[PATCHv5 2/3] ARM: imx: Add gpio-keys to plat-mxc
LW at KARO-electronics.de
Mon Oct 25 03:02:57 EDT 2010
Uwe Kleine-König writes:
> Hi Lothar,
> On Sun, Oct 24, 2010 at 10:37:19AM +0200, Lothar Waßmann wrote:
> > Hi,
> > > >> How do you suggest I define this pin for Babbage board only? Do I add to iomux-mx51.h
> > > >> #define MX51_BABBAGE_PAD_EIM_A27__GPIO_2_21 IOMUX_PAD(0x45c, 0x0c8, 1, 0x0,
> > > >0,MX51_GPIO_PAD_CTRL | PAD_CTL_PUS_100K_UP) ?
> > > >>
> > > >> Or do I define the pin in the board file with a 100K_UP? Like how eukrea_mbimxsd-baseboard.c did for
> > > >MBIMXSD_GPIO_3_31?
> > > >I'd suggest something local to your machine file. Unfortunately I don't
> > > >see an easy way to reuse the generic MX51_PAD_EIM_A27__GPIO_2_21 to
> > > >define your local symbol. So I think something like you wrote above
> > > >should be fine.
> > > >
> > > >Too bad that
> > > >
> > > > #define MX51_BABBAGE_PAD_EIM_A27__GPIO_2_21 (MX51_PAD_EIM_A27__GPIO_2_21 | PAD_CTL_PUS_100K_UP)
> > > >
> > > >doesn't work.
> > >
> > > Yes, I also wish I didn't have to redefine the pin just because of PAD setting change. I am going to send out another patch that basically sets the pad_desc.pad_ctrl=PAD_SETTING in mxc_init_board() function. I think it's a bit cleaner than having to redefine the pin.
> > >
> > IMO the 'struct pad_desc' should be replaced with an u64 bitmap that
> > would allow for the pullup and other definitions that may be board
> > specific to be simply or'ed to the pad definition.
> > I could try to provide a patch if this is agreed on.
> Hmm, I thought about that, too, when writing my mail and when I added
> the needed space for a struct pad_desc I stopped when it became >64.
> Somehow I must have got it wrong. After rechecking now it's ==64, so
> yes, I'd like it.
What kernel version should I base it on?
The master branch of git://git.pengutronix.de/git/imx/linux-2.6.git?
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