linux-kernel - Re: [PATCH 01/12] arm64: dts: exynos: add USB DWC3 supplies to Espresso board

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Message-ID: <cabc3a91-807c-856b-5b74-03788781e2a0@canonical.com>
Date:   Wed, 26 Jan 2022 09:10:13 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Alim Akhtar <alim.akhtar@...il.com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-usb <linux-usb@...r.kernel.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 01/12] arm64: dts: exynos: add USB DWC3 supplies to
 Espresso board

On 26/01/2022 07:58, Alim Akhtar wrote:
> Hi Krzysztof
> 
> On Mon, Jan 24, 2022 at 1:34 PM Krzysztof Kozlowski
> <krzysztof.kozlowski@...onical.com> wrote:
>>
>> Add required voltage regulators for USB DWC3 block on Exynos7 Espresso
>> board.  Due to lack of schematics of Espresso board, the choice of
>> regulators is approximate.  What bindings call VDD10, for Exynos7 should
>> be actually called VDD09 (0.9 V).  Use regulators with a matching
>> voltage range based on vendor sources for Meizu Pro 5 M576 handset (also
>> with Exynos7420).
>>
> 
> I checked Espresso board schematic, it is 0.9V for the USB and supplied by LDO4
> 

Thanks for checking!


Best regards,
Krzysztof