Re: [PATCHv3 3/6] arm64: dts: amlogic: odroidc2: Fix the chip enable signal... | linux-devicetree

[PATCHv3 0/6] Meson-8b and Meson-gxbb Fix some missing code · Anand Moon <hidden> · 2021-08-17
[PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Anand Moon <hidden> · 2021-08-17
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Martin Blumenstingl <martin.blumenstingl@googlemail.com> · 2021-08-28
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Neil Armstrong <hidden> · 2021-08-30
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Martin Blumenstingl <martin.blumenstingl@googlemail.com> · 2021-08-30
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Neil Armstrong <hidden> · 2021-08-31
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Anand Moon <hidden> · 2021-08-31
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Martin Blumenstingl <martin.blumenstingl@googlemail.com> · 2021-09-21
Re: [PATCHv3 1/6] ARM: dts: meson8b: odroidc1: Add usb phy power node · Anand Moon <hidden> · 2021-09-25
[PATCHv3 2/6] ARM: dts: meson8b: odroidc1: Set usb power source to always on · Anand Moon <hidden> · 2021-08-17
Re: [PATCHv3 2/6] ARM: dts: meson8b: odroidc1: Set usb power source to always on · Martin Blumenstingl <martin.blumenstingl@googlemail.com> · 2021-08-28
[PATCHv3 3/6] arm64: dts: amlogic: odroidc2: Fix the chip enable signal for usb power · Anand Moon <hidden> · 2021-08-17
Re: [PATCHv3 3/6] arm64: dts: amlogic: odroidc2: Fix the chip enable signal for usb power · Martin Blumenstingl <martin.blumenstingl@googlemail.com> · 2021-08-28
[PATCHv3 4/6] arm64: dts: amlogic: odroidc2: use vbus-supply for power source for usb nodes · Anand Moon <hidden> · 2021-08-17
Re: [PATCHv3 4/6] arm64: dts: amlogic: odroidc2: use vbus-supply for power source for usb nodes · Martin Blumenstingl <martin.blumenstingl@googlemail.com> · 2021-08-28
[PATCHv3 5/6] phy: amlogic: meson8b-usb2: Power off the PHY by putting it into reset mode · Anand Moon <hidden> · 2021-08-17
Re: [PATCHv3 5/6] phy: amlogic: meson8b-usb2: Power off the PHY by putting it into reset mode · Vinod Koul <vkoul@kernel.org> · 2021-08-17
[PATCHv3 6/6] phy: amlogic: meson8b-usb2: don't log an error on -EPROBE_DEFER · Anand Moon <hidden> · 2021-08-17
Re: [PATCHv3 6/6] phy: amlogic: meson8b-usb2: don't log an error on -EPROBE_DEFER · Vinod Koul <vkoul@kernel.org> · 2021-08-17

Re: [PATCHv3 3/6] arm64: dts: amlogic: odroidc2: Fix the chip enable signal for usb power

From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: 2021-08-28 16:00:45
Also in: linux-amlogic, linux-arm-kernel, linux-phy, lkml

Hi Anand,

On Tue, Aug 17, 2021 at 6:17 AM Anand Moon [off-list ref] wrote:

Fix the chip enable signal changing from Active High to Active Low
to enable input power to USB power. Also updated signal name as per
the schematics.

according to [0] (page 12) Odroid-C2 uses an "RT9715EGB" for USB OTG power
The datasheet for that power switch [1] mentions on page page 1 that
the "E" stands for "E : 1.1A/Active High"

Can you please elaborate how you have tested this to confirm that
active low is the correct polarity?


Best regards,
Martin


[0] https://dn.odroid.com/S905/Schematic/odroid-c2_rev0.1_20150930.pdf
[1] https://www.richtek.com/assets/product_file/RT9715/DS9715-03.pdf

`h`	back out one level
`j`	next message in thread
`k`	previous message in thread
`l`	drill in
`Esc`	close help / fold thread tree
`?`	toggle this help