linux-xiaomi-chiron/include/linux/mfd/ds1wm.h
Johannes Poehlmann 242b476f82 w1: ds1wm: fix register offset (bus shift) calculation
Replace incorrect register offsett calculation by
direct configuration of bus_shift in mfd-cell.

Indirect definition of address-shift by resource size
was unobvious and was wrong (should have used a binary log).

Signed-off-by: Johannes Poehlmann <johannes.poehlmann@izt-labs.de>
Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-08-28 17:20:01 +02:00

23 lines
671 B
C

/* MFD cell driver data for the DS1WM driver
*
* to be defined in the MFD device that is
* using this driver for one of his sub devices
*/
struct ds1wm_driver_data {
int active_high;
int clock_rate;
/* in milliseconds, the amount of time to
* sleep following a reset pulse. Zero
* should work if your bus devices recover
* time respects the 1-wire spec since the
* ds1wm implements the precise timings of
* a reset pulse/presence detect sequence.
*/
unsigned int reset_recover_delay;
/* left shift of register number to get register address offsett.
* Only 0,1,2 allowed for 8,16 or 32 bit bus width respectively
*/
unsigned int bus_shift;
};