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MLK-23942-4 phy: phy-mixel-lvds: Add runtime PM support 

This patch adds runtime PM support for the Mixel LVDS PHY driver.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Sandor Yu <Sandor.yu@nxp.com>
This commit is contained in:
Liu Ying 2020-05-07 13:07:27 +08:00
parent dbbd312e31
commit 1ab2b80c66
1 changed files with 29 additions and 2 deletions
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31
drivers/phy/phy-mixel-lvds.c
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@ -1,5 +1,5 @@
/*
* Copyright 2017-2019 NXP
* Copyright 2017-2020 NXP
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
@ -81,6 +81,8 @@ void mixel_phy_lvds_set_phy_speed(struct phy *phy, unsigned long phy_clk_rate)
struct mixel_lvds_phy_priv *priv = dev_get_drvdata(phy->dev.parent);
u32 val;
phy_pm_runtime_get_sync(phy);
/* assuming NB is zero - 7bits per channel */
clk_prepare_enable(priv->phy_clk);
mutex_lock(&priv->lock);
@ -97,6 +99,8 @@ void mixel_phy_lvds_set_phy_speed(struct phy *phy, unsigned long phy_clk_rate)
clk_disable_unprepare(priv->phy_clk);
clk_set_rate(priv->phy_clk, phy_clk_rate);
phy_pm_runtime_put(phy);
}
EXPORT_SYMBOL_GPL(mixel_phy_lvds_set_phy_speed);
@ -107,6 +111,8 @@ void mixel_phy_lvds_set_hsync_pol(struct phy *phy, bool active_high)
unsigned int id = lvds_phy->id;
u32 val;
phy_pm_runtime_get_sync(phy);
clk_prepare_enable(priv->phy_clk);
mutex_lock(&priv->lock);
val = phy_read(phy, PHY_SS_CTRL);
@ -116,6 +122,8 @@ void mixel_phy_lvds_set_hsync_pol(struct phy *phy, bool active_high)
phy_write(phy, PHY_SS_CTRL, val);
mutex_unlock(&priv->lock);
clk_disable_unprepare(priv->phy_clk);
phy_pm_runtime_put(phy);
}
EXPORT_SYMBOL_GPL(mixel_phy_lvds_set_hsync_pol);
@ -126,6 +134,8 @@ void mixel_phy_lvds_set_vsync_pol(struct phy *phy, bool active_high)
unsigned int id = lvds_phy->id;
u32 val;
phy_pm_runtime_get_sync(phy);
clk_prepare_enable(priv->phy_clk);
mutex_lock(&priv->lock);
val = phy_read(phy, PHY_SS_CTRL);
@ -135,6 +145,8 @@ void mixel_phy_lvds_set_vsync_pol(struct phy *phy, bool active_high)
phy_write(phy, PHY_SS_CTRL, val);
mutex_unlock(&priv->lock);
clk_disable_unprepare(priv->phy_clk);
phy_pm_runtime_put(phy);
}
EXPORT_SYMBOL_GPL(mixel_phy_lvds_set_vsync_pol);
@ -233,6 +245,8 @@ static int mixel_lvds_phy_probe(struct platform_device *pdev)
mutex_init(&priv->lock);
dev_set_drvdata(dev, priv);
pm_runtime_enable(dev);
for_each_available_child_of_node(np, child) {
if (of_property_read_u32(child, "reg", &phy_id)) {
dev_err(dev, "missing reg property in node %s\n",
@ -274,14 +288,26 @@ static int mixel_lvds_phy_probe(struct platform_device *pdev)
}
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
if (IS_ERR(phy_provider)) {
pm_runtime_disable(dev);
return PTR_ERR(phy_provider);
}
return PTR_ERR_OR_ZERO(phy_provider);
return 0;
put_child:
of_node_put(child);
pm_runtime_disable(dev);
return ret;
}
static int mixel_lvds_phy_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
return 0;
}
static const struct of_device_id mixel_lvds_phy_of_match[] = {
{ .compatible = "mixel,lvds-phy" },
{}
@ -290,6 +316,7 @@ MODULE_DEVICE_TABLE(of, mixel_lvds_phy_of_match);
static struct platform_driver mixel_lvds_phy_driver = {
.probe = mixel_lvds_phy_probe,
.remove = mixel_lvds_phy_remove,
.driver = {
.name = "mixel-lvds-phy",
.of_match_table = mixel_lvds_phy_of_match,