summaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-msm/proc_comm.c
diff options
context:
space:
mode:
authorDaniel Walker <c_dwalke@quicinc.com>2010-03-18 12:31:08 -0700
committerDaniel Walker <dwalker@codeaurora.org>2010-05-12 09:19:33 -0700
commit0aec66d493c1476daa88ec56b1076e51f1ceff0b (patch)
treefed44f8a6e89719dba16dd5a22978368c28394c9 /arch/arm/mach-msm/proc_comm.c
parentb13525c2637957a757709945fbc9bc8b1065d071 (diff)
downloadlinux-0aec66d493c1476daa88ec56b1076e51f1ceff0b.tar.bz2
arm: msm: smd: fix SMD modem processor sync condition
When booting up we need to wait for the modem processor to partially boot. This is because the modem processor does resource allocation for us. If we don't wait the modem won't honor our requests and we end up crashing or in an unknown state. This change just formalizes the waiting process. Signed-off-by: Daniel Walker <c_dwalke@quicinc.com>
Diffstat (limited to 'arch/arm/mach-msm/proc_comm.c')
-rw-r--r--arch/arm/mach-msm/proc_comm.c15
1 files changed, 14 insertions, 1 deletions
diff --git a/arch/arm/mach-msm/proc_comm.c b/arch/arm/mach-msm/proc_comm.c
index 1cbdebf57c37..67e701c7f183 100644
--- a/arch/arm/mach-msm/proc_comm.c
+++ b/arch/arm/mach-msm/proc_comm.c
@@ -114,4 +114,17 @@ int msm_proc_comm(unsigned cmd, unsigned *data1, unsigned *data2)
return ret;
}
-
+/*
+ * We need to wait for the ARM9 to at least partially boot
+ * up before we can continue. Since the ARM9 does resource
+ * allocation, if we dont' wait we could end up crashing or in
+ * and unknown state. This function should be called early to
+ * wait on the ARM9.
+ */
+void __init proc_comm_boot_wait(void)
+{
+ void __iomem *base = MSM_SHARED_RAM_BASE;
+
+ proc_comm_wait_for(base + MDM_STATUS, PCOM_READY);
+
+}