| Message ID | 1486966298-16767-2-git-send-email-leo.yan@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Mon, Feb 13, 2017 at 02:11:36PM +0800, Leo Yan wrote: > Adding compatible string for new coresight debug driver. Please give a more thorough description of the hardware this binding this is intended to describe. It's not entirely clear which component this binding is intended to describe. Thanks, Mark. > Signed-off-by: Leo Yan <leo.yan@linaro.org> > --- > Documentation/devicetree/bindings/arm/coresight.txt | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt > index fcbae6a..3ff15fd 100644 > --- a/Documentation/devicetree/bindings/arm/coresight.txt > +++ b/Documentation/devicetree/bindings/arm/coresight.txt > @@ -40,6 +40,9 @@ its hardware characteristcs. > - System Trace Macrocell: > "arm,coresight-stm", "arm,primecell"; [1] > > + - Debug Unit: > + "arm,coresight-debug", "arm,primecell"; > + > * reg: physical base address and length of the register > set(s) of the component. > > @@ -78,8 +81,10 @@ its hardware characteristcs. > * arm,cp14: must be present if the system accesses ETM/PTM management > registers via co-processor 14. > > - * cpu: the cpu phandle this ETM/PTM is affined to. When omitted the > - source is considered to belong to CPU0. > +* Optional properties for ETM/PTM/Debugs: > + > + * cpu: the cpu phandle this ETM/PTM/Debug is affined to. When omitted > + the source is considered to belong to CPU0. > > * Optional property for TMC: > > -- > 2.7.4 >
On Mon, Feb 13, 2017 at 02:11:36PM +0800, Leo Yan wrote: > Adding compatible string for new coresight debug driver. > Hi Leo, I agree with Mark, this will need a better description. > Signed-off-by: Leo Yan <leo.yan@linaro.org> > --- > Documentation/devicetree/bindings/arm/coresight.txt | 9 +++++++-- > 1 file changed, 7 insertions(+), 2 deletions(-) > > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt > index fcbae6a..3ff15fd 100644 > --- a/Documentation/devicetree/bindings/arm/coresight.txt > +++ b/Documentation/devicetree/bindings/arm/coresight.txt > @@ -40,6 +40,9 @@ its hardware characteristcs. > - System Trace Macrocell: > "arm,coresight-stm", "arm,primecell"; [1] > > + - Debug Unit: > + "arm,coresight-debug", "arm,primecell"; > + Humm... The current CoreSight bindings are meant to describe IPs included in the HW assisted trace architecture. This new driver, althought considered to be part of the CoreSight umbrella, falls under the debugging domain. Adding the bindings in this file may lead people to beleive this driver fits into the CoreSight framework currently supported, which isn't the case. As such it is probably a good idea to spin off a new file, "coresight-debug.txt" to handle this driver. Mark, what's your take on this? > * reg: physical base address and length of the register > set(s) of the component. > > @@ -78,8 +81,10 @@ its hardware characteristcs. > * arm,cp14: must be present if the system accesses ETM/PTM management > registers via co-processor 14. > > - * cpu: the cpu phandle this ETM/PTM is affined to. When omitted the > - source is considered to belong to CPU0. > +* Optional properties for ETM/PTM/Debugs: > + > + * cpu: the cpu phandle this ETM/PTM/Debug is affined to. When omitted > + the source is considered to belong to CPU0. > > * Optional property for TMC: > > -- > 2.7.4 >
On Wed, Feb 15, 2017 at 01:08:58PM -0700, Mathieu Poirier wrote: > On Mon, Feb 13, 2017 at 02:11:36PM +0800, Leo Yan wrote: > > Adding compatible string for new coresight debug driver. > > > > Hi Leo, > > I agree with Mark, this will need a better description. > > > Signed-off-by: Leo Yan <leo.yan@linaro.org> > > --- > > Documentation/devicetree/bindings/arm/coresight.txt | 9 +++++++-- > > 1 file changed, 7 insertions(+), 2 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt > > index fcbae6a..3ff15fd 100644 > > --- a/Documentation/devicetree/bindings/arm/coresight.txt > > +++ b/Documentation/devicetree/bindings/arm/coresight.txt > > @@ -40,6 +40,9 @@ its hardware characteristcs. > > - System Trace Macrocell: > > "arm,coresight-stm", "arm,primecell"; [1] > > > > + - Debug Unit: > > + "arm,coresight-debug", "arm,primecell"; > > + > > Humm... The current CoreSight bindings are meant to describe IPs included in > the HW assisted trace architecture. This new driver, althought considered to be > part of the CoreSight umbrella, falls under the debugging domain. > > Adding the bindings in this file may lead people to beleive this driver fits > into the CoreSight framework currently supported, which isn't the case. > > As such it is probably a good idea to spin off a new file, "coresight-debug.txt" > to handle this driver. I think this is good suggestion; if Mark has no objection, I will follow up it. > Mark, what's your take on this? > > > * reg: physical base address and length of the register > > set(s) of the component. > > > > @@ -78,8 +81,10 @@ its hardware characteristcs. > > * arm,cp14: must be present if the system accesses ETM/PTM management > > registers via co-processor 14. > > > > - * cpu: the cpu phandle this ETM/PTM is affined to. When omitted the > > - source is considered to belong to CPU0. > > +* Optional properties for ETM/PTM/Debugs: > > + > > + * cpu: the cpu phandle this ETM/PTM/Debug is affined to. When omitted > > + the source is considered to belong to CPU0. > > > > * Optional property for TMC: > > > > -- > > 2.7.4 > >
diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt index fcbae6a..3ff15fd 100644 --- a/Documentation/devicetree/bindings/arm/coresight.txt +++ b/Documentation/devicetree/bindings/arm/coresight.txt @@ -40,6 +40,9 @@ its hardware characteristcs. - System Trace Macrocell: "arm,coresight-stm", "arm,primecell"; [1] + - Debug Unit: + "arm,coresight-debug", "arm,primecell"; + * reg: physical base address and length of the register set(s) of the component. @@ -78,8 +81,10 @@ its hardware characteristcs. * arm,cp14: must be present if the system accesses ETM/PTM management registers via co-processor 14. - * cpu: the cpu phandle this ETM/PTM is affined to. When omitted the - source is considered to belong to CPU0. +* Optional properties for ETM/PTM/Debugs: + + * cpu: the cpu phandle this ETM/PTM/Debug is affined to. When omitted + the source is considered to belong to CPU0. * Optional property for TMC:
Adding compatible string for new coresight debug driver. Signed-off-by: Leo Yan <leo.yan@linaro.org> --- Documentation/devicetree/bindings/arm/coresight.txt | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)