AT91: Support for gsia18s board

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>

4 files changed, 625 insertions, 0 deletions

diff --git a/arch/arm/mach-at91/Kconfig b/arch/arm/mach-at91/Kconfig
index 06fb66d53203..19390231a0e9 100644
--- a/arch/arm/mach-at91/Kconfig
+++ b/arch/arm/mach-at91/Kconfig
@@ -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)
diff --git a/arch/arm/mach-at91/Makefile b/arch/arm/mach-at91/Makefile
index 5ef548ee58b4..a83835e0c185 100644
--- a/arch/arm/mach-at91/Makefile
+++ b/arch/arm/mach-at91/Makefile
@@ -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
index 000000000000..bc28136ee249
--- /dev/null
+++ b/arch/arm/mach-at91/board-gsia18s.c
@@ -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
index 000000000000..307c194926f9
--- /dev/null
+++ b/arch/arm/mach-at91/include/mach/gsia18s.h
@@ -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 */