linux-kernel - [PATCHv4 0/7] Convert exiting EEPROM drivers to NVMEM

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Date:	Wed, 17 Feb 2016 00:41:30 +0100
From:	Andrew Lunn <andrew@...n.ch>
To:	GregKH <greg@...ah.com>
Cc:	srinivas.kandagatla@...aro.org, maxime.ripard@...e-electrons.com,
	wsa@...-dreams.de, broonie@...nel.org, vz@...ia.com, fd@...com,
	linux-kernel@...r.kernel.org, pantelis.antoniou@...sulko.com,
	bgolaszewski@...libre.com, Andrew Lunn <andrew@...n.ch>
Subject: [PATCHv4 0/7] Convert exiting EEPROM drivers to NVMEM

This patch set converts the old EEPROM drivers in driver/misc/eeprom to
use the NVMEM framework. These drivers export there content in /sys as
read only to root, since the EEPROM may contain sensitive information.
So the first patch adds a flag so the NVMEM framework will create its
file in /sys as root read only.

To keep backwards compatibility with these older drivers, the contents
of the EEPROM must be exports in sysfs in a file called eeprom in the
devices node in sys, where as the NVMEM places them under class/nvmem.
So add this optional backwards compatible to the framework, again
using a flag.

Then convert the at24, at25 and 93xx46 by adding regmap support,
removing each drivers own /sys code and registering with the NVMEM
framework.

AT24 and 93xx46 has been boot tested, at25 compile tested only.

v2:

nvmem_register() now supports a backwards compatible flag, and the
Kconfig option has been removed.

v3:

Rebase on v4.5-rc1.
Add a patch to replace memory_accessor in the setup() callbacks with
nvmem API calls

v4:

Rebase on v4.5-rc3
Fix lockdep key in patch #2

Andrew Lunn (7):
  nvmem: Add flag to export NVMEM to root only
  nvmem: Add backwards compatibility support for older EEPROM drivers.
  eeprom: at24: extend driver to plug into the NVMEM framework
  eeprom: at25: Remove in kernel API for accessing the EEPROM
  eeprom: at25: extend driver to plug into the NVMEM framework
  eeprom: 93xx46: extend driver to plug into the NVMEM framework
  misc: at24: replace memory_accessor with nvmem_device_read

 arch/arm/mach-davinci/board-mityomapl138.c |   5 +-
 arch/arm/mach-davinci/common.c             |   4 +-
 drivers/misc/eeprom/Kconfig                |   6 ++
 drivers/misc/eeprom/at24.c                 | 130 +++++++++++++------------
 drivers/misc/eeprom/at25.c                 | 148 +++++++++++++----------------
 drivers/misc/eeprom/eeprom_93xx46.c        | 122 +++++++++++++++++++-----
 drivers/nvmem/core.c                       | 141 +++++++++++++++++++++++++--
 include/linux/davinci_emac.h               |   4 +-
 include/linux/memory.h                     |  11 ---
 include/linux/nvmem-provider.h             |   5 +-
 include/linux/platform_data/at24.h         |  10 +-
 include/linux/spi/eeprom.h                 |   2 -
 12 files changed, 387 insertions(+), 201 deletions(-)

-- 
2.7.0