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e0fc62a655
kernel-ark/arch/arm/mach-pxa
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Linus Walleij e0fc62a655 w1: w1-gpio: Convert to use GPIO descriptors 
The w1 master driver includes a complete open drain emulation
reimplementation among other things.

This converts the driver and all board files using it to use
GPIO descriptors associated with the device to look up the
GPIO wire, as well ass the optional pull-up GPIO line.

When probed from the device tree, the driver will just pick
descriptors and use them right off. For the two board files
in the kernel, we add descriptor lookups so we do not need
to keep any old platform data handling around for the GPIO
lines.

As the platform data is also a state container for this driver,
we augment it to contain the GPIO descriptors.

w1_gpio_write_bit_dir() and w1_gpio_write_bit_val() are gone
since this pair was a reimplementation of open drain emulation
which is now handled by gpiolib.

The special "linux,open-drain" flag is a bit of mishap here:
it has the same semantic as the same flags in I2C: it means
that something in the platform is setting up the line as
open drain behind our back. We handle this the same way as
in I2C.

To drive the pull-up, we need to bypass open drain emulation
in gpiolib for the line, and this is done by driving it high
using gpiod_set_raw_value() which has been augmented to have
the semantic of overriding the open drain emulation.

We also augment the documentation to reflect the way to pass
GPIO descriptors from the machine.

Acked-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
2017-12-08 15:32:53 +01:00
..
include/mach License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
am200epd.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
am300epd.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
balloon3.c mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
capc7117.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
cm-x2xx-pci.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
cm-x2xx-pci.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cm-x2xx.c ARM: pxa: cm-x2xx: avoid duplicate macro warnings 2015-12-15 23:50:00 +01:00
cm-x255.c mtd: nand: gpio: Convert to use GPIO descriptors 2017-10-07 11:27:48 +02:00
cm-x270.c rtc: v3020: move rtc-v3020.h to platform_data 2016-07-09 10:24:21 +02:00
cm-x300.c rtc: v3020: move rtc-v3020.h to platform_data 2016-07-09 10:24:21 +02:00
colibri-evalboard.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
colibri-pxa3xx.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
colibri-pxa270-income.c ARM: pxa: Don't rely on public mmc header to include leds.h 2017-02-13 13:20:17 +01:00
colibri-pxa270.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
colibri-pxa300.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
colibri-pxa320.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
colibri.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
corgi_pm.c ARM: pxa: fix GPIO double shifts 2016-09-09 18:07:59 +02:00
corgi.c ARM: pxa: Don't rely on public mmc header to include leds.h 2017-02-13 13:20:17 +01:00
csb701.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
csb726.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
csb726.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
devices.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
devices.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
em-x270.c mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
eseries-irq.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
eseries.c mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
ezx.c ARM: pxa: ezx: fix a910 camera data 2017-01-18 19:12:55 +01:00
generic.c ARM: sa11x0/pxa: get rid of get_clock_tick_rate 2016-10-18 09:12:37 +02:00
generic.h ARM: pxa: remove irq init from dt machines 2016-09-09 18:08:01 +02:00
gumstix.c ARM: pxa: define clock registers as __iomem 2016-02-01 21:43:41 +01:00
gumstix.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
h5000.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
h5000.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
himalaya.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
hx4700.c mfd/gpio: Move HTC GPIO driver to GPIO subsystem 2016-09-28 09:28:34 -07:00
icontrol.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
idp.c ARM: pxa: include linux/leds.h 2017-01-18 19:21:17 +01:00
idp.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
irq.c ARM: kill off set_irq_flags usage 2015-07-28 13:58:13 +02:00
Kconfig ARM: pxa: select both FB and FB_W100 for eseries 2017-07-27 22:57:55 +02:00
littleton.c gpio: max732x: move header file out of I2C realm 2017-05-23 11:33:59 +02:00
littleton.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lpd270.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
lpd270.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
lubbock.c arm: pxa: Convert timers to use timer_setup() 2017-11-02 15:50:35 -07:00
magician.c ARM: pxa: magician: Add support for ADS7846 touchscreen 2017-06-14 08:32:21 +02:00
mainstone.c ARM: pxa: enhance smc91x platform data 2016-10-18 14:14:20 -04:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile.boot
mfp-pxa2xx.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mfp-pxa2xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mfp-pxa3xx.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mfp-pxa3xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mfp-pxa25x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mfp-pxa27x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mfp-pxa300.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mfp-pxa320.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mfp-pxa930.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mioa701_bootresume.S ARM: align .data section 2017-08-14 16:22:55 +01:00
mioa701.c ARM: pxa: mioa701: use the new pxa_camera platform_data 2016-10-29 14:05:18 +02:00
mioa701.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mp900.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mxm8x10.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
mxm8x10.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
palm27x.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palm27x.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmld.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmt5.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmt5.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmtc.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmte2.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmte2.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmtreo.c ARM: SoC multiplatform code changes for v4.5 2016-01-20 18:03:56 -08:00
palmtreo.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
palmtx.c mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
palmz72.c i2c: gpio: Augment all boardfiles to use open drain 2017-10-30 08:42:43 +01:00
palmz72.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pcm027.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pcm027.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pcm990_baseboard.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pcm990-baseboard.c ARM: SoC multiplatform code changes for v4.5 2016-01-20 18:03:56 -08:00
pm.c ARM: pxa: Delete an error message for a failed memory allocation in pxa_pm_init() 2017-06-14 08:32:21 +02:00
pm.h ARM: pxa: move extern declarations to pm.h 2016-02-01 21:44:27 +01:00
poodle.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pxa2xx.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pxa3xx-ulpi.c ARM: pxa: Delete an error message for a failed memory allocation in pxa3xx_u2d_probe() 2017-06-14 08:32:21 +02:00
pxa3xx.c ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
pxa3xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa25x.c ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
pxa25x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa27x-udc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa27x.c ARM: 8641/1: treewide: Replace uses of virt_to_phys with __pa_symbol 2017-02-28 11:06:10 +00:00
pxa27x.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa300.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pxa300.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa320.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pxa320.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa930.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
pxa930.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
pxa_cplds_irqs.c ARM: pxa: pxa_cplds: honor probe deferral 2016-10-18 09:12:37 +02:00
pxa-dt.c ARM: pxa: remove irq init from dt machines 2016-09-09 18:08:01 +02:00
raumfeld.c w1: w1-gpio: Convert to use GPIO descriptors 2017-12-08 15:32:53 +01:00
regs-rtc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
regs-u2d.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
reset.c ARM: pxa: prevent PXA270 occasional reboot freezes 2013-12-11 16:35:16 -08:00
saar.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
sharpsl_pm.c arm: pxa: Convert timers to use timer_setup() 2017-11-02 15:50:35 -07:00
sharpsl_pm.h ARM: pxa: fix GPIO double shifts 2016-09-09 18:07:59 +02:00
sleep.S ARM: pxa: correct errata number for PXA270 2014-07-04 20:30:42 +08:00
smemc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
spitz_pm.c ARM: pxa: fix GPIO double shifts 2016-09-09 18:07:59 +02:00
spitz.c ARM: pxa: remove duplicated include from spitz.c 2016-11-02 22:44:51 +01:00
standby.S ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+ 2014-07-18 12:29:04 +01:00
stargate2.c hwmon: (sht15) Root out platform data 2017-10-29 18:36:03 -07:00
tavorevb.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
tosa_bt.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
tosa-bt.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
tosa.c mtd: nand: Rename nand.h into rawnand.h 2017-08-13 10:11:49 +02:00
trizeps4.c ARM: pxa: Don't rely on public mmc header to include leds.h 2017-02-13 13:20:17 +01:00
udc.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
viper.c i2c: gpio: Augment all boardfiles to use open drain 2017-10-30 08:42:43 +01:00
viper.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
vpac270.c ARM: pxa: Don't rely on public mmc header to include leds.h 2017-02-13 13:20:17 +01:00
xcep.c net: smc91x: fix SMC accesses 2016-08-28 23:44:55 -04:00
z2.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
zeus.c ARM: pxa: Don't rely on public mmc header to include leds.h 2017-02-13 13:20:17 +01:00
zeus.h ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
zylonite_pxa300.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
zylonite_pxa320.c ARM: pxa: make more mach/*.h files local 2015-12-01 21:52:50 +01:00
zylonite.c ARM: pxa: Don't rely on public mmc header to include leds.h 2017-02-13 13:20:17 +01:00
zylonite.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00