diff options
| author | David Mosberger-Tang <davidm@egauge.net> | 2021-11-20 21:28:56 +0000 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2021-11-20 14:44:25 -0800 |
| commit | 0e4190d762ef2609111507e1b9553a166436f556 (patch) | |
| tree | d2d522ef5f68aca3debc672842850333a492a0c5 /drivers/hwmon/pmbus | |
| parent | 214f525255069a55b4664842c68bc15b2ee049f0 (diff) | |
hwmon: (sht4x) Fix EREMOTEIO errors
Per datasheet, SHT4x may need up to 8.2ms for a "high repeatability"
measurement to complete. Attempting to read the result too early
triggers a NAK which then causes an EREMOTEIO error.
This behavior has been confirmed with a logic analyzer while running
the I2C bus at only 40kHz. The low frequency precludes any
signal-integrity issues, which was also confirmed by the absence of
any CRC8 errors. In this configuration, a NAK occurred on any read
that followed the measurement command within less than 8.2ms.
Signed-off-by: David Mosberger-Tang <davidm@egauge.net>
Link: https://lore.kernel.org/r/20211120212849.2300854-2-davidm@egauge.net
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon/pmbus')
0 files changed, 0 insertions, 0 deletions