From: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> 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 Write-Read Process Call 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 two ioctl commands for issuing GO_COMMAND and reading the state of the adm1266 sequencer. 5. Blackboxes 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. Expose BLACKBOX_INFO register through debugfs. 7. Device tree bindings for ADM1266. Alexandru Tachici (7): hwmon: pmbus: adm1266: add support hwmon: pmbus: adm1266: Add Block process call hwmon: pmbus: adm1266: Add support for GPIOs hwmon: pmbus: adm1266: Add ioctl commands hwmon: pmbus: adm1266: read blackbox hwmon: pmbus: adm1266: debugfs for blackbox info dt-bindings: hwmon: Add bindings for ADM1266 Changelog v3 -> v4: - moved pmbus_block_wr (pmbus process call) from pmbus_core. to adm1266.c and renamed to pmbus_block_xfer - in pmbus_block_xfer: fixed buffer size bug (from 255 to 257) - in adm1266_gpio_get_multiple: handle pdios and gpios one at a time to lower allocated space on stack - in adm1266_gpio_dbg_show: replaced write_buf with u8 write_cmd var - in adm1266_gpio_dbg_show: check number of bytes received from device returned by pmbus_block_xfer. - now use ioctl to send GO_COMMAND and retrieve current state of adm1266 - split blackbox commit into blackbox nvmem implementation and debugfs blackbox info debugfs - create adm1266 debugfs dir under /sys/kernel/debug/pmbus/hwmon for blackbox_info .../bindings/hwmon/adi,adm1266.yaml | 56 ++ Documentation/hwmon/adm1266.rst | 50 ++ .../userspace-api/ioctl/ioctl-number.rst | 1 + drivers/hwmon/pmbus/Kconfig | 10 + drivers/hwmon/pmbus/Makefile | 1 + drivers/hwmon/pmbus/adm1266.c | 657 ++++++++++++++++++ include/uapi/linux/adm1266.h | 16 + 7 files changed, 791 insertions(+) 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 create mode 100644 include/uapi/linux/adm1266.h -- 2.20.1
