From 1529c5791e03610aa6f53bd103afd20f5a8bb1f2 Mon Sep 17 00:00:00 2001
From: Kieran Bingham <kieran@bingham.xyz>
Date: Tue, 25 Oct 2016 17:26:15 +0100
Subject: [PATCHv6 00/11] i2c: Relax mandatory I2C ID table passing
Version 6 of this patchset adds two new patches on top of the existing
submission to resolve the (final?) pending question from the previous
discussions during v5 [0]. Javier's tags are also collected here.
In particular, the remaining issue was that a user could provide a full
vendor prefixed string to the sysfs interface to instantiate an i2c
device. In version 5 of this submission this would not have matched
against a device driver as highlighted by the test patch provided by
Wolfram.
As such, in this series I have extended i2c_of_match_device_strip_vendor
so that it will also perform a search against a full compatible string
for the matching process. This was not done by the core OF framework as
the sysfs interface does not create an of_node to match against. If so
desired, this function could now be renamed to i2c_of_match_device_sysfs
Patch 11/11 of this series brings back Wolframs test case (correctly this
time) and also serves as a demonstration as to how to map the ID's when
matched against an of-style node. Note that this patch is *not* signed
off and not suitable for integration.
[0] [PATCHv5 0/8] 2c: Relax mandatory I2C ID table passing
https://lkml.org/lkml/2016/5/4/534
Kieran Bingham (3):
i2c: match dt-style device names from sysfs interface
i2c: match vendorless strings on the internal string length
[TESTPATCH] rtc: convert ds1307 to interim probe_new
Lee Jones (8):
i2c: Add pointer dereference protection to i2c_match_id()
i2c: Add the ability to match device to compatible string without an
of_node
i2c: Match using traditional OF methods, then by vendor-less
compatible strings
i2c: Make I2C ID tables non-mandatory for DT'ed devices
i2c: Export i2c_match_id() for direct use by device drivers
i2c: Provide a temporary .probe_new() call-back type
mfd: 88pm860x: Move over to new I2C device .probe() call
mfd: as3722: Rid driver of superfluous I2C device ID structure
drivers/i2c/i2c-core.c | 85 ++++++++++++++++++++++++++++++++++++++++-----
drivers/mfd/88pm860x-core.c | 5 ++-
drivers/mfd/as3722.c | 12 ++-----
drivers/rtc/rtc-ds1307.c | 53 ++++++++++++++++------------
include/linux/i2c.h | 22 +++++++++++-
5 files changed, 132 insertions(+), 45 deletions(-)
--
2.7.4
[TESTPATCH] rtc: convert ds1307 to interim probe_new
Just for testing, specify a maxim,ds1307 device to identify the code path used
when instantiating the driver from userspace.
root@arm:~# echo maxim,ds1307 0x68 > /sys/bus/i2c/devices/i2c-2/new_device
[ 49.807383] rtc-ds1307 2-0068: I'm a Maxim ...
[ 49.814706] rtc-ds1307 2-0068: rtc core: registered maxim,ds1307 as rtc0
[ 49.821813] rtc-ds1307 2-0068: 56 bytes nvram
[ 49.826444] i2c i2c-2: new_device: Instantiated device maxim,ds1307 at 0x68
This patch also demonstrates how to obtain data from the id's using the
new methods.
1 file changed
