Commit 95ed6757 authored by Chris Lesiak's avatar Chris Lesiak Committed by Zheng Zengkai
Browse files

iio: humidity: hdc100x: Add margin to the conversion time

stable inclusion
from stable-5.10.60
commit 632279e5057ce39f43789e696dc9976d4a2e27a3
bugzilla: 177018 https://gitee.com/openeuler/kernel/issues/I4EAUG

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=632279e5057ce39f43789e696dc9976d4a2e27a3



--------------------------------

commit 84edec86 upstream.

The datasheets have the following note for the conversion time
specification: "This parameter is specified by design and/or
characterization and it is not tested in production."

Parts have been seen that require more time to do 14-bit conversions for
the relative humidity channel.  The result is ENXIO due to the address
phase of a transfer not getting an ACK.

Delay an additional 1 ms per conversion to allow for additional margin.

Fixes: 4839367d ("iio: humidity: add HDC100x support")
Signed-off-by: default avatarChris Lesiak <chris.lesiak@licor.com>
Acked-by: default avatarMatt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20210614141820.2034827-1-chris.lesiak@licor.com


Cc: <Stable@vger.kernel.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarChen Jun <chenjun102@huawei.com>
Acked-by: default avatarWeilong Chen <chenweilong@huawei.com>
Signed-off-by: default avatarChen Jun <chenjun102@huawei.com>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
parent d200d93d
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