Hello, This series adds setup nessesary to transmit lora packets from the SX1301x, it builds on the comments on the RFC [1] to a point where the card is capable of sending out a LoRa modulated signal using transmission paramaters from the LORA socket address.
As patches have been refactored and split up extensivly to bite sized chunks they do not include individual RFC -> v1, this is covered in this letter. The setup involves starting the firmware up inside the card by providing a LUT of its internal gain values calibrated against the card output. As this information is hardware specific it is added as a binding in the DT, with documentation to match. Binding patch is based off a commit of the basic documentation under review [2] Not captured here are commands to set this gain table for use in devices which do not use DT. As _stat_xmit cannot sleep we spin the tx function to a work queue so we can write to the SPI backed regmaps. As proposed [3] as one way of getting lora packet metadata to the driver is by using the socket address to encode spreading factor, coding rate, bandwidth etc. The corresponding translation is added on the driver side, populating the test transmission with real values and has been tested to show changing bandwidths. To perform testing a tx_test [4] was used to show changing parameters on a spectrum analyser. We also add patches to the defaults in the SX130x to fill in a TODO in our initialisation. Thanks, Ben Whitten [1] http://lists.infradead.org/pipermail/linux-lpwan/2018-December/000019.html [2] http://lists.infradead.org/pipermail/linux-lpwan/2019-January/000150.html [3] https://events.linuxfoundation.org/wp-content/uploads/2017/12/ELCE2018_LoRa_final_Andreas-Farber.pdf slide 16 [4] https://github.com/BWhitten/lora-modules/blob/master/tx_test.c RFC -> v1 * Split up commits to sensible order and logical block sizes. * Added DT binding for TX gain LUT. * Fixed spelling mistakes. * Converted metadata enums to suggested integers with suitable sizes. * Fixed out by 1 in test transmission population. CC: linux-lp...@lists.infradead.org CC: netdev@vger.kernel.org CC: linux-ker...@vger.kernel.org Ben Whitten (11): dt-bindings: net: lora: sx130x: add power lut binding net: lora: sx130x: add loading of tx lut from DT net: lora: sx130x: add CHRS to volatile register list net: lora: sx130x: add helper function for writing to the SX130x MCU net: lora: sx130x: initialise AGC net: lora: sx130x: add detail to TODO in setup net: lora: sx130x: add work queue to tx path net: lora: sx130x: add test transmission net: lora: introduce lora socket addressing for metadata net: lora: sx130x: make use of lora address metadata in transmission net: lora: sx130x: add patch to register fields .../bindings/net/lora/semtech,sx130x.yaml | 13 + drivers/net/lora/sx130x.c | 521 +++++++++++++++++- drivers/net/lora/sx130x.h | 97 ++++ include/linux/lora/skb.h | 9 + include/uapi/linux/lora.h | 14 + net/lora/dgram.c | 45 ++ 6 files changed, 697 insertions(+), 2 deletions(-) -- 2.17.1
