linux-kernel - [PATCH v3 0/3] nvmem: add ONIE NVMEM cells provider

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Date:   Mon, 31 Aug 2020 04:55:36 +0300
From:   Vadym Kochan <vadym.kochan@...ision.eu>
To:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Vadym Kochan <vadym.kochan@...ision.eu>
Subject: [PATCH v3 0/3] nvmem: add ONIE NVMEM cells provider

This series adds cells provider for the ONIE TLV attributes which are
stored on NVMEM device. It adds possibility to read the mac address (and
other info) by other drivers.

There is a special case for this driver that before registering cells
the nvmem device should be first parsed to read the TLV layout which
holds the cells data.

v3:
    1) Update core.c changes by extending notification mechanism
       by adding new NVMEM_PRE_ADD event id which is called before lookup
       table cells binding, this allows for notification handler to
       register cells which require nvmem parsing.

    2) Update onie-cells.c to use nvmem notification to parse and
       register cells before device and cells are finally registered.

       Use subsys_init() macro which allows to probe before nvmem drivers.

    3) at24 driver enables regulator and pm state machine after nvmem
       registration which does not allow to use it on handing NVMEM_PRE_ADD event.

v2:
    1) Fixed wrong memcmp comparison

Vadym Kochan (3):
  nvmem: core: allow to register cells during nvmem registration
  nvmem: add ONIE NVMEM cells support
  misc: eeprom: at24: register nvmem only after eeprom is ready to use

 drivers/misc/eeprom/at24.c     |  11 +-
 drivers/nvmem/Kconfig          |   9 +
 drivers/nvmem/Makefile         |   3 +
 drivers/nvmem/core.c           |   2 +
 drivers/nvmem/onie-cells.c     | 410 +++++++++++++++++++++++++++++++++
 include/linux/nvmem-consumer.h |   1 +
 6 files changed, 432 insertions(+), 4 deletions(-)
 create mode 100644 drivers/nvmem/onie-cells.c

-- 
2.17.1