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nandbcb: read boot search count from fuse for imx8qxp 

add support for imx8qxp to read boot search count from fuse in nandbcb

Signed-off-by: Han Xu <han.xu@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Han Xu 2020-05-05 22:04:04 +08:00 committed by Stefano Babic
parent 214b7d534d
commit f797fe84fc
1 changed files with 38 additions and 1 deletions
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39
arch/arm/mach-imx/cmd_nandbcb.c
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@ -27,6 +27,7 @@
#include <mxs_nand.h>
#include <linux/mtd/mtd.h>
#include <nand.h>
#include <fuse.h>
#include "../../../cmd/legacy-mtd-utils.h"
@ -1260,6 +1261,35 @@ static bool check_fingerprint(void *data, int fingerprint)
return (*(int *)(data + off) == fingerprint);
}
static int fuse_to_search_count(u32 bank, u32 word, u32 mask, u32 off)
{
int err;
u32 val;
int ret;
/* by default, the boot search count from fuse should be 2 */
err = fuse_read(bank, word, &val);
if (err)
return 2;
val = (val & mask) >> off;
switch (val) {
case 0:
ret = 2;
break;
case 1:
case 2:
case 3:
ret = 1 << val;
break;
default:
ret = 2;
}
return ret;
}
static int nandbcb_dump(struct boot_config *boot_cfg)
{
int i;
@ -1459,7 +1489,14 @@ static int do_nandbcb(cmd_tbl_t *cmdtp, int flag, int argc,
return CMD_RET_FAILURE;
}
/* TODO: set the boot search count if need to read from fuse */
if (plat_config.misc_flags & BT_SEARCH_CNT_FROM_FUSE) {
if (is_imx8qxp()) {
g_boot_search_count = fuse_to_search_count(0, 720,
0xc0, 6);
printf("search count set to %d from fuse\n",
g_boot_search_count);
}
}
cmd = argv[1];
--argc;