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This commit enables the active pullup (APU bit) by default for the DS2482 1-Wire master. >From the DS2482 datasheet: "The APU bit controls whether an active pullup (controlled slew-rate transistor) or a passive pullup (Rwpu resistor) will be used to drive a 1-Wire line from low to high. When APU = 0, active pullup is disabled (resistor mode). Active Pullup should always be selected unless there is only a single slave on the 1-Wire line." According to the module author, Ben Gardner: "It doesn't look like active pullup would cause any hurt if there is only a single slave." And my tests with multiple and single slaves on 1-Wire bus confirms that. This active pullup can be manually disabled using the introduced module parameter: active_pullup = 0 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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| .. | ||
| masters | ||
| slaves | ||
| Kconfig | ||
| Makefile | ||
| w1_family.c | ||
| w1_family.h | ||
| w1_int.c | ||
| w1_int.h | ||
| w1_io.c | ||
| w1_log.h | ||
| w1_netlink.c | ||
| w1_netlink.h | ||
| w1.c | ||
| w1.h | ||