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From:   Linus Walleij <linus.walleij@linaro.org>
To:     linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Arnd Bergmann <arnd@arndb.de>
Cc:     Linus Walleij <linus.walleij@linaro.org>,
        =?UTF-8?q?Pawe=C5=82=20Chmiel?= <pawel.mikolaj.chmiel@gmail.com>,
        Chanwoo Choi <cw00.choi@samsung.com>
Subject: [PATCH] misc: fsa9480: Delete this driver
Date:   Sun, 30 Jun 2019 16:03:02 +0200
Message-Id: <20190630140302.16245-1-linus.walleij@linaro.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The FSA9480 has a new driver more appropriately located
in the drivers/extcon subsystem. It is also more complete
and includes device tree support. Delete the old misc
driver.

Cc: Paweł Chmiel <pawel.mikolaj.chmiel@gmail.com>
Cc: Chanwoo Choi <cw00.choi@samsung.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 drivers/misc/Kconfig                  |   9 -
 drivers/misc/Makefile                 |   1 -
 drivers/misc/fsa9480.c                | 547 --------------------------
 include/linux/platform_data/fsa9480.h |  24 --
 4 files changed, 581 deletions(-)
 delete mode 100644 drivers/misc/fsa9480.c
 delete mode 100644 include/linux/platform_data/fsa9480.h

diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 85fc77148d19..88e59bb1b06f 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -431,15 +431,6 @@ config PCH_PHUB
 	  To compile this driver as a module, choose M here: the module will
 	  be called pch_phub.
 
-config USB_SWITCH_FSA9480
-	tristate "FSA9480 USB Switch"
-	depends on I2C
-	help
-	  The FSA9480 is a USB port accessory detector and switch.
-	  The FSA9480 is fully controlled using I2C and enables USB data,
-	  stereo and mono audio, video, microphone and UART data to use
-	  a common connector port.
-
 config LATTICE_ECP3_CONFIG
 	tristate "Lattice ECP3 FPGA bitstream configuration via SPI"
 	depends on SPI && SYSFS
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index b9affcdaa3d6..95440c335dd4 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -42,7 +42,6 @@ obj-$(CONFIG_VMWARE_BALLOON)	+= vmw_balloon.o
 obj-$(CONFIG_PCH_PHUB)		+= pch_phub.o
 obj-y				+= ti-st/
 obj-y				+= lis3lv02d/
-obj-$(CONFIG_USB_SWITCH_FSA9480) += fsa9480.o
 obj-$(CONFIG_ALTERA_STAPL)	+=altera-stapl/
 obj-$(CONFIG_INTEL_MEI)		+= mei/
 obj-$(CONFIG_VMWARE_VMCI)	+= vmw_vmci/
diff --git a/drivers/misc/fsa9480.c b/drivers/misc/fsa9480.c
deleted file mode 100644
index fab02f2da077..000000000000
--- a/drivers/misc/fsa9480.c
+++ /dev/null
@@ -1,547 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * fsa9480.c - FSA9480 micro USB switch device driver
- *
- * Copyright (C) 2010 Samsung Electronics
- * Minkyu Kang <mk7.kang@samsung.com>
- * Wonguk Jeong <wonguk.jeong@samsung.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/i2c.h>
-#include <linux/platform_data/fsa9480.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-#include <linux/workqueue.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/pm_runtime.h>
-
-/* FSA9480 I2C registers */
-#define FSA9480_REG_DEVID		0x01
-#define FSA9480_REG_CTRL		0x02
-#define FSA9480_REG_INT1		0x03
-#define FSA9480_REG_INT2		0x04
-#define FSA9480_REG_INT1_MASK		0x05
-#define FSA9480_REG_INT2_MASK		0x06
-#define FSA9480_REG_ADC			0x07
-#define FSA9480_REG_TIMING1		0x08
-#define FSA9480_REG_TIMING2		0x09
-#define FSA9480_REG_DEV_T1		0x0a
-#define FSA9480_REG_DEV_T2		0x0b
-#define FSA9480_REG_BTN1		0x0c
-#define FSA9480_REG_BTN2		0x0d
-#define FSA9480_REG_CK			0x0e
-#define FSA9480_REG_CK_INT1		0x0f
-#define FSA9480_REG_CK_INT2		0x10
-#define FSA9480_REG_CK_INTMASK1		0x11
-#define FSA9480_REG_CK_INTMASK2		0x12
-#define FSA9480_REG_MANSW1		0x13
-#define FSA9480_REG_MANSW2		0x14
-
-/* Control */
-#define CON_SWITCH_OPEN		(1 << 4)
-#define CON_RAW_DATA		(1 << 3)
-#define CON_MANUAL_SW		(1 << 2)
-#define CON_WAIT		(1 << 1)
-#define CON_INT_MASK		(1 << 0)
-#define CON_MASK		(CON_SWITCH_OPEN | CON_RAW_DATA | \
-				CON_MANUAL_SW | CON_WAIT)
-
-/* Device Type 1 */
-#define DEV_USB_OTG		(1 << 7)
-#define DEV_DEDICATED_CHG	(1 << 6)
-#define DEV_USB_CHG		(1 << 5)
-#define DEV_CAR_KIT		(1 << 4)
-#define DEV_UART		(1 << 3)
-#define DEV_USB			(1 << 2)
-#define DEV_AUDIO_2		(1 << 1)
-#define DEV_AUDIO_1		(1 << 0)
-
-#define DEV_T1_USB_MASK		(DEV_USB_OTG | DEV_USB)
-#define DEV_T1_UART_MASK	(DEV_UART)
-#define DEV_T1_CHARGER_MASK	(DEV_DEDICATED_CHG | DEV_USB_CHG)
-
-/* Device Type 2 */
-#define DEV_AV			(1 << 6)
-#define DEV_TTY			(1 << 5)
-#define DEV_PPD			(1 << 4)
-#define DEV_JIG_UART_OFF	(1 << 3)
-#define DEV_JIG_UART_ON		(1 << 2)
-#define DEV_JIG_USB_OFF		(1 << 1)
-#define DEV_JIG_USB_ON		(1 << 0)
-
-#define DEV_T2_USB_MASK		(DEV_JIG_USB_OFF | DEV_JIG_USB_ON)
-#define DEV_T2_UART_MASK	(DEV_JIG_UART_OFF | DEV_JIG_UART_ON)
-#define DEV_T2_JIG_MASK		(DEV_JIG_USB_OFF | DEV_JIG_USB_ON | \
-				DEV_JIG_UART_OFF | DEV_JIG_UART_ON)
-
-/*
- * Manual Switch
- * D- [7:5] / D+ [4:2]
- * 000: Open all / 001: USB / 010: AUDIO / 011: UART / 100: V_AUDIO
- */
-#define SW_VAUDIO		((4 << 5) | (4 << 2))
-#define SW_UART			((3 << 5) | (3 << 2))
-#define SW_AUDIO		((2 << 5) | (2 << 2))
-#define SW_DHOST		((1 << 5) | (1 << 2))
-#define SW_AUTO			((0 << 5) | (0 << 2))
-
-/* Interrupt 1 */
-#define INT_DETACH		(1 << 1)
-#define INT_ATTACH		(1 << 0)
-
-struct fsa9480_usbsw {
-	struct i2c_client		*client;
-	struct fsa9480_platform_data	*pdata;
-	int				dev1;
-	int				dev2;
-	int				mansw;
-};
-
-static struct fsa9480_usbsw *chip;
-
-static int fsa9480_write_reg(struct i2c_client *client,
-		int reg, int value)
-{
-	int ret;
-
-	ret = i2c_smbus_write_byte_data(client, reg, value);
-
-	if (ret < 0)
-		dev_err(&client->dev, "%s: err %d\n", __func__, ret);
-
-	return ret;
-}
-
-static int fsa9480_read_reg(struct i2c_client *client, int reg)
-{
-	int ret;
-
-	ret = i2c_smbus_read_byte_data(client, reg);
-
-	if (ret < 0)
-		dev_err(&client->dev, "%s: err %d\n", __func__, ret);
-
-	return ret;
-}
-
-static int fsa9480_read_irq(struct i2c_client *client, int *value)
-{
-	int ret;
-
-	ret = i2c_smbus_read_i2c_block_data(client,
-			FSA9480_REG_INT1, 2, (u8 *)value);
-	*value &= 0xffff;
-
-	if (ret < 0)
-		dev_err(&client->dev, "%s: err %d\n", __func__, ret);
-
-	return ret;
-}
-
-static void fsa9480_set_switch(const char *buf)
-{
-	struct fsa9480_usbsw *usbsw = chip;
-	struct i2c_client *client = usbsw->client;
-	unsigned int value;
-	unsigned int path = 0;
-
-	value = fsa9480_read_reg(client, FSA9480_REG_CTRL);
-
-	if (!strncmp(buf, "VAUDIO", 6)) {
-		path = SW_VAUDIO;
-		value &= ~CON_MANUAL_SW;
-	} else if (!strncmp(buf, "UART", 4)) {
-		path = SW_UART;
-		value &= ~CON_MANUAL_SW;
-	} else if (!strncmp(buf, "AUDIO", 5)) {
-		path = SW_AUDIO;
-		value &= ~CON_MANUAL_SW;
-	} else if (!strncmp(buf, "DHOST", 5)) {
-		path = SW_DHOST;
-		value &= ~CON_MANUAL_SW;
-	} else if (!strncmp(buf, "AUTO", 4)) {
-		path = SW_AUTO;
-		value |= CON_MANUAL_SW;
-	} else {
-		printk(KERN_ERR "Wrong command\n");
-		return;
-	}
-
-	usbsw->mansw = path;
-	fsa9480_write_reg(client, FSA9480_REG_MANSW1, path);
-	fsa9480_write_reg(client, FSA9480_REG_CTRL, value);
-}
-
-static ssize_t fsa9480_get_switch(char *buf)
-{
-	struct fsa9480_usbsw *usbsw = chip;
-	struct i2c_client *client = usbsw->client;
-	unsigned int value;
-
-	value = fsa9480_read_reg(client, FSA9480_REG_MANSW1);
-
-	if (value == SW_VAUDIO)
-		return sprintf(buf, "VAUDIO\n");
-	else if (value == SW_UART)
-		return sprintf(buf, "UART\n");
-	else if (value == SW_AUDIO)
-		return sprintf(buf, "AUDIO\n");
-	else if (value == SW_DHOST)
-		return sprintf(buf, "DHOST\n");
-	else if (value == SW_AUTO)
-		return sprintf(buf, "AUTO\n");
-	else
-		return sprintf(buf, "%x", value);
-}
-
-static ssize_t fsa9480_show_device(struct device *dev,
-				   struct device_attribute *attr,
-				   char *buf)
-{
-	struct fsa9480_usbsw *usbsw = dev_get_drvdata(dev);
-	struct i2c_client *client = usbsw->client;
-	int dev1, dev2;
-
-	dev1 = fsa9480_read_reg(client, FSA9480_REG_DEV_T1);
-	dev2 = fsa9480_read_reg(client, FSA9480_REG_DEV_T2);
-
-	if (!dev1 && !dev2)
-		return sprintf(buf, "NONE\n");
-
-	/* USB */
-	if (dev1 & DEV_T1_USB_MASK || dev2 & DEV_T2_USB_MASK)
-		return sprintf(buf, "USB\n");
-
-	/* UART */
-	if (dev1 & DEV_T1_UART_MASK || dev2 & DEV_T2_UART_MASK)
-		return sprintf(buf, "UART\n");
-
-	/* CHARGER */
-	if (dev1 & DEV_T1_CHARGER_MASK)
-		return sprintf(buf, "CHARGER\n");
-
-	/* JIG */
-	if (dev2 & DEV_T2_JIG_MASK)
-		return sprintf(buf, "JIG\n");
-
-	return sprintf(buf, "UNKNOWN\n");
-}
-
-static ssize_t fsa9480_show_manualsw(struct device *dev,
-		struct device_attribute *attr, char *buf)
-{
-	return fsa9480_get_switch(buf);
-
-}
-
-static ssize_t fsa9480_set_manualsw(struct device *dev,
-				    struct device_attribute *attr,
-				    const char *buf, size_t count)
-{
-	fsa9480_set_switch(buf);
-
-	return count;
-}
-
-static DEVICE_ATTR(device, S_IRUGO, fsa9480_show_device, NULL);
-static DEVICE_ATTR(switch, S_IRUGO | S_IWUSR,
-		fsa9480_show_manualsw, fsa9480_set_manualsw);
-
-static struct attribute *fsa9480_attributes[] = {
-	&dev_attr_device.attr,
-	&dev_attr_switch.attr,
-	NULL
-};
-
-static const struct attribute_group fsa9480_group = {
-	.attrs = fsa9480_attributes,
-};
-
-static void fsa9480_detect_dev(struct fsa9480_usbsw *usbsw, int intr)
-{
-	int val1, val2, ctrl;
-	struct fsa9480_platform_data *pdata = usbsw->pdata;
-	struct i2c_client *client = usbsw->client;
-
-	val1 = fsa9480_read_reg(client, FSA9480_REG_DEV_T1);
-	val2 = fsa9480_read_reg(client, FSA9480_REG_DEV_T2);
-	ctrl = fsa9480_read_reg(client, FSA9480_REG_CTRL);
-
-	dev_info(&client->dev, "intr: 0x%x, dev1: 0x%x, dev2: 0x%x\n",
-			intr, val1, val2);
-
-	if (!intr)
-		goto out;
-
-	if (intr & INT_ATTACH) {	/* Attached */
-		/* USB */
-		if (val1 & DEV_T1_USB_MASK || val2 & DEV_T2_USB_MASK) {
-			if (pdata->usb_cb)
-				pdata->usb_cb(FSA9480_ATTACHED);
-
-			if (usbsw->mansw) {
-				fsa9480_write_reg(client,
-					FSA9480_REG_MANSW1, usbsw->mansw);
-			}
-		}
-
-		/* UART */
-		if (val1 & DEV_T1_UART_MASK || val2 & DEV_T2_UART_MASK) {
-			if (pdata->uart_cb)
-				pdata->uart_cb(FSA9480_ATTACHED);
-
-			if (!(ctrl & CON_MANUAL_SW)) {
-				fsa9480_write_reg(client,
-					FSA9480_REG_MANSW1, SW_UART);
-			}
-		}
-
-		/* CHARGER */
-		if (val1 & DEV_T1_CHARGER_MASK) {
-			if (pdata->charger_cb)
-				pdata->charger_cb(FSA9480_ATTACHED);
-		}
-
-		/* JIG */
-		if (val2 & DEV_T2_JIG_MASK) {
-			if (pdata->jig_cb)
-				pdata->jig_cb(FSA9480_ATTACHED);
-		}
-	} else if (intr & INT_DETACH) {	/* Detached */
-		/* USB */
-		if (usbsw->dev1 & DEV_T1_USB_MASK ||
-			usbsw->dev2 & DEV_T2_USB_MASK) {
-			if (pdata->usb_cb)
-				pdata->usb_cb(FSA9480_DETACHED);
-		}
-
-		/* UART */
-		if (usbsw->dev1 & DEV_T1_UART_MASK ||
-			usbsw->dev2 & DEV_T2_UART_MASK) {
-			if (pdata->uart_cb)
-				pdata->uart_cb(FSA9480_DETACHED);
-		}
-
-		/* CHARGER */
-		if (usbsw->dev1 & DEV_T1_CHARGER_MASK) {
-			if (pdata->charger_cb)
-				pdata->charger_cb(FSA9480_DETACHED);
-		}
-
-		/* JIG */
-		if (usbsw->dev2 & DEV_T2_JIG_MASK) {
-			if (pdata->jig_cb)
-				pdata->jig_cb(FSA9480_DETACHED);
-		}
-	}
-
-	usbsw->dev1 = val1;
-	usbsw->dev2 = val2;
-
-out:
-	ctrl &= ~CON_INT_MASK;
-	fsa9480_write_reg(client, FSA9480_REG_CTRL, ctrl);
-}
-
-static irqreturn_t fsa9480_irq_handler(int irq, void *data)
-{
-	struct fsa9480_usbsw *usbsw = data;
-	struct i2c_client *client = usbsw->client;
-	int intr;
-
-	/* clear interrupt */
-	fsa9480_read_irq(client, &intr);
-
-	/* device detection */
-	fsa9480_detect_dev(usbsw, intr);
-
-	return IRQ_HANDLED;
-}
-
-static int fsa9480_irq_init(struct fsa9480_usbsw *usbsw)
-{
-	struct fsa9480_platform_data *pdata = usbsw->pdata;
-	struct i2c_client *client = usbsw->client;
-	int ret;
-	int intr;
-	unsigned int ctrl = CON_MASK;
-
-	/* clear interrupt */
-	fsa9480_read_irq(client, &intr);
-
-	/* unmask interrupt (attach/detach only) */
-	fsa9480_write_reg(client, FSA9480_REG_INT1_MASK, 0xfc);
-	fsa9480_write_reg(client, FSA9480_REG_INT2_MASK, 0x1f);
-
-	usbsw->mansw = fsa9480_read_reg(client, FSA9480_REG_MANSW1);
-
-	if (usbsw->mansw)
-		ctrl &= ~CON_MANUAL_SW;	/* Manual Switching Mode */
-
-	fsa9480_write_reg(client, FSA9480_REG_CTRL, ctrl);
-
-	if (pdata && pdata->cfg_gpio)
-		pdata->cfg_gpio();
-
-	if (client->irq) {
-		ret = request_threaded_irq(client->irq, NULL,
-				fsa9480_irq_handler,
-				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
-				"fsa9480 micro USB", usbsw);
-		if (ret) {
-			dev_err(&client->dev, "failed to request IRQ\n");
-			return ret;
-		}
-
-		if (pdata)
-			device_init_wakeup(&client->dev, pdata->wakeup);
-	}
-
-	return 0;
-}
-
-static int fsa9480_probe(struct i2c_client *client,
-			 const struct i2c_device_id *id)
-{
-	struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
-	struct fsa9480_usbsw *usbsw;
-	int ret = 0;
-
-	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
-		return -EIO;
-
-	usbsw = kzalloc(sizeof(struct fsa9480_usbsw), GFP_KERNEL);
-	if (!usbsw) {
-		dev_err(&client->dev, "failed to allocate driver data\n");
-		return -ENOMEM;
-	}
-
-	usbsw->client = client;
-	usbsw->pdata = client->dev.platform_data;
-
-	chip = usbsw;
-
-	i2c_set_clientdata(client, usbsw);
-
-	ret = fsa9480_irq_init(usbsw);
-	if (ret)
-		goto fail1;
-
-	ret = sysfs_create_group(&client->dev.kobj, &fsa9480_group);
-	if (ret) {
-		dev_err(&client->dev,
-				"failed to create fsa9480 attribute group\n");
-		goto fail2;
-	}
-
-	/* ADC Detect Time: 500ms */
-	fsa9480_write_reg(client, FSA9480_REG_TIMING1, 0x6);
-
-	if (chip->pdata->reset_cb)
-		chip->pdata->reset_cb();
-
-	/* device detection */
-	fsa9480_detect_dev(usbsw, INT_ATTACH);
-
-	pm_runtime_set_active(&client->dev);
-
-	return 0;
-
-fail2:
-	if (client->irq)
-		free_irq(client->irq, usbsw);
-fail1:
-	kfree(usbsw);
-	return ret;
-}
-
-static int fsa9480_remove(struct i2c_client *client)
-{
-	struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client);
-
-	if (client->irq)
-		free_irq(client->irq, usbsw);
-
-	sysfs_remove_group(&client->dev.kobj, &fsa9480_group);
-	device_init_wakeup(&client->dev, 0);
-	kfree(usbsw);
-	return 0;
-}
-
-#ifdef CONFIG_PM_SLEEP
-
-static int fsa9480_suspend(struct device *dev)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client);
-	struct fsa9480_platform_data *pdata = usbsw->pdata;
-
-	if (device_may_wakeup(&client->dev) && client->irq)
-		enable_irq_wake(client->irq);
-
-	if (pdata->usb_power)
-		pdata->usb_power(0);
-
-	return 0;
-}
-
-static int fsa9480_resume(struct device *dev)
-{
-	struct i2c_client *client = to_i2c_client(dev);
-	struct fsa9480_usbsw *usbsw = i2c_get_clientdata(client);
-	int dev1, dev2;
-
-	if (device_may_wakeup(&client->dev) && client->irq)
-		disable_irq_wake(client->irq);
-
-	/*
-	 * Clear Pending interrupt. Note that detect_dev does what
-	 * the interrupt handler does. So, we don't miss pending and
-	 * we reenable interrupt if there is one.
-	 */
-	fsa9480_read_reg(client, FSA9480_REG_INT1);
-	fsa9480_read_reg(client, FSA9480_REG_INT2);
-
-	dev1 = fsa9480_read_reg(client, FSA9480_REG_DEV_T1);
-	dev2 = fsa9480_read_reg(client, FSA9480_REG_DEV_T2);
-
-	/* device detection */
-	fsa9480_detect_dev(usbsw, (dev1 || dev2) ? INT_ATTACH : INT_DETACH);
-
-	return 0;
-}
-
-static SIMPLE_DEV_PM_OPS(fsa9480_pm_ops, fsa9480_suspend, fsa9480_resume);
-#define FSA9480_PM_OPS (&fsa9480_pm_ops)
-
-#else
-
-#define FSA9480_PM_OPS NULL
-
-#endif /* CONFIG_PM_SLEEP */
-
-static const struct i2c_device_id fsa9480_id[] = {
-	{"fsa9480", 0},
-	{}
-};
-MODULE_DEVICE_TABLE(i2c, fsa9480_id);
-
-static struct i2c_driver fsa9480_i2c_driver = {
-	.driver = {
-		.name = "fsa9480",
-		.pm = FSA9480_PM_OPS,
-	},
-	.probe = fsa9480_probe,
-	.remove = fsa9480_remove,
-	.id_table = fsa9480_id,
-};
-
-module_i2c_driver(fsa9480_i2c_driver);
-
-MODULE_AUTHOR("Minkyu Kang <mk7.kang@samsung.com>");
-MODULE_DESCRIPTION("FSA9480 USB Switch driver");
-MODULE_LICENSE("GPL");
diff --git a/include/linux/platform_data/fsa9480.h b/include/linux/platform_data/fsa9480.h
deleted file mode 100644
index dea8d84448ec..000000000000
--- a/include/linux/platform_data/fsa9480.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (C) 2010 Samsung Electronics
- * Minkyu Kang <mk7.kang@samsung.com>
- */
-
-#ifndef _FSA9480_H_
-#define _FSA9480_H_
-
-#define FSA9480_ATTACHED	1
-#define FSA9480_DETACHED	0
-
-struct fsa9480_platform_data {
-	void (*cfg_gpio) (void);
-	void (*usb_cb) (u8 attached);
-	void (*uart_cb) (u8 attached);
-	void (*charger_cb) (u8 attached);
-	void (*jig_cb) (u8 attached);
-	void (*reset_cb) (void);
-	void (*usb_power) (u8 on);
-	int wakeup;
-};
-
-#endif /* _FSA9480_H_ */
-- 
2.20.1