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misc: fuse: support to access fuse on i.MX93

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i.MX93 fuse can be accessed through FSB and s400-api. Add mapping tables
for i.MX93. The offset address of FSB accessing OTP shadow registers is
different between i.MX8ULP and i.MX93, so use macro to define the offset
address instead of hardcode.

Signed-off-by: Alice Guo <alice.guo@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Alice Guo 2022-07-26 16:40:59 +08:00 committed by Stefano Babic
parent 5d78ff733d
commit 31b3ca5527
2 changed files with 31 additions and 1 deletions
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2
arch/arm/include/asm/arch-imx9/imx-regs.h
View File

@ -19,6 +19,8 @@
#define WDG4_BASE_ADDR 0x424a0000UL
#define WDG5_BASE_ADDR 0x424b0000UL
#define FSB_BASE_ADDR 0x47510000UL
#if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))
#include <asm/types.h>
#include <stdbool.h>

30
drivers/misc/sentinel/fuse.c
View File

@ -31,6 +31,9 @@ struct s400_map_entry {
u32 s400_index;
};
#if defined(CONFIG_IMX8ULP)
#define FSB_OTP_SHADOW 0x800
struct fsb_map_entry fsb_mapping_table[] = {
{ 3, 8 },
{ 4, 8 },
@ -65,6 +68,31 @@ struct s400_map_entry s400_api_mapping_table[] = {
{ 23, 1, 4, 2 }, /* OTFAD */
{ 25, 8 }, /* Test config2 */
};
#elif defined(CONFIG_ARCH_IMX9)
#define FSB_OTP_SHADOW 0x8000
struct fsb_map_entry fsb_mapping_table[] = {
{ 0, 8 },
{ 1, 8 },
{ 2, 8 },
{ -1, 8 },
{ 4, 8 },
{ 5, 8 },
{ 6, 8 }, /* UID */
{ -1, 8 },
{ 8, 8 },
{ 9, 8 },
{ 10, 8 },
};
struct s400_map_entry s400_api_mapping_table[] = {
{ 3, 11 }, /* 24 .. 34 */
{ 7, 8 },
{ 16, 11 }, /* 128 .. 143 */
{ 22, 8 },
{ 23, 8 },
};
#endif
static s32 map_fsb_fuse_index(u32 bank, u32 word, bool *redundancy)
{
@ -128,7 +156,7 @@ int fuse_sense(u32 bank, u32 word, u32 *val)
word_index = map_fsb_fuse_index(bank, word, &redundancy);
if (word_index >= 0) {
*val = readl((ulong)FSB_BASE_ADDR + 0x800 + (word_index << 2));
*val = readl((ulong)FSB_BASE_ADDR + FSB_OTP_SHADOW + (word_index << 2));
if (redundancy)
*val = (*val >> ((word % 2) * 16)) & 0xFFFF;