[ARM] 4752/1: [AT91] RTT, RTC and WDT peripherals on SAM9

Add platform_device and initialization for the RTT (Real Time Timer)
and WDT (Watchdog) integrated in the Atmel AT91SAM9 processors.

For SAM9263, register both RTT peripherals.
   [From: David Brownell <dbrownell@users.sourceforge.net>]

Provide platform_resources for RTT peripherals
  [From: David Brownell <dbrownell@users.sourceforge.net>]

Add support for RTC peripheral on AT91SAM9RL (same RTC peripherals as
AT91RM9200)
  [From: David Brownell <dbrownell@users.sourceforge.net>]

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

5 files changed, 229 insertions, 4 deletions

diff --git a/arch/arm/mach-at91/at91sam9260_devices.c b/arch/arm/mach-at91/at91sam9260_devices.c
index 3091bf47d8c9..1533556fb873 100644
--- a/arch/arm/mach-at91/at91sam9260_devices.c
+++ b/arch/arm/mach-at91/at91sam9260_devices.c
@@ -539,6 +539,51 @@ 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 at91sam9260_rtt_device = {
+	.name		= "at91_rtt",
+	.id		= -1,
+	.resource	= rtt_resources,
+	.num_resources	= ARRAY_SIZE(rtt_resources),
+};
+
+static void __init at91_add_device_rtt(void)
+{
+	platform_device_register(&at91sam9260_rtt_device);
+}
+
+
+/* --------------------------------------------------------------------
+ *  Watchdog
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_AT91SAM9_WATCHDOG) || defined(CONFIG_AT91SAM9_WATCHDOG_MODULE)
+static struct platform_device at91sam9260_wdt_device = {
+	.name		= "at91_wdt",
+	.id		= -1,
+	.num_resources	= 0,
+};
+
+static void __init at91_add_device_watchdog(void)
+{
+	platform_device_register(&at91sam9260_wdt_device);
+}
+#else
+static void __init at91_add_device_watchdog(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  LEDs
  * -------------------------------------------------------------------- */
 
@@ -898,6 +943,8 @@ void __init at91_add_device_serial(void) {}
  */
 static int __init at91_add_standard_devices(void)
 {
+	at91_add_device_rtt();
+	at91_add_device_watchdog();
 	return 0;
 }
 
diff --git a/arch/arm/mach-at91/at91sam9261_devices.c b/arch/arm/mach-at91/at91sam9261_devices.c
index 1d03844a607a..17f3f6a24796 100644
--- a/arch/arm/mach-at91/at91sam9261_devices.c
+++ b/arch/arm/mach-at91/at91sam9261_devices.c
@@ -551,6 +551,51 @@ void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data) {}
 
 
 /* --------------------------------------------------------------------
+ *  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 at91sam9261_rtt_device = {
+	.name		= "at91_rtt",
+	.id		= -1,
+	.resource	= rtt_resources,
+	.num_resources	= ARRAY_SIZE(rtt_resources),
+};
+
+static void __init at91_add_device_rtt(void)
+{
+	platform_device_register(&at91sam9261_rtt_device);
+}
+
+
+/* --------------------------------------------------------------------
+ *  Watchdog
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_AT91SAM9_WATCHDOG) || defined(CONFIG_AT91SAM9_WATCHDOG_MODULE)
+static struct platform_device at91sam9261_wdt_device = {
+	.name		= "at91_wdt",
+	.id		= -1,
+	.num_resources	= 0,
+};
+
+static void __init at91_add_device_watchdog(void)
+{
+	platform_device_register(&at91sam9261_wdt_device);
+}
+#else
+static void __init at91_add_device_watchdog(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  LEDs
  * -------------------------------------------------------------------- */
 
@@ -786,6 +831,8 @@ void __init at91_add_device_serial(void) {}
  */
 static int __init at91_add_standard_devices(void)
 {
+	at91_add_device_rtt();
+	at91_add_device_watchdog();
 	return 0;
 }
 
diff --git a/arch/arm/mach-at91/at91sam9263_devices.c b/arch/arm/mach-at91/at91sam9263_devices.c
index d50a8dfb916d..b4eb21769db9 100644
--- a/arch/arm/mach-at91/at91sam9263_devices.c
+++ b/arch/arm/mach-at91/at91sam9263_devices.c
@@ -782,6 +782,67 @@ void __init at91_add_device_isi(void) {}
 
 
 /* --------------------------------------------------------------------
+ *  RTT
+ * -------------------------------------------------------------------- */
+
+static struct resource rtt0_resources[] = {
+	{
+		.start	= AT91_BASE_SYS + AT91_RTT0,
+		.end	= AT91_BASE_SYS + AT91_RTT0 + SZ_16 - 1,
+		.flags	= IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device at91sam9263_rtt0_device = {
+	.name		= "at91_rtt",
+	.id		= 0,
+	.resource	= rtt0_resources,
+	.num_resources	= ARRAY_SIZE(rtt0_resources),
+};
+
+static struct resource rtt1_resources[] = {
+	{
+		.start	= AT91_BASE_SYS + AT91_RTT1,
+		.end	= AT91_BASE_SYS + AT91_RTT1 + SZ_16 - 1,
+		.flags	= IORESOURCE_MEM,
+	}
+};
+
+static struct platform_device at91sam9263_rtt1_device = {
+	.name		= "at91_rtt",
+	.id		= 1,
+	.resource	= rtt1_resources,
+	.num_resources	= ARRAY_SIZE(rtt1_resources),
+};
+
+static void __init at91_add_device_rtt(void)
+{
+	platform_device_register(&at91sam9263_rtt0_device);
+	platform_device_register(&at91sam9263_rtt1_device);
+}
+
+
+/* --------------------------------------------------------------------
+ *  Watchdog
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_AT91SAM9_WATCHDOG) || defined(CONFIG_AT91SAM9_WATCHDOG_MODULE)
+static struct platform_device at91sam9263_wdt_device = {
+	.name		= "at91_wdt",
+	.id		= -1,
+	.num_resources	= 0,
+};
+
+static void __init at91_add_device_watchdog(void)
+{
+	platform_device_register(&at91sam9263_wdt_device);
+}
+#else
+static void __init at91_add_device_watchdog(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  LEDs
  * -------------------------------------------------------------------- */
 
@@ -1021,6 +1082,8 @@ void __init at91_add_device_serial(void) {}
  */
 static int __init at91_add_standard_devices(void)
 {
+	at91_add_device_rtt();
+	at91_add_device_watchdog();
 	return 0;
 }
 
diff --git a/arch/arm/mach-at91/at91sam9rl_devices.c b/arch/arm/mach-at91/at91sam9rl_devices.c
index 2bd60a3dc623..19ca71d3faab 100644
--- a/arch/arm/mach-at91/at91sam9rl_devices.c
+++ b/arch/arm/mach-at91/at91sam9rl_devices.c
@@ -384,6 +384,71 @@ void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data) {}
 
 
 /* --------------------------------------------------------------------
+ *  RTC
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_RTC_DRV_AT91RM9200) || defined(CONFIG_RTC_DRV_AT91RM9200_MODULE)
+static struct platform_device at91sam9rl_rtc_device = {
+	.name		= "at91_rtc",
+	.id		= -1,
+	.num_resources	= 0,
+};
+
+static void __init at91_add_device_rtc(void)
+{
+	platform_device_register(&at91sam9rl_rtc_device);
+}
+#else
+static void __init at91_add_device_rtc(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
+ *  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 at91sam9rl_rtt_device = {
+	.name		= "at91_rtt",
+	.id		= -1,
+	.resource	= rtt_resources,
+	.num_resources	= ARRAY_SIZE(rtt_resources),
+};
+
+static void __init at91_add_device_rtt(void)
+{
+	platform_device_register(&at91sam9rl_rtt_device);
+}
+
+
+/* --------------------------------------------------------------------
+ *  Watchdog
+ * -------------------------------------------------------------------- */
+
+#if defined(CONFIG_AT91SAM9_WATCHDOG) || defined(CONFIG_AT91SAM9_WATCHDOG_MODULE)
+static struct platform_device at91sam9rl_wdt_device = {
+	.name		= "at91_wdt",
+	.id		= -1,
+	.num_resources	= 0,
+};
+
+static void __init at91_add_device_watchdog(void)
+{
+	platform_device_register(&at91sam9rl_wdt_device);
+}
+#else
+static void __init at91_add_device_watchdog(void) {}
+#endif
+
+
+/* --------------------------------------------------------------------
  *  LEDs
  * -------------------------------------------------------------------- */
 
@@ -659,6 +724,9 @@ void __init at91_add_device_serial(void) {}
  */
 static int __init at91_add_standard_devices(void)
 {
+	at91_add_device_rtc();
+	at91_add_device_rtt();
+	at91_add_device_watchdog();
 	return 0;
 }
 
diff --git a/include/asm-arm/arch-at91/at91_rtt.h b/include/asm-arm/arch-at91/at91_rtt.h
index bae1103fbbb2..39a32633b275 100644
--- a/include/asm-arm/arch-at91/at91_rtt.h
+++ b/include/asm-arm/arch-at91/at91_rtt.h
@@ -13,19 +13,19 @@
 #ifndef AT91_RTT_H
 #define AT91_RTT_H
 
-#define AT91_RTT_MR		(AT91_RTT + 0x00)	/* Real-time Mode Register */
+#define AT91_RTT_MR		0x00			/* Real-time Mode Register */
 #define		AT91_RTT_RTPRES		(0xffff << 0)		/* Real-time Timer Prescaler Value */
 #define		AT91_RTT_ALMIEN		(1 << 16)		/* Alarm Interrupt Enable */
 #define		AT91_RTT_RTTINCIEN	(1 << 17)		/* Real Time Timer Increment Interrupt Enable */
 #define		AT91_RTT_RTTRST		(1 << 18)		/* Real Time Timer Restart */
 
-#define AT91_RTT_AR		(AT91_RTT + 0x04)	/* Real-time Alarm Register */
+#define AT91_RTT_AR		0x04			/* Real-time Alarm Register */
 #define		AT91_RTT_ALMV		(0xffffffff)		/* Alarm Value */
 
-#define AT91_RTT_VR		(AT91_RTT + 0x08)	/* Real-time Value Register */
+#define AT91_RTT_VR		0x08			/* Real-time Value Register */
 #define		AT91_RTT_CRTV		(0xffffffff)		/* Current Real-time Value */
 
-#define AT91_RTT_SR		(AT91_RTT + 0x0c)	/* Real-time Status Register */
+#define AT91_RTT_SR		0x0c			/* Real-time Status Register */
 #define		AT91_RTT_ALMS		(1 << 0)		/* Real-time Alarm Status */
 #define		AT91_RTT_RTTINC		(1 << 1)		/* Real-time Timer Increment */