| /** |
| * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor |
| * |
| * Copyright (c) 2015, Intel Corporation. |
| * |
| * This file is subject to the terms and conditions of version 2 of |
| * the GNU General Public License. See the file COPYING in the main |
| * directory of this archive for more details. |
| * |
| * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48. |
| */ |
| |
| #include <linux/acpi.h> |
| #include <linux/i2c.h> |
| #include <linux/interrupt.h> |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/regmap.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/iio/events.h> |
| #include <linux/iio/iio.h> |
| #include <linux/iio/sysfs.h> |
| |
| #define STK3310_REG_STATE 0x00 |
| #define STK3310_REG_PSCTRL 0x01 |
| #define STK3310_REG_ALSCTRL 0x02 |
| #define STK3310_REG_INT 0x04 |
| #define STK3310_REG_THDH_PS 0x06 |
| #define STK3310_REG_THDL_PS 0x08 |
| #define STK3310_REG_FLAG 0x10 |
| #define STK3310_REG_PS_DATA_MSB 0x11 |
| #define STK3310_REG_PS_DATA_LSB 0x12 |
| #define STK3310_REG_ALS_DATA_MSB 0x13 |
| #define STK3310_REG_ALS_DATA_LSB 0x14 |
| #define STK3310_REG_ID 0x3E |
| #define STK3310_MAX_REG 0x80 |
| |
| #define STK3310_STATE_EN_PS 0x01 |
| #define STK3310_STATE_EN_ALS 0x02 |
| #define STK3310_STATE_STANDBY 0x00 |
| |
| #define STK3310_CHIP_ID_VAL 0x13 |
| #define STK3311_CHIP_ID_VAL 0x1D |
| #define STK3310_PSINT_EN 0x01 |
| #define STK3310_PS_MAX_VAL 0xFFFF |
| #define STK3310_THRESH_MAX 0xFFFF |
| |
| #define STK3310_DRIVER_NAME "stk3310" |
| #define STK3310_REGMAP_NAME "stk3310_regmap" |
| #define STK3310_EVENT "stk3310_event" |
| #define STK3310_GPIO "stk3310_gpio" |
| |
| #define STK3310_SCALE_AVAILABLE "6.4 1.6 0.4 0.1" |
| |
| #define STK3310_IT_AVAILABLE \ |
| "0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \ |
| "0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \ |
| "3.031040 6.062080" |
| |
| #define STK3310_REGFIELD(name) \ |
| do { \ |
| data->reg_##name = \ |
| devm_regmap_field_alloc(&client->dev, regmap, \ |
| stk3310_reg_field_##name); \ |
| if (IS_ERR(data->reg_##name)) { \ |
| dev_err(&client->dev, "reg field alloc failed.\n"); \ |
| return PTR_ERR(data->reg_##name); \ |
| } \ |
| } while (0) |
| |
| static const struct reg_field stk3310_reg_field_state = |
| REG_FIELD(STK3310_REG_STATE, 0, 2); |
| static const struct reg_field stk3310_reg_field_als_gain = |
| REG_FIELD(STK3310_REG_ALSCTRL, 4, 5); |
| static const struct reg_field stk3310_reg_field_ps_gain = |
| REG_FIELD(STK3310_REG_PSCTRL, 4, 5); |
| static const struct reg_field stk3310_reg_field_als_it = |
| REG_FIELD(STK3310_REG_ALSCTRL, 0, 3); |
| static const struct reg_field stk3310_reg_field_ps_it = |
| REG_FIELD(STK3310_REG_PSCTRL, 0, 3); |
| static const struct reg_field stk3310_reg_field_int_ps = |
| REG_FIELD(STK3310_REG_INT, 0, 2); |
| static const struct reg_field stk3310_reg_field_flag_psint = |
| REG_FIELD(STK3310_REG_FLAG, 4, 4); |
| static const struct reg_field stk3310_reg_field_flag_nf = |
| REG_FIELD(STK3310_REG_FLAG, 0, 0); |
| /* |
| * Maximum PS values with regard to scale. Used to export the 'inverse' |
| * PS value (high values for far objects, low values for near objects). |
| */ |
| static const int stk3310_ps_max[4] = { |
| STK3310_PS_MAX_VAL / 64, |
| STK3310_PS_MAX_VAL / 16, |
| STK3310_PS_MAX_VAL / 4, |
| STK3310_PS_MAX_VAL, |
| }; |
| |
| static const int stk3310_scale_table[][2] = { |
| {6, 400000}, {1, 600000}, {0, 400000}, {0, 100000} |
| }; |
| |
| /* Integration time in seconds, microseconds */ |
| static const int stk3310_it_table[][2] = { |
| {0, 185}, {0, 370}, {0, 741}, {0, 1480}, |
| {0, 2960}, {0, 5920}, {0, 11840}, {0, 23680}, |
| {0, 47360}, {0, 94720}, {0, 189440}, {0, 378880}, |
| {0, 757760}, {1, 515520}, {3, 31040}, {6, 62080}, |
| }; |
| |
| struct stk3310_data { |
| struct i2c_client *client; |
| struct mutex lock; |
| bool als_enabled; |
| bool ps_enabled; |
| u64 timestamp; |
| struct regmap *regmap; |
| struct regmap_field *reg_state; |
| struct regmap_field *reg_als_gain; |
| struct regmap_field *reg_ps_gain; |
| struct regmap_field *reg_als_it; |
| struct regmap_field *reg_ps_it; |
| struct regmap_field *reg_int_ps; |
| struct regmap_field *reg_flag_psint; |
| struct regmap_field *reg_flag_nf; |
| }; |
| |
| static const struct iio_event_spec stk3310_events[] = { |
| /* Proximity event */ |
| { |
| .type = IIO_EV_TYPE_THRESH, |
| .dir = IIO_EV_DIR_FALLING, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE), |
| }, |
| /* Out-of-proximity event */ |
| { |
| .type = IIO_EV_TYPE_THRESH, |
| .dir = IIO_EV_DIR_RISING, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE), |
| }, |
| }; |
| |
| static const struct iio_chan_spec stk3310_channels[] = { |
| { |
| .type = IIO_LIGHT, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE) | |
| BIT(IIO_CHAN_INFO_INT_TIME), |
| }, |
| { |
| .type = IIO_PROXIMITY, |
| .info_mask_separate = |
| BIT(IIO_CHAN_INFO_RAW) | |
| BIT(IIO_CHAN_INFO_SCALE) | |
| BIT(IIO_CHAN_INFO_INT_TIME), |
| .event_spec = stk3310_events, |
| .num_event_specs = ARRAY_SIZE(stk3310_events), |
| } |
| }; |
| |
| static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE); |
| |
| static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE); |
| |
| static IIO_CONST_ATTR(in_illuminance_integration_time_available, |
| STK3310_IT_AVAILABLE); |
| |
| static IIO_CONST_ATTR(in_proximity_integration_time_available, |
| STK3310_IT_AVAILABLE); |
| |
| static struct attribute *stk3310_attributes[] = { |
| &iio_const_attr_in_illuminance_scale_available.dev_attr.attr, |
| &iio_const_attr_in_proximity_scale_available.dev_attr.attr, |
| &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr, |
| &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group stk3310_attribute_group = { |
| .attrs = stk3310_attributes |
| }; |
| |
| static int stk3310_get_index(const int table[][2], int table_size, |
| int val, int val2) |
| { |
| int i; |
| |
| for (i = 0; i < table_size; i++) { |
| if (val == table[i][0] && val2 == table[i][1]) |
| return i; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int stk3310_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) |
| { |
| u8 reg; |
| u16 buf; |
| int ret; |
| unsigned int index; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| |
| if (info != IIO_EV_INFO_VALUE) |
| return -EINVAL; |
| |
| /* |
| * Only proximity interrupts are implemented at the moment. |
| * Since we're inverting proximity values, the sensor's 'high' |
| * threshold will become our 'low' threshold, associated with |
| * 'near' events. Similarly, the sensor's 'low' threshold will |
| * be our 'high' threshold, associated with 'far' events. |
| */ |
| if (dir == IIO_EV_DIR_RISING) |
| reg = STK3310_REG_THDL_PS; |
| else if (dir == IIO_EV_DIR_FALLING) |
| reg = STK3310_REG_THDH_PS; |
| else |
| return -EINVAL; |
| |
| mutex_lock(&data->lock); |
| ret = regmap_bulk_read(data->regmap, reg, &buf, 2); |
| mutex_unlock(&data->lock); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "register read failed\n"); |
| return ret; |
| } |
| regmap_field_read(data->reg_ps_gain, &index); |
| *val = swab16(stk3310_ps_max[index] - buf); |
| |
| return IIO_VAL_INT; |
| } |
| |
| static int stk3310_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) |
| { |
| u8 reg; |
| u16 buf; |
| int ret; |
| unsigned int index; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| struct i2c_client *client = data->client; |
| |
| regmap_field_read(data->reg_ps_gain, &index); |
| if (val > stk3310_ps_max[index]) |
| return -EINVAL; |
| |
| if (dir == IIO_EV_DIR_RISING) |
| reg = STK3310_REG_THDL_PS; |
| else if (dir == IIO_EV_DIR_FALLING) |
| reg = STK3310_REG_THDH_PS; |
| else |
| return -EINVAL; |
| |
| buf = swab16(stk3310_ps_max[index] - val); |
| ret = regmap_bulk_write(data->regmap, reg, &buf, 2); |
| if (ret < 0) |
| dev_err(&client->dev, "failed to set PS threshold!\n"); |
| |
| return ret; |
| } |
| |
| static int stk3310_read_event_config(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir) |
| { |
| unsigned int event_val; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| |
| regmap_field_read(data->reg_int_ps, &event_val); |
| |
| return event_val; |
| } |
| |
| static int stk3310_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) |
| { |
| int ret; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| struct i2c_client *client = data->client; |
| |
| if (state < 0 || state > 7) |
| return -EINVAL; |
| |
| /* Set INT_PS value */ |
| mutex_lock(&data->lock); |
| ret = regmap_field_write(data->reg_int_ps, state); |
| if (ret < 0) |
| dev_err(&client->dev, "failed to set interrupt mode\n"); |
| mutex_unlock(&data->lock); |
| |
| return ret; |
| } |
| |
| static int stk3310_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| int *val, int *val2, long mask) |
| { |
| u8 reg; |
| u16 buf; |
| int ret; |
| unsigned int index; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| struct i2c_client *client = data->client; |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_RAW: |
| if (chan->type == IIO_LIGHT) |
| reg = STK3310_REG_ALS_DATA_MSB; |
| else if (chan->type == IIO_PROXIMITY) |
| reg = STK3310_REG_PS_DATA_MSB; |
| else |
| return -EINVAL; |
| mutex_lock(&data->lock); |
| ret = regmap_bulk_read(data->regmap, reg, &buf, 2); |
| if (ret < 0) { |
| dev_err(&client->dev, "register read failed\n"); |
| mutex_unlock(&data->lock); |
| return ret; |
| } |
| *val = swab16(buf); |
| if (chan->type == IIO_PROXIMITY) { |
| /* |
| * Invert the proximity data so we return low values |
| * for close objects and high values for far ones. |
| */ |
| regmap_field_read(data->reg_ps_gain, &index); |
| *val = stk3310_ps_max[index] - *val; |
| } |
| mutex_unlock(&data->lock); |
| return IIO_VAL_INT; |
| case IIO_CHAN_INFO_INT_TIME: |
| if (chan->type == IIO_LIGHT) |
| regmap_field_read(data->reg_als_it, &index); |
| else |
| regmap_field_read(data->reg_ps_it, &index); |
| *val = stk3310_it_table[index][0]; |
| *val2 = stk3310_it_table[index][1]; |
| return IIO_VAL_INT_PLUS_MICRO; |
| case IIO_CHAN_INFO_SCALE: |
| if (chan->type == IIO_LIGHT) |
| regmap_field_read(data->reg_als_gain, &index); |
| else |
| regmap_field_read(data->reg_ps_gain, &index); |
| *val = stk3310_scale_table[index][0]; |
| *val2 = stk3310_scale_table[index][1]; |
| return IIO_VAL_INT_PLUS_MICRO; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static int stk3310_write_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, |
| int val, int val2, long mask) |
| { |
| int ret; |
| int index; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_INT_TIME: |
| index = stk3310_get_index(stk3310_it_table, |
| ARRAY_SIZE(stk3310_it_table), |
| val, val2); |
| if (index < 0) |
| return -EINVAL; |
| mutex_lock(&data->lock); |
| if (chan->type == IIO_LIGHT) |
| ret = regmap_field_write(data->reg_als_it, index); |
| else |
| ret = regmap_field_write(data->reg_ps_it, index); |
| if (ret < 0) |
| dev_err(&data->client->dev, |
| "sensor configuration failed\n"); |
| mutex_unlock(&data->lock); |
| return ret; |
| |
| case IIO_CHAN_INFO_SCALE: |
| index = stk3310_get_index(stk3310_scale_table, |
| ARRAY_SIZE(stk3310_scale_table), |
| val, val2); |
| if (index < 0) |
| return -EINVAL; |
| mutex_lock(&data->lock); |
| if (chan->type == IIO_LIGHT) |
| ret = regmap_field_write(data->reg_als_gain, index); |
| else |
| ret = regmap_field_write(data->reg_ps_gain, index); |
| if (ret < 0) |
| dev_err(&data->client->dev, |
| "sensor configuration failed\n"); |
| mutex_unlock(&data->lock); |
| return ret; |
| } |
| |
| return -EINVAL; |
| } |
| |
| static const struct iio_info stk3310_info = { |
| .driver_module = THIS_MODULE, |
| .read_raw = stk3310_read_raw, |
| .write_raw = stk3310_write_raw, |
| .attrs = &stk3310_attribute_group, |
| .read_event_value = stk3310_read_event, |
| .write_event_value = stk3310_write_event, |
| .read_event_config = stk3310_read_event_config, |
| .write_event_config = stk3310_write_event_config, |
| }; |
| |
| static int stk3310_set_state(struct stk3310_data *data, u8 state) |
| { |
| int ret; |
| struct i2c_client *client = data->client; |
| |
| /* 3-bit state; 0b100 is not supported. */ |
| if (state > 7 || state == 4) |
| return -EINVAL; |
| |
| mutex_lock(&data->lock); |
| ret = regmap_field_write(data->reg_state, state); |
| if (ret < 0) { |
| dev_err(&client->dev, "failed to change sensor state\n"); |
| } else if (state != STK3310_STATE_STANDBY) { |
| /* Don't reset the 'enabled' flags if we're going in standby */ |
| data->ps_enabled = !!(state & 0x01); |
| data->als_enabled = !!(state & 0x02); |
| } |
| mutex_unlock(&data->lock); |
| |
| return ret; |
| } |
| |
| static int stk3310_init(struct iio_dev *indio_dev) |
| { |
| int ret; |
| int chipid; |
| u8 state; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| struct i2c_client *client = data->client; |
| |
| regmap_read(data->regmap, STK3310_REG_ID, &chipid); |
| if (chipid != STK3310_CHIP_ID_VAL && |
| chipid != STK3311_CHIP_ID_VAL) { |
| dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid); |
| return -ENODEV; |
| } |
| |
| state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS; |
| ret = stk3310_set_state(data, state); |
| if (ret < 0) { |
| dev_err(&client->dev, "failed to enable sensor"); |
| return ret; |
| } |
| |
| /* Enable PS interrupts */ |
| ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN); |
| if (ret < 0) |
| dev_err(&client->dev, "failed to enable interrupts!\n"); |
| |
| return ret; |
| } |
| |
| static int stk3310_gpio_probe(struct i2c_client *client) |
| { |
| struct device *dev; |
| struct gpio_desc *gpio; |
| int ret; |
| |
| if (!client) |
| return -EINVAL; |
| |
| dev = &client->dev; |
| |
| /* gpio interrupt pin */ |
| gpio = devm_gpiod_get_index(dev, STK3310_GPIO, 0); |
| if (IS_ERR(gpio)) { |
| dev_err(dev, "acpi gpio get index failed\n"); |
| return PTR_ERR(gpio); |
| } |
| |
| ret = gpiod_direction_input(gpio); |
| if (ret) |
| return ret; |
| |
| ret = gpiod_to_irq(gpio); |
| dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); |
| |
| return ret; |
| } |
| |
| static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg) |
| { |
| switch (reg) { |
| case STK3310_REG_ALS_DATA_MSB: |
| case STK3310_REG_ALS_DATA_LSB: |
| case STK3310_REG_PS_DATA_LSB: |
| case STK3310_REG_PS_DATA_MSB: |
| case STK3310_REG_FLAG: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| static struct regmap_config stk3310_regmap_config = { |
| .name = STK3310_REGMAP_NAME, |
| .reg_bits = 8, |
| .val_bits = 8, |
| .max_register = STK3310_MAX_REG, |
| .cache_type = REGCACHE_RBTREE, |
| .volatile_reg = stk3310_is_volatile_reg, |
| }; |
| |
| static int stk3310_regmap_init(struct stk3310_data *data) |
| { |
| struct regmap *regmap; |
| struct i2c_client *client; |
| |
| client = data->client; |
| regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config); |
| if (IS_ERR(regmap)) { |
| dev_err(&client->dev, "regmap initialization failed.\n"); |
| return PTR_ERR(regmap); |
| } |
| data->regmap = regmap; |
| |
| STK3310_REGFIELD(state); |
| STK3310_REGFIELD(als_gain); |
| STK3310_REGFIELD(ps_gain); |
| STK3310_REGFIELD(als_it); |
| STK3310_REGFIELD(ps_it); |
| STK3310_REGFIELD(int_ps); |
| STK3310_REGFIELD(flag_psint); |
| STK3310_REGFIELD(flag_nf); |
| |
| return 0; |
| } |
| |
| static irqreturn_t stk3310_irq_handler(int irq, void *private) |
| { |
| struct iio_dev *indio_dev = private; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| |
| data->timestamp = iio_get_time_ns(); |
| |
| return IRQ_WAKE_THREAD; |
| } |
| |
| static irqreturn_t stk3310_irq_event_handler(int irq, void *private) |
| { |
| int ret; |
| unsigned int dir; |
| u64 event; |
| |
| struct iio_dev *indio_dev = private; |
| struct stk3310_data *data = iio_priv(indio_dev); |
| |
| /* Read FLAG_NF to figure out what threshold has been met. */ |
| mutex_lock(&data->lock); |
| ret = regmap_field_read(data->reg_flag_nf, &dir); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "register read failed\n"); |
| mutex_unlock(&data->lock); |
| return ret; |
| } |
| event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1, |
| IIO_EV_TYPE_THRESH, |
| (dir ? IIO_EV_DIR_RISING : |
| IIO_EV_DIR_FALLING)); |
| iio_push_event(indio_dev, event, data->timestamp); |
| |
| /* Reset the interrupt flag */ |
| ret = regmap_field_write(data->reg_flag_psint, 0); |
| if (ret < 0) |
| dev_err(&data->client->dev, "failed to reset interrupts\n"); |
| mutex_unlock(&data->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int stk3310_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| int ret; |
| struct iio_dev *indio_dev; |
| struct stk3310_data *data; |
| |
| indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| if (!indio_dev) { |
| dev_err(&client->dev, "iio allocation failed!\n"); |
| return -ENOMEM; |
| } |
| |
| data = iio_priv(indio_dev); |
| data->client = client; |
| i2c_set_clientdata(client, indio_dev); |
| mutex_init(&data->lock); |
| |
| ret = stk3310_regmap_init(data); |
| if (ret < 0) |
| return ret; |
| |
| indio_dev->dev.parent = &client->dev; |
| indio_dev->info = &stk3310_info; |
| indio_dev->name = STK3310_DRIVER_NAME; |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| indio_dev->channels = stk3310_channels; |
| indio_dev->num_channels = ARRAY_SIZE(stk3310_channels); |
| |
| ret = stk3310_init(indio_dev); |
| if (ret < 0) |
| return ret; |
| |
| ret = iio_device_register(indio_dev); |
| if (ret < 0) { |
| dev_err(&client->dev, "device_register failed\n"); |
| stk3310_set_state(data, STK3310_STATE_STANDBY); |
| } |
| |
| if (client->irq <= 0) |
| client->irq = stk3310_gpio_probe(client); |
| |
| if (client->irq >= 0) { |
| ret = devm_request_threaded_irq(&client->dev, client->irq, |
| stk3310_irq_handler, |
| stk3310_irq_event_handler, |
| IRQF_TRIGGER_FALLING | |
| IRQF_ONESHOT, |
| STK3310_EVENT, indio_dev); |
| if (ret < 0) |
| dev_err(&client->dev, "request irq %d failed\n", |
| client->irq); |
| } |
| |
| return ret; |
| } |
| |
| static int stk3310_remove(struct i2c_client *client) |
| { |
| struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| |
| iio_device_unregister(indio_dev); |
| return stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY); |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int stk3310_suspend(struct device *dev) |
| { |
| struct stk3310_data *data; |
| |
| data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); |
| |
| return stk3310_set_state(data, STK3310_STATE_STANDBY); |
| } |
| |
| static int stk3310_resume(struct device *dev) |
| { |
| int state = 0; |
| struct stk3310_data *data; |
| |
| data = iio_priv(i2c_get_clientdata(to_i2c_client(dev))); |
| if (data->ps_enabled) |
| state |= STK3310_STATE_EN_PS; |
| if (data->als_enabled) |
| state |= STK3310_STATE_EN_ALS; |
| |
| return stk3310_set_state(data, state); |
| } |
| |
| static SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, stk3310_resume); |
| |
| #define STK3310_PM_OPS (&stk3310_pm_ops) |
| #else |
| #define STK3310_PM_OPS NULL |
| #endif |
| |
| static const struct i2c_device_id stk3310_i2c_id[] = { |
| {"STK3310", 0}, |
| {"STK3311", 0}, |
| {} |
| }; |
| |
| static const struct acpi_device_id stk3310_acpi_id[] = { |
| {"STK3310", 0}, |
| {"STK3311", 0}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id); |
| |
| static struct i2c_driver stk3310_driver = { |
| .driver = { |
| .name = "stk3310", |
| .pm = STK3310_PM_OPS, |
| .acpi_match_table = ACPI_PTR(stk3310_acpi_id), |
| }, |
| .probe = stk3310_probe, |
| .remove = stk3310_remove, |
| .id_table = stk3310_i2c_id, |
| }; |
| |
| module_i2c_driver(stk3310_driver); |
| |
| MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>"); |
| MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver"); |
| MODULE_LICENSE("GPL v2"); |