MIPS: ath79: add initial support for the Atheros PB44 reference board

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: Imre Kaloz <kaloz@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: Cliff Holden <Cliff.Holden@Atheros.com>
Cc: Kathy Giori <Kathy.Giori@Atheros.com>
Patchwork: https://patchwork.linux-mips.org/patch/1950/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/ath79/Kconfig

@@ -1,5 +1,16 @@
 if ATH79
 
+menu "Atheros AR71XX/AR724X/AR913X machine selection"
+
+config ATH79_MACH_PB44
+	bool "Atheros PB44 reference board"
+	select SOC_AR71XX
+	help
+	  Say 'Y' here if you want your kernel to support the
+	  Atheros PB44 reference board.
+
+endmenu
+
 config SOC_AR71XX
 	def_bool n
 

arch/mips/ath79/Makefile

@@ -16,3 +16,8 @@ obj-$(CONFIG_EARLY_PRINTK)		+= early_printk.o
 # Devices
 #
 obj-y					+= dev-common.o
+
+#
+# Machines
+#
+obj-$(CONFIG_ATH79_MACH_PB44)		+= mach-pb44.o

arch/mips/ath79/mach-pb44.c

@@ -0,0 +1,56 @@
+/*
+ *  Atheros PB44 reference board support
+ *
+ *  Copyright (C) 2009-2010 Gabor Juhos <juhosg@openwrt.org>
+ *
+ *  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/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/i2c-gpio.h>
+#include <linux/i2c/pcf857x.h>
+
+#include "machtypes.h"
+
+#define PB44_GPIO_I2C_SCL	0
+#define PB44_GPIO_I2C_SDA	1
+
+#define PB44_GPIO_EXP_BASE	16
+
+static struct i2c_gpio_platform_data pb44_i2c_gpio_data = {
+	.sda_pin        = PB44_GPIO_I2C_SDA,
+	.scl_pin        = PB44_GPIO_I2C_SCL,
+};
+
+static struct platform_device pb44_i2c_gpio_device = {
+	.name		= "i2c-gpio",
+	.id		= 0,
+	.dev = {
+		.platform_data	= &pb44_i2c_gpio_data,
+	}
+};
+
+static struct pcf857x_platform_data pb44_pcf857x_data = {
+	.gpio_base	= PB44_GPIO_EXP_BASE,
+};
+
+static struct i2c_board_info pb44_i2c_board_info[] __initdata = {
+	{
+		I2C_BOARD_INFO("pcf8575", 0x20),
+		.platform_data  = &pb44_pcf857x_data,
+	},
+};
+
+static void __init pb44_init(void)
+{
+	i2c_register_board_info(0, pb44_i2c_board_info,
+				ARRAY_SIZE(pb44_i2c_board_info));
+	platform_device_register(&pb44_i2c_gpio_device);
+}
+
+MIPS_MACHINE(ATH79_MACH_PB44, "PB44", "Atheros PB44 reference board",
+	     pb44_init);

arch/mips/ath79/machtypes.h

@@ -16,6 +16,7 @@
 
 enum ath79_mach_type {
 	ATH79_MACH_GENERIC = 0,
+	ATH79_MACH_PB44,		/* Atheros PB44 reference board */
 };
 
 #endif /* _ATH79_MACHTYPE_H */