FreeBSD source tree https://cgit-dev.freebsd.org/src/atom?h=releng%2F12.2 2019-12-22T18:51:05Z 2019-12-22T18:51:05Z Ian Lepore ian@FreeBSD.org 2019-12-22T18:51:05Z urn:sha1:58784a4befd4b4860a14d230e8daebb9554f2d99 r355467: Implement bus_rescan for gpiobus(4). This allows on-the-fly reconfiguration of gpio devices by using kenv to add hints for a new device and then do 'devctl rescan gpiobus4' to make the new device(s) attach. It's not particularly easy to detect whether the 'at' hint has been deleted for a child device that's currently attached, so this doesn't handle that. But the user can use devctl commands to manually detach an existing device. r355499: Add module build stuff for gpioths(4), a driver for DHT11/DHT22 sensors. r355531: Several small fixes for the gpioths (temp/humidity sensor) driver. At the end of a read cycle, set the gpio pin to INPUT rather than OUTPUT. The state of the single-wire "bus" when idle should be high; setting the pin to input allows the external pullup to pull the line high. Setting it to output (and leaving it driving low) was leading a good read cycle followed by one that would fail, and it just continued like that forever, effectively reading the sensor once every 10 seconds instead of 5. In the attach function, do an initial read from the device before registering the sysctls for accessing the last-read values, to prevent reading spurious values for the first 5 seconds after the driver attaches. Do a callout_drain() in the detach function to prevent crashes after unloading the module. r355532: Simplify sysctl stuff in the gpioths driver. There is no need to use local functions to handle the sysctls, they all just access simple readonly integer variables. There's no need to track the oids of the ones we add, since the teardown is done by newbus code, not the driver itself. Also remove the DDB code, because it just provides access to the same data that the sysctls already provide. r355533: Add support for more chips to the gpioths driver. Previously the driver supported the DHT11 sensor. Now it supports DHT11, DHT12, DHT21, DHT22, AM3201, AM3202. All these chips are similar, differing primarily in supported temperature and humidity ranges and accuracy (and, presumably, cost). There are two basic data formats reported by the various chips, and it is possible to figure out at runtime which format to use for decoding the data based on the range of values in a single byte of the humidity measurement. (which is detailed in a comment block, so I won't recapitulate it here). r355535: Add a MODULE_DEPEND() for the gpioths driver. Also, note that the prior commit changed the sysctl format for the temperature from "I" to "IK", and correspondingly changed the units from integer degrees C to decikelvin. For access via sysctl(8) the output will be the same except that now decimal fractions will be shown when available. r355540: Add FDT support to the gpioths driver. It now uses the newer gpio_pin_*() API and can attach based on either hints or fdt data. r355548: Add a man page for the gpioths(4) driver. r355549: Add myself to the copyright list. Also add an SPDX tag. And finally, fix a missing word and a spelling error in a comment. r355550: Paste things correctly so that I'm added to the *end* of the copyright list. r355551: Connect the gpioths(4) manpage to the build. r355565: Switch gpioths(4) from using a callout to a taskqueue for periodic polling of the sensor hardware. Part of the polling process involves signalling the chip then waiting 20 milliseconds. This was being done with DELAY(), which is a pretty rude thing to do in a callout. Now a taskqueue_thread task is scheduled to do the polling, and because sleeping is allowed in the task context, pause_sbt() replaces DELAY() for the 20ms wait. 2018-01-07T20:28:17Z Justin Hibbits jhibbits@FreeBSD.org 2018-01-07T20:28:17Z urn:sha1:f1a48eaf0dc620729bca82c109c36fcbfe9c0482 ofw_gpiobus.c is needed when FDT is used. MFC after: 2 weeks 2017-03-04T10:10:17Z Enji Cooper ngie@FreeBSD.org 2017-03-04T10:10:17Z urn:sha1:193d9e768ba63fcfb187cfd17f461f7d41345048 This simplifies make output/logic Tested with: `cd sys/modules; make ALL_MODULES=` on amd64 MFC after: 1 month Sponsored by: Dell EMC Isilon 2016-11-07T21:15:39Z Oleksandr Tymoshenko gonzo@FreeBSD.org 2016-11-07T21:15:39Z urn:sha1:aabc5ce043340c18d7bc7f7ca956724c66583625 - Split driver in two parts: FDT and non-FDT - Instead of reattach gpioled nodes to GPIO bus use gpio_pin_get_by_ofw_idx and add ofwbus and simplebus as parrent buses Reviewed by: loos Differential Revision: https://reviews.freebsd.org/D8233 2016-10-21T03:23:17Z Li-Wen Hsu lwhsu@FreeBSD.org 2016-10-21T03:23:17Z urn:sha1:90ea06dd8af1b96288d9526d6c1dad57cead33c9 Reviewed by: imp, loos Differential Revision: https://reviews.freebsd.org/D7815 2016-05-28T00:22:39Z Oleksandr Tymoshenko gonzo@FreeBSD.org 2016-05-28T00:22:39Z urn:sha1:12889df73f046d2525b75797c23e8fc2809dc6d1 2016-05-27T17:40:29Z Ian Lepore ian@FreeBSD.org 2016-05-27T17:40:29Z urn:sha1:99819ca00cb3f5377353364a78bff362b0c562a3 includes the FDT option. Use OPT_FDT to conditionally compile modules that require FDT support. In the past we've gotten away with using the arch name as a proxy for FDT support in makefile conditional logic, but now mips has some platforms with fdt support and some without and we need a more direct test. 2016-05-27T04:34:42Z Ian Lepore ian@FreeBSD.org 2016-05-27T04:34:42Z urn:sha1:606efbc7337d2068c2436e05284113fb7a8330f7 Submitted by: manu Pointy hat: ian 2016-05-27T01:42:55Z Adrian Chadd adrian@FreeBSD.org 2016-05-27T01:42:55Z urn:sha1:b4c5dea65c9cb6e9f66f2fbe65f9043758b4e75a 2016-05-26T23:56:12Z Ian Lepore ian@FreeBSD.org 2016-05-26T23:56:12Z urn:sha1:128e3872b90b0da81dc8340f720c87d18955895e supports only ofw/fdt systems. Some day, hinted attachment for non-fdt systems should be possible too.