[PATCH] w1: w1-gpio: Loosen timings to improve cold boot reliability
Chris Morgan
macroalpha82 at gmail.com
Mon Nov 8 16:07:16 CET 2021
From: Chris Morgan <macromorgan at hotmail.com>
On my NTC CHIP whenever I do a cold boot any attached DIPs cannot be
found. Rebooting on the other hand appears to fix the issue. I found
that if I modified the timing slightly (but still within spec) the
w1 identification on cold boot became far more reliable.
Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
---
drivers/w1/w1-gpio.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/w1/w1-gpio.c b/drivers/w1/w1-gpio.c
index 9346f810ce..5565de2a92 100644
--- a/drivers/w1/w1-gpio.c
+++ b/drivers/w1/w1-gpio.c
@@ -22,8 +22,8 @@
#define W1_TIMING_E 9
#define W1_TIMING_F 55
#define W1_TIMING_G 0
-#define W1_TIMING_H 480
-#define W1_TIMING_I 70
+#define W1_TIMING_H 600
+#define W1_TIMING_I 100
#define W1_TIMING_J 410
struct w1_gpio_pdata {
--
2.30.2
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