diff options
Diffstat (limited to 'drivers/clocksource')
| -rw-r--r-- | drivers/clocksource/Kconfig | 6 | ||||
| -rw-r--r-- | drivers/clocksource/Makefile | 2 | ||||
| -rw-r--r-- | drivers/clocksource/bcm2835_timer.c | 6 | ||||
| -rw-r--r-- | drivers/clocksource/clksrc-of.c | 35 | ||||
| -rw-r--r-- | drivers/clocksource/cs5535-clockevt.c | 11 | ||||
| -rw-r--r-- | drivers/clocksource/dw_apb_timer_of.c | 6 | ||||
| -rw-r--r-- | drivers/clocksource/nomadik-mtu.c | 33 | ||||
| -rw-r--r-- | drivers/clocksource/sunxi_timer.c | 17 | ||||
| -rw-r--r-- | drivers/clocksource/tcb_clksrc.c | 7 | ||||
| -rw-r--r-- | drivers/clocksource/vt8500_timer.c | 179 |
10 files changed, 250 insertions, 52 deletions
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig index 7fdcbd3..7d978c1 100644 --- a/drivers/clocksource/Kconfig +++ b/drivers/clocksource/Kconfig @@ -1,3 +1,6 @@ +config CLKSRC_OF + bool + config CLKSRC_I8253 bool @@ -25,6 +28,9 @@ config ARMADA_370_XP_TIMER config SUNXI_TIMER bool +config VT8500_TIMER + bool + config CLKSRC_NOMADIK_MTU bool depends on (ARCH_NOMADIK || ARCH_U8500) diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile index f93453d..440449c 100644 --- a/drivers/clocksource/Makefile +++ b/drivers/clocksource/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_CLKSRC_OF) += clksrc-of.o obj-$(CONFIG_ATMEL_TCB_CLKSRC) += tcb_clksrc.o obj-$(CONFIG_X86_CYCLONE_TIMER) += cyclone.o obj-$(CONFIG_X86_PM_TIMER) += acpi_pm.o @@ -16,5 +17,6 @@ obj-$(CONFIG_CLKSRC_DBX500_PRCMU) += clksrc-dbx500-prcmu.o obj-$(CONFIG_ARMADA_370_XP_TIMER) += time-armada-370-xp.o obj-$(CONFIG_ARCH_BCM2835) += bcm2835_timer.o obj-$(CONFIG_SUNXI_TIMER) += sunxi_timer.o +obj-$(CONFIG_VT8500_TIMER) += vt8500_timer.o obj-$(CONFIG_CLKSRC_ARM_GENERIC) += arm_generic.o diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c index bc19f12..7f796d8f 100644 --- a/drivers/clocksource/bcm2835_timer.c +++ b/drivers/clocksource/bcm2835_timer.c @@ -101,7 +101,7 @@ static struct of_device_id bcm2835_time_match[] __initconst = { {} }; -static void __init bcm2835_time_init(void) +void __init bcm2835_timer_init(void) { struct device_node *node; void __iomem *base; @@ -155,7 +155,3 @@ static void __init bcm2835_time_init(void) pr_info("bcm2835: system timer (irq = %d)\n", irq); } - -struct sys_timer bcm2835_timer = { - .init = bcm2835_time_init, -}; diff --git a/drivers/clocksource/clksrc-of.c b/drivers/clocksource/clksrc-of.c new file mode 100644 index 0000000..bdabdaa --- /dev/null +++ b/drivers/clocksource/clksrc-of.c @@ -0,0 +1,35 @@ +/* + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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 <http://www.gnu.org/licenses/>. + */ + +#include <linux/init.h> +#include <linux/of.h> + +extern struct of_device_id __clksrc_of_table[]; + +static const struct of_device_id __clksrc_of_table_sentinel + __used __section(__clksrc_of_table_end); + +void __init clocksource_of_init(void) +{ + struct device_node *np; + const struct of_device_id *match; + void (*init_func)(void); + + for_each_matching_node_and_match(np, __clksrc_of_table, &match) { + init_func = match->data; + init_func(); + } +} diff --git a/drivers/clocksource/cs5535-clockevt.c b/drivers/clocksource/cs5535-clockevt.c index d927938..ea21048 100644 --- a/drivers/clocksource/cs5535-clockevt.c +++ b/drivers/clocksource/cs5535-clockevt.c @@ -100,7 +100,6 @@ static struct clock_event_device cs5535_clockevent = { .set_mode = mfgpt_set_mode, .set_next_event = mfgpt_next_event, .rating = 250, - .shift = 32 }; static irqreturn_t mfgpt_tick(int irq, void *dev_id) @@ -169,17 +168,11 @@ static int __init cs5535_mfgpt_init(void) cs5535_mfgpt_write(cs5535_event_clock, MFGPT_REG_SETUP, val); /* Set up the clock event */ - cs5535_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC, - cs5535_clockevent.shift); - cs5535_clockevent.min_delta_ns = clockevent_delta2ns(0xF, - &cs5535_clockevent); - cs5535_clockevent.max_delta_ns = clockevent_delta2ns(0xFFFE, - &cs5535_clockevent); - printk(KERN_INFO DRV_NAME ": Registering MFGPT timer as a clock event, using IRQ %d\n", timer_irq); - clockevents_register_device(&cs5535_clockevent); + clockevents_config_and_register(&cs5535_clockevent, MFGPT_HZ, + 0xF, 0xFFFE); return 0; diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c index f7dba5b..ab09ed3 100644 --- a/drivers/clocksource/dw_apb_timer_of.c +++ b/drivers/clocksource/dw_apb_timer_of.c @@ -107,7 +107,7 @@ static const struct of_device_id osctimer_ids[] __initconst = { {}, }; -static void __init timer_init(void) +void __init dw_apb_timer_init(void) { struct device_node *event_timer, *source_timer; @@ -125,7 +125,3 @@ static void __init timer_init(void) init_sched_clock(); } - -struct sys_timer dw_apb_timer = { - .init = timer_init, -}; diff --git a/drivers/clocksource/nomadik-mtu.c b/drivers/clocksource/nomadik-mtu.c index 8914c3c..025afc6 100644 --- a/drivers/clocksource/nomadik-mtu.c +++ b/drivers/clocksource/nomadik-mtu.c @@ -134,12 +134,32 @@ static void nmdk_clkevt_mode(enum clock_event_mode mode, } } +void nmdk_clksrc_reset(void) +{ + /* Disable */ + writel(0, mtu_base + MTU_CR(0)); + + /* ClockSource: configure load and background-load, and fire it up */ + writel(nmdk_cycle, mtu_base + MTU_LR(0)); + writel(nmdk_cycle, mtu_base + MTU_BGLR(0)); + + writel(clk_prescale | MTU_CRn_32BITS | MTU_CRn_ENA, + mtu_base + MTU_CR(0)); +} + +static void nmdk_clkevt_resume(struct clock_event_device *cedev) +{ + nmdk_clkevt_reset(); + nmdk_clksrc_reset(); +} + static struct clock_event_device nmdk_clkevt = { .name = "mtu_1", .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, .rating = 200, .set_mode = nmdk_clkevt_mode, .set_next_event = nmdk_clkevt_next, + .resume = nmdk_clkevt_resume, }; /* @@ -161,19 +181,6 @@ static struct irqaction nmdk_timer_irq = { .dev_id = &nmdk_clkevt, }; -void nmdk_clksrc_reset(void) -{ - /* Disable */ - writel(0, mtu_base + MTU_CR(0)); - - /* ClockSource: configure load and background-load, and fire it up */ - writel(nmdk_cycle, mtu_base + MTU_LR(0)); - writel(nmdk_cycle, mtu_base + MTU_BGLR(0)); - - writel(clk_prescale | MTU_CRn_32BITS | MTU_CRn_ENA, - mtu_base + MTU_CR(0)); -} - void __init nmdk_timer_init(void __iomem *base, int irq) { unsigned long rate; diff --git a/drivers/clocksource/sunxi_timer.c b/drivers/clocksource/sunxi_timer.c index 3cd1bd3..0ce85e2 100644 --- a/drivers/clocksource/sunxi_timer.c +++ b/drivers/clocksource/sunxi_timer.c @@ -74,7 +74,6 @@ static int sunxi_clkevt_next_event(unsigned long evt, static struct clock_event_device sunxi_clockevent = { .name = "sunxi_tick", - .shift = 32, .rating = 300, .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, .set_mode = sunxi_clkevt_mode, @@ -104,7 +103,7 @@ static struct of_device_id sunxi_timer_dt_ids[] = { { } }; -static void __init sunxi_timer_init(void) +void __init sunxi_timer_init(void) { struct device_node *node; unsigned long rate = 0; @@ -154,18 +153,8 @@ static void __init sunxi_timer_init(void) val = readl(timer_base + TIMER_CTL_REG); writel(val | TIMER_CTL_ENABLE, timer_base + TIMER_CTL_REG); - sunxi_clockevent.mult = div_sc(rate / TIMER_SCAL, - NSEC_PER_SEC, - sunxi_clockevent.shift); - sunxi_clockevent.max_delta_ns = clockevent_delta2ns(0xff, - &sunxi_clockevent); - sunxi_clockevent.min_delta_ns = clockevent_delta2ns(0x1, - &sunxi_clockevent); sunxi_clockevent.cpumask = cpumask_of(0); - clockevents_register_device(&sunxi_clockevent); + clockevents_config_and_register(&sunxi_clockevent, rate / TIMER_SCAL, + 0x1, 0xff); } - -struct sys_timer sunxi_timer = { - .init = sunxi_timer_init, -}; diff --git a/drivers/clocksource/tcb_clksrc.c b/drivers/clocksource/tcb_clksrc.c index 32cb929..8a61872 100644 --- a/drivers/clocksource/tcb_clksrc.c +++ b/drivers/clocksource/tcb_clksrc.c @@ -157,7 +157,6 @@ static struct tc_clkevt_device clkevt = { .name = "tc_clkevt", .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, - .shift = 32, /* Should be lower than at91rm9200's system timer */ .rating = 125, .set_next_event = tc_next_event, @@ -196,13 +195,9 @@ static void __init setup_clkevents(struct atmel_tc *tc, int clk32k_divisor_idx) timer_clock = clk32k_divisor_idx; - clkevt.clkevt.mult = div_sc(32768, NSEC_PER_SEC, clkevt.clkevt.shift); - clkevt.clkevt.max_delta_ns - = clockevent_delta2ns(0xffff, &clkevt.clkevt); - clkevt.clkevt.min_delta_ns = clockevent_delta2ns(1, &clkevt.clkevt) + 1; clkevt.clkevt.cpumask = cpumask_of(0); - clockevents_register_device(&clkevt.clkevt); + clockevents_config_and_register(&clkevt.clkevt, 32768, 1, 0xffff); setup_irq(irq, &tc_irqaction); } diff --git a/drivers/clocksource/vt8500_timer.c b/drivers/clocksource/vt8500_timer.c new file mode 100644 index 0000000..ed66cf0 --- /dev/null +++ b/drivers/clocksource/vt8500_timer.c @@ -0,0 +1,179 @@ +/* + * arch/arm/mach-vt8500/timer.c + * + * Copyright (C) 2012 Tony Prisk <linux@prisktech.co.nz> + * Copyright (C) 2010 Alexey Charkov <alchark@gmail.com> + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * This file is copied and modified from the original timer.c provided by + * Alexey Charkov. Minor changes have been made for Device Tree Support. + */ + +#include <linux/io.h> +#include <linux/irq.h> +#include <linux/interrupt.h> +#include <linux/clocksource.h> +#include <linux/clockchips.h> +#include <linux/delay.h> +#include <asm/mach/time.h> + +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> + +#define VT8500_TIMER_OFFSET 0x0100 +#define VT8500_TIMER_HZ 3000000 +#define TIMER_MATCH_VAL 0x0000 +#define TIMER_COUNT_VAL 0x0010 +#define TIMER_STATUS_VAL 0x0014 +#define TIMER_IER_VAL 0x001c /* interrupt enable */ +#define TIMER_CTRL_VAL 0x0020 +#define TIMER_AS_VAL 0x0024 /* access status */ +#define TIMER_COUNT_R_ACTIVE (1 << 5) /* not ready for read */ +#define TIMER_COUNT_W_ACTIVE (1 << 4) /* not ready for write */ +#define TIMER_MATCH_W_ACTIVE (1 << 0) /* not ready for write */ + +#define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t) + +static void __iomem *regbase; + +static cycle_t vt8500_timer_read(struct clocksource *cs) +{ + int loops = msecs_to_loops(10); + writel(3, regbase + TIMER_CTRL_VAL); + while ((readl((regbase + TIMER_AS_VAL)) & TIMER_COUNT_R_ACTIVE) + && --loops) + cpu_relax(); + return readl(regbase + TIMER_COUNT_VAL); +} + +static struct clocksource clocksource = { + .name = "vt8500_timer", + .rating = 200, + .read = vt8500_timer_read, + .mask = CLOCKSOURCE_MASK(32), + .flags = CLOCK_SOURCE_IS_CONTINUOUS, +}; + +static int vt8500_timer_set_next_event(unsigned long cycles, + struct clock_event_device *evt) +{ + int loops = msecs_to_loops(10); + cycle_t alarm = clocksource.read(&clocksource) + cycles; + while ((readl(regbase + TIMER_AS_VAL) & TIMER_MATCH_W_ACTIVE) + && --loops) + cpu_relax(); + writel((unsigned long)alarm, regbase + TIMER_MATCH_VAL); + + if ((signed)(alarm - clocksource.read(&clocksource)) <= 16) + return -ETIME; + + writel(1, regbase + TIMER_IER_VAL); + + return 0; +} + +static void vt8500_timer_set_mode(enum clock_event_mode mode, + struct clock_event_device *evt) +{ + switch (mode) { + case CLOCK_EVT_MODE_RESUME: + case CLOCK_EVT_MODE_PERIODIC: + break; + case CLOCK_EVT_MODE_ONESHOT: + case CLOCK_EVT_MODE_UNUSED: + case CLOCK_EVT_MODE_SHUTDOWN: + writel(readl(regbase + TIMER_CTRL_VAL) | 1, + regbase + TIMER_CTRL_VAL); + writel(0, regbase + TIMER_IER_VAL); + break; + } +} + +static struct clock_event_device clockevent = { + .name = "vt8500_timer", + .features = CLOCK_EVT_FEAT_ONESHOT, + .rating = 200, + .set_next_event = vt8500_timer_set_next_event, + .set_mode = vt8500_timer_set_mode, +}; + +static irqreturn_t vt8500_timer_interrupt(int irq, void *dev_id) +{ + struct clock_event_device *evt = dev_id; + writel(0xf, regbase + TIMER_STATUS_VAL); + evt->event_handler(evt); + + return IRQ_HANDLED; +} + +static struct irqaction irq = { + .name = "vt8500_timer", + .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, + .handler = vt8500_timer_interrupt, + .dev_id = &clockevent, +}; + +static struct of_device_id vt8500_timer_ids[] = { + { .compatible = "via,vt8500-timer" }, + { } +}; + +void __init vt8500_timer_init(void) +{ + struct device_node *np; + int timer_irq; + + np = of_find_matching_node(NULL, vt8500_timer_ids); + if (!np) { + pr_err("%s: Timer description missing from Device Tree\n", + __func__); + return; + } + regbase = of_iomap(np, 0); + if (!regbase) { + pr_err("%s: Missing iobase description in Device Tree\n", + __func__); + of_node_put(np); + return; + } + timer_irq = irq_of_parse_and_map(np, 0); + if (!timer_irq) { + pr_err("%s: Missing irq description in Device Tree\n", + __func__); + of_node_put(np); + return; + } + + writel(1, regbase + TIMER_CTRL_VAL); + writel(0xf, regbase + TIMER_STATUS_VAL); + writel(~0, regbase + TIMER_MATCH_VAL); + + if (clocksource_register_hz(&clocksource, VT8500_TIMER_HZ)) + pr_err("%s: vt8500_timer_init: clocksource_register failed for %s\n", + __func__, clocksource.name); + + clockevent.cpumask = cpumask_of(0); + + if (setup_irq(timer_irq, &irq)) + pr_err("%s: setup_irq failed for %s\n", __func__, + clockevent.name); + clockevents_config_and_register(&clockevent, VT8500_TIMER_HZ, + 4, 0xf0000000); +} + |