Merge git://www.linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:

 - add support for the watchdog on Meson8 and Meson8m2

 - add support for MediaTek MT7623 and MT7622 SoC

 - add support for the r8a77995 wdt

 - explicitly request exclusive reset control for asm9260_wdt,
   zx2967_wdt, rt2880_wdt and mt7621_wdt

 - improvements to asm9260_wdt, aspeed_wdt, renesas_wdt and cadence_wdt

 - add support for reading freq via CCF + suspend/resume support for
   of_xilinx_wdt

 - constify watchdog_ops and various device-id structures

 - revert of commit 1fccb73011ea ("iTCO_wdt: all versions count down
   twice") (Bug 196509)

* git://www.linux-watchdog.org/linux-watchdog: (40 commits)
  watchdog: mei_wdt: constify mei_cl_device_id
  watchdog: sp805: constify amba_id
  watchdog: ziirave: constify i2c_device_id
  watchdog: sc1200: constify pnp_device_id
  dt-bindings: watchdog: renesas-wdt: Add support for the r8a77995 wdt
  watchdog: renesas_wdt: update copyright dates
  watchdog: renesas_wdt: make 'clk' a variable local to probe()
  watchdog: renesas_wdt: consistently use RuntimePM for clock management
  watchdog: aspeed: Support configuration of external signal properties
  dt-bindings: watchdog: aspeed: External reset signal properties
  drivers/watchdog: Add optional ASPEED device tree properties
  drivers/watchdog: ASPEED reference dev tree properties for config
  watchdog: da9063_wdt: Simplify by removing unneeded struct...
  watchdog: bcm7038: Check the return value from clk_prepare_enable()
  watchdog: qcom: Check for platform_get_resource() failure
  watchdog: of_xilinx_wdt: Add suspend/resume support
  watchdog: of_xilinx_wdt: Add support for reading freq via CCF
  dt-bindings: watchdog: mediatek: add support for MediaTek MT7623 and MT7622 SoC
  watchdog: max77620_wdt: constify platform_device_id
  watchdog: pcwd_usb: constify usb_device_id
  ...

5 files changed, 49 insertions, 2 deletions

diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
index c5e74d7b4406..c5077a1f5cb3 100644
--- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
@@ -8,9 +8,49 @@ Required properties:
  - reg: physical base address of the controller and length of memory mapped
    region
 
+Optional properties:
+
+ - aspeed,reset-type = "cpu|soc|system|none"
+
+   Reset behavior - Whenever a timeout occurs the watchdog can be programmed
+   to generate one of three different, mutually exclusive, types of resets.
+
+   Type "none" can be specified to indicate that no resets are to be done.
+   This is useful in situations where another watchdog engine on chip is
+   to perform the reset.
+
+   If 'aspeed,reset-type=' is not specfied the default is to enable system
+   reset.
+
+   Reset types:
+
+        - cpu: Reset CPU on watchdog timeout
+
+        - soc: Reset 'System on Chip' on watchdog timeout
+
+        - system: Reset system on watchdog timeout
+
+        - none: No reset is performed on timeout. Assumes another watchdog
+                engine is responsible for this.
+
+ - aspeed,alt-boot:    If property is present then boot from alternate block.
+ - aspeed,external-signal: If property is present then signal is sent to
+			external reset counter (only WDT1 and WDT2). If not
+			specified no external signal is sent.
+ - aspeed,ext-pulse-duration: External signal pulse duration in microseconds
+
+Optional properties for AST2500-compatible watchdogs:
+ - aspeed,ext-push-pull: If aspeed,external-signal is present, set the pin's
+			 drive type to push-pull. The default is open-drain.
+ - aspeed,ext-active-high: If aspeed,external-signal is present and and the pin
+			   is configured as push-pull, then set the pulse
+			   polarity to active-high. The default is active-low.
+
 Example:
 
 	wdt1: watchdog@1e785000 {
 		compatible = "aspeed,ast2400-wdt";
 		reg = <0x1e785000 0x1c>;
+		aspeed,reset-type = "system";
+		aspeed,external-signal;
 	};
diff --git a/Documentation/devicetree/bindings/watchdog/meson-wdt.txt b/Documentation/devicetree/bindings/watchdog/meson-wdt.txt
index ae70185d96e6..8a6d84cb36c9 100644
--- a/Documentation/devicetree/bindings/watchdog/meson-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/meson-wdt.txt
@@ -2,7 +2,11 @@ Meson SoCs Watchdog timer
 
 Required properties:
 
-- compatible : should be "amlogic,meson6-wdt" or "amlogic,meson8b-wdt"
+- compatible : depending on the SoC this should be one of:
+	"amlogic,meson6-wdt" on Meson6 SoCs
+	"amlogic,meson8-wdt" and "amlogic,meson6-wdt" on Meson8 SoCs
+	"amlogic,meson8b-wdt" on Meson8b SoCs
+	"amlogic,meson8m2-wdt" and "amlogic,meson8b-wdt" on Meson8m2 SoCs
 - reg : Specifies base physical address and size of the registers.
 
 Example:
diff --git a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
index 20ada673ab0c..235de0683bb6 100644
--- a/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/mtk-wdt.txt
@@ -6,6 +6,8 @@ Required properties:
 	"mediatek,mt2701-wdt", "mediatek,mt6589-wdt": for MT2701
 	"mediatek,mt6589-wdt": for MT6589
 	"mediatek,mt6797-wdt", "mediatek,mt6589-wdt": for MT6797
+	"mediatek,mt7622-wdt", "mediatek,mt6589-wdt": for MT7622
+	"mediatek,mt7623-wdt", "mediatek,mt6589-wdt": for MT7623
 
 - reg : Specifies base physical address and size of the registers.
 
diff --git a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
index 9e306afbbd49..bf6d1ca58af7 100644
--- a/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/renesas-wdt.txt
@@ -6,6 +6,7 @@ Required properties:
 	       Examples with soctypes are:
 	         - "renesas,r8a7795-wdt" (R-Car H3)
 	         - "renesas,r8a7796-wdt" (R-Car M3-W)
+	         - "renesas,r8a77995-wdt" (R-Car D3)
 	         - "renesas,r7s72100-wdt" (RZ/A1)
 
   When compatible with the generic version, nodes must list the SoC-specific
diff --git a/Documentation/watchdog/watchdog-parameters.txt b/Documentation/watchdog/watchdog-parameters.txt
index b3526365ea8e..6f9d7b418917 100644
--- a/Documentation/watchdog/watchdog-parameters.txt
+++ b/Documentation/watchdog/watchdog-parameters.txt
@@ -117,7 +117,7 @@ nowayout: Watchdog cannot be stopped once started
 -------------------------------------------------
 iTCO_wdt:
 heartbeat: Watchdog heartbeat in seconds.
-	(5<=heartbeat<=74 (TCO v1) or 1226 (TCO v2), default=30)
+	(2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=30)
 nowayout: Watchdog cannot be stopped once started
 	(default=kernel config parameter)
 -------------------------------------------------