linux-kernel - Re: [PATCH V5 12/16] arm64: tegra: Add P2U and PCIe controller nodes to Tegra194 DT

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Message-ID: <20190503112637.GF32400@ulmo>
Date:   Fri, 3 May 2019 13:26:37 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Vidya Sagar <vidyas@...dia.com>
Cc:     lorenzo.pieralisi@....com, bhelgaas@...gle.com, robh+dt@...nel.org,
        mark.rutland@....com, jonathanh@...dia.com, kishon@...com,
        catalin.marinas@....com, will.deacon@....com, jingoohan1@...il.com,
        gustavo.pimentel@...opsys.com, mperttunen@...dia.com,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kthota@...dia.com,
        mmaddireddy@...dia.com, sagar.tv@...il.com
Subject: Re: [PATCH V5 12/16] arm64: tegra: Add P2U and PCIe controller nodes
 to Tegra194 DT

On Wed, Apr 24, 2019 at 10:50:00AM +0530, Vidya Sagar wrote:
> Add P2U (PIPE to UPHY) and PCIe controller nodes to device tree.
> The Tegra194 SoC contains six PCIe controllers and twenty P2U instances
> grouped into two different PHY bricks namely High-Speed IO (HSIO-12 P2Us)
> and NVIDIA High Speed (NVHS-8 P2Us) respectively.
> 
> Signed-off-by: Vidya Sagar <vidyas@...dia.com>
> ---
> Changes since [v4]:
> * None
> 
> Changes since [v3]:
> * None
> 
> Changes since [v2]:
> * Included 'hsio' or 'nvhs' in P2U node's label names to reflect which brick
>   they belong to
> * Removed leading zeros in unit address
> 
> Changes since [v1]:
> * Flattened all P2U nodes by removing 'hsio-p2u' and 'nvhs-p2u' super nodes
> * Changed P2U nodes compatible string from 'nvidia,tegra194-phy-p2u' to 'nvidia,tegra194-p2u'
> * Changed reg-name from 'base' to 'ctl'
> * Updated all PCIe nodes according to the changes made to DT documentation file
> 
>  arch/arm64/boot/dts/nvidia/tegra194.dtsi | 449 +++++++++++++++++++++++
>  1 file changed, 449 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> index c77ca211fa8f..dc433b446ff5 100644
> --- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
> +++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
[...]
> +	pcie@...80000 {
[...]
> +		ranges = <0x81000000 0x0 0x38100000 0x0 0x38100000 0x0 0x00100000    /* downstream I/O (1MB) */
> +			  0xc2000000 0x18 0x00000000 0x18 0x00000000 0x3 0x40000000  /* prefetchable memory (13GB) */
> +			  0x82000000 0x0 0x40000000 0x1B 0x40000000 0x0 0xC0000000>; /* non-prefetchable memory (3GB) */

Please be consistent in the capitalization of hexadecimal numbers. You
use lowercase hexdigits in one place and upprecase in others. Just stick
to one (preferably lowercase since that's already used elsewhere in this
file).

> +	};
> +
> +	pcie@...00000 {

Also, entries should be sorted by unit-address, so controller 0 above
needs to go further down.

Thierry

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