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phy: fsl-imx8mq-usb: add support for VBUS power control 

This adds support to the PHY driver to power up/down the VBUS
voltage rail at the appropriate times.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Lucas Stach 2019-04-04 18:41:48 +02:00 committed by Kishon Vijay Abraham I
parent 29c6584f33
commit eeda879bb5
1 changed files with 12 additions and 0 deletions
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12
drivers/phy/freescale/phy-fsl-imx8mq-usb.c
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@ -6,6 +6,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/phy/phy.h> #include <linux/phy/phy.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#define PHY_CTRL0 0x0 #define PHY_CTRL0 0x0
#define PHY_CTRL0_REF_SSP_EN BIT(2) #define PHY_CTRL0_REF_SSP_EN BIT(2)
@ -24,6 +25,7 @@ struct imx8mq_usb_phy {
struct phy *phy; struct phy *phy;
struct clk *clk; struct clk *clk;
void __iomem *base; void __iomem *base;
struct regulator *vbus;
}; };
static int imx8mq_usb_phy_init(struct phy *phy) static int imx8mq_usb_phy_init(struct phy *phy)
@ -55,6 +57,11 @@ static int imx8mq_usb_phy_init(struct phy *phy)
static int imx8mq_phy_power_on(struct phy *phy) static int imx8mq_phy_power_on(struct phy *phy)
{ {
struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
int ret;
ret = regulator_enable(imx_phy->vbus);
if (ret)
return ret;
return clk_prepare_enable(imx_phy->clk); return clk_prepare_enable(imx_phy->clk);
} }
@ -64,6 +71,7 @@ static int imx8mq_phy_power_off(struct phy *phy)
struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy); struct imx8mq_usb_phy *imx_phy = phy_get_drvdata(phy);
clk_disable_unprepare(imx_phy->clk); clk_disable_unprepare(imx_phy->clk);
regulator_disable(imx_phy->vbus);
return 0; return 0;
} }
@ -101,6 +109,10 @@ static int imx8mq_usb_phy_probe(struct platform_device *pdev)
if (IS_ERR(imx_phy->phy)) if (IS_ERR(imx_phy->phy))
return PTR_ERR(imx_phy->phy); return PTR_ERR(imx_phy->phy);
imx_phy->vbus = devm_regulator_get(dev, "vbus");
if (IS_ERR(imx_phy->vbus))
return PTR_ERR(imx_phy->vbus);
phy_set_drvdata(imx_phy->phy, imx_phy); phy_set_drvdata(imx_phy->phy, imx_phy);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate); phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);