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Commit 0e4190d7 authored by David Mosberger-Tang's avatar David Mosberger-Tang Committed by Guenter Roeck
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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: default avatarDavid Mosberger-Tang <davidm@egauge.net>
Link: https://lore.kernel.org/r/20211120212849.2300854-2-davidm@egauge.net


Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
parent 214f5252
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