[PATCH 1/3] cpuidle: exynos: Allow to use the driver without AFTR

[Krzysztof Kozlowski]

Allow the driver to be used when AFTR enter function is not provided
(device platform data is NULL).

This actually does not give any special energy-saving benefits but
allows to track the idle time of each core. Additionally it is a safe
way to validate supplied platform data.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
 drivers/cpuidle/cpuidle-exynos.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/cpuidle/cpuidle-exynos.c b/drivers/cpuidle/cpuidle-exynos.c
index 7c0151263828..5325a394be7e 100644
--- a/drivers/cpuidle/cpuidle-exynos.c
+++ b/drivers/cpuidle/cpuidle-exynos.c
@@ -77,7 +77,10 @@ static int exynos_cpuidle_probe(struct platform_device *pdev)
 {
 	int ret;
 
+	/* If NULL enter only WFI */
 	exynos_enter_aftr = (void *)(pdev->dev.platform_data);
+	if (!exynos_enter_aftr)
+		exynos_idle_driver.state_count = 1;
 
 	ret = cpuidle_register(&exynos_idle_driver, NULL);
 	if (ret) {
-- 
1.9.1

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