* [PATCH 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos
@ 2026-07-17 23:19 Aaron Kling via B4 Relay
2026-07-17 23:19 ` [PATCH 1/2] soc/tegra: fuse: Support revision B01 Aaron Kling via B4 Relay
2026-07-17 23:19 ` [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
0 siblings, 2 replies; 8+ messages in thread
From: Aaron Kling via B4 Relay @ 2026-07-17 23:19 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter; +Cc: linux-tegra, linux-kernel, Aaron Kling
This series adds support for the b01 fuse revision, then adds speedo
support for known Tegra210B01 sku's.
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
Aaron Kling (2):
soc/tegra: fuse: Support revision B01
soc/tegra: fuse: speedo-tegra210: Support revision B01
drivers/soc/tegra/fuse/fuse-tegra.c | 1 +
drivers/soc/tegra/fuse/speedo-tegra210.c | 22 ++++++++++++++--
drivers/soc/tegra/fuse/tegra-apbmisc.c | 45 ++++++++++++++++++--------------
include/soc/tegra/fuse.h | 1 +
4 files changed, 47 insertions(+), 22 deletions(-)
---
base-commit: 1a1757b76427f6201bfe0bf1bea9f7574f332a93
change-id: 20260714-t210b01-speedo-07f8cd3b3aa3
Best regards,
--
Aaron Kling <webgeek1234@gmail.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH 1/2] soc/tegra: fuse: Support revision B01
2026-07-17 23:19 [PATCH 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Aaron Kling via B4 Relay
@ 2026-07-17 23:19 ` Aaron Kling via B4 Relay
2026-07-21 7:37 ` Mikko Perttunen
2026-07-17 23:19 ` [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
1 sibling, 1 reply; 8+ messages in thread
From: Aaron Kling via B4 Relay @ 2026-07-17 23:19 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter; +Cc: linux-tegra, linux-kernel, Aaron Kling
From: Aaron Kling <webgeek1234@gmail.com>
This is used by Tegra210B01
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
drivers/soc/tegra/fuse/fuse-tegra.c | 1 +
drivers/soc/tegra/fuse/tegra-apbmisc.c | 45 +++++++++++++++++++---------------
include/soc/tegra/fuse.h | 1 +
3 files changed, 27 insertions(+), 20 deletions(-)
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
index 78b054d43a422..a37642dc92c61 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra.c
@@ -34,6 +34,7 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
[TEGRA_REVISION_A03] = "A03",
[TEGRA_REVISION_A03p] = "A03 prime",
[TEGRA_REVISION_A04] = "A04",
+ [TEGRA_REVISION_B01] = "B01",
};
static const char *tegra_platform_name[TEGRA_PLATFORM_MAX] = {
diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
index 6af69ccaa295c..8df3bcd148ba7 100644
--- a/drivers/soc/tegra/fuse/tegra-apbmisc.c
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -167,30 +167,35 @@ static const struct of_device_id apbmisc_match[] __initconst = {
void __init tegra_init_revision(void)
{
- u8 chip_id, minor_rev;
+ u8 chip_id, major_rev, minor_rev;
chip_id = tegra_get_chip_id();
+ major_rev = tegra_get_major_rev();
minor_rev = tegra_get_minor_rev();
- switch (minor_rev) {
- case 1:
- tegra_sku_info.revision = TEGRA_REVISION_A01;
- break;
- case 2:
- tegra_sku_info.revision = TEGRA_REVISION_A02;
- break;
- case 3:
- if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) ||
- tegra_fuse_read_spare(19)))
- tegra_sku_info.revision = TEGRA_REVISION_A03p;
- else
- tegra_sku_info.revision = TEGRA_REVISION_A03;
- break;
- case 4:
- tegra_sku_info.revision = TEGRA_REVISION_A04;
- break;
- default:
- tegra_sku_info.revision = TEGRA_REVISION_UNKNOWN;
+ if (major_rev > 1) {
+ tegra_sku_info.revision = TEGRA_REVISION_B01;
+ } else {
+ switch (minor_rev) {
+ case 1:
+ tegra_sku_info.revision = TEGRA_REVISION_A01;
+ break;
+ case 2:
+ tegra_sku_info.revision = TEGRA_REVISION_A02;
+ break;
+ case 3:
+ if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) ||
+ tegra_fuse_read_spare(19)))
+ tegra_sku_info.revision = TEGRA_REVISION_A03p;
+ else
+ tegra_sku_info.revision = TEGRA_REVISION_A03;
+ break;
+ case 4:
+ tegra_sku_info.revision = TEGRA_REVISION_A04;
+ break;
+ default:
+ tegra_sku_info.revision = TEGRA_REVISION_UNKNOWN;
+ }
}
tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO);
diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h
index 8f421b9f7585c..30db79f7f17fd 100644
--- a/include/soc/tegra/fuse.h
+++ b/include/soc/tegra/fuse.h
@@ -33,6 +33,7 @@ enum tegra_revision {
TEGRA_REVISION_A03,
TEGRA_REVISION_A03p,
TEGRA_REVISION_A04,
+ TEGRA_REVISION_B01,
TEGRA_REVISION_MAX,
};
--
2.54.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01
2026-07-17 23:19 [PATCH 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Aaron Kling via B4 Relay
2026-07-17 23:19 ` [PATCH 1/2] soc/tegra: fuse: Support revision B01 Aaron Kling via B4 Relay
@ 2026-07-17 23:19 ` Aaron Kling via B4 Relay
2026-07-21 7:43 ` Mikko Perttunen
2026-07-21 9:46 ` Jon Hunter
1 sibling, 2 replies; 8+ messages in thread
From: Aaron Kling via B4 Relay @ 2026-07-17 23:19 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter; +Cc: linux-tegra, linux-kernel, Aaron Kling
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];
--
2.54.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH 1/2] soc/tegra: fuse: Support revision B01
2026-07-17 23:19 ` [PATCH 1/2] soc/tegra: fuse: Support revision B01 Aaron Kling via B4 Relay
@ 2026-07-21 7:37 ` Mikko Perttunen
0 siblings, 0 replies; 8+ messages in thread
From: Mikko Perttunen @ 2026-07-21 7:37 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter, webgeek1234
Cc: linux-tegra, linux-kernel, Aaron Kling
On Saturday, July 18, 2026 8:19 AM Aaron Kling via B4 Relay wrote:
> From: Aaron Kling <webgeek1234@gmail.com>
>
> This is used by Tegra210B01
Please describe the change in full in the commit message, don't continue
the paragraph from the subject.
>
> Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
> ---
> drivers/soc/tegra/fuse/fuse-tegra.c | 1 +
> drivers/soc/tegra/fuse/tegra-apbmisc.c | 45 +++++++++++++++++++---------------
> include/soc/tegra/fuse.h | 1 +
> 3 files changed, 27 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c
> index 78b054d43a422..a37642dc92c61 100644
> --- a/drivers/soc/tegra/fuse/fuse-tegra.c
> +++ b/drivers/soc/tegra/fuse/fuse-tegra.c
> @@ -34,6 +34,7 @@ static const char *tegra_revision_name[TEGRA_REVISION_MAX] = {
> [TEGRA_REVISION_A03] = "A03",
> [TEGRA_REVISION_A03p] = "A03 prime",
> [TEGRA_REVISION_A04] = "A04",
> + [TEGRA_REVISION_B01] = "B01",
> };
>
> static const char *tegra_platform_name[TEGRA_PLATFORM_MAX] = {
> diff --git a/drivers/soc/tegra/fuse/tegra-apbmisc.c b/drivers/soc/tegra/fuse/tegra-apbmisc.c
> index 6af69ccaa295c..8df3bcd148ba7 100644
> --- a/drivers/soc/tegra/fuse/tegra-apbmisc.c
> +++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
> @@ -167,30 +167,35 @@ static const struct of_device_id apbmisc_match[] __initconst = {
>
> void __init tegra_init_revision(void)
> {
> - u8 chip_id, minor_rev;
> + u8 chip_id, major_rev, minor_rev;
>
> chip_id = tegra_get_chip_id();
> + major_rev = tegra_get_major_rev();
> minor_rev = tegra_get_minor_rev();
>
> - switch (minor_rev) {
> - case 1:
> - tegra_sku_info.revision = TEGRA_REVISION_A01;
> - break;
> - case 2:
> - tegra_sku_info.revision = TEGRA_REVISION_A02;
> - break;
> - case 3:
> - if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) ||
> - tegra_fuse_read_spare(19)))
> - tegra_sku_info.revision = TEGRA_REVISION_A03p;
> - else
> - tegra_sku_info.revision = TEGRA_REVISION_A03;
> - break;
> - case 4:
> - tegra_sku_info.revision = TEGRA_REVISION_A04;
> - break;
> - default:
> - tegra_sku_info.revision = TEGRA_REVISION_UNKNOWN;
> + if (major_rev > 1) {
> + tegra_sku_info.revision = TEGRA_REVISION_B01;
To match the A revisions, I think better to check minor_rev as well and
set to UNKNOWN if it's not as expected.
Thank you!
Mikko
> + } else {
> + switch (minor_rev) {
> + case 1:
> + tegra_sku_info.revision = TEGRA_REVISION_A01;
> + break;
> + case 2:
> + tegra_sku_info.revision = TEGRA_REVISION_A02;
> + break;
> + case 3:
> + if (chip_id == TEGRA20 && (tegra_fuse_read_spare(18) ||
> + tegra_fuse_read_spare(19)))
> + tegra_sku_info.revision = TEGRA_REVISION_A03p;
> + else
> + tegra_sku_info.revision = TEGRA_REVISION_A03;
> + break;
> + case 4:
> + tegra_sku_info.revision = TEGRA_REVISION_A04;
> + break;
> + default:
> + tegra_sku_info.revision = TEGRA_REVISION_UNKNOWN;
> + }
> }
>
> tegra_sku_info.sku_id = tegra_fuse_read_early(FUSE_SKU_INFO);
> diff --git a/include/soc/tegra/fuse.h b/include/soc/tegra/fuse.h
> index 8f421b9f7585c..30db79f7f17fd 100644
> --- a/include/soc/tegra/fuse.h
> +++ b/include/soc/tegra/fuse.h
> @@ -33,6 +33,7 @@ enum tegra_revision {
> TEGRA_REVISION_A03,
> TEGRA_REVISION_A03p,
> TEGRA_REVISION_A04,
> + TEGRA_REVISION_B01,
> TEGRA_REVISION_MAX,
> };
>
>
> --
> 2.54.0
>
>
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01
2026-07-17 23:19 ` [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
@ 2026-07-21 7:43 ` Mikko Perttunen
2026-07-21 9:46 ` Jon Hunter
1 sibling, 0 replies; 8+ messages in thread
From: Mikko Perttunen @ 2026-07-21 7:43 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter, webgeek1234
Cc: linux-tegra, linux-kernel, Aaron Kling
On Saturday, July 18, 2026 8:19 AM 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];
>
> --
> 2.54.0
>
>
>
Thanks!
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01
2026-07-17 23:19 ` [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
2026-07-21 7:43 ` Mikko Perttunen
@ 2026-07-21 9:46 ` Jon Hunter
2026-07-21 17:31 ` Aaron Kling
1 sibling, 1 reply; 8+ messages in thread
From: Jon Hunter @ 2026-07-21 9:46 UTC (permalink / raw)
To: webgeek1234, Thierry Reding; +Cc: linux-tegra, linux-kernel
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.
Jon
--
nvpublic
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01
2026-07-21 9:46 ` Jon Hunter
@ 2026-07-21 17:31 ` Aaron Kling
2026-07-22 12:44 ` Jon Hunter
0 siblings, 1 reply; 8+ messages in thread
From: Aaron Kling @ 2026-07-21 17:31 UTC (permalink / raw)
To: Jon Hunter; +Cc: Thierry Reding, linux-tegra, linux-kernel
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?
Aaron
[0] https://gitlab.com/nvidia/nv-tegra/linux-5.10/-/commit/8555ef4988d3b39d91791794825c354b3c9377ba
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01
2026-07-21 17:31 ` Aaron Kling
@ 2026-07-22 12:44 ` Jon Hunter
0 siblings, 0 replies; 8+ messages in thread
From: Jon Hunter @ 2026-07-22 12:44 UTC (permalink / raw)
To: Aaron Kling; +Cc: Thierry Reding, linux-tegra, linux-kernel
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
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2026-07-22 12:44 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-07-17 23:19 [PATCH 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Aaron Kling via B4 Relay
2026-07-17 23:19 ` [PATCH 1/2] soc/tegra: fuse: Support revision B01 Aaron Kling via B4 Relay
2026-07-21 7:37 ` Mikko Perttunen
2026-07-17 23:19 ` [PATCH 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
2026-07-21 7:43 ` Mikko Perttunen
2026-07-21 9:46 ` Jon Hunter
2026-07-21 17:31 ` Aaron Kling
2026-07-22 12:44 ` Jon Hunter
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