[PATCH v8 00/21] riscv: Add Sipeed Maix support

[Sean Anderson <seanga2@gmail.com>]

On 4/22/20 10:12 PM, Sean Anderson wrote:
> On 4/22/20 10:10 PM, Bin Meng wrote:
>> Hi Sean,
>>
>> On Thu, Apr 23, 2020 at 10:03 AM Sean Anderson <seanga2@gmail.com> wrote:
>>>
>>> On 4/22/20 9:51 PM, Rick Chen wrote:
>>>> Hi Sean
>>>>
>>>>> Hi Sean
>>>>>
>>>>>> This patch series adds support for Sipeed Maix boards and the Kendryte
>>>>>> K210 CPU. Currently, only the Maix Bit V2.0 is supported, however other
>>>>>> models are similar.
>>>>>>
>>>>>> Known Bugs/Limitations:
>>>>>> - Accessing the AI ram hangs, limiting available ram to 6M
>>>>>> - Trying to boot an image with bootm fails with
>>>>>>   ERROR: Failed to allocate 0x7d60 bytes below 0x80000000.
>>>>>>
>>>>>> To flash u-boot to a maix bit, run
>>>>>> kflash -tp /dev/<your tty here> -B bit_mic u-boot-dtb.bin
>>>>>>
>>>>>> Boot output should look like the following:
>>>>>>
>>>>>> U-Boot 2020.04-rc2-00087-g2221cc09c1-dirty (Feb 28 2020 - 13:53:09 -0500)
>>>>>>
>>>>>> DRAM:  8 MiB
>>>>>> In:    serial at 38000000
>>>>>> Out:   serial at 38000000
>>>>>> Err:   serial at 38000000
>>>>>> =>
>>>>>>
>>>>>> Changes for v8:
>>>>>> - Removed dependency on the patch "clk: Add functions to register CCF clock
>>>>>>   structs". Hopefully this will make reviewing easier.
>>>>>
>>>>> I have applied this patch series to u-boot-riscv/master except [PATCH
>>>>> v8 14/21] riscv: Clean up IPI initialization code.
>>>>> Because it will cause some warnings as below:
>>>>>
>>>>> arch/riscv/lib/andes_plic.c: In function 'riscv_init_ipi':
>>>>> arch/riscv/lib/andes_plic.c:84:12: warning: initialization makes
>>>>> integer from pointer without a cast [-Wint-conversion]
>>>>>   int ret = syscon_get_first_range(RISCV_SYSCON_PLIC);
>>>>>             ^~~~~~~~~~~~~~~~~~~~~~
>>>>> arch/riscv/lib/andes_plic.c:86:13: warning: passing argument 1 of
>>>>> 'IS_ERR' makes pointer from integer without a cast [-Wint-conversion]
>>>>>   if (IS_ERR(ret))
>>>>>              ^~~
>>>>> In file included from arch/riscv/lib/andes_plic.c:20:0:
>>>>> include/linux/err.h:34:20: note: expected 'const void *' but argument
>>>>> is of type 'int'
>>>>>  static inline long IS_ERR(const void *ptr)
>>>>>                     ^~~~~~
>>>>> arch/riscv/lib/andes_plic.c:87:18: warning: passing argument 1 of
>>>>> 'PTR_ERR' makes pointer from integer without a cast [-Wint-conversion]
>>>>>    return PTR_ERR(ret);
>>>>>                   ^~~
>>>>> In file included from arch/riscv/lib/andes_plic.c:20:0:
>>>>> include/linux/err.h:29:20: note: expected 'const void *' but argument
>>>>> is of type 'int'
>>>>>  static inline long PTR_ERR(const void *ptr)
>>>>>                     ^~~~~~~
>>>>> arch/riscv/lib/andes_plic.c:88:16: warning: assignment makes pointer
>>>>> from integer without a cast [-Wint-conversion]
>>>>>   gd->arch.plic = ret;
>>>>>

This was caused by the ret variable being the wrong type; should be
fixed.

>>>>
>>>> after running CI yesterday, it failed in many cases:
>>>> https://travis-ci.org/github/rickchen36/u-boot-riscv/builds/678023975
>>>>
>>>> and I trace at least two cases belong to your patch
>>>> 49.59
>>>> https://travis-ci.org/github/rickchen36/u-boot-riscv/jobs/678024035
>>>>
>>>> arning, treated as error:
>>>> /home/travis/build/rickchen36/u-boot-riscv/doc/board/sipeed/maix.rst:173:Error
>>>> in "code-block" directive:
>>>> 1 argument(s) required, 0 supplied.
>>>> .. code-block::
>>>>     &sysclk {
>>>>         assigned-clocks = <&sysclk K210_CLK_PLL0>;
>>>>         assigned-clock-rates = <800000000>;
>>>>     };
>>>> doc/Makefile:69: recipe for target 'htmldocs' failed
>>>> make[1]: *** [htmldocs] Error 1
>>>
>>> I used to have
>>>
>>> .. code-block:: dts
>>>
>>> but it warned that "dts" was not a valid language, so I dropped it
>>>

I've marked these blocks as "none" instead.

>>>> 49.66
>>>> https://travis-ci.org/github/rickchen36/u-boot-riscv/jobs/678024042
>>>>
>>>> ./tools/patman/patman --test && ./tools/buildman/buildman -t &&
>>>> ./tools/dtoc/dtoc -t && make testconfig; fi; fi
>>>> cp: cannot create regular file
>>>> '/home/travis/build/rickchen36/sandbox/': Not a directory
>>>> cp: cannot create regular file
>>>> '/home/travis/build/rickchen36/sandbox/': Not a directory
>>>> WARNING: no status info for 'sipeed_maix_bitm'
>>>> WARNING: no maintainers for 'sipeed_maix_bitm'
>>>
>>> I'm not sure what the issue here is. Which specific files are lacking a
>>> MAINTAINERS entry?
>>>
>>
>> You need create a MAINTAINERS file in the board directory.
> 
> It is already created.

Ok, I think this is because the defconfig was renamed at some point but
MAINTAINERS was not update to reflect the change.

> 
>>
>>>>
>>>> So I will drop your patchs and run CI again today.
>>>> And hope you can fix them in next version and pass CI verification.
>>>
>>
>> Regards,
>> Bin
>>
>