Re: [PATCH v2] ARM: dts: samsung: exynos4210-i9100: Enable RTS/CTS in Bluetooth node

[Marek Szyprowski]

On 03.09.2026 15:29, Paul Cercueil wrote:
> Le mercredi 02 septembre 2026 à 10:36 +0200, Marek Szyprowski a écrit :
>> On 29.08.2026 12:15, Paul Cercueil wrote:
>>> The BCM4330 is connected using CTS/RTS too, so add the 'uart-has-
>>> rtscts'
>>> property.
>>>
>>> Signed-off-by: Paul Cercueil <paul@xxxxxxxxxxxxxxx>
>> Indeed the CTS/RTS pins are used for BT on most of the ARM Exynos
>> boards,
>> as the "<&uartX_fctl>" property is assigned for pinctl-0. This is not
>> really
>> specific to i9100, so maybe this property should be added to other
>> dts?
> I can add it to all exynos4 boards that use the "uartX_fctl" property.
>
>
>> However I wonder if Samsung UART driver actually use this "uart-has-
>> rtscts"
>> DT property? A quick "git grep uart-has-rtscts drivers/tty" shows
>> nothing
>> related to Samsung Exynos...
> It looks like it does not. I still think the DT property should be here
> but I won't fight over this.
I also don't have strong opinion on this issue. Krzysztof: do You see
any benefit from adding this "uart-has-rtscts" property, just to describe
precisely the actual hardware, even if it won't be used by any driver?

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland