linux-kernel - [PATCH 1/3] nvmem: qfprom: Increase fuse blow timeout to prevent write fail

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Message-Id: <20220223223502.29454-2-srinivas.kandagatla@linaro.org>
Date:   Wed, 23 Feb 2022 22:35:00 +0000
From:   Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To:     gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Knox Chiou <knoxchiou@...omium.org>,
        Douglas Anderson <dianders@...omium.org>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: [PATCH 1/3] nvmem: qfprom: Increase fuse blow timeout to prevent write fail

From: Knox Chiou <knoxchiou@...omium.org>

sc7180 blow fuses got slightly chances to hit qfprom_reg_write timeout.
Current timeout is simply too low. Since blowing fuses is a
very rare operation, so the risk associated with overestimating this
number is low.
Increase fuse blow timeout from 1ms to 10ms.

Signed-off-by: Knox Chiou <knoxchiou@...omium.org>
Reviewed-by: Douglas Anderson <dianders@...omium.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
 drivers/nvmem/qfprom.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c
index 061293f9136b..162132c7dab9 100644
--- a/drivers/nvmem/qfprom.c
+++ b/drivers/nvmem/qfprom.c
@@ -22,7 +22,7 @@
 
 /* Amount of time required to hold charge to blow fuse in micro-seconds */
 #define QFPROM_FUSE_BLOW_POLL_US	100
-#define QFPROM_FUSE_BLOW_TIMEOUT_US	1000
+#define QFPROM_FUSE_BLOW_TIMEOUT_US	10000
 
 #define QFPROM_BLOW_STATUS_OFFSET	0x048
 #define QFPROM_BLOW_STATUS_BUSY		0x1
-- 
2.21.0