linux-kernel - Re: [PATCH] memory: tegra210-emc: Support Device Tree EMC Tables

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Message-ID: <c88f59dd-2319-41d2-a21e-6fa7c205b1d0@kernel.org>
Date: Sun, 4 May 2025 18:13:30 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Aaron Kling <webgeek1234@...il.com>
Cc: Thierry Reding <thierry.reding@...il.com>,
 Jonathan Hunter <jonathanh@...dia.com>, linux-kernel@...r.kernel.org,
 linux-tegra@...r.kernel.org
Subject: Re: [PATCH] memory: tegra210-emc: Support Device Tree EMC Tables

On 04/05/2025 17:58, Aaron Kling wrote:
>>> +static int tegra210_emc_parse_dt(struct tegra210_emc *emc)
>>> +{
>>> +     struct device_node *node, *np = emc->dev->of_node;
>>> +     int ram_code, ret = 0;
>>> +
>>> +     if (!np) {
>>> +             dev_err(emc->dev, "Unable to find emc node\n");
>>> +             return -ENODEV;
>>> +     }
>>> +
>>> +     if (of_find_property(np, "nvidia,use-ram-code", NULL)) {
>>
>> I cannot find the bindings for this. Where is your DTS? Was it tested?
>>
>> It seems nothing here is documented.
> 
> The relevant nodes are filled in by the bootloader. I had hoped that
> the early stage bootloader would be able to copy that into the

It does not matter. You cannot have compatibles and ABI here without
documenting that ABI.



Best regards,
Krzysztof