MIPS: add Atheros ar531x family support

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 73 insertions, 0 deletions

diff --git a/arch/mips/mach-ar231x/ar231x_reset.c b/arch/mips/mach-ar231x/ar231x_reset.c
new file mode 100644
index 0000000000..5ececb5c01
--- /dev/null
+++ b/arch/mips/mach-ar231x/ar231x_reset.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2013 Oleksij Rempel <linux@rempel-privat.de>
+ *
+ * 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.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <io.h>
+
+#include <mach/ar2312_regs.h>
+#include <mach/ar231x_platform.h>
+
+static void __iomem *reset_base;
+
+void __noreturn reset_cpu(ulong addr)
+{
+	printf("reseting cpu\n");
+	__raw_writel(0x10000,
+		(char *)KSEG1ADDR(AR2312_WD_TIMER));
+	__raw_writel(AR2312_WD_CTRL_RESET,
+		(char *)KSEG1ADDR(AR2312_WD_CTRL));
+	unreachable();
+}
+EXPORT_SYMBOL(reset_cpu);
+
+static u32 ar231x_reset_readl(void)
+{
+	return __raw_readl(reset_base);
+}
+
+static void ar231x_reset_writel(u32 val)
+{
+	__raw_writel(val, reset_base);
+}
+
+void ar231x_reset_bit(u32 val, enum reset_state state)
+{
+	u32 tmp;
+
+	tmp = ar231x_reset_readl();
+
+	if (state == REMOVE)
+		ar231x_reset_writel(tmp & ~val);
+	else
+		ar231x_reset_writel(tmp | val);
+}
+EXPORT_SYMBOL(ar231x_reset_bit);
+
+static int ar231x_reset_probe(struct device_d *dev)
+{
+	reset_base = dev_request_mem_region(dev, 0);
+	if (!reset_base) {
+		dev_err(dev, "could not get memory region\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static struct driver_d ar231x_reset_driver = {
+	.probe	= ar231x_reset_probe,
+	.name	= "ar231x_reset",
+};
+
+static int ar231x_reset_init(void)
+{
+	return platform_driver_register(&ar231x_reset_driver);
+}
+coredevice_initcall(ar231x_reset_init);