[PATCH RFC 2/6] gpio: mvebu: honour EPROBE_DEFER for devm_clk_get()

From: Russell King <rmk+kernel@armlinux.org.uk>
To: Andrew Lunn <andrew@lunn.ch>,
	Bartosz Golaszewski <bgolaszewski@baylibre.com>,
	devicetree@vger.kernel.org,
	Gregory Clement <gregory.clement@bootlin.com>,
	Jason Cooper <jason@lakedaemon.net>,
	Linus Walleij <linus.walleij@linaro.org>,
	linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org,
	linux-pwm@vger.kernel.org, Mark Rutland <mark.rutland@arm.com>,
	Rob Herring <robh+dt@kernel.org>,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	Thierry Reding <thierry.reding@gmail.com>,
	"Uwe Kleine-Konig" <u.kleine-koenig@pengutronix.de>
Subject: [PATCH RFC 2/6] gpio: mvebu: honour EPROBE_DEFER for devm_clk_get()
Date: Sun, 29 Mar 2020 11:48:09 +0100	[thread overview]
Message-ID: <E1jIVU9-0005h4-QU@rmk-PC.armlinux.org.uk> (raw)
In-Reply-To: <20200329104549.GX25745@shell.armlinux.org.uk>

Honour deferred probing for devm_clk_get() so that we can get the clock
for PWM.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/gpio/gpio-mvebu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index fa5641615db6..ee13b11c5298 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -1132,6 +1132,9 @@ static int mvebu_gpio_probe(struct platform_device *pdev)
 	}
 
 	mvchip->clk = devm_clk_get(&pdev->dev, NULL);
+	if (mvchip->clk == ERR_PTR(-EPROBE_DEFER))
+		return -EPROBE_DEFER;
+
 	/* Not all SoCs require a clock.*/
 	if (!IS_ERR(mvchip->clk))
 		clk_prepare_enable(mvchip->clk);
-- 
2.20.1

