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authorEmiliano Ingrassia <ingrassia@epigenesys.com>2018-01-12 23:42:28 +0300
committerGuenter Roeck <linux@roeck-us.net>2018-01-13 01:18:39 +0300
commitabe6c3b06fa80777e321add05345c799a74e624a (patch)
tree8d52e3b9df9910862401d0bd3b725e7b968c4bd1 /drivers/irqchip/irq-partition-percpu.c
parentb0076406495cd5905284d1f235db77d8ab54951e (diff)
downloadlinux-abe6c3b06fa80777e321add05345c799a74e624a.tar.xz
hwmon: (sht3x) wait predefined limits loading complete before access
An sht3x sensor include limits register which contains temperature and humidity limit values. After a reset, pre-defined values are loaded into that register. During the probe function, the driver reads the limits register. However, if the reads are made too early, and the bus is clocked at high frequencies (e.g. 100 kHz or more), the loading could be not completed and the sensor returns a NACK which causes the probe to fail. A delay of at least 500 us before the first read solves this issue. Signed-off-by: Emiliano Ingrassia <ingrassia@epigenesys.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/irqchip/irq-partition-percpu.c')
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