* [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver
@ 2026-05-20 14:27 Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration Gregor Herburger
` (7 more replies)
0 siblings, 8 replies; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger, Conor Dooley
Hi,
This series adds support for the Raspberry Pis OTP registers. The
Raspberry Pi has one or more OTP regions. These registers are accessible
through the firmware. Add a driver for it and add updates the devicetree
for the Raspberry Pi 5.
---
Changes in v5:
- Move alignment check to nvmem core
- Use IS_REACHABLE to simplify Kconfig
- use root_only for private driver
- Add driver as module to arch64 defconfig
- Use MODULE_DEVICE_TABLE
- Remove some unused attributes, fix typos, minor fixups
- Link to v4: https://patch.msgid.link/20260508-rpi-otp-driver-v4-0-cf8d725d8821@linutronix.de
Changes in v4:
- Additional patch to drop unnecessary select schema
- fix dt-bindings
- use __counted_by_le
- additional alignment check in read/write callbacks
- Link to v3: https://patch.msgid.link/20260506-rpi-otp-driver-v3-0-294602663695@linutronix.de
Changes in v3:
- dts: add "raspberrypi,bcm2835-firmware" as fallback and fix dt-bindings
- Fix Kconfig depends
- Changed firmware data fields to __le32
- Add MODULE_ALIAS
- Link to v2: https://patch.msgid.link/20260505-rpi-otp-driver-v2-0-e9176ec72837@linutronix.de
Changes in v2:
- register nvmem driver from firmware driver and drop firmware sub nodes
- Use struct_size and __counted_by for dynamic array
- Drop unneeded comment in Kconfig
- Use NVMEM_DEVID_NONE
- Use kzalloc
- Update module description
- Link to v1: https://patch.msgid.link/20260408-rpi-otp-driver-v1-0-e02d1dbe6008@linutronix.de
---
Gregor Herburger (8):
soc: bcm2835: Use IS_REACHABLE for function declaration
nvmem: core: Enforce stride and alignment checks for nvmem_device functions
dt-bindings: raspberrypi,bcm2835-firmware: Add bcm2712-firmware compatible
nvmem: Add the Raspberry Pi OTP driver
firmware: raspberrypi: register nvmem driver
arm64: dts: broadcom: bcm2712: add raspberrypi,bcm2712-firmware compatible
dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select
arm64: defconfig: Enable the raspberrypi otp driver as module
.../arm/bcm/raspberrypi,bcm2835-firmware.yaml | 20 ++--
.../boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi | 4 +-
arch/arm64/configs/defconfig | 1 +
drivers/firmware/raspberrypi.c | 59 +++++++++-
drivers/nvmem/Kconfig | 11 ++
drivers/nvmem/Makefile | 1 +
drivers/nvmem/core.c | 12 ++
drivers/nvmem/raspberrypi-otp.c | 130 +++++++++++++++++++++
include/soc/bcm2835/raspberrypi-firmware.h | 17 ++-
9 files changed, 240 insertions(+), 15 deletions(-)
---
base-commit: f3e6330d7fe42b204af05a2dbc68b379e0ad179e
change-id: 20260408-rpi-otp-driver-75fce1dcff7d
Best regards,
--
Gregor Herburger <gregor.herburger@linutronix•de>
^ permalink raw reply [flat|nested] 15+ messages in thread
* [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-21 14:32 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 2/8] nvmem: core: Enforce stride and alignment checks for nvmem_device functions Gregor Herburger
` (6 subsequent siblings)
7 siblings, 1 reply; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger
The drivers that depend on the RASPBERRYPI_FIRMWARE use
depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
This should ensure that the driver is not compiled in when
RASPBERRYPI_FIRMWARE is 'm' on COMPILE_TEST which leads to linker
errors.
The same can be achieved by using IS_REACHABLE in the
raspberrypi-firmware header. This evaluates to false when invoked from
built-in code. This way the Kconfig can be written as
depends on RASPBERRYPI_FIRMWARE || COMPILE_TEST
Which is a more readable variant.
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
include/soc/bcm2835/raspberrypi-firmware.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index e1f87fbfe5542..eb33838e0cd10 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -174,7 +174,7 @@ struct rpi_firmware_clk_rate_request {
.id = cpu_to_le32(_id), \
}
-#if IS_ENABLED(CONFIG_RASPBERRYPI_FIRMWARE)
+#if IS_REACHABLE(CONFIG_RASPBERRYPI_FIRMWARE)
int rpi_firmware_property(struct rpi_firmware *fw,
u32 tag, void *data, size_t len);
int rpi_firmware_property_list(struct rpi_firmware *fw,
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 2/8] nvmem: core: Enforce stride and alignment checks for nvmem_device functions
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-21 14:32 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 3/8] dt-bindings: raspberrypi,bcm2835-firmware: Add bcm2712-firmware compatible Gregor Herburger
` (5 subsequent siblings)
7 siblings, 1 reply; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger
The stride and word_size attributes in the nvmem_config struct are
currently only used when reading/writing through sysfs functions
bin_attr_nvmem_read/bin_attr_nvmem_write and in the nvmem_cell api.
Reads and writes with nvmem_device_write/nvmem_device_read still allow
unaligned access.
Add a check to these functions to enforce word_size and stride_length
aligned reads and writes.
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
drivers/nvmem/core.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 311cb2e5a5c02..6b313f63d07ef 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -2068,6 +2068,12 @@ int nvmem_device_read(struct nvmem_device *nvmem,
if (!nvmem)
return -EINVAL;
+ if (!IS_ALIGNED(offset, nvmem->stride))
+ return -EINVAL;
+
+ if (!IS_ALIGNED(bytes, nvmem->word_size))
+ return -EINVAL;
+
rc = nvmem_reg_read(nvmem, offset, buf, bytes);
if (rc)
@@ -2096,6 +2102,12 @@ int nvmem_device_write(struct nvmem_device *nvmem,
if (!nvmem)
return -EINVAL;
+ if (!IS_ALIGNED(offset, nvmem->stride))
+ return -EINVAL;
+
+ if (!IS_ALIGNED(bytes, nvmem->word_size))
+ return -EINVAL;
+
rc = nvmem_reg_write(nvmem, offset, buf, bytes);
if (rc)
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 3/8] dt-bindings: raspberrypi,bcm2835-firmware: Add bcm2712-firmware compatible
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 2/8] nvmem: core: Enforce stride and alignment checks for nvmem_device functions Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 4/8] nvmem: Add the Raspberry Pi OTP driver Gregor Herburger
` (4 subsequent siblings)
7 siblings, 0 replies; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Conor Dooley, Gregor Herburger
Add a compatible string for the bcm2712 firmware. The bcm2712-firmware
is compatible with the bcm2835-firmware so allow the bcm2835-firmware as
fallback.
Acked-by: Conor Dooley <conor.dooley@microchip•com>
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
.../bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
index 983ea80eaec97..a3a5243b91706 100644
--- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
@@ -21,9 +21,14 @@ select:
properties:
compatible:
- items:
- - const: raspberrypi,bcm2835-firmware
- - const: simple-mfd
+ oneOf:
+ - items:
+ - const: raspberrypi,bcm2835-firmware
+ - const: simple-mfd
+ - items:
+ - const: raspberrypi,bcm2712-firmware
+ - const: raspberrypi,bcm2835-firmware
+ - const: simple-mfd
mboxes:
maxItems: 1
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 4/8] nvmem: Add the Raspberry Pi OTP driver
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
` (2 preceding siblings ...)
2026-05-20 14:27 ` [PATCH v5 3/8] dt-bindings: raspberrypi,bcm2835-firmware: Add bcm2712-firmware compatible Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-21 14:34 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 5/8] firmware: raspberrypi: register nvmem driver Gregor Herburger
` (3 subsequent siblings)
7 siblings, 1 reply; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger
Raspberry Pis have OTP registers which can be accessed through the
videocore firmware. Add a nvmem driver to support these OTP registers.
Reviewed-by: Stefan Wahren <wahrenst@gmx•net>
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
drivers/nvmem/Kconfig | 11 +++
drivers/nvmem/Makefile | 1 +
drivers/nvmem/raspberrypi-otp.c | 130 +++++++++++++++++++++++++++++
include/soc/bcm2835/raspberrypi-firmware.h | 10 +++
4 files changed, 152 insertions(+)
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
index 74ddbd0f79b0e..a1922b48d0c2e 100644
--- a/drivers/nvmem/Kconfig
+++ b/drivers/nvmem/Kconfig
@@ -483,4 +483,15 @@ config NVMEM_QORIQ_EFUSE
This driver can also be built as a module. If so, the module
will be called nvmem_qoriq_efuse.
+config NVMEM_RASPBERRYPI_OTP
+ tristate "Raspberry Pi OTP support"
+ depends on RASPBERRYPI_FIRMWARE || COMPILE_TEST
+ help
+ This driver provides access to the Raspberry Pi OTP memory via the
+ nvmem subsystem. The driver supports the customer OTP as well as the
+ device specific private key OTP (BCM2712 only).
+
+ This driver can also be built as a module. If so, the module
+ will be called raspberrypi-otp.
+
endif
diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile
index 7252b8ec88d46..8ca2095e068f3 100644
--- a/drivers/nvmem/Makefile
+++ b/drivers/nvmem/Makefile
@@ -95,3 +95,4 @@ obj-$(CONFIG_NVMEM_ZYNQMP) += nvmem_zynqmp_nvmem.o
nvmem_zynqmp_nvmem-y := zynqmp_nvmem.o
obj-$(CONFIG_NVMEM_QORIQ_EFUSE) += nvmem-qoriq-efuse.o
nvmem-qoriq-efuse-y := qoriq-efuse.o
+obj-$(CONFIG_NVMEM_RASPBERRYPI_OTP) += raspberrypi-otp.o
diff --git a/drivers/nvmem/raspberrypi-otp.c b/drivers/nvmem/raspberrypi-otp.c
new file mode 100644
index 0000000000000..3c24548267219
--- /dev/null
+++ b/drivers/nvmem/raspberrypi-otp.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/nvmem-provider.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <soc/bcm2835/raspberrypi-firmware.h>
+
+struct rpi_otp_priv {
+ struct rpi_firmware *fw;
+ u32 read_tag;
+ u32 write_tag;
+};
+
+struct rpi_otp_header {
+ __le32 start;
+ __le32 count;
+ __le32 data[] __counted_by_le(count);
+};
+
+static int rpi_otp_read(void *context, unsigned int offset, void *buf, size_t bytes)
+{
+ struct rpi_otp_priv *priv = context;
+ struct rpi_otp_header *fwbuf;
+ u32 count;
+ int ret;
+
+ count = bytes / 4;
+
+ fwbuf = kzalloc(struct_size(fwbuf, data, count), GFP_KERNEL);
+ if (!fwbuf)
+ return -ENOMEM;
+
+ fwbuf->start = cpu_to_le32(offset / 4);
+ fwbuf->count = cpu_to_le32(count);
+
+ ret = rpi_firmware_property(priv->fw, priv->read_tag, fwbuf,
+ sizeof(struct rpi_otp_header) + bytes);
+ if (ret)
+ goto out;
+
+ memcpy(buf, fwbuf->data, bytes);
+
+out:
+ kfree(fwbuf);
+ return ret;
+}
+
+static int rpi_otp_write(void *context, unsigned int offset, void *val, size_t bytes)
+{
+ struct rpi_otp_priv *priv = context;
+ struct rpi_otp_header *fwbuf;
+ u32 count;
+ int ret;
+
+ count = bytes / 4;
+
+ fwbuf = kzalloc(struct_size(fwbuf, data, count), GFP_KERNEL);
+ if (!fwbuf)
+ return -ENOMEM;
+
+ fwbuf->start = cpu_to_le32(offset / 4);
+ fwbuf->count = cpu_to_le32(count);
+ memcpy(fwbuf->data, val, bytes);
+
+ ret = rpi_firmware_property(priv->fw, priv->write_tag, fwbuf,
+ sizeof(struct rpi_otp_header) + bytes);
+
+ kfree(fwbuf);
+ return ret;
+}
+
+static int rpi_otp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct nvmem_device *nvmem;
+ struct rpi_otp_priv *priv;
+ const struct rpi_otp_driver_data *data;
+ struct nvmem_config config = {
+ .read_only = false,
+ .word_size = 4,
+ .stride = 4,
+ .reg_read = rpi_otp_read,
+ .reg_write = rpi_otp_write,
+ .id = NVMEM_DEVID_NONE,
+ };
+
+ data = dev_get_platdata(dev);
+ if (!data)
+ return -ENODEV;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->fw = dev_get_drvdata(dev->parent);
+ priv->read_tag = data->read_tag;
+ priv->write_tag = data->write_tag;
+ config.dev = dev;
+ config.priv = priv;
+ config.name = data->name;
+ config.size = data->size;
+ config.root_only = data->root_only;
+
+ nvmem = devm_nvmem_register(dev, &config);
+ if (IS_ERR(nvmem))
+ return dev_err_probe(dev, PTR_ERR(nvmem), "error registering nvmem config\n");
+
+ return 0;
+}
+
+static const struct platform_device_id raspberrypi_otp_id[] = {
+ { "raspberrypi-otp" },
+ {},
+};
+MODULE_DEVICE_TABLE(platform, raspberrypi_otp_id);
+
+static struct platform_driver raspberrypi_otp_driver = {
+ .probe = rpi_otp_probe,
+ .driver = {
+ .name = "raspberrypi-otp",
+ },
+ .id_table = raspberrypi_otp_id,
+};
+module_platform_driver(raspberrypi_otp_driver);
+
+MODULE_AUTHOR("Gregor Herburger <gregor.herburger@linutronix•de>");
+MODULE_DESCRIPTION("Raspberry Pi OTP driver");
+MODULE_LICENSE("GPL");
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index eb33838e0cd10..1e5e5f7e378d0 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -92,6 +92,8 @@ enum rpi_firmware_property_tag {
RPI_FIRMWARE_SET_POE_HAT_VAL = 0x00030050,
RPI_FIRMWARE_NOTIFY_XHCI_RESET = 0x00030058,
RPI_FIRMWARE_NOTIFY_DISPLAY_DONE = 0x00030066,
+ RPI_FIRMWARE_GET_PRIVATE_OTP = 0x00030081,
+ RPI_FIRMWARE_SET_PRIVATE_OTP = 0x00038081,
/* Dispmanx TAGS */
RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE = 0x00040001,
@@ -174,6 +176,14 @@ struct rpi_firmware_clk_rate_request {
.id = cpu_to_le32(_id), \
}
+struct rpi_otp_driver_data {
+ const char *name;
+ u32 read_tag;
+ u32 write_tag;
+ int size;
+ bool root_only;
+};
+
#if IS_REACHABLE(CONFIG_RASPBERRYPI_FIRMWARE)
int rpi_firmware_property(struct rpi_firmware *fw,
u32 tag, void *data, size_t len);
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 5/8] firmware: raspberrypi: register nvmem driver
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
` (3 preceding siblings ...)
2026-05-20 14:27 ` [PATCH v5 4/8] nvmem: Add the Raspberry Pi OTP driver Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-21 14:38 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 6/8] arm64: dts: broadcom: bcm2712: add raspberrypi,bcm2712-firmware compatible Gregor Herburger
` (2 subsequent siblings)
7 siblings, 1 reply; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger
The Raspberry Pi firmware exposes two regions with otp registers. The
first region called "customer otp" is available on all Raspberry Pi
models. The second is only available on the Raspberry Pi 5 (bcm2712).
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
drivers/firmware/raspberrypi.c | 59 +++++++++++++++++++++++++++++-
include/soc/bcm2835/raspberrypi-firmware.h | 5 +++
2 files changed, 63 insertions(+), 1 deletion(-)
diff --git a/drivers/firmware/raspberrypi.c b/drivers/firmware/raspberrypi.c
index 0aa322e9a2e73..e24636feae0ea 100644
--- a/drivers/firmware/raspberrypi.c
+++ b/drivers/firmware/raspberrypi.c
@@ -24,12 +24,15 @@
static struct platform_device *rpi_hwmon;
static struct platform_device *rpi_clk;
+static struct platform_device *rpi_otp_customer;
+static struct platform_device *rpi_otp_private;
struct rpi_firmware {
struct mbox_client cl;
struct mbox_chan *chan; /* The property channel. */
struct completion c;
u32 enabled;
+ enum rpi_firmware_soc soc;
struct kref consumers;
};
@@ -231,6 +234,47 @@ static void rpi_register_clk_driver(struct device *dev)
-1, NULL, 0);
}
+static const struct rpi_otp_driver_data rpi_otp_customer_data = {
+ .name = "rpi-otp-customer",
+ .read_tag = RPI_FIRMWARE_GET_CUSTOMER_OTP,
+ .write_tag = RPI_FIRMWARE_SET_CUSTOMER_OTP,
+ .size = 32,
+ .root_only = false,
+};
+
+static const struct rpi_otp_driver_data rpi_otp_private_data = {
+ .name = "rpi-otp-private",
+ .read_tag = RPI_FIRMWARE_GET_PRIVATE_OTP,
+ .write_tag = RPI_FIRMWARE_SET_PRIVATE_OTP,
+ .size = 32,
+ .root_only = true,
+};
+
+static void rpi_register_otp_driver(struct device *dev)
+{
+ struct rpi_firmware *fw = dev_get_drvdata(dev);
+
+ rpi_otp_customer = platform_device_register_data(dev, "raspberrypi-otp",
+ PLATFORM_DEVID_AUTO,
+ &rpi_otp_customer_data,
+ sizeof(rpi_otp_customer_data));
+
+ if (IS_ERR(rpi_otp_customer))
+ dev_err(dev, "Failed to register customer OTP device: %ld\n",
+ PTR_ERR(rpi_otp_customer));
+
+ if (fw->soc == RPI_FIRMWARE_SOC_BCM2712) {
+ rpi_otp_private = platform_device_register_data(dev, "raspberrypi-otp",
+ PLATFORM_DEVID_AUTO,
+ &rpi_otp_private_data,
+ sizeof(rpi_otp_private_data));
+
+ if (IS_ERR(rpi_otp_private))
+ dev_err(dev, "Failed to register private OTP device: %ld\n",
+ PTR_ERR(rpi_otp_private));
+ }
+}
+
unsigned int rpi_firmware_clk_get_max_rate(struct rpi_firmware *fw, unsigned int id)
{
struct rpi_firmware_clk_rate_request msg =
@@ -299,12 +343,14 @@ static int rpi_firmware_probe(struct platform_device *pdev)
init_completion(&fw->c);
kref_init(&fw->consumers);
+ fw->soc = (uintptr_t)device_get_match_data(dev);
platform_set_drvdata(pdev, fw);
rpi_firmware_print_firmware_revision(fw);
rpi_register_hwmon_driver(dev, fw);
rpi_register_clk_driver(dev);
+ rpi_register_otp_driver(dev);
return 0;
}
@@ -327,12 +373,23 @@ static void rpi_firmware_remove(struct platform_device *pdev)
rpi_hwmon = NULL;
platform_device_unregister(rpi_clk);
rpi_clk = NULL;
+ platform_device_unregister(rpi_otp_customer);
+ rpi_otp_customer = NULL;
+ platform_device_unregister(rpi_otp_private);
+ rpi_otp_private = NULL;
rpi_firmware_put(fw);
}
static const struct of_device_id rpi_firmware_of_match[] = {
- { .compatible = "raspberrypi,bcm2835-firmware", },
+ {
+ .compatible = "raspberrypi,bcm2835-firmware",
+ .data = (void *)RPI_FIRMWARE_SOC_BCM2835,
+ },
+ {
+ .compatible = "raspberrypi,bcm2712-firmware",
+ .data = (void *)RPI_FIRMWARE_SOC_BCM2712,
+ },
{},
};
MODULE_DEVICE_TABLE(of, rpi_firmware_of_match);
diff --git a/include/soc/bcm2835/raspberrypi-firmware.h b/include/soc/bcm2835/raspberrypi-firmware.h
index 1e5e5f7e378d0..a4c94b85b7aa9 100644
--- a/include/soc/bcm2835/raspberrypi-firmware.h
+++ b/include/soc/bcm2835/raspberrypi-firmware.h
@@ -9,6 +9,11 @@
#include <linux/types.h>
#include <linux/of_device.h>
+enum rpi_firmware_soc {
+ RPI_FIRMWARE_SOC_BCM2835,
+ RPI_FIRMWARE_SOC_BCM2712,
+};
+
struct rpi_firmware;
enum rpi_firmware_property_status {
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 6/8] arm64: dts: broadcom: bcm2712: add raspberrypi,bcm2712-firmware compatible
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
` (4 preceding siblings ...)
2026-05-20 14:27 ` [PATCH v5 5/8] firmware: raspberrypi: register nvmem driver Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 7/8] dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select Gregor Herburger
2026-05-20 14:28 ` [PATCH v5 8/8] arm64: defconfig: Enable the raspberrypi otp driver as module Gregor Herburger
7 siblings, 0 replies; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger
The Raspberry Pi 5 (BCM2712) firmware exposes additional features such
as the additional OTP register region called 'private OTP'.
Add the raspberrypi,bcm2712-firmware compatible to allow drivers to
distinguish this hardware variant while keeping
raspberrypi,bcm2835-firmware as a fallback for backward compatibility
with existing drivers.
Reviewed-by: Stefan Wahren <wahrenst@gmx•net>
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi
index b7a6bc34ae1ab..4aa8ec7601b84 100644
--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi
+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-base.dtsi
@@ -46,7 +46,9 @@ power_button: power-button {
firmware {
firmware: rpi-firmware {
- compatible = "raspberrypi,bcm2835-firmware", "simple-mfd";
+ compatible = "raspberrypi,bcm2712-firmware",
+ "raspberrypi,bcm2835-firmware",
+ "simple-mfd";
mboxes = <&mailbox>;
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 7/8] dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
` (5 preceding siblings ...)
2026-05-20 14:27 ` [PATCH v5 6/8] arm64: dts: broadcom: bcm2712: add raspberrypi,bcm2712-firmware compatible Gregor Herburger
@ 2026-05-20 14:27 ` Gregor Herburger
2026-05-21 7:11 ` Krzysztof Kozlowski
2026-05-20 14:28 ` [PATCH v5 8/8] arm64: defconfig: Enable the raspberrypi otp driver as module Gregor Herburger
7 siblings, 1 reply; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:27 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Conor Dooley, Gregor Herburger
The select schema is not necessary because the
raspberrypi,bcm2835-firmware compatible is already matched by the
compatible string values. The documentation says "Most bindings should
not need select", so remove it.
Acked-by: Conor Dooley <conor.dooley@microchip•com>
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
.../bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
index a3a5243b91706..7cf9a6fa1e5be 100644
--- a/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
+++ b/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
@@ -10,15 +10,6 @@ maintainers:
- Eric Anholt <eric@anholt•net>
- Stefan Wahren <wahrenst@gmx•net>
-select:
- properties:
- compatible:
- contains:
- const: raspberrypi,bcm2835-firmware
-
- required:
- - compatible
-
properties:
compatible:
oneOf:
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* [PATCH v5 8/8] arm64: defconfig: Enable the raspberrypi otp driver as module
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
` (6 preceding siblings ...)
2026-05-20 14:27 ` [PATCH v5 7/8] dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select Gregor Herburger
@ 2026-05-20 14:28 ` Gregor Herburger
2026-05-21 7:09 ` Krzysztof Kozlowski
7 siblings, 1 reply; 15+ messages in thread
From: Gregor Herburger @ 2026-05-20 14:28 UTC (permalink / raw)
To: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Gregor Herburger
Enable the newly add Raspberry Pi OTP driver as module to allow access
to the otp registers.
Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
---
arch/arm64/configs/defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index e44e83bc57812..3abb3ca34c708 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1849,6 +1849,7 @@ CONFIG_NVMEM_SPMI_SDAM=m
CONFIG_NVMEM_SUNXI_SID=y
CONFIG_NVMEM_UNIPHIER_EFUSE=y
CONFIG_NVMEM_ZYNQMP=m
+CONFIG_NVMEM_RASPBERRYPI_OTP=m
CONFIG_FPGA=y
CONFIG_FPGA_MGR_ALTERA_CVP=m
CONFIG_FPGA_MGR_STRATIX10_SOC=m
--
2.47.3
^ permalink raw reply related [flat|nested] 15+ messages in thread
* Re: [PATCH v5 8/8] arm64: defconfig: Enable the raspberrypi otp driver as module
2026-05-20 14:28 ` [PATCH v5 8/8] arm64: defconfig: Enable the raspberrypi otp driver as module Gregor Herburger
@ 2026-05-21 7:09 ` Krzysztof Kozlowski
0 siblings, 0 replies; 15+ messages in thread
From: Krzysztof Kozlowski @ 2026-05-21 7:09 UTC (permalink / raw)
To: Gregor Herburger, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Florian Fainelli, Ray Jui, Scott Branden,
Broadcom internal kernel review list, Eric Anholt, Stefan Wahren,
Srinivas Kandagatla, Kees Cook, Gustavo A. R. Silva,
Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening
On 20/05/2026 16:28, Gregor Herburger wrote:
> Enable the newly add Raspberry Pi OTP driver as module to allow access
> to the otp registers.
... on foo bar board?
Otherwise, why do we want it in upstream?
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v5 7/8] dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select
2026-05-20 14:27 ` [PATCH v5 7/8] dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select Gregor Herburger
@ 2026-05-21 7:11 ` Krzysztof Kozlowski
0 siblings, 0 replies; 15+ messages in thread
From: Krzysztof Kozlowski @ 2026-05-21 7:11 UTC (permalink / raw)
To: Gregor Herburger, Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Florian Fainelli, Ray Jui, Scott Branden,
Broadcom internal kernel review list, Eric Anholt, Stefan Wahren,
Srinivas Kandagatla, Kees Cook, Gustavo A. R. Silva,
Thomas Weißschuh
Cc: devicetree, linux-rpi-kernel, linux-arm-kernel, linux-kernel,
linux-hardening, Conor Dooley
On 20/05/2026 16:27, Gregor Herburger wrote:
> The select schema is not necessary because the
> raspberrypi,bcm2835-firmware compatible is already matched by the
> compatible string values.
This is wrong. The select was not because of that. Select was needed
because of simple-mfd, but dtschema was changed, so please rephrase:
The "select" in schema is not necessary anymore since dtschema drops
simple-mfd when constructing the select/filter query for schemas with
compatibles.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration
2026-05-20 14:27 ` [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration Gregor Herburger
@ 2026-05-21 14:32 ` Thomas Weißschuh
0 siblings, 0 replies; 15+ messages in thread
From: Thomas Weißschuh @ 2026-05-21 14:32 UTC (permalink / raw)
To: Gregor Herburger
Cc: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, devicetree, linux-rpi-kernel,
linux-arm-kernel, linux-kernel, linux-hardening
On Wed, May 20, 2026 at 04:27:53PM +0200, Gregor Herburger wrote:
> The drivers that depend on the RASPBERRYPI_FIRMWARE use
>
> depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
>
> This should ensure that the driver is not compiled in when
> RASPBERRYPI_FIRMWARE is 'm' on COMPILE_TEST which leads to linker
> errors.
>
> The same can be achieved by using IS_REACHABLE in the
> raspberrypi-firmware header. This evaluates to false when invoked from
> built-in code. This way the Kconfig can be written as
>
> depends on RASPBERRYPI_FIRMWARE || COMPILE_TEST
>
> Which is a more readable variant.
>
> Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix•de>
(...)
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v5 2/8] nvmem: core: Enforce stride and alignment checks for nvmem_device functions
2026-05-20 14:27 ` [PATCH v5 2/8] nvmem: core: Enforce stride and alignment checks for nvmem_device functions Gregor Herburger
@ 2026-05-21 14:32 ` Thomas Weißschuh
0 siblings, 0 replies; 15+ messages in thread
From: Thomas Weißschuh @ 2026-05-21 14:32 UTC (permalink / raw)
To: Gregor Herburger
Cc: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, devicetree, linux-rpi-kernel,
linux-arm-kernel, linux-kernel, linux-hardening
On Wed, May 20, 2026 at 04:27:54PM +0200, Gregor Herburger wrote:
> The stride and word_size attributes in the nvmem_config struct are
> currently only used when reading/writing through sysfs functions
> bin_attr_nvmem_read/bin_attr_nvmem_write and in the nvmem_cell api.
> Reads and writes with nvmem_device_write/nvmem_device_read still allow
> unaligned access.
>
> Add a check to these functions to enforce word_size and stride_length
> aligned reads and writes.
>
> Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix•de>
> ---
> drivers/nvmem/core.c | 12 ++++++++++++
> 1 file changed, 12 insertions(+)
(...)
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v5 4/8] nvmem: Add the Raspberry Pi OTP driver
2026-05-20 14:27 ` [PATCH v5 4/8] nvmem: Add the Raspberry Pi OTP driver Gregor Herburger
@ 2026-05-21 14:34 ` Thomas Weißschuh
0 siblings, 0 replies; 15+ messages in thread
From: Thomas Weißschuh @ 2026-05-21 14:34 UTC (permalink / raw)
To: Gregor Herburger
Cc: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, devicetree, linux-rpi-kernel,
linux-arm-kernel, linux-kernel, linux-hardening
On Wed, May 20, 2026 at 04:27:56PM +0200, Gregor Herburger wrote:
> Raspberry Pis have OTP registers which can be accessed through the
> videocore firmware. Add a nvmem driver to support these OTP registers.
>
> Reviewed-by: Stefan Wahren <wahrenst@gmx•net>
> Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix•de>
> ---
> drivers/nvmem/Kconfig | 11 +++
> drivers/nvmem/Makefile | 1 +
> drivers/nvmem/raspberrypi-otp.c | 130 +++++++++++++++++++++++++++++
> include/soc/bcm2835/raspberrypi-firmware.h | 10 +++
> 4 files changed, 152 insertions(+)
(...)
> +static const struct platform_device_id raspberrypi_otp_id[] = {
> + { "raspberrypi-otp" },
> + {},
The last sentinel element should not have a trailing comma,
to make sure nobody places an element after it by accident.
> +};
> +MODULE_DEVICE_TABLE(platform, raspberrypi_otp_id);
(...)
^ permalink raw reply [flat|nested] 15+ messages in thread
* Re: [PATCH v5 5/8] firmware: raspberrypi: register nvmem driver
2026-05-20 14:27 ` [PATCH v5 5/8] firmware: raspberrypi: register nvmem driver Gregor Herburger
@ 2026-05-21 14:38 ` Thomas Weißschuh
0 siblings, 0 replies; 15+ messages in thread
From: Thomas Weißschuh @ 2026-05-21 14:38 UTC (permalink / raw)
To: Gregor Herburger
Cc: Rob Herring, Krzysztof Kozlowski, Conor Dooley, Florian Fainelli,
Ray Jui, Scott Branden, Broadcom internal kernel review list,
Eric Anholt, Stefan Wahren, Srinivas Kandagatla, Kees Cook,
Gustavo A. R. Silva, devicetree, linux-rpi-kernel,
linux-arm-kernel, linux-kernel, linux-hardening
On Wed, May 20, 2026 at 04:27:57PM +0200, Gregor Herburger wrote:
> The Raspberry Pi firmware exposes two regions with otp registers. The
> first region called "customer otp" is available on all Raspberry Pi
> models. The second is only available on the Raspberry Pi 5 (bcm2712).
>
> Signed-off-by: Gregor Herburger <gregor.herburger@linutronix•de>
Reviewed-by: Thomas Weißschuh <thomas.weissschuh@linutronix•de>
> ---
> drivers/firmware/raspberrypi.c | 59 +++++++++++++++++++++++++++++-
> include/soc/bcm2835/raspberrypi-firmware.h | 5 +++
> 2 files changed, 63 insertions(+), 1 deletion(-)
(...)
> +static void rpi_register_otp_driver(struct device *dev)
> +{
> + struct rpi_firmware *fw = dev_get_drvdata(dev);
> +
> + rpi_otp_customer = platform_device_register_data(dev, "raspberrypi-otp",
> + PLATFORM_DEVID_AUTO,
> + &rpi_otp_customer_data,
> + sizeof(rpi_otp_customer_data));
> +
> + if (IS_ERR(rpi_otp_customer))
> + dev_err(dev, "Failed to register customer OTP device: %ld\n",
> + PTR_ERR(rpi_otp_customer));
These should use %pe which will nicely format the error.
This also differs from the other subdevice registrations which do not
print a message on error.
> +
> + if (fw->soc == RPI_FIRMWARE_SOC_BCM2712) {
> + rpi_otp_private = platform_device_register_data(dev, "raspberrypi-otp",
> + PLATFORM_DEVID_AUTO,
> + &rpi_otp_private_data,
> + sizeof(rpi_otp_private_data));
> +
> + if (IS_ERR(rpi_otp_private))
> + dev_err(dev, "Failed to register private OTP device: %ld\n",
> + PTR_ERR(rpi_otp_private));
> + }
> +}
(...)
^ permalink raw reply [flat|nested] 15+ messages in thread
end of thread, other threads:[~2026-05-21 14:38 UTC | newest]
Thread overview: 15+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-20 14:27 [PATCH v5 0/8] nvmem: Add Raspberry Pi OTP nvmem driver Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 1/8] soc: bcm2835: Use IS_REACHABLE for function declaration Gregor Herburger
2026-05-21 14:32 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 2/8] nvmem: core: Enforce stride and alignment checks for nvmem_device functions Gregor Herburger
2026-05-21 14:32 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 3/8] dt-bindings: raspberrypi,bcm2835-firmware: Add bcm2712-firmware compatible Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 4/8] nvmem: Add the Raspberry Pi OTP driver Gregor Herburger
2026-05-21 14:34 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 5/8] firmware: raspberrypi: register nvmem driver Gregor Herburger
2026-05-21 14:38 ` Thomas Weißschuh
2026-05-20 14:27 ` [PATCH v5 6/8] arm64: dts: broadcom: bcm2712: add raspberrypi,bcm2712-firmware compatible Gregor Herburger
2026-05-20 14:27 ` [PATCH v5 7/8] dt-bindings: raspberrypi,bcm2835-firmware: Drop unnecessary select Gregor Herburger
2026-05-21 7:11 ` Krzysztof Kozlowski
2026-05-20 14:28 ` [PATCH v5 8/8] arm64: defconfig: Enable the raspberrypi otp driver as module Gregor Herburger
2026-05-21 7:09 ` Krzysztof Kozlowski
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