[PATCH 3/3] mips: mt76x8: ddr_cal: Correct dqs_find_min/max implementations

[Weijie Gao <weijie.gao@mediatek.com>]

On Fri, 2020-03-06 at 15:14 +0100, Stefan Roese wrote:
> The current implementations have some issues detecting the correct
> values:
> 
> dqs_find_max() will return "last passing fieldval + 1" instead of
> "last passing fieldval". Also it will return "maxval + 1" in the
> case that all fieldvals are tested valid (without error).
> 
> dqs_find_min() will not test the "lowest" value because of using ">"
> instead of ">=".
> 
> This patch now rewrites these functions to fix those issues. Also,
> this patch uses the same approach of a for loop in both functions making
> it easier to read and maintain.
> 
> Since the variables are integers now, we can use min()/max(), which
> handles the wrap around case for fieldval=0: return (0 - 1).
> 
> Signed-off-by: Stefan Roese <sr@denx.de>
> Cc: Weijie Gao <weijie.gao@mediatek.com>
> Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
> ---
>  arch/mips/mach-mtmips/ddr_cal.c | 28 ++++++++++------------------
>  1 file changed, 10 insertions(+), 18 deletions(-)
> 

Reviewed-by: Weijie Gao <weijie.gao@mediatek.com>