| Message ID | 20240327192641.14220-1-dev@folker-schwesinger.de (mailing list archive) |
|---|---|
| Headers | show |
| Series | Enable internal strobe pulldown on Radxa ROCK 4 SBCs | expand |
On Wed, 27 Mar 2024 20:26:36 +0100, Folker Schwesinger wrote: > Various RK3399 boards, including the ROCK Pi 4 series showed instabilities > with some eMMC modules when operating in HS400 mode [1]. Later, a missing > pull-down resistor on the eMMC strobe line was identified as the root > cause of these instabilities [2]. > > This series enables the internal pull-down on the eMMC PHY strobe line > for all ROCK 4 series boards as they all lack an external strobe > pull-down resistor. > > [...] Applied, thanks! [1/2] arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK Pi 4 commit: f720dd9b8b6d8b2160beda789429d5489ce8a099 [2/2] arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK 4C+ commit: c1b1f340dd7db11f273e426e110697551c9f501f Best regards,
Various RK3399 boards, including the ROCK Pi 4 series showed instabilities with some eMMC modules when operating in HS400 mode [1]. Later, a missing pull-down resistor on the eMMC strobe line was identified as the root cause of these instabilities [2]. This series enables the internal pull-down on the eMMC PHY strobe line for all ROCK 4 series boards as they all lack an external strobe pull-down resistor. Furthermore, HS400 mode is re-enabled for these boards. Previously, to workaround the instabilities until the issue was investigated further, HS400 mode was replaced with HS200 mode [1]. [1]: https://lore.kernel.org/all/20230705144255.115299-1-chris.obbard@collabora.com/ [2]: https://lore.kernel.org/all/20220822074139.3810-1-jensenhuang@friendlyarm.com/ Folker Schwesinger (2): arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK Pi 4 arm64: dts: rockchip: Add enable-strobe-pulldown to emmc phy on ROCK 4C+ arch/arm64/boot/dts/rockchip/rk3399-rock-4c-plus.dts | 4 +++- arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4.dtsi | 4 +++- 2 files changed, 6 insertions(+), 2 deletions(-) base-commit: 4cece764965020c22cff7665b18a012006359095