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rpmsg: core: add support to power domains for devices

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[ Upstream commit fe782affd0 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Srinivas Kandagatla
2018-06-15 10:59:39 +01:00
committed by Greg Kroah-Hartman
parent 0e890d1cf4
commit 1ed3a93072
1 changed files with 7 additions and 0 deletions
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7
drivers/rpmsg/rpmsg_core.c
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@@ -23,6 +23,7 @@
#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"
@@ -418,6 +419,10 @@ 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;
@@ -459,6 +464,8 @@ 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);