hwrng: exynos - Add Device Tree support

Add Device Tree support for the driver. The Pseudo Random Number
Generator module is the same in almost all of Exynos SoCs, since
Exynos4210 (however the tests were done only on Trats2 board with
Exynos4412). There are some differences on newer Exynos Octa
(Exynos542x) SoCs.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index dc06c78bc1d702cafebb6393b11f7023313c3a38..30cf4623184fbdc39387d5448cd5b4e281754053 100644 (file)
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -188,10 +188,19 @@ static const struct dev_pm_ops exynos_rng_pm_ops = {
                           exynos_rng_runtime_resume, NULL)
 };
 
+static const struct of_device_id exynos_rng_dt_match[] = {
+       {
+               .compatible = "samsung,exynos4-rng",
+       },
+       { },
+};
+MODULE_DEVICE_TABLE(of, exynos_rng_dt_match);
+
 static struct platform_driver exynos_rng_driver = {
        .driver         = {
                .name   = "exynos-rng",
                .pm     = &exynos_rng_pm_ops,
+               .of_match_table = exynos_rng_dt_match,
        },
        .probe          = exynos_rng_probe,
 };