diff mbox

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

Message ID 1473289577-14101-1-git-send-email-zyw@rock-chips.com
State New, archived
Headers show

Commit Message

Chris Zhong Sept. 7, 2016, 11:06 p.m. UTC
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(+)

Comments

Kishon Vijay Abraham I Sept. 8, 2016, 5:24 a.m. UTC | #1
Hi,

On Thursday 08 September 2016 04:36 AM, Chris Zhong wrote:
> 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;
> +	}

phy_core will do get_sync for you if.. <see below>
> +
>  	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);

... pm_runtime_enable is invoked before phy_create.

Thanks
Kishon
diff mbox

Patch

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,