diff options
Diffstat (limited to 'target/linux/xburst/patches-2.6.35/006-clocksource.patch')
| -rw-r--r-- | target/linux/xburst/patches-2.6.35/006-clocksource.patch | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/target/linux/xburst/patches-2.6.35/006-clocksource.patch b/target/linux/xburst/patches-2.6.35/006-clocksource.patch deleted file mode 100644 index dfb31c1..0000000 --- a/target/linux/xburst/patches-2.6.35/006-clocksource.patch +++ /dev/null @@ -1,165 +0,0 @@ -From ebf176a38105200dca51a96ad1535c8d56235653 Mon Sep 17 00:00:00 2001 -From: Lars-Peter Clausen <lars@metafoo.de> -Date: Sat, 19 Jun 2010 04:08:10 +0000 -Subject: [PATCH] MIPS: JZ4740: Add clocksource/clockevent support. - -Add clocksource and clockevent support for the timer/counter unit on -JZ4740 SoCs. - -Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> -Cc: linux-mips@linux-mips.org -Cc: linux-kernel@vger.kernel.org -Patchwork: https://patchwork.linux-mips.org/patch/1397/ -Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---- - arch/mips/jz4740/time.c | 144 +++++++++++++++++++++++++++++++++++++++++++++++ - 1 files changed, 144 insertions(+), 0 deletions(-) - create mode 100644 arch/mips/jz4740/time.c - ---- /dev/null -+++ b/arch/mips/jz4740/time.c -@@ -0,0 +1,144 @@ -+/* -+ * Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de> -+ * JZ4740 platform time support -+ * -+ * 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. -+ * -+ * 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., -+ * 675 Mass Ave, Cambridge, MA 02139, USA. -+ * -+ */ -+ -+#include <linux/interrupt.h> -+#include <linux/kernel.h> -+#include <linux/time.h> -+ -+#include <linux/clockchips.h> -+ -+#include <asm/mach-jz4740/irq.h> -+#include <asm/time.h> -+ -+#include "clock.h" -+#include "timer.h" -+ -+#define TIMER_CLOCKEVENT 0 -+#define TIMER_CLOCKSOURCE 1 -+ -+static uint16_t jz4740_jiffies_per_tick; -+ -+static cycle_t jz4740_clocksource_read(struct clocksource *cs) -+{ -+ return jz4740_timer_get_count(TIMER_CLOCKSOURCE); -+} -+ -+static struct clocksource jz4740_clocksource = { -+ .name = "jz4740-timer", -+ .rating = 200, -+ .read = jz4740_clocksource_read, -+ .mask = CLOCKSOURCE_MASK(16), -+ .flags = CLOCK_SOURCE_IS_CONTINUOUS, -+}; -+ -+static irqreturn_t jz4740_clockevent_irq(int irq, void *devid) -+{ -+ struct clock_event_device *cd = devid; -+ -+ jz4740_timer_ack_full(TIMER_CLOCKEVENT); -+ -+ if (cd->mode != CLOCK_EVT_MODE_PERIODIC) -+ jz4740_timer_disable(TIMER_CLOCKEVENT); -+ -+ cd->event_handler(cd); -+ -+ return IRQ_HANDLED; -+} -+ -+static void jz4740_clockevent_set_mode(enum clock_event_mode mode, -+ struct clock_event_device *cd) -+{ -+ switch (mode) { -+ case CLOCK_EVT_MODE_PERIODIC: -+ jz4740_timer_set_count(TIMER_CLOCKEVENT, 0); -+ jz4740_timer_set_period(TIMER_CLOCKEVENT, jz4740_jiffies_per_tick); -+ case CLOCK_EVT_MODE_RESUME: -+ jz4740_timer_irq_full_enable(TIMER_CLOCKEVENT); -+ jz4740_timer_enable(TIMER_CLOCKEVENT); -+ break; -+ case CLOCK_EVT_MODE_ONESHOT: -+ case CLOCK_EVT_MODE_SHUTDOWN: -+ jz4740_timer_disable(TIMER_CLOCKEVENT); -+ break; -+ default: -+ break; -+ } -+} -+ -+static int jz4740_clockevent_set_next(unsigned long evt, -+ struct clock_event_device *cd) -+{ -+ jz4740_timer_set_count(TIMER_CLOCKEVENT, 0); -+ jz4740_timer_set_period(TIMER_CLOCKEVENT, evt); -+ jz4740_timer_enable(TIMER_CLOCKEVENT); -+ -+ return 0; -+} -+ -+static struct clock_event_device jz4740_clockevent = { -+ .name = "jz4740-timer", -+ .features = CLOCK_EVT_FEAT_PERIODIC, -+ .set_next_event = jz4740_clockevent_set_next, -+ .set_mode = jz4740_clockevent_set_mode, -+ .rating = 200, -+ .irq = JZ4740_IRQ_TCU0, -+}; -+ -+static struct irqaction timer_irqaction = { -+ .handler = jz4740_clockevent_irq, -+ .flags = IRQF_PERCPU | IRQF_TIMER, -+ .name = "jz4740-timerirq", -+ .dev_id = &jz4740_clockevent, -+}; -+ -+void __init plat_time_init(void) -+{ -+ int ret; -+ uint32_t clk_rate; -+ uint16_t ctrl; -+ -+ jz4740_timer_init(); -+ -+ clk_rate = jz4740_clock_bdata.ext_rate >> 4; -+ jz4740_jiffies_per_tick = DIV_ROUND_CLOSEST(clk_rate, HZ); -+ -+ clockevent_set_clock(&jz4740_clockevent, clk_rate); -+ jz4740_clockevent.min_delta_ns = clockevent_delta2ns(100, &jz4740_clockevent); -+ jz4740_clockevent.max_delta_ns = clockevent_delta2ns(0xffff, &jz4740_clockevent); -+ jz4740_clockevent.cpumask = cpumask_of(0); -+ -+ clockevents_register_device(&jz4740_clockevent); -+ -+ clocksource_set_clock(&jz4740_clocksource, clk_rate); -+ ret = clocksource_register(&jz4740_clocksource); -+ -+ if (ret) -+ printk(KERN_ERR "Failed to register clocksource: %d\n", ret); -+ -+ setup_irq(JZ4740_IRQ_TCU0, &timer_irqaction); -+ -+ ctrl = JZ_TIMER_CTRL_PRESCALE_16 | JZ_TIMER_CTRL_SRC_EXT; -+ -+ jz4740_timer_set_ctrl(TIMER_CLOCKEVENT, ctrl); -+ jz4740_timer_set_ctrl(TIMER_CLOCKSOURCE, ctrl); -+ -+ jz4740_timer_set_period(TIMER_CLOCKEVENT, jz4740_jiffies_per_tick); -+ jz4740_timer_irq_full_enable(TIMER_CLOCKEVENT); -+ -+ jz4740_timer_set_period(TIMER_CLOCKSOURCE, 0xffff); -+ -+ jz4740_timer_enable(TIMER_CLOCKEVENT); -+ jz4740_timer_enable(TIMER_CLOCKSOURCE); -+} |