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authorShiraz Hashim <shiraz.hashim@st.com>2011-02-16 09:40:32 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2011-03-09 12:49:44 +0300
commit5c881d9ae9480171f01921585e1893863d7ab421 (patch)
tree1f25afe829901e5cfc79d21d4b99b005b1e8b69c /arch/arm/mach-spear6xx
parent53688c51e412b7fd642e5c8eb8ba8ee19744c4ea (diff)
downloadlinux-5c881d9ae9480171f01921585e1893863d7ab421.tar.xz
ARM: 6737/1: SPEAr: formalized timer support
Move platform specific timer initialization code is moved into platform specific files. Reviewed-by: Jamie Iles <jamie@jamieiles.com> Reviewed-by: Stanley Miao <stanley.miao@windriver.com> Signed-off-by: Shiraz Hashim <shiraz.hashim@st.com> Signed-off-by: Rajeev Kumar <rajeev-dlh.kumar@st.com> Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-spear6xx')
-rw-r--r--arch/arm/mach-spear6xx/include/mach/generic.h3
-rw-r--r--arch/arm/mach-spear6xx/spear600_evb.c2
-rw-r--r--arch/arm/mach-spear6xx/spear6xx.c31
3 files changed, 34 insertions, 2 deletions
diff --git a/arch/arm/mach-spear6xx/include/mach/generic.h b/arch/arm/mach-spear6xx/include/mach/generic.h
index 16205a538756..e5967ededdc3 100644
--- a/arch/arm/mach-spear6xx/include/mach/generic.h
+++ b/arch/arm/mach-spear6xx/include/mach/generic.h
@@ -31,9 +31,10 @@
/* Add spear6xx family device structure declarations here */
extern struct amba_device gpio_device[];
extern struct amba_device uart_device[];
-extern struct sys_timer spear_sys_timer;
+extern struct sys_timer spear6xx_timer;
/* Add spear6xx family function declarations here */
+void __init spear_setup_timer(void);
void __init spear6xx_map_io(void);
void __init spear6xx_init_irq(void);
void __init spear6xx_init(void);
diff --git a/arch/arm/mach-spear6xx/spear600_evb.c b/arch/arm/mach-spear6xx/spear600_evb.c
index daff8d04f7b6..b0ed0dfe9b01 100644
--- a/arch/arm/mach-spear6xx/spear600_evb.c
+++ b/arch/arm/mach-spear6xx/spear600_evb.c
@@ -46,6 +46,6 @@ MACHINE_START(SPEAR600, "ST-SPEAR600-EVB")
.boot_params = 0x00000100,
.map_io = spear6xx_map_io,
.init_irq = spear6xx_init_irq,
- .timer = &spear_sys_timer,
+ .timer = &spear6xx_timer,
.init_machine = spear600_evb_init,
MACHINE_END
diff --git a/arch/arm/mach-spear6xx/spear6xx.c b/arch/arm/mach-spear6xx/spear6xx.c
index f2fe14e8471d..9cd3a688f6dc 100644
--- a/arch/arm/mach-spear6xx/spear6xx.c
+++ b/arch/arm/mach-spear6xx/spear6xx.c
@@ -155,3 +155,34 @@ void __init spear6xx_map_io(void)
/* This will initialize clock framework */
clk_init();
}
+
+static void __init spear6xx_timer_init(void)
+{
+ char pclk_name[] = "pll3_48m_clk";
+ struct clk *gpt_clk, *pclk;
+
+ /* get the system timer clock */
+ gpt_clk = clk_get_sys("gpt0", NULL);
+ if (IS_ERR(gpt_clk)) {
+ pr_err("%s:couldn't get clk for gpt\n", __func__);
+ BUG();
+ }
+
+ /* get the suitable parent clock for timer*/
+ pclk = clk_get(NULL, pclk_name);
+ if (IS_ERR(pclk)) {
+ pr_err("%s:couldn't get %s as parent for gpt\n",
+ __func__, pclk_name);
+ BUG();
+ }
+
+ clk_set_parent(gpt_clk, pclk);
+ clk_put(gpt_clk);
+ clk_put(pclk);
+
+ spear_setup_timer();
+}
+
+struct sys_timer spear6xx_timer = {
+ .init = spear6xx_timer_init,
+};