https://git.kernel.org/cgit/linux/kernel/git/powerpc/linux.git/tree/arch/powerpc/boot/dts/fsl/p2041si-post.dtsi#n395
Best Regards, Zhenhua > -----Original Message----- > From: Nora Björklund [mailto:[email protected]] > Sent: Wednesday, March 09, 2016 8:35 PM > To: Zhenhua Luo <[email protected]> > Cc: [email protected] > Subject: Re: [meta-freescale] [meta-fsl-ppc]: Enable gpio expander for p2041? > > Hi Zhenhua, > > Thanks for the reply. Which upstream kernel was the expander merged into? > > I was looking in > git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git and in > git://git.freescale.com/ppc/sdk/linux.git but did not find the gpio- expander. > > Best Regards, > Nora > > On Wed, 2016-03-09 at 09:52 +0000, Zhenhua Luo wrote: > > 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: [email protected] [mailto:meta- > > > freescale- > > > [email protected]] On Behalf Of Nora Bj?rklund > > > Sent: Monday, March 07, 2016 9:25 PM > > > To: [email protected] > > > 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 > > > [email protected] > > > https://lists.yoctoproject.org/listinfo/meta-freescale -- _______________________________________________ meta-freescale mailing list [email protected] https://lists.yoctoproject.org/listinfo/meta-freescale
