[U-Boot] [PATCH v3 03/13] fdtdec: Add fdt_{addr, size}_unpack() helpers

[Simon Glass <sjg@chromium.org>]

Hi Thierry,

On Fri, 22 Mar 2019 at 02:10, Thierry Reding <thierry.reding@gmail.com> wrote:
>
> From: Thierry Reding <treding@nvidia.com>
>
> These helpers can be used to unpack variables of type fdt_addr_t and
> fdt_size_t into a pair of 32-bit variables. This is useful in cases
> where such variables need to be written to properties (such as "reg")
> of a device tree node where they need to be split into cells.
>
> Signed-off-by: Thierry Reding <treding@nvidia.com>
> ---
> Changes in v2:
> - new patch
>
>  include/fdtdec.h | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
>
> diff --git a/include/fdtdec.h b/include/fdtdec.h
> index a965c33157c9..a0ba57c6318b 100644
> --- a/include/fdtdec.h
> +++ b/include/fdtdec.h
> @@ -23,6 +23,31 @@
>   */
>  typedef phys_addr_t fdt_addr_t;
>  typedef phys_size_t fdt_size_t;
> +
> +static inline fdt32_t fdt_addr_unpack(fdt_addr_t addr, fdt32_t *upper)
> +{
> +       if (upper)
> +#ifdef CONFIG_PHYS_64BIT

Could we use 'if IS_ENABLED()' instead?

> +               *upper = addr >> 32;
> +#else
> +               *upper = 0;
> +#endif
> +
> +       return addr;
> +}
> +
> +static inline fdt32_t fdt_size_unpack(fdt_size_t size, fdt32_t *upper)
> +{
> +       if (upper)
> +#ifdef CONFIG_PHYS_64BIT
> +               *upper = size >> 32;
> +#else
> +               *upper = 0;
> +#endif
> +
> +       return size;
> +}
> +
>  #ifdef CONFIG_PHYS_64BIT
>  #define FDT_ADDR_T_NONE (-1U)
>  #define fdt_addr_to_cpu(reg) be64_to_cpu(reg)
> --
> 2.21.0
>

Regards,
Simon