Commit a329bbe7 authored Feb 23, 2019 by Anson Huang Committed by Linus Walleij Feb 25, 2019

gpio: mxc: add check to return defer probe if clock tree NOT ready



On i.MX8MQ platform, clock driver uses platform driver
model and it is probed after GPIO driver, so when GPIO
driver fails to get clock, it should check the error type
to decide whether to return defer probe or just ignore
the clock operation.

Fixes: 2808801a ("gpio: mxc: add clock operation")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

parent af39459b

drivers/gpio/gpio-mxc.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -438,8 +438,11 @@ static int mxc_gpio_probe(struct platform_device *pdev)

		/* the controller clock is optional */
		port->clk = devm_clk_get(&pdev->dev, NULL);
		if (IS_ERR(port->clk))
		if (IS_ERR(port->clk)) {
		if (PTR_ERR(port->clk) == -EPROBE_DEFER)
		return -EPROBE_DEFER;
		port->clk = NULL;
		}

		err = clk_prepare_enable(port->clk);
		if (err) {

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