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Diffstat (limited to 'cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-omap2/timer-gp.c')
-rw-r--r--cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-omap2/timer-gp.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-omap2/timer-gp.c b/cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-omap2/timer-gp.c
new file mode 100644
index 0000000000..3234deedb9
--- /dev/null
+++ b/cleopatre/linux-2.6.25.10-spc300/arch/arm/mach-omap2/timer-gp.c
@@ -0,0 +1,73 @@
+/*
+ * linux/arch/arm/mach-omap2/timer-gp.c
+ *
+ * OMAP2 GP timer support.
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * Author: Paul Mundt <paul.mundt@nokia.com>
+ * Juha Yrjölä <juha.yrjola@nokia.com>
+ * OMAP Dual-mode timer framework support by Timo Teras
+ *
+ * Some parts based off of TI's 24xx code:
+ *
+ * Copyright (C) 2004 Texas Instruments, Inc.
+ *
+ * Roughly modelled after the OMAP1 MPU timer code.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/init.h>
+#include <linux/time.h>
+#include <linux/interrupt.h>
+#include <linux/err.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+
+#include <asm/mach/time.h>
+#include <asm/arch/dmtimer.h>
+
+static struct omap_dm_timer *gptimer;
+
+static inline void omap2_gp_timer_start(unsigned long load_val)
+{
+ omap_dm_timer_set_load(gptimer, 1, 0xffffffff - load_val);
+ omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
+ omap_dm_timer_start(gptimer);
+}
+
+static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
+{
+ omap_dm_timer_write_status(gptimer, OMAP_TIMER_INT_OVERFLOW);
+ timer_tick();
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction omap2_gp_timer_irq = {
+ .name = "gp timer",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = omap2_gp_timer_interrupt,
+};
+
+static void __init omap2_gp_timer_init(void)
+{
+ u32 tick_period;
+
+ omap_dm_timer_init();
+ gptimer = omap_dm_timer_request_specific(1);
+ BUG_ON(gptimer == NULL);
+
+ omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK);
+ tick_period = clk_get_rate(omap_dm_timer_get_fclk(gptimer)) / HZ;
+ tick_period -= 1;
+
+ setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
+ omap2_gp_timer_start(tick_period);
+}
+
+struct sys_timer omap_timer = {
+ .init = omap2_gp_timer_init,
+};