linux-kernel - [PATCH v3 0/6] hwmon: pmbus: adm1266: add support

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Date:   Fri, 29 May 2020 16:05:00 +0300
From:   <alexandru.tachici@...log.com>
To:     <linux-hwmon@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC:     <robh+dt@...nel.org>, <linux@...ck-us.net>,
        Alexandru Tachici <alexandru.tachici@...log.com>
Subject: [PATCH v3 0/6] hwmon: pmbus: adm1266: add support

From: Alexandru Tachici <alexandru.tachici@...log.com>

Add PMBus probing driver for the adm1266 Cascadable
Super Sequencer with Margin Control and Fault Recording.
Driver is using the pmbus_core, creating sysfs files
under hwmon for inputs: vh1->vh4 and vp1->vp13.

1. Add PMBus probing driver for inputs vh1->vh4
and vp1->vp13.

2. Add Block WR command. A pmbus specific implementation
was required because block write with I2C_SMBUS_PROC_CALL
flag allows a maximum of 32 bytes to be received.

3. This makes adm1266 driver expose GPIOs
to user-space. Currently are read only. Future
developments on the firmware will allow
them to be writable.

4. Add debugfs files for go_command and read_state.

5. Blakcboxes are 64 bytes of chip state related data
that is generated on faults. Use the nvmem kernel api
to expose the blackbox chip functionality to userspace.

6. Device tree bindings for ADM1266.

Alexandru Tachici (6):
  hwmon: pmbus: adm1266: add support
  hwmon: (pmbus/core) Add Block WR
  hwmon: pmbus: adm1266: Add support for GPIOs
  hwmon: pmbus: adm1266: add debugfs attr for states
  hwmon: pmbus: adm1266: read blackbox
  dt-bindings: hwmon: Add bindings for ADM1266

Changelog v2 -> v3:
- added block write-read process call in pmbus-core
- expose GPIOs/PDIOs to user-space as readonly
- allow the user to issue commands to adm1266
in go_command debugfs file
- allow the user to read state of the adm1266 sequencer
from debugfs file read_state
- chip generated blackboxes can now be read
from the nvmem file 

 .../bindings/hwmon/adi,adm1266.yaml           |  56 ++
 Documentation/hwmon/adm1266.rst               |  35 ++
 drivers/hwmon/pmbus/Kconfig                   |  11 +-
 drivers/hwmon/pmbus/Makefile                  |   1 +
 drivers/hwmon/pmbus/adm1266.c                 | 500 ++++++++++++++++++
 drivers/hwmon/pmbus/pmbus.h                   |   4 +
 drivers/hwmon/pmbus/pmbus_core.c              |  88 +++
 7 files changed, 694 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/hwmon/adi,adm1266.yaml
 create mode 100644 Documentation/hwmon/adm1266.rst
 create mode 100644 drivers/hwmon/pmbus/adm1266.c

-- 
2.20.1