clocksource: ARM sp804: obtain sp804 timer rate via clks

This allows platforms to specify the rate of the SP804 clocksource via
the clk subsystem.  While ARM boards clock these at 1MHz, BCMRing also
has SP804 timers but are clocked at different rates.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 16 insertions, 0 deletions

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,
         },
 };