Add a small QR code generator library so U-Boot boards can encode
arbitrary text or binary into a QR symbol. Main use cases include
displaying URLs, pairing tokens, serial numbers or
self-diagnostic state from the bootloader (e.g. during porting to a
new mobile device with no serial console or usb peripheral working).
Optionally apply gzip compression for the QR code payload.
Three patches:
1. Verbatim import of Nayuki's public-domain / MIT-licensed C QR Code
generator (qrcodegen.{h,c}) under CONFIG_LIB_QRCODE. No code
changes and the only adjustments are SPDX header, swapping <assert.h>
for U-Boot's <log.h>.
2. CONFIG_LIB_QRCODE_MAX_VERSION (int, 1..40, default 40) so callers
can cap the maximum QR version. The version trades payload capacity for
smaller static scratch buffers.
3. CONFIG_LIB_QRCODE_GZIP (bool, depends on GZIP_COMPRESSED) and a
helper qrcodegen_encodeBinaryCompressed(). Perpends four-byte "QRGZ"
magic header so the scanner side can detect and decompress.
Signed-off-by: Petr Hodina <[email protected]>
---
Petr Hodina (3):
lib: qrcodegen: Import Nayuki QR Code generator library
lib: qrcodegen: configurable maximum QR code version
lib: qrcodegen: optional gzip pre-compression of payloads
include/qrcodegen.h | 407 ++++++++++++++++++++
lib/Kconfig | 44 +++
lib/Makefile | 2 +
lib/qrcodegen.c | 1034 ++++++++++++++++++++++++++++++++++++++++++++++++++
lib/qrcodegen_gzip.c | 45 +++
5 files changed, 1532 insertions(+)
---
base-commit: ece349ade2973e220f524ce59e59711cc919263f
change-id: 20260611-b4-lib-qrcode-a5ce89e68f85
Best regards,
--
Petr Hodina <[email protected]>
