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Commit 31d0b9f9 authored by Ben Dooks's avatar Ben Dooks Committed by Russell King
Browse files

ARM: 8804/1: zImage: atags_to_fdt: add serial-number for ATAG_SERIAL 



If the system passes an ATAG_SERIAL, convert that into a /serial-number
node so that the system serial number will be passed through the FDT and
be present under the kernel.

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent 7f976867

arch/arm/boot/compressed/atags_to_fdt.c

+23 −0
Original line number Diff line number Diff line
@@ -98,6 +98,24 @@ static void merge_fdt_bootargs(void *fdt, const char *fdt_cmdline) 
	setprop_string(fdt, "/chosen", "bootargs", cmdline);

}



static void hex_str(char *out, uint32_t value)

{

	uint32_t digit;

	int idx;



	for (idx = 7; idx >= 0; idx--) {

		digit = value >> 28;

		value <<= 4;

		digit &= 0xf;

		if (digit < 10)

			digit += '0';

		else

			digit += 'A'-10;

		*out++ = digit;

	}

	*out = '\0';

}



/*

 * Convert and fold provided ATAGs into the provided FDT.

 *
@@ -180,6 +198,11 @@ int atags_to_fdt(void *atag_list, void *fdt, int total_space) 
					initrd_start);

			setprop_cell(fdt, "/chosen", "linux,initrd-end",

					initrd_start + initrd_size);

		} else if (atag->hdr.tag == ATAG_SERIAL) {

			char serno[16+2];

			hex_str(serno, atag->u.serialnr.high);

			hex_str(serno+8, atag->u.serialnr.low);

			setprop_string(fdt, "/", "serial-number", serno);

		}

	}