Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input

Pull second round of input updates from Dmitry Torokhov:
 "An update to Elantech driver to support hardware v7, fix to the new
  cyttsp4 driver to use proper addressing, ads7846 device tree support
  and nspire-keypad got a small cleanup."

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: nspire-keypad - replace magic offset with define
  Input: elantech - fix for newer hardware versions (v7)
  Input: cyttsp4 - use 16bit address for I2C/SPI communication
  Input: ads7846 - add device tree bindings
  Input: ads7846 - make sure we do not change platform data

6 files changed, 152 insertions, 47 deletions

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index 84ccf140c1bb..ea195360747e 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -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;
 
 	/*
@@ -1003,7 +1006,7 @@ static int ads7846_setup_pendown(struct spi_device *spi,
  * use formula #2 for pressure, not #3.
  */
 static void ads7846_setup_spi_msg(struct ads7846 *ts,
-				const struct ads7846_platform_data *pdata)
+				  const struct ads7846_platform_data *pdata)
 {
 	struct spi_message *m = &ts->msg[0];
 	struct spi_transfer *x = ts->xfer;
@@ -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,
diff --git a/drivers/input/touchscreen/cyttsp4_core.h b/drivers/input/touchscreen/cyttsp4_core.h
index 86a254354136..8e0d4d490b20 100644
--- a/drivers/input/touchscreen/cyttsp4_core.h
+++ b/drivers/input/touchscreen/cyttsp4_core.h
@@ -369,9 +369,9 @@ struct cyttsp4 {
 
 struct cyttsp4_bus_ops {
 	u16 bustype;
-	int (*write)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length,
+	int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 			const void *values);
-	int (*read)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length,
+	int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 			void *values);
 };
 
@@ -448,13 +448,13 @@ enum cyttsp4_event_id {
 /* y-axis, 0:origin is on top side of panel, 1: bottom */
 #define CY_PCFG_ORIGIN_Y_MASK		0x80
 
-static inline int cyttsp4_adap_read(struct cyttsp4 *ts, u8 addr, int size,
+static inline int cyttsp4_adap_read(struct cyttsp4 *ts, u16 addr, int size,
 		void *buf)
 {
 	return ts->bus_ops->read(ts->dev, ts->xfer_buf, addr, size, buf);
 }
 
-static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u8 addr, int size,
+static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u16 addr, int size,
 		const void *buf)
 {
 	return ts->bus_ops->write(ts->dev, ts->xfer_buf, addr, size, buf);
@@ -463,9 +463,9 @@ static inline int cyttsp4_adap_write(struct cyttsp4 *ts, u8 addr, int size,
 extern struct cyttsp4 *cyttsp4_probe(const struct cyttsp4_bus_ops *ops,
 		struct device *dev, u16 irq, size_t xfer_buf_size);
 extern int cyttsp4_remove(struct cyttsp4 *ts);
-int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u8 addr,
+int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 		u8 length, const void *values);
-int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u8 addr,
+int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 		u8 length, void *values);
 extern const struct dev_pm_ops cyttsp4_pm_ops;
 
diff --git a/drivers/input/touchscreen/cyttsp4_spi.c b/drivers/input/touchscreen/cyttsp4_spi.c
index f8f891bead34..a71e1141d638 100644
--- a/drivers/input/touchscreen/cyttsp4_spi.c
+++ b/drivers/input/touchscreen/cyttsp4_spi.c
@@ -44,7 +44,7 @@
 #define CY_SPI_DATA_BUF_SIZE	(CY_SPI_CMD_BYTES + CY_SPI_DATA_SIZE)
 
 static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
-			   u8 op, u8 reg, u8 *buf, int length)
+			   u8 op, u16 reg, u8 *buf, int length)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct spi_message msg;
@@ -63,14 +63,12 @@ static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
 	memset(wr_buf, 0, CY_SPI_DATA_BUF_SIZE);
 	memset(rd_buf, 0, CY_SPI_CMD_BYTES);
 
-	if (reg > 255)
-		wr_buf[0] = op + CY_SPI_A8_BIT;
-	else
-		wr_buf[0] = op;
-	if (op == CY_SPI_WR_OP)
-		wr_buf[1] = reg % 256;
-	if (op == CY_SPI_WR_OP && length > 0)
-		memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length);
+	wr_buf[0] = op + (((reg >> 8) & 0x1) ? CY_SPI_A8_BIT : 0);
+	if (op == CY_SPI_WR_OP) {
+		wr_buf[1] = reg & 0xFF;
+		if (length > 0)
+			memcpy(wr_buf + CY_SPI_CMD_BYTES, buf, length);
+	}
 
 	memset(xfer, 0, sizeof(xfer));
 	spi_message_init(&msg);
@@ -130,7 +128,7 @@ static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
 }
 
 static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf,
-				      u8 addr, u8 length, void *data)
+				      u16 addr, u8 length, void *data)
 {
 	int rc;
 
@@ -143,7 +141,7 @@ static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf,
 }
 
 static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf,
-				       u8 addr, u8 length, const void *data)
+				       u16 addr, u8 length, const void *data)
 {
 	return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data,
 			length);
diff --git a/drivers/input/touchscreen/cyttsp_core.h b/drivers/input/touchscreen/cyttsp_core.h
index 0cf564a79fb5..07074110a902 100644
--- a/drivers/input/touchscreen/cyttsp_core.h
+++ b/drivers/input/touchscreen/cyttsp_core.h
@@ -112,9 +112,9 @@ struct cyttsp;
 
 struct cyttsp_bus_ops {
 	u16 bustype;
-	int (*write)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length,
+	int (*write)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 			const void *values);
-	int (*read)(struct device *dev, u8 *xfer_buf, u8 addr, u8 length,
+	int (*read)(struct device *dev, u8 *xfer_buf, u16 addr, u8 length,
 			void *values);
 };
 
@@ -145,9 +145,9 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 			    struct device *dev, int irq, size_t xfer_buf_size);
 void cyttsp_remove(struct cyttsp *ts);
 
-int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u8 addr,
+int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 		u8 length, const void *values);
-int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u8 addr,
+int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf, u16 addr,
 		u8 length, void *values);
 extern const struct dev_pm_ops cyttsp_pm_ops;
 
diff --git a/drivers/input/touchscreen/cyttsp_i2c_common.c b/drivers/input/touchscreen/cyttsp_i2c_common.c
index 07c553fbcef2..1d7b6f154168 100644
--- a/drivers/input/touchscreen/cyttsp_i2c_common.c
+++ b/drivers/input/touchscreen/cyttsp_i2c_common.c
@@ -32,18 +32,20 @@
 #include <linux/types.h>
 
 int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
-				      u8 addr, u8 length, void *values)
+				      u16 addr, u8 length, void *values)
 {
 	struct i2c_client *client = to_i2c_client(dev);
+	u8 client_addr = client->addr | ((addr >> 8) & 0x1);
+	u8 addr_lo = addr & 0xFF;
 	struct i2c_msg msgs[] = {
 		{
-			.addr = client->addr,
+			.addr = client_addr,
 			.flags = 0,
 			.len = 1,
-			.buf = &addr,
+			.buf = &addr_lo,
 		},
 		{
-			.addr = client->addr,
+			.addr = client_addr,
 			.flags = I2C_M_RD,
 			.len = length,
 			.buf = values,
@@ -60,17 +62,29 @@ int cyttsp_i2c_read_block_data(struct device *dev, u8 *xfer_buf,
 EXPORT_SYMBOL_GPL(cyttsp_i2c_read_block_data);
 
 int cyttsp_i2c_write_block_data(struct device *dev, u8 *xfer_buf,
-				       u8 addr, u8 length, const void *values)
+				       u16 addr, u8 length, const void *values)
 {
 	struct i2c_client *client = to_i2c_client(dev);
+	u8 client_addr = client->addr | ((addr >> 8) & 0x1);
+	u8 addr_lo = addr & 0xFF;
+	struct i2c_msg msgs[] = {
+		{
+			.addr = client_addr,
+			.flags = 0,
+			.len = length + 1,
+			.buf = xfer_buf,
+		},
+	};
 	int retval;
 
-	xfer_buf[0] = addr;
+	xfer_buf[0] = addr_lo;
 	memcpy(&xfer_buf[1], values, length);
 
-	retval = i2c_master_send(client, xfer_buf, length + 1);
+	retval = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+	if (retval < 0)
+		return retval;
 
-	return retval < 0 ? retval : 0;
+	return retval != ARRAY_SIZE(msgs) ? -EIO : 0;
 }
 EXPORT_SYMBOL_GPL(cyttsp_i2c_write_block_data);
 
diff --git a/drivers/input/touchscreen/cyttsp_spi.c b/drivers/input/touchscreen/cyttsp_spi.c
index 1df625337b84..4728bcb1916c 100644
--- a/drivers/input/touchscreen/cyttsp_spi.c
+++ b/drivers/input/touchscreen/cyttsp_spi.c
@@ -41,7 +41,7 @@
 #define CY_SPI_BITS_PER_WORD	8
 
 static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
-			   u8 op, u8 reg, u8 *buf, int length)
+			   u8 op, u16 reg, u8 *buf, int length)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct spi_message msg;
@@ -126,14 +126,14 @@ static int cyttsp_spi_xfer(struct device *dev, u8 *xfer_buf,
 }
 
 static int cyttsp_spi_read_block_data(struct device *dev, u8 *xfer_buf,
-				      u8 addr, u8 length, void *data)
+				      u16 addr, u8 length, void *data)
 {
 	return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_RD_OP, addr, data,
 			length);
 }
 
 static int cyttsp_spi_write_block_data(struct device *dev, u8 *xfer_buf,
-				       u8 addr, u8 length, const void *data)
+				       u16 addr, u8 length, const void *data)
 {
 	return cyttsp_spi_xfer(dev, xfer_buf, CY_SPI_WR_OP, addr, (void *)data,
 			length);