[PATCH] phy: can-transceiver: Re-instate "mux-states" property presence check

[Sergey Shtylyov]

On 3/19/25 4:27 PM, Geert Uytterhoeven wrote:

> On the Renesas Gray Hawk Single development board:
> 
>     can-transceiver-phy can-phy0: /can-phy0: failed to get mux-state (0)
> 
> "mux-states" is an optional property for CAN transceivers.  However,
> mux_get() always prints an error message in case of an error, including
> when the property is not present, confusing the user.
> 
> Fix this by re-instating the property presence check.
> 
> This is bascially a revert of commit d02dfd4ceb2e9f34 ("phy:

   Basically. :-)

> can-transceiver: Drop unnecessary "mux-states" property presence
> check"), with two changes:
>   1. Use the proper API for checking whether a property is present,
>   2. Do not print an error message, as the mux core already takes care
>      of that.
> 
> Fixes: d02dfd4ceb2e9f34 ("phy: can-transceiver: Drop unnecessary "mux-states" property presence check")
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> ---
> Alternatively, the multiplexer subsystem needs to gain support for
> getting an optional mux...
[...]
MBR, Sergey