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[PATCH 0/7] phy: use syscon framework APIs to set ctrl mod reg

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  [PATCH 0/7] phy: use syscon framework APIs to set ctrl mod reg Kishon Vijay Abraham I <kishon@ti.com> - 2015-08-04 17:30 +0200
    [PATCH 7/7] phy: omap-usb2: use *syscon* framework API to power on/off the PHY Kishon Vijay Abraham I <kishon@ti.com> - 2015-08-04 17:30 +0200
      Re: [PATCH 7/7] phy: omap-usb2: use *syscon* framework API to power  on/off the PHY Roger Quadros <rogerq@ti.com> - 2015-08-05 10:40 +0200
        Re: [PATCH 7/7] phy: omap-usb2: use *syscon* framework API to power  on/off the PHY Kishon Vijay Abraham I <kishon@ti.com> - 2015-08-05 16:30 +0200
    [PATCH 3/7] phy: ti-pipe3: use *syscon* framework API to power on/off the PHY Kishon Vijay Abraham I <kishon@ti.com> - 2015-08-04 17:30 +0200

#1200079 — [PATCH 0/7] phy: use syscon framework APIs to set ctrl mod reg

This series is split from [1] to include only the PHY patches.

This series is basically to deprecate using phy-omap-control and use
syscon APIs to program the control module registers.

Changes from [1] in PHY patches include
*) cleanup ti_pipe3_probe
*) have mask, power_on and power_off values in usb_phy_data for
   omap-usb2 phy

Did basic enumeration testing in the below platforms.
*) Tested PCIe, SATA and USB in dra7
*) Tested SATA and USB in omap5
*) Tested USB(dwc3) in am43xx_evm
*) Tested USB(musb) in omap4 panda after including [2]

All the testing was done both before applying the dt patches and after
applying the dt patches (dt patches will be posted shortly).

[1] -> https://lkml.org/lkml/2015/6/23/189
[2] -> http://permalink.gmane.org/gmane.linux.kernel/2012427

Kishon Vijay Abraham I (7):
  phy: ti-pipe3: cleanup ti_pipe3_probe()
  phy: ti-pipe3: use ti_pipe3_power_off to power off the PHY during
    probe
  phy: ti-pipe3: use *syscon* framework API to power on/off the PHY
  phy: ti-pipe3: use *syscon* framework API to set PCS value of the PHY
  phy: omap-usb2: use omap_usb_power_off to power off the PHY during
    probe
  phy: omap-usb2: Add a new compatible string for USB2 PHY2
  phy: omap-usb2: use *syscon* framework API to power on/off the PHY

 Documentation/devicetree/bindings/phy/ti-phy.txt |   20 +-
 drivers/phy/phy-omap-usb2.c                      |   96 ++++++--
 drivers/phy/phy-ti-pipe3.c                       |  283 ++++++++++++++++------
 include/linux/phy/omap_usb.h                     |   23 ++
 4 files changed, 329 insertions(+), 93 deletions(-)

-- 
1.7.9.5

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#1200082 — [PATCH 7/7] 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: Kishon Vijay Abraham I <kishon@ti.com>
---
 Documentation/devicetree/bindings/phy/ti-phy.txt |    6 +-
 drivers/phy/phy-omap-usb2.c                      |   85 +++++++++++++++++-----
 include/linux/phy/omap_usb.h                     |   23 ++++++
 3 files changed, 96 insertions(+), 18 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
index a061077..a3b3945 100644
--- a/Documentation/devicetree/bindings/phy/ti-phy.txt
+++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
@@ -42,10 +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 {
diff --git a/drivers/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c
index 2f7220f..531fe04 100644
--- a/drivers/phy/phy-omap-usb2.c
+++ b/drivers/phy/phy-omap-usb2.c
@@ -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 +99,40 @@ static int omap_usb_set_peripheral(struct usb_otg *otg,
 	return 0;
 }
 
-static int omap_usb_power_off(struct phy *x)
+static int omap_usb_phy_power(struct omap_usb *phy, int on)
 {
-	struct omap_usb *phy = phy_get_drvdata(x);
+	u32 val = 0;
+	int ret;
 
-	omap_control_phy_power(phy->control_dev, 0);
+	if (phy->syscon_phy_power) {
+		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);
+		if (ret < 0)
+			return ret;
+	} else {
+		omap_control_phy_power(phy->control_dev, on);
+	}
 
 	return 0;
 }
 
-static int omap_usb_power_on(struct phy *x)
+static int omap_usb_power_off(struct phy *x)
 {
 	struct omap_usb *phy = phy_get_drvdata(x);
 
-	omap_control_phy_power(phy->control_dev, 1);
+	return omap_usb_phy_power(phy, false);
+}
 
-	return 0;
+static int omap_usb_power_on(struct phy *x)
+{
+	struct omap_usb *phy = phy_get_drvdata(x);
+
+	return omap_usb_phy_power(phy, true);
 }
 
 static int omap_usb_init(struct phy *x)
@@ -147,26 +167,38 @@ static 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[] = {
@@ -228,6 +260,9 @@ 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);
@@ -237,20 +272,36 @@ static int omap_usb2_probe(struct platform_device *pdev)
 		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
 	}
 
-	control_node = of_parse_phandle(node, "ctrl-module", 0);
-	if (!control_node) {
-		dev_err(&pdev->dev, "Failed to get control device phandle\n");
-		return -EINVAL;
-	}
+	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
+							"syscon-phy-power");
+	if (IS_ERR(phy->syscon_phy_power)) {
+		dev_info(&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");
+			return -EINVAL;
+		}
 
-	control_pdev = of_find_device_by_node(control_node);
-	if (!control_pdev) {
-		dev_err(&pdev->dev, "Failed to get control device\n");
-		return -EINVAL;
+		control_pdev = of_find_device_by_node(control_node);
+		if (!control_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;
+		}
 	}
 
-	phy->control_dev = &control_pdev->dev;
-
 	otg->set_host		= omap_usb_set_host;
 	otg->set_peripheral	= omap_usb_set_peripheral;
 	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
diff --git a/include/linux/phy/omap_usb.h b/include/linux/phy/omap_usb.h
index dc2c541..2e5fb87 100644
--- a/include/linux/phy/omap_usb.h
+++ b/include/linux/phy/omap_usb.h
@@ -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)
-- 
1.7.9.5

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#1200532 — Re: [PATCH 7/7] phy: omap-usb2: use *syscon* framework API to power on/off the PHY

On 04/08/15 18:20, Kishon Vijay Abraham I wrote:
> 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: Kishon Vijay Abraham I <kishon@ti.com>
> ---
>  Documentation/devicetree/bindings/phy/ti-phy.txt |    6 +-
>  drivers/phy/phy-omap-usb2.c                      |   85 +++++++++++++++++-----
>  include/linux/phy/omap_usb.h                     |   23 ++++++
>  3 files changed, 96 insertions(+), 18 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
> index a061077..a3b3945 100644
> --- a/Documentation/devicetree/bindings/phy/ti-phy.txt
> +++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
> @@ -42,10 +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 {
> diff --git a/drivers/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c
> index 2f7220f..531fe04 100644
> --- a/drivers/phy/phy-omap-usb2.c
> +++ b/drivers/phy/phy-omap-usb2.c
> @@ -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 +99,40 @@ static int omap_usb_set_peripheral(struct usb_otg *otg,
>  	return 0;
>  }
>  
> -static int omap_usb_power_off(struct phy *x)
> +static int omap_usb_phy_power(struct omap_usb *phy, int on)
>  {
> -	struct omap_usb *phy = phy_get_drvdata(x);
> +	u32 val = 0;

No need to initialize val.

> +	int ret;
>  
> -	omap_control_phy_power(phy->control_dev, 0);
> +	if (phy->syscon_phy_power) {
> +		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);
> +		if (ret < 0)
> +			return ret;
> +	} else {
> +		omap_control_phy_power(phy->control_dev, on);
> +	}
>  
>  	return 0;
>  }
>  
> -static int omap_usb_power_on(struct phy *x)
> +static int omap_usb_power_off(struct phy *x)
>  {
>  	struct omap_usb *phy = phy_get_drvdata(x);
>  
> -	omap_control_phy_power(phy->control_dev, 1);
> +	return omap_usb_phy_power(phy, false);
> +}
>  
> -	return 0;
> +static int omap_usb_power_on(struct phy *x)
> +{
> +	struct omap_usb *phy = phy_get_drvdata(x);
> +
> +	return omap_usb_phy_power(phy, true);
>  }
>  
>  static int omap_usb_init(struct phy *x)
> @@ -147,26 +167,38 @@ static 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,

We're combining some OTG operations with PHY on/off. This is probably OK
for now but looks like we need a OTG phy driver for this?

>  };
>  
>  static const struct of_device_id omap_usb2_id_table[] = {
> @@ -228,6 +260,9 @@ 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);
> @@ -237,20 +272,36 @@ static int omap_usb2_probe(struct platform_device *pdev)
>  		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
>  	}
>  
> -	control_node = of_parse_phandle(node, "ctrl-module", 0);
> -	if (!control_node) {
> -		dev_err(&pdev->dev, "Failed to get control device phandle\n");
> -		return -EINVAL;
> -	}
> +	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
> +							"syscon-phy-power");
> +	if (IS_ERR(phy->syscon_phy_power)) {
> +		dev_info(&pdev->dev,
> +			 "can't get syscon-phy-power, using control device\n");

dev_dbg()?

> +		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");
> +			return -EINVAL;
> +		}
>  
> -	control_pdev = of_find_device_by_node(control_node);
> -	if (!control_pdev) {
> -		dev_err(&pdev->dev, "Failed to get control device\n");
> -		return -EINVAL;
> +		control_pdev = of_find_device_by_node(control_node);
> +		if (!control_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;
> +		}
>  	}
>  
> -	phy->control_dev = &control_pdev->dev;
> -
>  	otg->set_host		= omap_usb_set_host;
>  	otg->set_peripheral	= omap_usb_set_peripheral;
>  	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
> diff --git a/include/linux/phy/omap_usb.h b/include/linux/phy/omap_usb.h
> index dc2c541..2e5fb87 100644
> --- a/include/linux/phy/omap_usb.h
> +++ b/include/linux/phy/omap_usb.h
> @@ -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)
> +

Is all this used by anyone other than the phy driver?
If not we should move whatever possible into the .c file.

Could be a separate patch of course.


>  #define	phy_to_omapusb(x)	container_of((x), struct omap_usb, phy)
>  
>  #if defined(CONFIG_OMAP_USB2) || defined(CONFIG_OMAP_USB2_MODULE)
> 

cheers,
-roger
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#1200821 — Re: [PATCH 7/7] phy: omap-usb2: use *syscon* framework API to power on/off the PHY

Hi,

On Wednesday 05 August 2015 02:05 PM, Roger Quadros wrote:
> On 04/08/15 18:20, Kishon Vijay Abraham I wrote:
>> 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: Kishon Vijay Abraham I <kishon@ti.com>
>> ---
>>  Documentation/devicetree/bindings/phy/ti-phy.txt |    6 +-
>>  drivers/phy/phy-omap-usb2.c                      |   85 +++++++++++++++++-----
>>  include/linux/phy/omap_usb.h                     |   23 ++++++
>>  3 files changed, 96 insertions(+), 18 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
>> index a061077..a3b3945 100644
>> --- a/Documentation/devicetree/bindings/phy/ti-phy.txt
>> +++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
>> @@ -42,10 +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 {
>> diff --git a/drivers/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c
>> index 2f7220f..531fe04 100644
>> --- a/drivers/phy/phy-omap-usb2.c
>> +++ b/drivers/phy/phy-omap-usb2.c
>> @@ -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 +99,40 @@ static int omap_usb_set_peripheral(struct usb_otg *otg,
>>  	return 0;
>>  }
>>  
>> -static int omap_usb_power_off(struct phy *x)
>> +static int omap_usb_phy_power(struct omap_usb *phy, int on)
>>  {
>> -	struct omap_usb *phy = phy_get_drvdata(x);
>> +	u32 val = 0;
> 
> No need to initialize val.

indeed.
> 
>> +	int ret;
>>  
>> -	omap_control_phy_power(phy->control_dev, 0);
>> +	if (phy->syscon_phy_power) {
>> +		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);
>> +		if (ret < 0)
>> +			return ret;
>> +	} else {
>> +		omap_control_phy_power(phy->control_dev, on);
>> +	}
>>  
>>  	return 0;
>>  }
>>  
>> -static int omap_usb_power_on(struct phy *x)
>> +static int omap_usb_power_off(struct phy *x)
>>  {
>>  	struct omap_usb *phy = phy_get_drvdata(x);
>>  
>> -	omap_control_phy_power(phy->control_dev, 1);
>> +	return omap_usb_phy_power(phy, false);
>> +}
>>  
>> -	return 0;
>> +static int omap_usb_power_on(struct phy *x)
>> +{
>> +	struct omap_usb *phy = phy_get_drvdata(x);
>> +
>> +	return omap_usb_phy_power(phy, true);
>>  }
>>  
>>  static int omap_usb_init(struct phy *x)
>> @@ -147,26 +167,38 @@ static 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,
> 
> We're combining some OTG operations with PHY on/off. This is probably OK
> for now but looks like we need a OTG phy driver for this?

Yes. Once we have that we can stop using the USB PHY library from this driver.
> 
>>  };
>>  
>>  static const struct of_device_id omap_usb2_id_table[] = {
>> @@ -228,6 +260,9 @@ 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);
>> @@ -237,20 +272,36 @@ static int omap_usb2_probe(struct platform_device *pdev)
>>  		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
>>  	}
>>  
>> -	control_node = of_parse_phandle(node, "ctrl-module", 0);
>> -	if (!control_node) {
>> -		dev_err(&pdev->dev, "Failed to get control device phandle\n");
>> -		return -EINVAL;
>> -	}
>> +	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
>> +							"syscon-phy-power");
>> +	if (IS_ERR(phy->syscon_phy_power)) {
>> +		dev_info(&pdev->dev,
>> +			 "can't get syscon-phy-power, using control device\n");
> 
> dev_dbg()?

okay.
> 
>> +		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");
>> +			return -EINVAL;
>> +		}
>>  
>> -	control_pdev = of_find_device_by_node(control_node);
>> -	if (!control_pdev) {
>> -		dev_err(&pdev->dev, "Failed to get control device\n");
>> -		return -EINVAL;
>> +		control_pdev = of_find_device_by_node(control_node);
>> +		if (!control_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;
>> +		}
>>  	}
>>  
>> -	phy->control_dev = &control_pdev->dev;
>> -
>>  	otg->set_host		= omap_usb_set_host;
>>  	otg->set_peripheral	= omap_usb_set_peripheral;
>>  	if (phy_data->flags & OMAP_USB2_HAS_SET_VBUS)
>> diff --git a/include/linux/phy/omap_usb.h b/include/linux/phy/omap_usb.h
>> index dc2c541..2e5fb87 100644
>> --- a/include/linux/phy/omap_usb.h
>> +++ b/include/linux/phy/omap_usb.h
>> @@ -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)
>> +
> 
> Is all this used by anyone other than the phy driver?
> If not we should move whatever possible into the .c file.
> 
> Could be a separate patch of course.

sure.

Thanks
Kishon
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#1200083 — [PATCH 3/7] phy: ti-pipe3: 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.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
---
 Documentation/devicetree/bindings/phy/ti-phy.txt |   10 ++-
 drivers/phy/phy-ti-pipe3.c                       |   90 ++++++++++++++++++----
 2 files changed, 85 insertions(+), 15 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/ti-phy.txt b/Documentation/devicetree/bindings/phy/ti-phy.txt
index 9cf9446..e06f980 100644
--- a/Documentation/devicetree/bindings/phy/ti-phy.txt
+++ b/Documentation/devicetree/bindings/phy/ti-phy.txt
@@ -77,8 +77,6 @@ Required properties:
    * "div-clk" - apll clock
 
 Optional properties:
- - ctrl-module : phandle of the control module used by PHY driver to power on
-   the PHY.
  - id: If there are multiple instance of the same type, in order to
    differentiate between each instance "id" can be used (e.g., multi-lane PCIe
    PHY). If "id" is not provided, it is set to default value of '1'.
@@ -86,6 +84,14 @@ Optional properties:
    CTRL_CORE_SMA_SW_0 register and register offset to the CTRL_CORE_SMA_SW_0
    register that contains the SATA_PLL_SOFT_RESET bit. Only valid for sata_phy.
 
+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.
 
 usb3phy@4a084400 {
diff --git a/drivers/phy/phy-ti-pipe3.c b/drivers/phy/phy-ti-pipe3.c
index 9782c16..a7c20e8 100644
--- a/drivers/phy/phy-ti-pipe3.c
+++ b/drivers/phy/phy-ti-pipe3.c
@@ -56,6 +56,15 @@
 
 #define SATA_PLL_SOFT_RESET	BIT(18)
 
+#define PIPE3_PHY_PWRCTL_CLK_CMD_MASK	0x003FC000
+#define PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT	14
+
+#define PIPE3_PHY_PWRCTL_CLK_FREQ_MASK	0xFFC00000
+#define PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT	22
+
+#define PIPE3_PHY_TX_RX_POWERON		0x3
+#define PIPE3_PHY_TX_RX_POWEROFF	0x0
+
 /*
  * This is an Empirical value that works, need to confirm the actual
  * value required for the PIPE3PHY_PLL_CONFIGURATION2.PLL_IDLE status
@@ -86,8 +95,10 @@ struct ti_pipe3 {
 	struct clk		*refclk;
 	struct clk		*div_clk;
 	struct pipe3_dpll_map	*dpll_map;
+	struct regmap		*phy_power_syscon; /* ctrl. reg. acces */
 	struct regmap		*dpll_reset_syscon; /* ctrl. reg. acces */
 	unsigned int		dpll_reset_reg; /* reg. index within syscon */
+	unsigned int		power_reg; /* power reg. index within syscon */
 	bool			sata_refclk_enabled;
 };
 
@@ -144,18 +155,53 @@ static void ti_pipe3_disable_clocks(struct ti_pipe3 *phy);
 
 static int ti_pipe3_power_off(struct phy *x)
 {
+	u32 val;
+	int ret;
 	struct ti_pipe3 *phy = phy_get_drvdata(x);
 
-	omap_control_phy_power(phy->control_dev, 0);
+	if (phy->phy_power_syscon) {
+		val = PIPE3_PHY_TX_RX_POWEROFF <<
+			PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+
+		ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
+					 PIPE3_PHY_PWRCTL_CLK_CMD_MASK, val);
+		if (ret < 0)
+			return ret;
+	} else {
+		omap_control_phy_power(phy->control_dev, 0);
+	}
 
 	return 0;
 }
 
 static int ti_pipe3_power_on(struct phy *x)
 {
+	u32 val;
+	u32 mask;
+	int ret;
+	unsigned long rate;
 	struct ti_pipe3 *phy = phy_get_drvdata(x);
 
-	omap_control_phy_power(phy->control_dev, 1);
+	if (phy->phy_power_syscon) {
+		rate = clk_get_rate(phy->sys_clk);
+		if (!rate) {
+			dev_err(phy->dev, "Invalid clock rate\n");
+			return -EINVAL;
+		}
+		rate = rate / 1000000;
+		mask = OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_CMD_MASK |
+			  OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_MASK;
+		val = PIPE3_PHY_TX_RX_POWERON <<
+			PIPE3_PHY_PWRCTL_CLK_CMD_SHIFT;
+		val |= rate << OMAP_CTRL_PIPE3_PHY_PWRCTL_CLK_FREQ_SHIFT;
+
+		ret = regmap_update_bits(phy->phy_power_syscon, phy->power_reg,
+					 mask, val);
+		if (ret < 0)
+			return ret;
+	} else {
+		omap_control_phy_power(phy->control_dev, 1);
+	}
 
 	return 0;
 }
@@ -364,7 +410,8 @@ static int ti_pipe3_get_clk(struct ti_pipe3 *phy)
 		phy->wkupclk = ERR_PTR(-ENODEV);
 	}
 
-	if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie")) {
+	if (!of_device_is_compatible(node, "ti,phy-pipe3-pcie") ||
+	    phy->phy_power_syscon) {
 		phy->sys_clk = devm_clk_get(dev, "sysclk");
 		if (IS_ERR(phy->sys_clk)) {
 			dev_err(dev, "unable to get sysclk\n");
@@ -413,19 +460,36 @@ static int ti_pipe3_get_sysctrl(struct ti_pipe3 *phy)
 	struct device_node *control_node;
 	struct platform_device *control_pdev;
 
-	control_node = of_parse_phandle(node, "ctrl-module", 0);
-	if (!control_node) {
-		dev_err(dev, "Failed to get control device phandle\n");
-		return -EINVAL;
+	phy->phy_power_syscon = syscon_regmap_lookup_by_phandle(node,
+							"syscon-phy-power");
+	if (IS_ERR(phy->phy_power_syscon)) {
+		dev_dbg(dev,
+			"can't get syscon-phy-power, using control device\n");
+		phy->phy_power_syscon = NULL;
+	} else {
+		if (of_property_read_u32_index(node,
+					       "syscon-phy-power", 1,
+					       &phy->power_reg)) {
+			dev_err(dev, "couldn't get power reg. offset\n");
+			return -EINVAL;
+		}
 	}
 
-	control_pdev = of_find_device_by_node(control_node);
-	if (!control_pdev) {
-		dev_err(dev, "Failed to get control device\n");
-		return -EINVAL;
-	}
+	if (!phy->phy_power_syscon) {
+		control_node = of_parse_phandle(node, "ctrl-module", 0);
+		if (!control_node) {
+			dev_err(dev, "Failed to get control device phandle\n");
+			return -EINVAL;
+		}
 
-	phy->control_dev = &control_pdev->dev;
+		control_pdev = of_find_device_by_node(control_node);
+		if (!control_pdev) {
+			dev_err(dev, "Failed to get control device\n");
+			return -EINVAL;
+		}
+
+		phy->control_dev = &control_pdev->dev;
+	}
 
 	if (of_device_is_compatible(node, "ti,phy-pipe3-sata")) {
 		phy->dpll_reset_syscon = syscon_regmap_lookup_by_phandle(node,
-- 
1.7.9.5

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