linux-kernel - [PATCH] staging: typec: fusb302: Fix module autoload

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Message-Id: <20170504063345.21320-1-javier@dowhile0.org>
Date:   Thu,  4 May 2017 08:33:45 +0200
From:   Javier Martinez Canillas <javier@...hile0.org>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@...hile0.org>,
        devel@...verdev.osuosl.org, Guenter Roeck <linux@...ck-us.net>,
        Yueyao Zhu <yueyao@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: [PATCH] staging: typec: fusb302: 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 OF and I2C device ID table entries as module aliases, using the
MODULE_DEVICE_TABLE() macro.

Before this patch:

$ modinfo drivers/staging/typec/fusb302/fusb302.ko | grep alias
$

After this patch:

$ modinfo drivers/staging/typec/fusb302/fusb302.ko | grep alias
alias:          of:N*T*Cfcs,fusb302C*
alias:          of:N*T*Cfcs,fusb302
alias:          i2c:typec_fusb302

Signed-off-by: Javier Martinez Canillas <javier@...hile0.org>
---

 drivers/staging/typec/fusb302/fusb302.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/staging/typec/fusb302/fusb302.c b/drivers/staging/typec/fusb302/fusb302.c
index 2cee9a952c9b..aa460f93a293 100644
--- a/drivers/staging/typec/fusb302/fusb302.c
+++ b/drivers/staging/typec/fusb302/fusb302.c
@@ -1787,11 +1787,13 @@ static const struct of_device_id fusb302_dt_match[] = {
 	{.compatible = "fcs,fusb302"},
 	{},
 };
+MODULE_DEVICE_TABLE(of, fusb302_dt_match);
 
 static const struct i2c_device_id fusb302_i2c_device_id[] = {
 	{"typec_fusb302", 0},
 	{},
 };
+MODULE_DEVICE_TABLE(i2c, fusb302_i2c_device_id);
 
 static const struct dev_pm_ops fusb302_pm_ops = {
 	.suspend = fusb302_pm_suspend,
-- 
2.9.3