Added Vishay Capella CM36672 Proximity Sensor IIO driver. Support both ACPI and Device Tree. Signed-off-by: Kevin Tsai <capellamicro@xxxxxxxxx> --- V2: Thanks commends from Peter Meerwald-Stadler, Jonathan Cameron, and Linux Walleij. Updated for the following: - Remove unused defines. - Rewrite event registration. - Remove direct register values in the device tree. - Rewrite by regmap API. - Remove irq module parameter. - Correct cm36672_remove(). .../devicetree/bindings/iio/light/cm36672.txt | 37 + MAINTAINERS | 4 +- drivers/iio/light/Kconfig | 11 + drivers/iio/light/Makefile | 1 + drivers/iio/light/cm36672.c | 820 +++++++++++++++++++++ 5 files changed, 871 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/iio/light/cm36672.txt create mode 100644 drivers/iio/light/cm36672.c diff --git a/Documentation/devicetree/bindings/iio/light/cm36672.txt b/Documentation/devicetree/bindings/iio/light/cm36672.txt new file mode 100644 index 0000000..9681d2c --- /dev/null +++ b/Documentation/devicetree/bindings/iio/light/cm36672.txt @@ -0,0 +1,37 @@ +* Vishay Capella CM36672 I2C Proximity sensor + +Required properties: +- compatible: must be capella,cm36672" +- reg: the I2C slave address, usually 0x60 +- interrupts: interrupt mapping for GPIO IRQ + +Optional properties: +- interrupt-parent: interrupt controller +- interrupts: interrupt mapping for GPIO IRQ +- cm36672,prx_led_current: LED current, must be one of the following values: + - 0: 50mA + - 1: 75mA + - 2: 100mA + - 3: 120mA + - 4: 140mA + - 5: 160mA + - 6: 180mA + - 7: 200mA +- cm36672,prx_hd: width of proximity sensor output data, must be one of the + following values: + - 0: 12-bit + - 1: 16-bit + +Example: + + cm36672@60 { + compatible = "capella,cm36672"; + reg = <0x60>; + interrupt-parent = <&gpio0>; + interrupts = <30 0>; + + /* cm36672-specific properties */ + cm36672,prx_led_current = <2>; + cm36672,prx_hd = <1>; + }; + diff --git a/MAINTAINERS b/MAINTAINERS index ed42cb6..9618af4 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2822,10 +2822,10 @@ F: security/commoncap.c F: kernel/capability.c CAPELLA MICROSYSTEMS LIGHT SENSOR DRIVER -M: Kevin Tsai <ktsai@xxxxxxxxxxxxxxxx> +M: Kevin Tsai <capellamicro@xxxxxxxxx> S: Maintained F: drivers/iio/light/cm* -F: Documentation/devicetree/bindings/i2c/trivial-devices.txt +F: Documentation/devicetree/bindings/iio/light/cm* CAVIUM LIQUIDIO NETWORK DRIVER M: Derek Chickles <derek.chickles@xxxxxxxxxxxxxxxxxx> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig index 7c566f5..cb5052a 100644 --- a/drivers/iio/light/Kconfig +++ b/drivers/iio/light/Kconfig @@ -127,6 +127,17 @@ config CM36651 To compile this driver as a module, choose M here: the module will be called cm36651. +config CM36672 + depends on I2C + tristate "CM36672 driver" + help + Say Y here if you use cm36672. + This option enables proximity sensors using Vishay + Capella cm36672 device driver. + + To compile this driver as a module, choose M here: + the module will be called cm36672. + config GP2AP020A00F tristate "Sharp GP2AP020A00F Proximity/ALS sensor" depends on I2C diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile index 6f2a3c6..b155425 100644 --- a/drivers/iio/light/Makefile +++ b/drivers/iio/light/Makefile @@ -14,6 +14,7 @@ obj-$(CONFIG_CM32181) += cm32181.o obj-$(CONFIG_CM3232) += cm3232.o obj-$(CONFIG_CM3323) += cm3323.o obj-$(CONFIG_CM36651) += cm36651.o +obj-$(CONFIG_CM36672) += cm36672.o obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o diff --git a/drivers/iio/light/cm36672.c b/drivers/iio/light/cm36672.c new file mode 100644 index 0000000..975629f --- /dev/null +++ b/drivers/iio/light/cm36672.c @@ -0,0 +1,820 @@ +/* + * CM36672 Proximity Sensor + * + * Copyright (C) 2014-2016 Vishay Capella + * Author: Kevin Tsai <capellamicro@xxxxxxxxx> + * + * 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. + * + * IIO driver for CM36672 (7-bit I2C slave address 0x60). + */ +#include <linux/kernel.h> +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/interrupt.h> +#include <linux/regmap.h> +#include <linux/gpio.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/events.h> + +#ifdef CONFIG_ACPI +#include <linux/acpi.h> +#endif + +#define CM36672_DRIVER_NAME "cm36672" +#define CM36672_REGMAP_NAME "cm36672_regmap" + +/* Sensor registers */ +#define CM36672_ADDR_PRX_CONF 0x03 +#define CM36672_ADDR_PRX_CONF3 0x04 +#define CM36672_ADDR_PRX_THDL 0x06 +#define CM36672_ADDR_PRX_THDH 0x07 +#define CM36672_REGS_NUM 0x08 +/* Read only registers */ +#define CM36672_ADDR_PRX 0x08 +#define CM36672_ADDR_STATUS 0x0B + +/* PRX_CONF */ +#define CM36672_PRX_HD_SHIFT 11 +#define CM36672_PRX_HD (1 << CM36672_PRX_HD_SHIFT) + +/* PRX_CONF: interrupt */ +#define CM36672_PRX_INT_THDH BIT(8) +#define CM36672_PRX_INT_THDL BIT(9) +#define CM36672_PRX_INT_MASK (CM36672_PRX_INT_THDH | \ + CM36672_PRX_INT_THDL) + +/* PRX_CONF: persistence */ +#define CM36672_PRX_PERS_MASK (BIT(4) | BIT(5)) +#define CM36672_PRX_PERS_SHIFT 4 +#define CM36672_PRX_PERS_DISABLE 0 +#define CM36672_PRX_PERS_2 (1 << CM36672_PRX_PERS_SHIFT) +#define CM36672_PRX_PERS_3 (2 << CM36672_PRX_PERS_SHIFT) +#define CM36672_PRX_PERS_4 (3 << CM36672_PRX_PERS_SHIFT) + +/* PRX_CONF: integration time */ +#define CM36672_PRX_IT_MASK (BIT(1) | BIT(2) | BIT(3)) +#define CM36672_PRX_IT_SHIFT 1 +#define CM36672_PRX_IT_1T 0 +#define CM36672_PRX_IT_1_5T (1 << CM36672_PRX_IT_SHIFT) +#define CM36672_PRX_IT_2T (2 << CM36672_PRX_IT_SHIFT) +#define CM36672_PRX_IT_2_5T (3 << CM36672_PRX_IT_SHIFT) +#define CM36672_PRX_IT_3T (4 << CM36672_PRX_IT_SHIFT) +#define CM36672_PRX_IT_3_5T (5 << CM36672_PRX_IT_SHIFT) +#define CM36672_PRX_IT_4T (6 << CM36672_PRX_IT_SHIFT) +#define CM36672_PRX_IT_8T (7 << CM36672_PRX_IT_SHIFT) + +/* PRX_CONF3 */ +#define CM36672_PRX_LED_I_MASK (BIT(8) | BIT(9) | BIT(10)) +#define CM36672_PRX_LED_I_SHIFT 8 +#define CM36672_PRX_LED_I_50MA 0 +#define CM36672_PRX_LED_I_75MA (1 << CM36672_PRX_LED_I_SHIFT) +#define CM36672_PRX_LED_I_100MA (2 << CM36672_PRX_LED_I_SHIFT) +#define CM36672_PRX_LED_I_120MA (3 << CM36672_PRX_LED_I_SHIFT) +#define CM36672_PRX_LED_I_140MA (4 << CM36672_PRX_LED_I_SHIFT) +#define CM36672_PRX_LED_I_160MA (5 << CM36672_PRX_LED_I_SHIFT) +#define CM36672_PRX_LED_I_180MA (6 << CM36672_PRX_LED_I_SHIFT) +#define CM36672_PRX_LED_I_200MA (7 << CM36672_PRX_LED_I_SHIFT) + +/* INT_FLAG */ +#define CM36672_INT_PRX_CLOSE BIT(9) +#define CM36672_INT_PRX_AWAY BIT(8) + +struct cm36672_it_scale { + u8 it; + int val; + int val2; +}; + +static const struct cm36672_it_scale cm36672_prx_it_scales[] = { + {0, 0, 100}, /* 0.00010 */ + {1, 0, 150}, /* 0.00015 */ + {2, 0, 200}, /* 0.00020 */ + {3, 0, 250}, /* 0.00025 */ + {4, 0, 300}, /* 0.00030 */ + {5, 0, 350}, /* 0.00035 */ + {6, 0, 400}, /* 0.00040 */ + {7, 0, 800}, /* 0.00080 */ +}; + +#define CM36672_PRX_INT_TIME_AVAIL \ + "0.000100 0.000150 0.000200 0.000250 " \ + "0.000300 0.000350 0.000400 0.000800" + +static const u16 cm36672_regs_default[] = { + 0x0001, + 0x0000, + 0x0000, + CM36672_PRX_INT_THDH | CM36672_PRX_INT_THDL | + CM36672_PRX_IT_2T | CM36672_PRX_PERS_3, + CM36672_PRX_LED_I_100MA, + 0x0000, + 0x0005, + 0x000A, +}; + +struct cm36672_chip { + const struct cm36672_platform_data *pdata; + struct i2c_client *client; + struct mutex lock; + + /* regmap fields */ + struct regmap *regmap; + struct regmap_field *reg_prx_int_hi; + struct regmap_field *reg_prx_int_lo; + struct regmap_field *reg_prx_it; + + u16 regs[CM36672_REGS_NUM]; +}; + +static const struct reg_field cm36672_reg_field_prx_int_hi = + REG_FIELD(CM36672_ADDR_PRX_CONF, 8, 8); +static const struct reg_field cm36672_reg_field_prx_int_lo = + REG_FIELD(CM36672_ADDR_PRX_CONF, 9, 9); +static const struct reg_field cm36672_reg_field_prx_it = + REG_FIELD(CM36672_ADDR_PRX_CONF, 1, 3); + +#ifdef CONFIG_OF +static void cm36672_mod_u16(u16 *reg, u16 mask, u8 shift, u16 val) +{ + *reg &= ~mask; + *reg |= (u16)(val << shift); +} + +static void cm36672_parse_dt(struct cm36672_chip *chip) +{ + struct device_node *dn = chip->client->dev.of_node; + u32 temp_val; + + if (!of_property_read_u32(dn, "cm36672,prx_led_current", + &temp_val)) + cm36672_mod_u16(&chip->regs[CM36672_ADDR_PRX_CONF3], + CM36672_PRX_LED_I_MASK, + CM36672_PRX_LED_I_SHIFT, + (u16)temp_val); + + if (!of_property_read_u32(dn, "cm36672,prx_hd", &temp_val)) + cm36672_mod_u16(&chip->regs[CM36672_ADDR_PRX_CONF], + CM36672_PRX_HD, CM36672_PRX_HD_SHIFT, + (u16)temp_val); +} +#endif + +#ifdef CONFIG_ACPI +/** + * cm36672_acpi_get_cpm_info() - Get CPM object from ACPI + * @client: pointer of struct i2c_client. + * @obj_name: pointer of ACPI object name. + * @count: maximum size of return array. + * @vals: pointer of array for return elements. + * + * Convert ACPI CPM table to array. Special thanks to Srinivas Pandruvada's + * help to implement this routine. + * + * Return: -ENODEV for fail. Otherwise the number of elements. + */ +static int cm36672_acpi_get_cpm_info(struct i2c_client *client, char *obj_name, + int count, u64 *vals) +{ + acpi_handle handle; + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + int i; + acpi_status status; + union acpi_object *cpm; + + handle = ACPI_HANDLE(&client->dev); + if (!handle) + return -ENODEV; + + status = acpi_evaluate_object(handle, obj_name, NULL, &buffer); + if (ACPI_FAILURE(status)) { + dev_err(&client->dev, "object %s not found\n", obj_name); + return -ENODEV; + } + + cpm = buffer.pointer; + for (i = 0; i < cpm->package.count && i < count; ++i) { + union acpi_object *elem; + + elem = &(cpm->package.elements[i]); + vals[i] = elem->integer.value; + } + + kfree(buffer.pointer); + + return i; +} + +static void cm36672_parse_acpi(struct cm36672_chip *chip) +{ + struct i2c_client *client = chip->client; + int cpm_elem_count, i; + u64 cpm_elems[20]; + + cpm_elem_count = cm36672_acpi_get_cpm_info(client, "CPM0", + ARRAY_SIZE(cpm_elems), cpm_elems); + + if (cpm_elem_count > 0) { + int header_num = 3; + int regs_bmp = cpm_elems[2]; + int reg_num = cpm_elem_count - header_num; + + if (reg_num > CM36672_REGS_NUM) + reg_num = CM36672_REGS_NUM; + for (i = 0; i < reg_num; i++) + if (regs_bmp & (1 << i)) + chip->regs[i] = cpm_elems[header_num + i]; + } +} + +#endif + +static int cm36672_regfield_init(struct cm36672_chip *chip) +{ + struct device *dev = &chip->client->dev; + struct regmap *regmap = chip->regmap; + + chip->reg_prx_int_lo = devm_regmap_field_alloc(dev, regmap, + cm36672_reg_field_prx_int_lo); + if (IS_ERR(chip->reg_prx_int_lo)) { + dev_err(dev, "%s: reg_prx_int_lo init failed\n", __func__); + return PTR_ERR(chip->reg_prx_int_lo); + } + + chip->reg_prx_int_hi = devm_regmap_field_alloc(dev, regmap, + cm36672_reg_field_prx_int_hi); + if (IS_ERR(chip->reg_prx_int_hi)) { + dev_err(dev, "%s: reg_prx_int_hi init failed\n", __func__); + return PTR_ERR(chip->reg_prx_int_hi); + } + + chip->reg_prx_it = devm_regmap_field_alloc(dev, regmap, + cm36672_reg_field_prx_it); + if (IS_ERR(chip->reg_prx_it)) { + dev_err(dev, "%s: reg_prx_it init failed\n", __func__); + return PTR_ERR(chip->reg_prx_it); + } + + return 0; +} + +/** + * cm36672_setup_reg() - Initialize sensor to default values. + * @chip: pointer of struct cm36672_chip + * + * Return: 0 for success; otherwise an error code. + */ +static int cm36672_setup_reg(struct cm36672_chip *chip) +{ + int i, reg, ret; + u16 prx_conf; + + memcpy((char *)&chip->regs, (char *)&cm36672_regs_default, + sizeof(cm36672_regs_default)); + +#ifdef CONFIG_OF + if (chip->client->dev.of_node) + cm36672_parse_dt(chip); +#endif + +#ifdef CONFIG_ACPI + if (ACPI_HANDLE(&chip->client->dev)) + cm36672_parse_acpi(chip); +#endif + + /* Store regs[CM36672_ADDR_PRX_CONF] */ + prx_conf = chip->regs[CM36672_ADDR_PRX_CONF]; + + /* Disable INT when initialize registers */ + chip->regs[CM36672_ADDR_PRX_CONF] &= ~CM36672_PRX_INT_THDH; + chip->regs[CM36672_ADDR_PRX_CONF] &= ~CM36672_PRX_INT_THDL; + + for (i = 0; i < CM36672_REGS_NUM; i++) { + ret = regmap_write(chip->regmap, i, chip->regs[i]); + if (ret < 0) + return ret; + } + + /* Restore regs[CM36672_ADDR_PRX_CONF] */ + chip->regs[CM36672_ADDR_PRX_CONF] = prx_conf; + + /* Force to clear flags */ + ret = regmap_read(chip->regmap, CM36672_ADDR_STATUS, ®); + if (ret < 0) { + dev_err(&chip->client->dev, + "%s: Failed to read Status register, err= %d\n", + __func__, ret); + return ret; + } + + return 0; +} + +/** + * cm36672_irq_handler() - Interrupt handling routine. + * @irq: irq number + * @private: pointer of void + * + * Return: IRQ_HANDLED. + */ +static irqreturn_t cm36672_irq_handler(int irq, void *private) +{ + struct iio_dev *indio_dev = private; + struct cm36672_chip *chip = iio_priv(indio_dev); + s64 timestamp = iio_get_time_ns(); + int ret, status; + + ret = regmap_read(chip->regmap, CM36672_ADDR_STATUS, &status); + if (ret < 0) + return IRQ_HANDLED; + + if (status & CM36672_INT_PRX_CLOSE) + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_RISING), + timestamp); + + if (status & CM36672_INT_PRX_AWAY) + iio_push_event(indio_dev, + IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0, + IIO_EV_TYPE_THRESH, + IIO_EV_DIR_FALLING), + timestamp); + + return IRQ_HANDLED; +} + +/** + * cm36672_read_prx_it() - Get the current proximity integration time. + * @chip: point of struct cm36672_chip + * @val: point of the integer part of integration time + * @val2: point of the micro part of integration time + * + * Return: IIO_VAL_INT_PLUS_MICRO for success; otherwise an error code. + */ +static int cm36672_read_prx_it(struct cm36672_chip *chip, int *val, int *val2) +{ + int ret, index; + + ret = regmap_field_read(chip->reg_prx_it, &index); + if (ret < 0) + return ret; + + if (index < 0 || index >= ARRAY_SIZE(cm36672_prx_it_scales)) + return -EINVAL; + + *val = cm36672_prx_it_scales[index].val; + *val2 = cm36672_prx_it_scales[index].val2; + + return IIO_VAL_INT_PLUS_MICRO; +} + +/** + * cm36672_write_prx_it() - Set the proximity integration time. + * @chip: point of struct cm36672_chip + * @val: the integer part of integration time + * @val2: the micro part of integration time + * + * Return: 0 for success; otherwise an error code. + */ +static int cm36672_write_prx_it(struct cm36672_chip *chip, int val, int val2) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(cm36672_prx_it_scales); i++) + if (val == cm36672_prx_it_scales[i].val && + val2 == cm36672_prx_it_scales[i].val2) + return regmap_field_write(chip->reg_prx_it, i); + + return -EINVAL; +} + +/** + * cm36672_prx_read() - Read from proximity sensor. + * @indio_dev: point of struct iio_dev + * @chan: point of struct iio_chan_spec + * @val: point of integer + * @val2: point of integer + * @mask: iio_chan_info_enum + * + * Return: IIO_VAL type for success; otherwise an error code. + */ +static int cm36672_prx_read(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct cm36672_chip *chip = iio_priv(indio_dev); + int ret; + + if (chan->type != IIO_PROXIMITY) + return -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + return cm36672_read_prx_it(chip, val, val2); + case IIO_CHAN_INFO_RAW: + ret = regmap_read(chip->regmap, CM36672_ADDR_PRX, val); + if (ret < 0) + return ret; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +/** + * cm36672_prx_write() - Write to proximity sensor. + * @indio_dev: point of struct iio_dev + * @chan: point of struct iio_chan_spec + * @val: integer for integer part + * @val2: integer for micro part + * @mask: iio_chan_info_enum + * + * Return: Equal or great than 0 for success; otherwise an error code. + */ +static int cm36672_prx_write(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int val, int val2, long mask) +{ + struct cm36672_chip *chip = iio_priv(indio_dev); + + switch (mask) { + case IIO_CHAN_INFO_INT_TIME: + return cm36672_write_prx_it(chip, val, val2); + default: + return -EINVAL; + } +} + +static int cm36672_read_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int *val, int *val2) +{ + struct cm36672_chip *chip = iio_priv(indio_dev); + int ret = -EINVAL; + + if (info != IIO_EV_INFO_VALUE) + return -EINVAL; + + if (chan->type == IIO_PROXIMITY) { + *val2 = 0; + if (dir == IIO_EV_DIR_RISING) + ret = regmap_read(chip->regmap, CM36672_ADDR_PRX_THDH, + val); + else if (dir == IIO_EV_DIR_FALLING) + ret = regmap_read(chip->regmap, CM36672_ADDR_PRX_THDL, + val); + } + + if (ret < 0) + return ret; + + return IIO_VAL_INT; +} + +static int cm36672_write_event(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + enum iio_event_info info, + int val, int val2) +{ + int reg, ret = 0; + int value, max; + struct cm36672_chip *chip = iio_priv(indio_dev); + + if (info != IIO_EV_INFO_VALUE) + return -EINVAL; + + if (chan->type == IIO_PROXIMITY) { + ret = regmap_read(chip->regmap, CM36672_ADDR_PRX_CONF, &value); + max = (value & CM36672_PRX_HD) ? 65535:4095; + if (val < 0 || val > max) + return -EINVAL; + if (dir == IIO_EV_DIR_RISING) + reg = CM36672_ADDR_PRX_THDH; + else if (dir == IIO_EV_DIR_FALLING) + reg = CM36672_ADDR_PRX_THDL; + else + return -EINVAL; + + ret = regmap_write(chip->regmap, reg, val); + if (ret < 0) + return ret; + } else + return -EINVAL; + + return 0; +} + +static int cm36672_read_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir) +{ + struct cm36672_chip *chip = iio_priv(indio_dev); + int ret, state; + + if (chan->type == IIO_PROXIMITY) { + if (dir == IIO_EV_DIR_RISING) + ret = regmap_field_read(chip->reg_prx_int_hi, &state); + else if (dir == IIO_EV_DIR_FALLING) + ret = regmap_field_read(chip->reg_prx_int_lo, &state); + else + return -EINVAL; + + if (ret) + return ret; + + return state; + } + + return -EINVAL; +} + +static int cm36672_write_event_config(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, + enum iio_event_type type, + enum iio_event_direction dir, + int state) +{ + struct cm36672_chip *chip = iio_priv(indio_dev); + int ret; + + if (chan->type == IIO_PROXIMITY) { + if (dir == IIO_EV_DIR_RISING) + ret = regmap_field_write(chip->reg_prx_int_hi, state); + else if (dir == IIO_EV_DIR_FALLING) + ret = regmap_field_write(chip->reg_prx_int_lo, state); + else + return -EINVAL; + + if (ret) + return ret; + + return 0; + } + + return -EINVAL; +} + +static const struct iio_event_spec cm36672_prx_event_spec[] = { + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_RISING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, + { + .type = IIO_EV_TYPE_THRESH, + .dir = IIO_EV_DIR_FALLING, + .mask_separate = BIT(IIO_EV_INFO_VALUE) | + BIT(IIO_EV_INFO_ENABLE), + }, +}; + +static const struct iio_chan_spec cm36672_channels[] = { + { + .type = IIO_PROXIMITY, + .info_mask_separate = + BIT(IIO_CHAN_INFO_RAW), + BIT(IIO_CHAN_INFO_INT_TIME), + .channel = 0, + .indexed = 0, + .scan_index = -1, + .event_spec = cm36672_prx_event_spec, + .num_event_specs = ARRAY_SIZE(cm36672_prx_event_spec), + }, +}; + +static bool cm36672_is_writeable_reg(struct device *dev, unsigned int reg) +{ + if (reg <= CM36672_ADDR_PRX_THDH) + return true; + return false; +} + +static IIO_CONST_ATTR(in_proximity_integration_time_available, + CM36672_PRX_INT_TIME_AVAIL); + +static struct attribute *cm36672_attributes[] = { + &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, + NULL, +}; + +static const struct attribute_group cm36672_attribute_group = { + .attrs = cm36672_attributes +}; + +static const struct iio_info cm36672_info = { + .driver_module = THIS_MODULE, + .read_raw = &cm36672_prx_read, + .write_raw = &cm36672_prx_write, + .attrs = &cm36672_attribute_group, + .read_event_value = cm36672_read_event, + .write_event_value = cm36672_write_event, + .read_event_config = cm36672_read_event_config, + .write_event_config = cm36672_write_event_config, +}; + +static const struct iio_info cm36672_info_no_irq = { + .driver_module = THIS_MODULE, + .read_raw = &cm36672_prx_read, + .write_raw = &cm36672_prx_write, + .attrs = &cm36672_attribute_group, +}; + +static const struct regmap_config cm36672_regmap_config = { + .name = CM36672_REGMAP_NAME, + .reg_bits = 8, + .val_bits = 16, + .writeable_reg = cm36672_is_writeable_reg, + .use_single_rw = true, + .val_format_endian = REGMAP_ENDIAN_LITTLE, +}; + +static int cm36672_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct cm36672_chip *chip; + struct iio_dev *indio_dev; + struct regmap *regmap; + int ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); + if (!indio_dev) + return -ENOMEM; + + regmap = devm_regmap_init_i2c(client, &cm36672_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&client->dev, "%s: regmap initialize failed\n", + __func__); + return PTR_ERR(regmap); + } + + chip = iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + chip->client = client; + chip->regmap = regmap; + + mutex_init(&chip->lock); + indio_dev->dev.parent = &client->dev; + indio_dev->channels = cm36672_channels; + indio_dev->num_channels = ARRAY_SIZE(cm36672_channels); + indio_dev->name = CM36672_DRIVER_NAME; + indio_dev->modes = INDIO_DIRECT_MODE; + + ret = cm36672_regfield_init(chip); + if (ret) { + dev_err(&client->dev, "%s: regfield init failed\n", __func__); + return ret; + } + + ret = cm36672_setup_reg(chip); + if (ret) { + dev_err(&client->dev, "%s: register setup failed\n", __func__); + return ret; + } + + if (client->irq) { + indio_dev->info = &cm36672_info; + + ret = request_threaded_irq(client->irq, NULL, + cm36672_irq_handler, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + "cm36672", indio_dev); + if (ret) { + dev_err(&client->dev, + "%s: request irq failed\n", + __func__); + return ret; + } + + /* Enable interrupt if default request*/ + if (chip->regs[CM36672_ADDR_PRX_CONF] & CM36672_PRX_INT_MASK) { + ret = regmap_write(chip->regmap, CM36672_ADDR_PRX_CONF, + chip->regs[CM36672_ADDR_PRX_CONF]); + if (ret) { + dev_err(&client->dev, + "%s: enable interrupt failed\n", + __func__); + return ret; + } + } + } else + indio_dev->info = &cm36672_info_no_irq; + + ret = iio_device_register(indio_dev); + if (ret) { + dev_err(&client->dev, + "%s: registering device failed\n", + __func__); + if (client->irq) + free_irq(client->irq, indio_dev); + } + + return 0; +} + +static int cm36672_remove(struct i2c_client *client) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(client); + struct cm36672_chip *chip = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + regmap_update_bits(chip->regmap, CM36672_ADDR_PRX_CONF, 1, 1); + if (client->irq) + free_irq(client->irq, indio_dev); + + return 0; +} + +static const struct i2c_device_id cm36672_id[] = { + { "cm36672", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, cm36672_id); + +static const struct of_device_id cm36672_of_match[] = { + { .compatible = "capella,cm36672" }, + { } +}; + +#ifdef CONFIG_ACPI +static const struct acpi_device_id cm36672_acpi_match[] = { + { "CPLM6672", 0}, + {}, +}; + +MODULE_DEVICE_TABLE(acpi, cm36672_acpi_match); +#endif + +#ifdef CONFIG_PM_SLEEP +static int cm36672_suspend(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct cm36672_chip *chip = iio_priv(indio_dev); + struct i2c_client *client = chip->client; + int i, ret; + + for (i = 0; i < CM36672_REGS_NUM; i++) { + ret = i2c_smbus_read_word_data(client, i); + if (ret < 0) + return ret; + chip->regs[i] = ret; + } + + return regmap_update_bits(chip->regmap, CM36672_ADDR_PRX_CONF, 1, 1); +} + +static int cm36672_resume(struct device *dev) +{ + struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); + struct cm36672_chip *chip = iio_priv(indio_dev); + struct i2c_client *client = chip->client; + int i, ret; + + for (i = 0; i < CM36672_REGS_NUM; i++) { + ret = i2c_smbus_write_word_data(client, i, chip->regs[i]); + if (ret < 0) + return ret; + } + + return regmap_update_bits(chip->regmap, CM36672_ADDR_PRX_CONF, 1, 0); +} + +static const struct dev_pm_ops cm36672_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(cm36672_suspend, cm36672_resume)}; +#endif + +static struct i2c_driver cm36672_driver = { + .driver = { + .name = CM36672_DRIVER_NAME, + .owner = THIS_MODULE, + .of_match_table = cm36672_of_match, +#ifdef CONFIG_ACPI + .acpi_match_table = ACPI_PTR(cm36672_acpi_match), +#endif +#ifdef CONFIG_PM_SLEEP + .pm = &cm36672_pm_ops, +#endif + }, + .id_table = cm36672_id, + .probe = cm36672_probe, + .remove = cm36672_remove, +}; + +module_i2c_driver(cm36672_driver); + +MODULE_AUTHOR("Kevin Tsai <capellamicro@xxxxxxxxx>"); +MODULE_DESCRIPTION("CM36672 proximity sensor driver"); +MODULE_LICENSE("GPL v2"); -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html