[MIPS] Add back support for LASAT platforms

Signed-off-by: Brian Murphy <brian@murphy.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/lasat/ds1603.h

@@ -0,0 +1,33 @@
+/*
+ * Dallas Semiconductors 1603 RTC driver
+ *
+ * Brian Murphy <brian@murphy.dk>
+ *
+ */
+#ifndef __DS1603_H
+#define __DS1603_H
+
+struct ds_defs {
+	volatile u32 *reg;
+	volatile u32 *data_reg;
+	u32 rst;
+	u32 clk;
+	u32 data;
+	u32 data_read_shift;
+	char data_reversed;
+	u32 huge_delay;
+};
+
+extern struct ds_defs *ds1603;
+
+unsigned long ds1603_read(void);
+int ds1603_set(unsigned long);
+void ds1603_set_trimmer(unsigned int);
+void ds1603_enable(void);
+void ds1603_disable(void);
+void ds1603_init(struct ds_defs *);
+
+#define TRIMMER_DEFAULT	3
+#define TRIMMER_DISABLE_RTC 0
+
+#endif