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

[Heiko Schocher]

Hello Piotr Wilczek,

On 22.10.2012 09:21, Piotr Wilczek wrote:
> 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@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 ...

> 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(-)
>   create mode 100644 drivers/i2c/multi_i2c.c
>   create mode 100644 include/multi_i2c.h

bye,
Heiko
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