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| author | Ralf Baechle <ralf@linux-mips.org> | 2007-10-18 01:10:12 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2007-10-18 18:11:46 +0100 |
| commit | 832348ff0bf1538e026ff862f91ab6db06e73499 (patch) | |
| tree | d47a4f085b2783a652ad963782329fbf02380202 /arch/mips/jmr3927 | |
| parent | 15ad838d281b3681d96e37cba8a628177da8f4ff (diff) | |
| download | linux-832348ff0bf1538e026ff862f91ab6db06e73499.tar.gz linux-832348ff0bf1538e026ff862f91ab6db06e73499.tar.bz2 linux-832348ff0bf1538e026ff862f91ab6db06e73499.zip | |
[MIPS] JMR3927: Convert to clock_event_device.
This separate the tick timer stuff from the generic MIPS time.c.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/jmr3927')
| -rw-r--r-- | arch/mips/jmr3927/rbhma3100/setup.c | 66 |
1 files changed, 47 insertions, 19 deletions
diff --git a/arch/mips/jmr3927/rbhma3100/setup.c b/arch/mips/jmr3927/rbhma3100/setup.c index 0c7aee1682cd..edb9e59248ec 100644 --- a/arch/mips/jmr3927/rbhma3100/setup.c +++ b/arch/mips/jmr3927/rbhma3100/setup.c @@ -1,15 +1,4 @@ -/*********************************************************************** - * - * Copyright 2001 MontaVista Software Inc. - * Author: MontaVista Software, Inc. - * ahennessy@mvista.com - * - * Based on arch/mips/ddb5xxx/ddb5477/setup.c - * - * Setup file for JMR3927. - * - * Copyright (C) 2000-2001 Toshiba Corporation - * +/* * 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 @@ -30,9 +19,15 @@ * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. * - *********************************************************************** + * Copyright 2001 MontaVista Software Inc. + * Author: MontaVista Software, Inc. + * ahennessy@mvista.com + * + * Copyright (C) 2000-2001 Toshiba Corporation + * Copyright (C) 2007 Ralf Baechle (ralf@linux-mips.org) */ +#include <linux/clockchips.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/kdev_t.h> @@ -104,27 +99,60 @@ static cycle_t jmr3927_hpt_read(void) return jiffies * (JMR3927_TIMER_CLK / HZ) + jmr3927_tmrptr->trr; } -static void jmr3927_timer_ack(void) +static void jmr3927_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + /* Nothing to do here */ +} + +struct clock_event_device jmr3927_clock_event_device = { + .name = "MIPS", + .features = CLOCK_EVT_FEAT_PERIODIC, + .shift = 32, + .rating = 300, + .cpumask = CPU_MASK_CPU0, + .irq = JMR3927_IRQ_TICK, + .set_mode = jmr3927_set_mode, +}; + +static irqreturn_t jmr3927_timer_interrupt(int irq, void *dev_id) { + struct clock_event_device *cd = &jmr3927_clock_event_device; + jmr3927_tmrptr->tisr = 0; /* ack interrupt */ + + cd->event_handler(cd); + + return IRQ_HANDLED; } +static struct irqaction jmr3927_timer_irqaction = { + .handler = jmr3927_timer_interrupt, + .flags = IRQF_DISABLED | IRQF_PERCPU, + .name = "jmr3927-timer", +}; + void __init plat_time_init(void) { + struct clock_event_device *cd; + clocksource_mips.read = jmr3927_hpt_read; - mips_timer_ack = jmr3927_timer_ack; mips_hpt_frequency = JMR3927_TIMER_CLK; -} -void __init plat_timer_setup(struct irqaction *irq) -{ jmr3927_tmrptr->cpra = JMR3927_TIMER_CLK / HZ; jmr3927_tmrptr->itmr = TXx927_TMTITMR_TIIE | TXx927_TMTITMR_TZCE; jmr3927_tmrptr->ccdr = JMR3927_TIMER_CCD; jmr3927_tmrptr->tcr = TXx927_TMTCR_TCE | TXx927_TMTCR_CCDE | TXx927_TMTCR_TMODE_ITVL; - setup_irq(JMR3927_IRQ_TICK, irq); + cd = &jmr3927_clock_event_device; + /* Calculate the min / max delta */ + cd->mult = div_sc((unsigned long) JMR3927_IMCLK, NSEC_PER_SEC, 32); + cd->max_delta_ns = clockevent_delta2ns(0x7fffffff, cd); + cd->min_delta_ns = clockevent_delta2ns(0x300, cd); + clockevents_register_device(cd); + + setup_irq(JMR3927_IRQ_TICK, &jmr3927_timer_irqaction); } #define DO_WRITE_THROUGH |