linux-kernel - [PATCH v3 5/5] rtc-at91rm9200: use shadow IMR on at91sam9x5

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Message-Id: <1369298335-24597-6-git-send-email-jhovold@gmail.com>
Date:	Thu, 23 May 2013 10:38:55 +0200
From:	Johan Hovold <jhovold@...il.com>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	Douglas Gilbert <dgilbert@...erlog.com>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Robert Nelson <Robert.Nelson@...ikey.com>,
	Johan Hovold <jhovold@...il.com>
Subject: [PATCH v3 5/5] rtc-at91rm9200: use shadow IMR on at91sam9x5

Add support for the at91sam9x5-family which must use the shadow
interrupt mask due to a hardware issue (causing RTC_IMR to always be
zero).

Signed-off-by: Johan Hovold <jhovold@...il.com>
---
 Documentation/devicetree/bindings/rtc/atmel,at91rm9200-rtc.txt | 2 +-
 arch/arm/boot/dts/at91sam9x5.dtsi                              | 2 +-
 drivers/rtc/rtc-at91rm9200.c                                   | 7 +++++++
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/atmel,at91rm9200-rtc.txt b/Documentation/devicetree/bindings/rtc/atmel,at91rm9200-rtc.txt
index 2a3feab..34c1505 100644
--- a/Documentation/devicetree/bindings/rtc/atmel,at91rm9200-rtc.txt
+++ b/Documentation/devicetree/bindings/rtc/atmel,at91rm9200-rtc.txt
@@ -1,7 +1,7 @@
 Atmel AT91RM9200 Real Time Clock
 
 Required properties:
-- compatible: should be: "atmel,at91rm9200-rtc"
+- compatible: should be: "atmel,at91rm9200-rtc" or "atmel,at91sam9x5-rtc"
 - reg: physical base address of the controller and length of memory mapped
   region.
 - interrupts: rtc alarm/event interrupt
diff --git a/arch/arm/boot/dts/at91sam9x5.dtsi b/arch/arm/boot/dts/at91sam9x5.dtsi
index 1145ac3..b5833d1f 100644
--- a/arch/arm/boot/dts/at91sam9x5.dtsi
+++ b/arch/arm/boot/dts/at91sam9x5.dtsi
@@ -643,7 +643,7 @@
 			};
 
 			rtc@...ffeb0 {
-				compatible = "atmel,at91rm9200-rtc";
+				compatible = "atmel,at91sam9x5-rtc";
 				reg = <0xfffffeb0 0x40>;
 				interrupts = <1 4 7>;
 				status = "disabled";
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 205701e..47416e9 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -309,12 +309,19 @@ static irqreturn_t at91_rtc_interrupt(int irq, void *dev_id)
 static const struct at91_rtc_config at91rm9200_config = {
 };
 
+static const struct at91_rtc_config at91sam9x5_config = {
+	.use_shadow_imr	= true,
+};
+
 #ifdef CONFIG_OF
 static const struct of_device_id at91_rtc_dt_ids[] = {
 	{
 		.compatible = "atmel,at91rm9200-rtc",
 		.data = &at91rm9200_config,
 	}, {
+		.compatible = "atmel,at91sam9x5-rtc",
+		.data = &at91sam9x5_config,
+	}, {
 		/* sentinel */
 	}
 };
-- 
1.8.2.1

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