Linux-libre 4.3.2-gnu

1 files changed, 102 insertions, 162 deletions

diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
index d8c025b0f..0f65d02ee 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc2005.c
@@ -30,10 +30,11 @@
 #include <linux/delay.h>
 #include <linux/pm.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
 #include <linux/spi/spi.h>
 #include <linux/spi/tsc2005.h>
 #include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+#include <linux/gpio/consumer.h>
 
 /*
  * The touchscreen interface operates as follows:
@@ -61,16 +62,24 @@
 #define TSC2005_CMD_12BIT		0x04
 
 /* control byte 0 */
-#define TSC2005_REG_READ		0x0001
-#define TSC2005_REG_PND0		0x0002
-#define TSC2005_REG_X			0x0000
-#define TSC2005_REG_Y			0x0008
-#define TSC2005_REG_Z1			0x0010
-#define TSC2005_REG_Z2			0x0018
-#define TSC2005_REG_TEMP_HIGH		0x0050
-#define TSC2005_REG_CFR0		0x0060
-#define TSC2005_REG_CFR1		0x0068
-#define TSC2005_REG_CFR2		0x0070
+#define TSC2005_REG_READ		0x01 /* R/W access */
+#define TSC2005_REG_PND0		0x02 /* Power Not Down Control */
+#define TSC2005_REG_X			(0x0 << 3)
+#define TSC2005_REG_Y			(0x1 << 3)
+#define TSC2005_REG_Z1			(0x2 << 3)
+#define TSC2005_REG_Z2			(0x3 << 3)
+#define TSC2005_REG_AUX			(0x4 << 3)
+#define TSC2005_REG_TEMP1		(0x5 << 3)
+#define TSC2005_REG_TEMP2		(0x6 << 3)
+#define TSC2005_REG_STATUS		(0x7 << 3)
+#define TSC2005_REG_AUX_HIGH		(0x8 << 3)
+#define TSC2005_REG_AUX_LOW		(0x9 << 3)
+#define TSC2005_REG_TEMP_HIGH		(0xA << 3)
+#define TSC2005_REG_TEMP_LOW		(0xB << 3)
+#define TSC2005_REG_CFR0		(0xC << 3)
+#define TSC2005_REG_CFR1		(0xD << 3)
+#define TSC2005_REG_CFR2		(0xE << 3)
+#define TSC2005_REG_CONV_FUNC		(0xF << 3)
 
 /* configuration register 0 */
 #define TSC2005_CFR0_PRECHARGE_276US	0x0040
@@ -112,20 +121,37 @@
 #define TSC2005_SPI_MAX_SPEED_HZ	10000000
 #define TSC2005_PENUP_TIME_MS		40
 
-struct tsc2005_spi_rd {
-	struct spi_transfer	spi_xfer;
-	u32			spi_tx;
-	u32			spi_rx;
+static const struct regmap_range tsc2005_writable_ranges[] = {
+	regmap_reg_range(TSC2005_REG_AUX_HIGH, TSC2005_REG_CFR2),
 };
 
+static const struct regmap_access_table tsc2005_writable_table = {
+	.yes_ranges = tsc2005_writable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(tsc2005_writable_ranges),
+};
+
+static struct regmap_config tsc2005_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 16,
+	.reg_stride = 0x08,
+	.max_register = 0x78,
+	.read_flag_mask = TSC2005_REG_READ,
+	.write_flag_mask = TSC2005_REG_PND0,
+	.wr_table = &tsc2005_writable_table,
+	.use_single_rw = true,
+};
+
+struct tsc2005_data {
+	u16 x;
+	u16 y;
+	u16 z1;
+	u16 z2;
+} __packed;
+#define TSC2005_DATA_REGS 4
+
 struct tsc2005 {
 	struct spi_device	*spi;
-
-	struct spi_message      spi_read_msg;
-	struct tsc2005_spi_rd	spi_x;
-	struct tsc2005_spi_rd	spi_y;
-	struct tsc2005_spi_rd	spi_z1;
-	struct tsc2005_spi_rd	spi_z2;
+	struct regmap		*regmap;
 
 	struct input_dev	*idev;
 	char			phys[32];
@@ -154,7 +180,7 @@ struct tsc2005 {
 
 	struct regulator	*vio;
 
-	int			reset_gpio;
+	struct gpio_desc	*reset_gpio;
 	void			(*set_reset)(bool enable);
 };
 
@@ -182,62 +208,6 @@ static int tsc2005_cmd(struct tsc2005 *ts, u8 cmd)
 	return 0;
 }
 
-static int tsc2005_write(struct tsc2005 *ts, u8 reg, u16 value)
-{
-	u32 tx = ((reg | TSC2005_REG_PND0) << 16) | value;
-	struct spi_transfer xfer = {
-		.tx_buf		= &tx,
-		.len		= 4,
-		.bits_per_word	= 24,
-	};
-	struct spi_message msg;
-	int error;
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-
-	error = spi_sync(ts->spi, &msg);
-	if (error) {
-		dev_err(&ts->spi->dev,
-			"%s: failed, register: %x, value: %x, error: %d\n",
-			__func__, reg, value, error);
-		return error;
-	}
-
-	return 0;
-}
-
-static void tsc2005_setup_read(struct tsc2005_spi_rd *rd, u8 reg, bool last)
-{
-	memset(rd, 0, sizeof(*rd));
-
-	rd->spi_tx		   = (reg | TSC2005_REG_READ) << 16;
-	rd->spi_xfer.tx_buf	   = &rd->spi_tx;
-	rd->spi_xfer.rx_buf	   = &rd->spi_rx;
-	rd->spi_xfer.len	   = 4;
-	rd->spi_xfer.bits_per_word = 24;
-	rd->spi_xfer.cs_change	   = !last;
-}
-
-static int tsc2005_read(struct tsc2005 *ts, u8 reg, u16 *value)
-{
-	struct tsc2005_spi_rd spi_rd;
-	struct spi_message msg;
-	int error;
-
-	tsc2005_setup_read(&spi_rd, reg, true);
-
-	spi_message_init(&msg);
-	spi_message_add_tail(&spi_rd.spi_xfer, &msg);
-
-	error = spi_sync(ts->spi, &msg);
-	if (error)
-		return error;
-
-	*value = spi_rd.spi_rx;
-	return 0;
-}
-
 static void tsc2005_update_pen_state(struct tsc2005 *ts,
 				     int x, int y, int pressure)
 {
@@ -266,26 +236,23 @@ static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
 	struct tsc2005 *ts = _ts;
 	unsigned long flags;
 	unsigned int pressure;
-	u32 x, y;
-	u32 z1, z2;
+	struct tsc2005_data tsdata;
 	int error;
 
 	/* read the coordinates */
-	error = spi_sync(ts->spi, &ts->spi_read_msg);
+	error = regmap_bulk_read(ts->regmap, TSC2005_REG_X, &tsdata,
+				 TSC2005_DATA_REGS);
 	if (unlikely(error))
 		goto out;
 
-	x = ts->spi_x.spi_rx;
-	y = ts->spi_y.spi_rx;
-	z1 = ts->spi_z1.spi_rx;
-	z2 = ts->spi_z2.spi_rx;
-
 	/* validate position */
-	if (unlikely(x > MAX_12BIT || y > MAX_12BIT))
+	if (unlikely(tsdata.x > MAX_12BIT || tsdata.y > MAX_12BIT))
 		goto out;
 
 	/* Skip reading if the pressure components are out of range */
-	if (unlikely(z1 == 0 || z2 > MAX_12BIT || z1 >= z2))
+	if (unlikely(tsdata.z1 == 0 || tsdata.z2 > MAX_12BIT))
+		goto out;
+	if (unlikely(tsdata.z1 >= tsdata.z2))
 		goto out;
 
        /*
@@ -293,8 +260,8 @@ static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
 	* the value before pen-up - that implies SPI fed us stale data
 	*/
 	if (!ts->pen_down &&
-	    ts->in_x == x && ts->in_y == y &&
-	    ts->in_z1 == z1 && ts->in_z2 == z2) {
+	    ts->in_x == tsdata.x && ts->in_y == tsdata.y &&
+	    ts->in_z1 == tsdata.z1 && ts->in_z2 == tsdata.z2) {
 		goto out;
 	}
 
@@ -302,20 +269,20 @@ static irqreturn_t tsc2005_irq_thread(int irq, void *_ts)
 	 * At this point we are happy we have a valid and useful reading.
 	 * Remember it for later comparisons. We may now begin downsampling.
 	 */
-	ts->in_x = x;
-	ts->in_y = y;
-	ts->in_z1 = z1;
-	ts->in_z2 = z2;
+	ts->in_x = tsdata.x;
+	ts->in_y = tsdata.y;
+	ts->in_z1 = tsdata.z1;
+	ts->in_z2 = tsdata.z2;
 
 	/* Compute touch pressure resistance using equation #1 */
-	pressure = x * (z2 - z1) / z1;
+	pressure = tsdata.x * (tsdata.z2 - tsdata.z1) / tsdata.z1;
 	pressure = pressure * ts->x_plate_ohm / 4096;
 	if (unlikely(pressure > MAX_12BIT))
 		goto out;
 
 	spin_lock_irqsave(&ts->lock, flags);
 
-	tsc2005_update_pen_state(ts, x, y, pressure);
+	tsc2005_update_pen_state(ts, tsdata.x, tsdata.y, pressure);
 	mod_timer(&ts->penup_timer,
 		  jiffies + msecs_to_jiffies(TSC2005_PENUP_TIME_MS));
 
@@ -338,9 +305,9 @@ static void tsc2005_penup_timer(unsigned long data)
 
 static void tsc2005_start_scan(struct tsc2005 *ts)
 {
-	tsc2005_write(ts, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
-	tsc2005_write(ts, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
-	tsc2005_write(ts, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
+	regmap_write(ts->regmap, TSC2005_REG_CFR0, TSC2005_CFR0_INITVALUE);
+	regmap_write(ts->regmap, TSC2005_REG_CFR1, TSC2005_CFR1_INITVALUE);
+	regmap_write(ts->regmap, TSC2005_REG_CFR2, TSC2005_CFR2_INITVALUE);
 	tsc2005_cmd(ts, TSC2005_CMD_NORMAL);
 }
 
@@ -351,8 +318,8 @@ static void tsc2005_stop_scan(struct tsc2005 *ts)
 
 static void tsc2005_set_reset(struct tsc2005 *ts, bool enable)
 {
-	if (ts->reset_gpio >= 0)
-		gpio_set_value(ts->reset_gpio, enable);
+	if (ts->reset_gpio)
+		gpiod_set_value_cansleep(ts->reset_gpio, enable);
 	else if (ts->set_reset)
 		ts->set_reset(enable);
 }
@@ -388,11 +355,10 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 				     struct device_attribute *attr,
 				     char *buf)
 {
-	struct spi_device *spi = to_spi_device(dev);
-	struct tsc2005 *ts = spi_get_drvdata(spi);
-	u16 temp_high;
-	u16 temp_high_orig;
-	u16 temp_high_test;
+	struct tsc2005 *ts = dev_get_drvdata(dev);
+	unsigned int temp_high;
+	unsigned int temp_high_orig;
+	unsigned int temp_high_test;
 	bool success = true;
 	int error;
 
@@ -403,7 +369,7 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 	 */
 	__tsc2005_disable(ts);
 
-	error = tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
+	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high_orig);
 	if (error) {
 		dev_warn(dev, "selftest failed: read error %d\n", error);
 		success = false;
@@ -412,14 +378,14 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 
 	temp_high_test = (temp_high_orig - 1) & MAX_12BIT;
 
-	error = tsc2005_write(ts, TSC2005_REG_TEMP_HIGH, temp_high_test);
+	error = regmap_write(ts->regmap, TSC2005_REG_TEMP_HIGH, temp_high_test);
 	if (error) {
 		dev_warn(dev, "selftest failed: write error %d\n", error);
 		success = false;
 		goto out;
 	}
 
-	error = tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
+	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
 	if (error) {
 		dev_warn(dev, "selftest failed: read error %d after write\n",
 			 error);
@@ -442,7 +408,7 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
 		goto out;
 
 	/* test that the reset really happened */
-	error = tsc2005_read(ts, TSC2005_REG_TEMP_HIGH, &temp_high);
+	error = regmap_read(ts->regmap, TSC2005_REG_TEMP_HIGH, &temp_high);
 	if (error) {
 		dev_warn(dev, "selftest failed: read error %d after reset\n",
 			 error);
@@ -474,8 +440,7 @@ static umode_t tsc2005_attr_is_visible(struct kobject *kobj,
 				      struct attribute *attr, int n)
 {
 	struct device *dev = container_of(kobj, struct device, kobj);
-	struct spi_device *spi = to_spi_device(dev);
-	struct tsc2005 *ts = spi_get_drvdata(spi);
+	struct tsc2005 *ts = dev_get_drvdata(dev);
 	umode_t mode = attr->mode;
 
 	if (attr == &dev_attr_selftest.attr) {
@@ -495,7 +460,7 @@ static void tsc2005_esd_work(struct work_struct *work)
 {
 	struct tsc2005 *ts = container_of(work, struct tsc2005, esd_work.work);
 	int error;
-	u16 r;
+	unsigned int r;
 
 	if (!mutex_trylock(&ts->mutex)) {
 		/*
@@ -511,7 +476,7 @@ static void tsc2005_esd_work(struct work_struct *work)
 		goto out;
 
 	/* We should be able to read register without disabling interrupts. */
-	error = tsc2005_read(ts, TSC2005_REG_CFR0, &r);
+	error = regmap_read(ts->regmap, TSC2005_REG_CFR0, &r);
 	if (!error &&
 	    !((r ^ TSC2005_CFR0_INITVALUE) & TSC2005_CFR0_RW_MASK)) {
 		goto out;
@@ -575,20 +540,6 @@ static void tsc2005_close(struct input_dev *input)
 	mutex_unlock(&ts->mutex);
 }
 
-static void tsc2005_setup_spi_xfer(struct tsc2005 *ts)
-{
-	tsc2005_setup_read(&ts->spi_x, TSC2005_REG_X, false);
-	tsc2005_setup_read(&ts->spi_y, TSC2005_REG_Y, false);
-	tsc2005_setup_read(&ts->spi_z1, TSC2005_REG_Z1, false);
-	tsc2005_setup_read(&ts->spi_z2, TSC2005_REG_Z2, true);
-
-	spi_message_init(&ts->spi_read_msg);
-	spi_message_add_tail(&ts->spi_x.spi_xfer, &ts->spi_read_msg);
-	spi_message_add_tail(&ts->spi_y.spi_xfer, &ts->spi_read_msg);
-	spi_message_add_tail(&ts->spi_z1.spi_xfer, &ts->spi_read_msg);
-	spi_message_add_tail(&ts->spi_z2.spi_xfer, &ts->spi_read_msg);
-}
-
 static int tsc2005_probe(struct spi_device *spi)
 {
 	const struct tsc2005_platform_data *pdata = dev_get_platdata(&spi->dev);
@@ -653,37 +604,30 @@ static int tsc2005_probe(struct spi_device *spi)
 	ts->spi = spi;
 	ts->idev = input_dev;
 
+	ts->regmap = devm_regmap_init_spi(spi, &tsc2005_regmap_config);
+	if (IS_ERR(ts->regmap))
+		return PTR_ERR(ts->regmap);
+
 	ts->x_plate_ohm = x_plate_ohm;
 	ts->esd_timeout = esd_timeout;
 
-	if (np) {
-		ts->reset_gpio = of_get_named_gpio(np, "reset-gpios", 0);
-		if (ts->reset_gpio == -EPROBE_DEFER)
-			return ts->reset_gpio;
-		if (ts->reset_gpio < 0) {
-			dev_err(&spi->dev, "error acquiring reset gpio: %d\n",
-				ts->reset_gpio);
-			return ts->reset_gpio;
-		}
+	ts->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset",
+						 GPIOD_OUT_HIGH);
+	if (IS_ERR(ts->reset_gpio)) {
+		error = PTR_ERR(ts->reset_gpio);
+		dev_err(&spi->dev, "error acquiring reset gpio: %d\n", error);
+		return error;
+	}
 
-		error = devm_gpio_request_one(&spi->dev, ts->reset_gpio, 0,
-					      "reset-gpios");
-		if (error) {
-			dev_err(&spi->dev, "error requesting reset gpio: %d\n",
-				error);
-			return error;
-		}
+	ts->vio = devm_regulator_get_optional(&spi->dev, "vio");
+	if (IS_ERR(ts->vio)) {
+		error = PTR_ERR(ts->vio);
+		dev_err(&spi->dev, "vio regulator missing (%d)", error);
+		return error;
+	}
 
-		ts->vio = devm_regulator_get(&spi->dev, "vio");
-		if (IS_ERR(ts->vio)) {
-			error = PTR_ERR(ts->vio);
-			dev_err(&spi->dev, "vio regulator missing (%d)", error);
-			return error;
-		}
-	} else {
-		ts->reset_gpio = -1;
+	if (!ts->reset_gpio && pdata)
 		ts->set_reset = pdata->set_reset;
-	}
 
 	mutex_init(&ts->mutex);
 
@@ -692,8 +636,6 @@ static int tsc2005_probe(struct spi_device *spi)
 
 	INIT_DELAYED_WORK(&ts->esd_work, tsc2005_esd_work);
 
-	tsc2005_setup_spi_xfer(ts);
-
 	snprintf(ts->phys, sizeof(ts->phys),
 		 "%s/input-ts", dev_name(&spi->dev));
 
@@ -709,7 +651,7 @@ static int tsc2005_probe(struct spi_device *spi)
 	input_set_abs_params(input_dev, ABS_PRESSURE, 0, max_p, fudge_p, 0);
 
 	if (np)
-		touchscreen_parse_of_params(input_dev, false);
+		touchscreen_parse_properties(input_dev, false);
 
 	input_dev->open = tsc2005_open;
 	input_dev->close = tsc2005_close;
@@ -735,7 +677,7 @@ static int tsc2005_probe(struct spi_device *spi)
 			return error;
 	}
 
-	spi_set_drvdata(spi, ts);
+	dev_set_drvdata(&spi->dev, ts);
 	error = sysfs_create_group(&spi->dev.kobj, &tsc2005_attr_group);
 	if (error) {
 		dev_err(&spi->dev,
@@ -763,7 +705,7 @@ disable_regulator:
 
 static int tsc2005_remove(struct spi_device *spi)
 {
-	struct tsc2005 *ts = spi_get_drvdata(spi);
+	struct tsc2005 *ts = dev_get_drvdata(&spi->dev);
 
 	sysfs_remove_group(&spi->dev.kobj, &tsc2005_attr_group);
 
@@ -775,8 +717,7 @@ static int tsc2005_remove(struct spi_device *spi)
 
 static int __maybe_unused tsc2005_suspend(struct device *dev)
 {
-	struct spi_device *spi = to_spi_device(dev);
-	struct tsc2005 *ts = spi_get_drvdata(spi);
+	struct tsc2005 *ts = dev_get_drvdata(dev);
 
 	mutex_lock(&ts->mutex);
 
@@ -792,8 +733,7 @@ static int __maybe_unused tsc2005_suspend(struct device *dev)
 
 static int __maybe_unused tsc2005_resume(struct device *dev)
 {
-	struct spi_device *spi = to_spi_device(dev);
-	struct tsc2005 *ts = spi_get_drvdata(spi);
+	struct tsc2005 *ts = dev_get_drvdata(dev);
 
 	mutex_lock(&ts->mutex);