On 11/8/21 5:07 PM, Chris Morgan wrote:
From: Chris Morgan macromorgan@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@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
Hi,
Thanks for your patch,
I will test this on my boards at some point, but I can't promise exactly when. If there are any other users of this protocol, I think they should test it as well.
Eugen