linux-kernel - [PATCH 1/8] atmel_serial: Fix build on avr32 with CONFIG

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Message-Id: <1214817676-30378-2-git-send-email-haavard.skinnemoen@atmel.com>
Date:	Mon, 30 Jun 2008 11:21:09 +0200
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	kernel@...32linux.org
Cc:	linux-kernel@...r.kernel.org,
	Haavard Skinnemoen <hskinnemoen@...el.com>,
	David Brownell <david-b@...bell.net>,
	Andrew Victor <linux@...im.org.za>
Subject: [PATCH 1/8] atmel_serial: Fix build on avr32 with CONFIG_PM enabled

From: Haavard Skinnemoen <hskinnemoen@...el.com>

AVR32 doesn't have at91_suspend_entering_slow_clock(). Just assume the
clock will keep running for now.

David has a better solution for this, but this works for now. Leaving
the USART clock running won't prevent the PM code from entering deep
power-down modes anyway.

Signed-off-by: Haavard Skinnemoen <hskinnemoen@...el.com>
Cc: David Brownell <david-b@...bell.net>
Cc: Andrew Victor <linux@...im.org.za>
---
 drivers/serial/atmel_serial.c |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

diff --git a/drivers/serial/atmel_serial.c b/drivers/serial/atmel_serial.c
index 42be8b0..5f0414f 100644
--- a/drivers/serial/atmel_serial.c
+++ b/drivers/serial/atmel_serial.c
@@ -1439,6 +1439,15 @@ static struct uart_driver atmel_uart = {
 };
 
 #ifdef CONFIG_PM
+static bool atmel_serial_clk_will_stop(void)
+{
+#ifdef CONFIG_ARCH_AT91
+	return at91_suspend_entering_slow_clock();
+#else
+	return false;
+#endif
+}
+
 static int atmel_serial_suspend(struct platform_device *pdev,
 				pm_message_t state)
 {
@@ -1446,7 +1455,7 @@ static int atmel_serial_suspend(struct platform_device *pdev,
 	struct atmel_uart_port *atmel_port = to_atmel_uart_port(port);
 
 	if (device_may_wakeup(&pdev->dev)
-	    && !at91_suspend_entering_slow_clock())
+	    && !atmel_serial_clk_will_stop())
 		enable_irq_wake(port->irq);
 	else {
 		uart_suspend_port(&atmel_uart, port);
-- 
1.5.5.4

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