[U-Boot] [PATCH] fdt: add new fdt address parsing functions

[Mugunthan V N]

On Friday 07 August 2015 03:01 AM, Stephen Warren wrote:
> From: Stephen Warren <swarren at nvidia.com>
> 
> fdtdec_get_addr_size() hard-codes the number of cells used to represent
> an address or size in DT. This is incorrect in many cases depending on
> the DT binding for a particular node or property (e.g. it is incorrect
> for the "reg" property). In most cases, DT parsing code must use the
> properties #address-cells and #size-cells to parse addres properties.
> 
> This change splits up the implementation of fdtdec_get_addr_size() so
> that the core logic can be used for both hard-coded and non-hard-coded
> cases. Various wrapper functions are implemented that support cases
> where hard-coded cell counts should or should not be used, and where
> the client does and doesn't know the parent node ID that contains the
> properties #address-cells and #size-cells.
> 
> dev_get_addr() is updated to use the new functions.
> 
> Core functionality in fdtdec_get_addr_size_fixed() is widely tested via
> fdtdec_get_addr_size(). I tested fdtdec_get_addr_size_auto_noparent() and
> dev_get_addr() by manually modifying the Tegra I2C driver to invoke them.
> 
> Much of the core implementation of fdtdec_get_addr_size_fixed(),
> fdtdec_get_addr_size_auto_parent(), and
> fdtdec_get_addr_size_auto_noparent() comes from Thierry Reding's
> previous commit "fdt: Fix fdtdec_get_addr_size() for 64-bit".

Tested this patch for cpsw ethernet dt migration to getting cpsw address
space. Also dropped *#define DEBUG* in lib/fdtdev.c file.

Tested-by: Mugunthan V N <mugunthanvnm at ti.com>

Regards
Mugunthan V N