linux-kernel - [PATCH v2] clk: samsung: clk-exynos-audss: Fix module autoload

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Date:   Sun, 16 Oct 2016 10:45:07 -0300
From:   Javier Martinez Canillas <javier@....samsung.com>
To:     linux-kernel@...r.kernel.org
Cc:     Javier Martinez Canillas <javier@....samsung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        linux-clk@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2] clk: samsung: clk-exynos-audss: 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/clk/samsung/clk-exynos-audss.ko | grep alias
alias:          platform:exynos-audss-clk

After this patch:

$ modinfo drivers/clk/samsung/clk-exynos-audss.ko | grep alias
alias:          platform:exynos-audss-clk
alias:          of:N*T*Csamsung,exynos5420-audss-clockC*
alias:          of:N*T*Csamsung,exynos5420-audss-clock
alias:          of:N*T*Csamsung,exynos5410-audss-clockC*
alias:          of:N*T*Csamsung,exynos5410-audss-clock
alias:          of:N*T*Csamsung,exynos5250-audss-clockC*
alias:          of:N*T*Csamsung,exynos5250-audss-clock
alias:          of:N*T*Csamsung,exynos4210-audss-clockC*
alias:          of:N*T*Csamsung,exynos4210-audss-clock

Fixes: 4d252fd5719b ("clk: samsung: Allow modular build of the Audio Subsystem CLKCON driver")
Signed-off-by: Javier Martinez Canillas <javier@....samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
Tested-by: Krzysztof Kozlowski <krzk@...nel.org>

---

Changes in v2:
- Add fixes tag. Suggested by Krzysztof Kozlowski.
- Add Krzysztof Kozlowski's Reviewed-by and Tested-by tags.

 drivers/clk/samsung/clk-exynos-audss.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/samsung/clk-exynos-audss.c b/drivers/clk/samsung/clk-exynos-audss.c
index 51d152f735cc..17e68a724945 100644
--- a/drivers/clk/samsung/clk-exynos-audss.c
+++ b/drivers/clk/samsung/clk-exynos-audss.c
@@ -106,6 +106,7 @@ static const struct of_device_id exynos_audss_clk_of_match[] = {
 	},
 	{ },
 };
+MODULE_DEVICE_TABLE(of, exynos_audss_clk_of_match);
 
 static void exynos_audss_clk_teardown(void)
 {
-- 
2.7.4