linux-stable/drivers/i3c/master
Jack Chen 510d2358c4 i3c: master: dw: stop hardcoding initial speed
Bus-speed could be default(12.5MHz) or defined by users in dts.
Dw-i3c-master should not hard-code the initial speed to be
I3C_BUS_TYP_I3C_SCL_RATE (12.5MHz)
And because of Synopsys's I3C controller limit (hcnt/lcnt register
length) and core-clk provided, there is a limit to bus speed, too.
For example, when core-clk is 250 MHz, the bus speed cannot be
lowered below 1MHz.

Tested: tested with an i3c sensor and captured with a logic analyzer.

Signed-off-by: Jack Chen <zenghuchen@google.com>
Link: https://lore.kernel.org/r/20230216151057.293764-1-zenghuchen@google.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
2023-02-28 23:54:49 +01:00
..
mipi-i3c-hci
dw-i3c-master.c i3c: master: dw: stop hardcoding initial speed 2023-02-28 23:54:49 +01:00
i3c-master-cdns.c
Kconfig
Makefile
svc-i3c-master.c