ARM: 7003/1: vexpress: Add clock definition for the SP805.

It seems that an entry for the SP805 watchdog in the table of clocks was
missing.  This results in the sp805_wdt driver rejecting the device with
the following errors:

  sp805-wdt mb:wdt: Clock not found
  sp805-wdt mb:wdt: Probe Failed!!!
  sp805-wdt: probe of mb:wdt failed with error -2

While not obviously stated in the hardware docs, the onboard SP810's
"REFCLK" is connected to a 32.768KHz crystal, and this drives the
watchdog.  Add a struct clk and corresponding lookup entry for it.

Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/arm/mach-vexpress/v2m.c b/arch/arm/mach-vexpress/v2m.c
index 9e6b93b1a043..d0d267a8d3f9 100644
--- a/arch/arm/mach-vexpress/v2m.c
+++ b/arch/arm/mach-vexpress/v2m.c
@@ -318,6 +318,10 @@ static struct clk v2m_sp804_clk = {
         .rate   = 1000000,
 };
 
+static struct clk v2m_ref_clk = {
+        .rate   = 32768,
+};
+
 static struct clk dummy_apb_pclk;
 
 static struct clk_lookup v2m_lookups[] = {
@@ -348,6 +352,9 @@ static struct clk_lookup v2m_lookups[] = {
         }, {    /* CLCD */
                 .dev_id         = "mb:clcd",
                 .clk            = &osc1_clk,
+        }, {    /* SP805 WDT */
+                .dev_id         = "mb:wdt",
+                .clk            = &v2m_ref_clk,
         }, {    /* SP804 timers */
                 .dev_id         = "sp804",
                 .con_id         = "v2m-timer0",