linux-kernel - [PATCH 1/2] Input: fsl-imx25-tcq - fix module autoload when registered via OF

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Message-Id: <1476460819-12809-1-git-send-email-javier@osg.samsung.com>
Date:   Fri, 14 Oct 2016 13:00:18 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Juergen Borleis <jbe@...gutronix.de>,
        linux-input@...r.kernel.org, Markus Pargmann <mpa@...gutronix.de>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Denis Carikli <denis@...rea.com>
Subject: [PATCH 1/2] Input: fsl-imx25-tcq - fix module autoload when registered via OF

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/input/touchscreen/fsl-imx25-tcq.ko | grep alias

After this patch:

$ modinfo drivers/input/touchscreen/fsl-imx25-tcq.ko | grep alias
alias:          of:N*T*Cfsl,imx25-tcqC*
alias:          of:N*T*Cfsl,imx25-tcq

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

 drivers/input/touchscreen/fsl-imx25-tcq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/input/touchscreen/fsl-imx25-tcq.c b/drivers/input/touchscreen/fsl-imx25-tcq.c
index fe9877a6af9e..d50ee490c9cc 100644
--- a/drivers/input/touchscreen/fsl-imx25-tcq.c
+++ b/drivers/input/touchscreen/fsl-imx25-tcq.c
@@ -55,6 +55,7 @@ static const struct of_device_id mx25_tcq_ids[] = {
 	{ .compatible = "fsl,imx25-tcq", },
 	{ /* Sentinel */ }
 };
+MODULE_DEVICE_TABLE(of, mx25_tcq_ids);
 
 #define TSC_4WIRE_PRE_INDEX 0
 #define TSC_4WIRE_X_INDEX 1
-- 
2.7.4