Skip to content

drivers: hwinfo: Memoize the USN fetched on MAX32 #97093

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Oct 9, 2025
+26 −7
Merged

drivers: hwinfo: Memoize the USN fetched on MAX32 #97093

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
9ee7003
drivers: hwinfo: Memoize the USN fetched on MAX32
petejohanson-adi Jul 2, 2025
82c21d4
boards: adi: Enable hwinfo support for missed MAX32 boards
petejohanson-adi Jul 2, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions boards/adi/max32655evkit/max32655evkit_max32655_m4.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ toolchain:
supported:
- gpio
- serial
- hwinfo
- trng
- i2c
- dma
Expand Down
1 change: 1 addition & 0 deletions boards/adi/max32657evkit/max32657evkit_max32657.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ supported:
- gpio
- trng
- watchdog
- hwinfo
- dma
- counter
- pwm
Expand Down
1 change: 1 addition & 0 deletions boards/adi/max32690evkit/max32690evkit_max32690_m4.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ toolchain:
supported:
- gpio
- serial
- hwinfo
- spi
- i2c
- trng
Expand Down
1 change: 1 addition & 0 deletions boards/adi/max78002evkit/max78002evkit_max78002_m4.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,7 @@ toolchain:
supported:
- gpio
- serial
- hwinfo
- trng
- i2c
- dma
Expand Down
29 changes: 22 additions & 7 deletions drivers/hwinfo/hwinfo_max32.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,21 +4,33 @@
* SPDX-License-Identifier: Apache-2.0
*/

#include <zephyr/kernel.h>
#include <zephyr/drivers/hwinfo.h>
#include <soc.h>
#include <wrap_max32_sys.h>
#include <string.h>
#include <zephyr/sys/byteorder.h>

static struct k_spinlock device_id_lock;
static bool initialized;
static uint8_t usn[MXC_SYS_USN_LEN];

ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)
{
uint8_t usn[MXC_SYS_USN_LEN];
int error;
int ret;
k_spinlock_key_t key;

key = k_spin_lock(&device_id_lock);

if (!initialized) {
ret = Wrap_MXC_SYS_GetUSN(usn);

if (ret != E_NO_ERROR) {
/* Error reading USN */
goto exit;
}

error = Wrap_MXC_SYS_GetUSN(usn);
if (error != E_NO_ERROR) {
/* Error reading USN */
return error;
initialized = true;
}

if (length > sizeof(usn)) {
Expand All @@ -27,6 +39,9 @@ ssize_t z_impl_hwinfo_get_device_id(uint8_t *buffer, size_t length)

/* Provide device ID in big endian */
sys_memcpy_swap(buffer, usn, length);
ret = length;

return length;
exit:
k_spin_unlock(&device_id_lock, key);
return ret;
}