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linux/drivers/w1/masters
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Martin Fuzzey c9723750a6 w1: mxc_w1: Fix timeout resolution problem leading to bus error 
On my platform (i.MX53) bus access sometimes fails with
	w1_search: max_slave_count 64 reached, will continue next search.

The reason is the use of jiffies to implement a 200us timeout in
mxc_w1_ds2_touch_bit().
On some platforms the jiffies timer resolution is insufficient for this.

Fix by replacing jiffies by ktime_get().

For consistency apply the same change to the other use of jiffies in
mxc_w1_ds2_reset_bus().

Fixes: f80b2581a7 ("w1: mxc_w1: Optimize mxc_w1_ds2_touch_bit()")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Martin Fuzzey <martin.fuzzey@flowbird.group>
Link: https://lore.kernel.org/r/1601455030-6607-1-git-send-email-martin.fuzzey@flowbird.group
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-10-02 15:53:25 +02:00
..
ds1wm.c
ds2482.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
ds2490.c
Kconfig w1: add 1-wire master driver for IP block found in SGI ASICs 2019-09-04 14:34:31 +02:00
Makefile w1: add 1-wire master driver for IP block found in SGI ASICs 2019-09-04 14:34:31 +02:00
matrox_w1.c remove ioremap_nocache and devm_ioremap_nocache 2020-01-06 09:45:59 +01:00
mxc_w1.c w1: mxc_w1: Fix timeout resolution problem leading to bus error 2020-10-02 15:53:25 +02:00
omap_hdq.c w1: omap-hdq: print dev_err if irq flags are not cleared 2020-05-27 12:18:49 +02:00
sgi_w1.c w1: sgi_w1: use devm_platform_ioremap_resource() to simplify code 2019-10-10 15:24:18 +02:00
w1-gpio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00