diff options
| author | Cosmin Tanislav <cosmin-gabriel.tanislav.xa@renesas.com> | 2025-10-22 10:31:40 +0300 |
|---|---|---|
| committer | Geert Uytterhoeven <geert+renesas@glider.be> | 2026-01-05 16:33:04 +0300 |
| commit | 00d3dbc4744dc3213c150fb33c47697a7c60fb2f (patch) | |
| tree | 55911193b614dca1f784e875e29865c637233878 | |
| parent | 6ea91acf0f67a7e6dd1e899955346e00778d7b0f (diff) | |
| download | linux-00d3dbc4744dc3213c150fb33c47697a7c60fb2f.tar.xz | |
arm64: dts: renesas: rzt2h-n2h-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@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20251022073141.1989762-1-cosmin-gabriel.tanislav.xa@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
| -rw-r--r-- | arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts | 3 | ||||
| -rw-r--r-- | arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts b/arch/arm64/boot/dts/renesas/r9a09g077m44-rzt2h-evk.dts index b7706d0bc3aa..d1474f1bd523 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 17c0c79fbd96..eaf73868783b 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 |