Hi Richard,
On 20/09/12 20:38, Richard Cochran wrote:
I am running mainline Linux on the Freescale/Axiom M5234BCC with uboot
2011.09-01111-g0562219 and have been carrying along a patch from the
uClinux-dist, like shown below for v3.2.9.
I create a image by concatenating the kernel with a romfs, and I boot
it by loading over tftp and jumping to the image with the uboot 'go'
command.
My question: Is there a way to pass the kernel command line from uboot
to specify the root device, instead of using this patch?
I haven't used uboot on ColdFire, so I am not sure if there is a
standard way to pass kernel parameters.
But you can always build command line options into your kernel config.
Look in the "Kernel Hacking" -> "Compiled-in Kernel Boot Parameter".
I always do this with stock kernels, setting the command line to
"root=/dev/mtdblock0" in the config.
Regards
Greg
diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
index 6793074..9cf7df5 100644
--- a/drivers/mtd/maps/uclinux.c
+++ b/drivers/mtd/maps/uclinux.c
@@ -15,6 +15,7 @@
#include <linux/fs.h>
#include <linux/mm.h>
#include <linux/major.h>
+#include <linux/root_dev.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
@@ -89,6 +90,7 @@ static int __init uclinux_mtd_init(void)
mtd->priv = mapp;
uclinux_ram_mtdinfo = mtd;
+ ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 0);
mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS);
return(0);
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