soc: samsung: exynos-asv: don't defer early on not-supported SoCs

Check if the SoC is really supported before gathering the needed
resources. This fixes endless deferred probe on some SoCs other than
Exynos5422 (like Exynos5410).

Fixes: 5ea428595cc5 ("soc: samsung: Add Exynos Adaptive Supply Voltage driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Link: https://lore.kernel.org/r/20201207190517.262051-2-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

diff --git a/drivers/soc/samsung/exynos-asv.c b/drivers/soc/samsung/exynos-asv.c
index 8abf4dfaa5c59d72307b60c0e7fb183a53edf2a7..f653e3533f0faf0eee2040216f5c8f67d0e9d091 100644 (file)
--- a/drivers/soc/samsung/exynos-asv.c
+++ b/drivers/soc/samsung/exynos-asv.c
@@ -119,11 +119,6 @@ static int exynos_asv_probe(struct platform_device *pdev)
        u32 product_id = 0;
        int ret, i;
 
-       cpu_dev = get_cpu_device(0);
-       ret = dev_pm_opp_get_opp_count(cpu_dev);
-       if (ret < 0)
-               return -EPROBE_DEFER;
-
        asv = devm_kzalloc(&pdev->dev, sizeof(*asv), GFP_KERNEL);
        if (!asv)
                return -ENOMEM;
@@ -144,6 +139,11 @@ static int exynos_asv_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
+       cpu_dev = get_cpu_device(0);
+       ret = dev_pm_opp_get_opp_count(cpu_dev);
+       if (ret < 0)
+               return -EPROBE_DEFER;
+
        ret = of_property_read_u32(pdev->dev.of_node, "samsung,asv-bin",
                                   &asv->of_bin);
        if (ret < 0)