RE: [PATCH] arm64: dts: renesas: rzt2h/rzn2h-evk: add note about SD1 1.8V modes

[Cosmin-Gabriel Tanislav]

Hello Geert, could you please review / pick this patch up too?

> -----Original Message-----
> From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@xxxxxxxxxxx>
> Sent: Wednesday, October 22, 2025 10:32 AM
> Cc: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>; magnus.damm <magnus.damm@xxxxxxxxx>; Rob Herring
> <robh@xxxxxxxxxx>; Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>; Conor Dooley <conor+dt@xxxxxxxxxx>; linux-
> renesas-soc@xxxxxxxxxxxxxxx; devicetree@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Cosmin-Gabriel
> Tanislav <cosmin-gabriel.tanislav.xa@xxxxxxxxxxx>
> Subject: [PATCH] arm64: dts: renesas: rzt2h/rzn2h-evk: add note about SD1 1.8V modes
> 
> 1.8V operation of SD1 requires the jumper to be placed on the correct
> pins of a connector on these Evaluation Kits. 1.8V is needed to achieve
> the higher rated speeds like SDR104. Add a note about it to make sure no
> one else spends too much time figuring this out.
> 
> Signed-off-by: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@xxxxxxxxxxx>
> ---
>  arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts | 3 +++
>  arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts | 3 +++
>  2 files changed, 6 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
> b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
> index e94b84393bd9..7269bca8c8cc 100644
> --- a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
> +++ b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts
> @@ -26,6 +26,9 @@
>   * P17_4 = SD1_CD; SW2[3] = ON
>   * P08_5 = SD1_PWEN; SW2[3] = ON
>   * P08_6 = SD1_IOVS; SW2[3] = ON; SW5[3] = OFF; SW5[4] = ON
> + * To enable proper operation in 1.8V modes, CN77 must have pins 2 and 3
> + * connected by the jumper. This connects SD1 power-supply control IC output
> + * back to VCC1833_7.
>   */
>  #define SD1_MICRO_SD	1
> 
> diff --git a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
> b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
> index d27da157c6d6..c87cb6510edc 100644
> --- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
> +++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
> @@ -30,6 +30,9 @@
>  /*
>   * P17_4 = SD1_CD; DSW5[3] = ON; DSW19[1] = OFF; DSW19[2] = ON
>   * P08_6 = SD1_IOVS; DSW5[3] = ON
> + * To enable proper operation in 1.8V modes, JP21 must have pins 2 and 3
> + * connected by the jumper. This connects SD1 power-supply control IC output
> + * back to VCC1833_7.
>   */
>  #define SD1_MICRO_SD	1
> 
> --
> 2.51.1.dirty