linux-kernel - [PATCH 3/4] PM / devfreq: rockchip-dfi: Fix module autoload

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Message-Id: <1476911187-11040-4-git-send-email-javier@osg.samsung.com>
Date:   Wed, 19 Oct 2016 18:06:26 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Heiko Stuebner <heiko@...ech.de>, linux-pm@...r.kernel.org,
        Chanwoo Choi <cw00.choi@...sung.com>,
        linux-rockchip@...ts.infradead.org,
        Kyungmin Park <kyungmin.park@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 3/4] PM / devfreq: rockchip-dfi: 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/devfreq/event/rockchip-dfi.ko | grep alias
$

After this patch:

$ modinfo drivers/devfreq/event/rockchip-dfi.ko | grep alias
alias:          of:N*T*Crockchip,rk3399-dfiC*
alias:          of:N*T*Crockchip,rk3399-dfi

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

 drivers/devfreq/event/rockchip-dfi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 43fcc5a7f515..22b113363ffc 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -188,6 +188,7 @@ static const struct of_device_id rockchip_dfi_id_match[] = {
 	{ .compatible = "rockchip,rk3399-dfi" },
 	{ },
 };
+MODULE_DEVICE_TABLE(of, rockchip_dfi_id_match);
 
 static int rockchip_dfi_probe(struct platform_device *pdev)
 {
-- 
2.7.4