diff options
Diffstat (limited to 'drivers/input/misc/drv260x.c')
| -rw-r--r-- | drivers/input/misc/drv260x.c | 677 |
1 files changed, 677 insertions, 0 deletions
diff --git a/drivers/input/misc/drv260x.c b/drivers/input/misc/drv260x.c new file mode 100644 index 000000000..17eb84ab4 --- /dev/null +++ b/drivers/input/misc/drv260x.c @@ -0,0 +1,677 @@ +/* + * DRV260X haptics driver family + * + * Author: Dan Murphy <dmurphy@ti.com> + * + * Copyright: (C) 2014 Texas Instruments, Inc. + * + * 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. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + */ + +#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 + * @overdriver_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, + const struct i2c_device_id *id) +{ + 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 __maybe_unused drv260x_suspend(struct device *dev) +{ + struct drv260x_data *haptics = dev_get_drvdata(dev); + int ret = 0; + + mutex_lock(&haptics->input_dev->mutex); + + if (haptics->input_dev->users) { + 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 __maybe_unused drv260x_resume(struct device *dev) +{ + struct drv260x_data *haptics = dev_get_drvdata(dev); + int ret = 0; + + mutex_lock(&haptics->input_dev->mutex); + + if (haptics->input_dev->users) { + 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 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 = drv260x_probe, + .driver = { + .name = "drv260x-haptics", + .of_match_table = drv260x_of_match, + .pm = &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>"); |