From: Vignesh Raghavendra <vigneshr@ti.com>
Date: Thu, 26 Feb 2026 05:48:15 +0000 (+0530)
Subject: misc: k3_fuse: Limit writes to 25bit values
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=34c7bcacfab4a7efe83e0bad259fadc145be0046;p=thirdparty%2Fu-boot.git

misc: k3_fuse: Limit writes to 25bit values

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>
---

diff --git a/drivers/misc/k3_fuse.c b/drivers/misc/k3_fuse.c
index d738f75f272..faafaffe07e 100644
--- a/drivers/misc/k3_fuse.c
+++ b/drivers/misc/k3_fuse.c
@@ -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);