linux-kernel - [PATCH 2/4] i2c: xlp9xx: Fix module autoload

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Message-Id: <1476824508-4679-3-git-send-email-javier@osg.samsung.com>
Date:   Tue, 18 Oct 2016 18:01:46 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org
Subject: [PATCH 2/4] i2c: xlp9xx: 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/i2c/busses/i2c-xlp9xx.ko | grep alias
$

After this patch:

$ modinfo drivers/i2c/busses/i2c-xlp9xx.ko | grep alias
alias:          of:N*T*Cnetlogic,xlp980-i2cC*
alias:          of:N*T*Cnetlogic,xlp980-i2c

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

 drivers/i2c/busses/i2c-xlp9xx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-xlp9xx.c b/drivers/i2c/busses/i2c-xlp9xx.c
index 2a972ed7aa0d..e29ff37a43bd 100644
--- a/drivers/i2c/busses/i2c-xlp9xx.c
+++ b/drivers/i2c/busses/i2c-xlp9xx.c
@@ -426,6 +426,7 @@ static const struct of_device_id xlp9xx_i2c_of_match[] = {
 	{ .compatible = "netlogic,xlp980-i2c", },
 	{ /* sentinel */ },
 };
+MODULE_DEVICE_TABLE(of, xlp9xx_i2c_of_match);
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id xlp9xx_i2c_acpi_ids[] = {
-- 
2.7.4