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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2018-06-15 12:59:39 +0300
committerBjorn Andersson <bjorn.andersson@linaro.org>2018-07-31 09:32:03 +0300
commitfe782affd0f440a4e60e2cc81b8f2eccb2923113 (patch)
treed6a2717a0c24066ac9bae52531215831d48723e6 /drivers/rpmsg
parent82eca590cf5bf6eb1d1f2a282f5eb0f80ec0e57c (diff)
downloadlinux-fe782affd0f440a4e60e2cc81b8f2eccb2923113.tar.xz
rpmsg: core: add support to power domains for devices
Some of the rpmsg devices need to switch on power domains to communicate with remote processor. For example on Qualcomm DB820c platform LPASS power domain needs to switched on for any kind of audio services. This patch adds the missing power domain support in rpmsg core. Without this patch attempting to play audio via QDSP on DB820c would reboot the system. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/rpmsg')
-rw-r--r--drivers/rpmsg/rpmsg_core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/rpmsg/rpmsg_core.c b/drivers/rpmsg/rpmsg_core.c
index b714a543a91d..8122807db380 100644
--- a/drivers/rpmsg/rpmsg_core.c
+++ b/drivers/rpmsg/rpmsg_core.c
@@ -15,6 +15,7 @@
#include <linux/module.h>
#include <linux/rpmsg.h>
#include <linux/of_device.h>
+#include <linux/pm_domain.h>
#include <linux/slab.h>
#include "rpmsg_internal.h"
@@ -449,6 +450,10 @@ static int rpmsg_dev_probe(struct device *dev)
struct rpmsg_endpoint *ept = NULL;
int err;
+ err = dev_pm_domain_attach(dev, true);
+ if (err)
+ goto out;
+
if (rpdrv->callback) {
strncpy(chinfo.name, rpdev->id.name, RPMSG_NAME_SIZE);
chinfo.src = rpdev->src;
@@ -490,6 +495,8 @@ static int rpmsg_dev_remove(struct device *dev)
rpdrv->remove(rpdev);
+ dev_pm_domain_detach(dev, true);
+
if (rpdev->ept)
rpmsg_destroy_ept(rpdev->ept);