aboutsummaryrefslogtreecommitdiff
path: root/arch
diff options
context:
space:
mode:
authorKumar Sanghvi <kumar.sanghvi@stericsson.com>2010-05-31 15:44:57 +0530
committerJohn Rigby <john.rigby@linaro.org>2010-09-02 22:45:30 -0600
commit306226edac0248ac35eccea0a0e6d37c78a81b90 (patch)
treeec94beaafe3c5b92a00f96305ccc8f2fe10b14fe /arch
parent7fb4b4344dcbfd8115bcf075c7f07c748d2a7ef1 (diff)
downloadlinux-2.6.34-ux500-306226edac0248ac35eccea0a0e6d37c78a81b90.tar.gz
u8500-prcmu: Avoid setting PRCM_HOSTACCESS_REQ if already set
Avoids setting the PRCM_HOSTACCESS_REQ if alredy set. Setting the bit again, when already set, will not give HOST_PORT_ACK interrupt from prcmu-fw. ST-Ericsson ID: ER262435 Signed-off-by: Kumar Sanghvi <kumar.sanghvi@stericsson.com> Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/534 Reviewed-by: Biju C DAS <biju.das@stericsson.com> Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com> Tested-by: Jonas ABERG <jonas.aberg@stericsson.com> Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> Change-Id: I3f484cf5a04f141767d218e1f8a15f03800263b6 Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/2380
Diffstat (limited to 'arch')
-rwxr-xr-xarch/arm/mach-ux500/prcmu-fw.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mach-ux500/prcmu-fw.c b/arch/arm/mach-ux500/prcmu-fw.c
index 0c6f50f8b79..ed8274a5678 100755
--- a/arch/arm/mach-ux500/prcmu-fw.c
+++ b/arch/arm/mach-ux500/prcmu-fw.c
@@ -1102,6 +1102,16 @@ int prcmu_ac_wake_req()
spin_lock_irqsave(&ac_wake_lock, flags);
prcm_hostaccess = readl(PRCM_HOSTACCESS_REQ);
+
+ /*
+ * check if the prcm_hostaccess_req is already high.
+ * If yes, then simply return
+ */
+ if (prcm_hostaccess & ARM_WAKEUP_MODEM) {
+ spin_unlock_irqrestore(&ac_wake_lock, flags);
+ return 0;
+ }
+
prcm_hostaccess = prcm_hostaccess | ARM_WAKEUP_MODEM;
/* write to the PRCMU host_port_req register */