MIPS: copy pic32.h header file from asm/mach-pic32/ to include/platform-data/

There are currently some pic32 MIPS drivers that are in tree, and are
only configured to be compiled on the pic32 platform. There's a risk of
breaking some of these drivers when migrating drivers away from legacy
APIs. It happened to me with a pic32 clk driver.

Let's go ahead and copy the MIPS pic32.h header to
include/linux/platform_data/, and make a minor update to allow compiling
this on other architectures. This will make it easier, and cleaner to
enable COMPILE_TEST for some of these pic32 drivers.

The asm variant of the header file will be dropped once all drivers have
been updated.

Link: https://lore.kernel.org/linux-clk/CABx5tq+eOocJ41X-GSgkGy6S+s+Am1yCS099wqP695NtwALTmg@mail.gmail.com/T/
Signed-off-by: Brian Masney <bmasney@redhat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Author: masneyb

include/linux/platform_data/pic32.h

@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Joshua Henderson <joshua.henderson@microchip.com>
+ * Copyright (C) 2015 Microchip Technology Inc.  All rights reserved.
+ */
+#ifndef __LINUX_PLATFORM_DATA_PIC32_H
+#define __LINUX_PLATFORM_DATA_PIC32_H
+
+#include <linux/types.h>
+
+/*
+ * PIC32 register offsets for SET/CLR/INV where supported.
+ */
+#define PIC32_CLR(_reg)		((_reg) + 0x04)
+#define PIC32_SET(_reg)		((_reg) + 0x08)
+#define PIC32_INV(_reg)		((_reg) + 0x0C)
+
+/*
+ * PIC32 Base Register Offsets
+ */
+#define PIC32_BASE_CONFIG	0x1f800000
+#define PIC32_BASE_OSC		0x1f801200
+#define PIC32_BASE_RESET	0x1f801240
+#define PIC32_BASE_PPS		0x1f801400
+#define PIC32_BASE_UART		0x1f822000
+#define PIC32_BASE_PORT		0x1f860000
+#define PIC32_BASE_DEVCFG2	0x1fc4ff44
+
+#if defined(CONFIG_MACH_PIC32)
+/* Register unlock sequence required for some register access. */
+void pic32_syskey_unlock_debug(const char *fn, const ulong ln);
+#define pic32_syskey_unlock()	\
+	pic32_syskey_unlock_debug(__func__, __LINE__)
+#else
+/* COMPILE_TEST on all other architectures */
+#define pic32_syskey_unlock()
+#endif
+
+#endif /* __LINUX_PLATFORM_DATA_PIC32_H */