| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * DRV260X haptics driver family |
| * |
| * Author: Dan Murphy <dmurphy@ti.com> |
| * |
| * Copyright: (C) 2014 Texas Instruments, Inc. |
| */ |
| |
| #include <linux/i2c.h> |
| #include <linux/input.h> |
| #include <linux/module.h> |
| #include <linux/regmap.h> |
| #include <linux/slab.h> |
| #include <linux/delay.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/regulator/consumer.h> |
| |
| #include <dt-bindings/input/ti-drv260x.h> |
| |
| #define DRV260X_STATUS 0x0 |
| #define DRV260X_MODE 0x1 |
| #define DRV260X_RT_PB_IN 0x2 |
| #define DRV260X_LIB_SEL 0x3 |
| #define DRV260X_WV_SEQ_1 0x4 |
| #define DRV260X_WV_SEQ_2 0x5 |
| #define DRV260X_WV_SEQ_3 0x6 |
| #define DRV260X_WV_SEQ_4 0x7 |
| #define DRV260X_WV_SEQ_5 0x8 |
| #define DRV260X_WV_SEQ_6 0x9 |
| #define DRV260X_WV_SEQ_7 0xa |
| #define DRV260X_WV_SEQ_8 0xb |
| #define DRV260X_GO 0xc |
| #define DRV260X_OVERDRIVE_OFF 0xd |
| #define DRV260X_SUSTAIN_P_OFF 0xe |
| #define DRV260X_SUSTAIN_N_OFF 0xf |
| #define DRV260X_BRAKE_OFF 0x10 |
| #define DRV260X_A_TO_V_CTRL 0x11 |
| #define DRV260X_A_TO_V_MIN_INPUT 0x12 |
| #define DRV260X_A_TO_V_MAX_INPUT 0x13 |
| #define DRV260X_A_TO_V_MIN_OUT 0x14 |
| #define DRV260X_A_TO_V_MAX_OUT 0x15 |
| #define DRV260X_RATED_VOLT 0x16 |
| #define DRV260X_OD_CLAMP_VOLT 0x17 |
| #define DRV260X_CAL_COMP 0x18 |
| #define DRV260X_CAL_BACK_EMF 0x19 |
| #define DRV260X_FEEDBACK_CTRL 0x1a |
| #define DRV260X_CTRL1 0x1b |
| #define DRV260X_CTRL2 0x1c |
| #define DRV260X_CTRL3 0x1d |
| #define DRV260X_CTRL4 0x1e |
| #define DRV260X_CTRL5 0x1f |
| #define DRV260X_LRA_LOOP_PERIOD 0x20 |
| #define DRV260X_VBAT_MON 0x21 |
| #define DRV260X_LRA_RES_PERIOD 0x22 |
| #define DRV260X_MAX_REG 0x23 |
| |
| #define DRV260X_GO_BIT 0x01 |
| |
| /* Library Selection */ |
| #define DRV260X_LIB_SEL_MASK 0x07 |
| #define DRV260X_LIB_SEL_RAM 0x0 |
| #define DRV260X_LIB_SEL_OD 0x1 |
| #define DRV260X_LIB_SEL_40_60 0x2 |
| #define DRV260X_LIB_SEL_60_80 0x3 |
| #define DRV260X_LIB_SEL_100_140 0x4 |
| #define DRV260X_LIB_SEL_140_PLUS 0x5 |
| |
| #define DRV260X_LIB_SEL_HIZ_MASK 0x10 |
| #define DRV260X_LIB_SEL_HIZ_EN 0x01 |
| #define DRV260X_LIB_SEL_HIZ_DIS 0 |
| |
| /* Mode register */ |
| #define DRV260X_STANDBY (1 << 6) |
| #define DRV260X_STANDBY_MASK 0x40 |
| #define DRV260X_INTERNAL_TRIGGER 0x00 |
| #define DRV260X_EXT_TRIGGER_EDGE 0x01 |
| #define DRV260X_EXT_TRIGGER_LEVEL 0x02 |
| #define DRV260X_PWM_ANALOG_IN 0x03 |
| #define DRV260X_AUDIOHAPTIC 0x04 |
| #define DRV260X_RT_PLAYBACK 0x05 |
| #define DRV260X_DIAGNOSTICS 0x06 |
| #define DRV260X_AUTO_CAL 0x07 |
| |
| /* Audio to Haptics Control */ |
| #define DRV260X_AUDIO_HAPTICS_PEAK_10MS (0 << 2) |
| #define DRV260X_AUDIO_HAPTICS_PEAK_20MS (1 << 2) |
| #define DRV260X_AUDIO_HAPTICS_PEAK_30MS (2 << 2) |
| #define DRV260X_AUDIO_HAPTICS_PEAK_40MS (3 << 2) |
| |
| #define DRV260X_AUDIO_HAPTICS_FILTER_100HZ 0x00 |
| #define DRV260X_AUDIO_HAPTICS_FILTER_125HZ 0x01 |
| #define DRV260X_AUDIO_HAPTICS_FILTER_150HZ 0x02 |
| #define DRV260X_AUDIO_HAPTICS_FILTER_200HZ 0x03 |
| |
| /* Min/Max Input/Output Voltages */ |
| #define DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT 0x19 |
| #define DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT 0x64 |
| #define DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT 0x19 |
| #define DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT 0xFF |
| |
| /* Feedback register */ |
| #define DRV260X_FB_REG_ERM_MODE 0x7f |
| #define DRV260X_FB_REG_LRA_MODE (1 << 7) |
| |
| #define DRV260X_BRAKE_FACTOR_MASK 0x1f |
| #define DRV260X_BRAKE_FACTOR_2X (1 << 0) |
| #define DRV260X_BRAKE_FACTOR_3X (2 << 4) |
| #define DRV260X_BRAKE_FACTOR_4X (3 << 4) |
| #define DRV260X_BRAKE_FACTOR_6X (4 << 4) |
| #define DRV260X_BRAKE_FACTOR_8X (5 << 4) |
| #define DRV260X_BRAKE_FACTOR_16 (6 << 4) |
| #define DRV260X_BRAKE_FACTOR_DIS (7 << 4) |
| |
| #define DRV260X_LOOP_GAIN_LOW 0xf3 |
| #define DRV260X_LOOP_GAIN_MED (1 << 2) |
| #define DRV260X_LOOP_GAIN_HIGH (2 << 2) |
| #define DRV260X_LOOP_GAIN_VERY_HIGH (3 << 2) |
| |
| #define DRV260X_BEMF_GAIN_0 0xfc |
| #define DRV260X_BEMF_GAIN_1 (1 << 0) |
| #define DRV260X_BEMF_GAIN_2 (2 << 0) |
| #define DRV260X_BEMF_GAIN_3 (3 << 0) |
| |
| /* Control 1 register */ |
| #define DRV260X_AC_CPLE_EN (1 << 5) |
| #define DRV260X_STARTUP_BOOST (1 << 7) |
| |
| /* Control 2 register */ |
| |
| #define DRV260X_IDISS_TIME_45 0 |
| #define DRV260X_IDISS_TIME_75 (1 << 0) |
| #define DRV260X_IDISS_TIME_150 (1 << 1) |
| #define DRV260X_IDISS_TIME_225 0x03 |
| |
| #define DRV260X_BLANK_TIME_45 (0 << 2) |
| #define DRV260X_BLANK_TIME_75 (1 << 2) |
| #define DRV260X_BLANK_TIME_150 (2 << 2) |
| #define DRV260X_BLANK_TIME_225 (3 << 2) |
| |
| #define DRV260X_SAMP_TIME_150 (0 << 4) |
| #define DRV260X_SAMP_TIME_200 (1 << 4) |
| #define DRV260X_SAMP_TIME_250 (2 << 4) |
| #define DRV260X_SAMP_TIME_300 (3 << 4) |
| |
| #define DRV260X_BRAKE_STABILIZER (1 << 6) |
| #define DRV260X_UNIDIR_IN (0 << 7) |
| #define DRV260X_BIDIR_IN (1 << 7) |
| |
| /* Control 3 Register */ |
| #define DRV260X_LRA_OPEN_LOOP (1 << 0) |
| #define DRV260X_ANANLOG_IN (1 << 1) |
| #define DRV260X_LRA_DRV_MODE (1 << 2) |
| #define DRV260X_RTP_UNSIGNED_DATA (1 << 3) |
| #define DRV260X_SUPPLY_COMP_DIS (1 << 4) |
| #define DRV260X_ERM_OPEN_LOOP (1 << 5) |
| #define DRV260X_NG_THRESH_0 (0 << 6) |
| #define DRV260X_NG_THRESH_2 (1 << 6) |
| #define DRV260X_NG_THRESH_4 (2 << 6) |
| #define DRV260X_NG_THRESH_8 (3 << 6) |
| |
| /* Control 4 Register */ |
| #define DRV260X_AUTOCAL_TIME_150MS (0 << 4) |
| #define DRV260X_AUTOCAL_TIME_250MS (1 << 4) |
| #define DRV260X_AUTOCAL_TIME_500MS (2 << 4) |
| #define DRV260X_AUTOCAL_TIME_1000MS (3 << 4) |
| |
| /** |
| * struct drv260x_data - |
| * @input_dev: Pointer to the input device |
| * @client: Pointer to the I2C client |
| * @regmap: Register map of the device |
| * @work: Work item used to off load the enable/disable of the vibration |
| * @enable_gpio: Pointer to the gpio used for enable/disabling |
| * @regulator: Pointer to the regulator for the IC |
| * @magnitude: Magnitude of the vibration event |
| * @mode: The operating mode of the IC (LRA_NO_CAL, ERM or LRA) |
| * @library: The vibration library to be used |
| * @rated_voltage: The rated_voltage of the actuator |
| * @overdrive_voltage: The over drive voltage of the actuator |
| **/ |
| struct drv260x_data { |
| struct input_dev *input_dev; |
| struct i2c_client *client; |
| struct regmap *regmap; |
| struct work_struct work; |
| struct gpio_desc *enable_gpio; |
| struct regulator *regulator; |
| u32 magnitude; |
| u32 mode; |
| u32 library; |
| int rated_voltage; |
| int overdrive_voltage; |
| }; |
| |
| static const struct reg_default drv260x_reg_defs[] = { |
| { DRV260X_STATUS, 0xe0 }, |
| { DRV260X_MODE, 0x40 }, |
| { DRV260X_RT_PB_IN, 0x00 }, |
| { DRV260X_LIB_SEL, 0x00 }, |
| { DRV260X_WV_SEQ_1, 0x01 }, |
| { DRV260X_WV_SEQ_2, 0x00 }, |
| { DRV260X_WV_SEQ_3, 0x00 }, |
| { DRV260X_WV_SEQ_4, 0x00 }, |
| { DRV260X_WV_SEQ_5, 0x00 }, |
| { DRV260X_WV_SEQ_6, 0x00 }, |
| { DRV260X_WV_SEQ_7, 0x00 }, |
| { DRV260X_WV_SEQ_8, 0x00 }, |
| { DRV260X_GO, 0x00 }, |
| { DRV260X_OVERDRIVE_OFF, 0x00 }, |
| { DRV260X_SUSTAIN_P_OFF, 0x00 }, |
| { DRV260X_SUSTAIN_N_OFF, 0x00 }, |
| { DRV260X_BRAKE_OFF, 0x00 }, |
| { DRV260X_A_TO_V_CTRL, 0x05 }, |
| { DRV260X_A_TO_V_MIN_INPUT, 0x19 }, |
| { DRV260X_A_TO_V_MAX_INPUT, 0xff }, |
| { DRV260X_A_TO_V_MIN_OUT, 0x19 }, |
| { DRV260X_A_TO_V_MAX_OUT, 0xff }, |
| { DRV260X_RATED_VOLT, 0x3e }, |
| { DRV260X_OD_CLAMP_VOLT, 0x8c }, |
| { DRV260X_CAL_COMP, 0x0c }, |
| { DRV260X_CAL_BACK_EMF, 0x6c }, |
| { DRV260X_FEEDBACK_CTRL, 0x36 }, |
| { DRV260X_CTRL1, 0x93 }, |
| { DRV260X_CTRL2, 0xfa }, |
| { DRV260X_CTRL3, 0xa0 }, |
| { DRV260X_CTRL4, 0x20 }, |
| { DRV260X_CTRL5, 0x80 }, |
| { DRV260X_LRA_LOOP_PERIOD, 0x33 }, |
| { DRV260X_VBAT_MON, 0x00 }, |
| { DRV260X_LRA_RES_PERIOD, 0x00 }, |
| }; |
| |
| #define DRV260X_DEF_RATED_VOLT 0x90 |
| #define DRV260X_DEF_OD_CLAMP_VOLT 0x90 |
| |
| /* |
| * Rated and Overdriver Voltages: |
| * Calculated using the formula r = v * 255 / 5.6 |
| * where r is what will be written to the register |
| * and v is the rated or overdriver voltage of the actuator |
| */ |
| static int drv260x_calculate_voltage(unsigned int voltage) |
| { |
| return (voltage * 255 / 5600); |
| } |
| |
| static void drv260x_worker(struct work_struct *work) |
| { |
| struct drv260x_data *haptics = container_of(work, struct drv260x_data, work); |
| int error; |
| |
| gpiod_set_value(haptics->enable_gpio, 1); |
| /* Data sheet says to wait 250us before trying to communicate */ |
| udelay(250); |
| |
| error = regmap_write(haptics->regmap, |
| DRV260X_MODE, DRV260X_RT_PLAYBACK); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write set mode: %d\n", error); |
| } else { |
| error = regmap_write(haptics->regmap, |
| DRV260X_RT_PB_IN, haptics->magnitude); |
| if (error) |
| dev_err(&haptics->client->dev, |
| "Failed to set magnitude: %d\n", error); |
| } |
| } |
| |
| static int drv260x_haptics_play(struct input_dev *input, void *data, |
| struct ff_effect *effect) |
| { |
| struct drv260x_data *haptics = input_get_drvdata(input); |
| |
| haptics->mode = DRV260X_LRA_NO_CAL_MODE; |
| |
| if (effect->u.rumble.strong_magnitude > 0) |
| haptics->magnitude = effect->u.rumble.strong_magnitude; |
| else if (effect->u.rumble.weak_magnitude > 0) |
| haptics->magnitude = effect->u.rumble.weak_magnitude; |
| else |
| haptics->magnitude = 0; |
| |
| schedule_work(&haptics->work); |
| |
| return 0; |
| } |
| |
| static void drv260x_close(struct input_dev *input) |
| { |
| struct drv260x_data *haptics = input_get_drvdata(input); |
| int error; |
| |
| cancel_work_sync(&haptics->work); |
| |
| error = regmap_write(haptics->regmap, DRV260X_MODE, DRV260X_STANDBY); |
| if (error) |
| dev_err(&haptics->client->dev, |
| "Failed to enter standby mode: %d\n", error); |
| |
| gpiod_set_value(haptics->enable_gpio, 0); |
| } |
| |
| static const struct reg_sequence drv260x_lra_cal_regs[] = { |
| { DRV260X_MODE, DRV260X_AUTO_CAL }, |
| { DRV260X_CTRL3, DRV260X_NG_THRESH_2 }, |
| { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | |
| DRV260X_BRAKE_FACTOR_4X | DRV260X_LOOP_GAIN_HIGH }, |
| }; |
| |
| static const struct reg_sequence drv260x_lra_init_regs[] = { |
| { DRV260X_MODE, DRV260X_RT_PLAYBACK }, |
| { DRV260X_A_TO_V_CTRL, DRV260X_AUDIO_HAPTICS_PEAK_20MS | |
| DRV260X_AUDIO_HAPTICS_FILTER_125HZ }, |
| { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, |
| { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, |
| { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, |
| { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, |
| { DRV260X_FEEDBACK_CTRL, DRV260X_FB_REG_LRA_MODE | |
| DRV260X_BRAKE_FACTOR_2X | DRV260X_LOOP_GAIN_MED | |
| DRV260X_BEMF_GAIN_3 }, |
| { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, |
| { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 }, |
| { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ANANLOG_IN }, |
| { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, |
| }; |
| |
| static const struct reg_sequence drv260x_erm_cal_regs[] = { |
| { DRV260X_MODE, DRV260X_AUTO_CAL }, |
| { DRV260X_A_TO_V_MIN_INPUT, DRV260X_AUDIO_HAPTICS_MIN_IN_VOLT }, |
| { DRV260X_A_TO_V_MAX_INPUT, DRV260X_AUDIO_HAPTICS_MAX_IN_VOLT }, |
| { DRV260X_A_TO_V_MIN_OUT, DRV260X_AUDIO_HAPTICS_MIN_OUT_VOLT }, |
| { DRV260X_A_TO_V_MAX_OUT, DRV260X_AUDIO_HAPTICS_MAX_OUT_VOLT }, |
| { DRV260X_FEEDBACK_CTRL, DRV260X_BRAKE_FACTOR_3X | |
| DRV260X_LOOP_GAIN_MED | DRV260X_BEMF_GAIN_2 }, |
| { DRV260X_CTRL1, DRV260X_STARTUP_BOOST }, |
| { DRV260X_CTRL2, DRV260X_SAMP_TIME_250 | DRV260X_BLANK_TIME_75 | |
| DRV260X_IDISS_TIME_75 }, |
| { DRV260X_CTRL3, DRV260X_NG_THRESH_2 | DRV260X_ERM_OPEN_LOOP }, |
| { DRV260X_CTRL4, DRV260X_AUTOCAL_TIME_500MS }, |
| }; |
| |
| static int drv260x_init(struct drv260x_data *haptics) |
| { |
| int error; |
| unsigned int cal_buf; |
| |
| error = regmap_write(haptics->regmap, |
| DRV260X_RATED_VOLT, haptics->rated_voltage); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write DRV260X_RATED_VOLT register: %d\n", |
| error); |
| return error; |
| } |
| |
| error = regmap_write(haptics->regmap, |
| DRV260X_OD_CLAMP_VOLT, haptics->overdrive_voltage); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write DRV260X_OD_CLAMP_VOLT register: %d\n", |
| error); |
| return error; |
| } |
| |
| switch (haptics->mode) { |
| case DRV260X_LRA_MODE: |
| error = regmap_register_patch(haptics->regmap, |
| drv260x_lra_cal_regs, |
| ARRAY_SIZE(drv260x_lra_cal_regs)); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write LRA calibration registers: %d\n", |
| error); |
| return error; |
| } |
| |
| break; |
| |
| case DRV260X_ERM_MODE: |
| error = regmap_register_patch(haptics->regmap, |
| drv260x_erm_cal_regs, |
| ARRAY_SIZE(drv260x_erm_cal_regs)); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write ERM calibration registers: %d\n", |
| error); |
| return error; |
| } |
| |
| error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, |
| DRV260X_LIB_SEL_MASK, |
| haptics->library); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write DRV260X_LIB_SEL register: %d\n", |
| error); |
| return error; |
| } |
| |
| break; |
| |
| default: |
| error = regmap_register_patch(haptics->regmap, |
| drv260x_lra_init_regs, |
| ARRAY_SIZE(drv260x_lra_init_regs)); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write LRA init registers: %d\n", |
| error); |
| return error; |
| } |
| |
| error = regmap_update_bits(haptics->regmap, DRV260X_LIB_SEL, |
| DRV260X_LIB_SEL_MASK, |
| haptics->library); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write DRV260X_LIB_SEL register: %d\n", |
| error); |
| return error; |
| } |
| |
| /* No need to set GO bit here */ |
| return 0; |
| } |
| |
| error = regmap_write(haptics->regmap, DRV260X_GO, DRV260X_GO_BIT); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to write GO register: %d\n", |
| error); |
| return error; |
| } |
| |
| do { |
| error = regmap_read(haptics->regmap, DRV260X_GO, &cal_buf); |
| if (error) { |
| dev_err(&haptics->client->dev, |
| "Failed to read GO register: %d\n", |
| error); |
| return error; |
| } |
| } while (cal_buf == DRV260X_GO_BIT); |
| |
| return 0; |
| } |
| |
| static const struct regmap_config drv260x_regmap_config = { |
| .reg_bits = 8, |
| .val_bits = 8, |
| |
| .max_register = DRV260X_MAX_REG, |
| .reg_defaults = drv260x_reg_defs, |
| .num_reg_defaults = ARRAY_SIZE(drv260x_reg_defs), |
| .cache_type = REGCACHE_NONE, |
| }; |
| |
| static int drv260x_probe(struct i2c_client *client) |
| { |
| struct device *dev = &client->dev; |
| struct drv260x_data *haptics; |
| u32 voltage; |
| int error; |
| |
| haptics = devm_kzalloc(dev, sizeof(*haptics), GFP_KERNEL); |
| if (!haptics) |
| return -ENOMEM; |
| |
| error = device_property_read_u32(dev, "mode", &haptics->mode); |
| if (error) { |
| dev_err(dev, "Can't fetch 'mode' property: %d\n", error); |
| return error; |
| } |
| |
| if (haptics->mode < DRV260X_LRA_MODE || |
| haptics->mode > DRV260X_ERM_MODE) { |
| dev_err(dev, "Vibrator mode is invalid: %i\n", haptics->mode); |
| return -EINVAL; |
| } |
| |
| error = device_property_read_u32(dev, "library-sel", &haptics->library); |
| if (error) { |
| dev_err(dev, "Can't fetch 'library-sel' property: %d\n", error); |
| return error; |
| } |
| |
| if (haptics->library < DRV260X_LIB_EMPTY || |
| haptics->library > DRV260X_ERM_LIB_F) { |
| dev_err(dev, |
| "Library value is invalid: %i\n", haptics->library); |
| return -EINVAL; |
| } |
| |
| if (haptics->mode == DRV260X_LRA_MODE && |
| haptics->library != DRV260X_LIB_EMPTY && |
| haptics->library != DRV260X_LIB_LRA) { |
| dev_err(dev, "LRA Mode with ERM Library mismatch\n"); |
| return -EINVAL; |
| } |
| |
| if (haptics->mode == DRV260X_ERM_MODE && |
| (haptics->library == DRV260X_LIB_EMPTY || |
| haptics->library == DRV260X_LIB_LRA)) { |
| dev_err(dev, "ERM Mode with LRA Library mismatch\n"); |
| return -EINVAL; |
| } |
| |
| error = device_property_read_u32(dev, "vib-rated-mv", &voltage); |
| haptics->rated_voltage = error ? DRV260X_DEF_RATED_VOLT : |
| drv260x_calculate_voltage(voltage); |
| |
| error = device_property_read_u32(dev, "vib-overdrive-mv", &voltage); |
| haptics->overdrive_voltage = error ? DRV260X_DEF_OD_CLAMP_VOLT : |
| drv260x_calculate_voltage(voltage); |
| |
| haptics->regulator = devm_regulator_get(dev, "vbat"); |
| if (IS_ERR(haptics->regulator)) { |
| error = PTR_ERR(haptics->regulator); |
| dev_err(dev, "unable to get regulator, error: %d\n", error); |
| return error; |
| } |
| |
| haptics->enable_gpio = devm_gpiod_get_optional(dev, "enable", |
| GPIOD_OUT_HIGH); |
| if (IS_ERR(haptics->enable_gpio)) |
| return PTR_ERR(haptics->enable_gpio); |
| |
| haptics->input_dev = devm_input_allocate_device(dev); |
| if (!haptics->input_dev) { |
| dev_err(dev, "Failed to allocate input device\n"); |
| return -ENOMEM; |
| } |
| |
| haptics->input_dev->name = "drv260x:haptics"; |
| haptics->input_dev->close = drv260x_close; |
| input_set_drvdata(haptics->input_dev, haptics); |
| input_set_capability(haptics->input_dev, EV_FF, FF_RUMBLE); |
| |
| error = input_ff_create_memless(haptics->input_dev, NULL, |
| drv260x_haptics_play); |
| if (error) { |
| dev_err(dev, "input_ff_create() failed: %d\n", error); |
| return error; |
| } |
| |
| INIT_WORK(&haptics->work, drv260x_worker); |
| |
| haptics->client = client; |
| i2c_set_clientdata(client, haptics); |
| |
| haptics->regmap = devm_regmap_init_i2c(client, &drv260x_regmap_config); |
| if (IS_ERR(haptics->regmap)) { |
| error = PTR_ERR(haptics->regmap); |
| dev_err(dev, "Failed to allocate register map: %d\n", error); |
| return error; |
| } |
| |
| error = drv260x_init(haptics); |
| if (error) { |
| dev_err(dev, "Device init failed: %d\n", error); |
| return error; |
| } |
| |
| error = input_register_device(haptics->input_dev); |
| if (error) { |
| dev_err(dev, "couldn't register input device: %d\n", error); |
| return error; |
| } |
| |
| return 0; |
| } |
| |
| static int drv260x_suspend(struct device *dev) |
| { |
| struct drv260x_data *haptics = dev_get_drvdata(dev); |
| int ret = 0; |
| |
| mutex_lock(&haptics->input_dev->mutex); |
| |
| if (input_device_enabled(haptics->input_dev)) { |
| ret = regmap_update_bits(haptics->regmap, |
| DRV260X_MODE, |
| DRV260X_STANDBY_MASK, |
| DRV260X_STANDBY); |
| if (ret) { |
| dev_err(dev, "Failed to set standby mode\n"); |
| goto out; |
| } |
| |
| gpiod_set_value(haptics->enable_gpio, 0); |
| |
| ret = regulator_disable(haptics->regulator); |
| if (ret) { |
| dev_err(dev, "Failed to disable regulator\n"); |
| regmap_update_bits(haptics->regmap, |
| DRV260X_MODE, |
| DRV260X_STANDBY_MASK, 0); |
| } |
| } |
| out: |
| mutex_unlock(&haptics->input_dev->mutex); |
| return ret; |
| } |
| |
| static int drv260x_resume(struct device *dev) |
| { |
| struct drv260x_data *haptics = dev_get_drvdata(dev); |
| int ret = 0; |
| |
| mutex_lock(&haptics->input_dev->mutex); |
| |
| if (input_device_enabled(haptics->input_dev)) { |
| ret = regulator_enable(haptics->regulator); |
| if (ret) { |
| dev_err(dev, "Failed to enable regulator\n"); |
| goto out; |
| } |
| |
| ret = regmap_update_bits(haptics->regmap, |
| DRV260X_MODE, |
| DRV260X_STANDBY_MASK, 0); |
| if (ret) { |
| dev_err(dev, "Failed to unset standby mode\n"); |
| regulator_disable(haptics->regulator); |
| goto out; |
| } |
| |
| gpiod_set_value(haptics->enable_gpio, 1); |
| } |
| |
| out: |
| mutex_unlock(&haptics->input_dev->mutex); |
| return ret; |
| } |
| |
| static DEFINE_SIMPLE_DEV_PM_OPS(drv260x_pm_ops, drv260x_suspend, drv260x_resume); |
| |
| static const struct i2c_device_id drv260x_id[] = { |
| { "drv2605l", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, drv260x_id); |
| |
| static const struct of_device_id drv260x_of_match[] = { |
| { .compatible = "ti,drv2604", }, |
| { .compatible = "ti,drv2604l", }, |
| { .compatible = "ti,drv2605", }, |
| { .compatible = "ti,drv2605l", }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(of, drv260x_of_match); |
| |
| static struct i2c_driver drv260x_driver = { |
| .probe_new = drv260x_probe, |
| .driver = { |
| .name = "drv260x-haptics", |
| .of_match_table = drv260x_of_match, |
| .pm = pm_sleep_ptr(&drv260x_pm_ops), |
| }, |
| .id_table = drv260x_id, |
| }; |
| module_i2c_driver(drv260x_driver); |
| |
| MODULE_DESCRIPTION("TI DRV260x haptics driver"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>"); |