[PATCH v4 04/12] ARM: Exynos: Rework timer initialization sequence
Thomas Abraham
thomas.abraham at linaro.org
Sat Nov 24 16:17:57 EST 2012
A seperate timer initialization function for all exynos based platforms is
created. This new initialization function will help to identify the type of
timer used and call their corresponding initialization function. Since the
clock initialization should be completed prior to the mct timer initialization,
the clock initialization can be initiated from this new timer initialization
function.
Signed-off-by: Thomas Abraham <thomas.abraham at linaro.org>
---
arch/arm/mach-exynos/common.c | 27 +++++++++++++++++++++++++++
arch/arm/mach-exynos/common.h | 3 ++-
arch/arm/mach-exynos/mach-armlex4210.c | 2 +-
arch/arm/mach-exynos/mach-exynos4-dt.c | 2 +-
arch/arm/mach-exynos/mach-exynos5-dt.c | 2 +-
arch/arm/mach-exynos/mach-nuri.c | 2 +-
arch/arm/mach-exynos/mach-origen.c | 2 +-
arch/arm/mach-exynos/mach-smdk4x12.c | 4 ++--
arch/arm/mach-exynos/mach-smdkv310.c | 4 ++--
arch/arm/mach-exynos/mct.c | 13 +------------
10 files changed, 39 insertions(+), 22 deletions(-)
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index 8fafac5..f814600 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -23,6 +23,8 @@
#include <linux/irqdomain.h>
#include <linux/of_address.h>
+#include <asm/mach/time.h>
+#include <asm/arch_timer.h>
#include <asm/proc-fns.h>
#include <asm/exception.h>
#include <asm/hardware/cache-l2x0.h>
@@ -415,6 +417,31 @@ static void __init exynos5_init_clocks(int xtal)
exynos5_setup_clocks();
}
+void __init exynos_timer_init(void)
+{
+ /*
+ * Temporary support for Exynos4 based non-dt platforms. This should
+ * go away soon.
+ */
+ if (!of_have_populated_dt() && (soc_is_exynos4210() ||
+ soc_is_exynos4212() || soc_is_exynos4412())) {
+ exynos_mct_init();
+ return;
+ }
+
+ /* quick check to see if this machine uses arch timer */
+ if (of_machine_is_compatible("samsung,exynos5440")) {
+ if (arch_timer_of_register())
+ panic("%s: could not initialize timer\n", __func__);
+ } else {
+ exynos_mct_init();
+ }
+}
+
+struct sys_timer exynos_timer = {
+ .init = exynos_timer_init,
+};
+
#define COMBINER_ENABLE_SET 0x0
#define COMBINER_ENABLE_CLEAR 0x4
#define COMBINER_INT_STATUS 0xC
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index dac146d..eafcb5d 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -12,7 +12,7 @@
#ifndef __ARCH_ARM_MACH_EXYNOS_COMMON_H
#define __ARCH_ARM_MACH_EXYNOS_COMMON_H
-extern struct sys_timer exynos4_timer;
+extern struct sys_timer exynos_timer;
struct map_desc;
void exynos_init_io(struct map_desc *mach_desc, int size);
@@ -21,6 +21,7 @@ void exynos5_init_irq(void);
void exynos4_restart(char mode, const char *cmd);
void exynos5_restart(char mode, const char *cmd);
void exynos_init_late(void);
+extern void exynos_mct_init(void);
#ifdef CONFIG_PM_GENERIC_DOMAINS
int exynos_pm_late_initcall(void);
diff --git a/arch/arm/mach-exynos/mach-armlex4210.c b/arch/arm/mach-exynos/mach-armlex4210.c
index 3f37a5e..68b4bb4 100644
--- a/arch/arm/mach-exynos/mach-armlex4210.c
+++ b/arch/arm/mach-exynos/mach-armlex4210.c
@@ -205,6 +205,6 @@ MACHINE_START(ARMLEX4210, "ARMLEX4210")
.handle_irq = gic_handle_irq,
.init_machine = armlex4210_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.restart = exynos4_restart,
MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-exynos4-dt.c b/arch/arm/mach-exynos/mach-exynos4-dt.c
index 8858068..dcf5b30 100644
--- a/arch/arm/mach-exynos/mach-exynos4-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos4-dt.c
@@ -109,7 +109,7 @@ DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
.handle_irq = gic_handle_irq,
.init_machine = exynos4_dt_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.dt_compat = exynos4_dt_compat,
.restart = exynos4_restart,
MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c
index 845d8e2..c546287 100644
--- a/arch/arm/mach-exynos/mach-exynos5-dt.c
+++ b/arch/arm/mach-exynos/mach-exynos5-dt.c
@@ -178,7 +178,7 @@ DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
.handle_irq = gic_handle_irq,
.init_machine = exynos5_dt_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.dt_compat = exynos5_dt_compat,
.restart = exynos5_restart,
.reserve = exynos5_reserve,
diff --git a/arch/arm/mach-exynos/mach-nuri.c b/arch/arm/mach-exynos/mach-nuri.c
index 27d4ed8..03d5ddf 100644
--- a/arch/arm/mach-exynos/mach-nuri.c
+++ b/arch/arm/mach-exynos/mach-nuri.c
@@ -1382,7 +1382,7 @@ MACHINE_START(NURI, "NURI")
.handle_irq = gic_handle_irq,
.init_machine = nuri_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.reserve = &nuri_reserve,
.restart = exynos4_restart,
MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-origen.c b/arch/arm/mach-exynos/mach-origen.c
index e6f4191..c5ee414 100644
--- a/arch/arm/mach-exynos/mach-origen.c
+++ b/arch/arm/mach-exynos/mach-origen.c
@@ -817,7 +817,7 @@ MACHINE_START(ORIGEN, "ORIGEN")
.handle_irq = gic_handle_irq,
.init_machine = origen_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.reserve = &origen_reserve,
.restart = exynos4_restart,
MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-smdk4x12.c b/arch/arm/mach-exynos/mach-smdk4x12.c
index a1555a7..03f133a 100644
--- a/arch/arm/mach-exynos/mach-smdk4x12.c
+++ b/arch/arm/mach-exynos/mach-smdk4x12.c
@@ -378,7 +378,7 @@ MACHINE_START(SMDK4212, "SMDK4212")
.map_io = smdk4x12_map_io,
.handle_irq = gic_handle_irq,
.init_machine = smdk4x12_machine_init,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.restart = exynos4_restart,
.reserve = &smdk4x12_reserve,
MACHINE_END
@@ -393,7 +393,7 @@ MACHINE_START(SMDK4412, "SMDK4412")
.handle_irq = gic_handle_irq,
.init_machine = smdk4x12_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.restart = exynos4_restart,
.reserve = &smdk4x12_reserve,
MACHINE_END
diff --git a/arch/arm/mach-exynos/mach-smdkv310.c b/arch/arm/mach-exynos/mach-smdkv310.c
index 063cb94..f99cc71 100644
--- a/arch/arm/mach-exynos/mach-smdkv310.c
+++ b/arch/arm/mach-exynos/mach-smdkv310.c
@@ -426,7 +426,7 @@ MACHINE_START(SMDKV310, "SMDKV310")
.map_io = smdkv310_map_io,
.handle_irq = gic_handle_irq,
.init_machine = smdkv310_machine_init,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.reserve = &smdkv310_reserve,
.restart = exynos4_restart,
MACHINE_END
@@ -440,7 +440,7 @@ MACHINE_START(SMDKC210, "SMDKC210")
.handle_irq = gic_handle_irq,
.init_machine = smdkv310_machine_init,
.init_late = exynos_init_late,
- .timer = &exynos4_timer,
+ .timer = &exynos_timer,
.reserve = &smdkv310_reserve,
.restart = exynos4_restart,
MACHINE_END
diff --git a/arch/arm/mach-exynos/mct.c b/arch/arm/mach-exynos/mct.c
index bf359f6..448ce86 100644
--- a/arch/arm/mach-exynos/mct.c
+++ b/arch/arm/mach-exynos/mct.c
@@ -23,7 +23,6 @@
#include <linux/of_irq.h>
#include <linux/of_address.h>
-#include <asm/arch_timer.h>
#include <asm/hardware/gic.h>
#include <asm/localtimer.h>
@@ -31,7 +30,6 @@
#include <mach/map.h>
#include <mach/irqs.h>
-#include <asm/mach/time.h>
#define EXYNOS4_MCTREG(x) (x)
#define EXYNOS4_MCT_G_CNT_L EXYNOS4_MCTREG(0x100)
@@ -513,16 +511,11 @@ static void __init exynos4_timer_resources(struct device_node *np)
#endif /* CONFIG_LOCAL_TIMERS */
}
-static void __init exynos_timer_init(void)
+void __init exynos_mct_init(void)
{
struct device_node *np;
u32 nr_irqs, i;
- if (soc_is_exynos5440()) {
- arch_timer_of_register();
- return;
- }
-
np = of_find_compatible_node(NULL, NULL, "samsung,exynos4210-mct");
if (np) {
if (of_machine_is_compatible("samsung,exynos4210") ||
@@ -551,7 +544,3 @@ static void __init exynos_timer_init(void)
exynos4_clocksource_init();
exynos4_clockevent_init();
}
-
-struct sys_timer exynos4_timer = {
- .init = exynos_timer_init,
-};
--
1.7.4.4
More information about the linux-arm-kernel
mailing list