Commit 9955a783 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I
Browse files

phy: omap-usb2: use *syscon* framework API to power on/off the PHY 



Deprecate using phy-omap-control driver to power on/off the PHY,
and use *syscon* framework to do the same. This handles
powering on/off the PHY for the USB2 PHYs used in various TI SoCs.

Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
parent 86c574e4

Documentation/devicetree/bindings/phy/ti-phy.txt

+7 −1
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ OMAP USB2 PHY 


Required properties:

 - compatible: Should be "ti,omap-usb2"

	       Should be "ti,dra7x-usb2-phy2" for the 2nd instance of USB2 PHY

	       in DRA7x

 - reg : Address and length of the register set for the device.

 - #phy-cells: determine the number of cells that should be given in the

   phandle while referencing this phy.
@@ -40,10 +42,14 @@ Required properties: 
   * "wkupclk" - wakeup clock.

   * "refclk" - reference clock (optional).



Optional properties:

Deprecated properties:

 - ctrl-module : phandle of the control module used by PHY driver to power on

   the PHY.



Recommended properies:

- syscon-phy-power : phandle/offset pair. Phandle to the system control

  module and the register offset to power on/off the PHY.



This is usually a subnode of ocp2scp to which it is connected.



usb2phy@4a0ad080 {

drivers/phy/phy-omap-usb2.c

+75 −17
Original line number Diff line number Diff line
@@ -29,6 +29,8 @@ 
#include <linux/delay.h>

#include <linux/phy/omap_control_phy.h>

#include <linux/phy/phy.h>

#include <linux/mfd/syscon.h>

#include <linux/regmap.h>

#include <linux/of_platform.h>



#define USB2PHY_DISCON_BYP_LATCH (1 << 31)
@@ -97,22 +99,38 @@ static int omap_usb_set_peripheral(struct usb_otg *otg, 
	return 0;

}



static int omap_usb_phy_power(struct omap_usb *phy, int on)

{

	u32 val;

	int ret;



	if (!phy->syscon_phy_power) {

		omap_control_phy_power(phy->control_dev, on);

		return 0;

	}



	if (on)

		val = phy->power_on;

	else

		val = phy->power_off;



	ret = regmap_update_bits(phy->syscon_phy_power, phy->power_reg,

				 phy->mask, val);

	return ret;

}



static int omap_usb_power_off(struct phy *x)

{

	struct omap_usb *phy = phy_get_drvdata(x);



	omap_control_phy_power(phy->control_dev, 0);



	return 0;

	return omap_usb_phy_power(phy, false);

}



static int omap_usb_power_on(struct phy *x)

{

	struct omap_usb *phy = phy_get_drvdata(x);



	omap_control_phy_power(phy->control_dev, 1);



	return 0;

	return omap_usb_phy_power(phy, true);

}



static int omap_usb_init(struct phy *x)
@@ -147,21 +165,38 @@ static const struct phy_ops ops = { 
static const struct usb_phy_data omap_usb2_data = {

	.label = "omap_usb2",

	.flags = OMAP_USB2_HAS_START_SRP | OMAP_USB2_HAS_SET_VBUS,

	.mask = OMAP_DEV_PHY_PD,

	.power_off = OMAP_DEV_PHY_PD,

};



static const struct usb_phy_data omap5_usb2_data = {

	.label = "omap5_usb2",

	.flags = 0,

	.mask = OMAP_DEV_PHY_PD,

	.power_off = OMAP_DEV_PHY_PD,

};



static const struct usb_phy_data dra7x_usb2_data = {

	.label = "dra7x_usb2",

	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,

	.mask = OMAP_DEV_PHY_PD,

	.power_off = OMAP_DEV_PHY_PD,

};



static const struct usb_phy_data dra7x_usb2_phy2_data = {

	.label = "dra7x_usb2_phy2",

	.flags = OMAP_USB2_CALIBRATE_FALSE_DISCONNECT,

	.mask = OMAP_USB2_PHY_PD,

	.power_off = OMAP_USB2_PHY_PD,

};



static const struct usb_phy_data am437x_usb2_data = {

	.label = "am437x_usb2",

	.flags =  0,

	.mask = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD |

		AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,

	.power_on = AM437X_USB2_OTGVDET_EN | AM437X_USB2_OTGSESSEND_EN,

	.power_off = AM437X_USB2_PHY_PD | AM437X_USB2_OTG_PD,

};



static const struct of_device_id omap_usb2_id_table[] = {
@@ -177,6 +212,10 @@ static const struct of_device_id omap_usb2_id_table[] = { 
		.compatible = "ti,dra7x-usb2",

		.data = &dra7x_usb2_data,

	},

	{

		.compatible = "ti,dra7x-usb2-phy2",

		.data = &dra7x_usb2_phy2_data,

	},

	{

		.compatible = "ti,am437x-usb2",

		.data = &am437x_usb2_data,
@@ -219,6 +258,9 @@ static int omap_usb2_probe(struct platform_device *pdev) 
	phy->phy.label		= phy_data->label;

	phy->phy.otg		= otg;

	phy->phy.type		= USB_PHY_TYPE_USB2;

	phy->mask		= phy_data->mask;

	phy->power_on		= phy_data->power_on;

	phy->power_off		= phy_data->power_off;



	if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -228,9 +270,17 @@ static int omap_usb2_probe(struct platform_device *pdev) 
		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;

	}



	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,

							"syscon-phy-power");

	if (IS_ERR(phy->syscon_phy_power)) {

		dev_dbg(&pdev->dev,

			"can't get syscon-phy-power, using control device\n");

		phy->syscon_phy_power = NULL;



		control_node = of_parse_phandle(node, "ctrl-module", 0);

		if (!control_node) {

		dev_err(&pdev->dev, "Failed to get control device phandle\n");

			dev_err(&pdev->dev,

				"Failed to get control device phandle\n");

			return -EINVAL;

		}
@@ -239,8 +289,16 @@ static int omap_usb2_probe(struct platform_device *pdev) 
			dev_err(&pdev->dev, "Failed to get control device\n");

			return -EINVAL;

		}



		phy->control_dev = &control_pdev->dev;

	} else {

		if (of_property_read_u32_index(node,

					       "syscon-phy-power", 1,

					       &phy->power_reg)) {

			dev_err(&pdev->dev,

				"couldn't get power reg. offset\n");

			return -EINVAL;

		}

	}



	otg->set_host		= omap_usb_set_host;

	otg->set_peripheral	= omap_usb_set_peripheral;

include/linux/phy/omap_usb.h

+23 −0
Original line number Diff line number Diff line
@@ -30,6 +30,12 @@ struct usb_dpll_params { 
	u32	mf;

};



enum omap_usb_phy_type {

	TYPE_USB2,    /* USB2_PHY, power down in CONTROL_DEV_CONF */

	TYPE_DRA7USB2, /* USB2 PHY, power and power_aux e.g. DRA7 */

	TYPE_AM437USB2, /* USB2 PHY, power e.g. AM437x */

};



struct omap_usb {

	struct usb_phy		phy;

	struct phy_companion	*comparator;
@@ -40,11 +46,20 @@ struct omap_usb { 
	struct clk		*wkupclk;

	struct clk		*optclk;

	u8			flags;

	enum omap_usb_phy_type	type;

	struct regmap		*syscon_phy_power; /* ctrl. reg. acces */

	unsigned int		power_reg; /* power reg. index within syscon */

	u32			mask;

	u32			power_on;

	u32			power_off;

};



struct usb_phy_data {

	const char *label;

	u8 flags;

	u32 mask;

	u32 power_on;

	u32 power_off;

};



/* Driver Flags */
@@ -52,6 +67,14 @@ struct usb_phy_data { 
#define OMAP_USB2_HAS_SET_VBUS (1 << 1)

#define OMAP_USB2_CALIBRATE_FALSE_DISCONNECT (1 << 2)



#define OMAP_DEV_PHY_PD		BIT(0)

#define OMAP_USB2_PHY_PD	BIT(28)



#define AM437X_USB2_PHY_PD		BIT(0)

#define AM437X_USB2_OTG_PD		BIT(1)

#define AM437X_USB2_OTGVDET_EN		BIT(19)

#define AM437X_USB2_OTGSESSEND_EN	BIT(20)



#define	phy_to_omapusb(x)	container_of((x), struct omap_usb, phy)



#if defined(CONFIG_OMAP_USB2) || defined(CONFIG_OMAP_USB2_MODULE)

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