can: mcp251x: Improve mcp251x_hw_reset()

Browse source

The MCP251x utilizes an oscillator startup timer (OST), which holds the
chip in reset, to insure that the oscillator has stabilized before the
internal state machine begins to operate. The OST maintains reset for
the first 128 OSC clock cycles after power up or reset.
So, this patch removes unnecessary loops and reduce delay for power on
and reset to the safe value.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Tested-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

...

This commit is contained in:

Alexander Shiyan 2014-03-28 14:14:45 +04:00 • committed by Marc Kleine-Budde

parent 31473c286c

commit ff06d611a3

1 changed files with 16 additions and 19 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

35

drivers/net/can/mcp251x.c

View file