diff options
Diffstat (limited to 'arch/arm/plat-stmp3xxx/timer.c')
| -rw-r--r-- | arch/arm/plat-stmp3xxx/timer.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/arch/arm/plat-stmp3xxx/timer.c b/arch/arm/plat-stmp3xxx/timer.c deleted file mode 100644 index c395630a6edc..000000000000 --- a/arch/arm/plat-stmp3xxx/timer.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * System timer for Freescale STMP37XX/STMP378X - * - * Embedded Alley Solutions, Inc <source@embeddedalley.com> - * - * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. - * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. - */ - -/* - * The code contained herein is licensed under the GNU General Public - * License. You may obtain a copy of the GNU General Public License - * Version 2 or later at the following locations: - * - * http://www.opensource.org/licenses/gpl-license.html - * http://www.gnu.org/copyleft/gpl.html - */ -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/spinlock.h> -#include <linux/clocksource.h> -#include <linux/clockchips.h> -#include <linux/io.h> -#include <linux/irq.h> -#include <linux/interrupt.h> - -#include <asm/mach/time.h> -#include <mach/stmp3xxx.h> -#include <mach/platform.h> -#include <mach/regs-timrot.h> - -static irqreturn_t -stmp3xxx_timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *c = dev_id; - - /* timer 0 */ - if (__raw_readl(REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL0) & - BM_TIMROT_TIMCTRLn_IRQ) { - stmp3xxx_clearl(BM_TIMROT_TIMCTRLn_IRQ, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL0); - c->event_handler(c); - } - - /* timer 1 */ - else if (__raw_readl(REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL1) - & BM_TIMROT_TIMCTRLn_IRQ) { - stmp3xxx_clearl(BM_TIMROT_TIMCTRLn_IRQ, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL1); - stmp3xxx_clearl(BM_TIMROT_TIMCTRLn_IRQ_EN, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL1); - __raw_writel(0xFFFF, REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT1); - } - - return IRQ_HANDLED; -} - -static cycle_t stmp3xxx_clock_read(struct clocksource *cs) -{ - return ~((__raw_readl(REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT1) - & 0xFFFF0000) >> 16); -} - -static int -stmp3xxx_timrot_set_next_event(unsigned long delta, - struct clock_event_device *dev) -{ - /* reload the timer */ - __raw_writel(delta, REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT0); - return 0; -} - -static void -stmp3xxx_timrot_set_mode(enum clock_event_mode mode, - struct clock_event_device *dev) -{ -} - -static struct clock_event_device ckevt_timrot = { - .name = "timrot", - .features = CLOCK_EVT_FEAT_ONESHOT, - .shift = 32, - .set_next_event = stmp3xxx_timrot_set_next_event, - .set_mode = stmp3xxx_timrot_set_mode, -}; - -static struct clocksource cksrc_stmp3xxx = { - .name = "cksrc_stmp3xxx", - .rating = 250, - .read = stmp3xxx_clock_read, - .mask = CLOCKSOURCE_MASK(16), - .flags = CLOCK_SOURCE_IS_CONTINUOUS, -}; - -static struct irqaction stmp3xxx_timer_irq = { - .name = "stmp3xxx_timer", - .flags = IRQF_DISABLED | IRQF_TIMER, - .handler = stmp3xxx_timer_interrupt, - .dev_id = &ckevt_timrot, -}; - - -/* - * Set up timer interrupt, and return the current time in seconds. - */ -static void __init stmp3xxx_init_timer(void) -{ - ckevt_timrot.mult = div_sc(CLOCK_TICK_RATE, NSEC_PER_SEC, - ckevt_timrot.shift); - ckevt_timrot.min_delta_ns = clockevent_delta2ns(2, &ckevt_timrot); - ckevt_timrot.max_delta_ns = clockevent_delta2ns(0xFFF, &ckevt_timrot); - ckevt_timrot.cpumask = cpumask_of(0); - - stmp3xxx_reset_block(REGS_TIMROT_BASE, false); - - /* clear two timers */ - __raw_writel(0, REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT0); - __raw_writel(0, REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT1); - - /* configure them */ - __raw_writel( - (8 << BP_TIMROT_TIMCTRLn_SELECT) | /* 32 kHz */ - BM_TIMROT_TIMCTRLn_RELOAD | - BM_TIMROT_TIMCTRLn_UPDATE | - BM_TIMROT_TIMCTRLn_IRQ_EN, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL0); - __raw_writel( - (8 << BP_TIMROT_TIMCTRLn_SELECT) | /* 32 kHz */ - BM_TIMROT_TIMCTRLn_RELOAD | - BM_TIMROT_TIMCTRLn_UPDATE | - BM_TIMROT_TIMCTRLn_IRQ_EN, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL1); - - __raw_writel(CLOCK_TICK_RATE / HZ - 1, - REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT0); - __raw_writel(0xFFFF, REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT1); - - setup_irq(IRQ_TIMER0, &stmp3xxx_timer_irq); - - clocksource_register_hz(&cksrc_stmp3xxx, CLOCK_TICK_RATE); - clockevents_register_device(&ckevt_timrot); -} - -#ifdef CONFIG_PM - -void stmp3xxx_suspend_timer(void) -{ - stmp3xxx_clearl(BM_TIMROT_TIMCTRLn_IRQ_EN | BM_TIMROT_TIMCTRLn_IRQ, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL0); - stmp3xxx_setl(BM_TIMROT_ROTCTRL_CLKGATE, - REGS_TIMROT_BASE + HW_TIMROT_ROTCTRL); -} - -void stmp3xxx_resume_timer(void) -{ - stmp3xxx_clearl(BM_TIMROT_ROTCTRL_SFTRST | BM_TIMROT_ROTCTRL_CLKGATE, - REGS_TIMROT_BASE + HW_TIMROT_ROTCTRL); - __raw_writel( - 8 << BP_TIMROT_TIMCTRLn_SELECT | /* 32 kHz */ - BM_TIMROT_TIMCTRLn_RELOAD | - BM_TIMROT_TIMCTRLn_UPDATE | - BM_TIMROT_TIMCTRLn_IRQ_EN, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL0); - __raw_writel( - 8 << BP_TIMROT_TIMCTRLn_SELECT | /* 32 kHz */ - BM_TIMROT_TIMCTRLn_RELOAD | - BM_TIMROT_TIMCTRLn_UPDATE | - BM_TIMROT_TIMCTRLn_IRQ_EN, - REGS_TIMROT_BASE + HW_TIMROT_TIMCTRL1); - __raw_writel(CLOCK_TICK_RATE / HZ - 1, - REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT0); - __raw_writel(0xFFFF, REGS_TIMROT_BASE + HW_TIMROT_TIMCOUNT1); -} - -#else - -#define stmp3xxx_suspend_timer NULL -#define stmp3xxx_resume_timer NULL - -#endif /* CONFIG_PM */ - -struct sys_timer stmp3xxx_timer = { - .init = stmp3xxx_init_timer, - .suspend = stmp3xxx_suspend_timer, - .resume = stmp3xxx_resume_timer, -}; |