On Wed, Mar 14, 2012 at 08:45:23PM +0800, Dong Aisheng wrote: > On Wed, Mar 14, 2012 at 01:23:51AM +0800, Grant Likely wrote: > > On Tue, 13 Mar 2012 16:47:04 +0800, Dong Aisheng <b29396@xxxxxxxxxxxxx> wrote: > > > From: Dong Aisheng <dong.aisheng@xxxxxxxxxx> > > > > > > This patch includes basic dt support which can boot via nfs rootfs. > > > > > > Signed-off-by: Dong Aisheng <dong.aisheng@xxxxxxxxxx> > > > --- > > > Documentation/devicetree/bindings/arm/fsl.txt | 4 + > > > arch/arm/boot/dts/imx28-evk.dts | 31 +++++++++ > > > arch/arm/boot/dts/imx28.dtsi | 88 +++++++++++++++++++++++++ > > > arch/arm/mach-mxs/Kconfig | 9 +++ > > > arch/arm/mach-mxs/Makefile | 1 + > > > arch/arm/mach-mxs/imx28-dt.c | 67 +++++++++++++++++++ > > > 6 files changed, 200 insertions(+), 0 deletions(-) > > > > > > diff --git a/Documentation/devicetree/bindings/arm/fsl.txt b/Documentation/devicetree/bindings/arm/fsl.txt > > > index 54bddda..9f21faf 100644 > > > --- a/Documentation/devicetree/bindings/arm/fsl.txt > > > +++ b/Documentation/devicetree/bindings/arm/fsl.txt > > > @@ -1,6 +1,10 @@ > > > Freescale i.MX Platforms Device Tree Bindings > > > ----------------------------------------------- > > > > > > +i.MX28 Evaluation Kit > > > +Required root node properties: > > > + - compatible = "fsl,imx28-evk", "fsl,imx28"; > > > + > > > i.MX51 Babbage Board > > > Required root node properties: > > > - compatible = "fsl,imx51-babbage", "fsl,imx51"; > > > diff --git a/arch/arm/boot/dts/imx28-evk.dts b/arch/arm/boot/dts/imx28-evk.dts > > > new file mode 100644 > > > index 0000000..9758dc4 > > > --- /dev/null > > > +++ b/arch/arm/boot/dts/imx28-evk.dts > > > @@ -0,0 +1,31 @@ > > > +/* > > > + * Copyright 2012 Freescale Semiconductor, Inc. > > > + * > > > + * The code contained herein is licensed under the GNU General Public > > > + * License. You may obtain a copy of the GNU General Public License > > > + * Version 2 or later at the following locations: > > > + * > > > + * http://www.opensource.org/licenses/gpl-license.html > > > + * http://www.gnu.org/copyleft/gpl.html > > > + */ > > > + > > > +/dts-v1/; > > > +/include/ "imx28.dtsi" > > > + > > > +/ { > > > + model = "Freescale i.MX28 Evaluation Kit"; > > > + compatible = "fsl,imx28-evk", "fsl,imx28"; > > > + > > > + memory { > > > + device_type = "memory"; > > > + reg = <0x40000000 0x08000000>; > > > + }; > > > + > > > + ahb@80080000 { > > > + fec@800f0000 { > > > + phy-mode = "rmii"; > > > + local-mac-address = [00 04 9F 01 7D 5B]; > > > > Generally a bad idea to put a specific mac address into the device tree. > > Better to fill it with zeros. Otherwise all the dev boards will end up using > > the same value. > > > Yes, this issue also exists on other platfroms like mx6q. > One way is to dynamically get mac address by reading otp register as non-dt does > like: > static int __init mx28evk_fec_get_mac(void) > { > int i; > u32 val; > const u32 *ocotp = mxs_get_ocotp(); > > if (!ocotp) > return -ETIMEDOUT; > > /* > * OCOTP only stores the last 4 octets for each mac address, > * so hard-code Freescale OUI (00:04:9f) here. > */ > for (i = 0; i < 2; i++) { > val = ocotp[i]; > mx28_fec_pdata[i].mac[0] = 0x00; > mx28_fec_pdata[i].mac[1] = 0x04; > mx28_fec_pdata[i].mac[2] = 0x9f; > mx28_fec_pdata[i].mac[3] = (val >> 16) & 0xff; > mx28_fec_pdata[i].mac[4] = (val >> 8) & 0xff; > mx28_fec_pdata[i].mac[5] = (val >> 0) & 0xff; > } > > return 0; > } > > But it seems this needs pass mac address to fec driver via platforom data which is > not friendly to dt. > > Another way may be changing fec driver to get the fixed part of mac address(first > two bytes) from device tree and read the left dynamical part from otp which i'm not > sure is better enough. > > BTW, filling with zeros seems not work since it's invalid mac address. Yes, that's the idea of using this value... Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
