diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2024-01-31 17:09:30 +0100 |
|---|---|---|
| committer | Andi Shyti <andi.shyti@kernel.org> | 2024-02-08 09:34:17 +0100 |
| commit | 7a7fd335f821f93f9327f581e1677361c48a0dea (patch) | |
| tree | 18f0513916a2b6041863a4a57565d315a3632bf2 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | c0fcc4d9fc0784f8c11af0343092f8d945339431 (diff) | |
i2c: sh_mobile: Switch R-Mobile A1/APE6 and SH-Mobile AG5 to new frequency calculation
Switch the R-Mobile A1, R-Mobile APE6, and SH-Mobile AG5 SoCs to the new
frequency calculation formula, to (a) avoid running the I2C bus too fast,
and (b) bring the low/high ratio closer to the recommended ratio 5/4.
As this makes fast_clock_dt_config and v2_freq_calc_dt_config identical,
merge them into a single fast_clock_dt_config.
Legacy SH users (sh7343, sh7366, and sh772[234]) are left alone, and
still use the old formula.
Measurement results on R-Mobile APE6 and SH-Mobile AG5 (fck=104 MHz,
clks_per_count=2):
100 kHz: 106 kHz LH=1.12 before, 99.6 kHz L/H=1.22 after
400 kHz: 384 kHz LH=1.67 before, 392 kHz L/H=1.27 after
Measurement results on R-Mobile A1 (fck=49.5 MHz, clks_per_count=1):
100 kHz: 106 kHz L/H=1.09 before, 99.6 kHz L/H=1.20 after
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions