linux-kernel - [PATCH v7 7/8] Loongson: YeeLoong: add suspend support

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Message-Id: <1811181c553c2c8e7e841540e57444e54c33d65f.1259932036.git.wuzhangjin@gmail.com>
Date:	Fri,  4 Dec 2009 21:37:41 +0800
From:	Wu Zhangjin <wuzhangjin@...il.com>
To:	Ralf Baechle <ralf@...ux-mips.org>, akpm@...ux-foundation.org,
	linux-mips@...ux-mips.org, linux-kernel@...r.kernel.org
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Pavel Machek <pavel@....cz>, "Rafael J. Wysocki" <rjw@...k.pl>,
	zhangfx@...ote.com, linux-laptop@...r.kernel.org,
	Wu Zhangjin <wuzhangjin@...il.com>
Subject: [PATCH v7 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 |   41 +++++++++++++++++++++++++++++++
 1 files changed, 41 insertions(+), 0 deletions(-)

diff --git a/drivers/platform/mips/yeeloong_laptop.c b/drivers/platform/mips/yeeloong_laptop.c
index 8378926..d31824b 100644
--- a/drivers/platform/mips/yeeloong_laptop.c
+++ b/drivers/platform/mips/yeeloong_laptop.c
@@ -536,6 +536,45 @@ static void yeeloong_vo_exit(void)
 	}
 }
 
+#ifdef CONFIG_LOONGSON_SUSPEND
+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 platform_device *dev, pm_message_t state)
+
+{
+	/* Turn off LCD */
+	yeeloong_lcd_vo_set(BIT_DISPLAY_LCD_OFF);
+	/* Turn off CRT */
+	yeeloong_crt_vo_set(BIT_CRT_DETECT_UNPLUG);
+	/* Poweroff three usb ports */
+	usb_ports_set(BIT_USB_FLAG_OFF);
+
+	return 0;
+}
+
+static int yeeloong_resume(struct platform_device *pdev)
+{
+	/* Resume the status of lcd & crt */
+	yeeloong_lcd_vo_set(BIT_DISPLAY_LCD_ON);
+	yeeloong_crt_vo_set(BIT_CRT_DETECT_PLUG);
+
+	/* Poweron three usb ports */
+	usb_ports_set(BIT_USB_FLAG_ON);
+
+	return 0;
+}
+#else	/* !CONFIG_LOONGSON_SUSPEND */
+#define yeeloong_suspend NULL
+#define yeeloong_resume NULL
+#endif
+
 static struct platform_device_id platform_device_ids[] = {
 	{
 		.name = "yeeloong_laptop",
@@ -551,6 +590,8 @@ static struct platform_driver platform_driver = {
 		   .owner = THIS_MODULE,
 		   },
 	.id_table = platform_device_ids,
+	.suspend = yeeloong_suspend,
+	.resume = yeeloong_resume,
 };
 
 static int __init yeeloong_init(void)
-- 
1.6.2.1

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