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Message-ID: <20230628142800.thhexjvk7ekhdb3m@CAB-WSD-L081021>
Date:   Wed, 28 Jun 2023 17:28:00 +0300
From:   Dmitry Rokosov <ddrokosov@...rdevices.ru>
To:     <neil.armstrong@...aro.org>
CC:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        <jbrunet@...libre.com>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <khilman@...libre.com>,
        <conor+dt@...nel.org>, <kernel@...rdevices.ru>,
        <sdfw_system_team@...rdevices.ru>, <rockosov@...il.com>,
        <linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Jan Dakinevich <yvdakinevich@...rdevices.ru>
Subject: Re: [PATCH v1 6/6] arm64: dts: meson: a1: add eMMC controller and
 its pins

Hello Neil,

Thank you for the review!

On Mon, Jun 26, 2023 at 03:36:23PM +0200, neil.armstrong@...aro.org wrote:
> Hi,
> 
> On 25/06/2023 23:11, Martin Blumenstingl wrote:
> > On Wed, Jun 7, 2023 at 10:16 PM Dmitry Rokosov <ddrokosov@...rdevices.ru> wrote:
> > > 
> > > From: Jan Dakinevich <yvdakinevich@...rdevices.ru>
> > > 
> > > The definition is inspired by a similar one for AXG SoC family.
> > > 'sdio_pins' and 'sdio_clk_gate_pins' pinctrls are supposed to be used as
> > > "default" and "clk-gate" in board-specific device trees.
> > Let's wait for Neil's response on the other patch for the question
> > about pin mux settings
> > 
> > > 'meson-gx' driver during initialization sets clock to safe low-frequency
> > > value (400kHz). However, both source clocks ("clkin0" and "clkin1") are
> > > high-frequency by default, and using of eMMC's internal divider is not
> > > enough to achieve so low values. To provide low-frequency source,
> > > reparent "sd_emmc_sel2" clock using 'assigned-clocks' property.
> > Even if the pinctrl part should be postponed then I think it's worth
> > adding &sd_emmc
> 
> Yeah it's weird to add HW definition and to not enable them,
> so please enable them in the board if you add them in the DTSI.

Unfortunately, I'm unable to provide our internal board DTS. However, I
have an AD401 reference board on hand, so it's possible to test
everything there. I'll include these changes in the next version.

-- 
Thank you,
Dmitry

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