[PATCH 6/9] Loongson: YeeLoong: add suspend support

[Wu Zhangjin <wuzhangjin@gmail.com>]

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

Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
---
 drivers/platform/mips/yeeloong_laptop.c |   41 ++++++++++++++++++++++++++++--
 1 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/drivers/platform/mips/yeeloong_laptop.c 
b/drivers/platform/mips/yeeloong_laptop.c
index 9fd70ae..16e34e8 100644
--- a/drivers/platform/mips/yeeloong_laptop.c
+++ b/drivers/platform/mips/yeeloong_laptop.c
@@ -454,6 +454,38 @@ 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)
+{
+       usb_ports_set(BIT_USB_FLAG_ON);
+       yeeloong_crt_vo_set(BIT_CRT_DETECT_PLUG);
+       yeeloong_lcd_vo_set(BIT_DISPLAY_LCD_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",
@@ -465,9 +497,12 @@ 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,
 };
 
-- 
1.7.0.4