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
