Commit b51247c8 authored Jul 19, 2017 by Wolfram Sang Committed by Wim Van Sebroeck Sep 09, 2017

watchdog: renesas_wdt: check rate also for upper limit



When checking the clock rate, ensure also that counting all 16 bits
takes at least one second to match the granularity of the framework.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

parent f6159dd4

drivers/watchdog/renesas_wdt.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -134,14 +134,14 @@ static int rwdt_probe(struct platform_device *pdev)

		for (i = ARRAY_SIZE(clk_divs) - 1; i >= 0; i--) {
		clks_per_sec = DIV_ROUND_UP(rate, clk_divs[i]);
		if (clks_per_sec) {
		if (clks_per_sec && clks_per_sec < 65536) {
		priv->clks_per_sec = clks_per_sec;
		priv->cks = i;
		break;
		}
		}

		if (!clks_per_sec) {
		if (i < 0) {
		dev_err(&pdev->dev, "Can't find suitable clock divider\n");
		return -ERANGE;
		}