Messages in this thread Patch in this message | | | From | Christopher Bostic <> | Subject | [PATCH 2/2] drivers/watchdog: ASPEED reference dev tree properties for config | Date | Tue, 13 Jun 2017 15:38:18 -0500 |
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Reference the system device tree when configuring the watchdog. Configure for external signal generation if optional attribute 'external-signal' is present in device tree. Configure for reset system after timeout if the optional attribute 'no-system-reset' is not present. Disabling system reset may be required in situations where one of the other watchdogs in the systems is responsible for this.
Signed-off-by: Christopher Bostic <cbostic@linux.vnet.ibm.com> --- drivers/watchdog/aspeed_wdt.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/watchdog/aspeed_wdt.c b/drivers/watchdog/aspeed_wdt.c index 1c65258..9deb4be 100644 --- a/drivers/watchdog/aspeed_wdt.c +++ b/drivers/watchdog/aspeed_wdt.c @@ -140,6 +140,7 @@ static int aspeed_wdt_probe(struct platform_device *pdev) { struct aspeed_wdt *wdt; struct resource *res; + struct device_node *np; int ret; wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL); @@ -170,8 +171,16 @@ static int aspeed_wdt_probe(struct platform_device *pdev) * the SOC and not the full chip */ wdt->ctrl = WDT_CTRL_RESET_MODE_SOC | - WDT_CTRL_1MHZ_CLK | - WDT_CTRL_RESET_SYSTEM; + WDT_CTRL_1MHZ_CLK; + + np = pdev->dev.of_node; + if (np && !of_get_property(np, "no-system-reset", NULL)) + wdt->ctrl |= WDT_CTRL_RESET_SYSTEM; + + if (np && of_get_property(np, "external-signal", NULL)) + wdt->ctrl |= WDT_CTRL_WDT_EXT; + + writel(wdt->ctrl, wdt->base + WDT_CTRL); if (readl(wdt->base + WDT_CTRL) & WDT_CTRL_ENABLE) { aspeed_wdt_start(&wdt->wdd); -- 1.8.2.2
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