[ARM] 4908/1: [AT91] RTT platform_device fix

The RTT-as-RTC driver will search for the user-specified RTT
peripheral via ID number (0 .. 1).
Therefore if the processor only contains a single RTT peripheral, we
need to set its platform_device.id to "0" instead of "-1".
Also add the missing platform_device resource for the CAP9 processor.

Bug reported by Sedji Gaouaou.

Signed-off-by: Andrew Victor <linux@maxim.org.za>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

4 files changed, 14 insertions, 5 deletions

diff --git a/arch/arm/mach-at91/at91cap9_devices.c b/arch/arm/mach-at91/at91cap9_devices.c
index 10f15f3a56ca..7d782ee4117b 100644
--- a/arch/arm/mach-at91/at91cap9_devices.c
+++ b/arch/arm/mach-at91/at91cap9_devices.c
@@ -540,10 +540,19 @@ void __init at91_add_device_spi(struct spi_board_info *devices, int nr_devices)
  *  RTT
  * -------------------------------------------------------------------- */
 
+static struct resource rtt_resources[] = {
+        {
+                .start  = AT91_BASE_SYS + AT91_RTT,
+                .end    = AT91_BASE_SYS + AT91_RTT + SZ_16 - 1,
+                .flags  = IORESOURCE_MEM,
+        }
+};
+
 static struct platform_device at91cap9_rtt_device = {
         .name           = "at91_rtt",
-        .id             = -1,
-        .num_resources  = 0,
+        .id             = 0,
+        .resource       = rtt_resources,
+        .num_resources  = ARRAY_SIZE(rtt_resources),
 };
 
 static void __init at91_add_device_rtt(void)
diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index d613761dc2f8..f20afe4d156c 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -558,7 +558,7 @@ static struct resource rtt_resources[] = {
 
 static struct platform_device at91sam9260_rtt_device = {
         .name           = "at91_rtt",
-        .id             = -1,
+        .id             = 0,
         .resource       = rtt_resources,
         .num_resources  = ARRAY_SIZE(rtt_resources),
 };
diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
index 48ecbeffd9b0..0bd0edf8fa3b 100644
--- a/arch/arm/mach-at91/at91sam9261_devices.c
+++ b/arch/arm/mach-at91/at91sam9261_devices.c
@@ -561,7 +561,7 @@ static struct resource rtt_resources[] = {
 
 static struct platform_device at91sam9261_rtt_device = {
         .name           = "at91_rtt",
-        .id             = -1,
+        .id             = 0,
         .resource       = rtt_resources,
         .num_resources  = ARRAY_SIZE(rtt_resources),
 };
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index 2a0abd25e773..8982b02c8b46 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -423,7 +423,7 @@ static struct resource rtt_resources[] = {
 
 static struct platform_device at91sam9rl_rtt_device = {
         .name           = "at91_rtt",
-        .id             = -1,
+        .id             = 0,
         .resource       = rtt_resources,
         .num_resources  = ARRAY_SIZE(rtt_resources),
 };