[PATCH v1 01/24] fdtdec: Add API to read pci bus-range property

[Stefan Roese <sr@denx.de>]

Hi Simon,

On 28.07.20 21:01, Simon Glass wrote:
> On Fri, 24 Jul 2020 at 04:09, Stefan Roese <sr@denx.de> wrote:
>>
>> From: Suneel Garapati <sgarapati@marvell.com>
>>
>> Add fdtdec_get_pci_bus_range to read bus-range property
>> values.
>>
>> Signed-off-by: Suneel Garapati <sgarapati@marvell.com>
>> Cc: Simon Glass <sjg@chromium.org>
>>
>> Signed-off-by: Stefan Roese <sr@denx.de>
>> ---
>>
>> Changes in v1:
>> - Added return value description to function prototype in header
>> - Changed from using be32_to_cpup() to fdt32_to_cpu()
>>
>>   include/fdtdec.h | 13 +++++++++++++
>>   lib/fdtdec.c     | 16 ++++++++++++++++
>>   2 files changed, 29 insertions(+)
> 
> Reviewed-by: Simon Glass <sjg@chromium.org>
> 
> Is the address always 32-bit?

Yes, I think so. Its done in a similar way in the Linux kernel.

Thanks,
Stefan

> 
>>
>> diff --git a/include/fdtdec.h b/include/fdtdec.h
>> index 760b392bdf..f6759c7f8e 100644
>> --- a/include/fdtdec.h
>> +++ b/include/fdtdec.h
>> @@ -444,6 +444,19 @@ int fdtdec_get_pci_vendev(const void *blob, int node,
>>   int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
>>                           u32 *bar);
>>
>> +/**
>> + * Look at the bus range property of a device node and return the pci bus
>> + * range for this node.
>> + * The property must hold one fdt_pci_addr with a length.
>> + * @param blob         FDT blob
>> + * @param node         node to examine
>> + * @param res          the resource structure to return the bus range
>> + * @return 0 if ok, negative on error
>> + */
>> +
>> +int fdtdec_get_pci_bus_range(const void *blob, int node,
>> +                            struct fdt_resource *res);
>> +
>>   /**
>>    * Look up a 32-bit integer property in a node and return it. The property
>>    * must have at least 4 bytes of data. The value of the first cell is
>> diff --git a/lib/fdtdec.c b/lib/fdtdec.c
>> index 78576b530f..0b40fa374a 100644
>> --- a/lib/fdtdec.c
>> +++ b/lib/fdtdec.c
>> @@ -242,6 +242,22 @@ int fdtdec_get_pci_bar32(const struct udevice *dev, struct fdt_pci_addr *addr,
>>
>>          return 0;
>>   }
>> +
>> +int fdtdec_get_pci_bus_range(const void *blob, int node,
>> +                            struct fdt_resource *res)
>> +{
>> +       const u32 *values;
>> +       int len;
>> +
>> +       values = fdt_getprop(blob, node, "bus-range", &len);
>> +       if (!values || len < sizeof(*values) * 2)
>> +               return -EINVAL;
>> +
>> +       res->start = fdt32_to_cpu(*values++);
>> +       res->end = fdt32_to_cpu(*values);
>> +
>> +       return 0;
>> +}
>>   #endif
>>
>>   uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,
>> --
>> 2.27.0
>>


Viele Gr??e,
Stefan

-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-51 Fax: (+49)-8142-66989-80 Email: sr at denx.de