Merge branch 'next' into for-linus (88ce3c3c) · Commits · e / devices / android_kernel_teracube_2e

Documentation/devicetree/bindings/input/ads7846.txt

0 → 100644

+91 −0

Original line number	Diff line number	Diff line
		Device tree bindings for TI's ADS7843, ADS7845, ADS7846, ADS7873, TSC2046
		SPI driven touch screen controllers.

		The node for this driver must be a child node of a SPI controller, hence
		all mandatory properties described in

		Documentation/devicetree/bindings/spi/spi-bus.txt

		must be specified.

		Additional required properties:

		compatible Must be one of the following, depending on the
		model:
		"ti,tsc2046"
		"ti,ads7843"
		"ti,ads7845"
		"ti,ads7846"
		"ti,ads7873"

		interrupt-parent
		interrupts An interrupt node describing the IRQ line the chip's
		!PENIRQ pin is connected to.
		vcc-supply A regulator node for the supply voltage.


		Optional properties:

		ti,vref-delay-usecs vref supply delay in usecs, 0 for
		external vref (u16).
		ti,vref-mv The VREF voltage, in millivolts (u16).
		ti,keep-vref-on set to keep vref on for differential
		measurements as well
		ti,swap-xy swap x and y axis
		ti,settle-delay-usec Settling time of the analog signals;
		a function of Vcc and the capacitance
		on the X/Y drivers. If set to non-zero,
		two samples are taken with settle_delay
		us apart, and the second one is used.
		~150 uSec with 0.01uF caps (u16).
		ti,penirq-recheck-delay-usecs If set to non-zero, after samples are
		taken this delay is applied and penirq
		is rechecked, to help avoid false
		events. This value is affected by the
		material used to build the touch layer
		(u16).
		ti,x-plate-ohms Resistance of the X-plate,
		in Ohms (u16).
		ti,y-plate-ohms Resistance of the Y-plate,
		in Ohms (u16).
		ti,x-min Minimum value on the X axis (u16).
		ti,y-min Minimum value on the Y axis (u16).
		ti,x-max Maximum value on the X axis (u16).
		ti,y-max Minimum value on the Y axis (u16).
		ti,pressure-min Minimum reported pressure value
		(threshold) - u16.
		ti,pressure-max Maximum reported pressure value (u16).
		ti,debounce-max Max number of additional readings per
		sample (u16).
		ti,debounce-tol Tolerance used for filtering (u16).
		ti,debounce-rep Additional consecutive good readings
		required after the first two (u16).
		ti,pendown-gpio-debounce Platform specific debounce time for the
		pendown-gpio (u32).
		pendown-gpio GPIO handle describing the pin the !PENIRQ
		line is connected to.
		linux,wakeup use any event on touchscreen as wakeup event.


		Example for a TSC2046 chip connected to an McSPI controller of an OMAP SoC::

		spi_controller {
		tsc2046@0 {
		reg = <0>; /* CS0 */
		compatible = "ti,tsc2046";
		interrupt-parent = <&gpio1>;
		interrupts = <8 0>; /* BOOT6 / GPIO 8 */
		spi-max-frequency = <1000000>;
		pendown-gpio = <&gpio1 8 0>;
		vcc-supply = <&reg_vcc3>;

		ti,x-min = /bits/ 16 <0>;
		ti,x-max = /bits/ 16 <8000>;
		ti,y-min = /bits/ 16 <0>;
		ti,y-max = /bits/ 16 <4800>;
		ti,x-plate-ohms = /bits/ 16 <40>;
		ti,pressure-max = /bits/ 16 <255>;

		linux,wakeup;
		};
		};

drivers/input/keyboard/nspire-keypad.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -122,7 +122,7 @@ static int nspire_keypad_chip_init(struct nspire_keypad *keypad)

		/* Enable interrupts */
		keypad->int_mask = 1 << 1;
		writel(keypad->int_mask, keypad->reg_base + 0xc);
		writel(keypad->int_mask, keypad->reg_base + KEYPAD_INTMSK);

		/* Disable GPIO interrupts to prevent hanging on touchpad */
		/* Possibly used to detect touchpad events */

drivers/input/mouse/elantech.c

+9 −8

Original line number	Diff line number	Diff line
		@@ -694,18 +694,18 @@ static int elantech_packet_check_v3(struct psmouse *psmouse)
		static int elantech_packet_check_v4(struct psmouse *psmouse)
		{
		unsigned char *packet = psmouse->packet;
		unsigned char packet_type = packet[3] & 0x03;

		if ((packet[0] & 0x0c) == 0x04 &&
		(packet[3] & 0x1f) == 0x11)
		switch (packet_type) {
		case 0:
		return PACKET_V4_STATUS;

		case 1:
		return PACKET_V4_HEAD;

		if ((packet[0] & 0x0c) == 0x04 &&
		(packet[3] & 0x1f) == 0x12)
		case 2:
		return PACKET_V4_MOTION;

		if ((packet[0] & 0x0c) == 0x04 &&
		(packet[3] & 0x1f) == 0x10)
		return PACKET_V4_STATUS;
		}

		return PACKET_UNKNOWN;
		}
		@@ -1282,6 +1282,7 @@ static int elantech_set_properties(struct elantech_data *etd)
		etd->hw_version = 3;
		break;
		case 6:
		case 7:
		etd->hw_version = 4;
		break;
		default:

drivers/input/touchscreen/ads7846.c

+108 −15

Original line number	Diff line number	Diff line
		@@ -27,6 +27,9 @@
		#include <linux/interrupt.h>
		#include <linux/slab.h>
		#include <linux/pm.h>
		#include <linux/of.h>
		#include <linux/of_gpio.h>
		#include <linux/of_device.h>
		#include <linux/gpio.h>
		#include <linux/spi/spi.h>
		#include <linux/spi/ads7846.h>
		@@ -961,9 +964,9 @@ static int ads7846_resume(struct device *dev)
		static SIMPLE_DEV_PM_OPS(ads7846_pm, ads7846_suspend, ads7846_resume);

		static int ads7846_setup_pendown(struct spi_device *spi,
		struct ads7846 *ts)
		struct ads7846 *ts,
		const struct ads7846_platform_data *pdata)
		{
		struct ads7846_platform_data *pdata = spi->dev.platform_data;
		int err;

		/*
		@@ -1201,33 +1204,107 @@ static void ads7846_setup_spi_msg(struct ads7846 *ts,
		spi_message_add_tail(x, m);
		}

		#ifdef CONFIG_OF
		static const struct of_device_id ads7846_dt_ids[] = {
		{ .compatible = "ti,tsc2046", .data = (void *) 7846 },
		{ .compatible = "ti,ads7843", .data = (void *) 7843 },
		{ .compatible = "ti,ads7845", .data = (void *) 7845 },
		{ .compatible = "ti,ads7846", .data = (void *) 7846 },
		{ .compatible = "ti,ads7873", .data = (void *) 7873 },
		{ }
		};
		MODULE_DEVICE_TABLE(of, ads7846_dt_ids);

		static const struct ads7846_platform_data ads7846_probe_dt(struct device dev)
		{
		struct ads7846_platform_data *pdata;
		struct device_node *node = dev->of_node;
		const struct of_device_id *match;

		if (!node) {
		dev_err(dev, "Device does not have associated DT data\n");
		return ERR_PTR(-EINVAL);
		}

		match = of_match_device(ads7846_dt_ids, dev);
		if (!match) {
		dev_err(dev, "Unknown device model\n");
		return ERR_PTR(-EINVAL);
		}

		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
		if (!pdata)
		return ERR_PTR(-ENOMEM);

		pdata->model = (unsigned long)match->data;

		of_property_read_u16(node, "ti,vref-delay-usecs",
		&pdata->vref_delay_usecs);
		of_property_read_u16(node, "ti,vref-mv", &pdata->vref_mv);
		pdata->keep_vref_on = of_property_read_bool(node, "ti,keep-vref-on");

		pdata->swap_xy = of_property_read_bool(node, "ti,swap-xy");

		of_property_read_u16(node, "ti,settle-delay-usec",
		&pdata->settle_delay_usecs);
		of_property_read_u16(node, "ti,penirq-recheck-delay-usecs",
		&pdata->penirq_recheck_delay_usecs);

		of_property_read_u16(node, "ti,x-plate-ohms", &pdata->x_plate_ohms);
		of_property_read_u16(node, "ti,y-plate-ohms", &pdata->y_plate_ohms);

		of_property_read_u16(node, "ti,x-min", &pdata->x_min);
		of_property_read_u16(node, "ti,y-min", &pdata->y_min);
		of_property_read_u16(node, "ti,x-max", &pdata->x_max);
		of_property_read_u16(node, "ti,y-max", &pdata->y_max);

		of_property_read_u16(node, "ti,pressure-min", &pdata->pressure_min);
		of_property_read_u16(node, "ti,pressure-max", &pdata->pressure_max);

		of_property_read_u16(node, "ti,debounce-max", &pdata->debounce_max);
		of_property_read_u16(node, "ti,debounce-tol", &pdata->debounce_tol);
		of_property_read_u16(node, "ti,debounce-rep", &pdata->debounce_rep);

		of_property_read_u32(node, "ti,pendown-gpio-debounce",
		&pdata->gpio_pendown_debounce);

		pdata->wakeup = of_property_read_bool(node, "linux,wakeup");

		pdata->gpio_pendown = of_get_named_gpio(dev->of_node, "pendown-gpio", 0);

		return pdata;
		}
		#else
		static const struct ads7846_platform_data ads7846_probe_dt(struct device dev)
		{
		dev_err(dev, "no platform data defined\n");
		return ERR_PTR(-EINVAL);
		}
		#endif

		static int ads7846_probe(struct spi_device *spi)
		{
		const struct ads7846_platform_data *pdata;
		struct ads7846 *ts;
		struct ads7846_packet *packet;
		struct input_dev *input_dev;
		struct ads7846_platform_data *pdata = spi->dev.platform_data;
		unsigned long irq_flags;
		int err;

		if (!spi->irq) {
		dev_dbg(&spi->dev, "no IRQ?\n");
		return -ENODEV;
		}

		if (!pdata) {
		dev_dbg(&spi->dev, "no platform data?\n");
		return -ENODEV;
		return -EINVAL;
		}

		/* don't exceed max specified sample rate */
		if (spi->max_speed_hz > (125000 * SAMPLE_BITS)) {
		dev_dbg(&spi->dev, "f(sample) %d KHz?\n",
		dev_err(&spi->dev, "f(sample) %d KHz?\n",
		(spi->max_speed_hz/SAMPLE_BITS)/1000);
		return -EINVAL;
		}

		/* We'd set TX word size 8 bits and RX word size to 13 bits ... except
		/*
		* We'd set TX word size 8 bits and RX word size to 13 bits ... except
		* that even if the hardware can do that, the SPI controller driver
		* may not. So we stick to very-portable 8 bit words, both RX and TX.
		*/
		@@ -1250,17 +1327,25 @@ static int ads7846_probe(struct spi_device *spi)
		ts->packet = packet;
		ts->spi = spi;
		ts->input = input_dev;
		ts->vref_mv = pdata->vref_mv;
		ts->swap_xy = pdata->swap_xy;

		mutex_init(&ts->lock);
		init_waitqueue_head(&ts->wait);

		pdata = dev_get_platdata(&spi->dev);
		if (!pdata) {
		pdata = ads7846_probe_dt(&spi->dev);
		if (IS_ERR(pdata))
		return PTR_ERR(pdata);
		}

		ts->model = pdata->model ? : 7846;
		ts->vref_delay_usecs = pdata->vref_delay_usecs ? : 100;
		ts->x_plate_ohms = pdata->x_plate_ohms ? : 400;
		ts->pressure_max = pdata->pressure_max ? : ~0;

		ts->vref_mv = pdata->vref_mv;
		ts->swap_xy = pdata->swap_xy;

		if (pdata->filter != NULL) {
		if (pdata->filter_init != NULL) {
		err = pdata->filter_init(pdata, &ts->filter_data);
		@@ -1281,7 +1366,7 @@ static int ads7846_probe(struct spi_device *spi)
		ts->filter = ads7846_no_filter;
		}

		err = ads7846_setup_pendown(spi, ts);
		err = ads7846_setup_pendown(spi, ts, pdata);
		if (err)
		goto err_cleanup_filter;

		@@ -1370,6 +1455,13 @@ static int ads7846_probe(struct spi_device *spi)

		device_init_wakeup(&spi->dev, pdata->wakeup);

		/*
		* If device does not carry platform data we must have allocated it
		* when parsing DT data.
		*/
		if (!dev_get_platdata(&spi->dev))
		devm_kfree(&spi->dev, (void *)pdata);

		return 0;

		err_remove_attr_group:
		@@ -1437,6 +1529,7 @@ static struct spi_driver ads7846_driver = {
		.name = "ads7846",
		.owner = THIS_MODULE,
		.pm = &ads7846_pm,
		.of_match_table = of_match_ptr(ads7846_dt_ids),
		},
		.probe = ads7846_probe,
		.remove = ads7846_remove,