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arm:exynos4: Enable Multi I2C

Heiko Schocher u-boot 1 version New

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  1. v2 Latest0 of 9 patches 0 repliesNew

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Cover letter [U-Boot] [PATCH v2 0/9] arm:exynos4: Enable Multi I2C

Hello Piotr Wilczek,

Quoted 3 lines · Piotr Wilczek

This patchset enables both software and hardware I2C support for Exynos 4. New multi_i2c driver is added to support simultaneous use of hardware and software I2C drivers.

There was some I2C multibus support discussions, the latest was here:

http://www.mail-archive.com/u-boot at lists.denx.de/msg75530.html

I reworked this patches (rebased to current ML, worked in some comments from the ML) and added soft_i2c support as an example for it. Currently compile tested for arm and powerpc, you can find the tree here:

http://git.denx.de/?p=u-boot/u-boot-i2c.git;a=shortlog;h=refs/heads/multibus_v2_20121023

I post this patches to the ML soon, and we should try to bring this base to mainline and you should rebase your work on it ...

Quoted 41 lines

The s3c24x0_i2c driver is modified to use for for both Exynos 4 and Exynos 5. Both s3c24x0_i2c and soft_i2c drivers are modified so can be used separetly (only hardware or only software) or can be used simultaneously. Pinmux setting and clock is add for Exynos4 to support hardware I2C.

This patchset depends on the following patchset:
http://patchwork.ozlabs.org/patch/192742/
http://patchwork.ozlabs.org/patch/192743/
http://patchwork.ozlabs.org/patch/192744/
...
http://patchwork.ozlabs.org/patch/192765/

Changes in v2:
- added multi_i2c driver;
- modified s3c24x0_i2c driver
- modified soft_i2c driver
- modified exynos4_get_i2c_clk function;

Piotr Wilczek (9):
exynos:clock: Add i2c clock
exynos:cpu: Add Exynos4 I2C spacing exynos:pinmux: Add pinmux support for i2c drivers:i2c: Modify I2C driver for Exynos4 drivers:i2c: Add support for multi I2C driver:i2c: Modify Soft I2C driver for Multi-I2C driver:i2c: Modify s3c24x0_i2c driver for Multi-I2C drivers:i2c: modify I2C header for Multi-I2C arm:trats: Use Multi-I2C on Trarts board

  arch/arm/cpu/armv7/exynos/clock.c      |   17 +++++
  arch/arm/cpu/armv7/exynos/pinmux.c     |   51 +++++++++++++
  arch/arm/include/asm/arch-exynos/cpu.h |    2 +
  board/samsung/trats/trats.c            |   35 +++++++++-
  drivers/i2c/Makefile                   |    1 +
  drivers/i2c/multi_i2c.c                |  124 ++++++++++++++++++++++++++++++++
  drivers/i2c/s3c24x0_i2c.c              |   89 +++++++++++++++++++----
  drivers/i2c/soft_i2c.c                 |   60 ++++++++++++++--
  include/configs/trats.h                |    9 ++-
  include/i2c.h                          |   11 +++
  include/multi_i2c.h                    |   62 ++++++++++++++++
  11 files changed, 439 insertions(+), 22 deletions(-)
Quoted 2 lines

create mode 100644 drivers/i2c/multi_i2c.c
create mode 100644 include/multi_i2c.h

bye,
Heiko

Signature · 2 lines
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

Read the cover letter in its thread