From: Lukasz Majewski <l.majewski@samsung.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] question about software i2c multi instance
Date: Mon, 23 Mar 2015 09:28:28 +0100 [thread overview]
Message-ID: <20150323092828.7a22c885@amdc2363> (raw)
In-Reply-To: <550BEBEC.7060609@atmel.com>
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However, such approach might be outdated, since Przemek is working on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
next prev parent reply other threads:[~2015-03-23 8:28 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-20 9:44 [U-Boot] question about software i2c multi instance Bo Shen
2015-03-20 10:10 ` Heiko Schocher
2015-03-23 6:27 ` Bo Shen
2015-03-23 8:28 ` Lukasz Majewski [this message]
2015-03-23 8:36 ` Bo Shen
2015-03-23 8:47 ` Przemyslaw Marczak
2015-03-23 9:09 ` Bo Shen
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