Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1588924

[RFC 0/3] drivers: Add an API to read device specific config data

Show all headers | View raw

Hi all,

while looking at adding OF support for the ath9k driver I had the problem of
reading the EEPROM data. On the SoC platforms this data is stored in an SPI
flash along with a few other things. In OpenWRT/LEDE this data is read from
the board init code using the fact that the flash is (normaly) readable from
a memory map. A bit too hackish for my taste.

This is just one example, there is various other similar cases, mostly with
MAC addresses. I thought it would be nicer if we had a clean API for this,
similar to the firmware API but per device instance instead of beeing per
driver. The device driver wouldn't have to care where the data is stored,
they just request it and the backend take care of reading the EEPROM, MTD
or whatever is used on the board.

This series implement such an API along with an implementation for MTD
devices and a use in the ath9k driver. As this is an RFC I didn't yet
write the OF binding documentation, that will come later if the feedback
is positive.

Alban Bedel (3):
  drivers: Add an API to read device specific config data
  mtd: Add support for reading device data out of MTD devices
  ath9k: ahb: Add OF support

 drivers/base/Kconfig                   |   6 +
 drivers/base/Makefile                  |   1 +
 drivers/base/devdata.c                 | 204 +++++++++++++++++++++++++++++++++
 drivers/mtd/Kconfig                    |   9 ++
 drivers/mtd/Makefile                   |   1 +
 drivers/mtd/devdata.c                  |  70 +++++++++++
 drivers/net/wireless/ath/ath9k/Kconfig |   1 +
 drivers/net/wireless/ath/ath9k/ahb.c   |  55 +++++++--
 drivers/net/wireless/ath/ath9k/init.c  |  41 ++++++-
 include/linux/devdata.h                |  79 +++++++++++++
 10 files changed, 459 insertions(+), 8 deletions(-)
 create mode 100644 drivers/base/devdata.c
 create mode 100644 drivers/mtd/devdata.c
 create mode 100644 include/linux/devdata.h

-- 
2.7.4

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[RFC 0/3] drivers: Add an API to read device specific config data Alban <albeu@free.fr> - 2017-02-27 21:40 +0100
  [PATCH 3/3] ath9k: ahb: Add OF support Alban <albeu@free.fr> - 2017-02-27 21:50 +0100
    Re: [PATCH 3/3] ath9k: ahb: Add OF support Rafał Miłecki <zajec5@gmail.com> - 2017-02-27 22:20 +0100
      Re: [PATCH 3/3] ath9k: ahb: Add OF support Rafał Miłecki <zajec5@gmail.com> - 2017-02-28 00:00 +0100
      Re: [PATCH 3/3] ath9k: ahb: Add OF support Alban <albeu@free.fr> - 2017-02-28 00:20 +0100
  Re: [RFC 0/3] drivers: Add an API to read device specific config data Marek Vasut <marek.vasut@gmail.com> - 2017-02-27 21:50 +0100
  Re: [RFC 0/3] drivers: Add an API to read device specific config  data Boris Brezillon <boris.brezillon@free-electrons.com> - 2017-02-27 22:40 +0100
    Re: [RFC 0/3] drivers: Add an API to read device specific config data Moritz Fischer <moritz.fischer@ettus.com> - 2017-02-27 23:30 +0100
    Re: [RFC 0/3] drivers: Add an API to read device specific config  data Alban <albeu@free.fr> - 2017-02-27 23:50 +0100

csiph-web