src-test/sys/dev/pwm/pwmc.c, branch main FreeBSD source tree https://cgit-dev.freebsd.org/src-test/atom?h=main 2020-09-01T21:57:50Z pwm: clean up empty lines in .c and .h files 2020-09-01T21:57:50Z Mateusz Guzik mjg@FreeBSD.org 2020-09-01T21:57:50Z urn:sha1:d1779f95e20a57e70c6c9f0908513b72b8e18610 Remove "all rights reserved" from copyright for the file I own. 2019-12-03T21:00:45Z Emmanuel Vadot manu@FreeBSD.org 2019-12-03T21:00:45Z urn:sha1:e213223c9b89a79738823f719b3d6285049f8393 Some of the files have both me and Jared McNeill and he gave me permission to remove it from his files too. Handle labels specified with hints even on FDT systems. Hints are the 2019-06-18T17:05:05Z Ian Lepore ian@FreeBSD.org 2019-06-18T17:05:05Z urn:sha1:edd96b9fb91f11c232fe76e2b3e7875a6f6776ab easiest thing for a user to control (via loader.conf or kenv+kldload), so handle them in addition to any label specified via the FDT data. Remove everything related to channels from the pwmc public interface, now 2019-06-18T00:11:00Z Ian Lepore ian@FreeBSD.org 2019-06-18T00:11:00Z urn:sha1:780c3de886522ebc73f3fcdfc65b224f737a7180 that there is a pwmc(4) instance per channel and the channel number is maintained as a driver ivar rather than being passed in from userland. Put the pwmc cdev filenames under the pwm directory along with any label 2019-06-17T16:26:43Z Ian Lepore ian@FreeBSD.org 2019-06-17T16:26:43Z urn:sha1:b5d67730ee032cd97d39394282c79b3bf481a0e2 names. I.e., everything related to pwm now goes in /dev/pwm. This will make it easier for userland tools to turn an unqualified name into a fully qualified pathname, whether it's the base pwmcX.Y name or a label name. Add back a const qualifier I somehow fumbled away between test-building 2019-06-17T03:48:44Z Ian Lepore ian@FreeBSD.org 2019-06-17T03:48:44Z urn:sha1:2c6c030ce24ab838889c0fa4656f347a4c12e366 and committing recent changes. Add ofw_pwmbus to enumerate pwmbus devices on systems configured with fdt 2019-06-17T03:32:05Z Ian Lepore ian@FreeBSD.org 2019-06-17T03:32:05Z urn:sha1:b43e2c8b56b9f494a962c82572e0306ac06ad8d7 data. Also, add fdt support to pwmc. Rework pwmbus and pwmc so that each child will handle a single PWM channel. 2019-06-16T19:44:42Z Ian Lepore ian@FreeBSD.org 2019-06-16T19:44:42Z urn:sha1:0af7a9a45179bc98c1f62c21c5272d7cae74e9ed Previously, there was a pwmc instance for each instance of pwm hardware regardless of how many pwm channels that hardware supported. Now there will be a pwmc instance for each channel when the hardware supports multiple channels. With a separate instance for each channel, we can have "named channels" in userland by making devfs alias entries in /dev/pwm. These changes add support for ivars to pwmbus, and use an ivar to track the channel number for each child. It also adds support for hinted children. In pwmc, the driver checks for a label hint, and if present, it's used to create an alias for the cdev in /dev/pwm. It's not anticipated that hints will be heavily used, but it's easy to do and allows quick ad-hoc creation of named channels from userland by using kenv to create hint.pwmc.N.label= hints. Upcoming changes will add FDT support, and most labels will probably be specified that way. Make pwm channel numbers unsigned. 2019-06-15T23:02:09Z Ian Lepore ian@FreeBSD.org 2019-06-15T23:02:09Z urn:sha1:6cdbe2bf20c987baec4023565b12b24ab07cef72 Restructure the pwm device hirearchy and interfaces. 2019-06-15T22:25:39Z Ian Lepore ian@FreeBSD.org 2019-06-15T22:25:39Z urn:sha1:f8f8d87cd902d79d09e315cac56f996cdeffa9fc The pwm and pwmbus interfaces were nearly identical, this merges them into a single pwmbus interface. The pwmbus driver now implements the pwmbus interface by simply passing all calls through to its parent (the hardware driver). The channel_count method moves from pwm to pwmbus, and the get_bus method is deleted (just no longer needed). The net effect is that the interface for doing pwm stuff is now the same regardless of whether you're a child of pwmbus, or some random driver elsewhere in the hierarchy that is bypassing the pwmbus layer and is talking directly to the hardware driver via cross-hierarchy connections established using fdt data. The pwmc driver is now a child of pwmbus, instead of being its sibling (that's why the get_bus method is no longer needed; pwmc now gets the device_t of the bus using device_get_parent()).