Re: [PATCH 0/6] Introducing Device Tree Overlays
Our use case is partial reconfiguration of the FPGA. This will be driven from userspace, so the bitstream to program the FPGA will come from userspace, then the overlay for the DT, also from userspace. So we want to take a compiled partial device tree and simply 'cat' it to a point under /proc, such as 'cat new-ip.dtb /proc/device-tree' Alan Tull Altera Corp. On Thu, Feb 21, 2013 at 3:53 PM, Pantelis Antoniou pa...@antoniou-consulting.com wrote: Hi Alan, On Feb 21, 2013, at 1:25 PM, delicious quinoa wrote: I like where this is heading. I'm interested in a use case where IP can be loaded into a FPGA, then add a blob to the device tree and load some drivers. I see your github tree. If I wanted to cherry-pick your code and play around with it, which branch should I use? not-capebus-21? not-capebus-v21 is the latest one and indeed that has it in. Please note that I had some other FPGA people interested with it. Perhaps we can go through use cases to come up with your requirements Thanks, Alan Tull Altera Corp Regards -- Pantelis On Fri, Jan 4, 2013 at 1:31 PM, Pantelis Antoniou pa...@antoniou-consulting.com wrote: The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree. This patchset is against mainline as of Friday Jan 4 2013. (4956964 Merge tag 'driver-core-3.8-rc2' of \ git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core) Note that a separate patch for the DTC compiler has been posted and is required to compile the DTS files according to the documentation. The patch is dtc: Dynamic symbols fixup support An implementation patchset for a beaglebone cape loader will follow, but if you want to check out a working kernel for the beaglebone please pull from: git://github.com/pantoniou/linux-bbxm.git branch not-capebus-v8 Pantelis Antoniou (6): OF: Introduce device tree node flag helpers. OF: export of_property_notify OF: Export all DT proc update functions OF: Introduce utility helper functions OF: Introduce Device Tree resolve support. OF: Introduce DT overlay support. .../devicetree/dynamic-resolution-notes.txt| 25 + Documentation/devicetree/overlay-notes.txt | 179 + drivers/of/Kconfig | 19 + drivers/of/Makefile| 4 +- drivers/of/base.c | 114 +-- drivers/of/overlay.c | 831 + drivers/of/resolver.c | 394 ++ drivers/of/util.c | 253 +++ include/linux/of.h | 243 ++ 9 files changed, 2005 insertions(+), 57 deletions(-) create mode 100644 Documentation/devicetree/dynamic-resolution-notes.txt create mode 100644 Documentation/devicetree/overlay-notes.txt create mode 100644 drivers/of/overlay.c create mode 100644 drivers/of/resolver.c create mode 100644 drivers/of/util.c -- 1.7.12 ___ devicetree-discuss mailing list devicetree-disc...@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
I like where this is heading. I'm interested in a use case where IP can be loaded into a FPGA, then add a blob to the device tree and load some drivers. I see your github tree. If I wanted to cherry-pick your code and play around with it, which branch should I use? not-capebus-21? Thanks, Alan Tull Altera Corp On Fri, Jan 4, 2013 at 1:31 PM, Pantelis Antoniou pa...@antoniou-consulting.com wrote: The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree. This patchset is against mainline as of Friday Jan 4 2013. (4956964 Merge tag 'driver-core-3.8-rc2' of \ git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core) Note that a separate patch for the DTC compiler has been posted and is required to compile the DTS files according to the documentation. The patch is dtc: Dynamic symbols fixup support An implementation patchset for a beaglebone cape loader will follow, but if you want to check out a working kernel for the beaglebone please pull from: git://github.com/pantoniou/linux-bbxm.git branch not-capebus-v8 Pantelis Antoniou (6): OF: Introduce device tree node flag helpers. OF: export of_property_notify OF: Export all DT proc update functions OF: Introduce utility helper functions OF: Introduce Device Tree resolve support. OF: Introduce DT overlay support. .../devicetree/dynamic-resolution-notes.txt| 25 + Documentation/devicetree/overlay-notes.txt | 179 + drivers/of/Kconfig | 19 + drivers/of/Makefile| 4 +- drivers/of/base.c | 114 +-- drivers/of/overlay.c | 831 + drivers/of/resolver.c | 394 ++ drivers/of/util.c | 253 +++ include/linux/of.h | 243 ++ 9 files changed, 2005 insertions(+), 57 deletions(-) create mode 100644 Documentation/devicetree/dynamic-resolution-notes.txt create mode 100644 Documentation/devicetree/overlay-notes.txt create mode 100644 drivers/of/overlay.c create mode 100644 drivers/of/resolver.c create mode 100644 drivers/of/util.c -- 1.7.12 ___ devicetree-discuss mailing list devicetree-disc...@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
Hi Alan, On Feb 21, 2013, at 1:25 PM, delicious quinoa wrote: I like where this is heading. I'm interested in a use case where IP can be loaded into a FPGA, then add a blob to the device tree and load some drivers. I see your github tree. If I wanted to cherry-pick your code and play around with it, which branch should I use? not-capebus-21? not-capebus-v21 is the latest one and indeed that has it in. Please note that I had some other FPGA people interested with it. Perhaps we can go through use cases to come up with your requirements Thanks, Alan Tull Altera Corp Regards -- Pantelis On Fri, Jan 4, 2013 at 1:31 PM, Pantelis Antoniou pa...@antoniou-consulting.com wrote: The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree. This patchset is against mainline as of Friday Jan 4 2013. (4956964 Merge tag 'driver-core-3.8-rc2' of \ git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core) Note that a separate patch for the DTC compiler has been posted and is required to compile the DTS files according to the documentation. The patch is dtc: Dynamic symbols fixup support An implementation patchset for a beaglebone cape loader will follow, but if you want to check out a working kernel for the beaglebone please pull from: git://github.com/pantoniou/linux-bbxm.git branch not-capebus-v8 Pantelis Antoniou (6): OF: Introduce device tree node flag helpers. OF: export of_property_notify OF: Export all DT proc update functions OF: Introduce utility helper functions OF: Introduce Device Tree resolve support. OF: Introduce DT overlay support. .../devicetree/dynamic-resolution-notes.txt| 25 + Documentation/devicetree/overlay-notes.txt | 179 + drivers/of/Kconfig | 19 + drivers/of/Makefile| 4 +- drivers/of/base.c | 114 +-- drivers/of/overlay.c | 831 + drivers/of/resolver.c | 394 ++ drivers/of/util.c | 253 +++ include/linux/of.h | 243 ++ 9 files changed, 2005 insertions(+), 57 deletions(-) create mode 100644 Documentation/devicetree/dynamic-resolution-notes.txt create mode 100644 Documentation/devicetree/overlay-notes.txt create mode 100644 drivers/of/overlay.c create mode 100644 drivers/of/resolver.c create mode 100644 drivers/of/util.c -- 1.7.12 ___ devicetree-discuss mailing list devicetree-disc...@lists.ozlabs.org https://lists.ozlabs.org/listinfo/devicetree-discuss -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
On Sat, Jan 05, 2013 at 12:16:51AM -0600, Joel A Fernandes wrote: The problem being addressed is discussed in this thread: http://permalink.gmane.org/gmane.linux.kernel/1389017 Thanks for the link. Since the motivation is already documented in that post, why not add it into Documentation/devicetree/overlay-notes.txt as well? Thanks, Richard -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
Hi Richard, It should, but there are a few differences in the syntax plus the fact that I didn't write it. It should go in by a separate patch by the original author. Regards -- Pantelis Από το iPad μου 5 Ιαν 2013, 11:35 π.μ., ο/η Richard Cochran richardcoch...@gmail.com έγραψε: On Sat, Jan 05, 2013 at 12:16:51AM -0600, Joel A Fernandes wrote: The problem being addressed is discussed in this thread: http://permalink.gmane.org/gmane.linux.kernel/1389017 Thanks for the link. Since the motivation is already documented in that post, why not add it into Documentation/devicetree/overlay-notes.txt as well? Thanks, Richard -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
On 01/05/2013 03:35:58 AM, Richard Cochran wrote: On Sat, Jan 05, 2013 at 12:16:51AM -0600, Joel A Fernandes wrote: The problem being addressed is discussed in this thread: http://permalink.gmane.org/gmane.linux.kernel/1389017 Thanks for the link. Since the motivation is already documented in that post, why not add it into Documentation/devicetree/overlay-notes.txt as well? Seconded. Rob-- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH 0/6] Introducing Device Tree Overlays
The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree. This patchset is against mainline as of Friday Jan 4 2013. (4956964 Merge tag 'driver-core-3.8-rc2' of \ git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core) Note that a separate patch for the DTC compiler has been posted and is required to compile the DTS files according to the documentation. The patch is dtc: Dynamic symbols fixup support An implementation patchset for a beaglebone cape loader will follow, but if you want to check out a working kernel for the beaglebone please pull from: git://github.com/pantoniou/linux-bbxm.git branch not-capebus-v8 Pantelis Antoniou (6): OF: Introduce device tree node flag helpers. OF: export of_property_notify OF: Export all DT proc update functions OF: Introduce utility helper functions OF: Introduce Device Tree resolve support. OF: Introduce DT overlay support. .../devicetree/dynamic-resolution-notes.txt| 25 + Documentation/devicetree/overlay-notes.txt | 179 + drivers/of/Kconfig | 19 + drivers/of/Makefile| 4 +- drivers/of/base.c | 114 +-- drivers/of/overlay.c | 831 + drivers/of/resolver.c | 394 ++ drivers/of/util.c | 253 +++ include/linux/of.h | 243 ++ 9 files changed, 2005 insertions(+), 57 deletions(-) create mode 100644 Documentation/devicetree/dynamic-resolution-notes.txt create mode 100644 Documentation/devicetree/overlay-notes.txt create mode 100644 drivers/of/overlay.c create mode 100644 drivers/of/resolver.c create mode 100644 drivers/of/util.c -- 1.7.12 -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
On Fri, Jan 04, 2013 at 09:31:04PM +0200, Pantelis Antoniou wrote: The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree. It would be nice to know the motivation for this code. What is the use case? What problem or issue is being addressed? Thanks, Richard -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH 0/6] Introducing Device Tree Overlays
Hi Richard, On Fri, Jan 4, 2013 at 9:35 PM, Richard Cochran richardcoch...@gmail.com wrote: On Fri, Jan 04, 2013 at 09:31:04PM +0200, Pantelis Antoniou wrote: The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree. It would be nice to know the motivation for this code. What is the use case? What problem or issue is being addressed? The problem being addressed is discussed in this thread: http://permalink.gmane.org/gmane.linux.kernel/1389017 Regards, Joel -- To unsubscribe from this list: send the line unsubscribe linux-omap in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
