This patch removes static platform-specific defines from samsung-time
implementation and introduces an interface to configure
platform-specific timer parameters from platform code.
Signed-off-by: Tomasz Figa <tomasz.f...@gmail.com>
---
arch/arm/mach-exynos/mach-universal_c210.c | 7 ++++
arch/arm/mach-s3c24xx/common.c | 9 +++++
arch/arm/mach-s3c64xx/common.c | 9 +++++
arch/arm/mach-s5p64x0/common.c | 9 +++++
arch/arm/mach-s5pc100/common.c | 9 +++++
arch/arm/mach-s5pv210/common.c | 9 +++++
arch/arm/plat-samsung/include/plat/samsung-time.h | 28 ++++++++-------
drivers/clocksource/samsung-time.c | 42 ++++++++++++++++++-----
8 files changed, 101 insertions(+), 21 deletions(-)
diff --git a/arch/arm/mach-exynos/mach-universal_c210.c
b/arch/arm/mach-exynos/mach-universal_c210.c
index 72f08fd..00554fe 100644
--- a/arch/arm/mach-exynos/mach-universal_c210.c
+++ b/arch/arm/mach-exynos/mach-universal_c210.c
@@ -1089,10 +1089,17 @@ static struct platform_device *universal_devices[]
__initdata = {
&s5p_device_fimc_md,
};
+static const struct samsung_timer_variant universal_timer_variant = {
+ .bits = 32,
+ .prescale = 2,
+ .divisor = 1,
+};
+
static void __init universal_map_io(void)
{
exynos_init_io(NULL, 0);
s3c24xx_init_uarts(universal_uartcfgs, ARRAY_SIZE(universal_uartcfgs));
+ samsung_timer_set_variant(&universal_timer_variant);
samsung_set_timer_source(SAMSUNG_PWM2, SAMSUNG_PWM4);
xxti_f = 0;
xusbxti_f = 24000000;
diff --git a/arch/arm/mach-s3c24xx/common.c b/arch/arm/mach-s3c24xx/common.c
index d97533d..816428f 100644
--- a/arch/arm/mach-s3c24xx/common.c
+++ b/arch/arm/mach-s3c24xx/common.c
@@ -49,6 +49,7 @@
#include <plat/clock.h>
#include <plat/cpu-freq.h>
#include <plat/pll.h>
+#include <plat/samsung-time.h>
#include "common.h"
@@ -216,6 +217,12 @@ static void s3c24xx_default_idle(void)
S3C2410_CLKCON);
}
+static const struct samsung_timer_variant s3c24xx_timer_variant = {
+ .bits = 16,
+ .prescale = 25,
+ .divisor = 2,
+};
+
void __init s3c24xx_init_io(struct map_desc *mach_desc, int size)
{
arm_pm_idle = s3c24xx_default_idle;
@@ -232,6 +239,8 @@ void __init s3c24xx_init_io(struct map_desc *mach_desc, int
size)
s3c24xx_init_cpu();
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+
+ samsung_timer_set_variant(&s3c24xx_timer_variant);
}
/* Serial port registrations */
diff --git a/arch/arm/mach-s3c64xx/common.c b/arch/arm/mach-s3c64xx/common.c
index 0b9c0ba..b6aa36d 100644
--- a/arch/arm/mach-s3c64xx/common.c
+++ b/arch/arm/mach-s3c64xx/common.c
@@ -44,6 +44,7 @@
#include <plat/irq-vic-timer.h>
#include <plat/regs-irqtype.h>
#include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
#include <plat/watchdog-reset.h>
#include "common.h"
@@ -148,6 +149,12 @@ static struct device s3c64xx_dev = {
.bus = &s3c64xx_subsys,
};
+static const struct samsung_timer_variant s3c64xx_timer_variant = {
+ .bits = 32,
+ .prescale = 2,
+ .divisor = 1,
+};
+
/* read cpu identification code */
void __init s3c64xx_init_io(struct map_desc *mach_desc, int size)
@@ -160,6 +167,8 @@ void __init s3c64xx_init_io(struct map_desc *mach_desc, int
size)
s3c64xx_init_cpu();
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+
+ samsung_timer_set_variant(&s3c64xx_timer_variant);
}
static __init int s3c64xx_dev_init(void)
diff --git a/arch/arm/mach-s5p64x0/common.c b/arch/arm/mach-s5p64x0/common.c
index 8ae5800..a339fbb 100644
--- a/arch/arm/mach-s5p64x0/common.c
+++ b/arch/arm/mach-s5p64x0/common.c
@@ -48,6 +48,7 @@
#include <plat/gpio-cfg.h>
#include <plat/regs-irqtype.h>
#include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
#include <plat/watchdog-reset.h>
#include "common.h"
@@ -156,6 +157,12 @@ static void s5p64x0_idle(void)
cpu_do_idle();
}
+static const struct samsung_timer_variant s5p64x0_timer_variant = {
+ .bits = 32,
+ .prescale = 2,
+ .divisor = 1,
+};
+
/*
* s5p64x0_map_io
*
@@ -173,6 +180,8 @@ void __init s5p64x0_init_io(struct map_desc *mach_desc, int
size)
s5p_init_cpu(S5P64X0_SYS_ID);
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+
+ samsung_timer_set_variant(&s5p64x0_timer_variant);
}
void __init s5p6440_map_io(void)
diff --git a/arch/arm/mach-s5pc100/common.c b/arch/arm/mach-s5pc100/common.c
index cc6e561..09e76d4 100644
--- a/arch/arm/mach-s5pc100/common.c
+++ b/arch/arm/mach-s5pc100/common.c
@@ -47,6 +47,7 @@
#include <plat/onenand-core.h>
#include <plat/spi-core.h>
#include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
#include <plat/watchdog-reset.h>
#include "common.h"
@@ -131,6 +132,12 @@ static struct map_desc s5pc100_iodesc[] __initdata = {
}
};
+static const struct samsung_timer_variant s5pc100_timer_variant = {
+ .bits = 32,
+ .prescale = 2,
+ .divisor = 1,
+};
+
/*
* s5pc100_map_io
*
@@ -148,6 +155,8 @@ void __init s5pc100_init_io(struct map_desc *mach_desc, int
size)
s5p_init_cpu(S5P_VA_CHIPID);
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+
+ samsung_timer_set_variant(&s5pc100_timer_variant);
}
void __init s5pc100_map_io(void)
diff --git a/arch/arm/mach-s5pv210/common.c b/arch/arm/mach-s5pv210/common.c
index 9dfe93e..44d3a5c 100644
--- a/arch/arm/mach-s5pv210/common.c
+++ b/arch/arm/mach-s5pv210/common.c
@@ -42,6 +42,7 @@
#include <plat/fimc-core.h>
#include <plat/iic-core.h>
#include <plat/keypad-core.h>
+#include <plat/samsung-time.h>
#include <plat/tv-core.h>
#include <plat/spi-core.h>
#include <plat/regs-serial.h>
@@ -148,6 +149,12 @@ void s5pv210_restart(char mode, const char *cmd)
__raw_writel(0x1, S5P_SWRESET);
}
+static const struct samsung_timer_variant s5pv210_timer_variant = {
+ .bits = 32,
+ .prescale = 2,
+ .divisor = 1,
+};
+
/*
* s5pv210_map_io
*
@@ -165,6 +172,8 @@ void __init s5pv210_init_io(struct map_desc *mach_desc, int
size)
s5p_init_cpu(S5P_VA_CHIPID);
s3c_init_cpu(samsung_cpu_id, cpu_ids, ARRAY_SIZE(cpu_ids));
+
+ samsung_timer_set_variant(&s5pv210_timer_variant);
}
void __init s5pv210_map_io(void)
diff --git a/arch/arm/plat-samsung/include/plat/samsung-time.h
b/arch/arm/plat-samsung/include/plat/samsung-time.h
index 4cc99bb..09077f4 100644
--- a/arch/arm/plat-samsung/include/plat/samsung-time.h
+++ b/arch/arm/plat-samsung/include/plat/samsung-time.h
@@ -27,26 +27,28 @@ struct samsung_timer_source {
unsigned int source_id;
};
+/**
+ * struct samsung_timer_variant - SoC-specific parameters of Samsung PWM timers
+ * @bits: bit width of time counters
+ * @prescale: prescaler divisor
+ * @divisor: main divisor
+ */
+struct samsung_timer_variant {
+ int bits;
+ u16 prescale;
+ u16 divisor;
+};
+
/* Be able to sleep for atleast 4 seconds (usually more) */
#define SAMSUNG_TIMER_MIN_RANGE 4
-#if defined(CONFIG_ARCH_S3C24XX) || defined(CONFIG_ARCH_S5PC100)
-#define TCNT_MAX 0xffff
-#define TSCALER_DIV 25
-#define TDIV 50
-#define TSIZE 16
-#else
-#define TCNT_MAX 0xffffffff
-#define TSCALER_DIV 2
-#define TDIV 2
-#define TSIZE 32
-#endif
-
#define NON_PERIODIC 0
#define PERIODIC 1
-extern void __init samsung_set_timer_source(enum samsung_timer_mode event,
+extern void samsung_set_timer_source(enum samsung_timer_mode event,
enum samsung_timer_mode source);
+extern void samsung_timer_set_variant(
+ const struct samsung_timer_variant *variant);
extern void __init samsung_timer_init(void);
diff --git a/drivers/clocksource/samsung-time.c
b/drivers/clocksource/samsung-time.c
index f899cbc..2b617c4 100644
--- a/drivers/clocksource/samsung-time.c
+++ b/drivers/clocksource/samsung-time.c
@@ -33,6 +33,7 @@ static struct clk *tdiv_event;
static struct clk *tdiv_source;
static struct clk *timerclk;
static struct samsung_timer_source timer_source;
+static struct samsung_timer_variant timer_variant;
static unsigned long clock_count_per_tick;
static void samsung_timer_resume(void);
@@ -213,12 +214,16 @@ static void samsung_set_mode(enum clock_event_mode mode,
static void samsung_timer_resume(void)
{
+ u32 tcnt_max;
+
+ tcnt_max = (1UL << timer_variant.bits) - 1;
+
/* event timer restart */
samsung_time_setup(timer_source.event_id, clock_count_per_tick);
samsung_time_start(timer_source.event_id, PERIODIC);
/* source timer restart */
- samsung_time_setup(timer_source.source_id, TCNT_MAX);
+ samsung_time_setup(timer_source.source_id, tcnt_max);
samsung_time_start(timer_source.source_id, PERIODIC);
}
@@ -232,6 +237,12 @@ void __init samsung_set_timer_source(enum
samsung_timer_mode event,
timer_source.source_id = source;
}
+void __init samsung_timer_set_variant(
+ const struct samsung_timer_variant *variant)
+{
+ timer_variant = *variant;
+}
+
static struct clock_event_device time_event_device = {
.name = "samsung_event_timer",
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
@@ -267,8 +278,9 @@ static void __init samsung_clockevent_init(void)
tscaler = clk_get_parent(tdiv_event);
- clk_set_rate(tscaler, pclk / TSCALER_DIV);
- clk_set_rate(tdiv_event, pclk / TDIV);
+ clk_set_rate(tscaler, pclk / timer_variant.prescale);
+ clk_set_rate(tdiv_event, pclk /
+ (timer_variant.prescale * timer_variant.divisor));
clk_set_parent(tin_event, tdiv_event);
clock_rate = clk_get_rate(tin_event);
@@ -326,21 +338,29 @@ static void __init samsung_clocksource_init(void)
{
unsigned long pclk;
unsigned long clock_rate;
+ u32 tcnt_max;
+ int ret;
+
+ tcnt_max = (1UL << timer_variant.bits) - 1;
pclk = clk_get_rate(timerclk);
- clk_set_rate(tdiv_source, pclk / TDIV);
+ clk_set_rate(tdiv_source, pclk /
+ (timer_variant.prescale * timer_variant.divisor));
clk_set_parent(tin_source, tdiv_source);
clock_rate = clk_get_rate(tin_source);
- samsung_time_setup(timer_source.source_id, TCNT_MAX);
+ samsung_time_setup(timer_source.source_id, tcnt_max);
samsung_time_start(timer_source.source_id, PERIODIC);
- setup_sched_clock(samsung_read_sched_clock, TSIZE, clock_rate);
+ setup_sched_clock(samsung_read_sched_clock,
+ timer_variant.bits, clock_rate);
- if (clocksource_mmio_init(samsung_timer_reg(),
"samsung_clocksource_timer",
- clock_rate, 250, TSIZE, clocksource_mmio_readl_down))
+ ret = clocksource_mmio_init(samsung_timer_reg(),
+ "samsung_clocksource_timer", clock_rate, 250,
+ timer_variant.bits, clocksource_mmio_readl_down);
+ if (ret)
panic("samsung_clocksource_timer: can't register
clocksource\n");
}
@@ -388,6 +408,12 @@ static void __init samsung_timer_resources(void)
void __init samsung_timer_init(void)
{
+ if (!timer_source.source_id && !timer_source.event_id)
+ panic("timer sources not set (see
samsung_set_timer_source)!\n");
+
+ if (!timer_variant.bits)
+ panic("timer variant not set (see
samsung_timer_set_variant)!\n");
+
samsung_timer_resources();
samsung_clockevent_init();
samsung_clocksource_init();
--
1.8.1.5
--
To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
