[PATCH v4 2/3] pinctrl: bcm: Add STB family pin controller driver

[Florian Fainelli]

On 9/1/2025 1:21 AM, Linus Walleij wrote:
> On Thu, Aug 28, 2025 at 2:45 PM Andrea della Porta
> <andrea.porta at suse.com> wrote:
> 
>> From: "Ivan T. Ivanov" <iivanov at suse.de>
>>
>> This driver provide pin muxing and configuration functionality
>> for BCM2712 SoC used by RPi5. According to [1] this chip is an
>> instance of the one used in Broadcom STB  product line.
>>
>> [1] https://lore.kernel.org/lkml/f6601f73-cb22-4ba3-88c5-241be8421fc3@broadcom.com/
>>
>> Cc: Jonathan Bell <jonathan at raspberrypi.com>
>> Cc: Phil Elwell <phil at raspberrypi.com>
>> Signed-off-by: Ivan T. Ivanov <iivanov at suse.de>
>> Reviewed-by: Phil Elwell <phil at raspberrypi.com>
>> Signed-off-by: Andrea della Porta <andrea.porta at suse.com>
> 
> Overall this feels merge class, I am looking over the requirement
> series from Bartosz to see if we can merge it all today.
> 
> I also looked in a vendor tree for the (by now 6 years old...)
> BCMBCA driver, but it appears to be a completely different
> beast, requiring some magic 0x21 to be written into a register
> to "commit" a pin control change.

Yeah, the BCA chips have a different controller for pin mux/control.
This driver submitted by Andrea is common to STB and CM product lines, 
although the CM chips also used the BCA block at some point in their 
history.
-- 
Florian