On Thu, 2 Jun 2005 13:09:52 -0400 <BGardner at Wabtec.com> wrote: > While writing a driver for the DS2482 (an i2c to w1 bridge), > I made a few enhancements to the w1 subsystem. > > 1. > I added a new I/O function: triplet > A triplet reads two bits and writes a direction bit. The DS2482 > implements this in hardware. > I modified w1_search() to use w1_triplet() at its core. > > 2. > I cleaned up the I/O functions to separate emulated vs native w1 > support. > A w1 bus master must be able to do one of: > a. Set and sample the line via write_bit() and read_bit() > b. Support reset_bus() and touch_bit() > Function set (a) is only needed for emulated devices (ie, a parallel > port). > I hid w1_read_bit() and w1_write_bit() behind w1_touch_bit(), and > changed functions to call touch_bit() instead or read/write_bit(). > > 3. > Searching is fairly slow - it requires about 200 w1 bit cycles per > device, multiplied by the number of devices on the bus. > I modified the w1_process() to NOT periodically search the bus. > A sysfs entry was added to request a search. (w1_master_search). > To request a search, echo anything into w1_master_search and it'll run > another search. > > 4. > I added a default family so that a slave device will get reported even > if there isn't a driver for that family. > > Signed-off-by: Ben Gardner <bgardner at wabtec.com> I've tested your patches and all looks ok. But patches 3 and 4 were applied with several hunks. Greg, did you applied my previous 4 cleanups for w1? Current patches are made against pure rc5-mm2 patches and thus can fuzz and even fail with your tree with previous w1 cleanups. Can your try to apply this 5 patches [inlined in the next e-mails] and one I will send in a next e-mail with reconnect feature and confirm that it can not be applied or not. Thanks. Evgeniy Polyakov Only failure makes us experts. -- Theo de Raadt
