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misc: k3_fuse: Limit writes to 25bit values

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K3 OTP bits can only be programmed 25bits at a time. Limit the value
accordingly using a 25 bit mask.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Anshul Dalal <anshuld@ti.com>
This commit is contained in:
Vignesh Raghavendra
2026-02-26 11:18:15 +05:30
committed by Tom Rini
parent b533d457ae
commit 34c7bcacfa
1 changed files with 3 additions and 3 deletions
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6
drivers/misc/k3_fuse.c
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@@ -7,6 +7,7 @@
#include <stdio.h>
#include <fuse.h>
#include <linux/arm-smccc.h>
#include <linux/bitops.h>
#include <string.h>
#define K3_SIP_OTP_WRITEBUFF 0xC2000000
@@ -41,7 +42,6 @@ int fuse_sense(u32 bank, u32 word, u32 *val)
int fuse_prog(u32 bank, u32 word, u32 val)
{
struct arm_smccc_res res;
u32 mask = val;
if (bank != 0U) {
printf("Invalid bank argument, ONLY bank 0 is supported\n");
@@ -49,8 +49,8 @@ int fuse_prog(u32 bank, u32 word, u32 val)
}
/* Make SiP SMC call and send the word, val and mask in the parameter register */
arm_smccc_smc(K3_SIP_OTP_WRITE, word,
val, mask, 0, 0, 0, 0, &res);
arm_smccc_smc(K3_SIP_OTP_WRITE, bank, word,
val, GENMASK(25, 0), 0, 0, 0, &res);
if (res.a0 != 0) {
printf("SMC call failed: Error code %ld\n", res.a0);