* [PATCH v2 1/2] soc/tegra: fuse: Support revision B01
2026-07-28 1:57 [PATCH v2 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Aaron Kling via B4 Relay
@ 2026-07-28 1:57 ` Aaron Kling via B4 Relay
2026-07-28 1:57 ` [PATCH v2 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
2026-07-28 12:19 ` [PATCH v2 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Mikko Perttunen
2 siblings, 0 replies; 4+ messages in thread
From: Aaron Kling via B4 Relay @ 2026-07-28 1:57 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter; +Cc: linux-tegra, linux-kernel, Aaron Kling
From: Aaron Kling <webgeek1234@gmail.com>
Previously, all supported SoCs only used the A major revision. The
Tegra210B01 SoC incremented the major revision. Add support for this.
Signed-off-by: Aaron Kling <webgeek1234@gmail.com>
---
drivers/soc/tegra/fuse/fuse-tegra.c | 1 +
drivers/soc/tegra/fuse/tegra-apbmisc.c | 51 +++++++++++++++++++++-------------
include/soc/tegra/fuse.h | 1 +
3 files changed, 33 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..a4fb0ecd15cf3 100644
--- a/drivers/soc/tegra/fuse/tegra-apbmisc.c
+++ b/drivers/soc/tegra/fuse/tegra-apbmisc.c
@@ -167,30 +167,41 @@ 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) {
+ switch (minor_rev) {
+ case 1:
+ tegra_sku_info.revision = TEGRA_REVISION_B01;
+ break;
+ default:
+ tegra_sku_info.revision = TEGRA_REVISION_UNKNOWN;
+ }
+ } 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] 4+ messages in thread* [PATCH v2 2/2] soc/tegra: fuse: speedo-tegra210: Support revision B01
2026-07-28 1:57 [PATCH v2 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Aaron Kling via B4 Relay
2026-07-28 1:57 ` [PATCH v2 1/2] soc/tegra: fuse: Support revision B01 Aaron Kling via B4 Relay
@ 2026-07-28 1:57 ` Aaron Kling via B4 Relay
2026-07-28 12:19 ` [PATCH v2 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Mikko Perttunen
2 siblings, 0 replies; 4+ messages in thread
From: Aaron Kling via B4 Relay @ 2026-07-28 1:57 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter
Cc: linux-tegra, linux-kernel, Aaron Kling, Alex Frid
From: Aaron Kling <webgeek1234@gmail.com>
Tegra210B01 has a separate set of skus and speedo tables
Based-on: https://gitlab.com/nvidia/nv-tegra/linux-5.10/-/commit/8555ef4988d3b39d91791794825c354b3c9377ba
Based-on-patch-by: Alex Frid <afrid@nvidia.com>
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 [flat|nested] 4+ messages in thread* Re: [PATCH v2 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos
2026-07-28 1:57 [PATCH v2 0/2] soc/tegra: fuse: Support Tegra210B01 Speedos Aaron Kling via B4 Relay
2026-07-28 1:57 ` [PATCH v2 1/2] soc/tegra: fuse: Support revision B01 Aaron Kling via B4 Relay
2026-07-28 1:57 ` [PATCH v2 2/2] soc/tegra: fuse: speedo-tegra210: " Aaron Kling via B4 Relay
@ 2026-07-28 12:19 ` Mikko Perttunen
2 siblings, 0 replies; 4+ messages in thread
From: Mikko Perttunen @ 2026-07-28 12:19 UTC (permalink / raw)
To: Thierry Reding, Jonathan Hunter, webgeek1234
Cc: linux-tegra, linux-kernel, Aaron Kling, Alex Frid
On Tuesday, July 28, 2026 10:57 AM Aaron Kling via B4 Relay wrote:
> 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>
> ---
> Changes in v2:
> - Update patch 1 commit messag to be more descriptive
> - Update patch 1 to set unknown revision in the major revision B code
> path if minor revision is not 1.
> - Add based-on tags to patch 2
> - Link to v1: https://lore.kernel.org/r/20260717-t210b01-speedo-v1-0-f04a8bd4d997@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 | 51 +++++++++++++++++++-------------
> include/soc/tegra/fuse.h | 1 +
> 4 files changed, 53 insertions(+), 22 deletions(-)
> ---
> base-commit: 1a1757b76427f6201bfe0bf1bea9f7574f332a93
> change-id: 20260714-t210b01-speedo-07f8cd3b3aa3
>
> Best regards,
> --
> Aaron Kling <webgeek1234@gmail.com>
>
>
>
Series
Reviewed-by: Mikko Perttunen <mperttunen@nvidia.com>
^ permalink raw reply [flat|nested] 4+ messages in thread