[PATCH] watchdog: qcom-wdt: disable pretimeout on timer platform

Ansuel Smith
2020-02-04T18:45:22Z

Some platform like ipq806x doesn't support pretimeout and define
some interrupts used by qcom,msm-timer. Change the driver to check
and use pretimeout only on qcom,kpss-wdt as it's the only platform
that actually supports it.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/watchdog/qcom-wdt.c | 31 +++++++++++++++++++++++--------
1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c
index a494543d3ae1..195fe49ca32e 100644
--- a/drivers/watchdog/qcom-wdt.c
+++ b/drivers/watchdog/qcom-wdt.c
@@ -40,6 +40,11 @@ static const u32 reg_offset_data_kpss[] = {
[WDT_BITE_TIME] = 0x14,
};

+struct qcom_wdt_match_data {
+ const u32 *offset;
+ bool pretimeout;
+};
+
struct qcom_wdt {
struct watchdog_device wdd;
unsigned long rate;
@@ -179,19 +184,29 @@ static void qcom_clk_disable_unprepare(void *data)
clk_disable_unprepare(data);
}

+static const struct qcom_wdt_match_data match_data_apcs_tmr = {
+ .offset = reg_offset_data_apcs_tmr,
+ .pretimeout = false,
+};
+
+static const struct qcom_wdt_match_data match_data_kpss = {
+ .offset = reg_offset_data_kpss,
+ .pretimeout = true,
+};
+
static int qcom_wdt_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct qcom_wdt *wdt;
struct resource *res;
struct device_node *np = dev->of_node;
- const u32 *regs;
+ const struct qcom_wdt_match_data *data;
u32 percpu_offset;
int irq, ret;
struct clk *clk;

- regs = of_device_get_match_data(dev);
- if (!regs) {
+ data = of_device_get_match_data(dev);
+ if (!data && !data->offset) {
dev_err(dev, "Unsupported QCOM WDT module\n");
return -ENODEV;
}
@@ -247,7 +262,7 @@ static int qcom_wdt_probe(struct platform_device *pdev)

/* check if there is pretimeout support */
irq = platform_get_irq(pdev, 0);
- if (irq > 0) {
+ if (data->pretimeout && irq > 0) {
ret = devm_request_irq(dev, irq, qcom_wdt_isr,
IRQF_TRIGGER_RISING,
"wdt_bark", &wdt->wdd);
@@ -267,7 +282,7 @@ static int qcom_wdt_probe(struct platform_device *pdev)
wdt->wdd.min_timeout = 1;
wdt->wdd.max_timeout = 0x10000000U / wdt->rate;
wdt->wdd.parent = dev;
- wdt->layout = regs;
+ wdt->layout = data->offset;

if (readl(wdt_addr(wdt, WDT_STS)) & 1)
wdt->wdd.bootstatus = WDIOF_CARDRESET;
@@ -311,9 +326,9 @@ static int __maybe_unused qcom_wdt_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(qcom_wdt_pm_ops, qcom_wdt_suspend, qcom_wdt_resume);

static const struct of_device_id qcom_wdt_of_table[] = {
- { .compatible = "qcom,kpss-timer", .data = reg_offset_data_apcs_tmr },
- { .compatible = "qcom,scss-timer", .data = reg_offset_data_apcs_tmr },
- { .compatible = "qcom,kpss-wdt", .data = reg_offset_data_kpss },
+ { .compatible = "qcom,kpss-timer", .data = &match_data_apcs_tmr },
+ { .compatible = "qcom,scss-timer", .data = &match_data_apcs_tmr },
+ { .compatible = "qcom,kpss-wdt", .data = &match_data_kpss },
{ },
};
MODULE_DEVICE_TABLE(of, qcom_wdt_of_table);
--
2.24.0