[PATCH] phy: rockchip-typec: add pm runtime support

[Chris Zhong]

Adds pm_runtime support for rockchip Type-C, so that power domain is
enabled only when there is a transaction going on to help save power.

Signed-off-by: Chris Zhong <z...@rock-chips.com>
---

 drivers/phy/phy-rockchip-typec.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/phy/phy-rockchip-typec.c b/drivers/phy/phy-rockchip-typec.c
index fb58a27..e1a07aa 100644
--- a/drivers/phy/phy-rockchip-typec.c
+++ b/drivers/phy/phy-rockchip-typec.c
@@ -552,6 +552,12 @@ static int tcphy_phy_init(struct rockchip_typec_phy 
*tcphy, u8 mode)
                goto err_clk_core;
        }
 
+       ret = pm_runtime_get_sync(tcphy->dev);
+       if (ret < 0) {
+               dev_err(tcphy->dev, "cannot get pm runtime %d\n", ret);
+               goto err_clk_ref;
+       }
+
        reset_control_deassert(tcphy->tcphy_rst);
 
        property_enable(tcphy, &cfg->typec_conn_dir, tcphy->flip);
@@ -602,6 +608,7 @@ static int tcphy_phy_init(struct rockchip_typec_phy *tcphy, 
u8 mode)
 err_wait_pma:
        reset_control_assert(tcphy->uphy_rst);
        reset_control_assert(tcphy->tcphy_rst);
+err_clk_ref:
        clk_disable_unprepare(tcphy->clk_ref);
 err_clk_core:
        clk_disable_unprepare(tcphy->clk_core);
@@ -610,6 +617,7 @@ err_clk_core:
 
 static void tcphy_phy_deinit(struct rockchip_typec_phy *tcphy)
 {
+       pm_runtime_put_sync(tcphy->dev);
        reset_control_assert(tcphy->tcphy_rst);
        reset_control_assert(tcphy->uphy_rst);
        reset_control_assert(tcphy->pipe_rst);
@@ -987,6 +995,15 @@ static int rockchip_typec_phy_probe(struct platform_device 
*pdev)
                return PTR_ERR(phy_provider);
        }
 
+       pm_runtime_enable(dev);
+
+       return 0;
+}
+
+static int rockchip_typec_phy_remove(struct platform_device *pdev)
+{
+       pm_runtime_disable(&pdev->dev);
+
        return 0;
 }
 
@@ -999,6 +1016,7 @@ MODULE_DEVICE_TABLE(of, rockchip_typec_phy_dt_ids);
 
 static struct platform_driver rockchip_typec_phy_driver = {
        .probe          = rockchip_typec_phy_probe,
+       .remove         = rockchip_typec_phy_remove,
        .driver         = {
                .name   = "rockchip-typec-phy",
                .of_match_table = rockchip_typec_phy_dt_ids,
-- 
1.9.1