TSC210x driver using the SPI framework.

This is a rework of the TSC2102 driver from linux-omap-2.6 taking TSC2101
into account with the goal of using only a single driver.
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/hwmon/Kconfig

@@ -684,6 +684,18 @@ config SENSORS_APPLESMC
 	  Say Y here if you have an applicable laptop and want to experience
 	  the awesome power of applesmc.
 
+config SENSORS_TSC210X
+	tristate "TI TSC2101/2102 battery & temperature sensors"
+	depends on HWMON && SPI_MASTER
+	select SPI_TSC210X
+	help
+	  Say Y if your board has a TSC210X chip and you want to
+	  have its battery state, auxiliary input and/or temperature
+	  sensors exported through hwmon.
+
+	  This driver can also be built as a module.  In this case
+	  the module will be called tsc210x_sensors.
+
 config HWMON_DEBUG_CHIP
 	bool "Hardware Monitoring Chip debugging messages"
 	default n

drivers/hwmon/Makefile

@@ -62,6 +62,7 @@ obj-$(CONFIG_SENSORS_VT1211)	+= vt1211.o
 obj-$(CONFIG_SENSORS_VT8231)	+= vt8231.o
 obj-$(CONFIG_SENSORS_W83627EHF)	+= w83627ehf.o
 obj-$(CONFIG_SENSORS_W83L785TS)	+= w83l785ts.o
+obj-$(CONFIG_SENSORS_TSC210X)	+= tsc210x_sensors.o
 
 ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y)
 EXTRA_CFLAGS += -DDEBUG

drivers/hwmon/tsc210x_sensors.c

+/*
+ * drivers/hwmon/tsc210x_sensors.c
+ *
+ * hwmon interface for TSC210X sensors
+ *
+ * Copyright (c) 2005-2007 Andrzej Zaborowski  <balrog@zabor.org>
+ *
+ * This package 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.
+ *
+ * This package 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/autoconf.h>
+#ifdef CONFIG_APM
+# include <linux/apm-emulation.h>
+#endif
+
+#include <linux/spi/tsc210x.h>
+
+struct tsc210x_hwmon {
+	int bat[2], aux[2], temp[2];
+
+	struct class_device *dev;
+	struct tsc210x_config *pdata;
+#ifdef CONFIG_APM
+	spinlock_t apm_lock;
+#endif
+};
+
+#ifdef CONFIG_APM
+# define apm_lock()	spin_lock(&hwmon->apm_lock)
+# define apm_unlock()	spin_unlock(&hwmon->apm_lock)
+#else
+# define apm_lock()
+# define apm_unlock()
+#endif
+
+static void tsc210x_ports(struct tsc210x_hwmon *hwmon, int bat[], int aux[])
+{
+	apm_lock();
+	hwmon->bat[0] = bat[0];
+	hwmon->bat[1] = bat[1];
+	hwmon->aux[0] = aux[0];
+	hwmon->aux[1] = aux[1];
+	apm_unlock();
+}
+
+static void tsc210x_temp1(struct tsc210x_hwmon *hwmon, int temp)
+{
+	apm_lock();
+	hwmon->temp[0] = temp;
+	apm_unlock();
+}
+
+static void tsc210x_temp2(struct tsc210x_hwmon *hwmon, int temp)
+{
+	apm_lock();
+	hwmon->temp[1] = temp;
+	apm_unlock();
+}
+
+#define TSC210X_INPUT(devname, field)	\
+static ssize_t tsc_show_ ## devname(struct device *dev,	\
+		struct device_attribute *devattr, char *buf)	\
+{	\
+	struct tsc210x_hwmon *hwmon = (struct tsc210x_hwmon *)	\
+		platform_get_drvdata(to_platform_device(dev));	\
+	return sprintf(buf, "%i\n", hwmon->field);	\
+}	\
+static DEVICE_ATTR(devname ## _input, S_IRUGO, tsc_show_ ## devname, NULL);
+
+TSC210X_INPUT(in0, bat[0])
+TSC210X_INPUT(in1, bat[1])
+TSC210X_INPUT(in2, aux[0])
+TSC210X_INPUT(in3, aux[1])
+TSC210X_INPUT(in4, temp[0])
+TSC210X_INPUT(in5, temp[1])
+
+static ssize_t tsc_show_temp1(struct device *dev,
+		struct device_attribute *devattr, char *buf)
+{
+	struct tsc210x_hwmon *hwmon = (struct tsc210x_hwmon *)
+		platform_get_drvdata(to_platform_device(dev));
+	int t1, t2;
+	int diff, value;
+
+	t1 = hwmon->temp[0];
+	t2 = hwmon->temp[1];
+
+	/*
+	 * Use method #2 (differential) to calculate current temperature.
+	 * The difference between TEMP2 and TEMP1 input values is
+	 * multiplied by a constant to obtain current temperature.
+	 * To find this constant we use the values measured at 25 C as
+	 * thermometer calibration data.
+	 *
+	 * 298150 is 25 degrees Celcius represented in Kelvins and
+	 * multiplied by 1000 for fixed point precision (273.15 + 25).
+	 * 273150 is zero degrees Celcius.
+	 */
+	diff = hwmon->pdata->temp_at25c[1] - hwmon->pdata->temp_at25c[0];
+	BUG_ON(diff == 0);
+	value = (t2 - t1) * 298150 / diff;	/* This is in Kelvins now */
+
+	value -= 273150;			/* Celcius millidegree */
+	return sprintf(buf, "%i\n", value);
+}
+static DEVICE_ATTR(temp1_input, S_IRUGO, tsc_show_temp1, NULL);
+
+#ifdef CONFIG_APM
+static struct tsc210x_hwmon *apm_hwmon;
+
+static void tsc210x_get_power_status(struct apm_power_info *info)
+{
+	struct tsc210x_hwmon *hwmon = apm_hwmon;
+	apm_lock();
+	hwmon->pdata->apm_report(info, hwmon->bat);
+	apm_unlock();
+}
+#endif
+
+static int tsc210x_hwmon_probe(struct platform_device *pdev)
+{
+	struct tsc210x_hwmon *hwmon;
+	struct tsc210x_config *pdata = pdev->dev.platform_data;
+	int status = 0;
+
+	hwmon = (struct tsc210x_hwmon *)
+		kzalloc(sizeof(struct tsc210x_hwmon), GFP_KERNEL);
+	if (!hwmon) {
+		printk(KERN_ERR "%s: allocation failed\n", __FUNCTION__);
+		return -ENOMEM;
+	}
+
+	hwmon->dev = hwmon_device_register(&pdev->dev);
+	if (IS_ERR(hwmon->dev)) {
+		kfree(hwmon);
+		printk(KERN_ERR "%s: Class registration failed\n",
+				__FUNCTION__);
+		return PTR_ERR(hwmon->dev);
+	}
+
+	hwmon->pdata = pdata;
+
+#ifdef CONFIG_APM
+	spin_lock_init(&hwmon->apm_lock);
+
+	if (pdata->apm_report) {
+		apm_hwmon = hwmon;
+		apm_get_power_status = tsc210x_get_power_status;
+	}
+#endif
+
+	platform_set_drvdata(pdev, hwmon);
+
+	if (pdata->monitor & (TSC_BAT1 | TSC_BAT2 | TSC_AUX1 | TSC_AUX2))
+		status |= tsc210x_ports_cb(pdev->dev.parent,
+				(tsc210x_ports_t) tsc210x_ports, hwmon);
+	if (pdata->monitor & TSC_TEMP) {
+		status |= tsc210x_temp1_cb(pdev->dev.parent,
+				(tsc210x_temp_t) tsc210x_temp1, hwmon);
+		status |= tsc210x_temp2_cb(pdev->dev.parent,
+				(tsc210x_temp_t) tsc210x_temp2, hwmon);
+	}
+
+	if (status) {
+		tsc210x_ports_cb(pdev->dev.parent, 0, 0);
+		tsc210x_temp1_cb(pdev->dev.parent, 0, 0);
+		tsc210x_temp2_cb(pdev->dev.parent, 0, 0);
+		platform_set_drvdata(pdev, 0);
+#ifdef CONFIG_APM
+		if (pdata->apm_report)
+			apm_get_power_status = 0;
+#endif
+		hwmon_device_unregister(hwmon->dev);
+		kfree(hwmon);
+		return status;
+	}
+
+	if (pdata->monitor & TSC_BAT1)
+		status |= device_create_file(&pdev->dev, &dev_attr_in0_input);
+	if (pdata->monitor & TSC_BAT2)
+		status |= device_create_file(&pdev->dev, &dev_attr_in1_input);
+	if (pdata->monitor & TSC_AUX1)
+		status |= device_create_file(&pdev->dev, &dev_attr_in2_input);
+	if (pdata->monitor & TSC_AUX2)
+		status |= device_create_file(&pdev->dev, &dev_attr_in3_input);
+	if (pdata->monitor & TSC_TEMP) {
+		status |= device_create_file(&pdev->dev, &dev_attr_in4_input);
+		status |= device_create_file(&pdev->dev, &dev_attr_in5_input);
+		status |= device_create_file(&pdev->dev, &dev_attr_temp1_input);
+	}
+	if (status)	/* Not fatal */
+		printk(KERN_ERR "%s: Creating one or more "
+				"attribute files failed\n", __FUNCTION__);
+
+	return 0;
+}
+
+static int tsc210x_hwmon_remove(struct platform_device *pdev)
+{
+	struct tsc210x_hwmon *dev = platform_get_drvdata(pdev);
+
+	tsc210x_ports_cb(pdev->dev.parent, 0, 0);
+	tsc210x_temp1_cb(pdev->dev.parent, 0, 0);
+	tsc210x_temp2_cb(pdev->dev.parent, 0, 0);
+	platform_set_drvdata(pdev, 0);
+#ifdef CONFIG_APM
+	if (dev->pdata->apm_report)
+		apm_get_power_status = 0;
+#endif
+	hwmon_device_unregister(dev->dev);
+	kfree(dev);
+	return 0;
+}
+
+static struct platform_driver tsc210x_hwmon_driver = {
+	.probe 		= tsc210x_hwmon_probe,
+	.remove 	= tsc210x_hwmon_remove,
+	/* Nothing to do on suspend/resume */
+	.driver		= {
+		.name	= "tsc210x-hwmon",
+	},
+};
+
+static int __init tsc210x_hwmon_init(void)
+{
+	return platform_driver_register(&tsc210x_hwmon_driver);
+}
+
+static void __exit tsc210x_hwmon_exit(void)
+{
+	platform_driver_unregister(&tsc210x_hwmon_driver);
+}
+
+module_init(tsc210x_hwmon_init);
+module_exit(tsc210x_hwmon_exit);
+
+MODULE_AUTHOR("Andrzej Zaborowski");
+MODULE_DESCRIPTION("hwmon driver for TI TSC210x-connected sensors.");
+MODULE_LICENSE("GPL");

drivers/input/touchscreen/Kconfig

@@ -192,6 +192,20 @@ config TOUCHSCREEN_TSC2102
 	  To compile this driver as a module, choose M here: the
 	  module will be called tsc2102_ts.
 
+config TOUCHSCREEN_TSC210X
+	tristate "TSC 2101/2102 based touchscreens"
+	depends on SPI_MASTER
+	select SPI_TSC210X
+	help
+	  Say Y here if you have a touchscreen interface using a
+	  TI TSC 210x controller, and your board-specific initialisation
+	  code includes that in its table of SPI devices.
+
+	  If unsure, say N (but it's safe to say "Y").
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called tsc210x_ts.
+
 config TOUCHSCREEN_TSC2301
 	tristate "TSC2301 touchscreen support"
 	depends on SPI_TSC2301

drivers/input/touchscreen/Makefile

@@ -20,4 +20,5 @@ obj-$(CONFIG_TOUCHSCREEN_TOUCHWIN)	+= touchwin.o
 obj-$(CONFIG_TOUCHSCREEN_UCB1400)	+= ucb1400_ts.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2102)	+= tsc2102_ts.o
 obj-$(CONFIG_TOUCHSCREEN_OMAP)	+= omap/
+obj-$(CONFIG_TOUCHSCREEN_TSC210X)	+= tsc210x_ts.o
 obj-$(CONFIG_TOUCHSCREEN_TSC2301)	+= tsc2301_ts.o

drivers/input/touchscreen/tsc210x_ts.c

+/*
+ * input/touchscreen/tsc210x_ts.c
+ *
+ * Touchscreen input device driver for the TSC 2101/2102 chips.
+ *
+ * Copyright (c) 2006-2007 Andrzej Zaborowski  <balrog@zabor.org>
+ *
+ * This package 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.
+ *
+ * This package 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+
+#include <linux/spi/tsc210x.h>
+
+static void tsc210x_touch(struct input_dev *dev, int touching)
+{
+	if (!touching) {
+		input_report_abs(dev, ABS_X, 0);
+		input_report_abs(dev, ABS_Y, 0);
+		input_report_abs(dev, ABS_PRESSURE, 0);
+		input_sync(dev);
+	}
+
+	input_report_key(dev, BTN_TOUCH, touching);
+}
+
+static void tsc210x_coords(struct input_dev *dev, int x, int y, int z1, int z2)
+{
+	int p;
+
+	/* Calculate the touch resistance a la equation #1 */
+	if (z1 != 0)
+		p = x * (z2 - z1) / (z1 << 4);
+	else
+		p = 1;
+
+	input_report_abs(dev, ABS_X, x);
+	input_report_abs(dev, ABS_Y, y);
+	input_report_abs(dev, ABS_PRESSURE, p);
+	input_sync(dev);
+}
+
+static int tsc210x_ts_probe(struct platform_device *pdev)
+{
+	int status;
+	struct input_dev *dev;
+
+	dev = input_allocate_device();
+	if (!dev)
+		return -ENOMEM;
+
+	status = tsc210x_touch_cb(pdev->dev.parent,
+			(tsc210x_touch_t) tsc210x_touch, dev);
+	if (status) {
+		input_free_device(dev);
+		return status;
+	}
+
+	status = tsc210x_coords_cb(pdev->dev.parent,
+			(tsc210x_coords_t) tsc210x_coords, dev);
+	if (status) {
+		tsc210x_touch_cb(pdev->dev.parent, 0, 0);
+		input_free_device(dev);
+		return status;
+	}
+
+	dev->name = "TSC210x Touchscreen";
+	dev->cdev.dev = &pdev->dev;
+	dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
+	dev->keybit[LONG(BTN_TOUCH)] |= BIT(BTN_TOUCH);
+	dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
+	dev->phys = "tsc210x/input0";
+	dev->id.bustype = BUS_HOST;
+	dev->id.vendor = 0x0001;
+	dev->id.product = 0x2100;
+	dev->id.version = 0x0001;
+
+	status = input_register_device(dev);
+	if (status) {
+		tsc210x_coords_cb(pdev->dev.parent, 0, 0);
+		tsc210x_touch_cb(pdev->dev.parent, 0, 0);
+		input_free_device(dev);
+		return status;
+	}
+
+	platform_set_drvdata(pdev, dev);
+	printk(KERN_INFO "TSC210x touchscreen initialised\n");
+	return 0;
+}
+
+static int tsc210x_ts_remove(struct platform_device *pdev)
+{
+	struct input_dev *dev = (struct input_dev *)
+		platform_get_drvdata(pdev);
+
+	tsc210x_touch_cb(pdev->dev.parent, 0, 0);
+	tsc210x_coords_cb(pdev->dev.parent, 0, 0);
+	platform_set_drvdata(pdev, 0);
+	input_unregister_device(dev);
+	input_free_device(dev);
+
+	return 0;
+}
+
+static struct platform_driver tsc210x_ts_driver = {
+	.probe 		= tsc210x_ts_probe,
+	.remove 	= tsc210x_ts_remove,
+	/* Nothing to do on suspend/resume */
+	.driver		= {
+		.name	= "tsc210x-ts",
+		.owner	= THIS_MODULE,
+	},
+};
+
+static int __init tsc210x_ts_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&tsc210x_ts_driver);
+	if (ret)
+		return -ENODEV;
+
+	return 0;
+}
+
+static void __exit tsc210x_ts_exit(void)
+{
+	platform_driver_unregister(&tsc210x_ts_driver);
+}
+
+module_init(tsc210x_ts_init);
+module_exit(tsc210x_ts_exit);
+
+MODULE_AUTHOR("Andrzej Zaborowski");
+MODULE_DESCRIPTION("Touchscreen input driver for TI TSC2101/2102.");
+MODULE_LICENSE("GPL");

drivers/spi/Kconfig

@@ -227,6 +227,18 @@ config SPI_TSC2102
          Say Y here if you want support for the TSC2102 chip.  It
 	 will be needed for the touchscreen driver on some boards.
 
+config SPI_TSC210X
+	depends on SPI_MASTER && EXPERIMENTAL
+	tristate "TSC2101/TSC2102 chips support"
+	help
+	  Say Y here if you want support for the TSC210x chips.  It
+	  will be needed for the touchscreen driver on some boards.
+
+	  Note that the device has to be present in the board's SPI
+	  devices table for this driver to load.  This driver doesn't
+	  automatically enable touchscreen, sensors or audio
+	  functionality - enable these in their respective menus.
+
 config SPI_TSC2301
 	tristate "TSC2301 driver"
 	depends on SPI_MASTER

drivers/spi/Makefile

@@ -35,6 +35,7 @@ obj-$(CONFIG_SPI_SPIDEV)	+= spidev.o
 obj-$(CONFIG_SPI_TLE62X0)	+= tle62x0.o
 obj-$(CONFIG_SPI_TSC2101)	+= tsc2101.o
 obj-$(CONFIG_SPI_TSC2102)	+= tsc2102.o
+obj-$(CONFIG_SPI_TSC210X)	+= tsc210x.o
 obj-$(CONFIG_SPI_TSC2301)	+= tsc2301.o
 tsc2301-objs			:= tsc2301-core.o
 tsc2301-$(CONFIG_SPI_TSC2301_AUDIO)	+= tsc2301-mixer.o

drivers/spi/tsc210x.c

+/*
+ * drivers/spi/tsc210x.c
+ *
+ * TSC2101/2102 interface driver.
+ *
+ * Copyright (c) 2005-2007 Andrzej Zaborowski  <balrog@zabor.org>
+ *
+ * This package 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.
+ *
+ * This package 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include <linux/interrupt.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include <linux/autoconf.h>
+#include <linux/spi/spi.h>
+#include <linux/spi/tsc210x.h>
+
+/* Bit field definitions for chip registers */
+
+/* Scan X, Y, Z1, Z2, chip controlled, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_TS_CONTROL		0x8bf4
+/* Scan BAT1, BAT2, AUX1, AUX2, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_SCAN_CONTROL	0x2ff4
+/* Scan TEMP1, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_T1_CONTROL		0x2bf4
+/* Scan TEMP2, 12-bit, 16 samples, 500 usec */
+#define TSC210X_ADC_T2_CONTROL		0x33f4
+/* PINT/DAV acts as DAV */
+#define TSC210X_ADC_DAV			0x4000
+/* Internal reference, 100 usec delay, 1.25 V reference */
+#define TSC210X_ADC_INT_REF		0x0016
+/* External reference, 100 usec delay, 1.25 V reference */
+#define TSC210X_ADC_EXT_REF		0x0002
+/* 84 usec precharge time, 32 usec sense time */
+#define TSC210X_CONFIG_TIMES		0x0008
+/* The reset sequence */
+#define TSC210X_RESET			0xbb00
+/* Pen Status bit */
+#define TSC210X_ADC_PSTCM		(1 << 15)
+/* A/D Status bit */
+#define TSC210X_ADC_ADST		(1 << 14)
+/* (At least) One of X, Y, Z1, Z2 contains data */
+#define TSC210X_TS_DAV			0x0780
+/* (At least) One of BAT1, BAT2, AUX1, AUX2 contains data */
+#define TSC210X_PS_DAV			0x0078
+/* TEMP1 contains data */
+#define TSC210X_T1_DAV			0x0004
+/* TEMP2 contains data */
+#define TSC210X_T2_DAV			0x0002
+#define TSC2101_DAC_ON			0x0000
+#define TSC2101_DAC_OFF			0xe7fc
+#define TSC2102_DAC_ON			0x3ba0
+#define TSC2102_DAC_OFF			0xafa0
+#define TSC210X_FS44K			(1 << 13)
+#define TSC210X_PLL1_OFF		0x0000
+#define TSC210X_PLL1_44K		0x811c
+#define TSC210X_PLL1_48K		0x8120
+#define TSC210X_PLL2_44K		(5462 << 2)
+#define TSC210X_PLL2_48K		(1920 << 2)
+#define TSC210X_SLVMS			(1 << 11)
+#define TSC210X_DEEMPF			(1 << 0)
+#define TSC2102_BASSBC			(1 << 1)
+#define TSC210X_KEYCLICK_OFF		0x0000
+
+#define CS_CHANGE(val)			0
+
+struct tsc210x_spi_req {
+	struct spi_device *dev;
+	uint16_t command, data;
+	struct spi_message message;
+};
+
+struct tsc210x_dev {
+	enum tsc_type {
+		tsc2101,
+		tsc2102,
+	} kind;
+	struct tsc210x_config *pdata;
+	struct clk *bclk_ck;
+
+	struct workqueue_struct *queue;
+	struct delayed_work ts_worker;		/* Poll-wait for PEN UP */
+	struct delayed_work sensor_worker;	/* Scan the ADC inputs */
+	spinlock_t queue_lock;
+	struct completion data_avail;
+	tsc210x_touch_t touch_cb;
+	void *touch_cb_ctx;
+	tsc210x_coords_t coords_cb;
+	void *coords_cb_ctx;
+	tsc210x_ports_t ports_cb;
+	void *ports_cb_ctx;
+	tsc210x_temp_t temp1_cb;
+	void *temp2_cb_ctx;
+	tsc210x_temp_t temp2_cb;
+	void *temp1_cb_ctx;
+
+	struct spi_device *spi;
+	struct spi_transfer *transfers;
+	struct tsc210x_spi_req req_adc;
+	struct tsc210x_spi_req req_status;
+	struct tsc210x_spi_req req_mode;
+	struct tsc210x_spi_req req_stop;
+
+	int pendown;
+	int flushing;			/* Queue flush in progress */
+	uint16_t status, adc_data[4];
+	int bat[2], aux[2], temp[2];
+};
+
+static struct {
+	unsigned int ts_msecs;		/* Interval for .ts_timer */
+	unsigned int mode_msecs;	/* Interval for .mode_timer */
+} settings;
+
+module_param_named(touch_check_msecs, settings.ts_msecs, uint, 0);
+MODULE_PARM_DESC(touch_check_msecs, "Pen-up polling interval in msecs");
+
+module_param_named(sensor_scan_msecs, settings.mode_msecs, uint, 0);
+MODULE_PARM_DESC(sensor_scan_msecs, "Temperature & battery scan interval");
+
+void tsc210x_write_sync(struct tsc210x_dev *dev,
+		int page, u8 address, u16 data)
+{
+	static struct tsc210x_spi_req req;
+	static struct spi_transfer transfer[2];
+	int ret;
+
+	spi_message_init(&req.message);
+
+	/* Address */
+	req.command = (page << 11) | (address << 5);
+	transfer[0].tx_buf = &req.command;
+	transfer[0].rx_buf = 0;
+	transfer[0].len = 2;
+	spi_message_add_tail(&transfer[0], &req.message);
+
+	/* Data */
+	transfer[1].tx_buf = &data;
+	transfer[1].rx_buf = 0;
+	transfer[1].len = 2;
+	transfer[1].cs_change = CS_CHANGE(1);
+	spi_message_add_tail(&transfer[1], &req.message);
+
+	ret = spi_sync(dev->spi, &req.message);
+	if (!ret && req.message.status)
+		ret = req.message.status;
+
+	if (ret)
+		printk(KERN_ERR "%s: error %i in SPI request\n",
+				__FUNCTION__, ret);
+}
+
+void tsc210x_reads_sync(struct tsc210x_dev *dev,
+		int page, u8 startaddress, u16 *data, int numregs)
+{
+	static struct tsc210x_spi_req req;
+	static struct spi_transfer transfer[6];
+	int ret, i, j;
+
+	BUG_ON(numregs + 1 > ARRAY_SIZE(transfer));
+
+	spi_message_init(&req.message);
+	i = 0;
+	j = 0;
+
+	/* Address */
+	req.command = 0x8000 | (page << 11) | (startaddress << 5);
+	transfer[i].tx_buf = &req.command;
+	transfer[i].rx_buf = 0;
+	transfer[i].len = 2;
+	spi_message_add_tail(&transfer[i ++], &req.message);
+
+	/* Data */
+	while (j < numregs) {
+		transfer[i].tx_buf = 0;
+		transfer[i].rx_buf = &data[j ++];
+		transfer[i].len = 2;
+		transfer[i].cs_change = CS_CHANGE(j == numregs);
+		spi_message_add_tail(&transfer[i ++], &req.message);
+	}
+
+	ret = spi_sync(dev->spi, &req.message);
+	if (!ret && req.message.status)
+		ret = req.message.status;
+
+	if (ret)
+		printk(KERN_ERR "%s: error %i in SPI request\n",
+				__FUNCTION__, ret);
+}
+
+uint16_t tsc210x_read_sync(struct tsc210x_dev *dev, int page, uint8_t address)
+{
+	uint16_t ret;
+	tsc210x_reads_sync(dev, page, address, &ret, 1);
+	return ret;
+}
+
+static void tsc210x_submit_async(struct tsc210x_spi_req *spi)
+{
+	int ret;
+
+	ret = spi_async(spi->dev, &spi->message);
+	if (ret)
+		printk(KERN_ERR "%s: error %i in SPI request\n",
+				__FUNCTION__, ret);
+}
+
+static void tsc210x_request_alloc(struct tsc210x_dev *dev,
+		struct tsc210x_spi_req *spi, int direction,
+		int page, u8 startaddress, int numregs, uint16_t *data,
+		void (*complete)(struct tsc210x_dev *context),
+		struct spi_transfer **transfer)
+{
+	spi->dev = dev->spi;
+
+	if (direction == 1)	/* Write */
+		numregs = 2;
+	else			/* Read */
+		numregs += 1;
+
+	spi_message_init(&spi->message);
+	spi->message.complete = (void (*)(void *)) complete;
+	spi->message.context = dev;
+
+	/* Address */
+	spi->command = (page << 11) | (startaddress << 5);
+	if (direction != 1)
+		spi->command |= 1 << 15;
+
+	(*transfer)->tx_buf = &spi->command;
+	(*transfer)->rx_buf = 0;
+	(*transfer)->len = 2;
+	spi_message_add_tail((*transfer) ++, &spi->message);
+
+	/* Data */
+	while (-- numregs) {
+		if (direction == 1)
+			(*transfer)->tx_buf = &spi->data;
+		else
+			(*transfer)->rx_buf = data ++;
+		(*transfer)->len = 2;
+		(*transfer)->cs_change = CS_CHANGE(numregs != 1);
+		spi_message_add_tail((*transfer) ++, &spi->message);
+	}
+}
+
+#define tsc210x_cb_register_func(cb, cb_t)	\
+int tsc210x_ ## cb(struct device *dev, cb_t handler, void *context)	\
+{	\
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)	\
+		platform_get_drvdata(to_platform_device(dev));	\
+	\
+	/* Lock the module */	\
+	if (handler && !tsc->cb)	\
+		if (!try_module_get(THIS_MODULE)) {	\
+			printk(KERN_INFO "Failed to get TSC module\n");	\
+		}	\
+	if (!handler && tsc->cb)	\
+		module_put(THIS_MODULE);	\
+	\
+	tsc->cb = handler;	\
+	tsc->cb ## _ctx = context;	\
+	return 0;	\
+}
+
+tsc210x_cb_register_func(touch_cb, tsc210x_touch_t)
+tsc210x_cb_register_func(coords_cb, tsc210x_coords_t)
+tsc210x_cb_register_func(ports_cb, tsc210x_ports_t)
+tsc210x_cb_register_func(temp1_cb, tsc210x_temp_t)
+tsc210x_cb_register_func(temp2_cb, tsc210x_temp_t)
+
+#ifdef DEBUG
+static void tsc210x_print_dav(void)
+{
+	u16 status = tsc210x_read_sync(dev, TSC210X_TS_STATUS_CTRL);
+	if (status & 0x0fff)
+		printk("TSC210x: data in");
+	if (status & 0x0400)
+		printk(" X");
+	if (status & 0x0200)
+		printk(" Y");
+	if (status & 0x0100)
+		printk(" Z1");
+	if (status & 0x0080)
+		printk(" Z2");
+	if (status & 0x0040)
+		printk(" BAT1");
+	if (status & 0x0020)
+		printk(" BAT2");
+	if (status & 0x0010)
+		printk(" AUX1");
+	if (status & 0x0008)
+		printk(" AUX2");
+	if (status & 0x0004)
+		printk(" TEMP1");
+	if (status & 0x0002)
+		printk(" TEMP2");
+	if (status & 0x0001)
+		printk(" KP");
+	if (status & 0x0fff)
+		printk(".\n");
+}
+#endif
+
+static void tsc210x_complete_dummy(struct tsc210x_dev *dev)
+{
+}
+
+static inline void tsc210x_touchscreen_mode(struct tsc210x_dev *dev)
+{
+	/* Scan X, Y, Z1, Z2, chip controlled, 12-bit, 16 samples, 500 usec */
+	dev->req_mode.data = TSC210X_ADC_TS_CONTROL;
+	tsc210x_submit_async(&dev->req_mode);
+}
+
+static inline void tsc210x_portscan_mode(struct tsc210x_dev *dev)
+{
+	/* Scan BAT1, BAT2, AUX1, AUX2, 12-bit, 16 samples, 500 usec */
+	dev->req_mode.data = TSC210X_ADC_SCAN_CONTROL;
+	tsc210x_submit_async(&dev->req_mode);
+}
+
+static inline void tsc210x_temp1_mode(struct tsc210x_dev *dev)
+{
+	/* Scan TEMP1, 12-bit, 16 samples, 500 usec */
+	dev->req_mode.data = TSC210X_ADC_T1_CONTROL;
+	tsc210x_submit_async(&dev->req_mode);
+}
+
+static inline void tsc210x_temp2_mode(struct tsc210x_dev *dev)
+{
+	/* Scan TEMP2, 12-bit, 16 samples, 500 usec */
+	dev->req_mode.data = TSC210X_ADC_T2_CONTROL;
+	tsc210x_submit_async(&dev->req_mode);
+}
+
+/* Abort current conversion if any */
+static void tsc210x_new_mode(struct tsc210x_dev *dev)
+{
+	dev->req_stop.data = TSC210X_ADC_ADST;
+	tsc210x_submit_async(&dev->req_stop);
+}
+
+static void tsc210x_queue_scan(struct tsc210x_dev *dev)
+{
+	if (dev->pdata->monitor)
+		if (!queue_delayed_work(dev->queue,
+					&dev->sensor_worker,
+					msecs_to_jiffies(settings.mode_msecs)))
+			printk(KERN_ERR "%s: can't queue measurements\n",
+					__FUNCTION__);
+}
+
+static void tsc210x_queue_penup(struct tsc210x_dev *dev)
+{
+	if (!queue_delayed_work(dev->queue,
+				&dev->ts_worker,
+				msecs_to_jiffies(settings.ts_msecs)))
+		printk(KERN_ERR "%s: can't queue pen-up poll\n",
+				__FUNCTION__);
+}
+
+static void tsc210x_status_report(struct tsc210x_dev *dev)
+{
+	/*
+	 * Read all converted data from corresponding registers
+	 * so that the ADC can move on to a new conversion.
+	 */
+	if (dev->status & TSC210X_TS_DAV) {
+		if (!dev->pendown && !dev->flushing) {
+			dev->pendown = 1;
+			if (dev->touch_cb)
+				dev->touch_cb(dev->touch_cb_ctx, 1);
+
+			tsc210x_queue_penup(dev);
+		}
+
+		tsc210x_submit_async(&dev->req_adc);
+	}
+
+	if (dev->status & (TSC210X_PS_DAV | TSC210X_T1_DAV |TSC210X_T2_DAV))
+		complete(&dev->data_avail);
+}
+
+static void tsc210x_data_report(struct tsc210x_dev *dev)
+{
+	uint16_t adc_data[4];
+
+	if (dev->status & TSC210X_PS_DAV) {
+		tsc210x_reads_sync(dev, TSC210X_TS_BAT1, adc_data, 4);
+
+		dev->bat[0] = adc_data[0];
+		dev->bat[1] = adc_data[1];
+		dev->aux[0] = adc_data[2];
+		dev->aux[1] = adc_data[3];
+		if (dev->ports_cb)
+			dev->ports_cb(dev->ports_cb_ctx, dev->bat, dev->aux);
+	}
+
+	if (dev->status & TSC210X_T1_DAV) {
+		dev->temp[0] = tsc210x_read_sync(dev, TSC210X_TS_TEMP1);
+
+		if (dev->temp1_cb)
+			dev->temp1_cb(dev->temp1_cb_ctx, dev->temp[0]);
+	}
+
+	if (dev->status & TSC210X_T2_DAV) {
+		dev->temp[1] = tsc210x_read_sync(dev, TSC210X_TS_TEMP2);
+
+		if (dev->temp2_cb)
+			dev->temp2_cb(dev->temp2_cb_ctx, dev->temp[1]);
+	}
+}
+
+static void tsc210x_coords_report(struct tsc210x_dev *dev)
+{
+	if (dev->coords_cb)
+		dev->coords_cb(dev->coords_cb_ctx,
+				dev->adc_data[0], dev->adc_data[1],
+				dev->adc_data[2], dev->adc_data[3]);
+}
+
+/*
+ * There are at least three ways to check for pen-up:
+ *	- the PINT/DAV pin state,
+ *	- reading PSTCM bit in ADC Control register (D15, offset 0x00),
+ *	- reading ADST bit in ADC Control register (D14, offset 0x00),
+ *		ADC idle would indicate no screen touch.
+ * Unfortunately none of them seems to be 100% accurate and you will
+ * find they are totally inconsistent, i.e. you get to see any arbitrary
+ * combination of values in these three bits.  So we will busy-wait
+ * for a moment when the latter two indicate a pen-up, using a queue,
+ * before we report a pen-up.
+ */
+static void tsc210x_pressure(struct work_struct *work)
+{
+	struct tsc210x_dev *dev =
+		container_of(work, struct tsc210x_dev, ts_worker.work);
+	uint16_t adc_status;
+
+	BUG_ON(!dev->pendown);
+
+	adc_status = tsc210x_read_sync(dev, TSC210X_TS_ADC_CTRL);
+
+	if ((adc_status & TSC210X_ADC_PSTCM) ||
+			!(adc_status & TSC210X_ADC_ADST)) {
+		tsc210x_queue_penup(dev);
+	} else {
+		dev->pendown = 0;
+		if (dev->touch_cb)
+			dev->touch_cb(dev->touch_cb_ctx, 0);
+	}
+}
+
+static void tsc210x_wait_data(struct tsc210x_dev *dev)
+{
+	wait_for_completion(&dev->data_avail);
+
+	tsc210x_data_report(dev);
+}
+
+static void tsc210x_input_scan(struct work_struct *work)
+{
+	struct tsc210x_dev *dev = (struct tsc210x_dev *)
+		container_of(work, struct tsc210x_dev, sensor_worker.work);
+
+	tsc210x_new_mode(dev);
+
+	if (dev->pdata->monitor &
+			(TSC_BAT1 | TSC_BAT2 | TSC_AUX1 | TSC_AUX2)) {
+		tsc210x_portscan_mode(dev);
+		tsc210x_wait_data(dev);
+	}
+
+	if (dev->pdata->monitor & TSC_TEMP) {
+		tsc210x_temp1_mode(dev);
+		tsc210x_wait_data(dev);
+
+		tsc210x_temp2_mode(dev);
+		tsc210x_wait_data(dev);
+	}
+
+	tsc210x_touchscreen_mode(dev);
+
+	spin_lock(&dev->queue_lock);
+	if (!dev->flushing)
+		tsc210x_queue_scan(dev);
+	spin_unlock(&dev->queue_lock);
+}
+
+/* ADC has finished a new conversion for us.  */
+static irqreturn_t tsc210x_handler(int irq, void *dev_id)
+{
+	struct tsc210x_dev *dev = (struct tsc210x_dev *) dev_id;
+
+	/* See what data became available.  */
+	tsc210x_submit_async(&dev->req_status);
+
+	return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_SOUND
+/*
+ * Volume level values should be in the range [0, 127].
+ * Higher values mean lower volume.
+ */
+void tsc210x_set_dac_volume(struct device *dev,
+		uint8_t left_ch, uint8_t right_ch)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	u16 val;
+	if (tsc->kind == tsc2102) {
+		/* All 0's or all 1's */
+		if (left_ch == 0x00 || left_ch == 0x7f)
+			left_ch ^= 0x7f;
+		if (right_ch == 0x00 || right_ch == 0x7f)
+			right_ch ^= 0x7f;
+	}
+
+	val = tsc210x_read_sync(tsc, TSC210X_DAC_GAIN_CTRL);
+
+	val &= 0x8080;	/* Preserve mute-bits */
+	val |= (left_ch << 8) | right_ch;
+
+	tsc210x_write_sync(tsc, TSC210X_DAC_GAIN_CTRL, val);
+}
+
+void tsc210x_set_dac_mute(struct device *dev, int left_ch, int right_ch)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	u16 val;
+
+	val = tsc210x_read_sync(tsc, TSC210X_DAC_GAIN_CTRL);
+
+	val &= 0x7f7f;	/* Preserve volume settings */
+	val |= (left_ch << 15) | (right_ch << 7);
+
+	tsc210x_write_sync(tsc, TSC210X_DAC_GAIN_CTRL, val);
+}
+
+void tsc210x_get_dac_mute(struct device *dev, int *left_ch, int *right_ch)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	u16 val;
+
+	val = tsc210x_read_sync(tsc, TSC210X_DAC_GAIN_CTRL);
+
+	*left_ch = !!(val & (1 << 15));
+	*right_ch = !!(val & (1 << 7));
+}
+
+void tsc210x_set_deemphasis(struct device *dev, int enable)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	u16 val;
+	val = tsc210x_read_sync(tsc, TSC210X_POWER_CTRL);
+
+	if (enable)
+		val &= ~TSC210X_DEEMPF;
+	else
+		val |= TSC210X_DEEMPF;
+
+	tsc210x_write_sync(tsc, TSC210X_POWER_CTRL, val);
+}
+
+void tsc2102_set_bassboost(struct device *dev, int enable)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	u16 val;
+	val = tsc210x_read_sync(tsc, TSC210X_POWER_CTRL);
+
+	if (enable)
+		val &= ~TSC2102_BASSBC;
+	else
+		val |= TSC2102_BASSBC;
+
+	tsc210x_write_sync(tsc, TSC210X_POWER_CTRL, val);
+}
+
+/*	{rate, dsor, fsref}	*/
+static const struct tsc210x_rate_info_s tsc2101_rates[] = {
+	/* Fsref / 6.0 */
+	{7350,	7,	1},
+	{8000,	7,	0},
+	/* Fsref / 5.5 */
+	{8018,	6,	1},
+	{8727,	6,	0},
+	/* Fsref / 5.0 */
+	{8820,	5,	1},
+	{9600,	5,	0},
+	/* Fsref / 4.0 */
+	{11025,	4,	1},
+	{12000,	4,	0},
+	/* Fsref / 3.0 */
+	{14700,	3,	1},
+	{16000,	3,	0},
+	/* Fsref / 2.0 */
+	{22050,	2,	1},
+	{24000,	2,	0},
+	/* Fsref / 1.5 */
+	{29400,	1,	1},
+	{32000,	1,	0},
+	/* Fsref */
+	{44100,	0,	1},
+	{48000,	0,	0},
+
+	{0,	0, 	0},
+};
+
+/*	{rate, dsor, fsref}	*/
+static const struct tsc210x_rate_info_s tsc2102_rates[] = {
+	/* Fsref / 6.0 */
+	{7350,	63,	1},
+	{8000,	63,	0},
+	/* Fsref / 6.0 */
+	{7350,	54,	1},
+	{8000,	54,	0},
+	/* Fsref / 5.0 */
+	{8820,	45,	1},
+	{9600,	45,	0},
+	/* Fsref / 4.0 */
+	{11025,	36,	1},
+	{12000,	36,	0},
+	/* Fsref / 3.0 */
+	{14700,	27,	1},
+	{16000,	27,	0},
+	/* Fsref / 2.0 */
+	{22050,	18,	1},
+	{24000,	18,	0},
+	/* Fsref / 1.5 */
+	{29400,	9,	1},
+	{32000,	9,	0},
+	/* Fsref */
+	{44100,	0,	1},
+	{48000,	0,	0},
+
+	{0,	0, 	0},
+};
+
+int tsc210x_set_rate(struct device *dev, int rate)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	int i;
+	uint16_t val;
+	const struct tsc210x_rate_info_s *rates;
+
+	if (tsc->kind == tsc2101)
+		rates = tsc2101_rates;
+	else
+		rates = tsc2102_rates;
+
+	for (i = 0; rates[i].sample_rate; i ++)
+		if (rates[i].sample_rate == rate)
+			break;
+	if (rates[i].sample_rate == 0) {
+		printk(KERN_ERR "Unknown sampling rate %i.0 Hz\n", rate);
+		return -EINVAL;
+	}
+
+	if (tsc->kind == tsc2101) {
+		val = tsc210x_read_sync(tsc, TSC210X_AUDIO1_CTRL) &
+			~((7 << 3) | (7 << 0));
+		val |= rates[i].divisor << 3;
+		val |= rates[i].divisor << 0;
+	} else
+		val = rates[i].divisor;
+
+	tsc210x_write_sync(tsc, TSC210X_AUDIO1_CTRL, val);
+
+	val = tsc210x_read_sync(tsc, TSC210X_AUDIO3_CTRL);
+
+	if (tsc2102_rates[i].fs_44k) {
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO3_CTRL, val | TSC210X_FS44K);
+		/* Enable Phase-locked-loop, set up clock dividers */
+		tsc210x_write_sync(tsc, TSC210X_PLL1_CTRL, TSC210X_PLL1_44K);
+		tsc210x_write_sync(tsc, TSC210X_PLL2_CTRL, TSC210X_PLL2_44K);
+	} else {
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO3_CTRL, val & ~TSC210X_FS44K);
+		/* Enable Phase-locked-loop, set up clock dividers */
+		tsc210x_write_sync(tsc, TSC210X_PLL1_CTRL, TSC210X_PLL1_48K);
+		tsc210x_write_sync(tsc, TSC210X_PLL2_CTRL, TSC210X_PLL2_48K);
+	}
+
+	return 0;
+}
+
+/*
+ * Perform basic set-up with default values and power the DAC/ADC on.
+ */
+void tsc210x_dac_power(struct device *dev, int on)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+
+	if (on) {
+		/* 16-bit words, DSP mode, sample at Fsref */
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO1_CTRL, 0x0100);
+		/* Keyclicks off, soft-stepping at normal rate */
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO2_CTRL, TSC210X_KEYCLICK_OFF);
+		/* 44.1 kHz Fsref, continuous transfer mode, master DAC */
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO3_CTRL, 0x2000);
+		/* Soft-stepping enabled, 1 dB MIX AGC hysteresis */
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO4_CTRL, 0x0000);
+
+		/* PLL generates 44.1 kHz */
+		tsc210x_write_sync(tsc,
+				TSC210X_PLL1_CTRL, TSC210X_PLL1_44K);
+		tsc210x_write_sync(tsc,
+				TSC210X_PLL2_CTRL, TSC210X_PLL2_44K);
+
+		/* Codec & DAC power up, virtual ground disabled */
+		tsc210x_write_sync(tsc,
+				TSC210X_POWER_CTRL, (tsc->kind == tsc2101) ?
+				TSC2101_DAC_ON : TSC2102_DAC_ON);
+	} else {
+		/* All off */
+		tsc210x_write_sync(tsc,
+				TSC210X_AUDIO2_CTRL, TSC210X_KEYCLICK_OFF);
+		tsc210x_write_sync(tsc,
+				TSC210X_PLL1_CTRL, TSC210X_PLL1_OFF);
+#if 0
+		tsc210x_write_sync(tsc,
+				TSC210X_POWER_CTRL, (tsc->kind == tsc2101) ?
+				TSC2102_DAC_OFF : TSC2102_DAC_OFF);
+#endif
+	}
+}
+
+void tsc210x_set_i2s_master(struct device *dev, int state)
+{
+	struct tsc210x_dev *tsc = (struct tsc210x_dev *)
+		platform_get_drvdata(to_platform_device(dev));
+	uint16_t val;
+
+	val = tsc210x_read_sync(tsc, TSC210X_AUDIO3_CTRL);
+
+	if (state)
+		tsc210x_write_sync(tsc, TSC210X_AUDIO3_CTRL,
+				val | TSC210X_SLVMS);
+	else
+		tsc210x_write_sync(tsc, TSC210X_AUDIO3_CTRL,
+				val & ~TSC210X_SLVMS);
+}
+#endif	/* CONFIG_SOUND */
+
+static int tsc210x_configure(struct tsc210x_dev *dev)
+{
+	/* Reset the chip */
+	tsc210x_write_sync(dev, TSC210X_TS_RESET_CTRL, TSC210X_RESET);
+
+	/* Reference mode */
+	if (dev->pdata->use_internal)
+		tsc210x_write_sync(dev,
+				TSC210X_TS_REF_CTRL, TSC210X_ADC_INT_REF);
+	else
+		tsc210x_write_sync(dev,
+				TSC210X_TS_REF_CTRL, TSC210X_ADC_EXT_REF);
+
+	/* Precharge and sense delays, pen touch detection on */
+	tsc210x_write_sync(dev, TSC210X_TS_CONFIG_CTRL, TSC210X_CONFIG_TIMES);
+
+	/* PINT/DAV acts as DAV */
+	tsc210x_write_sync(dev, TSC210X_TS_STATUS_CTRL, TSC210X_ADC_DAV);
+
+	tsc210x_queue_scan(dev);
+	return 0;
+}
+
+/*
+ * Retrieves chip revision.  Should be always 1.
+ */
+int tsc210x_get_revision(struct tsc210x_dev *dev)
+{
+	return tsc210x_read_sync(dev, TSC210X_AUDIO3_CTRL) & 7;
+}
+
+void tsc210x_keyclick(struct tsc210x_dev *dev,
+		int amplitude, int freq, int length)
+{
+	u16 val;
+	val = tsc210x_read_sync(dev, TSC210X_AUDIO2_CTRL);
+	val &= 0x800f;
+
+	/* Set amplitude */
+	switch (amplitude) {
+	case 1:
+		val |= 4 << 12;
+		break;
+	case 2:
+		val |= 7 << 12;
+		break;
+	default:
+		break;
+	}
+
+	/* Frequency */
+	val |= (freq & 0x7) << 8;
+
+	/* Round to nearest supported length */
+	if (dev->kind == tsc2101)
+		val = (min(length - 1, 31) >> 1) << 4;
+	else {
+		if (length > 20)
+			val |= 4 << 4;
+		else if (length > 6)
+			val |= 3 << 4;
+		else if (length > 4)
+			val |= 2 << 4;
+		else if (length > 2)
+			val |= 1 << 4;
+	}
+
+	/* Enable keyclick */
+	val |= 0x8000;
+
+	tsc210x_write_sync(dev, TSC210X_AUDIO2_CTRL, val);
+}
+
+#ifdef CONFIG_PM
+/*
+ * Suspend the chip.
+ */
+static int
+tsc210x_suspend(struct spi_device *spi, pm_message_t state)
+{
+	struct tsc210x_dev *dev = dev_get_drvdata(&spi->dev);
+
+	if (!dev)
+		return -ENODEV;
+
+	/* Stop the inputs scan loop */
+	spin_lock(&dev->queue_lock);
+	dev->flushing = 1;
+	cancel_delayed_work(&dev->sensor_worker);
+	spin_unlock(&dev->queue_lock);
+	flush_workqueue(dev->queue);
+
+	/* Wait until pen-up happens */
+	while (dev->pendown)
+		flush_workqueue(dev->queue);
+
+	/* Abort current conversion and power down the ADC */
+	tsc210x_write_sync(dev, TSC210X_TS_ADC_CTRL, TSC210X_ADC_ADST);
+
+	dev->spi->dev.power.power_state = state;
+
+	return 0;
+}
+
+/*
+ * Resume chip operation.
+ */
+static int tsc210x_resume(struct spi_device *spi)
+{
+	struct tsc210x_dev *dev = dev_get_drvdata(&spi->dev);
+	int err;
+
+	if (!dev)
+		return 0;
+
+	dev->spi->dev.power.power_state = PMSG_ON;
+
+	spin_lock(&dev->queue_lock);
+	err = tsc210x_configure(dev);
+
+	dev->flushing = 0;
+	spin_unlock(&dev->queue_lock);
+
+	return err;
+}
+#else
+#define tsc210x_suspend	NULL
+#define tsc210x_resume	NULL
+#endif
+
+static struct platform_device tsc210x_ts_device = {
+	.name 		= "tsc210x-ts",
+	.id 		= -1,
+};
+
+static struct platform_device tsc210x_hwmon_device = {
+	.name 		= "tsc210x-hwmon",
+	.id 		= -1,
+};
+
+static struct platform_device tsc210x_alsa_device = {
+	.name 		= "tsc210x-alsa",
+	.id 		= -1,
+};
+
+static int tsc210x_probe(struct spi_device *spi, enum tsc_type type)
+{
+	struct tsc210x_config *pdata = spi->dev.platform_data;
+	struct spi_transfer *spi_buffer;
+	struct tsc210x_dev *dev;
+	int err = 0;
+
+	if (!pdata) {
+		printk(KERN_ERR "TSC210x: Platform data not supplied\n");
+		return -ENOENT;
+	}
+
+	if (!spi->irq) {
+		printk(KERN_ERR "TSC210x: Invalid irq value\n");
+		return -EINVAL;
+	}
+
+	dev = (struct tsc210x_dev *)
+		kzalloc(sizeof(struct tsc210x_dev), GFP_KERNEL);
+	if (!dev) {
+		printk(KERN_ERR "TSC210x: No memory\n");
+		return -ENOMEM;
+	}
+
+	dev->pdata = pdata;
+	dev->pendown = 0;
+	dev->spi = spi;
+	dev->kind = type;
+	dev->queue = create_singlethread_workqueue(spi->dev.driver->name);
+	if (!dev->queue) {
+		printk(KERN_ERR "TSC210x: Can't make a workqueue\n");
+		err = -ENOMEM;
+		goto err_queue;
+	}
+
+	spin_lock_init(&dev->queue_lock);
+	init_completion(&dev->data_avail);
+
+	/* Allocate enough struct spi_transfer's for all requests */
+	spi_buffer = kzalloc(sizeof(struct spi_transfer) * 16, GFP_KERNEL);
+	if (!spi_buffer) {
+		printk(KERN_ERR "TSC210x: No memory for SPI buffers\n");
+		err = -ENOMEM;
+		goto err_buffers;
+	}
+
+	dev->transfers = spi_buffer;
+	tsc210x_request_alloc(dev, &dev->req_adc, 0,
+			TSC210X_TS_X, 4, dev->adc_data,
+			tsc210x_coords_report, &spi_buffer);
+	tsc210x_request_alloc(dev, &dev->req_status, 0,
+			TSC210X_TS_STATUS_CTRL, 1, &dev->status,
+			tsc210x_status_report, &spi_buffer);
+	tsc210x_request_alloc(dev, &dev->req_mode, 1,
+			TSC210X_TS_ADC_CTRL, 1, 0,
+			tsc210x_complete_dummy, &spi_buffer);
+	tsc210x_request_alloc(dev, &dev->req_stop, 1,
+			TSC210X_TS_ADC_CTRL, 1, 0,
+			tsc210x_complete_dummy, &spi_buffer);
+
+	if (pdata->bclk) {
+		/* Get the BCLK */
+		dev->bclk_ck = clk_get(&spi->dev, pdata->bclk);
+		if (IS_ERR(dev->bclk_ck)) {
+			err = PTR_ERR(dev->bclk_ck);
+			printk(KERN_ERR "Unable to get '%s': %i\n",
+					pdata->bclk, err);
+			goto err_clk;
+		}
+
+		clk_enable(dev->bclk_ck);
+	}
+
+	INIT_DELAYED_WORK(&dev->ts_worker, tsc210x_pressure);
+	INIT_DELAYED_WORK(&dev->sensor_worker, tsc210x_input_scan);
+
+	/* Setup the communication bus */
+	dev_set_drvdata(&spi->dev, dev);
+	spi->dev.power.power_state = PMSG_ON;
+	spi->mode = SPI_MODE_1;
+	spi->bits_per_word = 16;
+	err = spi_setup(spi);
+	if (err)
+		goto err_spi;
+
+	/* Now try to detect the chip, make first contact */
+	if (tsc210x_get_revision(dev) != 0x1) {
+		printk(KERN_ERR "No TI %s chip found!\n",
+				spi->dev.driver->name);
+		err = -ENODEV;
+		goto err_spi;
+	}
+
+	err = tsc210x_configure(dev);
+	if (err)
+		goto err_spi;
+
+	/* We want no interrupts before configuration succeeds.  */
+	spin_lock(&dev->queue_lock);
+	dev->flushing = 1;
+
+	if (request_irq(spi->irq, tsc210x_handler, IRQF_SAMPLE_RANDOM |
+				IRQF_TRIGGER_FALLING, spi->dev.driver->name,
+				dev)) {
+		printk(KERN_ERR "Could not allocate touchscreen IRQ!\n");
+		err = -EINVAL;
+		goto err_irq;
+	}
+
+	/* Register subdevices controlled by the TSC 2101/2102 */
+	tsc210x_ts_device.dev.platform_data = dev;
+	tsc210x_ts_device.dev.parent = &spi->dev;
+	err = platform_device_register(&tsc210x_ts_device);
+	if (err)
+		goto err_irq;
+
+	tsc210x_hwmon_device.dev.platform_data = pdata;
+	tsc210x_hwmon_device.dev.parent = &spi->dev;
+	err = platform_device_register(&tsc210x_hwmon_device);
+	if (err)
+		goto err_hwmon;
+
+	tsc210x_alsa_device.dev.platform_data = pdata->alsa_config;
+	tsc210x_alsa_device.dev.parent = &spi->dev;
+	err = platform_device_register(&tsc210x_alsa_device);
+	if (err)
+		goto err_alsa;
+
+	dev->flushing = 0;
+	spin_unlock(&dev->queue_lock);
+	return 0;
+
+err_alsa:
+	platform_device_unregister(&tsc210x_hwmon_device);
+err_hwmon:
+	platform_device_unregister(&tsc210x_ts_device);
+err_irq:
+	spin_unlock(&dev->queue_lock);
+err_spi:
+	dev_set_drvdata(&spi->dev, NULL);
+	clk_disable(dev->bclk_ck);
+	clk_put(dev->bclk_ck);
+err_clk:
+	kfree(dev->transfers);
+err_buffers:
+	destroy_workqueue(dev->queue);
+err_queue:
+	kfree(dev);
+	return err;
+}
+
+static int tsc2101_probe(struct spi_device *spi)
+{
+	return tsc210x_probe(spi, tsc2101);
+}
+
+static int tsc2102_probe(struct spi_device *spi)
+{
+	return tsc210x_probe(spi, tsc2102);
+}
+
+static int tsc210x_remove(struct spi_device *spi)
+{
+	struct tsc210x_dev *dev = dev_get_drvdata(&spi->dev);
+
+	/* Stop the inputs scan loop */
+	spin_lock(&dev->queue_lock);
+	dev->flushing = 1;
+	cancel_delayed_work(&dev->sensor_worker);
+	spin_unlock(&dev->queue_lock);
+	flush_workqueue(dev->queue);
+
+	/* Wait for pen-up */
+	while (dev->pendown)
+		flush_workqueue(dev->queue);
+
+	/* Abort current conversion and power down the ADC */
+	tsc210x_write_sync(dev, TSC210X_TS_ADC_CTRL, TSC210X_ADC_ADST);
+
+	destroy_workqueue(dev->queue);
+
+	platform_device_unregister(&tsc210x_ts_device);
+	platform_device_unregister(&tsc210x_hwmon_device);
+	platform_device_unregister(&tsc210x_alsa_device);
+
+	dev_set_drvdata(&spi->dev, NULL);
+
+	/* Release the BCLK */
+	clk_disable(dev->bclk_ck);
+	clk_put(dev->bclk_ck);
+
+	kfree(dev->transfers);
+	kfree(dev);
+
+	return 0;
+}
+
+static struct spi_driver tsc2101_driver = {
+	.probe		= tsc2101_probe,
+	.remove		= tsc210x_remove,
+	.suspend	= tsc210x_suspend,
+	.resume		= tsc210x_resume,
+	.driver		= {
+		.name	= "tsc2101",
+		.owner	= THIS_MODULE,
+		.bus	= &spi_bus_type,
+	},
+};
+
+static struct spi_driver tsc2102_driver = {
+	.probe		= tsc2102_probe,
+	.remove		= tsc210x_remove,
+	.suspend	= tsc210x_suspend,
+	.resume		= tsc210x_resume,
+	.driver		= {
+		.name	= "tsc2102",
+		.owner	= THIS_MODULE,
+		.bus	= &spi_bus_type,
+	},
+};
+
+static char __initdata banner[] = KERN_INFO "TI TSC210x driver initializing\n";
+
+static int __init tsc210x_init(void)
+{
+	int err;
+	printk(banner);
+
+	settings.ts_msecs = 20;
+	settings.mode_msecs = 1000;
+
+	err = spi_register_driver(&tsc2101_driver);
+	if (err != 0)
+		return err;
+
+	err = spi_register_driver(&tsc2102_driver);
+	if (err != 0)
+		spi_unregister_driver(&tsc2101_driver);
+
+	return err;
+}
+
+static void __exit tsc210x_exit(void)
+{
+	spi_unregister_driver(&tsc2101_driver);
+	spi_unregister_driver(&tsc2102_driver);
+}
+
+module_init(tsc210x_init);
+module_exit(tsc210x_exit);
+
+EXPORT_SYMBOL(tsc210x_read_sync);
+EXPORT_SYMBOL(tsc210x_reads_sync);
+EXPORT_SYMBOL(tsc210x_write_sync);
+EXPORT_SYMBOL(tsc210x_keyclick);
+
+MODULE_AUTHOR("Andrzej Zaborowski");
+MODULE_DESCRIPTION("Interface driver for TI TSC210x chips.");
+MODULE_LICENSE("GPL");

include/linux/spi/tsc210x.h

+/*
+ * include/linux/spi/tsc2102.h
+ *
+ * TI TSC2101/2102 control register definitions.
+ *
+ * Copyright (c) 2005-2007 Andrzej Zaborowski  <balrog@zabor.org>
+ *
+ * This package 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.
+ *
+ * This package 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this package; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+#ifndef __LINUX_SPI_TSC210X_H
+#define __LINUX_SPI_TSC210X_H
+
+struct apm_power_info;
+struct tsc210x_config {
+	int use_internal;	/* Use internal reference voltage */
+	uint32_t monitor;	/* What inputs are relevant */
+	int temp_at25c[2];	/* Thermometer calibration data */
+	void (*apm_report)(struct apm_power_info *info, int battery[]);
+				/* Report status to APM based on battery[] */
+	void *alsa_config;	/* .platform_data for the ALSA device */
+	const char *mclk;	/* Optional: bclk name */
+	const char *bclk;	/* Optional: mclk name */
+};
+
+#define TSC_BAT1	(1 << 0)
+#define TSC_BAT2	(1 << 1)
+#define TSC_AUX1	(1 << 2)
+#define TSC_AUX2	(1 << 3)
+#define TSC_TEMP	(1 << 4)
+
+#define TSC_AUX		TSC_AUX1
+#define TSC_VBAT	TSC_BAT1
+
+struct tsc210x_dev;
+extern u16 tsc210x_read_sync(struct tsc210x_dev *dev, int page, u8 address);
+extern void tsc210x_reads_sync(struct tsc210x_dev *dev, int page,
+		u8 startaddress, u16 *data, int numregs);
+extern void tsc210x_write_sync(struct tsc210x_dev *dev, int page,
+		u8 address, u16 data);
+
+typedef void (*tsc210x_touch_t)(void *context, int touching);
+typedef void (*tsc210x_coords_t)(void *context, int x, int y, int z1, int z2);
+typedef void (*tsc210x_ports_t)(void *context, int bat[], int aux[]);
+typedef void (*tsc210x_temp_t)(void *context, int temp);
+extern int tsc210x_touch_cb(struct device *dev,
+		tsc210x_touch_t handler, void *context);
+extern int tsc210x_coords_cb(struct device *dev,
+		tsc210x_coords_t handler, void *context);
+extern int tsc210x_ports_cb(struct device *dev,
+		tsc210x_ports_t handler, void *context);
+extern int tsc210x_temp1_cb(struct device *dev,
+		tsc210x_temp_t handler, void *context);
+extern int tsc210x_temp2_cb(struct device *dev,
+		tsc210x_temp_t handler, void *context);
+
+#ifdef CONFIG_SOUND
+extern void tsc210x_set_dac_volume(struct device *dev,
+		uint8_t left_ch, uint8_t right_ch);
+extern void tsc210x_set_dac_mute(struct device *dev,
+		int left_ch, int right_ch);
+extern void tsc210x_get_dac_mute(struct device *dev,
+		int *left_ch, int *right_ch);
+extern void tsc210x_dac_power(struct device *dev, int on);
+extern int tsc210x_set_rate(struct device *dev, int rate);
+extern void tsc210x_set_i2s_master(struct device *dev, int state);
+extern void tsc210x_set_deemphasis(struct device *dev, int enable);
+extern void tsc2102_set_bassboost(struct device *dev, int enable);
+#endif
+
+/*
+ * Emit a short keyclick typically in order to give feedback to
+ * user on specific events.
+ *
+ * amplitude must be between 0 (lowest) and 2 (highest).
+ * freq must be between 0 (corresponds to 62.5 Hz) and 7 (8 kHz).
+ * length should be between 2 and 32 periods.
+ *
+ * This function sleeps but for a period unrelated to the length of
+ * the sound, i.e. returning doesn't indicate that the sound has
+ * finished.
+ */
+extern void tsc210x_keyclick(struct tsc210x_dev *dev,
+		int amplitude, int freq, int length);
+
+/* Page 0, Touch Screen & Keypad Data registers */
+#define TSC210X_TS_X			0, 0x00
+#define TSC210X_TS_Y			0, 0x01
+#define TSC210X_TS_Z1			0, 0x02
+#define TSC210X_TS_Z2			0, 0x03
+#define TSC210X_TS_BAT1			0, 0x05
+#define TSC2102_TS_BAT2			0, 0x06
+#define TSC210X_TS_AUX1			0, 0x07
+#define TSC2101_TS_AUX2			0, 0x08
+#define TSC210X_TS_TEMP1		0, 0x09
+#define TSC210X_TS_TEMP2		0, 0x0a
+
+/* Page 1, Touch Screen & Keypad Control registers */
+#define TSC210X_TS_ADC_CTRL		1, 0x00
+#define TSC210X_TS_STATUS_CTRL		1, 0x01
+#define TSC2101_TS_BUFFER_CTRL		1, 0x02
+#define TSC210X_TS_REF_CTRL		1, 0x03
+#define TSC210X_TS_RESET_CTRL		1, 0x04
+#define TSC210X_TS_CONFIG_CTRL		1, 0x05
+#define TSC2101_TS_TEMPMAX_CTRL		1, 0x06
+#define TSC2101_TS_TEMPMIN_CTRL		1, 0x07
+#define TSC2101_TS_AUX1MAX_CTRL		1, 0x08
+#define TSC2101_TS_AUX1MIN_CTRL		1, 0x09
+#define TSC2101_TS_AUX2MAX_CTRL		1, 0x0a
+#define TSC2101_TS_AUX2MIN_CTRL		1, 0x0b
+#define TSC2101_TS_MCONFIG_CTRL		1, 0x0c
+#define TSC2101_TS_DELAY_CTRL		1, 0x0d
+
+/* Page 2, Audio Control registers */
+#define TSC210X_AUDIO1_CTRL		2, 0x00
+#define TSC2101_HEADSET_GAIN_CTRL	2, 0x01
+#define TSC210X_DAC_GAIN_CTRL		2, 0x02
+#define TSC2101_MIXER_GAIN_CTRL		2, 0x03
+#define TSC210X_AUDIO2_CTRL		2, 0x04
+#define TSC210X_POWER_CTRL		2, 0x05
+#define TSC210X_AUDIO3_CTRL		2, 0x06
+#define TSC210X_LCH_BASS_BOOST_N0	2, 0x07
+#define TSC210X_LCH_BASS_BOOST_N1	2, 0x08
+#define TSC210X_LCH_BASS_BOOST_N2	2, 0x09
+#define TSC210X_LCH_BASS_BOOST_N3	2, 0x0a
+#define TSC210X_LCH_BASS_BOOST_N4	2, 0x0b
+#define TSC210X_LCH_BASS_BOOST_N5	2, 0x0c
+#define TSC210X_LCH_BASS_BOOST_D1	2, 0x0d
+#define TSC210X_LCH_BASS_BOOST_D2	2, 0x0e
+#define TSC210X_LCH_BASS_BOOST_D4	2, 0x0f
+#define TSC210X_LCH_BASS_BOOST_D5	2, 0x10
+#define TSC210X_RCH_BASS_BOOST_N0	2, 0x11
+#define TSC210X_RCH_BASS_BOOST_N1	2, 0x12
+#define TSC210X_RCH_BASS_BOOST_N2	2, 0x13
+#define TSC210X_RCH_BASS_BOOST_N3	2, 0x14
+#define TSC210X_RCH_BASS_BOOST_N4	2, 0x15
+#define TSC210X_RCH_BASS_BOOST_N5	2, 0x16
+#define TSC210X_RCH_BASS_BOOST_D1	2, 0x17
+#define TSC210X_RCH_BASS_BOOST_D2	2, 0x18
+#define TSC210X_RCH_BASS_BOOST_D4	2, 0x19
+#define TSC210X_RCH_BASS_BOOST_D5	2, 0x1a
+#define TSC210X_PLL1_CTRL		2, 0x1b
+#define TSC210X_PLL2_CTRL		2, 0x1c
+#define TSC210X_AUDIO4_CTRL		2, 0x1d
+#define TSC2101_HANDSET_GAIN_CTRL	2, 0x1e
+#define TSC2101_CELL_GAIN_CTRL		2, 0x1f
+#define TSC2101_AUIDO5_CTRL		2, 0x20
+#define TSC2101_AUDIO6_CTRL		2, 0x21
+#define TSC2101_AUDIO7_CTRL		2, 0x22
+#define TSC2101_GPIO_CTRL		2, 0x23
+#define TSC2101_IN_AGC_CTRL		2, 0x24
+#define TSC2101_POWER_STATUS		2, 0x25
+#define TSC2101_MIX_AGC_CTRL		2, 0x26
+#define TSC2101_CELL_AGC_CTRL		2, 0x27
+
+/* Field masks for Audio Control 1 */
+#define AC1_WLEN(ARG)			(((ARG) & 0x03) << 10)
+#define AC1_DATFM(ARG)			(((ARG) & 0x03) << 8)
+#define AC1_DACFS(ARG)			((ARG) & 0x3f)
+
+/* Field masks for TSC2102_DAC_GAIN_CTRL */
+#define DGC_DALMU			(1 << 15)
+#define DGC_DALVL(ARG)			(((ARG) & 0x7f) << 8)
+#define DGC_DARMU			(1 << 7)
+#define DGC_DARVL(ARG)			(((ARG) & 0x7f))
+
+/* Field formats for TSC210X_AUDIO2_CTRL */
+#define AC2_KCLEN			(1 << 15)
+#define AC2_KCLAC(ARG)			(((ARG) & 0x07) << 12)
+#define AC2_KCLFRQ(ARG)			(((ARG) & 0x07) << 8)
+#define AC2_KCLLN(ARG)			(((ARG) & 0x0f) << 4)
+#define AC2_DLGAF			(1 << 3)
+#define AC2_DRGAF			(1 << 2)
+#define AC2_DASTC			(1 << 1)
+
+/* Field masks for TSC210X_DAC_POWER_CTRL */
+#define CPC_PWDNC			(1 << 15)
+#define CPC_DAODRC			(1 << 12)
+#define CPC_DAPWDN			(1 << 10)
+#define CPC_VGPWDN			(1 << 8)
+#define CPC_DAPWDF			(1 << 6)
+#define CPC_BASSBC			(1 << 1)
+#define CPC_DEEMPF			(0x01)
+
+/* Field masks for TSC210X_AUDIO3_CTRL */
+#define AC3_DMSVOL(ARG)			(((ARG) & 0x03) << 14)
+#define AC3_REFFS			(1 << 13)
+#define AC3_DAXFM			(1 << 12)
+#define AC3_SLVMS			(1 << 11)
+#define AC3_DALOVF			(1 << 7)
+#define AC3_DAROVF			(1 << 6)
+#define AC3_REVID(ARG)			(((ARG) & 0x07))
+
+/* Field masks for TSC210X_PLL1_CTRL */
+#define PLL1_PLLEN			(1 << 15)
+#define PLL1_Q_VAL(ARG)			(((ARG) & 0x0f) << 11)
+#define PLL1_P_VAL(ARG)			(((ARG) & 0x07) << 8)
+#define PLL1_I_VAL(ARG)			(((ARG) & 0x3f) << 2)
+
+/* Field masks for TSC210X_PLL2_CTRL */
+#define PLL2_D_VAL(ARG)			(((ARG) & 0x3fff) << 2)
+
+/* Field masks for TSC210X_AUDIO4_CTRL */
+#define AC4_DASTPD			(1 << 14)
+
+struct tsc210x_rate_info_s {
+	u16 sample_rate;
+	u8 divisor;
+	u8 fs_44k;	/* 44.1 kHz Fsref if 1, 48 kHz if 0 */
+};
+
+#endif	/* __LINUX_SPI_TSC210X_H */