summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--arch/arm/mach-omap2/board-omap3beagle.c4
-rw-r--r--arch/arm/mach-omap2/clock24xx.c1
-rw-r--r--arch/arm/mach-omap2/clock24xx.h10
-rw-r--r--arch/arm/mach-omap2/clock34xx.h1
-rw-r--r--arch/arm/mach-omap2/timer-gp.c48
-rw-r--r--arch/arm/plat-omap/dmtimer.c20
-rw-r--r--arch/arm/plat-omap/include/mach/dmtimer.h2
-rw-r--r--arch/arm/plat-omap/include/mach/timer-gp.h17
8 files changed, 91 insertions, 12 deletions
diff --git a/arch/arm/mach-omap2/board-omap3beagle.c b/arch/arm/mach-omap2/board-omap3beagle.c
index 744740ae1b9..3a7a29d1f9a 100644
--- a/arch/arm/mach-omap2/board-omap3beagle.c
+++ b/arch/arm/mach-omap2/board-omap3beagle.c
@@ -42,6 +42,7 @@
#include <mach/nand.h>
#include <mach/mux.h>
#include <mach/usb.h>
+#include <mach/timer-gp.h>
#include "mmc-twl4030.h"
@@ -186,6 +187,9 @@ static void __init omap3_beagle_init_irq(void)
{
omap2_init_common_hw(NULL);
omap_init_irq();
+#ifdef CONFIG_OMAP_32K_TIMER
+ omap2_gp_clockevent_set_gptimer(12);
+#endif
omap_gpio_init();
}
diff --git a/arch/arm/mach-omap2/clock24xx.c b/arch/arm/mach-omap2/clock24xx.c
index 5ea418327e8..efc59c49341 100644
--- a/arch/arm/mach-omap2/clock24xx.c
+++ b/arch/arm/mach-omap2/clock24xx.c
@@ -66,6 +66,7 @@ struct omap_clk {
static struct omap_clk omap24xx_clks[] = {
/* external root sources */
CLK(NULL, "func_32k_ck", &func_32k_ck, CK_243X | CK_242X),
+ CLK(NULL, "secure_32k_ck", &secure_32k_ck, CK_243X | CK_242X),
CLK(NULL, "osc_ck", &osc_ck, CK_243X | CK_242X),
CLK(NULL, "sys_ck", &sys_ck, CK_243X | CK_242X),
CLK(NULL, "alt_ck", &alt_ck, CK_243X | CK_242X),
diff --git a/arch/arm/mach-omap2/clock24xx.h b/arch/arm/mach-omap2/clock24xx.h
index 33c3e5b1432..88c5acb40fc 100644
--- a/arch/arm/mach-omap2/clock24xx.h
+++ b/arch/arm/mach-omap2/clock24xx.h
@@ -625,6 +625,14 @@ static struct clk func_32k_ck = {
.clkdm_name = "wkup_clkdm",
};
+static struct clk secure_32k_ck = {
+ .name = "secure_32k_ck",
+ .ops = &clkops_null,
+ .rate = 32768,
+ .flags = RATE_FIXED,
+ .clkdm_name = "wkup_clkdm",
+};
+
/* Typical 12/13MHz in standalone mode, will be 26Mhz in chassis mode */
static struct clk osc_ck = { /* (*12, *13, 19.2, *26, 38.4)MHz */
.name = "osc_ck",
@@ -1790,7 +1798,7 @@ static struct clk gpt12_ick = {
static struct clk gpt12_fck = {
.name = "gpt12_fck",
.ops = &clkops_omap2_dflt_wait,
- .parent = &func_32k_ck,
+ .parent = &secure_32k_ck,
.clkdm_name = "core_l4_clkdm",
.enable_reg = OMAP_CM_REGADDR(CORE_MOD, CM_FCLKEN1),
.enable_bit = OMAP24XX_EN_GPT12_SHIFT,
diff --git a/arch/arm/mach-omap2/clock34xx.h b/arch/arm/mach-omap2/clock34xx.h
index f0090175d59..6763b8f7302 100644
--- a/arch/arm/mach-omap2/clock34xx.h
+++ b/arch/arm/mach-omap2/clock34xx.h
@@ -2901,7 +2901,6 @@ static struct clk sr_l4_ick = {
/* SECURE_32K_FCK clocks */
-/* XXX This clock no longer exists in 3430 TRM rev F */
static struct clk gpt12_fck = {
.name = "gpt12_fck",
.ops = &clkops_null,
diff --git a/arch/arm/mach-omap2/timer-gp.c b/arch/arm/mach-omap2/timer-gp.c
index 9fc13a2cc3f..7835048041e 100644
--- a/arch/arm/mach-omap2/timer-gp.c
+++ b/arch/arm/mach-omap2/timer-gp.c
@@ -3,6 +3,8 @@
*
* OMAP2 GP timer support.
*
+ * Copyright (C) 2009 Nokia Corporation
+ *
* Update to use new clocksource/clockevent layers
* Author: Kevin Hilman, MontaVista Software, Inc. <source@mvista.com>
* Copyright (C) 2007 MontaVista Software, Inc.
@@ -36,8 +38,13 @@
#include <asm/mach/time.h>
#include <mach/dmtimer.h>
+/* MAX_GPTIMER_ID: number of GPTIMERs on the chip */
+#define MAX_GPTIMER_ID 12
+
static struct omap_dm_timer *gptimer;
static struct clock_event_device clockevent_gpt;
+static u8 __initdata gptimer_id = 1;
+static u8 __initdata inited;
static irqreturn_t omap2_gp_timer_interrupt(int irq, void *dev_id)
{
@@ -95,20 +102,53 @@ static struct clock_event_device clockevent_gpt = {
.set_mode = omap2_gp_timer_set_mode,
};
+/**
+ * omap2_gp_clockevent_set_gptimer - set which GPTIMER is used for clockevents
+ * @id: GPTIMER to use (1..MAX_GPTIMER_ID)
+ *
+ * Define the GPTIMER that the system should use for the tick timer.
+ * Meant to be called from board-*.c files in the event that GPTIMER1, the
+ * default, is unsuitable. Returns -EINVAL on error or 0 on success.
+ */
+int __init omap2_gp_clockevent_set_gptimer(u8 id)
+{
+ if (id < 1 || id > MAX_GPTIMER_ID)
+ return -EINVAL;
+
+ BUG_ON(inited);
+
+ gptimer_id = id;
+
+ return 0;
+}
+
static void __init omap2_gp_clockevent_init(void)
{
u32 tick_rate;
+ int src;
+
+ inited = 1;
- gptimer = omap_dm_timer_request_specific(1);
+ gptimer = omap_dm_timer_request_specific(gptimer_id);
BUG_ON(gptimer == NULL);
#if defined(CONFIG_OMAP_32K_TIMER)
- omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_32_KHZ);
+ src = OMAP_TIMER_SRC_32_KHZ;
#else
- omap_dm_timer_set_source(gptimer, OMAP_TIMER_SRC_SYS_CLK);
+ src = OMAP_TIMER_SRC_SYS_CLK;
+ WARN(gptimer_id == 12, "WARNING: GPTIMER12 can only use the "
+ "secure 32KiHz clock source\n");
#endif
+
+ if (gptimer_id != 12)
+ WARN(IS_ERR_VALUE(omap_dm_timer_set_source(gptimer, src)),
+ "timer-gp: omap_dm_timer_set_source() failed\n");
+
tick_rate = clk_get_rate(omap_dm_timer_get_fclk(gptimer));
+ pr_info("OMAP clockevent source: GPTIMER%d at %u Hz\n",
+ gptimer_id, tick_rate);
+
omap2_gp_timer_irq.dev_id = (void *)gptimer;
setup_irq(omap_dm_timer_get_irq(gptimer), &omap2_gp_timer_irq);
omap_dm_timer_set_int_enable(gptimer, OMAP_TIMER_INT_OVERFLOW);
@@ -125,6 +165,8 @@ static void __init omap2_gp_clockevent_init(void)
clockevents_register_device(&clockevent_gpt);
}
+/* Clocksource code */
+
#ifdef CONFIG_OMAP_32K_TIMER
/*
* When 32k-timer is enabled, don't use GPTimer for clocksource
diff --git a/arch/arm/plat-omap/dmtimer.c b/arch/arm/plat-omap/dmtimer.c
index a05205c12f7..55bb9963129 100644
--- a/arch/arm/plat-omap/dmtimer.c
+++ b/arch/arm/plat-omap/dmtimer.c
@@ -509,7 +509,7 @@ EXPORT_SYMBOL_GPL(omap_dm_timer_stop);
#ifdef CONFIG_ARCH_OMAP1
-void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
int n = (timer - dm_timers) << 1;
u32 l;
@@ -517,23 +517,31 @@ void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
l = omap_readl(MOD_CONF_CTRL_1) & ~(0x03 << n);
l |= source << n;
omap_writel(l, MOD_CONF_CTRL_1);
+
+ return 0;
}
EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
#else
-void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
{
+ int ret = -EINVAL;
+
if (source < 0 || source >= 3)
- return;
+ return -EINVAL;
clk_disable(timer->fclk);
- clk_set_parent(timer->fclk, dm_source_clocks[source]);
+ ret = clk_set_parent(timer->fclk, dm_source_clocks[source]);
clk_enable(timer->fclk);
- /* When the functional clock disappears, too quick writes seem to
- * cause an abort. */
+ /*
+ * When the functional clock disappears, too quick writes seem
+ * to cause an abort. XXX Is this still necessary?
+ */
__delay(150000);
+
+ return ret;
}
EXPORT_SYMBOL_GPL(omap_dm_timer_set_source);
diff --git a/arch/arm/plat-omap/include/mach/dmtimer.h b/arch/arm/plat-omap/include/mach/dmtimer.h
index 6dc70313821..20f1054c0a8 100644
--- a/arch/arm/plat-omap/include/mach/dmtimer.h
+++ b/arch/arm/plat-omap/include/mach/dmtimer.h
@@ -64,7 +64,7 @@ void omap_dm_timer_trigger(struct omap_dm_timer *timer);
void omap_dm_timer_start(struct omap_dm_timer *timer);
void omap_dm_timer_stop(struct omap_dm_timer *timer);
-void omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);
+int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source);
void omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload, unsigned int value);
void omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload, unsigned int value);
void omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable, unsigned int match);
diff --git a/arch/arm/plat-omap/include/mach/timer-gp.h b/arch/arm/plat-omap/include/mach/timer-gp.h
new file mode 100644
index 00000000000..c88d346b59d
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/timer-gp.h
@@ -0,0 +1,17 @@
+/*
+ * OMAP2/3 GPTIMER support.headers
+ *
+ * Copyright (C) 2009 Nokia Corporation
+ *
+ * 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.
+ */
+
+#ifndef __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_TIMER_GP_H
+#define __ARCH_ARM_PLAT_OMAP_INCLUDE_MACH_TIMER_GP_H
+
+int __init omap2_gp_clockevent_set_gptimer(u8 id);
+
+#endif
+
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-29 17:21:06 +0000