[PATCH v2 1/2] phy: rockchip-typec: add pm runtime support

Chris Zhong
2016-09-07T23:06:32Z

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 <zyw@rock-chips.com>
---

Changes in v2:
-- add pm_runtime_put_sync in err case

drivers/phy/phy-rockchip-typec.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/drivers/phy/phy-rockchip-typec.c b/drivers/phy/phy-rockchip-typec.c
index fb58a27..0b2f528 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);
@@ -600,8 +606,10 @@ static int tcphy_phy_init(struct rockchip_typec_phy *tcphy, u8 mode)
return 0;

err_wait_pma:
+ pm_runtime_put_sync(tcphy->dev);
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 +618,7 @@ 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 +996,15 @@ 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 +1017,7 @@ 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