On Sun, Dec 07, 2014 at 11:11:06PM +0800, Chen-Yu Tsai wrote: > On Sun, Dec 7, 2014 at 11:03 PM, Maxime Ripard > <[email protected]> wrote: > > On Wed, Dec 03, 2014 at 02:36:04PM +0800, Chen-Yu Tsai wrote: > >> mmc2 is available on port C. Add a pinmux setting for usual 4 bit > >> wide bus, as well as one with the 4 extra pins for 8 bit wide bus. > >> > >> Signed-off-by: Chen-Yu Tsai <[email protected]> > >> Signed-off-by: Andreas Färber <[email protected]> > >> --- > >> arch/arm/boot/dts/sun9i-a80.dtsi | 15 +++++++++++++++ > >> 1 file changed, 15 insertions(+) > >> > >> diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi > >> b/arch/arm/boot/dts/sun9i-a80.dtsi > >> index f5b5645..fc866d8 100644 > >> --- a/arch/arm/boot/dts/sun9i-a80.dtsi > >> +++ b/arch/arm/boot/dts/sun9i-a80.dtsi > >> @@ -466,6 +466,21 @@ > >> allwinner,pull = <0>; > >> }; > >> > >> + mmc2_pins: mmc2 { > >> + allwinner,pins = "PC6","PC7","PC8","PC9", > >> + "PC10","PC11"; > >> + allwinner,function = "mmc2"; > >> + allwinner,drive = <2>; > >> + allwinner,pull = <1>; > >> + }; > >> + > >> + mmc2_8bit_pins: mmc2_8bit { > >> + allwinner,pins = "PC12","PC13","PC14","PC15"; > >> + allwinner,function = "mmc2"; > >> + allwinner,drive = <2>; > >> + allwinner,pull = <1>; > >> + }; > >> + > > > > Hmmm, how is that 8 bits? There's only 4 pins here. > > The 8bit setting only includes the upper 4 bits. > Using both settings together you get an 8 bit bus, > along with CMD and CLK pins, for a total of 10 pins. > > Or is this the wrong way?
The way it's usually done is that you have two standalone nodes. Just like what's done for the UARTs for example. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
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