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| author | Tobias Waldekranz <tobias@waldekranz.com> | 2021-02-02 22:16:45 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2021-02-05 06:09:47 +0300 |
| commit | add285bce37720675af5b1873f71af8561d0e2fe (patch) | |
| tree | 310c81935e04b68c396c93aa4a76f6abf31b9e54 /tools/perf/scripts/python/stackcollapse.py | |
| parent | b53014f0791cbc4925f52d7c46220845e42d0a91 (diff) | |
| download | linux-add285bce37720675af5b1873f71af8561d0e2fe.tar.xz | |
net: dsa: xrs700x: Correctly address device over I2C
On read, master should send 31 MSB of the register (only even values
are ever used), followed by a 1 to indicate read. Then, reading two
bytes, the device will output the register's value.
On write, master sends 31 MSB of the register, followed by a 0 to
indicate write, followed by two bytes containing the register value.
Flexibilis' documentation (version 1.3) specifies the opposite
polarity (#read/write), but the scope indicates that it is, in fact,
read/#write.
Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: George McCollister <george.mccollister@gmail.com>
Link: https://lore.kernel.org/r/20210202191645.439-1-tobias@waldekranz.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions