linux-kernel - [PATCH] iio: adc: imx25-gcq: Fix module autoload

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Message-Id: <1483361146-913-1-git-send-email-javier@osg.samsung.com>
Date:   Mon,  2 Jan 2017 09:45:45 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Arnd Bergmann <arnd@...db.de>, linux-iio@...r.kernel.org,
        Hartmut Knaack <knaack.h@....de>,
        Markus Pargmann <mpa@...gutronix.de>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Lee Jones <lee.jones@...aro.org>,
        Jonathan Cameron <jic23@...nel.org>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Denis Carikli <denis@...rea.com>
Subject: [PATCH] iio: adc: imx25-gcq: Fix module autoload

If the driver is built as a module, autoload won't work because the module
alias information is not filled. So user-space can't match the registered
device with the corresponding module.

Export the module alias information using the MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/iio/adc/fsl-imx25-gcq.ko | grep alias
$

After this patch:

$ modinfo drivers/iio/adc/fsl-imx25-gcq.ko | grep alias
alias:          of:N*T*Cfsl,imx25-gcqC*
alias:          of:N*T*Cfsl,imx25-gcq

Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
---

 drivers/iio/adc/fsl-imx25-gcq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c
index 72b32c1ab257..ea264fa9e567 100644
--- a/drivers/iio/adc/fsl-imx25-gcq.c
+++ b/drivers/iio/adc/fsl-imx25-gcq.c
@@ -401,6 +401,7 @@ static const struct of_device_id mx25_gcq_ids[] = {
 	{ .compatible = "fsl,imx25-gcq", },
 	{ /* Sentinel */ }
 };
+MODULE_DEVICE_TABLE(of, mx25_gcq_ids);
 
 static struct platform_driver mx25_gcq_driver = {
 	.driver		= {
-- 
2.7.4