linux-kernel - [PATCH 1/2] mfd: fsl-imx25-tsadc: Fix module autoload when registered via OF

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Message-Id: <1476459651-3897-1-git-send-email-javier@osg.samsung.com>
Date:   Fri, 14 Oct 2016 12:40:50 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 1/2] mfd: fsl-imx25-tsadc: 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/mfd/fsl-imx25-tsadc.ko | grep alias
alias:          platform:mx25-tsadc

After this patch:

$ modinfo drivers/mfd/fsl-imx25-tsadc.ko | grep alias
alias:          platform:mx25-tsadc
alias:          of:N*T*Cfsl,imx25-tsadcC*
alias:          of:N*T*Cfsl,imx25-tsadc

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

 drivers/mfd/fsl-imx25-tsadc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/fsl-imx25-tsadc.c b/drivers/mfd/fsl-imx25-tsadc.c
index 77b2675cf8f5..ac430a396a89 100644
--- a/drivers/mfd/fsl-imx25-tsadc.c
+++ b/drivers/mfd/fsl-imx25-tsadc.c
@@ -187,6 +187,7 @@ static const struct of_device_id mx25_tsadc_ids[] = {
 	{ .compatible = "fsl,imx25-tsadc" },
 	{ /* Sentinel */ }
 };
+MODULE_DEVICE_TABLE(of, mx25_tsadc_ids);
 
 static struct platform_driver mx25_tsadc_driver = {
 	.driver = {
-- 
2.7.4