watchdog: implement bcm2835 watchdog

Move out of architecture code and add some real watchdog functionality.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 1 insertions, 123 deletions

diff --git a/arch/arm/mach-bcm283x/Makefile b/arch/arm/mach-bcm283x/Makefile
index 96ea69365e..940f98cbce 100644
--- a/arch/arm/mach-bcm283x/Makefile
+++ b/arch/arm/mach-bcm283x/Makefile
@@ -1 +1 @@
-obj-y += core.o mbox.o wd.o
+obj-y += core.o mbox.o
diff --git a/arch/arm/mach-bcm283x/include/mach/wd.h b/arch/arm/mach-bcm283x/include/mach/wd.h
deleted file mode 100644
index cdd22d48c0..0000000000
--- a/arch/arm/mach-bcm283x/include/mach/wd.h
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Extract from arch/arm/mach-bcm2708/include/mach/platform.h
- *
- * Copyright (C) 2010 Broadcom
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#ifndef _WD_H
-#define _WD_H
-
-/*
- * Watchdog
- */
-#define PM_RSTC		0x1c
-#define PM_RSTS		0x20
-#define PM_WDOG		0x24
-
-#define PM_WDOG_RESET				0000000000
-#define PM_PASSWORD				0x5a000000
-#define PM_WDOG_TIME_SET			0x000fffff
-#define PM_RSTC_WRCFG_CLR			0xffffffcf
-#define PM_RSTC_WRCFG_SET			0x00000030
-#define PM_RSTC_WRCFG_FULL_RESET		0x00000020
-#define PM_RSTC_RESET				0x00000102
-
-#define PM_RSTS_HADPOR_SET			0x00001000
-#define PM_RSTS_HADSRH_SET			0x00000400
-#define PM_RSTS_HADSRF_SET			0x00000200
-#define PM_RSTS_HADSRQ_SET			0x00000100
-#define PM_RSTS_HADWRH_SET			0x00000040
-#define PM_RSTS_HADWRF_SET			0x00000020
-#define PM_RSTS_HADWRQ_SET			0x00000010
-#define PM_RSTS_HADDRH_SET			0x00000004
-#define PM_RSTS_HADDRF_SET			0x00000002
-#define PM_RSTS_HADDRQ_SET			0x00000001
-
-#endif
diff --git a/arch/arm/mach-bcm283x/wd.c b/arch/arm/mach-bcm283x/wd.c
deleted file mode 100644
index 5a5188fd2e..0000000000
--- a/arch/arm/mach-bcm283x/wd.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * Copyright (C) 2017 Pengutronix, Lucas Stach <l.stach@pengutronix.de>
- *
- * Based on code from  Carlo Caione <carlo@carlocaione.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-#include <common.h>
-#include <init.h>
-#include <io.h>
-#include <restart.h>
-
-#include <mach/wd.h>
-
-static void __iomem *wd_base;
-
-#define RESET_TIMEOUT 10
-
-static void __noreturn bcm2835_restart_soc(struct restart_handler *rst)
-{
-	uint32_t rstc;
-
-	rstc = readl(wd_base + PM_RSTC);
-	rstc &= ~PM_RSTC_WRCFG_SET;
-	rstc |= PM_RSTC_WRCFG_FULL_RESET;
-	writel(PM_PASSWORD | RESET_TIMEOUT, wd_base +  PM_WDOG);
-	writel(PM_PASSWORD | rstc, wd_base + PM_RSTC);
-
-	hang();
-}
-
-static int bcm2835_wd_probe(struct device_d *dev)
-{
-	struct resource *iores;
-
-	iores = dev_request_mem_resource(dev, 0);
-	if (IS_ERR(iores)) {
-		dev_err(dev, "could not get memory region\n");
-		return PTR_ERR(iores);
-	}
-	wd_base = IOMEM(iores->start);
-
-	restart_handler_register_fn(bcm2835_restart_soc);
-
-	return 0;
-}
-
-static __maybe_unused struct of_device_id bcm2835_wd_dt_ids[] = {
-	{
-		.compatible = "brcm,bcm2835-pm-wdt",
-	}, {
-		/* sentinel */
-	},
-};
-
-static struct driver_d bcm2835_wd_driver = {
-	.name		= "bcm2835_wd",
-	.of_compatible	= DRV_OF_COMPAT(bcm2835_wd_dt_ids),
-	.probe		= bcm2835_wd_probe,
-};
-
-static int __init bcm2835_wd_init(void)
-{
-	return platform_driver_register(&bcm2835_wd_driver);
-}
-device_initcall(bcm2835_wd_init);