[PATCH v4] extcon: Palmas Extcon Driver
Kishon Vijay Abraham I
kishon at ti.com
Tue May 7 16:25:25 EST 2013
Hi,
On Tuesday 07 May 2013 11:40 AM, Chanwoo Choi wrote:
> Hi Kishon,
>
> I add some opinion about this patch.
>
> On 05/06/2013 10:17 PM, Kishon Vijay Abraham I wrote:
>> From: Graeme Gregory <gg at slimlogic.co.uk>
>>
>> This is the driver for the USB comparator built into the palmas chip. It
>> handles the various USB OTG events that can be generated by cable
>> insertion/removal.
>>
>> Signed-off-by: Graeme Gregory <gg at slimlogic.co.uk>
>> Signed-off-by: Moiz Sonasath <m-sonasath at ti.com>
>> Signed-off-by: Ruchika Kharwar <ruchika at ti.com>
>> Signed-off-by: Kishon Vijay Abraham I <kishon at ti.com>
>> [kishon at ti.com: adapted palmas usb driver to use the extcon framework]
>> Signed-off-by: Sebastien Guiriec <s-guiriec at ti.com>
>> ---
>> Changes from v3:
>> * adapted the driver to extcon framework (so moved to drivers/extcon)
>> * removed palmas_usb_(write/read) and replaced all calls with
>> palmas_(read/write).
>> * ignored a checkpatch warning in the line
>> static const char *palmas_extcon_cable[] = {
>> as it seemed to be incorrect?
>> * removed all references to OMAP in this driver.
>> * couldn't test this driver with mainline as omap5 panda is not booting
>> with mainline.
>> * A comment to change to platform_get_irq from regmap is not done as I felt
>> the data should come from regmap in this case. Graeme?
>> Changes from v2:
>> * Moved the driver to drivers/usb/phy/
>> * Added a bit more explanation in Kconfig
>> .../devicetree/bindings/extcon/extcon-twl.txt | 17 +
>> drivers/extcon/Kconfig | 7 +
>> drivers/extcon/Makefile | 1 +
>> drivers/extcon/extcon-palmas.c | 389 ++++++++++++++++++++
>> include/linux/extcon/extcon_palmas.h | 26 ++
>> include/linux/mfd/palmas.h | 8 +-
>> 6 files changed, 447 insertions(+), 1 deletion(-)
>> create mode 100644 Documentation/devicetree/bindings/extcon/extcon-twl.txt
>> create mode 100644 drivers/extcon/extcon-palmas.c
>> create mode 100644 include/linux/extcon/extcon_palmas.h
>>
>> diff --git a/Documentation/devicetree/bindings/extcon/extcon-twl.txt b/Documentation/devicetree/bindings/extcon/extcon-twl.txt
>> new file mode 100644
>> index 0000000..a7f6527
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/extcon/extcon-twl.txt
>> @@ -0,0 +1,17 @@
>> +EXTCON FOR TWL CHIPS
>> +
>> +PALMAS USB COMPARATOR
>> +Required Properties:
>> + - compatible : Should be "ti,palmas-usb" or "ti,twl6035-usb"
>> + - vbus-supply : phandle to the regulator device tree node.
>> +
>> +Optional Properties:
>> + - ti,wakeup : To enable the wakeup comparator in probe
>> + - ti,no_control_vbus: if the platform wishes its own vbus control
>> +
>> +palmas-usb {
>> + compatible = "ti,twl6035-usb", "ti,palmas-usb";
>> + vbus-supply = <&smps10_reg>;
>> + ti,wakeup;
>> +};
>> +
>> diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
>> index 5168a13..c881899 100644
>> --- a/drivers/extcon/Kconfig
>> +++ b/drivers/extcon/Kconfig
>> @@ -53,4 +53,11 @@ config EXTCON_ARIZONA
>> with Wolfson Arizona devices. These are audio CODECs with
>> advanced audio accessory detection support.
>>
>> +config EXTCON_PALMAS
>> + tristate "Palmas USB EXTCON support"
>> + depends on MFD_PALMAS
>> + help
>> + Say Y here to enable support for USB peripheral and USB host
>> + detection by palmas usb.
>> +
>> endif # MULTISTATE_SWITCH
>> diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
>> index f98a3c4..540e2c3 100644
>> --- a/drivers/extcon/Makefile
>> +++ b/drivers/extcon/Makefile
>> @@ -8,3 +8,4 @@ obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o
>> obj-$(CONFIG_EXTCON_MAX77693) += extcon-max77693.o
>> obj-$(CONFIG_EXTCON_MAX8997) += extcon-max8997.o
>> obj-$(CONFIG_EXTCON_ARIZONA) += extcon-arizona.o
>> +obj-$(CONFIG_EXTCON_PALMAS) += extcon-palmas.o
>> diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c
>> new file mode 100644
>> index 0000000..3ef042f
>> --- /dev/null
>> +++ b/drivers/extcon/extcon-palmas.c
>> @@ -0,0 +1,389 @@
>> +/*
>> + * Palmas USB transceiver driver
>> + *
>> + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
>> + * 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 Free Software Foundation; either version 2 of the License, or
>> + * (at your option) any later version.
>> + *
>> + * Author: Graeme Gregory <gg at ...mlogic.co.uk>
>> + * Author: Kishon Vijay Abraham I <kishon at ...com>
>> + *
>> + * Based on twl6030_usb.c
>> + *
>> + * Author: Hema HK <hemahk at ...com>
>> + *
>> + * This program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + */
>> +
>> +#include <linux/module.h>
>> +#include <linux/init.h>
>> +#include <linux/interrupt.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/io.h>
>> +#include <linux/usb/phy_companion.h>
>> +#include <linux/regulator/consumer.h>
>> +#include <linux/err.h>
>> +#include <linux/notifier.h>
>> +#include <linux/slab.h>
>> +#include <linux/delay.h>
>> +#include <linux/mfd/palmas.h>
>> +#include <linux/of.h>
>> +#include <linux/of_platform.h>
>> +#include <linux/extcon/extcon_palmas.h>
>> +
> Remove unnecessary header file. When I remove following header file,
> I completed kernel build without any problem.
>
> linux/init.h
> linux/io.h
> linux/regulator/consumer.h
> linux/notifier.h
> linux/slab.h
> linux/delay.h
hmm.. ok.
>> +static const char *palmas_extcon_cable[] = {
>> + [0] = "USB",
>> + [1] = "USB-HOST",
>> + NULL,
>> +};
>> +
>> +static const int mutually_exclusive[] = {0x3, 0x0};
>> +
>> +static void palmas_usb_wakeup(struct palmas *palmas, int enable)
>> +{
>> + if (enable)
>> + palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP,
>> + PALMAS_USB_WAKEUP_ID_WK_UP_COMP);
>> + else
>> + palmas_write(palmas, PALMAS_USB_OTG_BASE, PALMAS_USB_WAKEUP, 0);
>> +}
>> +
>> +static ssize_t palmas_usb_vbus_show(struct device *dev,
>> + struct device_attribute *attr, char *buf)
>> +{
>> + unsigned long flags;
>> + int ret = -EINVAL;
>> + struct palmas_usb *palmas_usb = dev_get_drvdata(dev);
>> +
>> + spin_lock_irqsave(&palmas_usb->lock, flags);
>> +
>> + switch (palmas_usb->linkstat) {
>> + case PALMAS_USB_STATE_VBUS:
>> + ret = snprintf(buf, PAGE_SIZE, "vbus\n");
>> + break;
>> + case PALMAS_USB_STATE_ID:
>> + ret = snprintf(buf, PAGE_SIZE, "id\n");
>> + break;
>> + case PALMAS_USB_STATE_DISCONNECT:
>> + ret = snprintf(buf, PAGE_SIZE, "none\n");
>> + break;
>> + default:
>> + ret = snprintf(buf, PAGE_SIZE, "UNKNOWN\n");
>> + }
>> + spin_unlock_irqrestore(&palmas_usb->lock, flags);
>> +
>> + return ret;
>> +}
>> +static DEVICE_ATTR(vbus, 0444, palmas_usb_vbus_show, NULL);
> I think that 'palmas_usb_vbus' device attribute isn't standard node
> of extcon framework. If you want to check USB/USB-HOST state
> on user-space, user process should use following standard node
> of extcon instead of 'palmas_usb_vbus' node.
Ok. Makes sense.
>
> - User can get the state of USB/USB-HOST through following node:
> /sys/class/extcon/palmas_usb/cable.0/state
> if state is 1, PALMAS_USB_STATE_VBUS
> if state is 0, PALMAS_USB_STATE_DISCONNECT
>
> /sys/class/extcon/palmas_usb/cable.1/state
> if state is 1, PALMAS_USB_STATE_ID
> if state is 0, PALMAS_USB_STATE_DISCONNECT
>
> Certainly, extcon driver have to provide specific information of external connector through
> standard sysfs entry.
>> +
>> +static irqreturn_t palmas_vbus_wakeup_irq(int irq, void *_palmas_usb)
>> +{
>> + int ret;
>> + struct palmas_usb *palmas_usb = _palmas_usb;
>> + unsigned int vbus_line_state;
>> +
>> + palmas_read(palmas_usb->palmas, PALMAS_INTERRUPT_BASE,
>> + PALMAS_INT3_LINE_STATE, &vbus_line_state);
>> +
>> + if (vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS) {
>> + if (palmas_usb->linkstat != PALMAS_USB_STATE_VBUS) {
>> + if (palmas_usb->vbus_reg) {
>> + ret = regulator_enable(palmas_usb->vbus_reg);
>> + if (ret) {
>> + dev_dbg(palmas_usb->dev,
>> + "regulator enable failed\n");
>> + goto ret0;
>> + }
>> + }
>> + palmas_usb->linkstat = PALMAS_USB_STATE_VBUS;
>> + extcon_set_cable_state(&palmas_usb->edev, "USB", true);
>> + } else {
>> + dev_dbg(palmas_usb->dev,
>> + "Spurious connect event detected\n");
>> + }
>> + } else if (!(vbus_line_state & PALMAS_INT3_LINE_STATE_VBUS)) {
>> + if (palmas_usb->linkstat == PALMAS_USB_STATE_VBUS) {
>> + if (palmas_usb->vbus_reg)
>> + regulator_disable(palmas_usb->vbus_reg);
>> + palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
>> + extcon_set_cable_state(&palmas_usb->edev, "USB", false);
>> + } else {
>> + dev_dbg(palmas_usb->dev,
>> + "Spurious disconnect event detected\n");
>> + }
>> + }
>> +
>> +ret0:
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static irqreturn_t palmas_id_wakeup_irq(int irq, void *_palmas_usb)
>> +{
>> + int ret;
>> + unsigned int set;
>> + struct palmas_usb *palmas_usb = _palmas_usb;
>> +
>> + palmas_read(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_INT_LATCH_SET, &set);
>> +
>> + if (set & PALMAS_USB_ID_INT_SRC_ID_GND) {
>> + if (palmas_usb->vbus_reg) {
>> + ret = regulator_enable(palmas_usb->vbus_reg);
>> + if (ret) {
>> + dev_dbg(palmas_usb->dev,
>> + "regulator enable failed\n");
>> + goto ret0;
>> + }
>> + }
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_INT_EN_HI_SET,
>> + PALMAS_USB_ID_INT_EN_HI_SET_ID_FLOAT);
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_INT_EN_HI_CLR,
>> + PALMAS_USB_ID_INT_EN_HI_CLR_ID_GND);
>> + palmas_usb->linkstat = PALMAS_USB_STATE_ID;
>> + extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", true);
>> + } else if (set & PALMAS_USB_ID_INT_SRC_ID_FLOAT) {
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_INT_EN_HI_SET,
>> + PALMAS_USB_ID_INT_EN_HI_SET_ID_GND);
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_INT_EN_HI_CLR,
>> + PALMAS_USB_ID_INT_EN_HI_CLR_ID_FLOAT);
>> + if (palmas_usb->vbus_reg)
>> + regulator_disable(palmas_usb->vbus_reg);
>> + palmas_usb->linkstat = PALMAS_USB_STATE_DISCONNECT;
>> + extcon_set_cable_state(&palmas_usb->edev, "USB-HOST", false);
>> + }
>> +
>> +ret0:
>> + return IRQ_HANDLED;
>> +}
>> +
>> +static void palmas_enable_irq(struct palmas_usb *palmas_usb)
>> +{
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_VBUS_CTRL_SET,
>> + PALMAS_USB_VBUS_CTRL_SET_VBUS_ACT_COMP);
>> +
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_CTRL_SET, PALMAS_USB_ID_CTRL_SET_ID_ACT_COMP);
>> +
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_ID_INT_EN_HI_SET,
>> + PALMAS_USB_ID_INT_EN_HI_SET_ID_GND);
>> +
>> + palmas_vbus_wakeup_irq(palmas_usb->irq4, palmas_usb);
>> + palmas_id_wakeup_irq(palmas_usb->irq2, palmas_usb);
>> +}
>> +
>> +static void palmas_set_vbus_work(struct work_struct *data)
>> +{
>> + int ret;
>> + struct palmas_usb *palmas_usb = container_of(data, struct palmas_usb,
>> + set_vbus_work);
>> +
>> + if (IS_ERR_OR_NULL(palmas_usb->vbus_reg)) {
>> + dev_err(palmas_usb->dev, "invalid regulator\n");
>> + return;
>> + }
>> +
>> + /*
>> + * Start driving VBUS. Set OPA_MODE bit in CHARGERUSB_CTRL1
>> + * register. This enables boost mode.
>> + */
>> +
>> + if (palmas_usb->vbus_enable) {
>> + ret = regulator_enable(palmas_usb->vbus_reg);
>> + if (ret)
>> + dev_dbg(palmas_usb->dev, "regulator enable failed\n");
>> + } else {
>> + regulator_disable(palmas_usb->vbus_reg);
>> + }
>> +}
>> +
>> +static int palmas_set_vbus(struct phy_companion *comparator, bool enabled)
>> +{
>> + struct palmas_usb *palmas_usb = comparator_to_palmas(comparator);
>> +
>> + palmas_usb->vbus_enable = enabled;
>> + schedule_work(&palmas_usb->set_vbus_work);
>> +
>> + return 0;
>> +}
>> +
>> +static int palmas_start_srp(struct phy_companion *comparator)
>> +{
>> + struct palmas_usb *palmas_usb = comparator_to_palmas(comparator);
>> +
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_VBUS_CTRL_SET, PALMAS_USB_VBUS_CTRL_SET_VBUS_DISCHRG
>> + | PALMAS_USB_VBUS_CTRL_SET_VBUS_IADP_SINK);
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_VBUS_CTRL_SET,
>> + PALMAS_USB_VBUS_CTRL_SET_VBUS_CHRG_VSYS |
>> + PALMAS_USB_VBUS_CTRL_SET_VBUS_IADP_SINK);
>> +
>> + mdelay(100);
>> +
>> + palmas_write(palmas_usb->palmas, PALMAS_USB_OTG_BASE,
>> + PALMAS_USB_VBUS_CTRL_CLR,
>> + PALMAS_USB_VBUS_CTRL_SET_VBUS_CHRG_VSYS |
>> + PALMAS_USB_VBUS_CTRL_SET_VBUS_CHRG_VSYS);
>> +
>> + return 0;
>> +}
>> +
>> +static void palmas_dt_to_pdata(struct device_node *node,
>> + struct palmas_usb_platform_data *pdata)
>> +{
>> + pdata->no_control_vbus = of_property_read_bool(node,
>> + "ti,no_control_vbus");
>> + pdata->wakeup = of_property_read_bool(node, "ti,wakeup");
>> +}
>> +
>> +static int palmas_usb_probe(struct platform_device *pdev)
>> +{
>> + u32 ret;
>> + struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
>> + struct palmas_usb_platform_data *pdata = pdev->dev.platform_data;
>> + struct device_node *node = pdev->dev.of_node;
>> + struct palmas_usb *palmas_usb;
>> + int status;
>> +
>> + if (node && !pdata) {
>> + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
>> +
>> + if (!pdata)
>> + return -ENOMEM;
>> +
>> + palmas_dt_to_pdata(node, pdata);
>> + }
>> +
>> + if (!pdata)
>> + return -EINVAL;
>> +
>> + palmas_usb = devm_kzalloc(&pdev->dev, sizeof(*palmas_usb), GFP_KERNEL);
>> + if (!palmas_usb)
>> + return -ENOMEM;
>> +
>> + palmas->usb = palmas_usb;
>> + palmas_usb->palmas = palmas;
>> +
>> + palmas_usb->dev = &pdev->dev;
>> +
>> + palmas_usb->irq1 = regmap_irq_get_virq(palmas->irq_data,
>> + PALMAS_ID_OTG_IRQ);
>> + palmas_usb->irq2 = regmap_irq_get_virq(palmas->irq_data,
>> + PALMAS_ID_IRQ);
>> + palmas_usb->irq3 = regmap_irq_get_virq(palmas->irq_data,
>> + PALMAS_VBUS_OTG_IRQ);
>> + palmas_usb->irq4 = regmap_irq_get_virq(palmas->irq_data,
>> + PALMAS_VBUS_IRQ);
>> +
>> + palmas_usb->comparator.set_vbus = palmas_set_vbus;
>> + palmas_usb->comparator.start_srp = palmas_start_srp;
>> +
>> + palmas_usb_wakeup(palmas, pdata->wakeup);
>> +
>> + /* init spinlock for workqueue */
>> + spin_lock_init(&palmas_usb->lock);
>> +
>> + if (!pdata->no_control_vbus) {
>> + palmas_usb->vbus_reg = devm_regulator_get(&pdev->dev, "vbus");
>> + if (IS_ERR(palmas_usb->vbus_reg)) {
>> + dev_err(&pdev->dev, "vbus init failed\n");
>> + return PTR_ERR(palmas_usb->vbus_reg);
>> + }
>> + }
>> +
>> + platform_set_drvdata(pdev, palmas_usb);
>> +
>> + if (device_create_file(&pdev->dev, &dev_attr_vbus))
>> + dev_warn(&pdev->dev, "could not create sysfs file\n");
> device_create_file() isn't needed if remove 'palmas_usb_vbus' sysfs entry.
right.
>> +
>> + palmas_usb->edev.name = "palmas_usb";
> I prefer '-' instead of '_'. change from "palmas_usb" to "palmas-usb".
>> + palmas_usb->edev.supported_cable = palmas_extcon_cable;
>> + palmas_usb->edev.mutually_exclusive = mutually_exclusive;
>> +
>> + ret = extcon_dev_register(&palmas_usb->edev, palmas_usb->dev);
>> + if (ret) {
>> + dev_err(&pdev->dev, "failed to register extcon device\n");
>> + return ret;
>> + }
>> +
>> + /* init spinlock for workqueue */
>> + spin_lock_init(&palmas_usb->lock);
>> +
>> + INIT_WORK(&palmas_usb->set_vbus_work, palmas_set_vbus_work);
>> +
>> + status = devm_request_threaded_irq(palmas_usb->dev, palmas_usb->irq2,
>> + NULL, palmas_id_wakeup_irq,
>> + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
>> + "palmas_usb", palmas_usb);
>> + if (status < 0) {
>> + dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
>> + palmas_usb->irq2, status);
>> + goto fail_irq;
>> + }
>> +
>> + status = devm_request_threaded_irq(palmas_usb->dev, palmas_usb->irq4,
>> + NULL, palmas_vbus_wakeup_irq,
>> + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
>> + "palmas_usb", palmas_usb);
>> + if (status < 0) {
>> + dev_err(&pdev->dev, "can't get IRQ %d, err %d\n",
>> + palmas_usb->irq4, status);
>> + goto fail_irq;
>> + }
>> +
>> + palmas_enable_irq(palmas_usb);
>> +
>> + return 0;
>> +
>> +fail_irq:
>> + cancel_work_sync(&palmas_usb->set_vbus_work);
>> + device_remove_file(palmas_usb->dev, &dev_attr_vbus);
> ditto.
>> +
>> + return status;
>> +}
>> +
>> +static int palmas_usb_remove(struct platform_device *pdev)
>> +{
>> + struct palmas_usb *palmas_usb = platform_get_drvdata(pdev);
>> +
>> + device_remove_file(palmas_usb->dev, &dev_attr_vbus);
> ditto.
>> + cancel_work_sync(&palmas_usb->set_vbus_work);
>> + extcon_dev_unregister(&palmas_usb->edev);
>> +
>> + return 0;
>> +}
>> +
>> +static struct of_device_id of_palmas_match_tbl[] = {
>> + { .compatible = "ti,palmas-usb", },
>> + { .compatible = "ti,twl6035-usb", },
>> + { /* end */ }
>> +};
>> +
>> +static struct platform_driver palmas_usb_driver = {
>> + .probe = palmas_usb_probe,
>> + .remove = palmas_usb_remove,
>> + .driver = {
>> + .name = "palmas-usb",
>> + .of_match_table = of_palmas_match_tbl,
>> + .owner = THIS_MODULE,
>> + },
>> +};
>> +
>> +module_platform_driver(palmas_usb_driver);
>> +
>> +MODULE_ALIAS("platform:palmas-usb");
>> +MODULE_AUTHOR("Graeme Gregory <gg at ...mlogic.co.uk>");
>> +MODULE_DESCRIPTION("Palmas USB transceiver driver");
>> +MODULE_LICENSE("GPL");
>> +MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);
>> diff --git a/include/linux/extcon/extcon_palmas.h b/include/linux/extcon/extcon_palmas.h
>> new file mode 100644
>> index 0000000..a5119c9
>> --- /dev/null
>> +++ b/include/linux/extcon/extcon_palmas.h
>> @@ -0,0 +1,26 @@
>> +/*
>> + * extcon_palmas.h - palmas extcon driver to detect VBUS or ID events
>> + *
>> + * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com
>> + * 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 Free Software Foundation; either version 2 of the License, or
>> + * (at your option) any later version.
>> + *
>> + * Author: Kishon Vijay Abraham I <kishon at ti.com>
>> + *
>> + * This program is distributed in the hope that it will be useful,
>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>> + * GNU General Public License for more details.
>> + *
>> + */
>> +
>> +#ifndef __EXTCON_PALMAS_H__
>> +#define __EXTCON_PALMAS_H__
>> +
>> +#define PALMAS_USB_STATE_DISCONNECT 0x0
>> +#define PALMAS_USB_STATE_VBUS BIT(0)
>> +#define PALMAS_USB_STATE_ID BIT(1)
>> +
> The defined variable in extcon_palmas.h is used only on extcon-palmas.c.
> So, I would like to move definition from extcon_palmas.h to extcon-palmas.c
> and remove extcon_palmas.h header file.
Actually it has to be used in dwc3-omap.c (that was in a different patch).
Thanks
Kishon
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