2019-06-20 17:06:31

by Angus Ainslie

[permalink] [raw]
Subject: [PATCH] arm64: dts: fsl: librem5: Limit the USB to 5V

The charge controller can handle 14V but the PTC on the devkit can only
handle 6V so limit the negotiated voltage to 5V.

Signed-off-by: Angus Ainslie (Purism) <[email protected]>
---
arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
index 3f4736fd3cea..ec85ada77955 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
@@ -353,7 +353,7 @@
sink-pdos = <PDO_FIXED(5000, 2000, PDO_FIXED_USB_COMM |
PDO_FIXED_DUAL_ROLE |
PDO_FIXED_DATA_SWAP )
- PDO_VAR(5000, 12000, 2000)>;
+ PDO_VAR(5000, 3000, 3000)>;
op-sink-microwatt = <10000000>;

ports {
--
2.17.1


2019-06-24 02:09:11

by Shawn Guo

[permalink] [raw]
Subject: Re: [PATCH] arm64: dts: fsl: librem5: Limit the USB to 5V

On Thu, Jun 20, 2019 at 11:04:39AM -0600, Angus Ainslie (Purism) wrote:
> The charge controller can handle 14V but the PTC on the devkit can only
> handle 6V so limit the negotiated voltage to 5V.
>
> Signed-off-by: Angus Ainslie (Purism) <[email protected]>

Prefix 'arm64: dts: librem5: ...' should be fine, so I changed it and
applied the patch.

Shawn

> ---
> arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
> index 3f4736fd3cea..ec85ada77955 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
> +++ b/arch/arm64/boot/dts/freescale/imx8mq-librem5-devkit.dts
> @@ -353,7 +353,7 @@
> sink-pdos = <PDO_FIXED(5000, 2000, PDO_FIXED_USB_COMM |
> PDO_FIXED_DUAL_ROLE |
> PDO_FIXED_DATA_SWAP )
> - PDO_VAR(5000, 12000, 2000)>;
> + PDO_VAR(5000, 3000, 3000)>;
> op-sink-microwatt = <10000000>;
>
> ports {
> --
> 2.17.1
>