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watchdog: qcom-wdt: disable pretimeout on timer platform 

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>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200204195648.23350-1-ansuelsmth@gmail.com
[groeck: Conflict resolution]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Ansuel Smith 2020-02-04 20:56:48 +01:00 committed by Wim Van Sebroeck
parent fb33c6510d
commit 000de54171
1 changed files with 23 additions and 8 deletions
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31
drivers/watchdog/qcom-wdt.c
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@ -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) {
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_optional(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);