[PATCH v4 0/3] Introduce EC-based watchdog

[PATCH v4 0/3] Introduce EC-based watchdog

[Lukasz Majczak]

Chromeos devices are equipped with the embedded controller (EC)
that can be used as a watchdog. The following patches
updates the structures and definitions required to
communicate with EC-based watchdog and implements the
driver itself.

V1:https://patchwork.kernel.org/project/linux-watchdog/patch/20240117102450.4080839-1-lma@chromium.org/
V2:https://patchwork.kernel.org/project/linux-watchdog/list/?series=817925
V3:https://patchwork.kernel.org/project/linux-watchdog/list/?series=818036

Changelog
V3->V4:
* updated sizeof() argument with pointer dereference
* added cros_ec_wdt_id to the driver structure
* "mfd: cros_ec: Register EC-based watchdog subdevice"
  has been already applied to the for-mfd-next
V2->V3:
* drop "-drv" from driver name
* use format #define<space>NAME<tab>value
V1->V2:
* Split into three patches
* Supplement the watchdog configuration with min/max timeouts
* Removed struct cros_ec_wdt_data  and get aligned to watchdog framework
* Simplified suspend/resume callbacks
* Removed excessive log messages
* Reworked cros_ec_wdt_send_hang_detect() function to be more generic
* Usage of devm_* allowed to delete .remove module callback
* Changed MODULE_ALIAS to MODULE_DEVICE_TABLE
* Moved clearing bootstatus (on EC) to probe() and thanks to that
  got rid of .shutdown() module callback
* Fixed/removed comments, removed unused includes and general cleanup

Best regards,
Lukasz

Lukasz Majczak (3):
  platform/chrome: Update binary interface for EC-based watchdog
  watchdog: Add ChromeOS EC-based watchdog driver
  mfd: cros_ec: Register EC-based watchdog subdevice

 MAINTAINERS                                   |   6 +
 drivers/mfd/cros_ec_dev.c                     |   9 +
 drivers/watchdog/Kconfig                      |  11 +
 drivers/watchdog/Makefile                     |   1 +
 drivers/watchdog/cros_ec_wdt.c                | 204 ++++++++++++++++++
 .../linux/platform_data/cros_ec_commands.h    |  78 +++----
 6 files changed, 266 insertions(+), 43 deletions(-)
 create mode 100644 drivers/watchdog/cros_ec_wdt.c

-- 
2.43.0.429.g432eaa2c6b-goog

[PATCH v4 1/3] platform/chrome: Update binary interface for EC-based watchdog

[Lukasz Majczak]

Update structures and defines related to EC_CMD_HANG_DETECT
to allow usage of new EC-based watchdog.

Signed-off-by: Lukasz Majczak <lma@chromium.org>
---
 .../linux/platform_data/cros_ec_commands.h    | 78 +++++++++----------
 1 file changed, 35 insertions(+), 43 deletions(-)

diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index 7dae17b62a4d..ecc47d5fe239 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -3961,60 +3961,52 @@ struct ec_response_i2c_passthru {
 } __ec_align1;
 
 /*****************************************************************************/
-/* Power button hang detect */
-
+/* AP hang detect */
 #define EC_CMD_HANG_DETECT 0x009F
 
-/* Reasons to start hang detection timer */
-/* Power button pressed */
-#define EC_HANG_START_ON_POWER_PRESS  BIT(0)
-
-/* Lid closed */
-#define EC_HANG_START_ON_LID_CLOSE    BIT(1)
-
- /* Lid opened */
-#define EC_HANG_START_ON_LID_OPEN     BIT(2)
-
-/* Start of AP S3->S0 transition (booting or resuming from suspend) */
-#define EC_HANG_START_ON_RESUME       BIT(3)
-
-/* Reasons to cancel hang detection */
+#define EC_HANG_DETECT_MIN_TIMEOUT 5
+#define EC_HANG_DETECT_MAX_TIMEOUT 65535
 
-/* Power button released */
-#define EC_HANG_STOP_ON_POWER_RELEASE BIT(8)
+/* EC hang detect commands */
+enum ec_hang_detect_cmds {
+	/* Reload AP hang detect timer. */
+	EC_HANG_DETECT_CMD_RELOAD = 0x0,
 
-/* Any host command from AP received */
-#define EC_HANG_STOP_ON_HOST_COMMAND  BIT(9)
+	/* Stop AP hang detect timer. */
+	EC_HANG_DETECT_CMD_CANCEL = 0x1,
 
-/* Stop on end of AP S0->S3 transition (suspending or shutting down) */
-#define EC_HANG_STOP_ON_SUSPEND       BIT(10)
+	/* Configure watchdog with given reboot timeout and
+	 * cancel currently running AP hang detect timer.
+	 */
+	EC_HANG_DETECT_CMD_SET_TIMEOUT = 0x2,
 
-/*
- * If this flag is set, all the other fields are ignored, and the hang detect
- * timer is started.  This provides the AP a way to start the hang timer
- * without reconfiguring any of the other hang detect settings.  Note that
- * you must previously have configured the timeouts.
- */
-#define EC_HANG_START_NOW             BIT(30)
+	/* Get last hang status - whether the AP boot was clear or not */
+	EC_HANG_DETECT_CMD_GET_STATUS = 0x3,
 
-/*
- * If this flag is set, all the other fields are ignored (including
- * EC_HANG_START_NOW).  This provides the AP a way to stop the hang timer
- * without reconfiguring any of the other hang detect settings.
- */
-#define EC_HANG_STOP_NOW              BIT(31)
+	/* Clear last hang status. Called when AP is rebooting/shutting down
+	 * gracefully.
+	 */
+	EC_HANG_DETECT_CMD_CLEAR_STATUS = 0x4
+};
 
 struct ec_params_hang_detect {
-	/* Flags; see EC_HANG_* */
-	uint32_t flags;
-
-	/* Timeout in msec before generating host event, if enabled */
-	uint16_t host_event_timeout_msec;
+	uint16_t command; /* enum ec_hang_detect_cmds */
+	/* Timeout in seconds before generating reboot */
+	uint16_t reboot_timeout_sec;
+} __ec_align2;
 
-	/* Timeout in msec before generating warm reboot, if enabled */
-	uint16_t warm_reboot_timeout_msec;
-} __ec_align4;
+/* Status codes that describe whether AP has boot normally or the hang has been
+ * detected and EC has reset AP
+ */
+enum ec_hang_detect_status {
+	EC_HANG_DETECT_AP_BOOT_NORMAL = 0x0,
+	EC_HANG_DETECT_AP_BOOT_EC_WDT = 0x1,
+	EC_HANG_DETECT_AP_BOOT_COUNT,
+};
 
+struct ec_response_hang_detect {
+	uint8_t status; /* enum ec_hang_detect_status */
+} __ec_align1;
 /*****************************************************************************/
 /* Commands for battery charging */
 
-- 
2.43.0.429.g432eaa2c6b-goog

[PATCH v4 2/3] watchdog: Add ChromeOS EC-based watchdog driver

[Lukasz Majczak]

Embedded Controller (EC) present on Chromebook devices
can be used as a watchdog.
Implement a driver to support it.

Signed-off-by: Lukasz Majczak <lma@chromium.org>
---
 MAINTAINERS                    |   6 +
 drivers/watchdog/Kconfig       |  11 ++
 drivers/watchdog/Makefile      |   1 +
 drivers/watchdog/cros_ec_wdt.c | 204 +++++++++++++++++++++++++++++++++
 4 files changed, 222 insertions(+)
 create mode 100644 drivers/watchdog/cros_ec_wdt.c

diff --git a/MAINTAINERS b/MAINTAINERS
index ef90ddc0fda6..aaae581aae70 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4981,6 +4981,12 @@ R:	Sami Kyöstilä <skyostil@chromium.org>
 S:	Maintained
 F:	drivers/platform/chrome/cros_hps_i2c.c
 
+CHROMEOS EC WATCHDOG
+M:	Lukasz Majczak <lma@chromium.org>
+L:	chrome-platform@lists.linux.dev
+S:	Maintained
+F:	drivers/watchdog/cros_ec_wdt.c
+
 CHRONTEL CH7322 CEC DRIVER
 M:	Joe Tessler <jrt@google.com>
 L:	linux-media@vger.kernel.org
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 7d22051b15a2..4700b218340f 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -181,6 +181,17 @@ config BD957XMUF_WATCHDOG
 	  watchdog. Alternatively say M to compile the driver as a module,
 	  which will be called bd9576_wdt.
 
+config CROS_EC_WATCHDOG
+	tristate "ChromeOS EC-based watchdog"
+	select WATCHDOG_CORE
+	depends on CROS_EC
+	help
+	  Watchdog driver for Chromebook devices equipped with embedded controller.
+	  Trigger event is recorded in EC and checked on the subsequent boot.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called cros_ec_wdt.
+
 config DA9052_WATCHDOG
 	tristate "Dialog DA9052 Watchdog"
 	depends on PMIC_DA9052 || COMPILE_TEST
diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
index 7cbc34514ec1..3710c218f05e 100644
--- a/drivers/watchdog/Makefile
+++ b/drivers/watchdog/Makefile
@@ -217,6 +217,7 @@ obj-$(CONFIG_XEN_WDT) += xen_wdt.o
 
 # Architecture Independent
 obj-$(CONFIG_BD957XMUF_WATCHDOG) += bd9576_wdt.o
+obj-$(CONFIG_CROS_EC_WATCHDOG) += cros_ec_wdt.o
 obj-$(CONFIG_DA9052_WATCHDOG) += da9052_wdt.o
 obj-$(CONFIG_DA9055_WATCHDOG) += da9055_wdt.o
 obj-$(CONFIG_DA9062_WATCHDOG) += da9062_wdt.o
diff --git a/drivers/watchdog/cros_ec_wdt.c b/drivers/watchdog/cros_ec_wdt.c
new file mode 100644
index 000000000000..ba045e29f9a5
--- /dev/null
+++ b/drivers/watchdog/cros_ec_wdt.c
@@ -0,0 +1,204 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2024 Google LLC.
+ * Author: Lukasz Majczak <lma@chromium.com>
+ */
+
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_data/cros_ec_commands.h>
+#include <linux/platform_data/cros_ec_proto.h>
+#include <linux/platform_device.h>
+#include <linux/watchdog.h>
+
+#define CROS_EC_WATCHDOG_DEFAULT_TIME	30 /* seconds */
+#define DRV_NAME	"cros-ec-wdt"
+
+union cros_ec_wdt_data {
+	struct ec_params_hang_detect req;
+	struct ec_response_hang_detect resp;
+} __packed;
+
+static int cros_ec_wdt_send_cmd(struct cros_ec_device *cros_ec,
+				union cros_ec_wdt_data *arg)
+{
+	int ret;
+	struct {
+		struct cros_ec_command msg;
+		union cros_ec_wdt_data data;
+	} __packed buf = {
+		.msg = {
+			.version = 0,
+			.command = EC_CMD_HANG_DETECT,
+			.insize  = (arg->req.command == EC_HANG_DETECT_CMD_GET_STATUS) ?
+				   sizeof(struct ec_response_hang_detect) :
+				   0,
+			.outsize = sizeof(struct ec_params_hang_detect),
+		},
+		.data.req = arg->req
+	};
+
+	ret = cros_ec_cmd_xfer_status(cros_ec, &buf.msg);
+	if (ret < 0)
+		return ret;
+
+	arg->resp = buf.data.resp;
+
+	return 0;
+}
+
+static int cros_ec_wdt_ping(struct watchdog_device *wdd)
+{
+	struct cros_ec_device *cros_ec = watchdog_get_drvdata(wdd);
+	union cros_ec_wdt_data arg;
+	int ret;
+
+	arg.req.command = EC_HANG_DETECT_CMD_RELOAD;
+	ret = cros_ec_wdt_send_cmd(cros_ec, &arg);
+	if (ret < 0)
+		dev_dbg(wdd->parent, "Failed to ping watchdog (%d)", ret);
+
+	return ret;
+}
+
+static int cros_ec_wdt_start(struct watchdog_device *wdd)
+{
+	struct cros_ec_device *cros_ec = watchdog_get_drvdata(wdd);
+	union cros_ec_wdt_data arg;
+	int ret;
+
+	/* Prepare watchdog on EC side */
+	arg.req.command = EC_HANG_DETECT_CMD_SET_TIMEOUT;
+	arg.req.reboot_timeout_sec = wdd->timeout;
+	ret = cros_ec_wdt_send_cmd(cros_ec, &arg);
+	if (ret < 0)
+		dev_dbg(wdd->parent, "Failed to start watchdog (%d)", ret);
+
+	return ret;
+}
+
+static int cros_ec_wdt_stop(struct watchdog_device *wdd)
+{
+	struct cros_ec_device *cros_ec = watchdog_get_drvdata(wdd);
+	union cros_ec_wdt_data arg;
+	int ret;
+
+	arg.req.command = EC_HANG_DETECT_CMD_CANCEL;
+	ret = cros_ec_wdt_send_cmd(cros_ec, &arg);
+	if (ret < 0)
+		dev_dbg(wdd->parent, "Failed to stop watchdog (%d)", ret);
+
+	return ret;
+}
+
+static int cros_ec_wdt_set_timeout(struct watchdog_device *wdd, unsigned int t)
+{
+	unsigned int old_timeout = wdd->timeout;
+	int ret;
+
+	wdd->timeout = t;
+	ret = cros_ec_wdt_start(wdd);
+	if (ret < 0)
+		wdd->timeout = old_timeout;
+
+	return ret;
+}
+
+static const struct watchdog_info cros_ec_wdt_ident = {
+	.options          = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
+	.firmware_version = 0,
+	.identity         = DRV_NAME,
+};
+
+static const struct watchdog_ops cros_ec_wdt_ops = {
+	.owner		 = THIS_MODULE,
+	.ping		 = cros_ec_wdt_ping,
+	.start		 = cros_ec_wdt_start,
+	.stop		 = cros_ec_wdt_stop,
+	.set_timeout = cros_ec_wdt_set_timeout,
+};
+
+static int cros_ec_wdt_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
+	struct cros_ec_device *cros_ec = ec_dev->ec_dev;
+	struct watchdog_device *wdd;
+	union cros_ec_wdt_data arg;
+	int ret = 0;
+
+	wdd = devm_kzalloc(&pdev->dev, sizeof(*wdd), GFP_KERNEL);
+	if (!wdd)
+		return -ENOMEM;
+
+	arg.req.command = EC_HANG_DETECT_CMD_GET_STATUS;
+	ret = cros_ec_wdt_send_cmd(cros_ec, &arg);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to get watchdog bootstatus");
+
+	wdd->parent = &pdev->dev;
+	wdd->info = &cros_ec_wdt_ident;
+	wdd->ops = &cros_ec_wdt_ops;
+	wdd->timeout = CROS_EC_WATCHDOG_DEFAULT_TIME;
+	wdd->min_timeout = EC_HANG_DETECT_MIN_TIMEOUT;
+	wdd->max_timeout = EC_HANG_DETECT_MAX_TIMEOUT;
+	if (arg.resp.status == EC_HANG_DETECT_AP_BOOT_EC_WDT)
+		wdd->bootstatus = WDIOF_CARDRESET;
+
+	arg.req.command = EC_HANG_DETECT_CMD_CLEAR_STATUS;
+	ret = cros_ec_wdt_send_cmd(cros_ec, &arg);
+	if (ret < 0)
+		return dev_err_probe(dev, ret, "Failed to clear watchdog bootstatus");
+
+	watchdog_stop_on_reboot(wdd);
+	watchdog_stop_on_unregister(wdd);
+	watchdog_set_drvdata(wdd, cros_ec);
+	platform_set_drvdata(pdev, wdd);
+
+	return devm_watchdog_register_device(dev, wdd);
+}
+
+static int __maybe_unused cros_ec_wdt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	struct watchdog_device *wdd = platform_get_drvdata(pdev);
+	int ret = 0;
+
+	if (watchdog_active(wdd))
+		ret = cros_ec_wdt_stop(wdd);
+
+	return ret;
+}
+
+static int __maybe_unused cros_ec_wdt_resume(struct platform_device *pdev)
+{
+	struct watchdog_device *wdd = platform_get_drvdata(pdev);
+	int ret = 0;
+
+	if (watchdog_active(wdd))
+		ret = cros_ec_wdt_start(wdd);
+
+	return ret;
+}
+
+static const struct platform_device_id cros_ec_wdt_id[] = {
+	{ DRV_NAME, 0 },
+	{}
+};
+
+static struct platform_driver cros_ec_wdt_driver = {
+	.probe		= cros_ec_wdt_probe,
+	.suspend	= pm_ptr(cros_ec_wdt_suspend),
+	.resume		= pm_ptr(cros_ec_wdt_resume),
+	.driver		= {
+		.name	= DRV_NAME,
+	},
+	.id_table	= cros_ec_wdt_id,
+};
+
+module_platform_driver(cros_ec_wdt_driver);
+
+MODULE_DEVICE_TABLE(platform, cros_ec_wdt_id);
+MODULE_DESCRIPTION("Cros EC Watchdog Device Driver");
+MODULE_LICENSE("GPL");
-- 
2.43.0.429.g432eaa2c6b-goog

Re: [PATCH v4 2/3] watchdog: Add ChromeOS EC-based watchdog driver

[Guenter Roeck]

On Fri, Jan 26, 2024 at 09:57:20AM +0000, Lukasz Majczak wrote:
> Embedded Controller (EC) present on Chromebook devices
> can be used as a watchdog.
> Implement a driver to support it.
> 
> Signed-off-by: Lukasz Majczak <lma@chromium.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

Note that this should have been patch 2/2 (since the last patch
of the series has beel applied and is no longer part of the series).

Thanks,
Guenter

Re: [PATCH v4 1/3] platform/chrome: Update binary interface for EC-based watchdog

[Guenter Roeck]

On 1/26/24 01:57, Lukasz Majczak wrote:
> Update structures and defines related to EC_CMD_HANG_DETECT
> to allow usage of new EC-based watchdog.
> 
> Signed-off-by: Lukasz Majczak <lma@chromium.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

Guenter

Re: [PATCH v4 1/3] platform/chrome: Update binary interface for EC-based watchdog

[Tzung-Bi Shih]

On Fri, Jan 26, 2024 at 09:57:19AM +0000, Lukasz Majczak wrote:
> Update structures and defines related to EC_CMD_HANG_DETECT
> to allow usage of new EC-based watchdog.
> 
> Signed-off-by: Lukasz Majczak <lma@chromium.org>

If EC_HANG_DETECT_MAX_TIMEOUT has been defined in [1] (which isn't yet):
Acked-by: Tzung-Bi Shih <tzungbi@kernel.org>

[1] https://chromium.googlesource.com/chromiumos/platform/ec/+/refs/heads/main/include/ec_commands.h#4749

[GIT PULL] Immutable branch between MFD, CROS and Watchdog due for the v6.9 merge window

[Lee Jones]

Good afternoon,

The following changes since commit 6613476e225e090cc9aad49be7fa504e290dd33d:

  Linux 6.8-rc1 (2024-01-21 14:11:32 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-cros-watchdog-v6.9

for you to fetch changes up to 843dac4d3687f7628ba4f76e1481ee3838b27a35:

  watchdog: Add ChromeOS EC-based watchdog driver (2024-02-01 11:49:30 +0000)

----------------------------------------------------------------
Immutable branch between MFD, CROS and Watchdog due for the v6.9 merge window

----------------------------------------------------------------
Lukasz Majczak (2):
      platform/chrome: Update binary interface for EC-based watchdog
      watchdog: Add ChromeOS EC-based watchdog driver

 MAINTAINERS                                    |   6 +
 drivers/watchdog/Kconfig                       |  11 ++
 drivers/watchdog/Makefile                      |   1 +
 drivers/watchdog/cros_ec_wdt.c                 | 204 +++++++++++++++++++++++++
 include/linux/platform_data/cros_ec_commands.h |  78 +++++-----
 5 files changed, 257 insertions(+), 43 deletions(-)
 create mode 100644 drivers/watchdog/cros_ec_wdt.c

-- 
Lee Jones [李琼斯]

Re: [GIT PULL] Immutable branch between MFD, CROS and Watchdog due for the v6.9 merge window

[Łukasz Majczak]

On Thu, Feb 1, 2024 at 2:06 PM Lee Jones <lee@kernel.org> wrote:
>
> Good afternoon,
>
> The following changes since commit 6613476e225e090cc9aad49be7fa504e290dd33d:
>
>   Linux 6.8-rc1 (2024-01-21 14:11:32 -0800)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-cros-watchdog-v6.9
>
> for you to fetch changes up to 843dac4d3687f7628ba4f76e1481ee3838b27a35:
>
>   watchdog: Add ChromeOS EC-based watchdog driver (2024-02-01 11:49:30 +0000)
>
> ----------------------------------------------------------------
> Immutable branch between MFD, CROS and Watchdog due for the v6.9 merge window
>
> ----------------------------------------------------------------
> Lukasz Majczak (2):
>       platform/chrome: Update binary interface for EC-based watchdog
>       watchdog: Add ChromeOS EC-based watchdog driver
>
>  MAINTAINERS                                    |   6 +
>  drivers/watchdog/Kconfig                       |  11 ++
>  drivers/watchdog/Makefile                      |   1 +
>  drivers/watchdog/cros_ec_wdt.c                 | 204 +++++++++++++++++++++++++
>  include/linux/platform_data/cros_ec_commands.h |  78 +++++-----
>  5 files changed, 257 insertions(+), 43 deletions(-)
>  create mode 100644 drivers/watchdog/cros_ec_wdt.c
>
> --
> Lee Jones [李琼斯]

Hi Lee,

I'm about to sent V5 of patches:
* watchdog: Add ChromeOS EC-based watchdog driver
* platform/chrome: Update binary interface for EC-based watchdog
but I'm not sure how I should proceed - can I base those on the master
branch or shall I rebase on top of  ib-mfd-cros-watchdog-v6.9?

Best regards,
Lukasz

Re: [GIT PULL] Immutable branch between MFD, CROS and Watchdog due for the v6.9 merge window

[Lee Jones]

On Fri, 02 Feb 2024, Łukasz Majczak wrote:

> On Thu, Feb 1, 2024 at 2:06 PM Lee Jones <lee@kernel.org> wrote:
> >
> > Good afternoon,
> >
> > The following changes since commit 6613476e225e090cc9aad49be7fa504e290dd33d:
> >
> >   Linux 6.8-rc1 (2024-01-21 14:11:32 -0800)
> >
> > are available in the Git repository at:
> >
> >   git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git ib-mfd-cros-watchdog-v6.9
> >
> > for you to fetch changes up to 843dac4d3687f7628ba4f76e1481ee3838b27a35:
> >
> >   watchdog: Add ChromeOS EC-based watchdog driver (2024-02-01 11:49:30 +0000)
> >
> > ----------------------------------------------------------------
> > Immutable branch between MFD, CROS and Watchdog due for the v6.9 merge window
> >
> > ----------------------------------------------------------------
> > Lukasz Majczak (2):
> >       platform/chrome: Update binary interface for EC-based watchdog
> >       watchdog: Add ChromeOS EC-based watchdog driver
> >
> >  MAINTAINERS                                    |   6 +
> >  drivers/watchdog/Kconfig                       |  11 ++
> >  drivers/watchdog/Makefile                      |   1 +
> >  drivers/watchdog/cros_ec_wdt.c                 | 204 +++++++++++++++++++++++++
> >  include/linux/platform_data/cros_ec_commands.h |  78 +++++-----
> >  5 files changed, 257 insertions(+), 43 deletions(-)
> >  create mode 100644 drivers/watchdog/cros_ec_wdt.c
> >
> > --
> > Lee Jones [李琼斯]
> 
> Hi Lee,
> 
> I'm about to sent V5 of patches:
> * watchdog: Add ChromeOS EC-based watchdog driver
> * platform/chrome: Update binary interface for EC-based watchdog

These patches are applied, you cannot resend them.

If you need to make adjustments, please submit incremental changes.

> but I'm not sure how I should proceed - can I base those on the master
> branch or shall I rebase on top of  ib-mfd-cros-watchdog-v6.9?

Unless it causes issues, I tend to work on Linux next.

-- 
Lee Jones [李琼斯]

Re: [PATCH v4 0/3] Introduce EC-based watchdog

[patchwork-bot+chrome-platform]

Hello:

This series was applied to chrome-platform/linux.git (for-kernelci)
by Lee Jones <lee@kernel.org>:

On Fri, 26 Jan 2024 09:57:18 +0000 you wrote:
> Chromeos devices are equipped with the embedded controller (EC)
> that can be used as a watchdog. The following patches
> updates the structures and definitions required to
> communicate with EC-based watchdog and implements the
> driver itself.
> 
> V1:https://patchwork.kernel.org/project/linux-watchdog/patch/20240117102450.4080839-1-lma@chromium.org/
> V2:https://patchwork.kernel.org/project/linux-watchdog/list/?series=817925
> V3:https://patchwork.kernel.org/project/linux-watchdog/list/?series=818036
> 
> [...]

Here is the summary with links:
  - [v4,1/3] platform/chrome: Update binary interface for EC-based watchdog
    https://git.kernel.org/chrome-platform/c/4d2ff655fb85
  - [v4,2/3] watchdog: Add ChromeOS EC-based watchdog driver
    https://git.kernel.org/chrome-platform/c/843dac4d3687

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [PATCH v4 0/3] Introduce EC-based watchdog

[patchwork-bot+chrome-platform]

Hello:

This series was applied to chrome-platform/linux.git (for-next)
by Lee Jones <lee@kernel.org>:

On Fri, 26 Jan 2024 09:57:18 +0000 you wrote:
> Chromeos devices are equipped with the embedded controller (EC)
> that can be used as a watchdog. The following patches
> updates the structures and definitions required to
> communicate with EC-based watchdog and implements the
> driver itself.
> 
> V1:https://patchwork.kernel.org/project/linux-watchdog/patch/20240117102450.4080839-1-lma@chromium.org/
> V2:https://patchwork.kernel.org/project/linux-watchdog/list/?series=817925
> V3:https://patchwork.kernel.org/project/linux-watchdog/list/?series=818036
> 
> [...]

Here is the summary with links:
  - [v4,1/3] platform/chrome: Update binary interface for EC-based watchdog
    https://git.kernel.org/chrome-platform/c/4d2ff655fb85
  - [v4,2/3] watchdog: Add ChromeOS EC-based watchdog driver
    https://git.kernel.org/chrome-platform/c/843dac4d3687

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html