From de0dab22cbf6943d0f12f3b1e2eb1bbdd807f039 Mon Sep 17 00:00:00 2001
From: Jean-Michel Hautbois <jeanmichel.hautbois@yoseli.org>
Date: Wed, 17 Jun 2026 21:17:16 +0200
Subject: [PATCH] m68k: coldfire/5441x: register mcf-rcm-reset platform device

Add SoC-level registration of the mcf-rcm-reset platform device so the
power_on_reason sysfs attribute is created on every MCF5441x board
without per-board boilerplate.

Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@yoseli.org>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
---
 arch/m68k/coldfire/m5441x.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/arch/m68k/coldfire/m5441x.c b/arch/m68k/coldfire/m5441x.c
index 5b5e09ecf487..ad3d0021578f 100644
--- a/arch/m68k/coldfire/m5441x.c
+++ b/arch/m68k/coldfire/m5441x.c
@@ -11,6 +11,7 @@
 #include <linux/init.h>
 #include <linux/io.h>
 #include <linux/clk.h>
+#include <linux/platform_device.h>
 #include <asm/machdep.h>
 #include <asm/coldfire.h>
 #include <asm/mcfsim.h>
@@ -242,6 +243,30 @@ static void __init m5441x_fec_init(void)
 	mcf_write8(0x03, MCFGPIO_PAR_FEC);
 }
 
+/*
+ * Reset Controller Module status register. Exposed to userspace as
+ * /sys/devices/platform/mcf-rcm-reset/power_on_reason by the mcf-rcm-reset
+ * driver (drivers/power/reset/mcf-rcm-reset.c).
+ */
+static struct resource m5441x_rcm_resource[] = {
+	{
+		.start	= MCF_RSR,
+		.end	= MCF_RSR,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static int __init m5441x_rcm_init(void)
+{
+	struct platform_device *pdev;
+
+	pdev = platform_device_register_simple("mcf-rcm-reset", -1,
+					       m5441x_rcm_resource,
+					       ARRAY_SIZE(m5441x_rcm_resource));
+	return PTR_ERR_OR_ZERO(pdev);
+}
+arch_initcall(m5441x_rcm_init);
+
 void __init config_BSP(char *commandp, int size)
 {
 	m5441x_clk_init();