src/sys/dev/pcf, branch release/12.3.0

MFC r343496:

2019-02-01T03:26:10Z

pcf(4): fix parentheses in if condition PR: 210709 Submitted by: David Binderman

sys/dev: further adoption of SPDX licensing ID tags.

2017-11-27T14:52:40Z

Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.

sys/dev: minor spelling fixes.

2016-05-03T03:41:25Z

Most affect comments, very few have user-visible effects.

Cleanup unnecessary semicolons from the kernel.

2016-04-10T23:07:00Z

Found with devel/coccinelle.

Convert rman to use rman_res_t instead of u_long

2016-01-27T02:23:54Z

Summary: Migrate to using the semi-opaque type rman_res_t to specify rman resources. For now, this is still compatible with u_long. This is step one in migrating rman to use uintmax_t for resources instead of u_long. Going forward, this could feasibly be used to specify architecture-specific definitions of resource ranges, rather than baking a specific integer type into the API. This change has been broken out to facilitate MFC'ing drivers back to 10 without breaking ABI. Reviewed By: jhb Sponsored by: Alex Perez/Inertial Computing Differential Revision: https://reviews.freebsd.org/D5075

Use IIC_EBUSBSY and IIC_BUSERR status values consistantly across all drivers.

2015-10-09T22:49:50Z

Make it clearer what each one means in the comments that define them. IIC_BUSBSY was used in many places to mean two different things, either "someone else has reserved the bus so you have to wait until they're done" or "the signal level on the bus was not in the state I expected before/after issuing some command". Now IIC_BUSERR is used consistantly to refer to protocol/signaling errors, and IIC_BUSBSY refers to ownership/reservation of the bus.

Make ofw_bus_get_node() consistently return -1 when there is no associated

2012-03-15T22:53:39Z

OF node, instead of a random mixture of 0 and -1. Update all checks for 0 to check for -1 instead. MFC after: 4 weeks

strict kobj signatures: fix iicbus_write impl in dev/pcf

2009-06-11T17:15:44Z

input buf is const Reviewed by: imp, current@ Approved by: jhb (mentor)

- Consolidate module version for the pcf module into just pcf.c instead

2008-08-05T17:39:37Z

of having duplicate versions in each bus attachment. - Add a DRIVER_MODULE() instance so that the iicbus(4) driver will actually attach to pcf(4) driver instances. - Fix compile of envctrl.c. Pointy hat: jhb (3)

Add locking to the various iicbus(4) bridge drivers:

2008-08-04T20:46:15Z

- Just grab Giant in the ixp425_iic(4) driver since this driver uses a shared address/data register window pair to access the actual I2C registers. None of the other ixp425 drivers lock access to these shared address/data registers yet and that would need to be done before this could use any meaningful locking. - Add locking to the interrupt handler and 'iicbus_reset' methods of the at91_twi(4) driver. - Add locking to the pcf(4) driver. Other pcf(4) fixes include: - Don't needlessly zero the softc. - Use bus_foo rather than bus_space_foo and remove bus space tag and handle from softc. - The lpbb(4) driver just grabs Giant for now. This will be refined later when ppbus(4) is locked. - As was done with smbus earlier, move the DRIVER_MODULE() lines to match the bus driver (either iicbus or iicbb) to the bridge driver into the bridge drivers. Tested by: sam (arm/ixp425)