watchdog: qcom: use timer devicetree binding

MSM watchdog configuration happens in the same register block as the
timer, so we'll use the same binding as the existing timer.

The qcom-wdt will now be probed when devicetree has an entry compatible
with "qcom,kpss-timer" or "qcom-scss-timer".

Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 15 insertions, 6 deletions

diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index aa85618c4d03..aa03ca8f2d9b 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -20,9 +20,9 @@
 #include <linux/reboot.h>
 #include <linux/watchdog.h>
 
-#define WDT_RST         0x0
-#define WDT_EN          0x8
-#define WDT_BITE_TIME   0x24
+#define WDT_RST         0x38
+#define WDT_EN          0x40
+#define WDT_BITE_TIME   0x5C
 
 struct qcom_wdt {
         struct watchdog_device  wdd;
@@ -117,6 +117,8 @@ static int qcom_wdt_probe(struct platform_device *pdev)
 {
         struct qcom_wdt *wdt;
         struct resource *res;
+        struct device_node *np = pdev->dev.of_node;
+        u32 percpu_offset;
         int ret;
 
         wdt = devm_kzalloc(&pdev->dev, sizeof(*wdt), GFP_KERNEL);
@@ -124,6 +126,14 @@ static int qcom_wdt_probe(struct platform_device *pdev)
                 return -ENOMEM;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+        /* We use CPU0's DGT for the watchdog */
+        if (of_property_read_u32(np, "cpu-offset", &percpu_offset))
+                percpu_offset = 0;
+
+        res->start += percpu_offset;
+        res->end += percpu_offset;
+
         wdt->base = devm_ioremap_resource(&pdev->dev, res);
         if (IS_ERR(wdt->base))
                 return PTR_ERR(wdt->base);
@@ -203,9 +213,8 @@ static int qcom_wdt_remove(struct platform_device *pdev)
 }
 
 static const struct of_device_id qcom_wdt_of_table[] = {
-        { .compatible = "qcom,kpss-wdt-msm8960", },
-        { .compatible = "qcom,kpss-wdt-apq8064", },
-        { .compatible = "qcom,kpss-wdt-ipq8064", },
+        { .compatible = "qcom,kpss-timer" },
+        { .compatible = "qcom,scss-timer" },
         { },
 };
 MODULE_DEVICE_TABLE(of, qcom_wdt_of_table);