Merge tag 'iio-for-4.15c' of...

Merge tag 'iio-for-4.15c' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-next

Jonathan writes:

Third set of new device support, cleanups and features for IIO in the 4.15 cycle

New device support
* ti-dac082s085 dac
  - new driver supporting 8, 10 and 12 bit TI DACs with 2 and 4 channels:
    DAC082S085, DAC102S085, DAC122S085, DAC104s085 and DAC124S085.

Minor features and cleanps
* adc12138
  - make array ch_to_mux static for small object code size reduction.
* sun4i-gpadc
  - use of_device_get_match_data rather than opencoding it.
* stm32 trigger
  - add tim15 tigger on STM32H7
  - check clock rate to avoid potential division by zero
* tsl2x7x staging cleanups.
  - move *_thresh_period to being created by IIO core.
  - remove unused tsl2x7x_parse_result structure.
  - sort includes
  - drop a repeat iio_dev forward definition
  - fix some code alignment of defines.
  - use IIO_CONST_ATTR for constant string attribute
  - drop some unnecessary parentheses
  - fix various alignment with parenthese
  - rename power defines for readability reasons
  - fix a missaligned break statement
  - Tidy up function definitions so they fit on a single line.

Documentation/ABI/testing/sysfs-bus-iio

@@ -522,6 +522,7 @@ Description:
 		Specifies the output powerdown mode.
 		DAC output stage is disconnected from the amplifier and
 		1kohm_to_gnd: connected to ground via an 1kOhm resistor,
+		2.5kohm_to_gnd: connected to ground via a 2.5kOhm resistor,
 		6kohm_to_gnd: connected to ground via a 6kOhm resistor,
 		20kohm_to_gnd: connected to ground via a 20kOhm resistor,
 		90kohm_to_gnd: connected to ground via a 90kOhm resistor,

Documentation/devicetree/bindings/iio/dac/ti-dac082s085.txt

+Texas Instruments 8/10/12-bit 2/4-channel DAC driver
+
+Required properties:
+ - compatible:		Must be one of:
+			"ti,dac082s085"
+			"ti,dac102s085"
+			"ti,dac122s085"
+			"ti,dac084s085"
+			"ti,dac104s085"
+			"ti,dac124s085"
+ - reg: 		Chip select number.
+ - spi-cpha, spi-cpol:	SPI mode (0,1) or (1,0) must be used, so specify
+			either spi-cpha or spi-cpol (but not both).
+ - vref-supply: 	Phandle to the external reference voltage supply.
+
+For other required and optional properties of SPI slave nodes please refer to
+../../spi/spi-bus.txt.
+
+Example:
+	vref_2v5_reg: regulator-vref {
+		compatible = "regulator-fixed";
+		regulator-name = "2v5";
+		regulator-min-microvolt = <2500000>;
+		regulator-max-microvolt = <2500000>;
+		regulator-always-on;
+	};
+
+	dac@0 {
+		compatible = "ti,dac082s085";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+		spi-cpol;
+		vref-supply = <&vref_2v5_reg>;
+	};

drivers/iio/adc/stm32-adc-core.c

@@ -139,6 +139,11 @@ static int stm32f4_adc_clk_sel(struct platform_device *pdev,
 	}
 
 	rate = clk_get_rate(priv->aclk);
+	if (!rate) {
+		dev_err(&pdev->dev, "Invalid clock rate: 0\n");
+		return -EINVAL;
+	}
+
 	for (i = 0; i < ARRAY_SIZE(stm32f4_pclk_div); i++) {
 		if ((rate / stm32f4_pclk_div[i]) <= STM32F4_ADC_MAX_CLK_RATE)
 			break;
@@ -216,6 +221,10 @@ static int stm32h7_adc_clk_sel(struct platform_device *pdev,
 		 * From spec: PLL output musn't exceed max rate
 		 */
 		rate = clk_get_rate(priv->aclk);
+		if (!rate) {
+			dev_err(&pdev->dev, "Invalid adc clock rate: 0\n");
+			return -EINVAL;
+		}
 
 		for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) {
 			ckmode = stm32h7_adc_ckmodes_spec[i].ckmode;
@@ -232,6 +241,10 @@ static int stm32h7_adc_clk_sel(struct platform_device *pdev,
 
 	/* Synchronous clock modes (e.g. ckmode is 1, 2 or 3) */
 	rate = clk_get_rate(priv->bclk);
+	if (!rate) {
+		dev_err(&pdev->dev, "Invalid bus clock rate: 0\n");
+		return -EINVAL;
+	}
 
 	for (i = 0; i < ARRAY_SIZE(stm32h7_adc_ckmodes_spec); i++) {
 		ckmode = stm32h7_adc_ckmodes_spec[i].ckmode;

drivers/iio/adc/stm32-adc.c

@@ -531,6 +531,7 @@ static struct stm32_adc_trig_info stm32h7_adc_trigs[] = {
 	{ TIM2_TRGO, STM32_EXT11 },
 	{ TIM4_TRGO, STM32_EXT12 },
 	{ TIM6_TRGO, STM32_EXT13 },
+	{ TIM15_TRGO, STM32_EXT14 },
 	{ TIM3_CH4, STM32_EXT15 },
 	{ LPTIM1_OUT, STM32_EXT18 },
 	{ LPTIM2_OUT, STM32_EXT19 },

drivers/iio/adc/sun4i-gpadc-iio.c

@@ -501,17 +501,15 @@ static int sun4i_gpadc_probe_dt(struct platform_device *pdev,
 				struct iio_dev *indio_dev)
 {
 	struct sun4i_gpadc_iio *info = iio_priv(indio_dev);
-	const struct of_device_id *of_dev;
 	struct resource *mem;
 	void __iomem *base;
 	int ret;
 
-	of_dev = of_match_device(sun4i_gpadc_of_id, &pdev->dev);
-	if (!of_dev)
+	info->data = of_device_get_match_data(&pdev->dev);
+	if (!info->data)
 		return -ENODEV;
 
 	info->no_irq = true;
-	info->data = (struct gpadc_data *)of_dev->data;
 	indio_dev->num_channels = ARRAY_SIZE(sun8i_a33_gpadc_channels);
 	indio_dev->channels = sun8i_a33_gpadc_channels;
 

drivers/iio/adc/ti-adc12138.c

@@ -164,7 +164,7 @@ static int __adc12138_start_conv(struct adc12138 *adc,
 				 void *data, int len)
 
 {
-	const u8 ch_to_mux[] = { 0, 4, 1, 5, 2, 6, 3, 7 };
+	static const u8 ch_to_mux[] = { 0, 4, 1, 5, 2, 6, 3, 7 };
 	u8 mode = (ch_to_mux[channel->channel] << 4) |
 		  (channel->differential ? 0 : 0x80);
 

drivers/iio/dac/Kconfig

@@ -310,6 +310,16 @@ config STM32_DAC
 config STM32_DAC_CORE
 	tristate
 
+config TI_DAC082S085
+	tristate "Texas Instruments 8/10/12-bit 2/4-channel DAC driver"
+	depends on SPI_MASTER
+	help
+	  Driver for the Texas Instruments (formerly National Semiconductor)
+	  DAC082S085, DAC102S085, DAC122S085, DAC084S085, DAC104S085 and
+	  DAC124S085.
+
+	  If compiled as a module, it will be called ti-dac082s085.
+
 config VF610_DAC
 	tristate "Vybrid vf610 DAC driver"
 	depends on OF

drivers/iio/dac/Makefile

@@ -33,4 +33,5 @@ obj-$(CONFIG_MCP4725) += mcp4725.o
 obj-$(CONFIG_MCP4922) += mcp4922.o
 obj-$(CONFIG_STM32_DAC_CORE) += stm32-dac-core.o
 obj-$(CONFIG_STM32_DAC) += stm32-dac.o
+obj-$(CONFIG_TI_DAC082S085) += ti-dac082s085.o
 obj-$(CONFIG_VF610_DAC) += vf610_dac.o

drivers/iio/dac/ti-dac082s085.c

+/*
+ * ti-dac082s085.c - Texas Instruments 8/10/12-bit 2/4-channel DAC driver
+ *
+ * Copyright (C) 2017 KUNBUS GmbH
+ *
+ * http://www.ti.com/lit/ds/symlink/dac082s085.pdf
+ * http://www.ti.com/lit/ds/symlink/dac102s085.pdf
+ * http://www.ti.com/lit/ds/symlink/dac122s085.pdf
+ * http://www.ti.com/lit/ds/symlink/dac084s085.pdf
+ * http://www.ti.com/lit/ds/symlink/dac104s085.pdf
+ * http://www.ti.com/lit/ds/symlink/dac124s085.pdf
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2) as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
+
+enum { dual_8bit, dual_10bit, dual_12bit, quad_8bit, quad_10bit, quad_12bit };
+
+struct ti_dac_spec {
+	u8 num_channels;
+	u8 resolution;
+};
+
+static const struct ti_dac_spec ti_dac_spec[] = {
+	[dual_8bit]  = { .num_channels = 2, .resolution = 8  },
+	[dual_10bit] = { .num_channels = 2, .resolution = 10 },
+	[dual_12bit] = { .num_channels = 2, .resolution = 12 },
+	[quad_8bit]  = { .num_channels = 4, .resolution = 8  },
+	[quad_10bit] = { .num_channels = 4, .resolution = 10 },
+	[quad_12bit] = { .num_channels = 4, .resolution = 12 },
+};
+
+/**
+ * struct ti_dac_chip - TI DAC chip
+ * @lock: protects write sequences
+ * @vref: regulator generating Vref
+ * @mesg: SPI message to perform a write
+ * @xfer: SPI transfer used by @mesg
+ * @val: cached value of each output
+ * @powerdown: whether the chip is powered down
+ * @powerdown_mode: selected by the user
+ * @resolution: resolution of the chip
+ * @buf: buffer for @xfer
+ */
+struct ti_dac_chip {
+	struct mutex lock;
+	struct regulator *vref;
+	struct spi_message mesg;
+	struct spi_transfer xfer;
+	u16 val[4];
+	bool powerdown;
+	u8 powerdown_mode;
+	u8 resolution;
+	u8 buf[2] ____cacheline_aligned;
+};
+
+#define WRITE_NOT_UPDATE(chan)	(0x00 | (chan) << 6)
+#define WRITE_AND_UPDATE(chan)	(0x10 | (chan) << 6)
+#define WRITE_ALL_UPDATE	 0x20
+#define POWERDOWN(mode) 	(0x30 | ((mode) + 1) << 6)
+
+static int ti_dac_cmd(struct ti_dac_chip *ti_dac, u8 cmd, u16 val)
+{
+	u8 shift = 12 - ti_dac->resolution;
+
+	ti_dac->buf[0] = cmd | (val >> (8 - shift));
+	ti_dac->buf[1] = (val << shift) & 0xff;
+	return spi_sync(ti_dac->mesg.spi, &ti_dac->mesg);
+}
+
+static const char * const ti_dac_powerdown_modes[] = {
+	"2.5kohm_to_gnd", "100kohm_to_gnd", "three_state",
+};
+
+static int ti_dac_get_powerdown_mode(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan)
+{
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+
+	return ti_dac->powerdown_mode;
+}
+
+static int ti_dac_set_powerdown_mode(struct iio_dev *indio_dev,
+				     const struct iio_chan_spec *chan,
+				     unsigned int mode)
+{
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+	int ret = 0;
+
+	if (ti_dac->powerdown_mode == mode)
+		return 0;
+
+	mutex_lock(&ti_dac->lock);
+	if (ti_dac->powerdown) {
+		ret = ti_dac_cmd(ti_dac, POWERDOWN(mode), 0);
+		if (ret)
+			goto out;
+	}
+	ti_dac->powerdown_mode = mode;
+
+out:
+	mutex_unlock(&ti_dac->lock);
+	return ret;
+}
+
+static const struct iio_enum ti_dac_powerdown_mode = {
+	.items = ti_dac_powerdown_modes,
+	.num_items = ARRAY_SIZE(ti_dac_powerdown_modes),
+	.get = ti_dac_get_powerdown_mode,
+	.set = ti_dac_set_powerdown_mode,
+};
+
+static ssize_t ti_dac_read_powerdown(struct iio_dev *indio_dev,
+				     uintptr_t private,
+				     const struct iio_chan_spec *chan,
+				     char *buf)
+{
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+
+	return sprintf(buf, "%d\n", ti_dac->powerdown);
+}
+
+static ssize_t ti_dac_write_powerdown(struct iio_dev *indio_dev,
+				      uintptr_t private,
+				      const struct iio_chan_spec *chan,
+				      const char *buf, size_t len)
+{
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+	bool powerdown;
+	int ret;
+
+	ret = strtobool(buf, &powerdown);
+	if (ret)
+		return ret;
+
+	if (ti_dac->powerdown == powerdown)
+		return len;
+
+	mutex_lock(&ti_dac->lock);
+	if (powerdown)
+		ret = ti_dac_cmd(ti_dac, POWERDOWN(ti_dac->powerdown_mode), 0);
+	else
+		ret = ti_dac_cmd(ti_dac, WRITE_AND_UPDATE(0), ti_dac->val[0]);
+	if (!ret)
+		ti_dac->powerdown = powerdown;
+	mutex_unlock(&ti_dac->lock);
+
+	return ret ? ret : len;
+}
+
+static const struct iio_chan_spec_ext_info ti_dac_ext_info[] = {
+	{
+		.name	   = "powerdown",
+		.read	   = ti_dac_read_powerdown,
+		.write	   = ti_dac_write_powerdown,
+		.shared	   = IIO_SHARED_BY_TYPE,
+	},
+	IIO_ENUM("powerdown_mode", IIO_SHARED_BY_TYPE, &ti_dac_powerdown_mode),
+	IIO_ENUM_AVAILABLE("powerdown_mode", &ti_dac_powerdown_mode),
+	{ },
+};
+
+#define TI_DAC_CHANNEL(chan) {					\
+	.type = IIO_VOLTAGE,					\
+	.channel = (chan),					\
+	.address = (chan),					\
+	.indexed = true,					\
+	.output = true,						\
+	.datasheet_name = (const char[]){ 'A' + (chan), 0 },	\
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
+	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
+	.ext_info = ti_dac_ext_info,				\
+}
+
+static const struct iio_chan_spec ti_dac_channels[] = {
+	TI_DAC_CHANNEL(0),
+	TI_DAC_CHANNEL(1),
+	TI_DAC_CHANNEL(2),
+	TI_DAC_CHANNEL(3),
+};
+
+static int ti_dac_read_raw(struct iio_dev *indio_dev,
+			   struct iio_chan_spec const *chan,
+			   int *val, int *val2, long mask)
+{
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		*val = ti_dac->val[chan->channel];
+		ret = IIO_VAL_INT;
+		break;
+
+	case IIO_CHAN_INFO_SCALE:
+		ret = regulator_get_voltage(ti_dac->vref);
+		if (ret < 0)
+			return ret;
+
+		*val = ret / 1000;
+		*val2 = ti_dac->resolution;
+		ret = IIO_VAL_FRACTIONAL_LOG2;
+		break;
+
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int ti_dac_write_raw(struct iio_dev *indio_dev,
+			    struct iio_chan_spec const *chan,
+			    int val, int val2, long mask)
+{
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+	int ret;
+
+	switch (mask) {
+	case IIO_CHAN_INFO_RAW:
+		if (ti_dac->val[chan->channel] == val)
+			return 0;
+
+		if (val >= (1 << ti_dac->resolution) || val < 0)
+			return -EINVAL;
+
+		if (ti_dac->powerdown)
+			return -EBUSY;
+
+		mutex_lock(&ti_dac->lock);
+		ret = ti_dac_cmd(ti_dac, WRITE_AND_UPDATE(chan->channel), val);
+		if (!ret)
+			ti_dac->val[chan->channel] = val;
+		mutex_unlock(&ti_dac->lock);
+		break;
+
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int ti_dac_write_raw_get_fmt(struct iio_dev *indio_dev,
+				    struct iio_chan_spec const *chan, long mask)
+{
+	return IIO_VAL_INT;
+}
+
+static const struct iio_info ti_dac_info = {
+	.read_raw	   = ti_dac_read_raw,
+	.write_raw	   = ti_dac_write_raw,
+	.write_raw_get_fmt = ti_dac_write_raw_get_fmt,
+};
+
+static int ti_dac_probe(struct spi_device *spi)
+{
+	struct device *dev = &spi->dev;
+	const struct ti_dac_spec *spec;
+	struct ti_dac_chip *ti_dac;
+	struct iio_dev *indio_dev;
+	int ret;
+
+	indio_dev = devm_iio_device_alloc(dev, sizeof(*ti_dac));
+	if (!indio_dev)
+		return -ENOMEM;
+
+	indio_dev->dev.parent = dev;
+	indio_dev->info = &ti_dac_info;
+	indio_dev->name = spi->modalias;
+	indio_dev->modes = INDIO_DIRECT_MODE;
+	indio_dev->channels = ti_dac_channels;
+	spi_set_drvdata(spi, indio_dev);
+
+	ti_dac = iio_priv(indio_dev);
+	ti_dac->xfer.tx_buf = &ti_dac->buf;
+	ti_dac->xfer.len = sizeof(ti_dac->buf);
+	spi_message_init_with_transfers(&ti_dac->mesg, &ti_dac->xfer, 1);
+	ti_dac->mesg.spi = spi;
+
+	spec = &ti_dac_spec[spi_get_device_id(spi)->driver_data];
+	indio_dev->num_channels = spec->num_channels;
+	ti_dac->resolution = spec->resolution;
+
+	ti_dac->vref = devm_regulator_get(dev, "vref");
+	if (IS_ERR(ti_dac->vref))
+		return PTR_ERR(ti_dac->vref);
+
+	ret = regulator_enable(ti_dac->vref);
+	if (ret < 0)
+		return ret;
+
+	mutex_init(&ti_dac->lock);
+
+	ret = ti_dac_cmd(ti_dac, WRITE_ALL_UPDATE, 0);
+	if (ret) {
+		dev_err(dev, "failed to initialize outputs to 0\n");
+		goto err;
+	}
+
+	ret = iio_device_register(indio_dev);
+	if (ret)
+		goto err;
+
+	return 0;
+
+err:
+	mutex_destroy(&ti_dac->lock);
+	regulator_disable(ti_dac->vref);
+	return ret;
+}
+
+static int ti_dac_remove(struct spi_device *spi)
+{
+	struct iio_dev *indio_dev = spi_get_drvdata(spi);
+	struct ti_dac_chip *ti_dac = iio_priv(indio_dev);
+
+	iio_device_unregister(indio_dev);
+	mutex_destroy(&ti_dac->lock);
+	regulator_disable(ti_dac->vref);
+
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id ti_dac_of_id[] = {
+	{ .compatible = "ti,dac082s085" },
+	{ .compatible = "ti,dac102s085" },
+	{ .compatible = "ti,dac122s085" },
+	{ .compatible = "ti,dac084s085" },
+	{ .compatible = "ti,dac104s085" },
+	{ .compatible = "ti,dac124s085" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, ti_dac_of_id);
+#endif
+
+static const struct spi_device_id ti_dac_spi_id[] = {
+	{ "dac082s085", dual_8bit  },
+	{ "dac102s085", dual_10bit },
+	{ "dac122s085", dual_12bit },
+	{ "dac084s085", quad_8bit  },
+	{ "dac104s085", quad_10bit },
+	{ "dac124s085", quad_12bit },
+	{ }
+};
+MODULE_DEVICE_TABLE(spi, ti_dac_spi_id);
+
+static struct spi_driver ti_dac_driver = {
+	.driver = {
+		.name		= "ti-dac082s085",
+		.of_match_table	= of_match_ptr(ti_dac_of_id),
+	},
+	.probe	  = ti_dac_probe,
+	.remove   = ti_dac_remove,
+	.id_table = ti_dac_spi_id,
+};
+module_spi_driver(ti_dac_driver);
+
+MODULE_AUTHOR("Lukas Wunner <lukas@wunner.de>");
+MODULE_DESCRIPTION("Texas Instruments 8/10/12-bit 2/4-channel DAC driver");
+MODULE_LICENSE("GPL v2");

drivers/staging/iio/light/tsl2x7x.c

@@ -15,14 +15,14 @@
  * more details.
  */
 
-#include <linux/kernel.h>
-#include <linux/i2c.h>
-#include <linux/errno.h>
 #include <linux/delay.h>
-#include <linux/mutex.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
 #include <linux/interrupt.h>
-#include <linux/slab.h>
+#include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/slab.h>
 #include <linux/iio/events.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -91,7 +91,7 @@
 /* tsl2X7X status reg masks */
 #define TSL2X7X_STA_ADC_VALID		0x01
 #define TSL2X7X_STA_PRX_VALID		0x02
-#define TSL2X7X_STA_ADC_PRX_VALID      (TSL2X7X_STA_ADC_VALID |\
+#define TSL2X7X_STA_ADC_PRX_VALID	(TSL2X7X_STA_ADC_VALID | \
 					 TSL2X7X_STA_PRX_VALID)
 #define TSL2X7X_STA_ALS_INTR		0x10
 #define TSL2X7X_STA_PRX_INTR		0x20
@@ -114,11 +114,11 @@
 #define TSL2X7X_DIODE_BOTH		0x30
 
 /* LED Power */
-#define TSL2X7X_mA100                  0x00
-#define TSL2X7X_mA50                   0x40
-#define TSL2X7X_mA25                   0x80
-#define TSL2X7X_mA13                   0xD0
-#define TSL2X7X_MAX_TIMER_CNT          (0xFF)
+#define TSL2X7X_100_mA			0x00
+#define TSL2X7X_50_mA			0x40
+#define TSL2X7X_25_mA			0x80
+#define TSL2X7X_13_mA			0xD0
+#define TSL2X7X_MAX_TIMER_CNT		0xFF
 
 #define TSL2X7X_MIN_ITIME		3
 
@@ -142,11 +142,6 @@ enum {
 	TSL2X7X_CHIP_SUSPENDED = 2
 };
 
-struct tsl2x7x_parse_result {
-	int integer;
-	int fract;
-};
-
 /* Per-device data */
 struct tsl2x7x_als_info {
 	u16 als_ch0;
@@ -248,14 +243,14 @@ static const struct tsl2x7x_settings tsl2x7x_default_settings = {
 	.prox_pulse_count = 8
 };
 
-static const s16 tsl2X7X_als_gainadj[] = {
+static const s16 tsl2x7x_als_gain[] = {
 	1,
 	8,
 	16,
 	120
 };
 
-static const s16 tsl2X7X_prx_gainadj[] = {
+static const s16 tsl2x7x_prx_gain[] = {
 	1,
 	2,
 	4,
@@ -353,9 +348,9 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
 
 	/* clear any existing interrupt status */
 	ret = i2c_smbus_write_byte(chip->client,
-				   (TSL2X7X_CMD_REG |
+				   TSL2X7X_CMD_REG |
 				   TSL2X7X_CMD_SPL_FN |
-				   TSL2X7X_CMD_ALS_INT_CLR));
+				   TSL2X7X_CMD_ALS_INT_CLR);
 	if (ret < 0) {
 		dev_err(&chip->client->dev,
 			"i2c_write_command failed - err = %d\n", ret);
@@ -369,7 +364,7 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
 	chip->als_cur_info.als_ch0 = ch0;
 	chip->als_cur_info.als_ch1 = ch1;
 
-	if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation)) {
+	if (ch0 >= chip->als_saturation || ch1 >= chip->als_saturation) {
 		lux = TSL2X7X_LUX_CALC_OVER_FLOW;
 		goto return_max;
 	}
@@ -389,11 +384,10 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
 	if (p->ratio == 0) {
 		lux = 0;
 	} else {
-		ch0lux = DIV_ROUND_UP(ch0 * p->ch0,
-			tsl2X7X_als_gainadj[chip->settings.als_gain]);
-		ch1lux = DIV_ROUND_UP(ch1 * p->ch1,
-			tsl2X7X_als_gainadj[chip->settings.als_gain]);
-		lux = ch0lux - ch1lux;
+		lux = DIV_ROUND_UP(ch0 * p->ch0,
+				   tsl2x7x_als_gain[chip->settings.als_gain]) -
+		      DIV_ROUND_UP(ch1 * p->ch1,
+				   tsl2x7x_als_gain[chip->settings.als_gain]);
 	}
 
 	/* note: lux is 31 bit max at this point */
@@ -527,7 +521,7 @@ static void tsl2x7x_defaults(struct tsl2X7X_chip *chip)
 		       sizeof(chip->pdata->platform_lux_table));
 	else
 		memcpy(chip->tsl2x7x_device_lux,
-		(struct tsl2x7x_lux *)tsl2x7x_default_lux_table_group[chip->id],
+		       tsl2x7x_default_lux_table_group[chip->id],
 		       TSL2X7X_DEFAULT_TABLE_BYTES);
 }
 
@@ -642,7 +636,7 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
 	/* Set the gain based on tsl2x7x_settings struct */
 	chip->tsl2x7x_config[TSL2X7X_GAIN] =
 		chip->settings.als_gain |
-			(TSL2X7X_mA100 | TSL2X7X_DIODE1) |
+			(TSL2X7X_100_mA | TSL2X7X_DIODE1) |
 			(chip->settings.prox_gain << 2);
 
 	/* set chip struct re scaling and saturation */
@@ -702,14 +696,14 @@ static int tsl2x7x_chip_on(struct iio_dev *indio_dev)
 		dev_info(&chip->client->dev, "Setting Up Interrupt(s)\n");
 
 		reg_val = TSL2X7X_CNTL_PWR_ON | TSL2X7X_CNTL_ADC_ENBL;
-		if ((chip->settings.interrupts_en == 0x20) ||
-		    (chip->settings.interrupts_en == 0x30))
+		if (chip->settings.interrupts_en == 0x20 ||
+		    chip->settings.interrupts_en == 0x30)
 			reg_val |= TSL2X7X_CNTL_PROX_DET_ENBL;
 
 		reg_val |= chip->settings.interrupts_en;
 		ret = i2c_smbus_write_byte_data(chip->client,
-						(TSL2X7X_CMD_REG |
-						TSL2X7X_CNTRL), reg_val);
+						TSL2X7X_CMD_REG | TSL2X7X_CNTRL,
+						reg_val);
 		if (ret < 0)
 			dev_err(&chip->client->dev,
 				"%s: failed in tsl2x7x_IOCTL_INT_SET.\n",
@@ -758,8 +752,7 @@ static int tsl2x7x_chip_off(struct iio_dev *indio_dev)
  * put device back into proper state, and unlock
  * resource.
  */
-static
-int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
+static int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
 {
 	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
 	int device_status = chip->tsl2x7x_chip_status;
@@ -783,8 +776,7 @@ int tsl2x7x_invoke_change(struct iio_dev *indio_dev)
 	return ret;
 }
 
-static
-void tsl2x7x_prox_calculate(int *data, int length,
+static void tsl2x7x_prox_calculate(int *data, int length,
 				   struct tsl2x7x_prox_stat *statP)
 {
 	int i;
@@ -873,7 +865,8 @@ static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
 		tsl2x7x_chip_on(indio_dev);
 }
 
-static ssize_t in_illuminance0_calibscale_available_show(struct device *dev,
+static ssize_t
+in_illuminance0_calibscale_available_show(struct device *dev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
@@ -891,12 +884,7 @@ static ssize_t in_illuminance0_calibscale_available_show(struct device *dev,
 	return snprintf(buf, PAGE_SIZE, "%s\n", "1 8 16 120");
 }
 
-static ssize_t in_proximity0_calibscale_available_show(struct device *dev,
-						struct device_attribute *attr,
-						char *buf)
-{
-		return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
-}
+static IIO_CONST_ATTR(in_proximity0_calibscale_available, "1 2 4 8");
 
 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
 		".00272 - .696");
@@ -932,108 +920,6 @@ static ssize_t in_illuminance0_target_input_store(struct device *dev,
 	return len;
 }
 
-/* persistence settings */
-static ssize_t in_intensity0_thresh_period_show(struct device *dev,
-					    struct device_attribute *attr,
-					    char *buf)
-{
-	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
-	int y, z, filter_delay;
-
-	/* Determine integration time */
-	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->settings.als_time) + 1;
-	z = y * TSL2X7X_MIN_ITIME;
-	filter_delay = z * (chip->settings.persistence & 0x0F);
-	y = filter_delay / 1000;
-	z = filter_delay % 1000;
-
-	return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
-}
-
-static ssize_t in_intensity0_thresh_period_store(struct device *dev,
-					     struct device_attribute *attr,
-					     const char *buf, size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
-	struct tsl2x7x_parse_result result;
-	int y, z, filter_delay;
-	int ret;
-
-	ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
-	if (ret)
-		return ret;
-
-	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->settings.als_time) + 1;
-	z = y * TSL2X7X_MIN_ITIME;
-
-	filter_delay =
-		DIV_ROUND_UP((result.integer * 1000) + result.fract, z);
-
-	chip->settings.persistence &= 0xF0;
-	chip->settings.persistence |= (filter_delay & 0x0F);
-
-	dev_info(&chip->client->dev, "%s: als persistence = %d",
-		 __func__, filter_delay);
-
-	ret = tsl2x7x_invoke_change(indio_dev);
-	if (ret < 0)
-		return ret;
-
-	return IIO_VAL_INT_PLUS_MICRO;
-}
-
-static ssize_t in_proximity0_thresh_period_show(struct device *dev,
-					     struct device_attribute *attr,
-					     char *buf)
-{
-	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
-	int y, z, filter_delay;
-
-	/* Determine integration time */
-	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->settings.prx_time) + 1;
-	z = y * TSL2X7X_MIN_ITIME;
-	filter_delay = z * ((chip->settings.persistence & 0xF0) >> 4);
-	y = filter_delay / 1000;
-	z = filter_delay % 1000;
-
-	return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
-}
-
-static ssize_t in_proximity0_thresh_period_store(struct device *dev,
-					      struct device_attribute *attr,
-					      const char *buf, size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
-	struct tsl2x7x_parse_result result;
-	int y, z, filter_delay;
-	int ret;
-
-	ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
-	if (ret)
-		return ret;
-
-	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->settings.prx_time) + 1;
-	z = y * TSL2X7X_MIN_ITIME;
-
-	filter_delay =
-		DIV_ROUND_UP((result.integer * 1000) + result.fract, z);
-
-	chip->settings.persistence &= 0x0F;
-	chip->settings.persistence |= ((filter_delay << 4) & 0xF0);
-
-	dev_info(&chip->client->dev, "%s: prox persistence = %d",
-		 __func__, filter_delay);
-
-	ret = tsl2x7x_invoke_change(indio_dev);
-	if (ret < 0)
-		return ret;
-
-
-	return IIO_VAL_INT_PLUS_MICRO;
-}
-
 static ssize_t in_illuminance0_calibrate_store(struct device *dev,
 					       struct device_attribute *attr,
 					       const char *buf, size_t len)
@@ -1198,7 +1084,8 @@ static int tsl2x7x_write_event_value(struct iio_dev *indio_dev,
 				     int val, int val2)
 {
 	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
-	int ret = -EINVAL;
+	int ret = -EINVAL, y, z, filter_delay;
+	u8 time;
 
 	switch (info) {
 	case IIO_EV_INFO_VALUE:
@@ -1230,6 +1117,33 @@ static int tsl2x7x_write_event_value(struct iio_dev *indio_dev,
 			}
 		}
 		break;
+	case IIO_EV_INFO_PERIOD:
+		if (chan->type == IIO_INTENSITY)
+			time = chip->settings.als_time;
+		else
+			time = chip->settings.prx_time;
+
+		y = (TSL2X7X_MAX_TIMER_CNT - time) + 1;
+		z = y * TSL2X7X_MIN_ITIME;
+
+		filter_delay = DIV_ROUND_UP((val * 1000) + val2, z);
+
+		if (chan->type == IIO_INTENSITY) {
+			chip->settings.persistence &= 0xF0;
+			chip->settings.persistence |=
+				(filter_delay & 0x0F);
+			dev_info(&chip->client->dev, "%s: ALS persistence = %d",
+				 __func__, filter_delay);
+		} else {
+			chip->settings.persistence &= 0x0F;
+			chip->settings.persistence |=
+				((filter_delay << 4) & 0xF0);
+			dev_info(&chip->client->dev,
+				 "%s: Proximity persistence = %d",
+				 __func__, filter_delay);
+		}
+		ret = 0;
+		break;
 	default:
 		break;
 	}
@@ -1248,7 +1162,8 @@ static int tsl2x7x_read_event_value(struct iio_dev *indio_dev,
 				    int *val, int *val2)
 {
 	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
-	int ret = -EINVAL;
+	int ret = -EINVAL, filter_delay, mult;
+	u8 time;
 
 	switch (info) {
 	case IIO_EV_INFO_VALUE:
@@ -1280,6 +1195,23 @@ static int tsl2x7x_read_event_value(struct iio_dev *indio_dev,
 			}
 		}
 		break;
+	case IIO_EV_INFO_PERIOD:
+		if (chan->type == IIO_INTENSITY) {
+			time = chip->settings.als_time;
+			mult = chip->settings.persistence & 0x0F;
+		} else {
+			time = chip->settings.prx_time;
+			mult = (chip->settings.persistence & 0xF0) >> 4;
+		}
+
+		/* Determine integration time */
+		*val = (TSL2X7X_MAX_TIMER_CNT - time) + 1;
+		*val2 = *val * TSL2X7X_MIN_ITIME;
+		filter_delay = *val2 * mult;
+		*val = filter_delay / 1000;
+		*val2 = filter_delay % 1000;
+		ret = IIO_VAL_INT_PLUS_MICRO;
+		break;
 	default:
 		break;
 	}
@@ -1329,9 +1261,9 @@ static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
 		break;
 	case IIO_CHAN_INFO_CALIBSCALE:
 		if (chan->type == IIO_LIGHT)
-			*val = tsl2X7X_als_gainadj[chip->settings.als_gain];
+			*val = tsl2x7x_als_gain[chip->settings.als_gain];
 		else
-			*val = tsl2X7X_prx_gainadj[chip->settings.prox_gain];
+			*val = tsl2x7x_prx_gain[chip->settings.prox_gain];
 		ret = IIO_VAL_INT;
 		break;
 	case IIO_CHAN_INFO_CALIBBIAS:
@@ -1432,8 +1364,6 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
 	return tsl2x7x_invoke_change(indio_dev);
 }
 
-static DEVICE_ATTR_RO(in_proximity0_calibscale_available);
-
 static DEVICE_ATTR_RO(in_illuminance0_calibscale_available);
 
 static DEVICE_ATTR_RW(in_illuminance0_target_input);
@@ -1444,10 +1374,6 @@ static DEVICE_ATTR_WO(in_proximity0_calibrate);
 
 static DEVICE_ATTR_RW(in_illuminance0_lux_table);
 
-static DEVICE_ATTR_RW(in_intensity0_thresh_period);
-
-static DEVICE_ATTR_RW(in_proximity0_thresh_period);
-
 /* Use the default register values to identify the Taos device */
 static int tsl2x7x_device_id(int *id, int target)
 {
@@ -1533,13 +1459,13 @@ static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
 	&dev_attr_in_illuminance0_target_input.attr,
 	&dev_attr_in_illuminance0_calibrate.attr,
 	&dev_attr_in_illuminance0_lux_table.attr,
-	&dev_attr_in_proximity0_calibrate.attr,
+	&iio_const_attr_in_proximity0_calibscale_available.dev_attr.attr,
 	NULL
 };
 
 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
 	&dev_attr_in_proximity0_calibrate.attr,
-	&dev_attr_in_proximity0_calibscale_available.attr,
+	&iio_const_attr_in_proximity0_calibscale_available.dev_attr.attr,
 	NULL
 };
 
@@ -1550,26 +1476,10 @@ static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
 	&dev_attr_in_illuminance0_calibrate.attr,
 	&dev_attr_in_illuminance0_lux_table.attr,
 	&dev_attr_in_proximity0_calibrate.attr,
-	&dev_attr_in_proximity0_calibscale_available.attr,
+	&iio_const_attr_in_proximity0_calibscale_available.dev_attr.attr,
 	NULL
 };
 
-static struct attribute *tsl2X7X_ALS_event_attrs[] = {
-	&dev_attr_in_intensity0_thresh_period.attr,
-	NULL,
-};
-
-static struct attribute *tsl2X7X_PRX_event_attrs[] = {
-	&dev_attr_in_proximity0_thresh_period.attr,
-	NULL,
-};
-
-static struct attribute *tsl2X7X_ALSPRX_event_attrs[] = {
-	&dev_attr_in_intensity0_thresh_period.attr,
-	&dev_attr_in_proximity0_thresh_period.attr,
-	NULL,
-};
-
 static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
 	[ALS] = {
 		.attrs = tsl2x7x_ALS_device_attrs,
@@ -1588,25 +1498,9 @@ static const struct attribute_group tsl2X7X_device_attr_group_tbl[] = {
 	},
 };
 
-static const struct attribute_group tsl2X7X_event_attr_group_tbl[] = {
-	[ALS] = {
-		.attrs = tsl2X7X_ALS_event_attrs,
-		.name = "events",
-	},
-	[PRX] = {
-		.attrs = tsl2X7X_PRX_event_attrs,
-		.name = "events",
-	},
-	[ALSPRX] = {
-		.attrs = tsl2X7X_ALSPRX_event_attrs,
-		.name = "events",
-	},
-};
-
 static const struct iio_info tsl2X7X_device_info[] = {
 	[ALS] = {
 		.attrs = &tsl2X7X_device_attr_group_tbl[ALS],
-		.event_attrs = &tsl2X7X_event_attr_group_tbl[ALS],
 		.read_raw = &tsl2x7x_read_raw,
 		.write_raw = &tsl2x7x_write_raw,
 		.read_event_value = &tsl2x7x_read_event_value,
@@ -1616,7 +1510,6 @@ static const struct iio_info tsl2X7X_device_info[] = {
 	},
 	[PRX] = {
 		.attrs = &tsl2X7X_device_attr_group_tbl[PRX],
-		.event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
 		.read_raw = &tsl2x7x_read_raw,
 		.write_raw = &tsl2x7x_write_raw,
 		.read_event_value = &tsl2x7x_read_event_value,
@@ -1626,7 +1519,6 @@ static const struct iio_info tsl2X7X_device_info[] = {
 	},
 	[ALSPRX] = {
 		.attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX],
-		.event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
 		.read_raw = &tsl2x7x_read_raw,
 		.write_raw = &tsl2x7x_write_raw,
 		.read_event_value = &tsl2x7x_read_event_value,
@@ -1636,7 +1528,6 @@ static const struct iio_info tsl2X7X_device_info[] = {
 	},
 	[PRX2] = {
 		.attrs = &tsl2X7X_device_attr_group_tbl[PRX2],
-		.event_attrs = &tsl2X7X_event_attr_group_tbl[PRX],
 		.read_raw = &tsl2x7x_read_raw,
 		.write_raw = &tsl2x7x_write_raw,
 		.read_event_value = &tsl2x7x_read_event_value,
@@ -1646,7 +1537,6 @@ static const struct iio_info tsl2X7X_device_info[] = {
 	},
 	[ALSPRX2] = {
 		.attrs = &tsl2X7X_device_attr_group_tbl[ALSPRX2],
-		.event_attrs = &tsl2X7X_event_attr_group_tbl[ALSPRX],
 		.read_raw = &tsl2x7x_read_raw,
 		.write_raw = &tsl2x7x_write_raw,
 		.read_event_value = &tsl2x7x_read_event_value,
@@ -1667,6 +1557,10 @@ static const struct iio_event_spec tsl2x7x_events[] = {
 		.dir = IIO_EV_DIR_FALLING,
 		.mask_separate = BIT(IIO_EV_INFO_VALUE) |
 			BIT(IIO_EV_INFO_ENABLE),
+	}, {
+		.type = IIO_EV_TYPE_THRESH,
+		.dir = IIO_EV_DIR_EITHER,
+		.mask_separate = BIT(IIO_EV_INFO_PERIOD),
 	},
 };
 
@@ -1825,7 +1719,7 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
 		return -EINVAL;
 	}
 
-	ret = i2c_smbus_write_byte(clientp, (TSL2X7X_CMD_REG | TSL2X7X_CNTRL));
+	ret = i2c_smbus_write_byte(clientp, TSL2X7X_CMD_REG | TSL2X7X_CNTRL);
 	if (ret < 0) {
 		dev_err(&clientp->dev, "write to cmd reg failed. err = %d\n",
 			ret);

drivers/staging/iio/light/tsl2x7x.h

@@ -23,8 +23,6 @@
 #define __TSL2X7X_H
 #include <linux/pm.h>
 
-struct iio_dev;
-
 struct tsl2x7x_lux {
 	unsigned int ratio;
 	unsigned int ch0;