| Message ID | 20190809222057.13924-1-s-anna@ti.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | remoteproc: Add a sysfs interface for name | expand |
Hi Suman, Acked-by:Arnaud POULIQUEN <arnaud.pouliquen@st.com> Thanks, Arnaud On 8/10/19 12:20 AM, Suman Anna wrote: > This patch adds a sysfs interface that provides the name of the > remote processor to userspace. This allows the userspace to identify > a remote processor as the remoteproc devices themselves are created > based on probe order and can change from one boot to another or > at runtime. > > The name is made available in debugfs originally, and is being > retained for now. This can be cleaned up after couple of releases > once users get familiar with the new interface. > > Signed-off-by: Suman Anna <s-anna@ti.com> > --- > Documentation/ABI/testing/sysfs-class-remoteproc | 10 ++++++++++ > drivers/remoteproc/remoteproc_sysfs.c | 11 +++++++++++ > 2 files changed, 21 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-class-remoteproc b/Documentation/ABI/testing/sysfs-class-remoteproc > index c3afe9fab646..36094fbeb974 100644 > --- a/Documentation/ABI/testing/sysfs-class-remoteproc > +++ b/Documentation/ABI/testing/sysfs-class-remoteproc > @@ -48,3 +48,13 @@ Description: Remote processor state > > Writing "stop" will attempt to halt the remote processor and > return it to the "offline" state. > + > +What: /sys/class/remoteproc/.../name > +Date: August 2019 > +KernelVersion: 5.4 > +Contact: Suman Anna <s-anna@ti.com> > +Description: Remote processor name > + > + Reports the name of the remote processor. This can be used by > + userspace in exactly identifying a remote processor and ease > + up the usage in modifying the 'firmware' or 'state' files. > diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c > index fa4131930106..7f8536b73295 100644 > --- a/drivers/remoteproc/remoteproc_sysfs.c > +++ b/drivers/remoteproc/remoteproc_sysfs.c > @@ -113,9 +113,20 @@ static ssize_t state_store(struct device *dev, > } > static DEVICE_ATTR_RW(state); > > +/* Expose the name of the remote processor via sysfs */ > +static ssize_t name_show(struct device *dev, struct device_attribute *attr, > + char *buf) > +{ > + struct rproc *rproc = to_rproc(dev); > + > + return sprintf(buf, "%s\n", rproc->name); > +} > +static DEVICE_ATTR_RO(name); > + > static struct attribute *rproc_attrs[] = { > &dev_attr_firmware.attr, > &dev_attr_state.attr, > + &dev_attr_name.attr, > NULL > }; > >
diff --git a/Documentation/ABI/testing/sysfs-class-remoteproc b/Documentation/ABI/testing/sysfs-class-remoteproc index c3afe9fab646..36094fbeb974 100644 --- a/Documentation/ABI/testing/sysfs-class-remoteproc +++ b/Documentation/ABI/testing/sysfs-class-remoteproc @@ -48,3 +48,13 @@ Description: Remote processor state Writing "stop" will attempt to halt the remote processor and return it to the "offline" state. + +What: /sys/class/remoteproc/.../name +Date: August 2019 +KernelVersion: 5.4 +Contact: Suman Anna <s-anna@ti.com> +Description: Remote processor name + + Reports the name of the remote processor. This can be used by + userspace in exactly identifying a remote processor and ease + up the usage in modifying the 'firmware' or 'state' files. diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c index fa4131930106..7f8536b73295 100644 --- a/drivers/remoteproc/remoteproc_sysfs.c +++ b/drivers/remoteproc/remoteproc_sysfs.c @@ -113,9 +113,20 @@ static ssize_t state_store(struct device *dev, } static DEVICE_ATTR_RW(state); +/* Expose the name of the remote processor via sysfs */ +static ssize_t name_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct rproc *rproc = to_rproc(dev); + + return sprintf(buf, "%s\n", rproc->name); +} +static DEVICE_ATTR_RO(name); + static struct attribute *rproc_attrs[] = { &dev_attr_firmware.attr, &dev_attr_state.attr, + &dev_attr_name.attr, NULL };
This patch adds a sysfs interface that provides the name of the remote processor to userspace. This allows the userspace to identify a remote processor as the remoteproc devices themselves are created based on probe order and can change from one boot to another or at runtime. The name is made available in debugfs originally, and is being retained for now. This can be cleaned up after couple of releases once users get familiar with the new interface. Signed-off-by: Suman Anna <s-anna@ti.com> --- Documentation/ABI/testing/sysfs-class-remoteproc | 10 ++++++++++ drivers/remoteproc/remoteproc_sysfs.c | 11 +++++++++++ 2 files changed, 21 insertions(+)