linux-kernel - Re: [PATCH] ARM: dts: rockchip: Remove unnecessary setting of UART0 SCLK rate on veyron

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Date:   Thu, 11 Apr 2019 13:36:41 +0200
From:   Heiko Stuebner <heiko@...ech.de>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH] ARM: dts: rockchip: Remove unnecessary setting of UART0 SCLK rate on veyron

Am Mittwoch, 10. April 2019, 20:30:10 CEST schrieb Matthias Kaehlcke:
> Some veyron devices have a Bluetooth controller connected on UART0.
> The UART needs to operate at a high speed, however setting the clock
> rate at initialization has no practical effect. During initialization
> user space adjusts the UART baudrate multiple times, which ends up
> changing the SCLK rate. After a successful initiatalization the clk
> is running at the desired speed (48MHz).
> 
> Remove the unnecessary clock rate configuration from the DT.
> 
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>

applied for 5.2 with Doug's RB.

Thanks
Heiko