Re: [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01

[Jon Hunter <jonathanh@nvidia.com>]

On 21/07/2026 18:31, Aaron Kling wrote:
> On Tue, Jul 21, 2026 at 4:46 AM Jon Hunter <jonathanh@nvidia.com> wrote:
>>
>>
>> On 18/07/2026 00:19, Aaron Kling via B4 Relay wrote:
>>> From: Aaron Kling <webgeek1234@gmail.com>
>>>
>>> Tegra210B01 has a separate set of skus and speedo tables
>>>
>>> Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
>>> ---
>>>    drivers/soc/tegra/fuse/speedo-tegra210.c | 22 ++++++++++++++++++++--
>>>    1 file changed, 20 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/drivers/soc/tegra/fuse/speedo-tegra210.c b/drivers/soc/tegra/fuse/speedo-tegra210.c
>>> index 06c2bcbee5734..699751f4bd0c0 100644
>>> --- a/drivers/soc/tegra/fuse/speedo-tegra210.c
>>> +++ b/drivers/soc/tegra/fuse/speedo-tegra210.c
>>> @@ -65,7 +65,25 @@ static void __init rev_sku_to_speedo_ids(struct tegra_sku_info *sku_info,
>>>        sku_info->gpu_speedo_id = 0;
>>>        *threshold = THRESHOLD_INDEX_0;
>>>
>>> -     if (sku_info->revision >= TEGRA_REVISION_A02) {
>>> +     if (sku_info->revision >= TEGRA_REVISION_B01) {
>>> +             sku_info->gpu_speedo_id = 1;
>>> +
>>> +             switch (sku) {
>>> +             case 0x00: /* Engineering SKU */
>>> +             case 0x01: /* Engineering SKU */
>>> +             case 0x83:
>>> +                     break;
>>> +
>>> +             case 0x87:
>>> +                     sku_info->cpu_speedo_id = 3;
>>> +                     break;
>>> +
>>> +             default:
>>> +                     pr_err("Tegra210B01: unknown SKU %#04x\n", sku);
>>> +                     /* Using the default for the error case */
>>> +                     break;
>>> +             }
>>> +     } else if (sku_info->revision >= TEGRA_REVISION_A02) {
>>>                switch (sku) {
>>>                case 0x00: /* Engineering SKU */
>>>                case 0x01: /* Engineering SKU */
>>> @@ -154,7 +172,7 @@ void __init tegra210_init_speedo_data(struct tegra_sku_info *sku_info)
>>>        speedo_revision = get_speedo_revision();
>>>        pr_info("Speedo Revision %u\n", speedo_revision);
>>>
>>> -     if (speedo_revision >= 3) {
>>> +     if (sku_info->revision == TEGRA_REVISION_B01 || speedo_revision >= 3) {
>>>                sku_info->cpu_speedo_value = cpu_speedo[0];
>>>                sku_info->gpu_speedo_value = cpu_speedo[2];
>>>                sku_info->soc_speedo_value = soc_speedo[0];
>>>
>>
>> I am guessing that this is derived/ported from some kernel that NVIDIA
>> has released in the past. It would be nice to include a reference to
>> whatever change was used to create this.
> 
> It is loosely based on [0], but restructured to not change nearly as
> many lines. How would you want this referenced? Something like a
> 'based on downstream 5.10' blurb in the commit message or a direct
> reference to the commit somehow?

Commit d93f8399053dcf117ff56a3029ff08c0e36f4b75 uses ...

Based-on: 
https://lore.kernel.org/r/7703024f-8882-9eec-a122-599871728a89@gmail.com
Based-on-patch-by: Heiner Kallweit <hkallweit1@gmail.com>

So this would be fine.

Jon

-- 
nvpublic