MLK-10174-2 usb: chipidea: host: keep controller power if host has dev connected

This patch is to keep usb controller power on while system suspend if there
is usb device connected by telling GPC to keep mega fast domain power.

Signed-off-by: Li Jun <jun.li@freescale.com>

diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 85febf7c0e0114ac33b3ee2c8a1c07229796800f..4bfb1d43532bfb2eb9296134fd6f20a0bb296963 100644 (file)
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -25,6 +25,7 @@
 #include <linux/usb/hcd.h>
 #include <linux/usb/chipidea.h>
 #include <linux/regulator/consumer.h>
+#include <linux/imx_gpc.h>
 
 #include "../host/ehci.h"
 
@@ -378,11 +379,16 @@ static void ci_hdrc_host_restore_from_power_lost(struct ci_hdrc *ci)
 
 static void ci_hdrc_host_suspend(struct ci_hdrc *ci)
 {
+       if (ci_hdrc_host_has_device(ci))
+               imx_gpc_mf_request_on(ci->irq, 1);
+
        ci_hdrc_host_save_for_power_lost(ci);
 }
 
 static void ci_hdrc_host_resume(struct ci_hdrc *ci, bool power_lost)
 {
+       imx_gpc_mf_request_on(ci->irq, 0);
+
        if (power_lost)
                ci_hdrc_host_restore_from_power_lost(ci);
 }