CVS log for src/sys/dev/gpio/gpio.c

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Default branch: MAIN

gpio(4): Add gpio_intr_{mask,unmask} functions.

For devices that use level triggered GPIO interrupts, provide an API
that allows them to mask/unmask interrupts on that pin.

Pull up following revision(s) (requested by brad in ticket #461):
	sys/dev/gpio/gpiovar.h: revision 1.19
	share/man/man4/gpioirq.4: revision 1.4 via patch
	sys/dev/gpio/gpio.c: revision 1.73
	etc/MAKEDEV.tmpl: revision 1.234
	sys/conf/majors: revision 1.103
	sys/dev/gpio/gpioirq.c: revision 1.2
gpioirq(4) version 2
This update makes this driver more than just an example and allows for:
o More than one pin to be attached to a gpioirq instance.  That is,
  the mask parameter can be greater than 0x01 now.
o A /dev/gpioirqN device that allows GPIO pin interrupts to be
  transported into userland.  This is a device that can be opened for
  reading with a simple fixed output indicating the device unit, pin
  number and current pin state.
This update was used as part of a physical intrusion detection system
where multiple switches (i.e. window magnetic reed switches and etc.)
are tied to a bunch of GPIO inputs with userland software that reacts
to the pins changing state.

gpioirq(4) version 2

This update makes this driver more than just an example and allows for:

o More than one pin to be attached to a gpioirq instance.  That is,
  the mask parameter can be greater than 0x01 now.

o A /dev/gpioirqN device that allows GPIO pin interrupts to be
  transported into userland.  This is a device that can be opened for
  reading with a simple fixed output indicating the device unit, pin
  number and current pin state.


This update was used as part of a physical intrusion detection system
where multiple switches (i.e. window magnetic reed switches and etc.)
are tied to a bunch of GPIO inputs with userland software that reacts
to the pins changing state.

Never fib about pin count in GPIOINFO ioctl results.  The number of pins
on a controller simply does not change depending on the privileges of
the caller.

I have been using this for a while and forgot to commit it.  This add
a number of KERNEL_LOCK() calls and at the very least prevents gpioiic
from panicing the system.  This may be a fix for kern/56438.

For device modules that provide both auto-config and /dev/xxx
interfaces, make sure that initialization and destruction
follow the proper sequence.  This is triggered by the recent
changes to the devsw stuff; per riastradh@ the required call
sequence is:

	devsw_attach()
	config_init_component() or config_cf*_attach()
	...
	config_fini_component() or config_cf*_detach()
	devsw_detach()

While here, add a few missing calls to some of the detach
routines.

Testing of these changes has been limited to:
	1. compile without build break
	2. no related test failures from atf
	3. modload/modunload work as well as
	   before.

No functional device testing done, since I don't have any
of these devices.  Let me know of any damage I might cause
here!

XXX Some of the modules affected by this commit are already
XXX broken;  see kern/56772.  This commit does not break
any additional modules (as far as I know).

When initializing pins, try to get the default pin name from the
"gpio-line-names" property.  If not present, then fall back on the
default name for the pin from the parent, if there is one.

use l->l_cred since it is available.

fix various typos in compatibility, mainly in comments.

Merge thorpej-cfargs2.

Adapt to CFARGS().

Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
  actually needed.
- Don't be explicit about what interface attribute is attaching if
  the device only has one.  (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
  situations, making is visibly easier to see when indirect config is
  in play, and allowing for future change in semantics.  (As of now,
  this is just a wrapper around config_match(), but that is an
  implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance.  This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

Treat config_probe() as if it were a boolean function; don't compare
return value > 0... except for the odd balls, which are now really easy
to spot.

config_match() -> config_probe() for the straight-forward indirect config
cases.  There are still a few odd balls using config_match() which should
be sorted out later.

CFARG_SUBMATCH -> CFARG_SEARCH for the indirect configuration uses.

config_attach_loc() -> config_attach() with CFARG_LOCATORS argument.

Give config_attach() the tagged variadic argument treatment and
mechanically convert all call sites.

No need to pass interface attribute or locators to config_search().

Remove a now-unused variable.

CFARG_IATTR usage audit:

If a device carries only one interface attribute, there is no need
to specify it when calling config_search(); that specification is
meant only to disambiguate which interface attribute (which is a
proxy for "what kind of attach args are being used") is having
children attached.  cfparent_match() will take care of ensuring that
any potential children can attach to one of the parent's iterface
attributes, and if the parent only carries one, no disambiguation is
necessary.

No need to pass the parent softc down to the indirect submatch routine;
it's available from the parent device_t there.

The proliferation if config_search_*() and config_found_*() combinations
is a little absurd, so begin to tidy this up:

- Introduce a new cfarg_t enumerated type, that defines the types of
  tag-value variadic arguments that can be passed to the various
  config_*() functions (CFARG_SUBMATCH, CFARG_IATTR, and CFARG_LOCATORS,
  for now, plus a CFARG_EOL sentinel).
- Collapse config_search_*() into config_search() that takes these
  variadic arguments.
- Convert all call sites of config_search_*() to the new signature.
  Noticed several incorrect usages along the way, which will be
  audited in a future commit.

Mostly merge changes from HEAD upto 20200411

gpio: make GPIOREAD return also the symbolic name of the pin, if it is set

convert more KM_NOSLEEP to KM_SLEEP and remove code to handle failures.

Sync with HEAD

Merge the [pgoyette-compat] branch

Sync with HEAD

Overhaul of GPIO interrupt support (that wasn't even used by anything).
- Remove the old, not-expressive-enough interrupt flags, and replace them
  with a new set of interrupt-specific flags that can express a wide
  variety of interrupt configurations (pos, neg, and double-edge, high
  and low level).
- Remove old, unused gpio_pin_ctl_intr() and gpio_pin_irqen(), and
  replace them with gpio_intr_establish(), gpio_intr_disestablish(),
  and gpio_intr_str().  Corresponding fields in the gpio_chipset_tag
  are also added for back-end controllers, which now handle the actual
  dispatch of GPIO interrupts in order to properly support level-triggered
  interrupts as well as interoperate properly with FDT-registered
  interrupts.

Piggy-back on the 8.99.18 version bump.

Inspired by initial work from Brad Spencer.
PR kern/51676

update from HEAD

Kill some more extern struct cfdriver declarations.

Down with externs in .c!

Sync with HEAD

Pull up following revision(s) (requested by jmcneill in ticket #114):
	sys/arch/arm/samsung/exynos_intr.h: revision 1.3
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.1
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.2
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.3
	sys/arch/arm/sunxi/sunxi_gates.c: revision 1.1
	distrib/utils/embedded/mkimage: revision 1.66
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.4
	sys/arch/arm/sunxi/sunxi_rsb.c: revision 1.1
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.5
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.6
	sys/arch/arm/sunxi/sun8i_h3_ccu.c: revision 1.7
	sys/dev/gpio/gpio.c: revision 1.59
	sys/arch/arm/sunxi/sunxi_ccu_prediv.c: revision 1.1
	sys/conf/Makefile.kern.inc: revision 1.257
	sys/arch/evbarm/conf/ODROID-XU_INSTALL: file removal
	sys/arch/arm/sunxi/sunxi_ccu_prediv.c: revision 1.2
	sys/conf/Makefile.kern.inc: revision 1.258
	sys/arch/arm/fdt/psci_fdt.h: revision 1.1
	sys/arch/arm/sunxi/sunxi_resets.c: revision 1.1
	sys/arch/evbarm/conf/files.sunxi: revision 1.1
	sys/arch/evbarm/fdt/fdt_machdep.c: revision 1.8
	sys/arch/evbarm/fdt/fdt_machdep.c: revision 1.9
	sys/arch/arm/samsung/files.exynos: revision 1.22
	distrib/utils/embedded/conf/armv7.conf: revision 1.13
	sys/arch/arm/samsung/files.exynos: revision 1.23
	sys/arch/evbarm/conf/std.tegra: revision 1.15
	distrib/utils/embedded/conf/armv7.conf: revision 1.14
	sys/arch/arm/samsung/files.exynos: revision 1.24
	distrib/utils/embedded/conf/armv7.conf: revision 1.15
	sys/arch/evbarm/sunxi/genassym.cf: revision 1.1
	sys/arch/arm/samsung/exynos_fdt.c: file removal
	sys/dev/fdt/fdt_pinctrl.c: revision 1.4
	sys/arch/arm/samsung/exynos_sysmmu.c: revision 1.2
	sys/arch/arm/sunxi/sun8i_h3_gpio.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_twi.c: revision 1.1
	sys/dev/usb/ehci.c: revision 1.255
	sys/arch/arm/sunxi/sunxi_twi.c: revision 1.2
	sys/arch/arm/sunxi/sun8i_a83t_ccu.h: revision 1.1
	sys/dev/ic/dwc_mmc.c: revision 1.11
	sys/arch/arm/cortex/gic.c: revision 1.24
	distrib/evbarm/instkernel/ramdisk/Makefile: revision 1.17
	etc/etc.evbarm/Makefile.inc: revision 1.87
	etc/etc.evbarm/Makefile.inc: revision 1.88
	sys/arch/arm/fdt/gic_fdt.c: revision 1.5
	etc/Makefile: revision 1.429
	sys/arch/arm/fdt/gic_fdt.c: revision 1.6
	sys/arch/arm/fdt/gic_fdt.c: revision 1.7
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.2
	sys/arch/evbarm/conf/std.sunxi: revision 1.1
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.3
	sys/arch/evbarm/conf/std.sunxi: revision 1.2
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.4
	sys/arch/evbarm/conf/std.sunxi: revision 1.3
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.5
	sys/arch/arm/sunxi/sunxi_ccu_div.c: revision 1.1
	sys/dev/gpio/gpiovar.h: revision 1.17
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.6
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.7
	sys/arch/arm/sunxi/sunxi_gpio.c: revision 1.8
	sys/arch/arm/sunxi/sunxi_rsb.h: revision 1.1
	sys/arch/arm/samsung/exynos_i2c.c: revision 1.12
	sys/dev/fdt/fdtvar.h: revision 1.21
	sys/arch/evbarm/sunxi/sunxi_start.S: revision 1.1
	sys/arch/arm/samsung/exynos_i2c.c: revision 1.13
	sys/dev/fdt/fdtvar.h: revision 1.22
	sys/arch/evbarm/conf/SUNXI: revision 1.10
	sys/dev/fdt/fdtvar.h: revision 1.23
	sys/arch/evbarm/conf/SUNXI: revision 1.11
	sys/dev/fdt/gpioleds.c: revision 1.1
	sys/dev/fdt/fdtvar.h: revision 1.24
	sys/arch/evbarm/conf/SUNXI: revision 1.12
	sys/arch/evbarm/conf/SUNXI: revision 1.13
	sys/arch/arm/cortex/gic.c: revision 1.30
	sys/arch/evbarm/conf/SUNXI: revision 1.14
	sys/arch/evbarm/conf/SUNXI: revision 1.15
	sys/arch/evbarm/conf/SUNXI: revision 1.16
	sys/arch/arm/sunxi/sunxi_emac.c: revision 1.1
	etc/Makefile: revision 1.430
	sys/arch/arm/sunxi/sunxi_emac.c: revision 1.2
	etc/Makefile: revision 1.431
	sys/arch/evbarm/conf/VEXPRESS_A15: revision 1.17
	sys/arch/arm/sunxi/sunxi_emac.c: revision 1.3
	sys/arch/arm/sunxi/sunxi_emac.c: revision 1.4
	sys/arch/arm/samsung/exynos5422_clock.c: revision 1.6
	sys/arch/arm/samsung/exynos_platform.c: revision 1.1
	sys/dev/ofw/ofw_subr.c: revision 1.29
	sys/arch/arm/samsung/exynos_platform.c: revision 1.2
	sys/arch/evbarm/conf/mk.vexpress: revision 1.3
	sys/arch/arm/samsung/exynos_platform.c: revision 1.3
	sys/arch/evbarm/conf/mk.vexpress: revision 1.4
	sys/arch/arm/samsung/exynos_platform.c: revision 1.4
	sys/arch/arm/arm/psci.h: revision 1.1
	sys/arch/arm/samsung/exynos_platform.c: revision 1.5
	sys/arch/arm/samsung/exynos_platform.c: revision 1.6
	sys/arch/evbarm/fdt/fdt_machdep.c: revision 1.10
	external/bsd/mdocml/bin/mandoc/Makefile: revision 1.12
	sys/dev/fdt/files.fdt: revision 1.17
	sys/dev/fdt/files.fdt: revision 1.18
	sys/dev/fdt/files.fdt: revision 1.19
	sys/arch/arm/samsung/exynos_sscom.c: revision 1.8
	sys/arch/arm/sunxi/sun8i_a83t_ccu.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_mmc.c: revision 1.1
	sys/arch/arm/samsung/exynos_sscom.c: revision 1.9
	sys/arch/arm/conf/files.arm: revision 1.133
	sys/arch/arm/samsung/mct_var.h: revision 1.5
	sys/arch/arm/sunxi/sunxi_platform.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_platform.c: revision 1.2
	sys/arch/evbarm/conf/std.vexpress: revision 1.6
	sys/arch/arm/sunxi/sunxi_platform.c: revision 1.3
	sys/arch/arm/sunxi/sun6i_a31_gpio.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_platform.c: revision 1.4
	sys/arch/arm/sunxi/sun6i_a31_gpio.c: revision 1.2
	sys/arch/arm/sunxi/files.sunxi: revision 1.1
	sys/dev/ofw/ofw_subr.c: revision 1.30
	sys/arch/arm/sunxi/files.sunxi: revision 1.2
	sys/dev/ofw/openfirm.h: revision 1.35
	sys/arch/arm/sunxi/files.sunxi: revision 1.3
	sys/dev/ofw/openfirm.h: revision 1.36
	sys/arch/arm/sunxi/files.sunxi: revision 1.4
	sys/arch/arm/sunxi/files.sunxi: revision 1.5
	sys/arch/evbarm/exynos/exynos_machdep.c: file removal
	sys/arch/arm/sunxi/sunxi_gpio.h: revision 1.1
	sys/arch/arm/samsung/sscom.c: revision 1.9
	sys/arch/arm/sunxi/files.sunxi: revision 1.6
	sys/dev/fdt/ohci_fdt.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_usbphy.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_gpio.h: revision 1.2
	sys/arch/arm/sunxi/files.sunxi: revision 1.7
	sys/arch/arm/sunxi/sunxi_usbphy.c: revision 1.2
	sys/arch/arm/sunxi/sunxi_gpio.h: revision 1.3
	sys/arch/arm/sunxi/files.sunxi: revision 1.8
	sys/arch/arm/sunxi/sunxi_usbphy.c: revision 1.3
	sys/arch/arm/sunxi/files.sunxi: revision 1.9
	sys/arch/arm/samsung/exynos_sscom.c: revision 1.10
	sys/arch/evbarm/conf/mk.tegra: revision 1.5
	sys/arch/arm/samsung/exynos_dwcmmc.c: revision 1.4
	sys/arch/evbarm/conf/mk.tegra: revision 1.6
	sys/arch/evbarm/conf/EXYNOS: revision 1.15
	sys/arch/evbarm/conf/EXYNOS: revision 1.16
	sys/arch/evbarm/conf/EXYNOS: revision 1.17
	sys/arch/arm/sunxi/sunxi_ccu.c: revision 1.1
	sys/arch/evbarm/conf/EXYNOS: revision 1.19
	sys/arch/arm/sunxi/sunxi_ccu.c: revision 1.2
	sys/arch/arm/sunxi/sunxi_ccu.c: revision 1.3
	sys/arch/arm/sunxi/sunxi_ccu.c: revision 1.4
	sys/arch/arm/sunxi/sunxi_ccu.c: revision 1.5
	sys/arch/arm/sunxi/sunxi_emac.h: revision 1.1
	sys/arch/evbarm/conf/mk.sunxi: revision 1.1
	sys/arch/evbarm/include/bootconfig.h: revision 1.7
	sys/arch/evbarm/conf/TEGRA: revision 1.24
	sys/arch/arm/arm/psci.c: revision 1.1
	sys/dev/led.c: revision 1.1
	sys/dev/led.c: revision 1.2
	sys/arch/arm/arm/psci_arm.S: revision 1.1
	sys/arch/arm/sunxi/sunxi_ccu_gate.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_ccu_gate.c: revision 1.2
	sys/dev/fdt/ehci_fdt.c: revision 1.1
	sys/dev/fdt/ehci_fdt.c: revision 1.2
	sys/arch/arm/sunxi/sun6i_a31_ccu.h: revision 1.1
	sys/arch/evbarm/conf/EXYNOS: revision 1.21
	sys/arch/arm/sunxi/files.sunxi: revision 1.10
	sys/arch/arm/sunxi/files.sunxi: revision 1.11
	sys/dev/fdt/fdtbus.c: revision 1.14
	sys/arch/arm/sunxi/sunxi_mmc.h: revision 1.1
	sys/arch/arm/samsung/exynos5422_dma.c: file removal
	usr.bin/config/mkmakefile.c: revision 1.69
	sys/conf/files: revision 1.1178
	sys/arch/arm/sunxi/sunxi_platform.h: revision 1.1
	sys/arch/evbarm/exynos/exynos_start.S: revision 1.4
	sys/arch/arm/samsung/exynos_pinctrl.c: revision 1.11
	sys/arch/arm/samsung/exynos_pinctrl.c: revision 1.12
	sys/arch/arm/sunxi/sunxi_rtc.c: revision 1.1
	sys/arch/arm/sunxi/sun8i_h3_ccu.h: revision 1.1
	sys/arch/arm/samsung/exynos5410_clock.c: revision 1.1
	sys/arch/arm/samsung/exynos5410_clock.c: revision 1.2
	sys/arch/evbarm/conf/SUNXI: revision 1.1
	external/bsd/elftosb/usr.sbin/elftosb/Makefile: revision 1.5
	sys/arch/evbarm/conf/SUNXI: revision 1.2
	sys/arch/arm/fdt/psci_fdt.c: revision 1.1
	sys/arch/evbarm/conf/SUNXI: revision 1.3
	sys/arch/evbarm/conf/SUNXI: revision 1.4
	sys/arch/evbarm/conf/files.exynos: revision 1.3
	sys/arch/evbarm/conf/SUNXI: revision 1.5
	sys/arch/evbarm/conf/SUNXI: revision 1.6
	sys/arch/arm/sunxi/sunxi_ccu_nm.c: revision 1.1
	sys/dev/fdt/fixedfactorclock.c: revision 1.1
	sys/dev/fdt/fdt_subr.c: revision 1.14
	sys/arch/evbarm/conf/SUNXI: revision 1.7
	sys/arch/arm/sunxi/sunxi_ccu_nm.c: revision 1.2
	sys/arch/arm/sunxi/sun8i_a83t_gpio.c: revision 1.1
	sys/dev/fdt/fdt_subr.c: revision 1.15
	sys/arch/evbarm/conf/SUNXI: revision 1.8
	sys/arch/arm/sunxi/sunxi_ccu_nm.c: revision 1.3
	sys/dev/ic/dwc_mmc_reg.h: revision 1.6
	sys/dev/fdt/fdt_subr.c: revision 1.16
	sys/arch/evbarm/conf/SUNXI: revision 1.9
	usr.bin/config/mkmakefile.c: revision 1.70
	sys/dev/fdt/fdt_phy.c: revision 1.1
	sys/arch/evbarm/conf/ODROID-XU: file removal
	sys/arch/arm/fdt/arm_fdt.c: revision 1.4
	sys/arch/arm/samsung/exynos_reg.h: revision 1.14
	sys/conf/files: revision 1.1180
	sys/arch/arm/samsung/exynos_reg.h: revision 1.15
	sys/arch/arm/sunxi/sunxi_ccu.h: revision 1.1
	sys/arch/arm/sunxi/sunxi_ccu.h: revision 1.2
	sys/arch/arm/sunxi/sunxi_ccu.h: revision 1.3
	sys/arch/arm/sunxi/sunxi_ccu.h: revision 1.4
	sys/arch/arm/sunxi/sunxi_ccu.h: revision 1.5
	sys/arch/arm/sunxi/sunxi_ccu.h: revision 1.6
	sys/dev/ic/dwc_mmc_var.h: revision 1.6
	sys/arch/arm/samsung/exynos_combiner.c: revision 1.7
	sys/arch/evbarm/exynos/platform.h: revision 1.2
	sys/arch/arm/fdt/files.fdt: revision 1.12
	sys/arch/evbarm/conf/std.exynos: revision 1.2
	sys/arch/evbarm/conf/std.exynos: revision 1.3
	sys/arch/arm/rockchip/rockchip_dwcmmc.c: revision 1.6
	sys/arch/arm/sunxi/sunxi_com.c: revision 1.1
	sys/dev/led.h: revision 1.1
	sys/arch/evbarm/conf/std.exynos: revision 1.5
	sys/arch/arm/sunxi/sunxi_com.c: revision 1.2
	sys/arch/evbarm/conf/files.evbarm: revision 1.26
	usr.bin/config/defs.h: revision 1.99
	sys/arch/arm/fdt/arm_fdtvar.h: revision 1.6
	sys/arch/arm/samsung/exynos_soc.c: revision 1.32
	sys/arch/arm/sunxi/sun6i_a31_ccu.c: revision 1.1
	sys/arch/arm/sunxi/sun6i_a31_ccu.c: revision 1.2
	sys/arch/arm/samsung/mct.c: revision 1.11
	sys/arch/evbarm/conf/ODROID-U: file removal
	sys/arch/arm/samsung/mct.c: revision 1.12
	sys/arch/arm/sunxi/sunxi_ccu_nkmp.c: revision 1.1
	sys/arch/arm/sunxi/sunxi_ccu_nkmp.c: revision 1.2
	sys/arch/arm/sunxi/sunxi_ccu_nkmp.c: revision 1.3
	sys/arch/arm/sunxi/sunxi_ccu_nkmp.c: revision 1.4
Get the EXYNOS kernel building again with recent FDT changes. Untested.
Use arm_fdt_cpu_hatch and add mmu entry for DTB
Fix exynos5 devmap, bootstrap, and implement early_putchar.
Calculate UART frequency based on bootloader config.
Fix KERNEL_BASE_PHYS (how did this ever work?)
Avoid divide-by-zero for unconfigured PLLs
Correctly initialize i2cbus attach args.
Add delay and enable mct timecounter.
Fix build w/o VERBOSE_INIT_ARM
Remove ODROID-U and ODROID-XU kernel configs as they no longer work.
- Replace CONSADDR with SSCOM2CONSOLE in example
- Remove gtmr (Exynos5422 uses mct)
- cinclude EXYNOS.local instead of TEGRA.local
Use fdtbus_intr_establish to hook in block interrupts instead of
intr_establish.
Simplify MCT; just enable it and then attach an ARMv7 generic timer.
Add support for building DTB files during kernel build, from christos.
build vexpress-v2p-ca15-tc1.dtb with the kernel
build tegra124-apalis-eval.dtb, tegra124-jetson-tk1.dtb, tegra124-nyan-big.dtb, tegra124-nyan-blaze.dtb, and tegra124-venice2.dtb with the kernel
Allow multiline makeoptions to work by quoting the newline..
Bump for quoting makeoptions with multiple lines.
un-c99
bump required config version for multiline makeoptions feature
Set DTS makeoption in kernel config
Assign DTB files to a variable so we can make -V DTB
put the dtb files with their kernels.
no need for debug printing.
Don't assume that CPU index = GIC CPU interface number. We can determine
the current CPU interface number by reading from the read-only
GICD_ITARGETSR0 through GICD_ITARGETSR7 registers.
This gets interrupts working on Exynos 5422, where the boot processor has
GIC CPU interface #4.
use -v to get the expanded variable.
Use -v to get the expanded variables.
Get baud rate from sclk_uartN instead of uartN. Print IRQ number at attach.
Fix PLL con0 register locations and add uart clocks
Disable exyortc for now, it doesn't work.
More or less a rewrite of dwc_mmc, based on awin_mmc, adding DMA support.
Update for new dwc_mmc driver
Fix dmesg
Add Exynos 5410 clock controller driver.
Fix a few typos in clock parent names for mmc clocks.
From jmcneill@
Update for new dwc_mmc driver
Implement platform reset for exynos5
Attach fdtbus to a /clocks node with no compatible string.
Add support for ARM Power State Coordination Interface (PSCI).
Support interrupt sharing.
Add initial support for Allwinner H3 SoC.
ARM Trusted Firmware reserves SGIs 8-15 for secure use. Even without ATF,
U-Boot on some platforms may use SGIs in this range for the PSCI
implementation.
Change ARMGIC_IPI_BASE to 0 from (16 - NIPI) and add a compile-time assert
to ensure that we don't end up with a conflict.
Add H3 MMC support
SD/MMC clock fixes
Add FDT PHY interface.
Add glue for generic ehci/ohci bindings.
Rename a variable, NFC.
Support parents in different clock domains.
Add USB stuff. Doesn't quite work yet.
Synopsys DesignWare APB UART needs "options COM_AWIN" for now.
Add i2c glue.
Add RTC driver.
PHY registers start at index 1. Now USB works.
Don't allow sharing edge and level triggered interrupts.
Add arm_fdt_memory_dump helper for dumping physical addresses from ddb
Print clocks with aprint_debug
Remove unused defines
Add fdtbus_get_string helper
Add of_search_compatible, which searches an array of compat_data structures
for a matching "compatible" entry matching the supplied OFW node. This
allows us to associate data with compatible strings.
Add driver for Allwinner Gigabit Ethernet (EMAC) as found in sun8i and
later family SoCs.
This is a port of my FreeBSD driver which has been confirmed to work on
Allwinner H3, A83T, and A64 SoCs.
Fix dmesg
Add basic support for Allwinner A31.
Add basic FDT GPIO support.
Fix the pinctrl api to match the spec. A pinctrl config can have more
than one xref, and an xref may have specifier data associated with it.
Enable sunxi pinctrl support
Adjust to new pinctrl API
Add P2WI/RSB driver, based on awin_p2wi.c.
Fix typo in a compat string.
Configure pin defaults at attach
No need to explicitly set pinctrl config 0 now
Fix some register definitions.
Disallow sharing between MPSAFE and non-MPSAFE handlers.
Add of_match_compat_data.
This routine searches an array of compat_data structures for a
matching "compatible" entry matching the supplied OFW node.
Add options __HAVE_CPU_UAREA_ALLOC_IDLELWP
Add support for reserved memory and MEMORY_DISK_DYNAMIC for FDT-based
kernels.
the extent code cannot use the full range of u_long,
so ignore the last page before 4GB too.  ok jmcneill@
Copy install ramdisk to releasedir. Provide both a raw ffs and
Legacy U-Boot version of it.
Replace HUMMINGBIRD_A31 with SUNXI kernel on armv7.img and include .dtb
files for SUNXI and TEGRA kernels on the MSDOS partition.
Let the controller provide a default name for pins. This makes pins easier
to locate when we have multiple banks and a variable number of pins per
bank.
Attach gpio(4) to sunxigpio
Test for kernel build directory before reading DTB list
Add support for Allwinner A83T SoC.
Add A83T files
Fixup busdma sync and locking in the RX path. Disable batch RX/TX ints.
Fix AHB2 register definition and explicitly set AHB2 parent to PLL_PERIPH0/2 -- this gives us 50% more bus bandwidth for emac
Restore TX_INTERVAL_DEFAULT to 64
Drop the sunxi_emac_rx_batch feature. It was originally designed to
reduce the amount of mutex unlock/lock cycles during the RX path on
FreeBSD and if_input, but it is not required to drop the lock before
calling if_percpuq_enqueue on NetBSD.
Write back the data value instead of mask in sunxi_gpio_write
Add a helper for exposing LED controls via sysctl.
Add GPIO LED driver.
add gpioleds
Add misc. gates and resets driver, and explicitly enable PIO clocks
at attach.
Add fdtbus_get_string_index helper.
Add driver for fixed-factor clocks.
Add ffclock
Remove the requirement for ehci to attach after companion devices.
"go for it" - skrll@
Remove the hack to find companion devices and just assume 1 companion if
ETTF flag is not set.
Remove pass numbers for ehci/ohci now that the attach order no longer matters
Use unsigned char for ctype functions, suggested by christos
Add : to body of populate_sunxi to appease bash.
port-evbarm/52388: Fix number of args to a debug printf.

Let the controller provide a default name for pins. This makes pins easier
to locate when we have multiple banks and a variable number of pins per
bank.

Revise previous.  Rather than explicitly including <sys/localcount.h>
in all the places where {b,c}devsw is initialized, just include it
from <sys/conf.h>.  This avoids an include-sequence dependancy.

Add DEVSW_MODULE_INIT to existing device-driver modules, so that they
willl have a localcount defined and thus be permitted to load.  Without
a localcount, loading the module will return EINVAL.

XXX the dtrace and drm stuff might need to be fed back upstream?

Sync with HEAD

As proposed in
http://mail-index.netbsd.org/tech-kern/2016/04/28/msg020504.html
add gpio interrupt support to the gpio framework, and an implementation
for the allwinner gpio backend (tested on A20 only).
gpio(4) has new public functions:
- gpio_intr() called by backends when an interrupt condition for
  a gpio pin is present
- gpio_find_device() and gpio_get_name(), support functions for
  gpio(4) users, wich respectively returns a void * cookie for a gpio device
  given its name, and returns the name given the cookie.
- gpio_pin_ctl_intr(), which is used to configure interrupts on a gpio pin and
  registers a callback.
- gpio_pin_irqen(), which is used to mask/unmask interrupts on a pin.

Nothing in the NetBSD tree uses this yet, but I have a i2c driver
(at https://github.com/mbouyer/marine_chartplotter/tree/master/software/NetBSD/driver) which uses it.

Rebase to HEAD as of a few days ago.

Rebase.

Add d_discard to all struct cdevsw instances I could find.

All have been set to "nodiscard"; some should get a real implementation.

make implementation match gpio(4) man entry. do no change configuration
if no flags are being set (allows non-destructive inquiry via GPIOSET again).

Add aprint_naive("\n") for boot -q

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

PR/48701: Timo Buhrmester: spurious messages while booting silently (gpio,
glxsb); use aprint_normal()
>Category:       kern
>Synopsis:       spurious messages while booting silently (gpio, glxsb)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net

Change (mostly mechanically) every cdevsw/bdevsw I can find to use
designated initializers.

I have not built every extant kernel so I have probably broken at
least one build; however I've also found and fixed some wrong
cdevsw/bdevsw entries so even if so I think we come out ahead.

resync from head

When returning the old value, use the value read from the device.

Added a locator for interrupts on the GPIO bus. This allows ARM devices
(like the Nokia N900) to register interrupt handlers as specified within
their respective kernel configuration file.

XXX This change is not adequate because intr_establish() is a MD interface,
    so it will have to be re-designed before merging to the main tree.

Resync to 2012-11-19 00:00:00 UTC

sync with head

Quiet down autoconfiguration by changing some printf() calls to
aprint_normal() calls.

sync with head

Don't ignore the gpiobus_close() return value.  Found by joerg@ using clang.

Initialize ga.ga_dvname in gpio_search to prevent a stack fault in config_match

Remove an unused variable.

Remove software pulsing in gpio(4), this functionality is now provided
by the gpiopwm(4) driver.

Fix non-COMPAT_50 compilation.

Unbreak and move the list of child devices to COMPAT_50.

Remove the GPIODETACH gpio(4) ioctl (it is still available in COMPAT_50) and
the 'detach' command line option from gpioctl(8).  Drivers that are
attached to gpio pins can be detached using the drvctl(8) command.

Don't cast void pointers.

Add a ga_flags field to the gpio_attach structure to hand driver
specific flags to drivers being attached at gpio pins.  gpioiic(4)
uses this to reverse the SDA/SCL signal order.  gpioctl(8) accepts
the flag values as optional argument to the attach command.
While here, make sure we retain backwards compatability and wrap compat
code in #ifdef COMPAT_50/#endif.

Make sure error is not used unitialized when sc->sc_attach_busy is 0.

Remove what I committed accidentally...

gpio(4) keeps track of child devices attached using the GPIOATTACH ioctl(),
so remove those references and free the memory in gpio_childdetached().
Protect access to the list of child devices with a kcondvar.

Unconditionally include <sys/modules.h>.

Register as built-in module when compiled wo/ _MODULE.

Add a new ioctl, GPIOPULSE to gpio(4) to allow for pulsing a pin.
If a pin can pulse in hardware, that will be used, else it will
be pulsed in software.  There is no way yet to set the pulse frequency
for pins that pulse in hardware.  While here, make the code mpsafe and
allow more than one thread in the driver (access to ioctl is serialized).

gpio(4) and gpiosim(4) can now be built and used as modules.  While here,
make some functions static.

Catchup with rmind-uvmplock merge.

sync with head

Annotate that gpiobus_close's return value is undesired here

sync with head.

sync with head

Sync with HEAD.

console spam

sync with head

A pointer typedef entails trading too much flexibility to declare const
and non-const types, and the kernel uses both const and non-const
PMF qualifiers and device suspensors, so change the pmf_qual_t and
device_suspensor_t typedefs from "pointers to const" to non-pointer,
non-const types.

Unfold, bump copyright.

Expand PMF_FN_* macros.

Delete the useless activation hook.  Add a child-detached hook and
a rescan hook.  Detach children before detaching self.

sync with head

Prevent the creation of duplicate pin names in GPIOSET.
Problem noticed by rmind a while ago.

Before trying to attach a child device driver, make sure the GPIO pins can
be mapped.  This prevents drivers from later failing in the attach routine.
Problem found by me, solution suggested by jmcneill.

sync with head.

unfold short lines, fold long line.

Fold long line.

Be more careful when attaching drivers at runtime, call the drivers match
routine before attaching the device.  Prevents non-working driver instances
from being created.

Fold long line, add comment to fix possible creation of duplicates.

use device_xname

make this build w/ GPIO_DEBUG

Change one more struct device * to device_t, noticed by cegger.

Rework the GPIO framework.  Tie it to the kauth(9) framework to control
access to the GPIO pins.  Device drivers using GPIO pins can now be
attached and detached at runtime.  GPIO pins can be named for easier
reference from userland programs.  Introduce a new gpiosim(4) driver,
which is used for development.

Reviewed by many.

Sync with HEAD.

Commit is split, to avoid a "too many arguments" protocol error.

sync with head.

Sync with HEAD.

During shutdown, detach devices in an orderly fashion.

Call the detach routine for every device in the device tree, starting
with the leaves and moving toward the root, expecting that each
(pseudo-)device driver will use the opportunity to gracefully commit
outstandings transactions to the underlying (pseudo-)device and to
relinquish control of the hardware to the system BIOS.

Detaching devices is not suitable for every shutdown: in an emergency,
or if the system state is inconsistent, we should resort to a fast,
simple shutdown that uses only the pmf(9) shutdown hooks and the
(deprecated) shutdownhooks.  For now, if the flag RB_NOSYNC is set in
boothowto, opt for the fast, simple shutdown.

Add a device flag, DVF_DETACH_SHUTDOWN, that indicates by its presence
that it is safe to detach a device during shutdown.  Introduce macros
CFATTACH_DECL3() and CFATTACH_DECL3_NEW() for creating autoconf
attachments with default device flags.  Add DVF_DETACH_SHUTDOWN
to configuration attachments for atabus(4), atw(4) at cardbus(4),
cardbus(4), cardslot(4), com(4) at isa(4), elanpar(4), elanpex(4),
elansc(4), gpio(4), npx(4) at isa(4), nsphyter(4), pci(4), pcib(4),
pcmcia(4), ppb(4), sip(4), wd(4), and wdc(4) at isa(4).

Add a device-detachment "reason" flag, DETACH_SHUTDOWN, that tells the
autoconf code and a device driver that the reason for detachment is
system shutdown.

Add a sysctl, kern.detachall, that tells the system to try to detach
every device at shutdown, regardless of any device's DVF_DETACH_SHUTDOWN
flag.  The default for kern.detachall is 0.  SET IT TO 1, PLEASE, TO
HELP TEST AND DEBUG DEVICE DETACHMENT AT SHUTDOWN.

This is a work in progress.  In future work, I aim to treat
pseudo-devices more thoroughly, and to gracefully tear down a stack of
(pseudo-)disk drivers and filesystems, including cgd(4), vnd(4), and
raid(4) instances at shutdown.

Also commit some changes that are not easily untangled from the rest:

(1) begin to simplify device_t locking: rename struct pmf_private to
device_lock, and incorporate device_lock into struct device.

(2) #include <sys/device.h> in sys/pmf.h in order to get some
definitions that it needs.  Stop unnecessarily #including <sys/device.h>
in sys/arch/x86/include/pic.h to keep the amd64, xen, and i386 releases
building.

Sync with HEAD.

sync with head.

sync with head.

device_t / softc split. From Hans Rosenfeld.

gpio(4): Extend with open/close to request/release the ppbus(4) on open/close.
ppbus(4): Extend to attach on gpiobus.
From Hans Rosenfeld from tech-kern:
http://mail-index.netbsd.org/tech-kern/2008/04/28/msg001168.html
Hint: Hans sent me this diff which differs in the one from tech-kern in:
- 2-clause license
- sprinkled some consts

- after some discussion with agc@ i agreed it would be a good idea to move
  device_unregister_* to device_deregister_* to be more like the pmf(9)
  functions, especially since a lot of the time the function calls are next
  to each other.

- add device_register_name() support for dk(4).

- add "file-system DEVFS" and "pseudo-device devfsctl" to conf/std seeing
  as these are always needed.

- convert many, many drivers over to the New Devfs World Order. For a
  list of device drivers yet to be converted see,
  http://www.netbsd.org/~mjf/devfs-todo.html.

- add a new device_unregister_all(device_t) function to remove all device
  names associated with a device_t, which saves us having to construct
  device names when the driver is detached.

- add a DEV_AUDIO type for devices.

Sync with HEAD.

sync with head.

sync with HEAD

sync with head.

Use PMF_FN_ARGS, PMF_FN_PROTO.

Sync with HEAD.

sync with head

Sync with HEAD

Use device_t.

sync with HEAD

Sync with HEAD

Sync with head.

Bug fix: record the new state (high/low) set by gpio_pin_write().
I don't know why we gpio(4) didn't do that before, but it seems
harmless.

Add naive power handling: when a gpio(4) instance is resumed, write
each pin's configuration flags and output state from the softc to
the hardware using gpiobus_pin_ctl() and gpiobus_pin_write().
While suspended, fail every ioctl() except for GPIOINFO with EBUSY.

sync with head.

Sync with HEAD.

Kill caddr_t; there will be some MI fallout, but it will be fixed shortly.

sync with head.

sync with head.

Sync with head.

__unused removal on arguments; approved by core.

sync with head

- sprinkle __unused on function decls.
- fix a couple of unused bugs
- no more -Wno-unused for i386

sync with head

sync with head.

add missing initializers

sync with head.

Merge 2006-05-24 NetBSD-current into the "peter-altq" branch.

Sync with head.

sync with head.

sync with head

file gpio.c was added on branch yamt-lazymbuf on 2006-06-21 15:02:46 +0000

Whitespace nit.

sync with head.

Merge 2006-03-31 NetBSD-current into the "peter-altq" branch.

Use device_private().

Use device_unit().

sync with head.

Flesh out the framework for attaching drivers to the GPIO pins.
From OpenBSD, Alexander Yurchenko <grange@openbsd

merge ktrace-lwp.

Sync with HEAD. Here we go again...

file gpio.c was added on branch ktrace-lwp on 2005-11-10 14:04:00 +0000

-kill gba_name in attach arg
-use constants from locators.h

Add __KERNEL_RCSID.

Import general purpose I/O framework from OpenBSD.