From 8a4da6e36c582ff746191eca85b6c1c068dbfbd6 Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Mon, 12 Nov 2012 14:33:44 +0000 Subject: arm: arch_timer: move core to drivers/clocksource The core functionality of the arch_timer driver is not directly tied to anything under arch/arm, and can be split out. This patch factors out the core of the arch_timer driver, so it can be shared with other architectures. A couple of functions are added so that architecture-specific code can interact with the driver without needing to touch its internals. The ARM_ARCH_TIMER config variable is moved out to drivers/clocksource/Kconfig, existing uses in arch/arm are replaced with HAVE_ARM_ARCH_TIMER, which selects it. Signed-off-by: Mark Rutland Acked-by: Catalin Marinas Acked-by: Marc Zyngier --- include/clocksource/arm_arch_timer.h | 63 ++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 include/clocksource/arm_arch_timer.h (limited to 'include/clocksource') diff --git a/include/clocksource/arm_arch_timer.h b/include/clocksource/arm_arch_timer.h new file mode 100644 index 000000000000..b61f9961b0cc --- /dev/null +++ b/include/clocksource/arm_arch_timer.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) 2012 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ +#ifndef __CLKSOURCE_ARM_ARCH_TIMER_H +#define __CLKSOURCE_ARM_ARCH_TIMER_H + +#include +#include + +#define ARCH_TIMER_CTRL_ENABLE (1 << 0) +#define ARCH_TIMER_CTRL_IT_MASK (1 << 1) +#define ARCH_TIMER_CTRL_IT_STAT (1 << 2) + +#define ARCH_TIMER_REG_CTRL 0 +#define ARCH_TIMER_REG_TVAL 1 + +#define ARCH_TIMER_PHYS_ACCESS 0 +#define ARCH_TIMER_VIRT_ACCESS 1 + +#ifdef CONFIG_ARM_ARCH_TIMER + +extern int arch_timer_init(void); +extern u32 arch_timer_get_rate(void); +extern u64 (*arch_timer_read_counter)(void); +extern struct timecounter *arch_timer_get_timecounter(void); + +#else + +static inline int arch_timer_init(void) +{ + return -ENXIO; +} + +static inline u32 arch_timer_get_rate(void) +{ + return 0; +} + +static inline u64 arch_timer_read_counter(void) +{ + return 0; +} + +static struct timecounter *arch_timer_get_timecounter(void) +{ + return NULL; +} + +#endif + +#endif -- cgit v1.2.3