ARM: S3C24XX: Add samsung-time support for s3c24xx

Signed-off-by: Naour Romain <romain.naour@openwide.fr>
Reviewed-by: Tomasz Figa <tomasz.figa@gmail.com>
[heiko@sntech.de: tested on a s3c2416 based machine]
Reviewed-and-Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

28 files changed, 100 insertions, 35 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 5b714695b01b..967bcd31eb3b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -770,8 +770,10 @@ config ARCH_SA1100
 config ARCH_S3C24XX
         bool "Samsung S3C24XX SoCs"
         select ARCH_HAS_CPUFREQ
-        select ARCH_USES_GETTIMEOFFSET
         select CLKDEV_LOOKUP
+        select CLKSRC_MMIO
+        select GENERIC_CLOCKEVENTS
+        select GENERIC_GPIO
         select HAVE_CLK
         select HAVE_S3C2410_I2C if I2C
         select HAVE_S3C2410_WATCHDOG if WATCHDOG
diff --git a/arch/arm/mach-s3c24xx/Kconfig b/arch/arm/mach-s3c24xx/Kconfig
index 37f513d1588e..0c5e4fb61117 100644
--- a/arch/arm/mach-s3c24xx/Kconfig
+++ b/arch/arm/mach-s3c24xx/Kconfig
@@ -30,6 +30,7 @@ config CPU_S3C2410
         select S3C2410_CLOCK
         select S3C2410_CPUFREQ if CPU_FREQ_S3C24XX
         select S3C2410_PM if PM
+        select SAMSUNG_HRT
         help
           Support for S3C2410 and S3C2410A family from the S3C24XX line
           of Samsung Mobile CPUs.
@@ -41,6 +42,7 @@ config CPU_S3C2412
         select CPU_LLSERIAL_S3C2440
         select S3C2412_DMA if S3C24XX_DMA
         select S3C2412_PM if PM
+        select SAMSUNG_HRT
         help
           Support for the S3C2412 and S3C2413 SoCs from the S3C24XX line
 
@@ -53,6 +55,7 @@ config CPU_S3C2416
         select S3C2443_COMMON
         select S3C2443_DMA if S3C24XX_DMA
         select SAMSUNG_CLKSRC
+        select SAMSUNG_HRT
         help
           Support for the S3C2416 SoC from the S3C24XX line
 
@@ -63,6 +66,7 @@ config CPU_S3C2440
         select S3C2410_CLOCK
         select S3C2410_PM if PM
         select S3C2440_DMA if S3C24XX_DMA
+        select SAMSUNG_HRT
         help
           Support for S3C2440 Samsung Mobile CPU based systems.
 
@@ -72,6 +76,7 @@ config CPU_S3C2442
         select CPU_LLSERIAL_S3C2440
         select S3C2410_CLOCK
         select S3C2410_PM if PM
+        select SAMSUNG_HRT
         help
           Support for S3C2442 Samsung Mobile CPU based systems.
 
@@ -87,6 +92,7 @@ config CPU_S3C2443
         select S3C2443_COMMON
         select S3C2443_DMA if S3C24XX_DMA
         select SAMSUNG_CLKSRC
+        select SAMSUNG_HRT
         help
           Support for the S3C2443 SoC from the S3C24XX line
 
diff --git a/arch/arm/mach-s3c24xx/mach-amlm5900.c b/arch/arm/mach-s3c24xx/mach-amlm5900.c
index 0e0279e79150..432144cb54ae 100644
--- a/arch/arm/mach-s3c24xx/mach-amlm5900.c
+++ b/arch/arm/mach-s3c24xx/mach-amlm5900.c
@@ -63,6 +63,8 @@
 #include <linux/mtd/map.h>
 #include <linux/mtd/physmap.h>
 
+#include <plat/samsung-time.h>
+
 #include "common.h"
 
 static struct resource amlm5900_nor_resource =
@@ -160,6 +162,7 @@ static void __init amlm5900_map_io(void)
         s3c24xx_init_io(amlm5900_iodesc, ARRAY_SIZE(amlm5900_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(amlm5900_uartcfgs, ARRAY_SIZE(amlm5900_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 #ifdef CONFIG_FB_S3C2410
@@ -237,6 +240,6 @@ MACHINE_START(AML_M5900, "AML_M5900")
         .map_io         = amlm5900_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = amlm5900_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-anubis.c b/arch/arm/mach-s3c24xx/mach-anubis.c
index bb595f15ce36..24f1a04ccc88 100644
--- a/arch/arm/mach-s3c24xx/mach-anubis.c
+++ b/arch/arm/mach-s3c24xx/mach-anubis.c
@@ -49,6 +49,7 @@
 #include <plat/devs.h>
 #include <plat/cpu.h>
 #include <linux/platform_data/asoc-s3c24xx_simtec.h>
+#include <plat/samsung-time.h>
 
 #include "anubis.h"
 #include "common.h"
@@ -410,6 +411,7 @@ static void __init anubis_map_io(void)
         s3c24xx_init_io(anubis_iodesc, ARRAY_SIZE(anubis_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(anubis_uartcfgs, ARRAY_SIZE(anubis_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 
         /* check for the newer revision boards with large page nand */
 
@@ -444,6 +446,6 @@ MACHINE_START(ANUBIS, "Simtec-Anubis")
         .map_io         = anubis_map_io,
         .init_machine   = anubis_init,
         .init_irq       = s3c24xx_init_irq,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-at2440evb.c b/arch/arm/mach-s3c24xx/mach-at2440evb.c
index b4bc60c78ebb..2bf6c8c24317 100644
--- a/arch/arm/mach-s3c24xx/mach-at2440evb.c
+++ b/arch/arm/mach-s3c24xx/mach-at2440evb.c
@@ -48,6 +48,7 @@
 #include <plat/devs.h>
 #include <plat/cpu.h>
 #include <linux/platform_data/mmc-s3cmci.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 
@@ -192,6 +193,7 @@ static void __init at2440evb_map_io(void)
         s3c24xx_init_io(at2440evb_iodesc, ARRAY_SIZE(at2440evb_iodesc));
         s3c24xx_init_clocks(16934400);
         s3c24xx_init_uarts(at2440evb_uartcfgs, ARRAY_SIZE(at2440evb_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init at2440evb_init(void)
@@ -210,6 +212,6 @@ MACHINE_START(AT2440EVB, "AT2440EVB")
         .map_io         = at2440evb_map_io,
         .init_machine   = at2440evb_init,
         .init_irq       = s3c24xx_init_irq,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-bast.c b/arch/arm/mach-s3c24xx/mach-bast.c
index ca6618081041..eabe2db42ef6 100644
--- a/arch/arm/mach-s3c24xx/mach-bast.c
+++ b/arch/arm/mach-s3c24xx/mach-bast.c
@@ -55,6 +55,7 @@
 #include <plat/devs.h>
 #include <plat/gpio-cfg.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include "bast.h"
 #include "common.h"
@@ -576,6 +577,7 @@ static void __init bast_map_io(void)
         s3c24xx_init_io(bast_iodesc, ARRAY_SIZE(bast_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(bast_uartcfgs, ARRAY_SIZE(bast_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init bast_init(void)
@@ -605,6 +607,6 @@ MACHINE_START(BAST, "Simtec-BAST")
         .map_io         = bast_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = bast_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-gta02.c b/arch/arm/mach-s3c24xx/mach-gta02.c
index a25e8c5a7b4c..84a750d46d4b 100644
--- a/arch/arm/mach-s3c24xx/mach-gta02.c
+++ b/arch/arm/mach-s3c24xx/mach-gta02.c
@@ -81,6 +81,7 @@
 #include <plat/gpio-cfg.h>
 #include <plat/pm.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "gta02.h"
@@ -501,6 +502,7 @@ static void __init gta02_map_io(void)
         s3c24xx_init_io(gta02_iodesc, ARRAY_SIZE(gta02_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(gta02_uartcfgs, ARRAY_SIZE(gta02_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 
@@ -589,6 +591,6 @@ MACHINE_START(NEO1973_GTA02, "GTA02")
         .map_io         = gta02_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = gta02_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-h1940.c b/arch/arm/mach-s3c24xx/mach-h1940.c
index 79bc0830d740..8dd660102846 100644
--- a/arch/arm/mach-s3c24xx/mach-h1940.c
+++ b/arch/arm/mach-s3c24xx/mach-h1940.c
@@ -62,7 +62,7 @@
 #include <plat/pll.h>
 #include <plat/pm.h>
 #include <plat/regs-serial.h>
-
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "h1940.h"
@@ -646,6 +646,7 @@ static void __init h1940_map_io(void)
         s3c24xx_init_io(h1940_iodesc, ARRAY_SIZE(h1940_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(h1940_uartcfgs, ARRAY_SIZE(h1940_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 
         /* setup PM */
 
@@ -741,6 +742,6 @@ MACHINE_START(H1940, "IPAQ-H1940")
         .reserve        = h1940_reserve,
         .init_irq       = h1940_init_irq,
         .init_machine   = h1940_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-jive.c b/arch/arm/mach-s3c24xx/mach-jive.c
index ca08d7df07f7..aade943288c7 100644
--- a/arch/arm/mach-s3c24xx/mach-jive.c
+++ b/arch/arm/mach-s3c24xx/mach-jive.c
@@ -52,6 +52,7 @@
 #include <plat/cpu.h>
 #include <plat/pm.h>
 #include <linux/platform_data/usb-s3c2410_udc.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "s3c2412-power.h"
@@ -506,6 +507,7 @@ static void __init jive_map_io(void)
         s3c24xx_init_io(jive_iodesc, ARRAY_SIZE(jive_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(jive_uartcfgs, ARRAY_SIZE(jive_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void jive_power_off(void)
@@ -661,6 +663,6 @@ MACHINE_START(JIVE, "JIVE")
         .init_irq       = s3c24xx_init_irq,
         .map_io         = jive_map_io,
         .init_machine   = jive_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2412_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-mini2440.c b/arch/arm/mach-s3c24xx/mach-mini2440.c
index 2865e5919f2c..29f106cb370e 100644
--- a/arch/arm/mach-s3c24xx/mach-mini2440.c
+++ b/arch/arm/mach-s3c24xx/mach-mini2440.c
@@ -56,6 +56,7 @@
 #include <plat/clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include <sound/s3c24xx_uda134x.h>
 
@@ -525,6 +526,7 @@ static void __init mini2440_map_io(void)
         s3c24xx_init_io(mini2440_iodesc, ARRAY_SIZE(mini2440_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(mini2440_uartcfgs, ARRAY_SIZE(mini2440_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 /*
@@ -687,6 +689,6 @@ MACHINE_START(MINI2440, "MINI2440")
         .map_io         = mini2440_map_io,
         .init_machine   = mini2440_init,
         .init_irq       = s3c24xx_init_irq,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-n30.c b/arch/arm/mach-s3c24xx/mach-n30.c
index 8017c0fc1729..73a690f431e6 100644
--- a/arch/arm/mach-s3c24xx/mach-n30.c
+++ b/arch/arm/mach-s3c24xx/mach-n30.c
@@ -49,6 +49,7 @@
 #include <plat/devs.h>
 #include <linux/platform_data/mmc-s3cmci.h>
 #include <linux/platform_data/usb-s3c2410_udc.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 
@@ -535,6 +536,7 @@ static void __init n30_map_io(void)
         n30_hwinit();
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(n30_uartcfgs, ARRAY_SIZE(n30_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 /* GPB3 is the line that controls the pull-up for the USB D+ line */
@@ -588,7 +590,7 @@ MACHINE_START(N30, "Acer-N30")
                                 Ben Dooks <ben-linux@fluff.org>
         */
         .atag_offset    = 0x100,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .init_machine   = n30_init,
         .init_irq       = s3c24xx_init_irq,
         .map_io         = n30_map_io,
@@ -599,7 +601,7 @@ MACHINE_START(N35, "Acer-N35")
         /* Maintainer: Christer Weinigel <christer@weinigel.se>
         */
         .atag_offset    = 0x100,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .init_machine   = n30_init,
         .init_irq       = s3c24xx_init_irq,
         .map_io         = n30_map_io,
diff --git a/arch/arm/mach-s3c24xx/mach-nexcoder.c b/arch/arm/mach-s3c24xx/mach-nexcoder.c
index 144b9f80c4a5..5c826d10a66d 100644
--- a/arch/arm/mach-s3c24xx/mach-nexcoder.c
+++ b/arch/arm/mach-s3c24xx/mach-nexcoder.c
@@ -44,6 +44,7 @@
 #include <plat/clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 
@@ -135,6 +136,7 @@ static void __init nexcoder_map_io(void)
         s3c24xx_init_io(nexcoder_iodesc, ARRAY_SIZE(nexcoder_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(nexcoder_uartcfgs, ARRAY_SIZE(nexcoder_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 
         nexcoder_sensorboard_init();
 }
@@ -151,6 +153,6 @@ MACHINE_START(NEXCODER_2440, "NexVision - Nexcoder 2440")
         .map_io         = nexcoder_map_io,
         .init_machine   = nexcoder_init,
         .init_irq       = s3c24xx_init_irq,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-osiris.c b/arch/arm/mach-s3c24xx/mach-osiris.c
index ae2cbdf3e3ca..4c90ffda4e11 100644
--- a/arch/arm/mach-s3c24xx/mach-osiris.c
+++ b/arch/arm/mach-s3c24xx/mach-osiris.c
@@ -45,6 +45,7 @@
 #include <plat/devs.h>
 #include <plat/gpio-cfg.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include <mach/hardware.h>
 #include <mach/regs-gpio.h>
@@ -384,6 +385,7 @@ static void __init osiris_map_io(void)
         s3c24xx_init_io(osiris_iodesc, ARRAY_SIZE(osiris_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(osiris_uartcfgs, ARRAY_SIZE(osiris_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 
         /* check for the newer revision boards with large page nand */
 
@@ -426,6 +428,6 @@ MACHINE_START(OSIRIS, "Simtec-OSIRIS")
         .map_io         = osiris_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = osiris_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-otom.c b/arch/arm/mach-s3c24xx/mach-otom.c
index deb0ace585b0..7b8670746b6a 100644
--- a/arch/arm/mach-s3c24xx/mach-otom.c
+++ b/arch/arm/mach-s3c24xx/mach-otom.c
@@ -33,6 +33,7 @@
 #include <plat/cpu.h>
 #include <plat/devs.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "otom.h"
@@ -101,6 +102,7 @@ static void __init otom11_map_io(void)
         s3c24xx_init_io(otom11_iodesc, ARRAY_SIZE(otom11_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(otom11_uartcfgs, ARRAY_SIZE(otom11_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init otom11_init(void)
@@ -115,6 +117,6 @@ MACHINE_START(OTOM, "Nex Vision - Otom 1.1")
         .map_io         = otom11_map_io,
         .init_machine   = otom11_init,
         .init_irq       = s3c24xx_init_irq,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-qt2410.c b/arch/arm/mach-s3c24xx/mach-qt2410.c
index 84c541602661..71cf29b12d1f 100644
--- a/arch/arm/mach-s3c24xx/mach-qt2410.c
+++ b/arch/arm/mach-s3c24xx/mach-qt2410.c
@@ -59,6 +59,7 @@
 #include <plat/devs.h>
 #include <plat/cpu.h>
 #include <plat/pm.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "common-smdk.h"
@@ -304,6 +305,7 @@ static void __init qt2410_map_io(void)
         s3c24xx_init_io(qt2410_iodesc, ARRAY_SIZE(qt2410_iodesc));
         s3c24xx_init_clocks(12*1000*1000);
         s3c24xx_init_uarts(smdk2410_uartcfgs, ARRAY_SIZE(smdk2410_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init qt2410_machine_init(void)
@@ -343,6 +345,6 @@ MACHINE_START(QT2410, "QT2410")
         .map_io         = qt2410_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = qt2410_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-rx1950.c b/arch/arm/mach-s3c24xx/mach-rx1950.c
index 1f9ba2ae5288..799af43b4e6a 100644
--- a/arch/arm/mach-s3c24xx/mach-rx1950.c
+++ b/arch/arm/mach-s3c24xx/mach-rx1950.c
@@ -58,6 +58,7 @@
 #include <plat/pm.h>
 #include <plat/regs-iic.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "h1940.h"
@@ -741,6 +742,7 @@ static void __init rx1950_map_io(void)
         s3c24xx_init_io(rx1950_iodesc, ARRAY_SIZE(rx1950_iodesc));
         s3c24xx_init_clocks(16934000);
         s3c24xx_init_uarts(rx1950_uartcfgs, ARRAY_SIZE(rx1950_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 
         /* setup PM */
 
@@ -813,6 +815,6 @@ MACHINE_START(RX1950, "HP iPAQ RX1950")
         .reserve        = rx1950_reserve,
         .init_irq = s3c24xx_init_irq,
         .init_machine = rx1950_init_machine,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-rx3715.c b/arch/arm/mach-s3c24xx/mach-rx3715.c
index f20418a2fb1b..0a3c96452f0f 100644
--- a/arch/arm/mach-s3c24xx/mach-rx3715.c
+++ b/arch/arm/mach-s3c24xx/mach-rx3715.c
@@ -49,6 +49,7 @@
 #include <plat/devs.h>
 #include <plat/pm.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "h1940.h"
@@ -179,6 +180,7 @@ static void __init rx3715_map_io(void)
         s3c24xx_init_io(rx3715_iodesc, ARRAY_SIZE(rx3715_iodesc));
         s3c24xx_init_clocks(16934000);
         s3c24xx_init_uarts(rx3715_uartcfgs, ARRAY_SIZE(rx3715_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 /* H1940 and RX3715 need to reserve this for suspend */
@@ -212,6 +214,6 @@ MACHINE_START(RX3715, "IPAQ-RX3715")
         .reserve        = rx3715_reserve,
         .init_irq       = rx3715_init_irq,
         .init_machine   = rx3715_init_machine,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2410.c b/arch/arm/mach-s3c24xx/mach-smdk2410.c
index cd0b1635c47e..fd96f7fc330c 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2410.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2410.c
@@ -51,6 +51,7 @@
 
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "common-smdk.h"
@@ -100,6 +101,7 @@ static void __init smdk2410_map_io(void)
         s3c24xx_init_io(smdk2410_iodesc, ARRAY_SIZE(smdk2410_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(smdk2410_uartcfgs, ARRAY_SIZE(smdk2410_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init smdk2410_init(void)
@@ -116,6 +118,6 @@ MACHINE_START(SMDK2410, "SMDK2410") /* @TODO: request a new identifier and switc
         .map_io         = smdk2410_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = smdk2410_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2413.c b/arch/arm/mach-s3c24xx/mach-smdk2413.c
index 79485907950f..8e3f1d9bbb7c 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2413.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2413.c
@@ -44,6 +44,7 @@
 #include <plat/clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "common-smdk.h"
@@ -105,6 +106,7 @@ static void __init smdk2413_map_io(void)
         s3c24xx_init_io(smdk2413_iodesc, ARRAY_SIZE(smdk2413_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(smdk2413_uartcfgs, ARRAY_SIZE(smdk2413_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init smdk2413_machine_init(void)
@@ -131,7 +133,7 @@ MACHINE_START(S3C2413, "S3C2413")
         .init_irq       = s3c24xx_init_irq,
         .map_io         = smdk2413_map_io,
         .init_machine   = smdk2413_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2412_restart,
 MACHINE_END
 
@@ -143,7 +145,7 @@ MACHINE_START(SMDK2412, "SMDK2412")
         .init_irq       = s3c24xx_init_irq,
         .map_io         = smdk2413_map_io,
         .init_machine   = smdk2413_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2412_restart,
 MACHINE_END
 
@@ -155,6 +157,6 @@ MACHINE_START(SMDK2413, "SMDK2413")
         .init_irq       = s3c24xx_init_irq,
         .map_io         = smdk2413_map_io,
         .init_machine   = smdk2413_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2412_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2416.c b/arch/arm/mach-s3c24xx/mach-smdk2416.c
index 037a5da343bd..cb46847c66b4 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2416.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2416.c
@@ -50,6 +50,7 @@
 #include <plat/sdhci.h>
 #include <linux/platform_data/usb-s3c2410_udc.h>
 #include <linux/platform_data/s3c-hsudc.h>
+#include <plat/samsung-time.h>
 
 #include <plat/fb.h>
 
@@ -221,6 +222,7 @@ static void __init smdk2416_map_io(void)
         s3c24xx_init_io(smdk2416_iodesc, ARRAY_SIZE(smdk2416_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(smdk2416_uartcfgs, ARRAY_SIZE(smdk2416_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init smdk2416_machine_init(void)
@@ -253,6 +255,6 @@ MACHINE_START(SMDK2416, "SMDK2416")
         .init_irq       = s3c2416_init_irq,
         .map_io         = smdk2416_map_io,
         .init_machine   = smdk2416_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2416_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2440.c b/arch/arm/mach-s3c24xx/mach-smdk2440.c
index 29d31314e23c..f56cb08e6d1c 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2440.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2440.c
@@ -41,6 +41,7 @@
 #include <plat/clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "common-smdk.h"
@@ -160,6 +161,7 @@ static void __init smdk2440_map_io(void)
         s3c24xx_init_io(smdk2440_iodesc, ARRAY_SIZE(smdk2440_iodesc));
         s3c24xx_init_clocks(16934400);
         s3c24xx_init_uarts(smdk2440_uartcfgs, ARRAY_SIZE(smdk2440_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init smdk2440_machine_init(void)
@@ -178,6 +180,6 @@ MACHINE_START(S3C2440, "SMDK2440")
         .init_irq       = s3c24xx_init_irq,
         .map_io         = smdk2440_map_io,
         .init_machine   = smdk2440_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c244x_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-smdk2443.c b/arch/arm/mach-s3c24xx/mach-smdk2443.c
index b3be4c4dc7bc..9435c3bef18a 100644
--- a/arch/arm/mach-s3c24xx/mach-smdk2443.c
+++ b/arch/arm/mach-s3c24xx/mach-smdk2443.c
@@ -41,6 +41,7 @@
 #include <plat/clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 #include "common-smdk.h"
@@ -121,6 +122,7 @@ static void __init smdk2443_map_io(void)
         s3c24xx_init_io(smdk2443_iodesc, ARRAY_SIZE(smdk2443_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(smdk2443_uartcfgs, ARRAY_SIZE(smdk2443_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init smdk2443_machine_init(void)
@@ -142,6 +144,6 @@ MACHINE_START(SMDK2443, "SMDK2443")
         .init_irq       = s3c2443_init_irq,
         .map_io         = smdk2443_map_io,
         .init_machine   = smdk2443_machine_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2443_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-tct_hammer.c b/arch/arm/mach-s3c24xx/mach-tct_hammer.c
index 24b3d79e7b2c..31dfe589e349 100644
--- a/arch/arm/mach-s3c24xx/mach-tct_hammer.c
+++ b/arch/arm/mach-s3c24xx/mach-tct_hammer.c
@@ -53,6 +53,7 @@
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/physmap.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 
@@ -136,6 +137,7 @@ static void __init tct_hammer_map_io(void)
         s3c24xx_init_io(tct_hammer_iodesc, ARRAY_SIZE(tct_hammer_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(tct_hammer_uartcfgs, ARRAY_SIZE(tct_hammer_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init tct_hammer_init(void)
@@ -149,6 +151,6 @@ MACHINE_START(TCT_HAMMER, "TCT_HAMMER")
         .map_io         = tct_hammer_map_io,
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = tct_hammer_init,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-vr1000.c b/arch/arm/mach-s3c24xx/mach-vr1000.c
index ec42d1e4e465..deeb8a0a4034 100644
--- a/arch/arm/mach-s3c24xx/mach-vr1000.c
+++ b/arch/arm/mach-s3c24xx/mach-vr1000.c
@@ -45,6 +45,7 @@
 #include <plat/cpu.h>
 #include <plat/devs.h>
 #include <plat/regs-serial.h>
+#include <plat/samsung-time.h>
 
 #include "bast.h"
 #include "common.h"
@@ -332,6 +333,7 @@ static void __init vr1000_map_io(void)
         s3c24xx_init_io(vr1000_iodesc, ARRAY_SIZE(vr1000_iodesc));
         s3c24xx_init_clocks(0);
         s3c24xx_init_uarts(vr1000_uartcfgs, ARRAY_SIZE(vr1000_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init vr1000_init(void)
@@ -354,6 +356,6 @@ MACHINE_START(VR1000, "Thorcom-VR1000")
         .map_io         = vr1000_map_io,
         .init_machine   = vr1000_init,
         .init_irq       = s3c24xx_init_irq,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2410_restart,
 MACHINE_END
diff --git a/arch/arm/mach-s3c24xx/mach-vstms.c b/arch/arm/mach-s3c24xx/mach-vstms.c
index 239129c2d8bc..622a1ed24509 100644
--- a/arch/arm/mach-s3c24xx/mach-vstms.c
+++ b/arch/arm/mach-s3c24xx/mach-vstms.c
@@ -44,6 +44,7 @@
 #include <plat/clock.h>
 #include <plat/devs.h>
 #include <plat/cpu.h>
+#include <plat/samsung-time.h>
 
 #include "common.h"
 
@@ -142,6 +143,7 @@ static void __init vstms_map_io(void)
         s3c24xx_init_io(vstms_iodesc, ARRAY_SIZE(vstms_iodesc));
         s3c24xx_init_clocks(12000000);
         s3c24xx_init_uarts(vstms_uartcfgs, ARRAY_SIZE(vstms_uartcfgs));
+        samsung_set_timer_source(SAMSUNG_PWM3, SAMSUNG_PWM4);
 }
 
 static void __init vstms_init(void)
@@ -159,6 +161,6 @@ MACHINE_START(VSTMS, "VSTMS")
         .init_irq       = s3c24xx_init_irq,
         .init_machine   = vstms_init,
         .map_io         = vstms_map_io,
-        .init_time      = s3c24xx_timer_init,
+        .init_time      = samsung_timer_init,
         .restart        = s3c2412_restart,
 MACHINE_END
diff --git a/arch/arm/plat-samsung/include/plat/cpu.h b/arch/arm/plat-samsung/include/plat/cpu.h
index 37703ef6dfc7..100c29606e1e 100644
--- a/arch/arm/plat-samsung/include/plat/cpu.h
+++ b/arch/arm/plat-samsung/include/plat/cpu.h
@@ -192,7 +192,7 @@ extern void s3c24xx_init_uartdevs(char *name,
                                   struct s3c24xx_uart_resources *res,
                                   struct s3c2410_uartcfg *cfg, int no);
 
-/* timer for 2410/2440 */
+/* timer for s5pc100 only */
 
 extern void s3c24xx_timer_init(void);
 
diff --git a/arch/arm/plat-samsung/include/plat/samsung-time.h b/arch/arm/plat-samsung/include/plat/samsung-time.h
index c686f6a53c8d..21198ace3845 100644
--- a/arch/arm/plat-samsung/include/plat/samsung-time.h
+++ b/arch/arm/plat-samsung/include/plat/samsung-time.h
@@ -30,7 +30,18 @@ struct samsung_timer_source {
 /* Be able to sleep for atleast 4 seconds (usually more) */
 #define SAMSUNG_TIMER_MIN_RANGE 4
 
+#ifdef CONFIG_ARCH_S3C24XX
+#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
 
diff --git a/arch/arm/plat-samsung/samsung-time.c b/arch/arm/plat-samsung/samsung-time.c
index aa8aa8014cc1..f899cbc9b288 100644
--- a/arch/arm/plat-samsung/samsung-time.c
+++ b/arch/arm/plat-samsung/samsung-time.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
  *              http://www.samsung.com/
  *
- * SAMSUNG - Common hr-timer support
+ * samsung - Common hr-timer support (s3c and s5p)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -267,8 +267,8 @@ static void __init samsung_clockevent_init(void)
 
         tscaler = clk_get_parent(tdiv_event);
 
-        clk_set_rate(tscaler, pclk / 2);
-        clk_set_rate(tdiv_event, pclk / 2);
+        clk_set_rate(tscaler, pclk / TSCALER_DIV);
+        clk_set_rate(tdiv_event, pclk / TDIV);
         clk_set_parent(tin_event, tdiv_event);
 
         clock_rate = clk_get_rate(tin_event);
@@ -329,7 +329,7 @@ static void __init samsung_clocksource_init(void)
 
         pclk = clk_get_rate(timerclk);
 
-        clk_set_rate(tdiv_source, pclk / 2);
+        clk_set_rate(tdiv_source, pclk / TDIV);
         clk_set_parent(tin_source, tdiv_source);
 
         clock_rate = clk_get_rate(tin_source);
@@ -337,10 +337,10 @@ static void __init samsung_clocksource_init(void)
         samsung_time_setup(timer_source.source_id, TCNT_MAX);
         samsung_time_start(timer_source.source_id, PERIODIC);
 
-        setup_sched_clock(samsung_read_sched_clock, 32, clock_rate);
+        setup_sched_clock(samsung_read_sched_clock, TSIZE, clock_rate);
 
         if (clocksource_mmio_init(samsung_timer_reg(), "samsung_clocksource_timer",
-                        clock_rate, 250, 32, clocksource_mmio_readl_down))
+                        clock_rate, 250, TSIZE, clocksource_mmio_readl_down))
                 panic("samsung_clocksource_timer: can't register clocksource\n");
 }