On 20:34-20210528, Jan Kiszka wrote: > On 11.05.21 18:48, Aswath Govindraju wrote: > > UHS-I speed modes are supported in AM65 S.R. 2.0 SoC[1]. > > > > Add support by removing the no-1-8-v tag and including the voltage > > regulator device tree nodes for power cycling. > > > > However, the 4 bit interface of AM65 SR 1.0 cannot be supported at 3.3 V or > > 1.8 V because of erratas i2025 and i2026 [2]. As the SD card is the primary > > boot mode for development usecases, continue to enable SD card and disable > > UHS-I modes in it to minimize any ageing issues happening because of > > erratas. > > > > k3-am6528-iot2050-basic and k3-am6548-iot2050-advanced boards use S.R. 1.0 > > version of AM65 SoC. Therefore, add no-1-8-v in sdhci1 device tree node of > > the common iot2050 device tree file. > > > > [1] - https://www.ti.com/lit/ug/spruid7e/spruid7e.pdf, section 12.3.6.1.1 > > [2] - https://www.ti.com/lit/er/sprz452e/sprz452e.pdf > > > > Signed-off-by: Aswath Govindraju <a-govindraju@xxxxxx> > > --- > > > > changes since v2: > > - moved the no-1-8-v tag to common iot2050 dtsi file. > > > > changes since v1: > > - added no-1-8-v tag in sdhci1 dt nodes of k3-am6528-iot2050-basic and > > k3-am6548-iot2050-advanced boards as they use S.R.1.0 version AM65 SoC. > > > > .../boot/dts/ti/k3-am65-iot2050-common.dtsi | 1 + > > arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 1 - > > .../arm64/boot/dts/ti/k3-am654-base-board.dts | 33 +++++++++++++++++++ > > 3 files changed, 34 insertions(+), 1 deletion(-) > > > > diff --git a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi > > index de763ca9251c..46cc348cd4be 100644 > > --- a/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi > > +++ b/arch/arm64/boot/dts/ti/k3-am65-iot2050-common.dtsi > > @@ -555,6 +555,7 @@ > > pinctrl-0 = <&main_mmc1_pins_default>; > > ti,driver-strength-ohm = <50>; > > disable-wp; > > + no-1-8-v; > > }; > > > > Acked-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx> > Thanks Jan. Aswath: It does'nt apply cleanly on my tree as I am picking up patches.. There are new cleanups and nodes I have picked up, so could be conflicting with those. Please rebase and post based on: https://git.kernel.org/pub/scm/linux/kernel/git/nmenon/linux.git/log/?h=ti-k3-dts-next I'd suggest you do that on monday OR base on monday's linux-next tag for the next post. We need to make sure it does'nt conflict with Suman's repost[1] - So, lets sync with suman offline to make sure we queue this up in the right order. [1] https://lore.kernel.org/linux-arm-kernel/e0da118a-077b-2e04-1e75-1550bcfa3540@xxxxxx/ -- Regards, Nishanth Menon Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3 1A34 DDB5 849D 1736 249D
