Commit a2b7ab45 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'linux-watchdog-4.18-rc1' of git://www.linux-watchdog.org/linux-watchdog 

Pull watchdog updates from Wim Van Sebroeck:
 "Core:
   - simplify getting .drvdata

  renesas_wdt:
   - add support for the R8A77965 WDT and R-Car Gen2
   - remove R-Car M2-W ES2.x from blacklist

  sp805:
   - add restart handler

  hpwdt:
   - claim NMIs generated by iLO5

  mena21_wdt:
   - drop unnecessary mutex lock

  da9062 & da9063:
   - fixes and general cleanups"

* tag 'linux-watchdog-4.18-rc1' of git://www.linux-watchdog.org/linux-watchdog:
  watchdog: da9063: remove duplicated timeout_to_sel calls
  watchdog: da9063: rename helper function to avoid misunderstandings
  watchdog: da9062: remove unused code
  watchdog: da9063: Fix timeout handling during probe
  watchdog: da9063: Fix updating timeout value
  watchdog: da9063: Fix setting/changing timeout
  dt-bindings: watchdog: renesas-wdt: Add R-Car Gen2 support
  watchdog: mena21_wdt: Drop unnecessary mutex lock
  watchdog: renesas-wdt: Add support for the R8A77965 WDT
  watchdog: hpwdt: Claim NMIs generated by iLO5
  watchdog: sp805: add restart handler
  watchdog: renesas-wdt: Remove R-Car M2-W ES2.x from blacklist
  watchdog: simplify getting .drvdata
parents e16c4790 16a7eec2

Documentation/devicetree/bindings/watchdog/renesas-wdt.txt

+16 −7
Original line number Diff line number Diff line 
Renesas Watchdog Timer (WDT) Controller



Required properties:

- compatible : Should be "renesas,<soctype>-wdt", and

	       "renesas,rcar-gen3-wdt" or "renesas,rza-wdt" as fallback.

 - compatible : Must be "renesas,<soctype>-wdt", followed by a generic

		fallback compatible string when compatible with the generic

		version.

	       Examples with soctypes are:

	         - "renesas,r7s72100-wdt" (RZ/A1)

		 - "renesas,r8a7743-wdt" (RZ/G1M)

		 - "renesas,r8a7745-wdt" (RZ/G1E)

	         - "renesas,r8a7790-wdt" (R-Car H2)

	         - "renesas,r8a7791-wdt" (R-Car M2-W)

	         - "renesas,r8a7792-wdt" (R-Car V2H)

	         - "renesas,r8a7793-wdt" (R-Car M2-N)

	         - "renesas,r8a7794-wdt" (R-Car E2)

	         - "renesas,r8a7795-wdt" (R-Car H3)

	         - "renesas,r8a7796-wdt" (R-Car M3-W)

		 - "renesas,r8a77965-wdt" (R-Car M3-N)

	         - "renesas,r8a77970-wdt" (R-Car V3M)

	         - "renesas,r8a77995-wdt" (R-Car D3)



  When compatible with the generic version, nodes must list the SoC-specific

  version corresponding to the platform first, followed by the generic

  version.

	         - "renesas,r7s72100-wdt" (RZ/A1)

		The generic compatible string must be:

		 - "renesas,rza-wdt" for RZ/A

		 - "renesas,rcar-gen2-wdt" for R-Car Gen2 and RZ/G

		 - "renesas,rcar-gen3-wdt" for R-Car Gen3



- reg : Should contain WDT registers location and length

- clocks : the clock feeding the watchdog timer.

drivers/watchdog/cadence_wdt.c

+2 −4
Original line number Diff line number Diff line
@@ -418,8 +418,7 @@ static void cdns_wdt_shutdown(struct platform_device *pdev) 
 */

static int __maybe_unused cdns_wdt_suspend(struct device *dev)

{

	struct platform_device *pdev = to_platform_device(dev);

	struct cdns_wdt *wdt = platform_get_drvdata(pdev);

	struct cdns_wdt *wdt = dev_get_drvdata(dev);



	if (watchdog_active(&wdt->cdns_wdt_device)) {

		cdns_wdt_stop(&wdt->cdns_wdt_device);
@@ -438,8 +437,7 @@ static int __maybe_unused cdns_wdt_suspend(struct device *dev) 
static int __maybe_unused cdns_wdt_resume(struct device *dev)

{

	int ret;

	struct platform_device *pdev = to_platform_device(dev);

	struct cdns_wdt *wdt = platform_get_drvdata(pdev);

	struct cdns_wdt *wdt = dev_get_drvdata(dev);



	if (watchdog_active(&wdt->cdns_wdt_device)) {

		ret = clk_prepare_enable(wdt->clk);

drivers/watchdog/da9062_wdt.c

+0 −10
Original line number Diff line number Diff line
@@ -30,14 +30,8 @@ static const unsigned int wdt_timeout[] = { 0, 2, 4, 8, 16, 32, 65, 131 }; 
struct da9062_watchdog {

	struct da9062 *hw;

	struct watchdog_device wdtdev;

	unsigned long j_time_stamp;

};



static void da9062_set_window_start(struct da9062_watchdog *wdt)

{

	wdt->j_time_stamp = jiffies;

}



static unsigned int da9062_wdt_timeout_to_sel(unsigned int secs)

{

	unsigned int i;
@@ -59,8 +53,6 @@ static int da9062_reset_watchdog_timer(struct da9062_watchdog *wdt) 
			   DA9062AA_WATCHDOG_MASK,

			   DA9062AA_WATCHDOG_MASK);



	da9062_set_window_start(wdt);



	return ret;

}
@@ -232,8 +224,6 @@ static int da9062_wdt_probe(struct platform_device *pdev) 
		return ret;

	}



	da9062_set_window_start(wdt);



	return da9062_wdt_ping(&wdt->wdtdev);

}

drivers/watchdog/da9063_wdt.c

+62 −11
Original line number Diff line number Diff line
@@ -45,8 +45,46 @@ static unsigned int da9063_wdt_timeout_to_sel(unsigned int secs) 
	return DA9063_TWDSCALE_MAX;

}



static int _da9063_wdt_set_timeout(struct da9063 *da9063, unsigned int regval)

/*

 * Return 0 if watchdog is disabled, else non zero.

 */

static unsigned int da9063_wdt_is_running(struct da9063 *da9063)

{

	unsigned int val;



	regmap_read(da9063->regmap, DA9063_REG_CONTROL_D, &val);



	return val & DA9063_TWDSCALE_MASK;

}



static int da9063_wdt_disable_timer(struct da9063 *da9063)

{

	return regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,

				  DA9063_TWDSCALE_MASK,

				  DA9063_TWDSCALE_DISABLE);

}



static int

da9063_wdt_update_timeout(struct da9063 *da9063, unsigned int timeout)

{

	unsigned int regval;

	int ret;



	/*

	 * The watchdog triggers a reboot if a timeout value is already

	 * programmed because the timeout value combines two functions

	 * in one: indicating the counter limit and starting the watchdog.

	 * The watchdog must be disabled to be able to change the timeout

	 * value if the watchdog is already running. Then we can set the

	 * new timeout value which enables the watchdog again.

	 */

	ret = da9063_wdt_disable_timer(da9063);

	if (ret)

		return ret;



	usleep_range(150, 300);

	regval = da9063_wdt_timeout_to_sel(timeout);



	return regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,

				  DA9063_TWDSCALE_MASK, regval);

}
@@ -54,11 +92,9 @@ static int _da9063_wdt_set_timeout(struct da9063 *da9063, unsigned int regval) 
static int da9063_wdt_start(struct watchdog_device *wdd)

{

	struct da9063 *da9063 = watchdog_get_drvdata(wdd);

	unsigned int selector;

	int ret;



	selector = da9063_wdt_timeout_to_sel(wdd->timeout);

	ret = _da9063_wdt_set_timeout(da9063, selector);

	ret = da9063_wdt_update_timeout(da9063, wdd->timeout);

	if (ret)

		dev_err(da9063->dev, "Watchdog failed to start (err = %d)\n",

			ret);
@@ -71,8 +107,7 @@ static int da9063_wdt_stop(struct watchdog_device *wdd) 
	struct da9063 *da9063 = watchdog_get_drvdata(wdd);

	int ret;



	ret = regmap_update_bits(da9063->regmap, DA9063_REG_CONTROL_D,

				 DA9063_TWDSCALE_MASK, DA9063_TWDSCALE_DISABLE);

	ret = da9063_wdt_disable_timer(da9063);

	if (ret)

		dev_alert(da9063->dev, "Watchdog failed to stop (err = %d)\n",

			  ret);
@@ -98,16 +133,26 @@ static int da9063_wdt_set_timeout(struct watchdog_device *wdd, 
				  unsigned int timeout)

{

	struct da9063 *da9063 = watchdog_get_drvdata(wdd);

	unsigned int selector;

	int ret;

	int ret = 0;



	/*

	 * There are two cases when a set_timeout() will be called:

	 * 1. The watchdog is off and someone wants to set the timeout for the

	 *    further use.

	 * 2. The watchdog is already running and a new timeout value should be

	 *    set.

	 *

	 * The watchdog can't store a timeout value not equal zero without

	 * enabling the watchdog, so the timeout must be buffered by the driver.

	 */

	if (watchdog_active(wdd))

		ret = da9063_wdt_update_timeout(da9063, timeout);



	selector = da9063_wdt_timeout_to_sel(timeout);

	ret = _da9063_wdt_set_timeout(da9063, selector);

	if (ret)

		dev_err(da9063->dev, "Failed to set watchdog timeout (err = %d)\n",

			ret);

	else

		wdd->timeout = wdt_timeout[selector];

		wdd->timeout = wdt_timeout[da9063_wdt_timeout_to_sel(timeout)];



	return ret;

}
@@ -171,6 +216,12 @@ static int da9063_wdt_probe(struct platform_device *pdev) 


	watchdog_set_drvdata(wdd, da9063);



	/* Change the timeout to the default value if the watchdog is running */

	if (da9063_wdt_is_running(da9063)) {

		da9063_wdt_update_timeout(da9063, DA9063_WDG_TIMEOUT);

		set_bit(WDOG_HW_RUNNING, &wdd->status);

	}



	return devm_watchdog_register_device(&pdev->dev, wdd);

}

drivers/watchdog/hpwdt.c

+1 −1
Original line number Diff line number Diff line
@@ -159,7 +159,7 @@ static int hpwdt_pretimeout(unsigned int ulReason, struct pt_regs *regs) 
		"3. OA Forward Progress Log\n"

		"4. iLO Event Log";



	if (ilo5 && ulReason == NMI_UNKNOWN && mynmi)

	if (ilo5 && ulReason == NMI_UNKNOWN && !mynmi)

		return NMI_DONE;



	if (ilo5 && !pretimeout)

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