6 files changed, 77 insertions, 3 deletions

diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index f6b9011744aa..166f892a24d5 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -18,8 +18,10 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+#include <linux/clk.h>
 #include <linux/clocksource.h>
 #include <linux/clockchips.h>
+#include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/io.h>
@@ -32,8 +34,43 @@
 #define TIMER_FREQ_KHZ  (1000)
 #define TIMER_RELOAD    (TIMER_FREQ_KHZ * 1000 / HZ)
 
+static long __init sp804_get_clock_rate(const char *name)
+{
+        struct clk *clk;
+        long rate;
+        int err;
+
+        clk = clk_get_sys("sp804", name);
+        if (IS_ERR(clk)) {
+                pr_err("sp804: %s clock not found: %d\n", name,
+                        (int)PTR_ERR(clk));
+                return PTR_ERR(clk);
+        }
+
+        err = clk_enable(clk);
+        if (err) {
+                pr_err("sp804: %s clock failed to enable: %d\n", name, err);
+                clk_put(clk);
+                return err;
+        }
+
+        rate = clk_get_rate(clk);
+        if (rate < 0) {
+                pr_err("sp804: %s clock failed to get rate: %ld\n", name, rate);
+                clk_disable(clk);
+                clk_put(clk);
+        }
+
+        return rate;
+}
+
 void __init sp804_clocksource_init(void __iomem *base, const char *name)
 {
+        long rate = sp804_get_clock_rate(name);
+
+        if (rate < 0)
+                return;
+
         /* setup timer 0 as free-running clocksource */
         writel(0, base + TIMER_CTRL);
         writel(0xffffffff, base + TIMER_LOAD);
@@ -42,7 +79,7 @@ void __init sp804_clocksource_init(void __iomem *base, const char *name)
                 base + TIMER_CTRL);
 
         clocksource_mmio_init(base + TIMER_VALUE, name,
-                TIMER_FREQ_KHZ * 1000, 200, 32, clocksource_mmio_readl_down);
+                rate, 200, 32, clocksource_mmio_readl_down);
 }
 
 
diff --git a/arch/arm/mach-integrator/integrator_cp.c b/arch/arm/mach-integrator/integrator_cp.c
index 46fb7f580fef..8fb8afb014ef 100644
--- a/arch/arm/mach-integrator/integrator_cp.c
+++ b/arch/arm/mach-integrator/integrator_cp.c
@@ -229,10 +229,17 @@ static struct clk cp_auxclk = {
         .vcoreg = CM_AUXOSC,
 };
 
+static struct clk sp804_clk = {
+        .rate   = 1000000,
+};
+
 static struct clk_lookup cp_lookups[] = {
         {       /* CLCD */
                 .dev_id         = "mb:c0",
                 .clk            = &cp_auxclk,
+        }, {    /* SP804 timers */
+                .dev_id         = "sp804",
+                .clk            = &sp804_clk,
         },
 };
 
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 6356b5e2e111..6a9cd1eb4c2e 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -315,6 +315,10 @@ static struct clk ref24_clk = {
         .rate   = 24000000,
 };
 
+static struct clk sp804_clk = {
+        .rate   = 1000000,
+};
+
 static struct clk dummy_apb_pclk;
 
 static struct clk_lookup lookups[] = {
@@ -357,7 +361,10 @@ static struct clk_lookup lookups[] = {
         }, {    /* SSP */
                 .dev_id         = "dev:ssp0",
                 .clk            = &ref24_clk,
-        }
+        }, {    /* SP804 timers */
+                .dev_id         = "sp804",
+                .clk            = &sp804_clk,
+        },
 };
 
 void __init realview_init_early(void)
diff --git a/arch/arm/mach-versatile/core.c b/arch/arm/mach-versatile/core.c
index aad6d395be44..b0b7de6875ab 100644
--- a/arch/arm/mach-versatile/core.c
+++ b/arch/arm/mach-versatile/core.c
@@ -375,6 +375,10 @@ static struct clk ref24_clk = {
         .rate   = 24000000,
 };
 
+static struct clk sp804_clk = {
+        .rate   = 1000000,
+};
+
 static struct clk dummy_apb_pclk;
 
 static struct clk_lookup lookups[] = {
@@ -411,7 +415,10 @@ static struct clk_lookup lookups[] = {
         }, {    /* CLCD */
                 .dev_id         = "dev:20",
                 .clk            = &osc4_clk,
-        }
+        }, {    /* SP804 timers */
+                .dev_id         = "sp804",
+                .clk            = &sp804_clk,
+        },
 };
 
 /*
diff --git a/arch/arm/mach-vexpress/ct-ca9x4.c b/arch/arm/mach-vexpress/ct-ca9x4.c
index c833fd9505c5..6004f06cbde5 100644
--- a/arch/arm/mach-vexpress/ct-ca9x4.c
+++ b/arch/arm/mach-vexpress/ct-ca9x4.c
@@ -141,10 +141,18 @@ static struct clk osc1_clk = {
         .rate   = 24000000,
 };
 
+static struct clk ct_sp804_clk = {
+        .rate   = 1000000,
+};
+
 static struct clk_lookup lookups[] = {
         {       /* CLCD */
                 .dev_id         = "ct:clcd",
                 .clk            = &osc1_clk,
+        }, {    /* SP804 timers */
+                .dev_id         = "sp804",
+                .con_id         = "ct-timer1",
+                .clk            = &ct_sp804_clk,
         },
 };
 
diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index ccf1f899ac21..77d5db3d7808 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -333,6 +333,10 @@ static struct clk osc2_clk = {
         .rate   = 24000000,
 };
 
+static struct clk v2m_sp804_clk = {
+        .rate   = 1000000,
+};
+
 static struct clk dummy_apb_pclk;
 
 static struct clk_lookup v2m_lookups[] = {
@@ -363,6 +367,10 @@ static struct clk_lookup v2m_lookups[] = {
         }, {    /* CLCD */
                 .dev_id         = "mb:clcd",
                 .clk            = &osc1_clk,
+        }, {    /* SP804 timers */
+                .dev_id         = "sp804",
+                .con_id         = "v2m-timer1",
+                .clk            = &v2m_sp804_clk,
         },
 };