linux-kernel - [PATCH 1/2] i2c-mux-gpio: use deferred probing with the device tree

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Date:	Tue, 08 Oct 2013 15:51:50 +0200
From:	Ionut Nicu <ioan.nicu.ext@....com>
To:	Peter Korsgaard <peter.korsgaard@...co.com>
CC:	Wolfram Sang <wsa@...-dreams.de>,
	Alexander Sverdlin <alexander.sverdlin@....com>,
	linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] i2c-mux-gpio: use deferred probing with the device tree

If the i2c-parent bus driver is not loaded, returning
-EINVAL will force people to unload and then reload the
module again to get it working.

Signed-off-by: Ionut Nicu <ioan.nicu.ext@....com>
---
 drivers/i2c/muxes/i2c-mux-gpio.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-mux-gpio.c b/drivers/i2c/muxes/i2c-mux-gpio.c
index 5d4a99b..eb99f04 100644
--- a/drivers/i2c/muxes/i2c-mux-gpio.c
+++ b/drivers/i2c/muxes/i2c-mux-gpio.c
@@ -79,7 +79,7 @@ static int i2c_mux_gpio_probe_dt(struct gpiomux *mux,
 	adapter = of_find_i2c_adapter_by_node(adapter_np);
 	if (!adapter) {
 		dev_err(&pdev->dev, "Cannot find parent bus\n");
-		return -ENODEV;
+		return -EPROBE_DEFER;
 	}
 	mux->data.parent = i2c_adapter_id(adapter);
 	put_device(&adapter->dev);
-- 
1.7.1
--
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