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watchdog: davinci: add support for deferred probing 

devm_clk_get can fail with EPROBE_DEFER in case the clock provider is
not ready yet. Handle this case gracefully, rather than dumping out
a huge warning.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Tero Kristo 2016-11-24 14:58:28 +02:00 committed by Guenter Roeck
parent 807f0b2d22
commit 9b38657495
1 changed files with 5 additions and 1 deletions
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6
drivers/watchdog/davinci_wdt.c
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@ -166,8 +166,12 @@ static int davinci_wdt_probe(struct platform_device *pdev)
return -ENOMEM;
davinci_wdt->clk = devm_clk_get(dev, NULL);
if (WARN_ON(IS_ERR(davinci_wdt->clk)))
if (IS_ERR(davinci_wdt->clk)) {
if (PTR_ERR(davinci_wdt->clk) != -EPROBE_DEFER)
dev_err(&pdev->dev, "failed to get clock node\n");
return PTR_ERR(davinci_wdt->clk);
}
clk_prepare_enable(davinci_wdt->clk);