linux-kernel - Re: [PATCH 1/2] dt-bindings: amlogic: Add support for GXL S805X and the P241 board

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Message-ID: <20180716220435.GA22633@rob-hp-laptop>
Date:   Mon, 16 Jul 2018 16:04:35 -0600
From:   Rob Herring <robh@...nel.org>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        martin.blumenstingl@...glemail.com
Subject: Re: [PATCH 1/2] dt-bindings: amlogic: Add support for GXL S805X and
 the P241 board

On Thu, Jul 05, 2018 at 11:50:42AM +0200, Neil Armstrong wrote:
> The S805X is a variant of the Amlogic Meson GXL SoC family with the
> following physical limitations :
> - No SDCard interface
> - No GPIOCLK pins
> - No USB OTG ID pin (but Gadget feature can stil be forced)
> - No 5V regulator
> - Reduced ADC inputs (only ADC0 and ADC1)
> - GPIODV_26, GPIOAO_3, GPIOAO_4, GPIOAO_5, GPIOAO_6, GPIOX_14,
>   GPIOX_15, GPIOH_3 are no more exposed on the package
> 
> Amlogic exposes the following SW limitations :
> - HDMI max resolution should be 1080p60, VPU clock should be downgraded
> - Video Decoding should be limited to 1080p60, VDEC clock should be downgraded
> - CPU speed should be limited by SCPI OPP table to 1.2GHz
> - DRAM interface is limited to DDR4 16bit up to 1GiB
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  Documentation/devicetree/bindings/arm/amlogic.txt | 6 ++++++
>  1 file changed, 6 insertions(+)

Reviewed-by: Rob Herring <robh@...nel.org>