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drivers: hwinfo: update i.MX implementation byte order

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Resources indicate that CFG2 holds the upper 32 bits, and CFG1 the
lower 32 bits, of a 64-bit unique identifier.  Store it in big-endian
format so it reads correctly when accessed as a byte sequence.

https://community.nxp.com/docs/DOC-94459

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
This commit is contained in:
Peter Bigot 2020-04-10 11:50:50 -05:00 • committed by Carles Cufí
commit 1668c21e17
1 changed files with 3 additions and 2 deletions
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5
drivers/hwinfo/hwinfo_imxrt.c
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@ -7,6 +7,7 @@
#include <soc.h>
#include <drivers/hwinfo.h>
#include <string.h>
#include <sys/byteorder.h>
struct imxrt_uid {
u32_t id[2];
@ -16,8 +17,8 @@ ssize_t z_impl_hwinfo_get_device_id(u8_t *buffer, size_t length)
{
struct imxrt_uid dev_id;
dev_id.id[0] = OCOTP->CFG1;
dev_id.id[1] = OCOTP->CFG2;
dev_id.id[0] = sys_cpu_to_be32(OCOTP->CFG2);
dev_id.id[1] = sys_cpu_to_be32(OCOTP->CFG1);
if (length > sizeof(dev_id.id)) {
length = sizeof(dev_id.id);