[PATCH 1/3] watchdog: qcom: use timer devicetree binding

Mathieu Olivari
2015-02-21T02:21:07Z

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>
---
drivers/watchdog/qcom-wdt.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index aa85618..aa03ca8 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);
--
1.9.1