On 07/31/2018 04:18 PM, Alan Martinovic wrote: > Hi, > I have an embedded device which gets the roots information > passed as a kernel parameter root=/dev/mmcblk0p2 > > Am currently migrating to a new kernel and porting device > tree changes to be based on the following dts: > https://github.com/friendlyarm/linux/blob/sunxi-4.14.y/arch/arm/boot/dts/sun8i-h3-nanopi-neo.dts > https://github.com/friendlyarm/linux/blob/sunxi-4.14.y/arch/arm/boot/dts/sun8i-h3-nanopi.dtsi > > What I've noticed is that the new kernel/device tree seems to change the > index for mmcblk (it was mmcblk0 with the previous combination for > mainline 4.14 kernel): > > [ 1.962308] sunxi-mmc 1c0f000.mmc: Got CD GPIO > [ 2.003604] sunxi-mmc 1c0f000.mmc: base:0xe0873000 irq:26 > ... ... ... > [ 2.092684] mmc1: host does not support reading read-only switch, > assuming write-enable > [ 2.094600] mmc1: Problem switching card into high-speed mode! > [ 2.094725] mmc1: new SDHC card at address 0001 > [ 2.095211] mmcblk1: mmc1:0001 00000 3.68 GiB > [ 2.097424] mmcblk1: p1 p2 p3 p4 > > > The device tree has the following entries regarded to mmc: > > &mmc0 { > bus-width = <4>; > cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>; > cd-inverted; > pinctrl-names = "default"; > pinctrl-0 = <&mmc0_pins_a>, <&mmc0_cd_pin>; > boot_device = <0>; > status = "okay"; > vmmc-supply = <®_vcc3v3>; > }; > &mmc2 { > boot_device = <0>; > }; > > Is there a way to have the index fixed and stable? > You should use UUIDs or labels. Please read carefully https://lkml.org/lkml/2016/4/29/674 -- Best wishes, Vladimir -- 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
