[RFC PATCH 15/16] tools/fdtgrep: Include __symbols__ table

[MD Danish Anwar]

Hi Simon,

On 26/12/23 3:17 pm, Simon Glass wrote:
> Hi,
> 
> On Tue, Dec 19, 2023 at 10:34 AM MD Danish Anwar <danishanwar at ti.com> wrote:
>>
>> This is required for overlays to work at SPL.
>>
>> Loading of symbol table depends on DT Overlay support in SPL
>> so make it compile-time dependent. Without this SPL fails to
>> boot some platforms where this feature is not enabled
>> (e.g. dra71-evm.)
>>
>> Without including the <linux/kconfig.h> file, the symbol
>> CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY will not be visible and
>> we will never include the symbol table.
>>
>> So include <linux/kconfig.h>
>>
>> Due to some reason it needs to be included after
>> [#include "fdt_host.h"] otherwise it causes a build error.
>>
>> Signed-off-by: MD Danish Anwar <danishanwar at ti.com>
>> ---
>>  tools/fdtgrep.c | 8 ++++++++
>>  1 file changed, 8 insertions(+)
>>
>> diff --git a/tools/fdtgrep.c b/tools/fdtgrep.c
>> index 7eabcab439..706b4a35f4 100644
>> --- a/tools/fdtgrep.c
>> +++ b/tools/fdtgrep.c
>> @@ -22,6 +22,8 @@
>>  #include "fdt_host.h"
>>  #include "libfdt_internal.h"
>>
>> +#include <linux/kconfig.h>
>> +
>>  /* Define DEBUG to get some debugging output on stderr */
>>  #ifdef DEBUG
>>  #define debug(a, b...) fprintf(stderr, a, ## b)
>> @@ -1234,6 +1236,12 @@ int main(int argc, char *argv[])
>>                 disp.fout = stdout;
>>         }
>>
>> +       if (IS_ENABLED(CONFIG_SPL_LOAD_FIT_APPLY_OVERLAY)) {
>> +               /* include symbol table */
>> +               if (value_add(&disp, &disp.value_head, FDT_IS_NODE, 1, "/__symbols__"))
>> +                       usage("Cannot add __symbols__ value");
>> +       }
>> +
>>         /* Run the grep and output the results */
>>         ret = do_fdtgrep(&disp, filename);
>>         if (disp.output_fname)
>> --
>> 2.34.1
>>
> 
> I may have replied elsewhere, but please use a new fdtgrep option for this.
> 
> Regards,
> Simon

This patch is actually not needed. Without this patch also I am able to
apply overlays at SPL. Even without this patch I see symbols table
getting included while using fdtgrep tool. I will drop this patch in v2.

-- 
Thanks and Regards,
Danish