Re: [PATCH v4 0/4] OF phandle nexus support + GPIO nexus
On Fri, Aug 11, 2017 at 10:42 AM, Stephen Boydwrote: > This is a continutation of my phandle remapping/nexus node series > from a while ago. I finally got around to writing the documentation > in the spec for this, but it's really rough around the edges and > could use some review/suggestions to get it into shape. Please > review! > > This is one small chunk of work related to DT overlays for expansion > boards. It would be good to have a way to expose #-cells types of > providers through a connector in a standard way. So we introduce a way > to make "nexus" nodes for these types of properties to remap the consumer > number space to the other side of the connector's number space. It's > basically a copy of the interrupt nexus implementation, but without > the address space matching design and interrupt-parent walking. This generally looks good to me. I'm inclined to merge the kernel parts now and sort the spec addition out afterwards. With no users yet, we can still tweak things if needed. I would like to see more comments on this though. Perhaps "OF phandle nexus" is too obscure. Maybe "Add DT overlay connector bindings" would trick some people in looking at it... Rob
Re: [PATCH v4 0/4] OF phandle nexus support + GPIO nexus
On Fri, Aug 11, 2017 at 10:42 AM, Stephen Boyd wrote: > This is a continutation of my phandle remapping/nexus node series > from a while ago. I finally got around to writing the documentation > in the spec for this, but it's really rough around the edges and > could use some review/suggestions to get it into shape. Please > review! > > This is one small chunk of work related to DT overlays for expansion > boards. It would be good to have a way to expose #-cells types of > providers through a connector in a standard way. So we introduce a way > to make "nexus" nodes for these types of properties to remap the consumer > number space to the other side of the connector's number space. It's > basically a copy of the interrupt nexus implementation, but without > the address space matching design and interrupt-parent walking. This generally looks good to me. I'm inclined to merge the kernel parts now and sort the spec addition out afterwards. With no users yet, we can still tweak things if needed. I would like to see more comments on this though. Perhaps "OF phandle nexus" is too obscure. Maybe "Add DT overlay connector bindings" would trick some people in looking at it... Rob
[PATCH v4 0/4] OF phandle nexus support + GPIO nexus
This is a continutation of my phandle remapping/nexus node series from a while ago. I finally got around to writing the documentation in the spec for this, but it's really rough around the edges and could use some review/suggestions to get it into shape. Please review! This is one small chunk of work related to DT overlays for expansion boards. It would be good to have a way to expose #-cells types of providers through a connector in a standard way. So we introduce a way to make "nexus" nodes for these types of properties to remap the consumer number space to the other side of the connector's number space. It's basically a copy of the interrupt nexus implementation, but without the address space matching design and interrupt-parent walking. Changes since v3: * Added devicetree spec patch * Rebased to v4.13-rc1 Changes since v2: * Picked up Linus' ack on the gpio core patch * Made const stack arrays static (Rob Herring) * Used of_property_read_u32() instead of open coding (Rob Herring) Changes since v1: * Addition of optional pass-thru parameter * Reduction of strings passed to 1 instead of 3 (or 4 now) * Updated gpio patch for the new function signature * Updated test-case for new funciton signature and pass-thru parameter * Updated kernel-doc to be correct and highlighted difference between this API and of_parse_phandle_with_args() Stephen Boyd (3): Document nexus nodes/specifier remapping of: Support parsing phandle argument lists through a nexus node of: unittest: Add phandle remapping test gpio: Support gpio nexus dt bindings Kernel: drivers/gpio/gpiolib-of.c | 4 +- drivers/of/base.c | 184 drivers/of/unittest-data/testcases.dts | 11 ++ drivers/of/unittest-data/tests-phandle.dtsi | 25 drivers/of/unittest.c | 120 ++ include/linux/of.h | 12 ++ 6 files changed, 354 insertions(+), 2 deletions(-) Spec: source/devicetree-basics.rst | 208 +++ 1 file changed, 208 insertions(+) -- 2.7.4
[PATCH v4 0/4] OF phandle nexus support + GPIO nexus
This is a continutation of my phandle remapping/nexus node series from a while ago. I finally got around to writing the documentation in the spec for this, but it's really rough around the edges and could use some review/suggestions to get it into shape. Please review! This is one small chunk of work related to DT overlays for expansion boards. It would be good to have a way to expose #-cells types of providers through a connector in a standard way. So we introduce a way to make "nexus" nodes for these types of properties to remap the consumer number space to the other side of the connector's number space. It's basically a copy of the interrupt nexus implementation, but without the address space matching design and interrupt-parent walking. Changes since v3: * Added devicetree spec patch * Rebased to v4.13-rc1 Changes since v2: * Picked up Linus' ack on the gpio core patch * Made const stack arrays static (Rob Herring) * Used of_property_read_u32() instead of open coding (Rob Herring) Changes since v1: * Addition of optional pass-thru parameter * Reduction of strings passed to 1 instead of 3 (or 4 now) * Updated gpio patch for the new function signature * Updated test-case for new funciton signature and pass-thru parameter * Updated kernel-doc to be correct and highlighted difference between this API and of_parse_phandle_with_args() Stephen Boyd (3): Document nexus nodes/specifier remapping of: Support parsing phandle argument lists through a nexus node of: unittest: Add phandle remapping test gpio: Support gpio nexus dt bindings Kernel: drivers/gpio/gpiolib-of.c | 4 +- drivers/of/base.c | 184 drivers/of/unittest-data/testcases.dts | 11 ++ drivers/of/unittest-data/tests-phandle.dtsi | 25 drivers/of/unittest.c | 120 ++ include/linux/of.h | 12 ++ 6 files changed, 354 insertions(+), 2 deletions(-) Spec: source/devicetree-basics.rst | 208 +++ 1 file changed, 208 insertions(+) -- 2.7.4