RK3368 MCU: add MCU suspend and resume function

[firefly-linux-kernel-4.4.55.git] / drivers / devfreq / ddr_rk3368.c

diff --git a/drivers/devfreq/ddr_rk3368.c b/drivers/devfreq/ddr_rk3368.c
index d7ed33cd8d3a4bbb07bf3c73fbabfc0baf1c7d19..56d3b679475f0c3359bb18aa0530a5b5d3a15338 100644 (file)
--- a/drivers/devfreq/ddr_rk3368.c
+++ b/drivers/devfreq/ddr_rk3368.c
@@ -257,6 +257,12 @@ static void ddr_init(u32 dram_speed_bin, u32 freq)
                printk(KERN_DEBUG pr_fmt("%s out\n"), __func__);
 }
 
+static int ddr_init_resume(struct platform_device *pdev)
+{
+       ddr_init(DDR3_DEFAULT, 0);
+       return 0;
+}
+
 static int __init rockchip_ddr_probe(struct platform_device *pdev)
 {
        struct device_node *np;
@@ -311,6 +317,9 @@ static const struct of_device_id rockchip_ddr_of_match[] __refdata = {
 };
 
 static struct platform_driver rockchip_ddr_driver = {
+#ifdef CONFIG_PM
+       .resume = ddr_init_resume,
+#endif /* CONFIG_PM */
        .driver = {
                   .name = "rockchip_ddr",
                   .of_match_table = rockchip_ddr_of_match,