| Message ID | 20190126041041.13173-1-manivannan.sadhasivam@linaro.org |
|---|---|
| Headers | show |
| Series | Add initial Bitmain BM1880 SoC/Board support | expand |
On Sat, Jan 26, 2019 at 09:40:36AM +0530, Manivannan Sadhasivam wrote: > Hello, > > This patchset adds initial support for Bitmain BM1880 SoC and Sophon > Edge board. BM1880 SoC consists of a Dual Core ARM Cortex A53 Application > processor subsystem, a single core RISC-V subsystem and a Tensor > Processor subsystem. Hi Manivannan Interesting combination of CPUs. > This patchset adds support for only ARM Cortex A53 Application > processor subsystem with UART, which enables the board to boot into > initramfs with 2 CPUs. Looking forward, what sharing do you expect at the device tree level? Looking at https://sophon-file.bitmain.com.cn/sophon-prod/drive/18/11/06/19/BM1880%20product%20brief%20V0.04_Chinese%20versionV0.06.pdf it appears all the devices can be shared between the CPUs. So do you plan to have a shared .dtsi file somewhere? Is ARCH_BITMAIN going to be both ARM64 and RISC-V? Thanks Andrew
Hi Andrew, On Sat, Jan 26, 2019 at 04:03:20PM +0100, Andrew Lunn wrote: > On Sat, Jan 26, 2019 at 09:40:36AM +0530, Manivannan Sadhasivam wrote: > > Hello, > > > > This patchset adds initial support for Bitmain BM1880 SoC and Sophon > > Edge board. BM1880 SoC consists of a Dual Core ARM Cortex A53 Application > > processor subsystem, a single core RISC-V subsystem and a Tensor > > Processor subsystem. > > Hi Manivannan > > Interesting combination of CPUs. > > > This patchset adds support for only ARM Cortex A53 Application > > processor subsystem with UART, which enables the board to boot into > > initramfs with 2 CPUs. > > Looking forward, what sharing do you expect at the device tree level? > > Looking at > > https://sophon-file.bitmain.com.cn/sophon-prod/drive/18/11/06/19/BM1880%20product%20brief%20V0.04_Chinese%20versionV0.06.pdf > > it appears all the devices can be shared between the CPUs. So do you > plan to have a shared .dtsi file somewhere? > > Is ARCH_BITMAIN going to be both ARM64 and RISC-V? > We don't have any plan to add support for RISC-V subsystem. Moreover, from the SoC product brief it look like the RISC-V core is a MCU grade core, so I doubt whether we can run linux on it! It might be a candidate for RTOS. For now, ARCH_BITMAIN is going to have only ARM64 support. Thanks, Mani > Thanks > Andrew
On Fri, Jan 25, 2019 at 10:11 PM Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> wrote: > > Document Bitmain BM1880 SoC from Bitmain Technologies Ltd along with the > Sophon Edge board. > > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> > --- > .../devicetree/bindings/arm/bitmain.yaml | 18 ++++++++++++++++++ > 1 file changed, 18 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/bitmain.yaml Reviewed-by: Rob Herring <robh@kernel.org>
On Sat, Jan 26, 2019 at 5:11 AM Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> wrote: > > Hello, > > This patchset adds initial support for Bitmain BM1880 SoC and Sophon > Edge board. BM1880 SoC consists of a Dual Core ARM Cortex A53 Application > processor subsystem, a single core RISC-V subsystem and a Tensor > Processor subsystem. This patchset adds support for only ARM Cortex > A53 Application processor subsystem with UART, which enables the board to > boot into initramfs with 2 CPUs. Nice work! All patches in this series Acked-by: Arnd Bergmann <arnd@arndb.de>
Hi Arnd, On Sun, Jan 27, 2019 at 10:24:09AM +0100, Arnd Bergmann wrote: > On Sat, Jan 26, 2019 at 5:11 AM Manivannan Sadhasivam > <manivannan.sadhasivam@linaro.org> wrote: > > > > Hello, > > > > This patchset adds initial support for Bitmain BM1880 SoC and Sophon > > Edge board. BM1880 SoC consists of a Dual Core ARM Cortex A53 Application > > processor subsystem, a single core RISC-V subsystem and a Tensor > > Processor subsystem. This patchset adds support for only ARM Cortex > > A53 Application processor subsystem with UART, which enables the board to > > boot into initramfs with 2 CPUs. > > Nice work! All patches in this series > > Acked-by: Arnd Bergmann <arnd@arndb.de> Thanks. What is the merge strategy for this patchset? Shall I send a Pull Request to arm@kernel.org with topic branches? Regards, Mani
On Fri, Feb 1, 2019, 04:50 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org wrote: > On Sun, Jan 27, 2019 at 10:24:09AM +0100, Arnd Bergmann wrote: > > On Sat, Jan 26, 2019 at 5:11 AM Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> wrote: > > > > > > This patchset adds initial support for Bitmain BM1880 SoC and Sophon > > > Edge board. BM1880 SoC consists of a Dual Core ARM Cortex A53 Application > > > processor subsystem, a single core RISC-V subsystem and a Tensor > > > Processor subsystem. This patchset adds support for only ARM Cortex > > > A53 Application processor subsystem with UART, which enables the board to > > > boot into initramfs with 2 CPUs. > > > > Nice work! All patches in this series > > > > Acked-by: Arnd Bergmann <arnd@arndb.de> > > Thanks. What is the merge strategy for this patchset? Shall I send a > Pull Request to arm@kernel.org with topic branches? I think we should take new platforms as a single topic branch separate from the normal branches, so please send a single pull request for this one. Also, if you have drivers that are closely tied to this platform, that branch include those as well, provided that you have an Ack from the respective subsystem maintainers. Arnd