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linux/drivers/watchdog
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Mika Westerberg 058dfc7670 ACPI / watchdog: Add support for WDAT hardware watchdog 
Starting from Intel Skylake the iTCO watchdog timer registers were moved to
reside in the same register space with SMBus host controller.  Not all
needed registers are available though and we need to unhide P2SB (Primary
to Sideband) device briefly to be able to read status of required NO_REBOOT
bit. The i2c-i801.c SMBus driver used to handle this and creation of the
iTCO watchdog platform device.

Windows, on the other hand, does not use the iTCO watchdog hardware
directly even if it is available. Instead it relies on ACPI Watchdog Action
Table (WDAT) table to describe the watchdog hardware to the OS. This table
contains necessary information about the the hardware and also set of
actions which are executed by a driver as needed.

This patch implements a new watchdog driver that takes advantage of the
ACPI WDAT table. We split the functionality into two parts: first part
enumerates the WDAT table and if found, populates resources and creates
platform device for the actual driver. The second part is the driver
itself.

The reason for the split is that this way we can make the driver itself to
be a module and loaded automatically if the WDAT table is found. Otherwise
the module is not loaded.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-09-24 02:10:04 +02:00
..
acquirewdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
advantechwdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
alim1535_wdt.c watchdog: remove DEFINE_PCI_DEVICE_TABLE macro 2014-01-28 19:07:07 +01:00
alim7101_wdt.c watchdog: alim7101: register restart handler with kernel restart handler 2014-09-26 00:00:32 -07:00
ar7_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
asm9260_wdt.c watchdog: asm9260: remove __init and __exit annotations 2016-01-11 22:48:05 +01:00
aspeed_wdt.c watchdog: Add Aspeed watchdog driver 2016-07-17 20:59:10 +02:00
at32ap700x_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
at91rm9200_wdt.c Merge git://www.linux-watchdog.org/linux-watchdog 2015-09-11 15:12:59 -07:00
at91sam9_wdt.c watchdog: at91sam9: get and use slow clock 2015-09-09 21:38:52 +02:00
at91sam9_wdt.h watchdog: add a driver to support SAMA5D4 watchdog timer 2015-09-09 21:38:29 +02:00
ath79_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
atlas7_wdt.c watchdog: atlas7_wdt: test clock rate to avoid division by 0 2016-03-16 21:09:08 +01:00
bcm47xx_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
bcm63xx_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
bcm2835_wdt.c watchdog: bcm2835_wdt: remove redundant ->set_timeout callback 2016-07-17 21:03:50 +02:00
bcm7038_wdt.c watchdog: Watchdog driver for Broadcom Set-Top Box 2015-10-27 16:12:02 +01:00
bcm_kona_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
bfin_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
booke_wdt.c watchdog: booke_wdt: Use infrastructure to check timeout limits 2015-09-09 21:34:34 +02:00
cadence_wdt.c watchdog: cadence_wdt: use to_platform_device() 2015-12-27 21:15:34 +01:00
coh901327_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
cpu5wdt.c watchdog: delete non-required instances of include <linux/init.h> 2014-03-31 13:22:45 +02:00
cpwd.c watchdog: cpwd: Use setup_timer() 2016-05-14 18:25:49 +02:00
da9052_wdt.c watchdog: da9052_wdt: Drop reference counting 2015-12-29 20:36:03 +01:00
da9055_wdt.c watchdog: da9055_wdt: Drop reference counting 2015-12-29 20:36:04 +01:00
da9062_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
da9063_wdt.c watchdog: da9063_wdt: don't trigger watchdog too fast 2016-07-17 21:02:42 +02:00
davinci_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
diag288_wdt.c watchdog: diag288: Stop re-using watchdog core internal flags 2015-12-29 20:36:02 +01:00
digicolor_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
dw_wdt.c watchdog: dw_wdt: Convert to use watchdog infrastructure 2016-03-16 21:11:21 +01:00
ebc-c384_wdt.c watchdog: ebc-c384_wdt: Utilize the ISA bus driver 2016-05-02 09:32:04 -07:00
ep93xx_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
eurotechwdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
f71808e_wdt.c watchdog: f71808e_wdt: Add F81866 support 2016-07-17 21:00:55 +02:00
gef_wdt.c watchdog: Fix module autoload for OF platform driver 2015-09-28 10:56:01 +02:00
geodewdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
gpio_wdt.c watchdog: gpio_wdt: Fix missing platform_set_drvdata() in gpio_wdt_probe() 2016-07-27 10:47:43 +02:00
hpwdt.c hpwdt: use nmi_panic() when kernel panics in NMI handler 2016-03-22 15:36:02 -07:00
i6300esb.c watchdog: delete non-required instances of include <linux/init.h> 2014-03-31 13:22:45 +02:00
ib700wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
ibmasr.c watchdog: fix checkpatch warnings and error 2014-03-31 13:31:06 +02:00
ie6xx_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
imgpdc_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
imx2_wdt.c watchdog: imx2_wdt: add external reset support via dt prop 2016-05-14 09:36:38 +02:00
indydog.c watchdog: indydog: Simplify indydog_{start,stop} 2014-03-31 13:26:31 +02:00
intel-mid_wdt.c watchdog: intel-mid: add Magic Closure flag 2015-10-28 22:58:32 +01:00
intel_scu_watchdog.c watchdog: intel_scu_watchdog: Remove unused variable 2014-03-31 13:26:56 +02:00
intel_scu_watchdog.h
iop_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
it87_wdt.c watchdog: it87_wdt: add IT8783 ID 2015-02-17 21:32:08 +01:00
it8712f_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
iTCO_vendor.h
iTCO_vendor_support.c
iTCO_wdt.c watchdog: iTCO-wdt: handle 5th variation for Apollo Lake 2016-07-17 21:02:09 +02:00
ixp4xx_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
jz4740_wdt.c watchdog: remove error message when unable to allocate watchdog device 2016-05-14 16:24:43 +02:00
Kconfig ACPI / watchdog: Add support for WDAT hardware watchdog 2016-09-24 02:10:04 +02:00
kempld_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
ks8695_wdt.c char: make misc_deregister a void function 2015-08-05 10:35:49 -07:00
lantiq_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
lpc18xx_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
m54xx_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
machzwd.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
Makefile ACPI / watchdog: Add support for WDAT hardware watchdog 2016-09-24 02:10:04 +02:00
max63xx_wdt.c watchdog: max63xx: make module's license marker match the header 2016-01-31 16:51:56 +01:00
max77620_wdt.c watchdog: max77620: Add support for watchdog timer 2016-07-17 21:01:07 +02:00
mei_wdt.c watchdog: mei_wdt: re-register device on event 2016-02-07 13:00:52 -08:00
mena21_wdt.c watchdog: mena21: Do not use device pointer from struct watchdog_device 2015-12-28 23:04:06 +01:00
menf21bmc_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
meson_gxbb_wdt.c watchdog: Add Meson GXBB Watchdog Driver 2016-07-17 21:03:25 +02:00
meson_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
mixcomwd.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
moxart_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
mpc8xxx_wdt.c watchdog: mpc8xxx: use better error code when watchdog cannot be enabled 2015-09-09 21:37:51 +02:00
mt7621_wdt.c watchdog: add MT7621 watchdog support 2016-01-09 17:45:28 +01:00
mtk_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
mtx-1_wdt.c watchdog: delete non-required instances of include <linux/init.h> 2014-03-31 13:22:45 +02:00
mv64x60_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
ni903x_wdt.c watchdog: ni903x_wdt: Add NI 903x/913x watchdog driver 2016-03-01 16:25:39 +01:00
nuc900_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
nv_tco.c watchdog: add support for MCP78S chipset in nv_tco 2016-07-17 21:04:13 +02:00
nv_tco.h
octeon-wdt-main.c watchdog: octeon: Handle the FROZEN hot plug notifier actions. 2016-05-14 09:22:21 +02:00
octeon-wdt-nmi.S
of_xilinx_wdt.c watchdog: xilinx: Remove .owner field for driver 2014-10-20 20:43:42 +02:00
omap_wdt.c watchdog: omap: don't disable the timer when it should be enabled early 2015-12-27 21:09:40 +01:00
omap_wdt.h watchdog: omap_wdt: implement get_timeleft 2015-06-22 15:54:35 +02:00
orion_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
pc87413_wdt.c watchdog: fix checkpatch warnings and error 2014-03-31 13:31:06 +02:00
pcwd.c watchdog: pcwd: Utilize the module_isa_driver macro 2016-07-17 20:59:23 +02:00
pcwd_pci.c watchdog: remove DEFINE_PCI_DEVICE_TABLE macro 2014-01-28 19:07:07 +01:00
pcwd_usb.c watchdog: pcwd_usb: fix compilation warning 2016-01-31 16:52:15 +01:00
pic32-dmt.c watchdog: pic32-dmt: Remove .owner field for driver 2016-07-25 12:02:32 +02:00
pic32-wdt.c watchdog: pic32-wdt: Fix return value check in pic32_wdt_drv_probe() 2016-07-25 12:02:43 +02:00
pika_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
pnx833x_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
pnx4008_wdt.c watchdog: pnx4008: restart: support "cmd" from userspace 2016-03-16 21:09:42 +01:00
qcom-wdt.c watchdog: qcom: configure BARK time in addition to BITE time 2016-07-17 21:03:14 +02:00
rc32434_wdt.c watchdog: rc32434_wdt: fix ioctl error handling 2016-03-01 15:29:42 +01:00
rdc321x_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
renesas_wdt.c watchdog: renesas-wdt: add driver 2016-05-14 18:15:40 +02:00
retu_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
riowd.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
rn5t618_wdt.c watchdog: add driver for Ricoh RN5T618 watchdog 2014-10-20 20:55:02 +02:00
rt2880_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
s3c2410_wdt.c watchdog: s3c2410_wdt: Add max and min timeout values 2016-03-16 21:08:09 +01:00
sa1100_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sama5d4_wdt.c watchdog: add a driver to support SAMA5D4 watchdog timer 2015-09-09 21:38:29 +02:00
sb_wdog.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sbc60xxwdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sbc7240_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sbc8360.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sbc_epx_c3.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sbc_fitpc2_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
sbsa_gwdt.c watchdog: sbsa: Drop status function 2016-07-19 10:09:12 +02:00
sc520_wdt.c watchdog: sc520_wdt: Remove unused variable 2014-03-31 13:27:34 +02:00
sc1200wdt.c sc1200_wdt: Fix oops 2013-12-10 08:48:15 +01:00
sch311x_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
scx200_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
shwdt.c watchdog: shwdt: Use setup_timer() 2016-05-14 18:25:56 +02:00
sirfsoc_wdt.c watchdog: sirf: fix __iomem * warnings 2016-07-17 21:00:44 +02:00
smsc37b787_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
softdog.c watchdog: softdog: improve coding style 2016-07-17 20:54:52 +02:00
sp805_wdt.c watchdog: sp805: ping fails to abort wdt reset 2016-01-31 16:52:08 +01:00
sp5100_tco.c watchdog: sp5100_tco: properly check for new register layouts 2016-05-14 16:16:04 +02:00
sp5100_tco.h
st_lpc_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
stmp3xxx_rtc_wdt.c watchdog: stmp3xxx: Remove unused variables 2016-01-11 21:51:28 +01:00
sun4v_wdt.c Add sun4v_wdt watchdog driver 2016-01-31 11:06:24 -08:00
sunxi_wdt.c watchdog: Add 'action' and 'data' parameters to restart handler callback 2016-03-01 15:36:35 +01:00
tangox_wdt.c watchdog: tangox: Set max_hw_heartbeat_ms instead of max_timeout 2016-07-18 12:10:21 +02:00
tegra_wdt.c watchdog: tegra: Stop watchdog first if restarting 2015-11-23 08:59:45 +01:00
ts72xx_wdt.c char: make misc_deregister a void function 2015-08-05 10:35:49 -07:00
ts4800_wdt.c watchdog: ts4800: add driver for TS-4800 watchdog 2015-12-28 22:29:35 +01:00
twl4030_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
txx9wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
ux500_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
via_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
w83627hf_wdt.c watchdog: w83627hf: Added NCT6102D support. 2016-03-01 14:22:05 +01:00
w83877f_wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
w83977f_wdt.c watchdog: w83977f_wdt: underflow in wdt_set_timeout() 2015-11-23 08:59:30 +01:00
wafer5823wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
watchdog_core.c watchdog: skip min and max timeout validity check when max_hw_heartbeat_ms is defined 2016-07-17 20:59:40 +02:00
watchdog_core.h watchdog: Create watchdog device in watchdog_dev.c 2015-12-29 20:36:01 +01:00
watchdog_dev.c watchdog: core: Clear WDOG_HW_RUNNING before calling the stop function 2016-07-25 12:03:04 +02:00
wd501p.h
wdat_wdt.c ACPI / watchdog: Add support for WDAT hardware watchdog 2016-09-24 02:10:04 +02:00
wdrtas.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
wdt.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
wdt285.c watchdog: wdt285: Fix variable type 2014-03-31 13:28:20 +02:00
wdt977.c watchdog: Get rid of MODULE_ALIAS_MISCDEV statements 2013-11-17 19:38:13 +01:00
wdt_pci.c watchdog: delete non-required instances of include <linux/init.h> 2014-03-31 13:22:45 +02:00
wm831x_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
wm8350_wdt.c Watchdog: Fix parent of watchdog_devices 2015-09-09 21:39:22 +02:00
xen_wdt.c watchdog: drop owner assignment from platform_drivers 2014-10-20 16:21:56 +02:00
ziirave_wdt.c watchdog: ziirave_wdt: Correct I2C device id to fix module autoloading. 2016-07-17 21:01:31 +02:00