linux-kernel - [PATCH v9 7/8] Loongson: YeeLoong: add suspend support

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Date:	Tue,  8 Dec 2009 22:15:55 +0800
From:	Wu Zhangjin <wuzhangjin@...il.com>
To:	Ralf Baechle <ralf@...ux-mips.org>
Cc:	akpm@...ux-foundation.org, Wu Zhangjin <wuzhangjin@...il.com>,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	"Rafael J . Wysocki" <rjw@...k.pl>, zhangfx@...ote.com,
	linux-laptop@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Pavel Machek <pavel@....cz>
Subject: [PATCH v9 7/8] Loongson: YeeLoong: add suspend support

From: Wu Zhangjin <wuzhangjin@...il.com>

This patch add support to suspend the yeeloong platform specific
devices(LCD, CRT, USB...).

Acked-by: Rafael J. Wysocki <rjw@...k.pl>
Acked-by: Pavel Machek <pavel@....cz>
Signed-off-by: Wu Zhangjin <wuzhangjin@...il.com>
---
 drivers/platform/mips/yeeloong_laptop.c |   42 ++++++++++++++++++++++++++++--
 1 files changed, 39 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/mips/yeeloong_laptop.c b/drivers/platform/mips/yeeloong_laptop.c
index f8907da..baf3e81 100644
--- a/drivers/platform/mips/yeeloong_laptop.c
+++ b/drivers/platform/mips/yeeloong_laptop.c
@@ -512,6 +512,39 @@ static void yeeloong_vo_exit(void)
 	}
 }
 
+#ifdef CONFIG_PM
+static void usb_ports_set(int status)
+{
+	status = !!status;
+
+	ec_write(REG_USB0_FLAG, status);
+	ec_write(REG_USB1_FLAG, status);
+	ec_write(REG_USB2_FLAG, status);
+}
+
+static int yeeloong_suspend(struct device *dev)
+
+{
+	yeeloong_lcd_vo_set(BIT_DISPLAY_LCD_OFF);
+	yeeloong_crt_vo_set(BIT_CRT_DETECT_UNPLUG);
+	usb_ports_set(BIT_USB_FLAG_OFF);
+
+	return 0;
+}
+
+static int yeeloong_resume(struct device *dev)
+{
+	yeeloong_lcd_vo_set(BIT_DISPLAY_LCD_ON);
+	yeeloong_crt_vo_set(BIT_CRT_DETECT_PLUG);
+	usb_ports_set(BIT_USB_FLAG_ON);
+
+	return 0;
+}
+
+static const SIMPLE_DEV_PM_OPS(yeeloong_pm_ops, yeeloong_suspend,
+	yeeloong_resume);
+#endif
+
 static struct platform_device_id platform_device_ids[] = {
 	{
 		.name = "yeeloong_laptop",
@@ -523,9 +556,12 @@ MODULE_DEVICE_TABLE(platform, platform_device_ids);
 
 static struct platform_driver platform_driver = {
 	.driver = {
-		   .name = "yeeloong_laptop",
-		   .owner = THIS_MODULE,
-		   },
+		.name = "yeeloong_laptop",
+		.owner = THIS_MODULE,
+#ifdef CONFIG_PM
+		.pm = &yeeloong_pm_ops,
+#endif
+	},
 	.id_table = platform_device_ids,
 };
 
-- 
1.6.2.1

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