// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2022 Rockchip Electronics Co. Ltd.
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*
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* Author: Kay Guo <kay.guo@rock-chips.com>
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*/
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#include <linux/atomic.h>
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#include <linux/delay.h>
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#ifdef CONFIG_HAS_EARLYSUSPEND
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#include <linux/earlysuspend.h>
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#endif
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#include <linux/freezer.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/irq.h>
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#include <linux/miscdevice.h>
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#include <linux/of_gpio.h>
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#include <linux/sensor-dev.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/workqueue.h>
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#define SYSM_CTRL 0x00
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#define INT_CTRL 0x01
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#define INT_FLAG 0x02
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#define WAIT_TIME 0x03
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#define ALS_GAIN 0x04
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#define ALS_TIME 0x05
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#define LED_CTRL 0x06
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#define PS_GAIN 0x07
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#define PS_PULSE 0x08
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#define PS_TIME 0x09
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#define PERSISTENCE 0x0B
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#define ALS_THR_LL 0x0C
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#define ALS_THR_LH 0x0D
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#define ALS_THR_HL 0x0E
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#define ALS_THR_HH 0x0F
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#define PS_THR_LL 0x10
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#define PS_THR_LH 0x11
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#define PS_THR_HL 0x12
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#define PS_THR_HH 0x13
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#define PS_OFFSET_L 0x14
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#define PS_OFFSET_H 0x15
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#define INT_SOURCE 0x16
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#define ERROR_FLAG 0x17
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#define PS_DATA_L 0x18
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#define PS_DATA_H 0x19
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#define IR_DATA_L 0x1A
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#define IR_DATA_H 0x1B
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#define CH0_DATA_L 0x1C
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#define CH0_DATA_H 0x1D
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#define CH1_DATA_L 0x1E
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#define CH1_DATA_H 0x1F
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/* SYSM_CTRL 0x00 */
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#define ALS_DISABLE (0 << 0)
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#define ALS_ENABLE (1 << 0)
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#define PS_DISABLE (0 << 1)
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#define PS_ENABLE (1 << 1)
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#define FRST_DISABLE (0 << 5)
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#define FRST_ENABLE (1 << 5)
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#define WAIT_DISABLE (0 << 6)
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#define WAIT_ENABLE (1 << 6)
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#define SWRST_START (1 << 7)
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/* INT_CTRL 0x01 */
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#define AINT_DISABLE (0 << 0)
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#define AINT_ENABLE (1 << 0)
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#define PINT_DISABLE (0 << 1)
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#define PINT_ENABLE (1 << 1)
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#define ALS_PEND_EN (1 << 4)
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#define ALS_PEND_DIS (0 << 4)
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#define PS_PEND_EN (1 << 5)
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#define PS_PEND_DIS (0 << 5)
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#define SPEED_UP_EN (1 << 6)
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#define SPEED_UP_DIS (0 << 6)
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#define PS_INT_HYS (0 << 7)
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#define PS_INT_ZONE (1 << 7)
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/* INT_FLAG 0x02 */
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#define ALS_INT_FLAG (1 << 0)
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#define PS_INT_FLAG (1 << 1)
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#define OBJ_DET_FLAG (1 << 5)
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#define DATA_INVALID (1 << 6)
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#define POWER_ON_FLAG (1 << 7)
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/* WAIT_TIME 0x03 */
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#define WAIT_TIME_5MS(X) (X)
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/* ALS_GAIN 0x04*/
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#define ALS_GAIN_1 0x00
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#define ALS_GAIN_4 0x01
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#define ALS_GAIN_8 0x02
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#define ALS_GAIN_32 0x03
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#define ALS_GAIN_96 0x04
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#define ALS_GAIN_192 0x05
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#define ALS_GAIN_368 0x06
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/* LED_CTRL */
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#define IR_12_5MA (0 << 6)
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#define IR_100MA (1 << 6)
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#define IR_150MA (2 << 6)
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#define IR_200MA (3 << 6)
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/* PS_GAIN 0x07 */
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#define PS_GAIN_1 (1 << 0)
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#define PS_GAIN_2 (1 << 1)
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#define PS_GAIN_4 (1 << 2)
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#define PS_GAIN_8 (1 << 4)
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#define PS_PULSE_NUM(X) (X)
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#define LED_PULSE_WIDTH (0x0f)
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static int ps_threshold_low;
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static int ps_threshold_high;
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static int sensor_active(struct i2c_client *client, int enable, int rate)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *)i2c_get_clientdata(client);
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int result = 0;
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int status = 0;
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sensor->ops->ctrl_data = sensor_read_reg(client, sensor->ops->ctrl_reg);
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if (!enable) {
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status = ~PS_ENABLE;
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sensor->ops->ctrl_data &= status;
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} else {
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status = PS_ENABLE;
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sensor->ops->ctrl_data |= status;
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}
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dev_dbg(&client->dev, "reg=0x%x, reg_ctrl=0x%x, enable=%d\n",
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sensor->ops->ctrl_reg, sensor->ops->ctrl_data, enable);
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result = sensor_write_reg(client, sensor->ops->ctrl_reg,
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sensor->ops->ctrl_data);
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if (result)
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dev_err(&client->dev, "%s:fail to active sensor\n", __func__);
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return result;
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}
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static int sensor_init(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *)i2c_get_clientdata(client);
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struct device_node *np = client->dev.of_node;
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int ps_val = 0;
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int result = 0;
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int val = 0;
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result = sensor->ops->active(client, 0, 0);
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if (result) {
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dev_err(&client->dev, "%s:sensor active fail\n", __func__);
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return result;
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}
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sensor->status_cur = SENSOR_OFF;
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result = of_property_read_u32(np, "ps_threshold_low", &ps_val);
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if (result)
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dev_err(&client->dev, "%s:Unable to read ps_threshold_low\n",
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__func__);
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ps_threshold_low = ps_val;
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result = sensor_write_reg(client, PS_THR_LH,
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(unsigned char)(ps_val >> 8));
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if (result) {
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dev_err(&client->dev, "%s:write PS_THR_LH fail\n", __func__);
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return result;
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}
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result = sensor_write_reg(client, PS_THR_LL, (unsigned char)ps_val);
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if (result) {
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dev_err(&client->dev, "%s:write PS_THR_LL fail\n", __func__);
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return result;
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}
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result = of_property_read_u32(np, "ps_threshold_high", &ps_val);
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if (result)
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dev_err(&client->dev, "%s:Unable to read ps_threshold_high\n",
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__func__);
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ps_threshold_high = ps_val;
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result = sensor_write_reg(client, PS_THR_HH,
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(unsigned char)(ps_val >> 8));
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if (result) {
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dev_err(&client->dev, "%s:write PS_THR_HH fail\n", __func__);
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return result;
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}
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result = sensor_write_reg(client, PS_THR_HL, (unsigned char)ps_val);
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if (result) {
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dev_err(&client->dev, "%s:write PS_THR_HL fail\n", __func__);
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return result;
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}
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result = of_property_read_u32(np, "ps_ctrl_gain", &ps_val);
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if (result)
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dev_err(&client->dev, "%s:Unable to read ps_ctrl_gain\n",
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__func__);
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result = sensor_write_reg(client, PS_GAIN, (unsigned char)ps_val);
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if (result) {
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dev_err(&client->dev, "%s:write PS_GAIN fail\n", __func__);
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return result;
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}
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result = of_property_read_u32(np, "ps_led_current", &ps_val);
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if (result)
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dev_err(&client->dev, "%s:Unable to read ps_led_current\n",
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__func__);
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result |= sensor_write_reg(client, LED_CTRL,
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(unsigned char)((ps_val << 6) | LED_PULSE_WIDTH));
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if (result) {
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dev_err(&client->dev, "%s:write LED_CTRL fail\n", __func__);
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return result;
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}
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val = sensor_read_reg(client, INT_CTRL);
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if (sensor->pdata->irq_enable) {
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val |= PINT_ENABLE;
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val |= PS_PEND_EN;
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} else {
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val &= PINT_DISABLE;
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}
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result = sensor_write_reg(client, INT_CTRL, val);
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if (result) {
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dev_err(&client->dev, "%s:write INT_CTRL fail\n", __func__);
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return result;
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}
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return result;
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}
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static int ucs14620_get_ps_value(int ps)
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{
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int index = 0;
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static int value = 1;
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if (ps > ps_threshold_high) {
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index = 0;
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value = 0;
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} else if (ps < ps_threshold_low) {
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index = 1;
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value = 1;
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} else {
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index = value;
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}
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return index;
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}
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static int sensor_report_value(struct i2c_client *client)
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{
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struct sensor_private_data *sensor =
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(struct sensor_private_data *)i2c_get_clientdata(client);
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int result = 0;
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int value = 0;
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char buffer[2] = { 0 };
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int index = 1;
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if (sensor->ops->read_len < 2) {
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dev_err(&client->dev, "%s:length is error, len=%d\n", __func__,
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sensor->ops->read_len);
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return -EINVAL;
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}
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buffer[0] = sensor->ops->read_reg;
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result = sensor_rx_data(client, buffer, sensor->ops->read_len);
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if (result) {
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dev_err(&client->dev, "%s:sensor read data fail\n", __func__);
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return result;
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}
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value = (buffer[1] << 8) | buffer[0];
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if (sensor->pdata->irq_enable && sensor->ops->int_status_reg) {
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value = sensor_read_reg(client, sensor->ops->int_status_reg);
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if (value & PS_INT_FLAG)
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index = 0;
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else
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index = 1;
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input_report_abs(sensor->input_dev, ABS_DISTANCE, index);
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input_sync(sensor->input_dev);
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value &= ~PS_INT_FLAG;
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result = sensor_write_reg(client,
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sensor->ops->int_status_reg,
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value);
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dev_dbg(&client->dev, "%s object near = %d", sensor->ops->name, index);
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if (result) {
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dev_err(&client->dev, "write status reg error\n");
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return result;
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}
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} else if (!sensor->pdata->irq_enable) {
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index = ucs14620_get_ps_value(value);
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input_report_abs(sensor->input_dev, ABS_DISTANCE, index);
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input_sync(sensor->input_dev);
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dev_dbg(&client->dev, "%s sensor closed=%d\n",
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sensor->ops->name, index);
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}
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return result;
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}
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static struct sensor_operate psensor_ucs14620_ops = {
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.name = "ps_ucs14620",
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.type = SENSOR_TYPE_PROXIMITY,
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.id_i2c = PROXIMITY_ID_UCS14620,
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.read_reg = PS_DATA_L,
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.read_len = 2,
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.id_reg = SENSOR_UNKNOW_DATA,
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.id_data = SENSOR_UNKNOW_DATA,
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.precision = 16,
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.ctrl_reg = SYSM_CTRL,
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.int_status_reg = INT_FLAG,
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.range = { 100, 65535 },
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.brightness = { 10, 255 },
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.trig = IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
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.active = sensor_active,
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.init = sensor_init,
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.report = sensor_report_value,
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};
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static int proximity_ucs14620_probe(struct i2c_client *client,
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const struct i2c_device_id *devid)
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{
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return sensor_register_device(client, NULL, devid, &psensor_ucs14620_ops);
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}
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static int proximity_ucs14620_remove(struct i2c_client *client)
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{
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return sensor_unregister_device(client, NULL, &psensor_ucs14620_ops);
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}
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static const struct i2c_device_id proximity_ucs14620_id[] = {
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{ "ps_ucs14620", PROXIMITY_ID_UCS14620 },
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{}
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};
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static struct i2c_driver proximity_ucs14620_driver = {
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.probe = proximity_ucs14620_probe,
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.remove = proximity_ucs14620_remove,
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.shutdown = sensor_shutdown,
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.id_table = proximity_ucs14620_id,
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.driver = {
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.name = "ps_ucs14620",
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#ifdef CONFIG_PM
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.pm = &sensor_pm_ops,
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#endif
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},
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};
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module_i2c_driver(proximity_ucs14620_driver);
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MODULE_AUTHOR("Kay Guo<yangbin@rock-chips.com>");
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MODULE_DESCRIPTION("ucs14620 proximity driver");
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MODULE_LICENSE("GPL");
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