From 37c67d03989eca60b28d67398d9388f653454c5d Mon Sep 17 00:00:00 2001 From: Paul Walmsley Date: Mon, 29 Oct 2012 20:49:44 -0600 Subject: ARM: OMAP2+: WDT: move init; add read_reset_sources pdata function pointer The OMAP watchdog timer driver directly calls a function exported by code in arch/arm/mach-omap2. This is not good; it tightly couples this driver to the mach-omap2 integration code. Instead, add a temporary platform_data function pointer to abstract this function call. A subsequent patch will convert the watchdog driver to use this function pointer. This patch also moves the device creation code out of arch/arm/mach-omap2/devices.c and into arch/arm/mach-omap2/wd_timer.c. This is another step towards the removal of arch/arm/mach-omap2/devices.c. Cc: Wim Van Sebroeck Acked-by: Wim Van Sebroeck [paul@pwsan.com: skip wd_timer device creation when DT blob is present] Signed-off-by: Paul Walmsley --- include/linux/platform_data/omap-wd-timer.h | 38 +++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 include/linux/platform_data/omap-wd-timer.h (limited to 'include/linux/platform_data/omap-wd-timer.h') diff --git a/include/linux/platform_data/omap-wd-timer.h b/include/linux/platform_data/omap-wd-timer.h new file mode 100644 index 00000000000..d75f5f802d9 --- /dev/null +++ b/include/linux/platform_data/omap-wd-timer.h @@ -0,0 +1,38 @@ +/* + * OMAP2+ WDTIMER-specific function prototypes + * + * Copyright (C) 2012 Texas Instruments, Inc. + * Paul Walmsley + * + * 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. + */ + +#ifndef __LINUX_PLATFORM_DATA_OMAP_WD_TIMER_H +#define __LINUX_PLATFORM_DATA_OMAP_WD_TIMER_H + +#include + +/* + * Standardized OMAP reset source bits + * + * This is a subset of the ones listed in arch/arm/mach-omap2/prm.h + * and are the only ones needed in the watchdog driver. + */ +#define OMAP_MPU_WD_RST_SRC_ID_SHIFT 3 + +/** + * struct omap_wd_timer_platform_data - WDTIMER integration to the host SoC + * @read_reset_sources - fn ptr for the SoC to indicate the last reset cause + * + * The function pointed to by @read_reset_sources must return its data + * in a standard format - search for RST_SRC_ID_SHIFT in + * arch/arm/mach-omap2 + */ +struct omap_wd_timer_platform_data { + u32 (*read_reset_sources)(void); +}; + +#endif -- cgit v1.2.3