linux-kernel - [RFC LINUX PATCH 04/19] remoteproc: sysfs: Add running independent state

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Date:   Fri, 24 Mar 2017 12:22:20 -0700
From:   Wendy Liang <wendy.liang@...inx.com>
To:     <bjorn.andersson@...aro.org>
CC:     <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Wendy Liang" <wendy.liang@...inx.com>,
        Wendy Liang <jliang@...inx.com>,
        Michal Simek <michal.simek@...inx.com>
Subject: [RFC LINUX PATCH 04/19] remoteproc: sysfs: Add running independent state

From: Wendy Liang <wendy.liang@...inx.com>

Show running independent state to indicate the remote
runs and it is not started by the remoteproc driver.

Signed-off-by: Wendy Liang <jliang@...inx.com>
Signed-off-by: Michal Simek <michal.simek@...inx.com>
---
 drivers/remoteproc/remoteproc_sysfs.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
index 47be411..616057d 100644
--- a/drivers/remoteproc/remoteproc_sysfs.c
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -74,6 +74,7 @@ static ssize_t firmware_store(struct device *dev,
 	[RPROC_RUNNING]		= "running",
 	[RPROC_CRASHED]		= "crashed",
 	[RPROC_DELETED]		= "deleted",
+	[RPROC_RUNNING_INDEPENDENT] = "running_independent",
 	[RPROC_LAST]		= "invalid",
 };
 
@@ -97,14 +98,16 @@ static ssize_t state_store(struct device *dev,
 	int ret = 0;
 
 	if (sysfs_streq(buf, "start")) {
-		if (rproc->state == RPROC_RUNNING)
+		if (rproc->state == RPROC_RUNNING ||
+			rproc->state == RPROC_RUNNING_INDEPENDENT)
 			return -EBUSY;
 
 		ret = rproc_boot(rproc);
 		if (ret)
 			dev_err(&rproc->dev, "Boot failed: %d\n", ret);
 	} else if (sysfs_streq(buf, "stop")) {
-		if (rproc->state != RPROC_RUNNING)
+		if (rproc->state != RPROC_RUNNING &&
+			rproc->state != RPROC_RUNNING_INDEPENDENT)
 			return -EINVAL;
 
 		rproc_shutdown(rproc);
-- 
1.9.1