Date: Wed, 20 Mar 2019 09:31:02 -0600 From: Ian Lepore <ian@freebsd.org> To: Daniel Braniss <danny@cs.huji.ac.il> Cc: freebsd-arm@freebsd.org Subject: Re: allwinner i2c [was: Options for FBSD support with LCD device - new project] Message-ID: <c1f805119a09de88d11bf72f99db60e2a2a18577.camel@freebsd.org> In-Reply-To: <C47DE503-1E0E-4475-B62B-0055D2A582E7@cs.huji.ac.il> References: <ad61a598-53af-02a5-41db-0128da7d1a34@optiplex-networks.com> <CAF19XBLAjP4yKtGSBzA4QdT346Bnbnr8MutQNZgmERLbJkWAyA@mail.gmail.com> <8df902f6-20a3-31c4-71ac-91f5d5fdf50d@optiplex-networks.com> <0ecf23e129ca7ac6a92a01bbb34c03f1ac8c6dc8.camel@freebsd.org> <e5d42c67-e1f2-ede1-965f-c89226de46da@optiplex-networks.com> <89f5b8d1ab0614ac8d88b5d5f1afc63e640c3c17.camel@freebsd.org> <4EB5C6C1-7DB9-4DEE-BB23-CD1259581271@jeditekunum.com> <004ddba628b94b80845d8e509ddcb648d21fd6c9.camel@freebsd.org> <C47DE503-1E0E-4475-B62B-0055D2A582E7@cs.huji.ac.il>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, 2019-03-19 at 08:28 +0200, Daniel Braniss wrote: > I have several allwinner SoC, mainly from FriendlyArm, and neither i2c or SPI work. > I have a hacked i2c that mostly works, but hangs sometimes :-), mainly > timing issues of which I have no idea how to fix. > I’m willing to help here but my knowledge of the twsi tends to zero. > hint hint … > > cheers, > danny Iirc, allwinner requires working i2c even to boot, because the boards have i2c PMIC chips on them. I wonder if it's a case where a few small commands to the pmic work fine but bigger transfers fail? I dunno, anything more you can say about the problem would help. -- Ian
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?c1f805119a09de88d11bf72f99db60e2a2a18577.camel>