Date: Sat, 5 Jul 2014 12:35:01 -0600 From: Tom Everett <tom@khubla.com> To: Ian Lepore <ian@freebsd.org> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: Status of iic on wandboard Message-ID: <CAB3ij4APXL00jBVfo2FyYOv=sZHhDqUqkWs4EnNkaVZP72jQDA@mail.gmail.com> In-Reply-To: <1404326769.20883.396.camel@revolution.hippie.lan> References: <CAB3ij4CCyHO3tTx23MWDQcW45_L=HiwC0QJgTX4HG_Bj=X7dUg@mail.gmail.com> <1404326769.20883.396.camel@revolution.hippie.lan>
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ok, so I enabled iic and iicbus in the IMX6 kernel config. I also added
this to imx6.dtsi (below).
i2c@021a0000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx-i2c";
reg = <0x021a0000 0x4000>;
interrupt-parent = <&gic>; interrupts =
<68>;
};
i2c@021a4000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx-i2c";
reg = <0x021a4000 0x4000>;
interrupt-parent = <&gic>; interrupts =
<69>;
};
i2c@021a8000 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx-i2c";
reg = <0x021a8000 0x4000>;
interrupt-parent = <&gic>; interrupts =
<70>;
};
kldstat shows that the modules are there:
$ kldstat -v | grep iic
13 iichb/iicbus
12 iicbus/iic
55 iichb/ofw_iicbus
54 iicbb/ofw_iicbus
and opfwdump shows that the DTS data is there:
root@wandboard:/dev # ofwdump -a
Node 0x38:
Node 0xa8: cpus
Node 0xd4: cpu@0
Node 0x190: aliases
Node 0x1bc: soc@00000000
Node 0x230: generic-interrupt-controller@00a00100
Node 0x2cc: mp_tmr0@00a00200
Node 0x348: l2-cache@00a02000
Node 0x3d0: aips@02000000
Node 0x458: ccm@020c4000
Node 0x4b4: anatop@020c8000
Node 0x520: timer@02098000
Node 0x594: gpio@0209c000
Node 0x668: gpio@020a0000
Node 0x71c: gpio@020a4000
Node 0x7f0: gpio@020a8000
Node 0x8a4: gpio@020ac000
Node 0x958: gpio@020b0000
Node 0xa0c: gpio@020b4000
Node 0xac0: serial@02020000
Node 0xb4c: serial@021e8000
Node 0xbdc: serial@021ec000
Node 0xc6c: serial@021f0000
Node 0xcfc: serial@021f4000
Node 0xd8c: usbphy@020c9000
Node 0xe2c: usbphy@020ca000
Node 0xed0: aips@02100000
Node 0xf58: ethernet@02188000
Node 0xfec: usb@02184000
Node 0x1088: usb@02184200
Node 0x1124: usb@02184400
Node 0x11b4: usb@02184600
Node 0x1244: usbmisc@02184800
Node 0x12c4: usdhc@02190000
Node 0x1368: usdhc@02194000
Node 0x1404: usdhc@02198000
Node 0x14a8: usdhc@0219c000
Node 0x1538: i2c@021a0000
Node 0x15d0: i2c@021a4000
Node 0x1668: i2c@021a8000
Node 0x1700: ocotp@021bc000
Node 0x1750: memory
Node 0x1774: chosen
However, the device is not detected on boot. Where do I look next?
On Wed, Jul 2, 2014 at 12:46 PM, Ian Lepore <ian@freebsd.org> wrote:
> On Sun, 2014-06-29 at 18:47 -0600, Tom Everett wrote:
> > I see that there is an i2c driver for imx on the source tree, and there
> are
> > iic kernel options in /conf/IMX6, commented out. Does anyone know the
> > status of i2c for IMX?
> >
> >
>
> It works. I used it to write values to an i2c eeprom and read them back
> a few weeks ago. I haven't tested any other devices yet.
>
> -- Ian
>
>
>
--
A better world shall emerge based on faith and understanding - Douglas
MacArthur
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