From mboxrd@z Thu Jan  1 00:00:00 1970
From: Lukasz Majewski <l.majewski@samsung.com>
Date: Mon, 23 Mar 2015 09:28:28 +0100
Subject: [U-Boot] question about software i2c multi instance
In-Reply-To: <550BEBEC.7060609@atmel.com>
References: <550BEBEC.7060609@atmel.com>
Message-ID: <20150323092828.7a22c885@amdc2363>
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To: u-boot@lists.denx.de

Hi Bo,

> Hi Heiko,
>    After check the software i2c code, I found it can not support
> multi instances, although it has I2C_SOFT_DECLARATIONS2, 
> I2C_SOFT_DECLARATIONS3, I2C_SOFT_DECLARATIONS4.
>    Because, when do GPIO operation, there is only one pair of 
> CONFIG_SOFT_I2C_GPIO_SCL and CONFIG_SOFT_I2C_GPIO_SDA.
>    So, if want to support multi instances, it needs to extend the
> GPIO configuration for SCL/SDA, am I right?

Some time ago we had a similar problem with SW I2C code. Please look
into Samsung's trats board implementation.

However, such approach might be outdated, since Przemek is working on
porting this functionality to device model:

https://patchwork.ozlabs.org/patch/448460/

> 
>    Thanks.
> 
> Best Regards,
> Bo Shen



-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group