gpio_request(GPIO_W2W_PDN, "Wi2Wi powerup");
      if (ret < 0)
            pr_warning("Unable to request GPIO_W2W_PDN\n");
      else
            gpio_direction_output(GPIO_W2W_PDN, 0);

      /* this can be used to switch off the device */
      ret = gpio_request(GPIO_SHUTDOWN_SUPPLY, "supply shutdown");
      if (ret < 0)
            pr_warning("Unable to request GPIO_SHUTDOWN_SUPPLY\n");
      else
            gpio_direction_output(GPIO_SHUTDOWN_SUPPLY, 0);

      platform_add_devices(ARRAY_AND_SIZE(raumfeld_common_devices));
      i2c_register_board_info(1, &raumfeld_pwri2c_board_info, 1);
}

static void __init raumfeld_controller_init(void)
{
      int ret;

      pxa3xx_mfp_config(ARRAY_AND_SIZE(raumfeld_controller_pin_config));
      platform_device_register(&rotary_encoder_device);
      spi_register_board_info(ARRAY_AND_SIZE(controller_spi_devices));
      i2c_register_board_info(0, &raumfeld_controller_i2c_board_info, 1);

      ret = gpio_request(GPIO_SHUTDOWN_BATT, "battery shutdown");
      if (ret < 0)
            pr_warning("Unable to request GPIO_SHUTDOWN_BATT\n");
      else
            gpio_direction_output(GPIO_SHUTDOWN_BATT, 0);

      raumfeld_common_init();
      raumfeld_power_init();
      raumfeld_lcd_init();
      raumfeld_w1_init();
}

static void __init raumfeld_connector_init(void)
{
      pxa3xx_mfp_config(ARRAY_AND_SIZE(raumfeld_connector_pin_config));
      spi_register_board_info(ARRAY_AND_SIZE(connector_spi_devices));
      i2c_register_board_info(0, &raumfeld_connector_i2c_board_info, 1);

      platform_device_register(&smc91x_device);

      raumfeld_audio_init();
      raumfeld_common_init();
}

static void __init raumfeld_speaker_init(void)
{
      pxa3xx_mfp_config(ARRAY_AND_SIZE(raumfeld_speaker_pin_config));
      spi_register_board_info(ARRAY_AND_SIZE(speaker_spi_devices));
      i2c_register_board_info(0, &raumfeld_connector_i2c_board_info, 1);

      platform_device_register(&smc91x_device);
      platform_device_register(&rotary_encoder_device);

      raumfeld_audio_init();
      raumfeld_common_init();
}

/* physical memory regions */
#define     RAUMFELD_SDRAM_BASE     0xa0000000  /* SDRAM region */

#ifdef CONFIG_MACH_RAUMFELD_RC
MACHINE_START(RAUMFELD_RC, "Raumfeld Controller")
      .boot_params      = RAUMFELD_SDRAM_BASE + 0x100,
      .init_machine     = raumfeld_controller_init,
      .map_io           = pxa3xx_map_io,
      .init_irq   = pxa3xx_init_irq,
      .timer            = &pxa_timer,
MACHINE_END
#endif

#ifdef CONFIG_MACH_RAUMFELD_CONNECTOR
MACHINE_START(RAUMFELD_CONNECTOR, "Raumfeld Connector")
      .boot_params      = RAUMFELD_SDRAM_BASE + 0x100,
      .init_machine     = raumfeld_connector_init,
      .map_io           = pxa3xx_map_io,
      .init_irq   = pxa3xx_init_irq,
      .timer            = &pxa_timer,
MACHINE_END
#endif

#ifdef CONFIG_MACH_RAUMFELD_SPEAKER
MACHINE_START(RAUMFELD_SPEAKER, "Raumfeld Speaker")
      .boot_params      = RAUMFELD_SDRAM_BASE + 0x100,
      .init_machine     = raumfeld_speaker_init,
      .map_io           = pxa3xx_map_io,
      .init_irq   = pxa3xx_init_irq,
      .timer            = &pxa_timer,
MACHINE_END
#endif

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