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a134d96ef1
freebsd-nq/sys/dev/iicbus
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Ian Lepore a134d96ef1 Fix nxprtc(4) on systems that support i2c repeat-start correctly. 
An obscure footnote in the datasheets for the PCx2127, PCx2129, and
PCF8523 rtc chips states that the chips do not support i2c repeat-start
operations.  When the driver was originally written and tested, the i2c
bus on that system also didn't support repeat-start and just quietly
turned repeat-start operations into a stop-then-start, making it appear
that the nxprtc driver was working properly.

The repeat-start situation only comes up on reads, so instead of using
the standard iicdev_readfrom(), use a local nxprtc_readfrom(), which is
just a cut-and-pasted copy of iicdev_readfrom(), modified to send two
separate start-data-stop sequences instead of using repeat-start.
2019-07-15 21:40:58 +00:00
..
twsi Add pnpinfo. 2019-05-23 18:19:56 +00:00
ad7417.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
ad7418.c Remove some unused header files from the ad7418 driver. 2019-06-23 17:20:39 +00:00
adm1030.c
adt746x.c Clean up OF_getprop_alloc API 2018-04-08 22:59:34 +00:00
ds13rtc.c Add pnpinfo to all i2c drivers that have FDT compat data. 2019-05-23 18:24:27 +00:00
ds1307.c Add pnpinfo to all i2c drivers that have FDT compat data. 2019-05-23 18:24:27 +00:00
ds1307reg.h DS1307: Add the mcp7941x enable bit 2017-11-08 01:28:20 +00:00
ds1631.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
ds1672.c Build the ds1672 driver as a module. Add a detach() to unregister the rtc. 2018-03-06 02:30:34 +00:00
ds1775.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
ds3231.c Switch to the new bcd_clocktime conversion routines, and add calls to the 2018-03-05 00:15:56 +00:00
ds3231reg.h
icee.c Rename IICBUS_FDT_PNPINFO -> IICBUS_FDT_PNP_INFO because all the other 2019-05-23 16:03:30 +00:00
if_ic.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
iic_recover_bus.c
iic_recover_bus.h
iic.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
iic.h sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
iicbb_if.m
iicbb.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
iicbus_if.m
iicbus.c revert r273728 and parts of r306589, iicbus no-stop by default feature 2019-05-29 09:08:20 +00:00
iicbus.h Restore the ability for i2c slave devices to do IO from their probe method. 2019-07-08 20:26:56 +00:00
iicoc.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
iicoc.h sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
iiconf.c Restore the ability for i2c slave devices to do IO from their probe method. 2019-07-08 20:26:56 +00:00
iiconf.h Fix a bug introduced with recursive bus ownership support in r321584. 2018-01-23 23:30:19 +00:00
iicsmb.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
isl12xx.c Add pnpinfo to all i2c drivers that have FDT compat data. 2019-05-23 18:24:27 +00:00
lm75.c
max6690.c sys/dev: further adoption of SPDX licensing ID tags. 2017-11-27 14:52:40 +00:00
nxprtc.c Fix nxprtc(4) on systems that support i2c repeat-start correctly. 2019-07-15 21:40:58 +00:00
ofw_iicbus.c Allow i2c hardware drivers to declare their own relationships to ofw_iicbus 2018-02-18 19:33:28 +00:00
rtc8583.c Add pnpinfo to all i2c drivers that have FDT compat data. 2019-05-23 18:24:27 +00:00
s35390a.c Switch to the new bcd_clocktime conversion routines, and add calls to the 2018-03-05 00:43:53 +00:00
sy8106a.c Add pnpinfo to all i2c drivers that have FDT compat data. 2019-05-23 18:24:27 +00:00
syr827.c Add pnpinfo to all i2c drivers that have FDT compat data. 2019-05-23 18:24:27 +00:00