1 files changed, 70 insertions, 0 deletions
diff --git a/arch/mips/lantiq/xway/pmu.c b/arch/mips/lantiq/xway/pmu.c
new file mode 100644
index 0000000..9d69f01e
--- /dev/null
+++ b/arch/mips/lantiq/xway/pmu.c
@@ -0,0 +1,70 @@
+/*
+ *  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.
+ *
+ *  Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/ioport.h>
+
+#include <lantiq_soc.h>
+
+/* PMU - the power management unit allows us to turn part of the core
+ * on and off
+ */
+
+/* the enable / disable registers */
+#define LTQ_PMU_PWDCR	0x1C
+#define LTQ_PMU_PWDSR	0x20
+
+#define ltq_pmu_w32(x, y)	ltq_w32((x), ltq_pmu_membase + (y))
+#define ltq_pmu_r32(x)		ltq_r32(ltq_pmu_membase + (x))
+
+static struct resource ltq_pmu_resource = {
+	.name	= "pmu",
+	.start	= LTQ_PMU_BASE_ADDR,
+	.end	= LTQ_PMU_BASE_ADDR + LTQ_PMU_SIZE - 1,
+	.flags	= IORESOURCE_MEM,
+};
+
+static void __iomem *ltq_pmu_membase;
+
+void ltq_pmu_enable(unsigned int module)
+{
+	int err = 1000000;
+
+	ltq_pmu_w32(ltq_pmu_r32(LTQ_PMU_PWDCR) & ~module, LTQ_PMU_PWDCR);
+	do {} while (--err && (ltq_pmu_r32(LTQ_PMU_PWDSR) & module));
+
+	if (!err)
+		panic("activating PMU module failed!\n");
+}
+EXPORT_SYMBOL(ltq_pmu_enable);
+
+void ltq_pmu_disable(unsigned int module)
+{
+	ltq_pmu_w32(ltq_pmu_r32(LTQ_PMU_PWDCR) | module, LTQ_PMU_PWDCR);
+}
+EXPORT_SYMBOL(ltq_pmu_disable);
+
+int __init ltq_pmu_init(void)
+{
+	if (insert_resource(&iomem_resource, &ltq_pmu_resource) < 0)
+		panic("Failed to insert pmu memory\n");
+
+	if (request_mem_region(ltq_pmu_resource.start,
+			resource_size(&ltq_pmu_resource), "pmu") < 0)
+		panic("Failed to request pmu memory\n");
+
+	ltq_pmu_membase = ioremap_nocache(ltq_pmu_resource.start,
+				resource_size(&ltq_pmu_resource));
+	if (!ltq_pmu_membase)
+		panic("Failed to remap pmu memory\n");
+	return 0;
+}
+
+core_initcall(ltq_pmu_init);