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>

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)

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

arch/arm/mach-at91/include/mach/gsia18s.h

+/* 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 */