[meta-freescale] [meta-fsl-ppc]: Enable gpio expander for p2041?

[Zhenhua Luo]

Hi Nora, 

The PCA9672 is a GPIO expander chip via I2C bus, and no any relative with P2041 GPIO IP block.

P2041 dts file has included the GPIO node in both upstream kernel and SDK2.0 which will be released in 2016 Q2. 


Best Regards,

Zhenhua 

> -----Original Message-----
> From: meta-freescale-bounces at yoctoproject.org [mailto:meta-freescale-
> bounces at yoctoproject.org] On Behalf Of Nora Bj?rklund
> Sent: Monday, March 07, 2016 9:25 PM
> To: meta-freescale at yoctoproject.org
> Subject: [meta-freescale] [meta-fsl-ppc]: Enable gpio expander for p2041?
> 
> Hi all,
> 
> I was working on a p2041rdb target not so long ago and needed to use the gpio
> pins (described in detail in the p2041 reference manual), these are visible on
> the p2041 fact sheet [1]. The pins are connected to a gpio expander, PCA9672
> [2], which is connected to an i2c-bus.
> 
> The expander was not available in the device-tree for p2041rdb so I patched it
> locally to include it. The gpio-expander does not seem to be available in any
> upstream repository either (at this time I was working on a version of the 3.12
> kernel).
> 
> Would this patch be of any interest for meta-fsl-ppc?
> 
> The gpio pins are there on all p2041rdb targets (at least since they are
> mentioned as such in the reference guide), so I could not come up with a
> reason to why it is excluded from the device tree.
> 
> Best Regards,
> Nora Björklund
> 
> -----------------------------
> [1] http://cache.nxp.com/files/32bit/doc/fact_sheet/P2041RDBFS.pdf?fpsp
> =1&WT_TYPE=Fact%20Sheets&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=
> pdf&WT_ASSE
> T=Documentation&fileExt=.pdf (login might be required) [2]
> http://www.nxp.com/products/interface-and-connectivity/interface-an
> d-system-management/i2c/i2c-general-purpose-i-o/remote-8-bit-i-o-
> expander-for-fm-plus-ic-bus-with-interrupt-and-reset:PCA9672
> --
> _______________________________________________
> meta-freescale mailing list
> meta-freescale at yoctoproject.org
> https://lists.yoctoproject.org/listinfo/meta-freescale