AT91: Support for gsia18s board
authorIgor Plyatov <plyatov@gmail.com>
Fri, 14 Jan 2011 18:01:13 +0000 (19:01 +0100)
committerNicolas Ferre <nicolas.ferre@atmel.com>
Fri, 14 Jan 2011 18:49:04 +0000 (19:49 +0100)
The GS_IA18_S (GMS) is a carrier board from GeoSIG Ltd used with the
Stamp9G20 SoM from Taskit company.
It operate as an internet accelerometer.

Signed-off-by: Igor Plyatov <plyatov@gmail.com>
[nicolas.ferre@atmel.com: rm Kconfig, whitespace fixes, change machine name]
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
arch/arm/mach-at91/Kconfig
arch/arm/mach-at91/Makefile
arch/arm/mach-at91/board-gsia18s.c [new file with mode: 0644]
arch/arm/mach-at91/include/mach/gsia18s.h [new file with mode: 0644]

index 06fb66d53203c609d4cb40811c54ad7c972e5595..19390231a0e98d5e792c64e487269e5f75a2ba23 100644 (file)
@@ -387,6 +387,13 @@ config MACH_PCONTROL_G20
          Select this if you are using taskit's Stamp9G20 CPU module on this
          carrier board, beeing the decentralized unit of a building automation
          system; featuring nvram, eth-switch, iso-rs485, display, io
+
+config MACH_GSIA18S
+       bool "GS_IA18_S board"
+       help
+         This enables support for the GS_IA18_S board
+         produced by GeoSIG Ltd company. This is an internet accelerograph.
+         <http://www.geosig.com>
 endif
 
 if (ARCH_AT91SAM9260 || ARCH_AT91SAM9G20)
index 5ef548ee58b4229c025c689ce811dc603198ebea..a83835e0c1859b359fd15f75f45125a81525a4d8 100644 (file)
@@ -67,6 +67,7 @@ obj-$(CONFIG_MACH_ACMENETUSFOXG20) += board-foxg20.o
 obj-$(CONFIG_MACH_STAMP9G20)   += board-stamp9g20.o
 obj-$(CONFIG_MACH_PORTUXG20)   += board-stamp9g20.o
 obj-$(CONFIG_MACH_PCONTROL_G20)        += board-pcontrol-g20.o board-stamp9g20.o
+obj-$(CONFIG_MACH_GSIA18S)     += board-gsia18s.o board-stamp9g20.o
 
 # AT91SAM9260/AT91SAM9G20 board-specific support
 obj-$(CONFIG_MACH_SNAPPER_9260)        += board-snapper9260.o
diff --git a/arch/arm/mach-at91/board-gsia18s.c b/arch/arm/mach-at91/board-gsia18s.c
new file mode 100644 (file)
index 0000000..bc28136
--- /dev/null
@@ -0,0 +1,584 @@
+/*
+ *  Copyright (C) 2010 Christian Glindkamp <christian.glindkamp@taskit.de>
+ *                     taskit GmbH
+ *                2010 Igor Plyatov <plyatov@gmail.com>
+ *                     GeoSIG Ltd
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/w1-gpio.h>
+#include <linux/i2c.h>
+#include <linux/i2c/pcf857x.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+
+#include <mach/board.h>
+#include <mach/at91sam9_smc.h>
+#include <mach/gsia18s.h>
+#include <mach/stamp9g20.h>
+
+#include "sam9_smc.h"
+#include "generic.h"
+
+static void __init gsia18s_map_io(void)
+{
+       stamp9g20_map_io();
+
+       /*
+        * USART0 on ttyS1 (Rx, Tx, CTS, RTS, DTR, DSR, DCD, RI).
+        * Used for Internal Analog Modem.
+        */
+       at91_register_uart(AT91SAM9260_ID_US0, 1,
+                               ATMEL_UART_CTS | ATMEL_UART_RTS |
+                               ATMEL_UART_DTR | ATMEL_UART_DSR |
+                               ATMEL_UART_DCD | ATMEL_UART_RI);
+       /*
+        * USART1 on ttyS2 (Rx, Tx, CTS, RTS).
+        * Used for GPS or WiFi or Data stream.
+        */
+       at91_register_uart(AT91SAM9260_ID_US1, 2,
+                               ATMEL_UART_CTS | ATMEL_UART_RTS);
+       /*
+        * USART2 on ttyS3 (Rx, Tx, CTS, RTS).
+        * Used for External Modem.
+        */
+       at91_register_uart(AT91SAM9260_ID_US2, 3,
+                               ATMEL_UART_CTS | ATMEL_UART_RTS);
+       /*
+        * USART3 on ttyS4 (Rx, Tx, RTS).
+        * Used for RS-485.
+        */
+       at91_register_uart(AT91SAM9260_ID_US3, 4, ATMEL_UART_RTS);
+
+       /*
+        * USART4 on ttyS5 (Rx, Tx).
+        * Used for TRX433 Radio Module.
+        */
+       at91_register_uart(AT91SAM9260_ID_US4, 5, 0);
+}
+
+static void __init init_irq(void)
+{
+       at91sam9260_init_interrupts(NULL);
+}
+
+/*
+ * Two USB Host ports
+ */
+static struct at91_usbh_data __initdata usbh_data = {
+       .ports          = 2,
+};
+
+/*
+ * USB Device port
+ */
+static struct at91_udc_data __initdata udc_data = {
+       .vbus_pin       = AT91_PIN_PA22,
+       .pullup_pin     = 0,            /* pull-up driven by UDC */
+};
+
+/*
+ * MACB Ethernet device
+ */
+static struct at91_eth_data __initdata macb_data = {
+       .phy_irq_pin    = AT91_PIN_PA28,
+       .is_rmii        = 1,
+};
+
+/*
+ * LEDs and GPOs
+ */
+static struct gpio_led gpio_leds[] = {
+       {
+               .name                   = "gpo:spi1reset",
+               .gpio                   = AT91_PIN_PC1,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       {
+               .name                   = "gpo:trig_net_out",
+               .gpio                   = AT91_PIN_PB20,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       {
+               .name                   = "gpo:trig_net_dir",
+               .gpio                   = AT91_PIN_PB19,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       {
+               .name                   = "gpo:charge_dis",
+               .gpio                   = AT91_PIN_PC2,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       {
+               .name                   = "led:event",
+               .gpio                   = AT91_PIN_PB17,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       {
+               .name                   = "led:lan",
+               .gpio                   = AT91_PIN_PB18,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       {
+               .name                   = "led:error",
+               .gpio                   = AT91_PIN_PB16,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_ON,
+       }
+};
+
+static struct gpio_led_platform_data gpio_led_info = {
+       .leds           = gpio_leds,
+       .num_leds       = ARRAY_SIZE(gpio_leds),
+};
+
+static struct platform_device leds = {
+       .name   = "leds-gpio",
+       .id     = 0,
+       .dev    = {
+               .platform_data  = &gpio_led_info,
+       }
+};
+
+static void __init gsia18s_leds_init(void)
+{
+       platform_device_register(&leds);
+}
+
+/* PCF8574 0x20 GPIO - U1 on the GS_IA18-CB_V3 board */
+static struct gpio_led pcf_gpio_leds1[] = {
+       { /* bit 0 */
+               .name                   = "gpo:hdc_power",
+               .gpio                   = PCF_GPIO_HDC_POWER,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 1 */
+               .name                   = "gpo:wifi_setup",
+               .gpio                   = PCF_GPIO_WIFI_SETUP,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 2 */
+               .name                   = "gpo:wifi_enable",
+               .gpio                   = PCF_GPIO_WIFI_ENABLE,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 3      */
+               .name                   = "gpo:wifi_reset",
+               .gpio                   = PCF_GPIO_WIFI_RESET,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_ON,
+       },
+       /* bit 4 used as GPI    */
+       { /* bit 5 */
+               .name                   = "gpo:gps_setup",
+               .gpio                   = PCF_GPIO_GPS_SETUP,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 6 */
+               .name                   = "gpo:gps_standby",
+               .gpio                   = PCF_GPIO_GPS_STANDBY,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_ON,
+       },
+       { /* bit 7 */
+               .name                   = "gpo:gps_power",
+               .gpio                   = PCF_GPIO_GPS_POWER,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       }
+};
+
+static struct gpio_led_platform_data pcf_gpio_led_info1 = {
+       .leds           = pcf_gpio_leds1,
+       .num_leds       = ARRAY_SIZE(pcf_gpio_leds1),
+};
+
+static struct platform_device pcf_leds1 = {
+       .name   = "leds-gpio", /* GS_IA18-CB_board */
+       .id     = 1,
+       .dev    = {
+               .platform_data  = &pcf_gpio_led_info1,
+       }
+};
+
+/* PCF8574 0x22 GPIO - U1 on the GS_2G_OPT1-A_V0 board (Alarm) */
+static struct gpio_led pcf_gpio_leds2[] = {
+       { /* bit 0 */
+               .name                   = "gpo:alarm_1",
+               .gpio                   = PCF_GPIO_ALARM1,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 1 */
+               .name                   = "gpo:alarm_2",
+               .gpio                   = PCF_GPIO_ALARM2,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 2 */
+               .name                   = "gpo:alarm_3",
+               .gpio                   = PCF_GPIO_ALARM3,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       { /* bit 3 */
+               .name                   = "gpo:alarm_4",
+               .gpio                   = PCF_GPIO_ALARM4,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+       /* bits 4, 5, 6 not used */
+       { /* bit 7 */
+               .name                   = "gpo:alarm_v_relay_on",
+               .gpio                   = PCF_GPIO_ALARM_V_RELAY_ON,
+               .active_low             = 0,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+};
+
+static struct gpio_led_platform_data pcf_gpio_led_info2 = {
+       .leds           = pcf_gpio_leds2,
+       .num_leds       = ARRAY_SIZE(pcf_gpio_leds2),
+};
+
+static struct platform_device pcf_leds2 = {
+       .name   = "leds-gpio",
+       .id     = 2,
+       .dev    = {
+               .platform_data  = &pcf_gpio_led_info2,
+       }
+};
+
+/* PCF8574 0x24 GPIO U1 on the GS_2G-OPT23-A_V0 board (Modem) */
+static struct gpio_led pcf_gpio_leds3[] = {
+       { /* bit 0 */
+               .name                   = "gpo:modem_power",
+               .gpio                   = PCF_GPIO_MODEM_POWER,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_OFF,
+       },
+               /* bits 1 and 2 not used */
+       { /* bit 3 */
+               .name                   = "gpo:modem_reset",
+               .gpio                   = PCF_GPIO_MODEM_RESET,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_ON,
+       },
+               /* bits 4, 5 and 6 not used */
+       { /* bit 7 */
+               .name                   = "gpo:trx_reset",
+               .gpio                   = PCF_GPIO_TRX_RESET,
+               .active_low             = 1,
+               .default_trigger        = "none",
+               .default_state          = LEDS_GPIO_DEFSTATE_ON,
+       }
+};
+
+static struct gpio_led_platform_data pcf_gpio_led_info3 = {
+       .leds           = pcf_gpio_leds3,
+       .num_leds       = ARRAY_SIZE(pcf_gpio_leds3),
+};
+
+static struct platform_device pcf_leds3 = {
+       .name   = "leds-gpio",
+       .id     = 3,
+       .dev    = {
+               .platform_data  = &pcf_gpio_led_info3,
+       }
+};
+
+static void __init gsia18s_pcf_leds_init(void)
+{
+       platform_device_register(&pcf_leds1);
+       platform_device_register(&pcf_leds2);
+       platform_device_register(&pcf_leds3);
+}
+
+/*
+ * SPI busses.
+ */
+static struct spi_board_info gsia18s_spi_devices[] = {
+       { /* User accessible spi0, cs0 used for communication with MSP RTC */
+               .modalias       = "spidev",
+               .bus_num        = 0,
+               .chip_select    = 0,
+               .max_speed_hz   = 580000,
+               .mode           = SPI_MODE_1,
+       },
+       { /* User accessible spi1, cs0 used for communication with int. DSP */
+               .modalias       = "spidev",
+               .bus_num        = 1,
+               .chip_select    = 0,
+               .max_speed_hz   = 5600000,
+               .mode           = SPI_MODE_0,
+       },
+       { /* User accessible spi1, cs1 used for communication with ext. DSP */
+               .modalias       = "spidev",
+               .bus_num        = 1,
+               .chip_select    = 1,
+               .max_speed_hz   = 5600000,
+               .mode           = SPI_MODE_0,
+       },
+       { /* User accessible spi1, cs2 used for communication with ext. DSP */
+               .modalias       = "spidev",
+               .bus_num        = 1,
+               .chip_select    = 2,
+               .max_speed_hz   = 5600000,
+               .mode           = SPI_MODE_0,
+       },
+       { /* User accessible spi1, cs3 used for communication with ext. DSP */
+               .modalias       = "spidev",
+               .bus_num        = 1,
+               .chip_select    = 3,
+               .max_speed_hz   = 5600000,
+               .mode           = SPI_MODE_0,
+       }
+};
+
+/*
+ * GPI Buttons
+ */
+static struct gpio_keys_button buttons[] = {
+       {
+               .gpio           = GPIO_TRIG_NET_IN,
+               .code           = BTN_1,
+               .desc           = "TRIG_NET_IN",
+               .type           = EV_KEY,
+               .active_low     = 0,
+               .wakeup         = 1,
+       },
+       { /* SW80 on the GS_IA18_S-MN board*/
+               .gpio           = GPIO_CARD_UNMOUNT_0,
+               .code           = BTN_2,
+               .desc           = "Card umount 0",
+               .type           = EV_KEY,
+               .active_low     = 1,
+               .wakeup         = 1,
+       },
+       { /* SW79 on the GS_IA18_S-MN board*/
+               .gpio           = GPIO_CARD_UNMOUNT_1,
+               .code           = BTN_3,
+               .desc           = "Card umount 1",
+               .type           = EV_KEY,
+               .active_low     = 1,
+               .wakeup         = 1,
+       },
+       { /* SW280 on the GS_IA18-CB board*/
+               .gpio           = GPIO_KEY_POWER,
+               .code           = KEY_POWER,
+               .desc           = "Power Off Button",
+               .type           = EV_KEY,
+               .active_low     = 0,
+               .wakeup         = 1,
+       }
+};
+
+static struct gpio_keys_platform_data button_data = {
+       .buttons        = buttons,
+       .nbuttons       = ARRAY_SIZE(buttons),
+};
+
+static struct platform_device button_device = {
+       .name           = "gpio-keys",
+       .id             = -1,
+       .num_resources  = 0,
+       .dev            = {
+               .platform_data  = &button_data,
+       }
+};
+
+static void __init gsia18s_add_device_buttons(void)
+{
+       at91_set_gpio_input(GPIO_TRIG_NET_IN, 1);
+       at91_set_deglitch(GPIO_TRIG_NET_IN, 1);
+       at91_set_gpio_input(GPIO_CARD_UNMOUNT_0, 1);
+       at91_set_deglitch(GPIO_CARD_UNMOUNT_0, 1);
+       at91_set_gpio_input(GPIO_CARD_UNMOUNT_1, 1);
+       at91_set_deglitch(GPIO_CARD_UNMOUNT_1, 1);
+       at91_set_gpio_input(GPIO_KEY_POWER, 0);
+       at91_set_deglitch(GPIO_KEY_POWER, 1);
+
+       platform_device_register(&button_device);
+}
+
+/*
+ * I2C
+ */
+static int pcf8574x_0x20_setup(struct i2c_client *client, int gpio,
+                               unsigned int ngpio, void *context)
+{
+       int status;
+
+       status = gpio_request(gpio + PCF_GPIO_ETH_DETECT, "eth_det");
+       if (status < 0) {
+               pr_err("error: can't request GPIO%d\n",
+                       gpio + PCF_GPIO_ETH_DETECT);
+               return status;
+       }
+       status = gpio_direction_input(gpio + PCF_GPIO_ETH_DETECT);
+       if (status < 0) {
+               pr_err("error: can't setup GPIO%d as input\n",
+                       gpio + PCF_GPIO_ETH_DETECT);
+               return status;
+       }
+       status = gpio_export(gpio + PCF_GPIO_ETH_DETECT, false);
+       if (status < 0) {
+               pr_err("error: can't export GPIO%d\n",
+                       gpio + PCF_GPIO_ETH_DETECT);
+               return status;
+       }
+       status = gpio_sysfs_set_active_low(gpio + PCF_GPIO_ETH_DETECT, 1);
+       if (status < 0) {
+               pr_err("error: gpio_sysfs_set active_low(GPIO%d, 1)\n",
+                       gpio + PCF_GPIO_ETH_DETECT);
+               return status;
+       }
+
+       return 0;
+}
+
+static int pcf8574x_0x20_teardown(struct i2c_client *client, int gpio,
+                                       unsigned ngpio, void *context)
+{
+       gpio_free(gpio + PCF_GPIO_ETH_DETECT);
+       return 0;
+}
+
+static struct pcf857x_platform_data pcf20_pdata = {
+       .gpio_base      = GS_IA18_S_PCF_GPIO_BASE0,
+       .n_latch        = (1 << 4),
+       .setup          = pcf8574x_0x20_setup,
+       .teardown       = pcf8574x_0x20_teardown,
+};
+
+static struct pcf857x_platform_data pcf22_pdata = {
+       .gpio_base      = GS_IA18_S_PCF_GPIO_BASE1,
+};
+
+static struct pcf857x_platform_data pcf24_pdata = {
+       .gpio_base      = GS_IA18_S_PCF_GPIO_BASE2,
+};
+
+static struct i2c_board_info __initdata gsia18s_i2c_devices[] = {
+       { /* U1 on the GS_IA18-CB_V3 board */
+               I2C_BOARD_INFO("pcf8574", 0x20),
+               .platform_data = &pcf20_pdata,
+       },
+       { /* U1 on the GS_2G_OPT1-A_V0 board (Alarm) */
+               I2C_BOARD_INFO("pcf8574", 0x22),
+               .platform_data = &pcf22_pdata,
+       },
+       { /* U1 on the GS_2G-OPT23-A_V0 board (Modem) */
+               I2C_BOARD_INFO("pcf8574", 0x24),
+               .platform_data = &pcf24_pdata,
+       },
+       { /* U161 on the GS_IA18_S-MN board */
+               I2C_BOARD_INFO("24c1024", 0x50),
+       },
+       { /* U162 on the GS_IA18_S-MN board */
+               I2C_BOARD_INFO("24c01", 0x53),
+       },
+};
+
+/*
+ * Compact Flash
+ */
+static struct at91_cf_data __initdata gsia18s_cf1_data = {
+       .irq_pin        = AT91_PIN_PA27,
+       .det_pin        = AT91_PIN_PB30,
+       .rst_pin        = AT91_PIN_PB31,
+       .chipselect     = 5,
+       .flags          = AT91_CF_TRUE_IDE,
+};
+
+/* Power Off by RTC */
+static void gsia18s_power_off(void)
+{
+       pr_notice("Power supply will be switched off automatically now or after 60 seconds without ArmDAS.\n");
+       at91_set_gpio_output(AT91_PIN_PA25, 1);
+       /* Spin to death... */
+       while (1)
+               ;
+}
+
+static int __init gsia18s_power_off_init(void)
+{
+       pm_power_off = gsia18s_power_off;
+       return 0;
+}
+
+/* ---------------------------------------------------------------------------*/
+
+static void __init gsia18s_board_init(void)
+{
+       stamp9g20_board_init();
+       at91_add_device_usbh(&usbh_data);
+       at91_add_device_udc(&udc_data);
+       at91_add_device_eth(&macb_data);
+       gsia18s_leds_init();
+       gsia18s_pcf_leds_init();
+       gsia18s_add_device_buttons();
+       at91_add_device_i2c(gsia18s_i2c_devices,
+                               ARRAY_SIZE(gsia18s_i2c_devices));
+       at91_add_device_cf(&gsia18s_cf1_data);
+       at91_add_device_spi(gsia18s_spi_devices,
+                               ARRAY_SIZE(gsia18s_spi_devices));
+       gsia18s_power_off_init();
+}
+
+MACHINE_START(GSIA18S, "GS_IA18_S")
+       .boot_params    = AT91_SDRAM_BASE + 0x100,
+       .timer          = &at91sam926x_timer,
+       .map_io         = gsia18s_map_io,
+       .init_irq       = init_irq,
+       .init_machine   = gsia18s_board_init,
+MACHINE_END
diff --git a/arch/arm/mach-at91/include/mach/gsia18s.h b/arch/arm/mach-at91/include/mach/gsia18s.h
new file mode 100644 (file)
index 0000000..307c194
--- /dev/null
@@ -0,0 +1,33 @@
+/* Buttons */
+#define GPIO_TRIG_NET_IN               AT91_PIN_PB21
+#define GPIO_CARD_UNMOUNT_0            AT91_PIN_PB13
+#define GPIO_CARD_UNMOUNT_1            AT91_PIN_PB12
+#define GPIO_KEY_POWER                 AT91_PIN_PA25
+
+/* PCF8574 0x20 GPIO - U1 on the GS_IA18-CB_V3 board */
+#define GS_IA18_S_PCF_GPIO_BASE0       NR_BUILTIN_GPIO
+#define PCF_GPIO_HDC_POWER             (GS_IA18_S_PCF_GPIO_BASE0 + 0)
+#define PCF_GPIO_WIFI_SETUP            (GS_IA18_S_PCF_GPIO_BASE0 + 1)
+#define PCF_GPIO_WIFI_ENABLE           (GS_IA18_S_PCF_GPIO_BASE0 + 2)
+#define PCF_GPIO_WIFI_RESET            (GS_IA18_S_PCF_GPIO_BASE0 + 3)
+#define PCF_GPIO_ETH_DETECT            4 /* this is a GPI */
+#define PCF_GPIO_GPS_SETUP             (GS_IA18_S_PCF_GPIO_BASE0 + 5)
+#define PCF_GPIO_GPS_STANDBY           (GS_IA18_S_PCF_GPIO_BASE0 + 6)
+#define PCF_GPIO_GPS_POWER             (GS_IA18_S_PCF_GPIO_BASE0 + 7)
+
+/* PCF8574 0x22 GPIO - U1 on the GS_2G_OPT1-A_V0 board (Alarm) */
+#define GS_IA18_S_PCF_GPIO_BASE1       (GS_IA18_S_PCF_GPIO_BASE0 + 8)
+#define PCF_GPIO_ALARM1                        (GS_IA18_S_PCF_GPIO_BASE1 + 0)
+#define PCF_GPIO_ALARM2                        (GS_IA18_S_PCF_GPIO_BASE1 + 1)
+#define PCF_GPIO_ALARM3                        (GS_IA18_S_PCF_GPIO_BASE1 + 2)
+#define PCF_GPIO_ALARM4                        (GS_IA18_S_PCF_GPIO_BASE1 + 3)
+/* bits 4, 5, 6 not used */
+#define PCF_GPIO_ALARM_V_RELAY_ON      (GS_IA18_S_PCF_GPIO_BASE1 + 7)
+
+/* PCF8574 0x24 GPIO U1 on the GS_2G-OPT23-A_V0 board (Modem) */
+#define GS_IA18_S_PCF_GPIO_BASE2       (GS_IA18_S_PCF_GPIO_BASE1 + 8)
+#define PCF_GPIO_MODEM_POWER           (GS_IA18_S_PCF_GPIO_BASE2 + 0)
+#define PCF_GPIO_MODEM_RESET           (GS_IA18_S_PCF_GPIO_BASE2 + 3)
+/* bits 1, 2, 4, 5 not used */
+#define PCF_GPIO_TRX_RESET             (GS_IA18_S_PCF_GPIO_BASE2 + 6)
+/* bit 7 not used */