linux-kernel - [PATCH v2 04/16] MIPS: copy pic32.h header file from asm/mach-pic32/ to include/platform-data/

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Message-Id: <20260112-mips-pic32-header-move-v2-4-927d516b1ff9@redhat.com>
Date: Mon, 12 Jan 2026 17:47:58 -0500
From: Brian Masney <bmasney@...hat.com>
To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
 Claudiu Beznea <claudiu.beznea@...on.dev>
Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Brian Masney <bmasney@...hat.com>
Subject: [PATCH v2 04/16] 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@...hat.com>

---
Cc: linux-kernel@...r.kernel.org
---
 include/linux/platform_data/pic32.h | 39 +++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/include/linux/platform_data/pic32.h b/include/linux/platform_data/pic32.h
new file mode 100644
index 0000000000000000000000000000000000000000..f0b395fdb784fa8b7e19029b9ff97f761dbf1088
--- /dev/null
+++ b/include/linux/platform_data/pic32.h
@@ -0,0 +1,39 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Joshua Henderson <joshua.henderson@...rochip.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 */

-- 
2.52.0