From mboxrd@z Thu Jan 1 00:00:00 1970 From: henrik@henriknordstrom.net (Henrik =?ISO-8859-1?Q?Nordstr=F6m?=) Date: Wed, 12 Jun 2013 10:29:48 +0200 Subject: [linux-sunxi] [PATCHv4 7/9] ARM: sun5i: dt: Add i2c muxing options In-Reply-To: <1371024438-16631-8-git-send-email-maxime.ripard@free-electrons.com> References: <1371024438-16631-1-git-send-email-maxime.ripard@free-electrons.com> <1371024438-16631-8-git-send-email-maxime.ripard@free-electrons.com> Message-ID: <1371025788.4659.20.camel@localhost> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org ons 2013-06-12 klockan 10:07 +0200 skrev Maxime Ripard: > + i2c0_pins_a: i2c0 at 0 { > + allwinner,pins = "PB0", "PB1"; > + allwinner,function = "i2c0"; > + allwinner,drive = <0>; > + allwinner,pull = <0>; Is this right? All other use pull = 1. I guess it's board dependent depending on if there is external pullups or not on the i2c bus. I have seen Allwinner designs both with and without external pullups. It will not work well if there is neither internal or external pullup. And may stress the i2c components a bit if there is both.. Regards Henrik