[PATCH v2 0/7] ARM: qcom: msm8974-hammerhead: add USB OTG support

[PATCH v2 0/7] ARM: qcom: msm8974-hammerhead: add USB OTG support

[Brian Masney]

This patch set adds USB OTG support for the LG Nexus 5 (hammerhead)
phone.

Changes in v2:
- Reworked patches to use gpio hogging as suggested in the bq24190
  device tree documentation.
- bq24190_charger: changed to use a switch instead of an if as requested
  by Sebastian Reichel.
- bq24190_charger dt-bindings: added usb-otg-vbus to example.


Brian Masney (5):
  dt-bindings: power: supply: bq24190_charger: add bq24192 and
    usb-otg-vbus
  power: supply: bq24190_charger: add extcon support for USB OTG
  pinctrl: qcom: spmi-gpio: fix gpio-hog related boot issues
  ARM: dts: qcom: msm8974: add gpio-ranges
  ARM: dts: qcom: msm8974-hammerhead: add USB OTG support

Jonathan Marek (2):
  power: supply: bq24190_charger: add support for bq24192 variant
  power: supply: bq24190_charger: add of_match for usb-otg-vbus
    regulator

 .../bindings/power/supply/bq24190.txt         |  9 +++
 .../qcom-msm8974-lge-nexus5-hammerhead.dts    | 60 +++++++++++++++++++
 arch/arm/boot/dts/qcom-msm8974.dtsi           | 11 ++++
 arch/arm/boot/dts/qcom-pm8941.dtsi            |  1 +
 drivers/pinctrl/qcom/pinctrl-spmi-gpio.c      | 21 +++++--
 drivers/power/supply/bq24190_charger.c        | 48 ++++++++++++++-
 6 files changed, 143 insertions(+), 7 deletions(-)

-- 
2.17.2

[PATCH v2 1/7] dt-bindings: power: supply: bq24190_charger: add bq24192 and usb-otg-vbus

[Brian Masney]

Add support for the ti,bq24192 variant and a child node for the
usb-otg-vbus regulator.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 .../devicetree/bindings/power/supply/bq24190.txt         | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/supply/bq24190.txt b/Documentation/devicetree/bindings/power/supply/bq24190.txt
index 9e517d307070..c8ac028bd3c7 100644
--- a/Documentation/devicetree/bindings/power/supply/bq24190.txt
+++ b/Documentation/devicetree/bindings/power/supply/bq24190.txt
@@ -3,6 +3,7 @@ TI BQ24190 Li-Ion Battery Charger
 Required properties:
 - compatible: contains one of the following:
     * "ti,bq24190"
+    * "ti,bq24192"
     * "ti,bq24192i"
 - reg: integer, I2C address of the charger.
 - interrupts[-extended]: configuration for charger INT pin.
@@ -19,6 +20,12 @@ Optional properties:
 - ti,system-minimum-microvolt: when power is connected and the battery is below
   minimum system voltage, the system will be regulated above this setting.
 
+child nodes:
+- usb-otg-vbus:
+  Usage: optional
+  Description: Regulator that is used to control the VBUS voltage direction for
+               either USB host mode or for charging on the OTG port.
+
 Notes:
 - Some circuit boards wire the chip's "OTG" pin high (enabling 500mA default
   charge current on USB SDP ports, among other features). To simulate this on
@@ -39,6 +46,8 @@ Example:
 		interrupts-extended = <&gpiochip 10 IRQ_TYPE_EDGE_FALLING>;
 		monitored-battery = <&bat>;
 		ti,system-minimum-microvolt = <3200000>;
+
+		usb_otg_vbus: usb-otg-vbus { };
 	};
 
 	&twl_gpio {
-- 
2.17.2

Re: [PATCH v2 1/7] dt-bindings: power: supply: bq24190_charger: add bq24192 and usb-otg-vbus

[Rob Herring]

On Wed, 31 Oct 2018 20:11:43 -0400, Brian Masney wrote:
> Add support for the ti,bq24192 variant and a child node for the
> usb-otg-vbus regulator.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---
>  .../devicetree/bindings/power/supply/bq24190.txt         | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 

Reviewed-by: Rob Herring <robh@kernel.org>

Re: [PATCH v2 1/7] dt-bindings: power: supply: bq24190_charger: add bq24192 and usb-otg-vbus

[Sebastian Reichel]

[-- Attachment #1: Type: text/plain, Size: 1883 bytes --]

Hi,

On Wed, Oct 31, 2018 at 08:11:43PM -0400, Brian Masney wrote:
> Add support for the ti,bq24192 variant and a child node for the
> usb-otg-vbus regulator.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---

Thanks, queued.

-- Sebastian

>  .../devicetree/bindings/power/supply/bq24190.txt         | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/power/supply/bq24190.txt b/Documentation/devicetree/bindings/power/supply/bq24190.txt
> index 9e517d307070..c8ac028bd3c7 100644
> --- a/Documentation/devicetree/bindings/power/supply/bq24190.txt
> +++ b/Documentation/devicetree/bindings/power/supply/bq24190.txt
> @@ -3,6 +3,7 @@ TI BQ24190 Li-Ion Battery Charger
>  Required properties:
>  - compatible: contains one of the following:
>      * "ti,bq24190"
> +    * "ti,bq24192"
>      * "ti,bq24192i"
>  - reg: integer, I2C address of the charger.
>  - interrupts[-extended]: configuration for charger INT pin.
> @@ -19,6 +20,12 @@ Optional properties:
>  - ti,system-minimum-microvolt: when power is connected and the battery is below
>    minimum system voltage, the system will be regulated above this setting.
>  
> +child nodes:
> +- usb-otg-vbus:
> +  Usage: optional
> +  Description: Regulator that is used to control the VBUS voltage direction for
> +               either USB host mode or for charging on the OTG port.
> +
>  Notes:
>  - Some circuit boards wire the chip's "OTG" pin high (enabling 500mA default
>    charge current on USB SDP ports, among other features). To simulate this on
> @@ -39,6 +46,8 @@ Example:
>  		interrupts-extended = <&gpiochip 10 IRQ_TYPE_EDGE_FALLING>;
>  		monitored-battery = <&bat>;
>  		ti,system-minimum-microvolt = <3200000>;
> +
> +		usb_otg_vbus: usb-otg-vbus { };
>  	};
>  
>  	&twl_gpio {
> -- 
> 2.17.2
> 

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[PATCH v2 2/7] power: supply: bq24190_charger: add support for bq24192 variant

[Brian Masney]

From: Jonathan Marek <jonathan@marek.ca>

This patch adds support for the bq24192 variant to bq24190_charger.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
[masneyb@onstation.org: Changed if statement to a switch based on
feedback from Sebastian Reichel.]
Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/power/supply/bq24190_charger.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index b58df04d03b3..44d3aff32885 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -1637,8 +1637,12 @@ static int bq24190_hw_init(struct bq24190_dev_info *bdi)
 	if (ret < 0)
 		return ret;
 
-	if (v != BQ24190_REG_VPRS_PN_24190 &&
-	    v != BQ24190_REG_VPRS_PN_24192I) {
+	switch (v) {
+	case BQ24190_REG_VPRS_PN_24190:
+	case BQ24190_REG_VPRS_PN_24192:
+	case BQ24190_REG_VPRS_PN_24192I:
+		break;
+	default:
 		dev_err(bdi->dev, "Error unknown model: 0x%02x\n", v);
 		return -ENODEV;
 	}
@@ -1931,6 +1935,7 @@ static const struct dev_pm_ops bq24190_pm_ops = {
 
 static const struct i2c_device_id bq24190_i2c_ids[] = {
 	{ "bq24190" },
+	{ "bq24192" },
 	{ "bq24192i" },
 	{ },
 };
@@ -1939,6 +1944,7 @@ MODULE_DEVICE_TABLE(i2c, bq24190_i2c_ids);
 #ifdef CONFIG_OF
 static const struct of_device_id bq24190_of_match[] = {
 	{ .compatible = "ti,bq24190", },
+	{ .compatible = "ti,bq24192", },
 	{ .compatible = "ti,bq24192i", },
 	{ },
 };
-- 
2.17.2

Re: [PATCH v2 2/7] power: supply: bq24190_charger: add support for bq24192 variant

[Sebastian Reichel]

[-- Attachment #1: Type: text/plain, Size: 1779 bytes --]

Hi,

On Wed, Oct 31, 2018 at 08:11:44PM -0400, Brian Masney wrote:
> From: Jonathan Marek <jonathan@marek.ca>
> 
> This patch adds support for the bq24192 variant to bq24190_charger.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> [masneyb@onstation.org: Changed if statement to a switch based on
> feedback from Sebastian Reichel.]
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---

Thanks, queued.

-- Sebastian

>  drivers/power/supply/bq24190_charger.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> index b58df04d03b3..44d3aff32885 100644
> --- a/drivers/power/supply/bq24190_charger.c
> +++ b/drivers/power/supply/bq24190_charger.c
> @@ -1637,8 +1637,12 @@ static int bq24190_hw_init(struct bq24190_dev_info *bdi)
>  	if (ret < 0)
>  		return ret;
>  
> -	if (v != BQ24190_REG_VPRS_PN_24190 &&
> -	    v != BQ24190_REG_VPRS_PN_24192I) {
> +	switch (v) {
> +	case BQ24190_REG_VPRS_PN_24190:
> +	case BQ24190_REG_VPRS_PN_24192:
> +	case BQ24190_REG_VPRS_PN_24192I:
> +		break;
> +	default:
>  		dev_err(bdi->dev, "Error unknown model: 0x%02x\n", v);
>  		return -ENODEV;
>  	}
> @@ -1931,6 +1935,7 @@ static const struct dev_pm_ops bq24190_pm_ops = {
>  
>  static const struct i2c_device_id bq24190_i2c_ids[] = {
>  	{ "bq24190" },
> +	{ "bq24192" },
>  	{ "bq24192i" },
>  	{ },
>  };
> @@ -1939,6 +1944,7 @@ MODULE_DEVICE_TABLE(i2c, bq24190_i2c_ids);
>  #ifdef CONFIG_OF
>  static const struct of_device_id bq24190_of_match[] = {
>  	{ .compatible = "ti,bq24190", },
> +	{ .compatible = "ti,bq24192", },
>  	{ .compatible = "ti,bq24192i", },
>  	{ },
>  };
> -- 
> 2.17.2
> 

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[PATCH v2 3/7] power: supply: bq24190_charger: add of_match for usb-otg-vbus regulator

[Brian Masney]

From: Jonathan Marek <jonathan@marek.ca>

This patch adds an of_match for the usb-otg-vbus regulator to
bq24190_charger.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/power/supply/bq24190_charger.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index 44d3aff32885..9e7f3e33458a 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -577,6 +577,7 @@ static const struct regulator_ops bq24190_vbus_ops = {
 
 static const struct regulator_desc bq24190_vbus_desc = {
 	.name = "usb_otg_vbus",
+	.of_match = "usb-otg-vbus",
 	.type = REGULATOR_VOLTAGE,
 	.owner = THIS_MODULE,
 	.ops = &bq24190_vbus_ops,
-- 
2.17.2

Re: [PATCH v2 3/7] power: supply: bq24190_charger: add of_match for usb-otg-vbus regulator

[Sebastian Reichel]

[-- Attachment #1: Type: text/plain, Size: 999 bytes --]

Hi,

On Wed, Oct 31, 2018 at 08:11:45PM -0400, Brian Masney wrote:
> From: Jonathan Marek <jonathan@marek.ca>
> 
> This patch adds an of_match for the usb-otg-vbus regulator to
> bq24190_charger.
> 
> Signed-off-by: Jonathan Marek <jonathan@marek.ca>
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---

Thanks, queued.

-- Sebastian

>  drivers/power/supply/bq24190_charger.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> index 44d3aff32885..9e7f3e33458a 100644
> --- a/drivers/power/supply/bq24190_charger.c
> +++ b/drivers/power/supply/bq24190_charger.c
> @@ -577,6 +577,7 @@ static const struct regulator_ops bq24190_vbus_ops = {
>  
>  static const struct regulator_desc bq24190_vbus_desc = {
>  	.name = "usb_otg_vbus",
> +	.of_match = "usb-otg-vbus",
>  	.type = REGULATOR_VOLTAGE,
>  	.owner = THIS_MODULE,
>  	.ops = &bq24190_vbus_ops,
> -- 
> 2.17.2
> 

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[PATCH v2 4/7] power: supply: bq24190_charger: add extcon support for USB OTG

[Brian Masney]

Add extcon support so that we can notify USB drivers of cable state
changes. Based on work from Jonathan Marek. USB OTG was tested on a LG
Nexus 5 (hammerhead) phone.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/power/supply/bq24190_charger.c | 37 +++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
index 9e7f3e33458a..4e64e6ac95c5 100644
--- a/drivers/power/supply/bq24190_charger.c
+++ b/drivers/power/supply/bq24190_charger.c
@@ -21,6 +21,7 @@
 #include <linux/workqueue.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
+#include <linux/extcon-provider.h>
 
 #define	BQ24190_MANUFACTURER	"Texas Instruments"
 
@@ -159,6 +160,7 @@
 struct bq24190_dev_info {
 	struct i2c_client		*client;
 	struct device			*dev;
+	struct extcon_dev		*edev;
 	struct power_supply		*charger;
 	struct power_supply		*battery;
 	struct delayed_work		input_current_limit_work;
@@ -174,6 +176,11 @@ struct bq24190_dev_info {
 	u8				watchdog;
 };
 
+static const unsigned int bq24190_usb_extcon_cable[] = {
+	EXTCON_USB,
+	EXTCON_NONE,
+};
+
 /*
  * The tables below provide a 2-way mapping for the value that goes in
  * the register field and the real-world value that it represents.
@@ -1528,6 +1535,20 @@ static const struct power_supply_desc bq24190_battery_desc = {
 	.property_is_writeable	= bq24190_battery_property_is_writeable,
 };
 
+static int bq24190_configure_usb_otg(struct bq24190_dev_info *bdi, u8 ss_reg)
+{
+	bool otg_enabled;
+	int ret;
+
+	otg_enabled = !!(ss_reg & BQ24190_REG_SS_VBUS_STAT_MASK);
+	ret = extcon_set_state_sync(bdi->edev, EXTCON_USB, otg_enabled);
+	if (ret < 0)
+		dev_err(bdi->dev, "Can't set extcon state to %d: %d\n",
+			otg_enabled, ret);
+
+	return ret;
+}
+
 static void bq24190_check_status(struct bq24190_dev_info *bdi)
 {
 	const u8 battery_mask_ss = BQ24190_REG_SS_CHRG_STAT_MASK;
@@ -1597,8 +1618,10 @@ static void bq24190_check_status(struct bq24190_dev_info *bdi)
 		bdi->ss_reg = ss_reg;
 	}
 
-	if (alert_charger || alert_battery)
+	if (alert_charger || alert_battery) {
 		power_supply_changed(bdi->charger);
+		bq24190_configure_usb_otg(bdi, ss_reg);
+	}
 	if (alert_battery && bdi->battery)
 		power_supply_changed(bdi->battery);
 
@@ -1732,6 +1755,14 @@ static int bq24190_probe(struct i2c_client *client,
 		return -EINVAL;
 	}
 
+	bdi->edev = devm_extcon_dev_allocate(dev, bq24190_usb_extcon_cable);
+	if (IS_ERR(bdi->edev))
+		return PTR_ERR(bdi->edev);
+
+	ret = devm_extcon_dev_register(dev, bdi->edev);
+	if (ret < 0)
+		return ret;
+
 	pm_runtime_enable(dev);
 	pm_runtime_use_autosuspend(dev);
 	pm_runtime_set_autosuspend_delay(dev, 600);
@@ -1778,6 +1809,10 @@ static int bq24190_probe(struct i2c_client *client,
 		goto out_charger;
 	}
 
+	ret = bq24190_configure_usb_otg(bdi, bdi->ss_reg);
+	if (ret < 0)
+		goto out_charger;
+
 	ret = bq24190_sysfs_create_group(bdi);
 	if (ret < 0) {
 		dev_err(dev, "Can't create sysfs entries\n");
-- 
2.17.2

Re: [PATCH v2 4/7] power: supply: bq24190_charger: add extcon support for USB OTG

[Sebastian Reichel]

[-- Attachment #1: Type: text/plain, Size: 3457 bytes --]

Hi,

On Wed, Oct 31, 2018 at 08:11:46PM -0400, Brian Masney wrote:
> Add extcon support so that we can notify USB drivers of cable state
> changes. Based on work from Jonathan Marek. USB OTG was tested on a LG
> Nexus 5 (hammerhead) phone.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---

Thanks, queued.

-- Sebastian

>  drivers/power/supply/bq24190_charger.c | 37 +++++++++++++++++++++++++-
>  1 file changed, 36 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> index 9e7f3e33458a..4e64e6ac95c5 100644
> --- a/drivers/power/supply/bq24190_charger.c
> +++ b/drivers/power/supply/bq24190_charger.c
> @@ -21,6 +21,7 @@
>  #include <linux/workqueue.h>
>  #include <linux/gpio.h>
>  #include <linux/i2c.h>
> +#include <linux/extcon-provider.h>
>  
>  #define	BQ24190_MANUFACTURER	"Texas Instruments"
>  
> @@ -159,6 +160,7 @@
>  struct bq24190_dev_info {
>  	struct i2c_client		*client;
>  	struct device			*dev;
> +	struct extcon_dev		*edev;
>  	struct power_supply		*charger;
>  	struct power_supply		*battery;
>  	struct delayed_work		input_current_limit_work;
> @@ -174,6 +176,11 @@ struct bq24190_dev_info {
>  	u8				watchdog;
>  };
>  
> +static const unsigned int bq24190_usb_extcon_cable[] = {
> +	EXTCON_USB,
> +	EXTCON_NONE,
> +};
> +
>  /*
>   * The tables below provide a 2-way mapping for the value that goes in
>   * the register field and the real-world value that it represents.
> @@ -1528,6 +1535,20 @@ static const struct power_supply_desc bq24190_battery_desc = {
>  	.property_is_writeable	= bq24190_battery_property_is_writeable,
>  };
>  
> +static int bq24190_configure_usb_otg(struct bq24190_dev_info *bdi, u8 ss_reg)
> +{
> +	bool otg_enabled;
> +	int ret;
> +
> +	otg_enabled = !!(ss_reg & BQ24190_REG_SS_VBUS_STAT_MASK);
> +	ret = extcon_set_state_sync(bdi->edev, EXTCON_USB, otg_enabled);
> +	if (ret < 0)
> +		dev_err(bdi->dev, "Can't set extcon state to %d: %d\n",
> +			otg_enabled, ret);
> +
> +	return ret;
> +}
> +
>  static void bq24190_check_status(struct bq24190_dev_info *bdi)
>  {
>  	const u8 battery_mask_ss = BQ24190_REG_SS_CHRG_STAT_MASK;
> @@ -1597,8 +1618,10 @@ static void bq24190_check_status(struct bq24190_dev_info *bdi)
>  		bdi->ss_reg = ss_reg;
>  	}
>  
> -	if (alert_charger || alert_battery)
> +	if (alert_charger || alert_battery) {
>  		power_supply_changed(bdi->charger);
> +		bq24190_configure_usb_otg(bdi, ss_reg);
> +	}
>  	if (alert_battery && bdi->battery)
>  		power_supply_changed(bdi->battery);
>  
> @@ -1732,6 +1755,14 @@ static int bq24190_probe(struct i2c_client *client,
>  		return -EINVAL;
>  	}
>  
> +	bdi->edev = devm_extcon_dev_allocate(dev, bq24190_usb_extcon_cable);
> +	if (IS_ERR(bdi->edev))
> +		return PTR_ERR(bdi->edev);
> +
> +	ret = devm_extcon_dev_register(dev, bdi->edev);
> +	if (ret < 0)
> +		return ret;
> +
>  	pm_runtime_enable(dev);
>  	pm_runtime_use_autosuspend(dev);
>  	pm_runtime_set_autosuspend_delay(dev, 600);
> @@ -1778,6 +1809,10 @@ static int bq24190_probe(struct i2c_client *client,
>  		goto out_charger;
>  	}
>  
> +	ret = bq24190_configure_usb_otg(bdi, bdi->ss_reg);
> +	if (ret < 0)
> +		goto out_charger;
> +
>  	ret = bq24190_sysfs_create_group(bdi);
>  	if (ret < 0) {
>  		dev_err(dev, "Can't create sysfs entries\n");
> -- 
> 2.17.2
> 

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[PATCH v2 5/7] pinctrl: qcom: spmi-gpio: fix gpio-hog related boot issues

[Brian Masney]

When attempting to setup up a gpio hog, device probing would repeatedly
fail with -EPROBE_DEFERED errors. It was caused by a circular dependency
between the gpio and pinctrl frameworks. If the gpio-ranges property is
present in device tree, then the gpio framework will handle the gpio pin
registration and eliminate the circular dependency.

See Christian Lamparter's commit a86caa9ba5d7 ("pinctrl: msm: fix
gpio-hog related boot issues") for a detailed commit message that
explains the issue in much more detail. The code comment in this commit
came from Christian's commit.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/pinctrl/qcom/pinctrl-spmi-gpio.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
index a29efbe08f48..4c1ff9a1d156 100644
--- a/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
+++ b/drivers/pinctrl/qcom/pinctrl-spmi-gpio.c
@@ -1028,10 +1028,23 @@ static int pmic_gpio_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0, npins);
-	if (ret) {
-		dev_err(dev, "failed to add pin range\n");
-		goto err_range;
+	/*
+	 * For DeviceTree-supported systems, the gpio core checks the
+	 * pinctrl's device node for the "gpio-ranges" property.
+	 * If it is present, it takes care of adding the pin ranges
+	 * for the driver. In this case the driver can skip ahead.
+	 *
+	 * In order to remain compatible with older, existing DeviceTree
+	 * files which don't set the "gpio-ranges" property or systems that
+	 * utilize ACPI the driver has to call gpiochip_add_pin_range().
+	 */
+	if (!of_property_read_bool(dev->of_node, "gpio-ranges")) {
+		ret = gpiochip_add_pin_range(&state->chip, dev_name(dev), 0, 0,
+					     npins);
+		if (ret) {
+			dev_err(dev, "failed to add pin range\n");
+			goto err_range;
+		}
 	}
 
 	return 0;
-- 
2.17.2

Re: [PATCH v2 5/7] pinctrl: qcom: spmi-gpio: fix gpio-hog related boot issues

[Linus Walleij]

On Thu, Nov 1, 2018 at 1:12 AM Brian Masney <masneyb@onstation.org> wrote:

> When attempting to setup up a gpio hog, device probing would repeatedly
> fail with -EPROBE_DEFERED errors. It was caused by a circular dependency
> between the gpio and pinctrl frameworks. If the gpio-ranges property is
> present in device tree, then the gpio framework will handle the gpio pin
> registration and eliminate the circular dependency.
>
> See Christian Lamparter's commit a86caa9ba5d7 ("pinctrl: msm: fix
> gpio-hog related boot issues") for a detailed commit message that
> explains the issue in much more detail. The code comment in this commit
> came from Christian's commit.
>
> Signed-off-by: Brian Masney <masneyb@onstation.org>

No word from Bjorn but I trust my own intuition and applied it.

Björn: shout if it's wrong.

Question: should this also be done for pinctrl-ssbi-gpio.c?

Yours,
Linus Walleij

Re: [PATCH v2 5/7] pinctrl: qcom: spmi-gpio: fix gpio-hog related boot issues

[Brian Masney]

On Fri, Nov 09, 2018 at 09:59:08AM +0100, Linus Walleij wrote:
> On Thu, Nov 1, 2018 at 1:12 AM Brian Masney <masneyb@onstation.org> wrote:
> 
> > When attempting to setup up a gpio hog, device probing would repeatedly
> > fail with -EPROBE_DEFERED errors. It was caused by a circular dependency
> > between the gpio and pinctrl frameworks. If the gpio-ranges property is
> > present in device tree, then the gpio framework will handle the gpio pin
> > registration and eliminate the circular dependency.
> >
> > See Christian Lamparter's commit a86caa9ba5d7 ("pinctrl: msm: fix
> > gpio-hog related boot issues") for a detailed commit message that
> > explains the issue in much more detail. The code comment in this commit
> > came from Christian's commit.
> >
> > Signed-off-by: Brian Masney <masneyb@onstation.org>
> 
> No word from Bjorn but I trust my own intuition and applied it.
> 
> Björn: shout if it's wrong.
> 
> Question: should this also be done for pinctrl-ssbi-gpio.c?

Yes, I believe so.

Brian

[PATCH v2 6/7] ARM: dts: qcom: msm8974: add gpio-ranges

[Brian Masney]

This adds the gpio-ranges property to pm8941_gpios so that the GPIO
pins are initialized by the GPIO framework and not pinctrl. This fixes
a circular dependency so GPIO hogging can be used on this board.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 arch/arm/boot/dts/qcom-pm8941.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/qcom-pm8941.dtsi b/arch/arm/boot/dts/qcom-pm8941.dtsi
index 2515c5c217ac..9a91b758f7aa 100644
--- a/arch/arm/boot/dts/qcom-pm8941.dtsi
+++ b/arch/arm/boot/dts/qcom-pm8941.dtsi
@@ -63,6 +63,7 @@
 			compatible = "qcom,pm8941-gpio", "qcom,spmi-gpio";
 			reg = <0xc000>;
 			gpio-controller;
+			gpio-ranges = <&pm8941_gpios 0 0 36>;
 			#gpio-cells = <2>;
 			interrupts = <0 0xc0 0 IRQ_TYPE_NONE>,
 				     <0 0xc1 0 IRQ_TYPE_NONE>,
-- 
2.17.2

Re: [PATCH v2 6/7] ARM: dts: qcom: msm8974: add gpio-ranges

[Brian Masney]

On Wed, Oct 31, 2018 at 08:11:48PM -0400, Brian Masney wrote:
> This adds the gpio-ranges property to pm8941_gpios so that the GPIO
> pins are initialized by the GPIO framework and not pinctrl. This fixes
> a circular dependency so GPIO hogging can be used on this board.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>

Hi Andy,

All of the dependencies for USB have been merged into their respective
trees. Patches 6 and 7 in this series are the only two that are
outstanding for your consideration.

I know that I'm still waiting for a review from Dmitry regarding the new
vibrator driver [1] and we're nearing the end of the development cycle.
In case he runs into an issue with that driver, I verified that I can use
git am to apply patches 6 and 7 in this series for USB, and the patch
for WiFi [2] without the bindings for the vibrator. I'm hoping to get as
much of this merged into this kernel development cycle as possible.

[1] https://lore.kernel.org/lkml/20181025012937.2154-1-masneyb@onstation.org/
[2] https://lore.kernel.org/lkml/20181104215034.3677-1-masneyb@onstation.org/

Thanks,

Brian

[PATCH v2 7/7] ARM: dts: qcom: msm8974-hammerhead: add USB OTG support

[Brian Masney]

Add the device tree bindings for USB OTG support. Driver was tested
using on a LG Nexus 5 (hammerhead) phone. This patch is based on work
from Jonathan Marek and from the other msm8974 devices.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 .../qcom-msm8974-lge-nexus5-hammerhead.dts    | 60 +++++++++++++++++++
 arch/arm/boot/dts/qcom-msm8974.dtsi           | 11 ++++
 2 files changed, 71 insertions(+)

diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
index ed8f064d0895..f67ab43956dc 100644
--- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
@@ -242,6 +242,16 @@
 			};
 		};
 
+		i2c1_pins: i2c1 {
+			mux {
+				pins = "gpio2", "gpio3";
+				function = "blsp_i2c1";
+
+				drive-strength = <2>;
+				bias-disable;
+			};
+		};
+
 		i2c3_pins: i2c3 {
 			mux {
 				pins = "gpio10", "gpio11";
@@ -343,6 +353,24 @@
 		};
 	};
 
+	i2c@f9923000 {
+		status = "ok";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c1_pins>;
+		clock-frequency = <100000>;
+		qcom,src-freq = <50000000>;
+
+		charger: bq24192@6b {
+			compatible = "ti,bq24192";
+			reg = <0x6b>;
+			interrupts-extended = <&spmi_bus 0 0xd5 0 IRQ_TYPE_EDGE_FALLING>;
+
+			omit-battery-class;
+
+			usb_otg_vbus: usb-otg-vbus { };
+		};
+	};
+
 	i2c@f9925000 {
 		status = "ok";
 		pinctrl-names = "default";
@@ -360,6 +388,31 @@
 			amstaos,proximity-diodes = <0>;
 		};
 	};
+
+	usb@f9a55000 {
+		status = "ok";
+
+		phys = <&usb_hs1_phy>;
+		phy-select = <&tcsr 0xb000 0>;
+
+		extcon = <&charger>, <&usb_id>;
+		vbus-supply = <&usb_otg_vbus>;
+
+		hnp-disable;
+		srp-disable;
+		adp-disable;
+
+		ulpi {
+			phy@a {
+				status = "ok";
+
+				v1p8-supply = <&pm8941_l6>;
+				v3p3-supply = <&pm8941_l24>;
+
+				qcom,init-seq = /bits/ 8 <0x1 0x64>;
+			};
+		};
+	};
 };
 
 &spmi_bus {
@@ -372,6 +425,13 @@
 				bias-pull-up;
 				power-source = <PM8941_GPIO_S3>;
 			};
+
+			otg {
+				gpio-hog;
+				gpios = <35 GPIO_ACTIVE_HIGH>;
+				output-high;
+				line-name = "otg-gpio";
+			};
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
index aba159d5a95a..8294192db9eb 100644
--- a/arch/arm/boot/dts/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
@@ -704,6 +704,17 @@
 			interrupts = <GIC_SPI 208 IRQ_TYPE_LEVEL_HIGH>;
 		};
 
+		i2c@f9923000 {
+			status = "disabled";
+			compatible = "qcom,i2c-qup-v2.1.1";
+			reg = <0xf9923000 0x1000>;
+			interrupts = <0 95 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&gcc GCC_BLSP1_QUP1_I2C_APPS_CLK>, <&gcc GCC_BLSP1_AHB_CLK>;
+			clock-names = "core", "iface";
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
 		i2c@f9924000 {
 			status = "disabled";
 			compatible = "qcom,i2c-qup-v2.1.1";
-- 
2.17.2