From: henrik@henriknordstrom.net (Henrik Nordström)
To: linux-arm-kernel@lists.infradead.org
Subject: [linux-sunxi] [PATCHv4 7/9] ARM: sun5i: dt: Add i2c muxing options
Date: Wed, 12 Jun 2013 10:29:48 +0200 [thread overview]
Message-ID: <1371025788.4659.20.camel@localhost> (raw)
In-Reply-To: <1371024438-16631-8-git-send-email-maxime.ripard@free-electrons.com>
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
next prev parent reply other threads:[~2013-06-12 8:29 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-12 8:07 [PATCHv4 0/9] Add I2C support for Allwinner SoCs Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 1/9] i2c: mv64xxx: Add macros to access parts of registers Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 2/9] i2c: mv64xxx: make the registers offset configurable Maxime Ripard
2013-06-12 10:54 ` Andrew Lunn
2013-06-12 11:29 ` Maxime Ripard
2013-06-12 13:57 ` Russell King - ARM Linux
2013-06-12 14:44 ` Maxime Ripard
2013-06-12 14:51 ` Russell King - ARM Linux
2013-06-12 15:17 ` Maxime Ripard
2013-06-12 15:03 ` Sebastian Hesselbarth
2013-06-12 15:37 ` Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 3/9] ARM: orion: pass the i2c registers definition through the platform data Maxime Ripard
2013-06-12 8:39 ` Tomasz Figa
2013-06-12 8:07 ` [PATCHv4 4/9] i2c: mv64xxx: Add Allwinner sun4i compatible Maxime Ripard
2013-06-12 8:42 ` Tomasz Figa
2013-06-12 11:27 ` Maxime Ripard
2013-06-12 10:56 ` Andrew Lunn
2013-06-12 11:31 ` Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 5/9] ARM: sunxi: dt: Add i2c controller nodes to the DTSI Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 6/9] ARM: sun4i: dt: Add i2c muxing options Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 7/9] ARM: sun5i: " Maxime Ripard
2013-06-12 8:29 ` Henrik Nordström [this message]
2013-06-12 11:20 ` [linux-sunxi] " Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 8/9] ARM: sun5i: olinuxino: Enable the i2c controllers Maxime Ripard
2013-06-12 8:07 ` [PATCHv4 9/9] ARM: sun4i: cubieboard: " Maxime Ripard
2013-06-12 11:26 ` [PATCHv4 0/9] Add I2C support for Allwinner SoCs Arnd Bergmann
2013-06-12 11:38 ` Maxime Ripard
2013-06-12 12:38 ` Arnd Bergmann
2013-06-12 12:44 ` Maxime Ripard
2013-06-14 14:01 ` Wolfram Sang
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