Hi Guenter,
Please forget this implementation of ST LPC Watchdog, Lee has
provided a new patchset. Search for "[STLinux Kernel] [PATCH 0/8] mfd:
watchdog: rtc: New driver for ST's LPC IP"
David
On 01/13/2015 03:23 PM, Guenter Roeck wrote:
On Thu, Oct 23, 2014 at 04:18:44PM +0100, Lee Jones wrote:
Signed-off-by: David Paris <david.pa...@st.com>
Signed-off-by: Lee Jones <lee.jo...@linaro.org>
Digging myself out of my hole. Sorry for the laaaate reply.
---
drivers/watchdog/Kconfig | 16 +++
drivers/watchdog/Makefile | 1 +
drivers/watchdog/st_wdt.c | 317 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 334 insertions(+)
create mode 100644 drivers/watchdog/st_wdt.c
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index f57312f..c8abf57 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -432,6 +432,22 @@ config SIRFSOC_WATCHDOG
Support for CSR SiRFprimaII and SiRFatlasVI watchdog. When
the watchdog triggers the system will be reset.
+config ST_WATCHDOG
+ tristate "STMicroelectronics LPC Watchdog"
+ depends on ARCH_STI && OF
+ depends on !RTC_DRV_ST_LPC
RTC_DRV_ST_LPC is not in mainline nor in -next. Is this still current ?
+ select WATCHDOG_CORE
+ help
+ Say Y here to include Watchdog timer support for the watchdog
+ existing in the LPC of STMicroelectronics SOCs.
+ !!! BE CARREFUL !!!
+ This driver shares hardware resources with RTC Alarm part of the
+ LPC. Both LPC Watchdog driver and LPC RTC driver cannot be
+ used together.
+
Arnd has asked if/how this is enforced by the code. Was this ever resolved ?
+ To compile this driver as a module, choose M here: the
+ module will be called st-wdt.
+
[ ... ]
+ watchdog_set_drvdata(&st_wdog_dev, st_wdog);
+ watchdog_set_nowayout(&st_wdog_dev, WATCHDOG_NOWAYOUT);
+
+ /* Init Watchdog timeout with value in DT */
+ ret = watchdog_init_timeout(&st_wdog_dev, 0, &pdev->dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to initialise watchdog timeout\n");
Missing clk_disable_unprepare().
+ return ret;
+ }
+
+ ret = watchdog_register_device(&st_wdog_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "Unable to register watchdog\n");
+ clk_disable_unprepare(clk);
+ return ret;
+ }
+
+ st_wdog_setup(st_wdog, true);
+
+ dev_info(&pdev->dev, "LPC Watchdog driver registered, reset type is %s",
+ st_wdog->warm_reset ? "warm" : "cold");
Missing newline.
Guenter
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