/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 and * only 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "leds.h" #include #include #define FLASH_LED_PERIPHERAL_SUBTYPE(base) (base + 0x05) #define FLASH_SAFETY_TIMER(base) (base + 0x40) #define FLASH_MAX_CURRENT(base) (base + 0x41) #define FLASH_LED0_CURRENT(base) (base + 0x42) #define FLASH_LED1_CURRENT(base) (base + 0x43) #define FLASH_CLAMP_CURRENT(base) (base + 0x44) #define FLASH_MODULE_ENABLE_CTRL(base) (base + 0x46) #define FLASH_LED_STROBE_CTRL(base) (base + 0x47) #define FLASH_LED_TMR_CTRL(base) (base + 0x48) #define FLASH_HEADROOM(base) (base + 0x4A) #define FLASH_STARTUP_DELAY(base) (base + 0x4B) #define FLASH_MASK_ENABLE(base) (base + 0x4C) #define FLASH_VREG_OK_FORCE(base) (base + 0x4F) #define FLASH_FAULT_DETECT(base) (base + 0x51) #define FLASH_THERMAL_DRATE(base) (base + 0x52) #define FLASH_CURRENT_RAMP(base) (base + 0x54) #define FLASH_VPH_PWR_DROOP(base) (base + 0x5A) #define FLASH_HDRM_SNS_ENABLE_CTRL0(base) (base + 0x5C) #define FLASH_HDRM_SNS_ENABLE_CTRL1(base) (base + 0x5D) #define FLASH_LED_UNLOCK_SECURE(base) (base + 0xD0) #define FLASH_PERPH_RESET_CTRL(base) (base + 0xDA) #define FLASH_TORCH(base) (base + 0xE4) #define FLASH_STATUS_REG_MASK 0xFF #define FLASH_LED_FAULT_STATUS(base) (base + 0x08) #define INT_LATCHED_STS(base) (base + 0x18) #define IN_POLARITY_HIGH(base) (base + 0x12) #define INT_SET_TYPE(base) (base + 0x11) #define INT_EN_SET(base) (base + 0x15) #define INT_LATCHED_CLR(base) (base + 0x14) #define FLASH_HEADROOM_MASK 0x03 #define FLASH_STARTUP_DLY_MASK 0x03 #define FLASH_VREG_OK_FORCE_MASK 0xC0 #define FLASH_FAULT_DETECT_MASK 0x80 #define FLASH_THERMAL_DERATE_MASK 0xBF #define FLASH_SECURE_MASK 0xFF #define FLASH_TORCH_MASK 0x03 #define FLASH_CURRENT_MASK 0x7F #define FLASH_TMR_MASK 0x03 #define FLASH_TMR_SAFETY 0x00 #define FLASH_SAFETY_TIMER_MASK 0x7F #define FLASH_MODULE_ENABLE_MASK 0xE0 #define FLASH_STROBE_MASK 0xC0 #define FLASH_CURRENT_RAMP_MASK 0xBF #define FLASH_VPH_PWR_DROOP_MASK 0xF3 #define FLASH_LED_HDRM_SNS_ENABLE_MASK 0x81 #define FLASH_MASK_MODULE_CONTRL_MASK 0xE0 #define FLASH_FOLLOW_OTST2_RB_MASK 0x08 #define FLASH_LED_TRIGGER_DEFAULT "none" #define FLASH_LED_HEADROOM_DEFAULT_MV 500 #define FLASH_LED_STARTUP_DELAY_DEFAULT_US 128 #define FLASH_LED_CLAMP_CURRENT_DEFAULT_MA 200 #define FLASH_LED_THERMAL_DERATE_THRESHOLD_DEFAULT_C 80 #define FLASH_LED_RAMP_UP_STEP_DEFAULT_US 3 #define FLASH_LED_RAMP_DN_STEP_DEFAULT_US 3 #define FLASH_LED_VPH_PWR_DROOP_THRESHOLD_DEFAULT_MV 3200 #define FLASH_LED_VPH_PWR_DROOP_DEBOUNCE_TIME_DEFAULT_US 10 #define FLASH_LED_THERMAL_DERATE_RATE_DEFAULT_PERCENT 2 #define FLASH_RAMP_UP_DELAY_US_MIN 1000 #define FLASH_RAMP_UP_DELAY_US_MAX 1001 #define FLASH_RAMP_DN_DELAY_US_MIN 2160 #define FLASH_RAMP_DN_DELAY_US_MAX 2161 #define FLASH_BOOST_REGULATOR_PROBE_DELAY_MS 2000 #define FLASH_TORCH_MAX_LEVEL 0x0F #define FLASH_MAX_LEVEL 0x4F #define FLASH_LED_FLASH_HW_VREG_OK 0x40 #define FLASH_LED_FLASH_SW_VREG_OK 0x80 #define FLASH_LED_STROBE_TYPE_HW 0x04 #define FLASH_DURATION_DIVIDER 10 #define FLASH_LED_HEADROOM_DIVIDER 100 #define FLASH_LED_HEADROOM_OFFSET 2 #define FLASH_LED_MAX_CURRENT_MA 1000 #define FLASH_LED_THERMAL_THRESHOLD_MIN 95 #define FLASH_LED_THERMAL_DEVIDER 10 #define FLASH_LED_VPH_DROOP_THRESHOLD_MIN_MV 2500 #define FLASH_LED_VPH_DROOP_THRESHOLD_DIVIDER 100 #define FLASH_LED_HDRM_SNS_ENABLE 0x81 #define FLASH_LED_HDRM_SNS_DISABLE 0x01 #define FLASH_LED_UA_PER_MA 1000 #define FLASH_LED_MASK_MODULE_MASK2_ENABLE 0x20 #define FLASH_LED_MASK3_ENABLE_SHIFT 7 #define FLASH_LED_MODULE_CTRL_DEFAULT 0x60 #define FLASH_LED_CURRENT_READING_DELAY_MIN 5000 #define FLASH_LED_CURRENT_READING_DELAY_MAX 5001 #define FLASH_LED_OPEN_FAULT_DETECTED 0xC #define FLASH_UNLOCK_SECURE 0xA5 #define FLASH_LED_TORCH_ENABLE 0x00 #define FLASH_LED_TORCH_DISABLE 0x03 #define FLASH_MODULE_ENABLE 0x80 #define FLASH_LED0_TRIGGER 0x80 #define FLASH_LED1_TRIGGER 0x40 #define FLASH_LED0_ENABLEMENT 0x40 #define FLASH_LED1_ENABLEMENT 0x20 #define FLASH_LED_DISABLE 0x00 #define FLASH_LED_MIN_CURRENT_MA 13 #define FLASH_SUBTYPE_DUAL 0x01 #define FLASH_SUBTYPE_SINGLE 0x02 /* * ID represents physical LEDs for individual control purpose. */ enum flash_led_id { FLASH_LED_0 = 0, FLASH_LED_1, FLASH_LED_SWITCH, }; enum flash_led_type { FLASH = 0, TORCH, SWITCH, }; enum thermal_derate_rate { RATE_1_PERCENT = 0, RATE_1P25_PERCENT, RATE_2_PERCENT, RATE_2P5_PERCENT, RATE_5_PERCENT, }; enum current_ramp_steps { RAMP_STEP_0P2_US = 0, RAMP_STEP_0P4_US, RAMP_STEP_0P8_US, RAMP_STEP_1P6_US, RAMP_STEP_3P3_US, RAMP_STEP_6P7_US, RAMP_STEP_13P5_US, RAMP_STEP_27US, }; struct flash_regulator_data { struct regulator *regs; const char *reg_name; u32 max_volt_uv; }; /* * Configurations for each individual LED */ struct flash_node_data { struct platform_device *pdev; struct regmap *regmap; struct led_classdev cdev; struct work_struct work; struct flash_regulator_data *reg_data; u16 max_current; u16 prgm_current; u16 prgm_current2; u16 duration; u8 id; u8 type; u8 trigger; u8 enable; u8 num_regulators; bool flash_on; }; /* * Flash LED configuration read from device tree */ struct flash_led_platform_data { unsigned int temp_threshold_num; unsigned int temp_derate_curr_num; unsigned int *die_temp_derate_curr_ma; unsigned int *die_temp_threshold_degc; u16 ramp_up_step; u16 ramp_dn_step; u16 vph_pwr_droop_threshold; u16 headroom; u16 clamp_current; u8 thermal_derate_threshold; u8 vph_pwr_droop_debounce_time; u8 startup_dly; u8 thermal_derate_rate; bool pmic_charger_support; bool self_check_en; bool thermal_derate_en; bool current_ramp_en; bool vph_pwr_droop_en; bool hdrm_sns_ch0_en; bool hdrm_sns_ch1_en; bool power_detect_en; bool mask3_en; bool follow_rb_disable; bool die_current_derate_en; }; struct qpnp_flash_led_buffer { size_t rpos; size_t wpos; size_t len; char data[0]; }; /* * Flash LED data structure containing flash LED attributes */ struct qpnp_flash_led { struct pmic_revid_data *revid_data; struct platform_device *pdev; struct regmap *regmap; struct flash_led_platform_data *pdata; struct pinctrl *pinctrl; struct pinctrl_state *gpio_state_active; struct pinctrl_state *gpio_state_suspend; struct flash_node_data *flash_node; struct power_supply *battery_psy; struct workqueue_struct *ordered_workq; struct qpnp_vadc_chip *vadc_dev; struct mutex flash_led_lock; struct qpnp_flash_led_buffer *log; struct dentry *dbgfs_root; int num_leds; u32 buffer_cnt; u16 base; u16 current_addr; u16 current2_addr; u8 peripheral_type; u8 fault_reg; bool gpio_enabled; bool charging_enabled; bool strobe_debug; bool dbg_feature_en; bool open_fault; }; static u8 qpnp_flash_led_ctrl_dbg_regs[] = { 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x4A, 0x4B, 0x4C, 0x4F, 0x51, 0x52, 0x54, 0x55, 0x5A, 0x5C, 0x5D, }; static int flash_led_dbgfs_file_open(struct qpnp_flash_led *led, struct file *file) { struct qpnp_flash_led_buffer *log; size_t logbufsize = SZ_4K; log = kzalloc(logbufsize, GFP_KERNEL); if (!log) return -ENOMEM; log->rpos = 0; log->wpos = 0; log->len = logbufsize - sizeof(*log); led->log = log; led->buffer_cnt = 1; file->private_data = led; return 0; } static int flash_led_dfs_open(struct inode *inode, struct file *file) { struct qpnp_flash_led *led = inode->i_private; return flash_led_dbgfs_file_open(led, file); } static int flash_led_dfs_close(struct inode *inode, struct file *file) { struct qpnp_flash_led *led = file->private_data; if (led && led->log) { file->private_data = NULL; kfree(led->log); } return 0; } static int print_to_log(struct qpnp_flash_led_buffer *log, const char *fmt, ...) { va_list args; int cnt; char *log_buf = &log->data[log->wpos]; size_t size = log->len - log->wpos; va_start(args, fmt); cnt = vscnprintf(log_buf, size, fmt, args); va_end(args); log->wpos += cnt; return cnt; } static ssize_t flash_led_dfs_latched_reg_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos) { struct qpnp_flash_led *led = fp->private_data; struct qpnp_flash_led_buffer *log = led->log; uint val; int rc; size_t len; size_t ret; if (log->rpos >= log->wpos && led->buffer_cnt == 0) return 0; rc = regmap_read(led->regmap, INT_LATCHED_STS(led->base), &val); if (rc) { dev_err(&led->pdev->dev, "Unable to read from address %x, rc(%d)\n", INT_LATCHED_STS(led->base), rc); return -EINVAL; } led->buffer_cnt--; rc = print_to_log(log, "0x%05X ", INT_LATCHED_STS(led->base)); if (rc == 0) return rc; rc = print_to_log(log, "0x%02X ", val); if (rc == 0) return rc; if (log->wpos > 0 && log->data[log->wpos - 1] == ' ') log->data[log->wpos - 1] = '\n'; len = min(count, log->wpos - log->rpos); ret = copy_to_user(buf, &log->data[log->rpos], len); if (ret) { pr_err("error copy register value to user\n"); return -EFAULT; } len -= ret; *ppos += len; log->rpos += len; return len; } static ssize_t flash_led_dfs_fault_reg_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos) { struct qpnp_flash_led *led = fp->private_data; struct qpnp_flash_led_buffer *log = led->log; int rc; size_t len; size_t ret; if (log->rpos >= log->wpos && led->buffer_cnt == 0) return 0; led->buffer_cnt--; rc = print_to_log(log, "0x%05X ", FLASH_LED_FAULT_STATUS(led->base)); if (rc == 0) return rc; rc = print_to_log(log, "0x%02X ", led->fault_reg); if (rc == 0) return rc; if (log->wpos > 0 && log->data[log->wpos - 1] == ' ') log->data[log->wpos - 1] = '\n'; len = min(count, log->wpos - log->rpos); ret = copy_to_user(buf, &log->data[log->rpos], len); if (ret) { pr_err("error copy register value to user\n"); return -EFAULT; } len -= ret; *ppos += len; log->rpos += len; return len; } static ssize_t flash_led_dfs_fault_reg_enable(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { u8 *val; int pos = 0; int cnt = 0; int data; size_t ret = 0; struct qpnp_flash_led *led = file->private_data; char *kbuf = kmalloc(count + 1, GFP_KERNEL); if (!kbuf) return -ENOMEM; ret = copy_from_user(kbuf, buf, count); if (!ret) { pr_err("failed to copy data from user\n"); ret = -EFAULT; goto free_buf; } count -= ret; *ppos += count; kbuf[count] = '\0'; val = kbuf; while (sscanf(kbuf + pos, "%i", &data) == 1) { pos++; val[cnt++] = data & 0xff; } if (!cnt) goto free_buf; ret = count; if (*val == 1) led->strobe_debug = true; else led->strobe_debug = false; free_buf: kfree(kbuf); return ret; } static ssize_t flash_led_dfs_dbg_enable(struct file *file, const char __user *buf, size_t count, loff_t *ppos) { u8 *val; int pos = 0; int cnt = 0; int data; size_t ret = 0; struct qpnp_flash_led *led = file->private_data; char *kbuf = kmalloc(count + 1, GFP_KERNEL); if (!kbuf) return -ENOMEM; ret = copy_from_user(kbuf, buf, count); if (ret == count) { pr_err("failed to copy data from user\n"); ret = -EFAULT; goto free_buf; } count -= ret; *ppos += count; kbuf[count] = '\0'; val = kbuf; while (sscanf(kbuf + pos, "%i", &data) == 1) { pos++; val[cnt++] = data & 0xff; } if (!cnt) goto free_buf; ret = count; if (*val == 1) led->dbg_feature_en = true; else led->dbg_feature_en = false; free_buf: kfree(kbuf); return ret; } static const struct file_operations flash_led_dfs_latched_reg_fops = { .open = flash_led_dfs_open, .release = flash_led_dfs_close, .read = flash_led_dfs_latched_reg_read, }; static const struct file_operations flash_led_dfs_strobe_reg_fops = { .open = flash_led_dfs_open, .release = flash_led_dfs_close, .read = flash_led_dfs_fault_reg_read, .write = flash_led_dfs_fault_reg_enable, }; static const struct file_operations flash_led_dfs_dbg_feature_fops = { .open = flash_led_dfs_open, .release = flash_led_dfs_close, .write = flash_led_dfs_dbg_enable, }; static int qpnp_led_masked_write(struct qpnp_flash_led *led, u16 addr, u8 mask, u8 val) { int rc; rc = regmap_update_bits(led->regmap, addr, mask, val); if (rc) dev_err(&led->pdev->dev, "Unable to update_bits to addr=%x, rc(%d)\n", addr, rc); dev_dbg(&led->pdev->dev, "Write 0x%02X to addr 0x%02X\n", val, addr); return rc; } static int qpnp_flash_led_get_allowed_die_temp_curr(struct qpnp_flash_led *led, int64_t die_temp_degc) { int die_temp_curr_ma; if (die_temp_degc >= led->pdata->die_temp_threshold_degc[0]) die_temp_curr_ma = 0; else if (die_temp_degc >= led->pdata->die_temp_threshold_degc[1]) die_temp_curr_ma = led->pdata->die_temp_derate_curr_ma[0]; else if (die_temp_degc >= led->pdata->die_temp_threshold_degc[2]) die_temp_curr_ma = led->pdata->die_temp_derate_curr_ma[1]; else if (die_temp_degc >= led->pdata->die_temp_threshold_degc[3]) die_temp_curr_ma = led->pdata->die_temp_derate_curr_ma[2]; else if (die_temp_degc >= led->pdata->die_temp_threshold_degc[4]) die_temp_curr_ma = led->pdata->die_temp_derate_curr_ma[3]; else die_temp_curr_ma = led->pdata->die_temp_derate_curr_ma[4]; return die_temp_curr_ma; } static int64_t qpnp_flash_led_get_die_temp(struct qpnp_flash_led *led) { struct qpnp_vadc_result die_temp_result; int rc; rc = qpnp_vadc_read(led->vadc_dev, SPARE2, &die_temp_result); if (rc) { pr_err("failed to read the die temp\n"); return -EINVAL; } return die_temp_result.physical; } static int qpnp_get_pmic_revid(struct qpnp_flash_led *led) { struct device_node *revid_dev_node; revid_dev_node = of_parse_phandle(led->pdev->dev.of_node, "qcom,pmic-revid", 0); if (!revid_dev_node) { dev_err(&led->pdev->dev, "qcom,pmic-revid property missing\n"); return -EINVAL; } led->revid_data = get_revid_data(revid_dev_node); if (IS_ERR(led->revid_data)) { pr_err("Couldn't get revid data rc = %ld\n", PTR_ERR(led->revid_data)); return PTR_ERR(led->revid_data); } return 0; } static int qpnp_flash_led_get_max_avail_current(struct flash_node_data *flash_node, struct qpnp_flash_led *led) { union power_supply_propval prop; int64_t chg_temp_milidegc, die_temp_degc; int max_curr_avail_ma = 2000; int allowed_die_temp_curr_ma = 2000; int rc; if (led->pdata->power_detect_en) { if (!led->battery_psy) { dev_err(&led->pdev->dev, "Failed to query power supply\n"); return -EINVAL; } /* * When charging is enabled, enforce this new * enabelment sequence to reduce fuel gauge * resolution reading. */ if (led->charging_enabled) { rc = qpnp_led_masked_write(led, FLASH_MODULE_ENABLE_CTRL(led->base), FLASH_MODULE_ENABLE, FLASH_MODULE_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Module enable reg write failed\n"); return -EINVAL; } usleep_range(FLASH_LED_CURRENT_READING_DELAY_MIN, FLASH_LED_CURRENT_READING_DELAY_MAX); } power_supply_get_property(led->battery_psy, POWER_SUPPLY_PROP_FLASH_CURRENT_MAX, &prop); if (!prop.intval) { dev_err(&led->pdev->dev, "battery too low for flash\n"); return -EINVAL; } max_curr_avail_ma = (prop.intval / FLASH_LED_UA_PER_MA); } /* When thermal mitigation is available, this logic * will execute, to derate current based on PMIC die * temperature. */ if (led->pdata->die_current_derate_en) { chg_temp_milidegc = qpnp_flash_led_get_die_temp(led); if (chg_temp_milidegc < 0) return -EINVAL; die_temp_degc = div_s64(chg_temp_milidegc, 1000); allowed_die_temp_curr_ma = qpnp_flash_led_get_allowed_die_temp_curr(led, die_temp_degc); if (allowed_die_temp_curr_ma < 0) return -EINVAL; } max_curr_avail_ma = (max_curr_avail_ma >= allowed_die_temp_curr_ma) ? allowed_die_temp_curr_ma : max_curr_avail_ma; return max_curr_avail_ma; } static ssize_t qpnp_flash_led_die_temp_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct qpnp_flash_led *led; struct flash_node_data *flash_node; unsigned long val; struct led_classdev *led_cdev = dev_get_drvdata(dev); ssize_t ret; ret = kstrtoul(buf, 10, &val); if (ret) return ret; flash_node = container_of(led_cdev, struct flash_node_data, cdev); led = dev_get_drvdata(&flash_node->pdev->dev); /*'0' for disable die_temp feature; non-zero to enable feature*/ if (val == 0) led->pdata->die_current_derate_en = false; else led->pdata->die_current_derate_en = true; return count; } static ssize_t qpnp_led_strobe_type_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct flash_node_data *flash_node; unsigned long state; struct led_classdev *led_cdev = dev_get_drvdata(dev); ssize_t ret = -EINVAL; ret = kstrtoul(buf, 10, &state); if (ret) return ret; flash_node = container_of(led_cdev, struct flash_node_data, cdev); /* '0' for sw strobe; '1' for hw strobe */ if (state == 1) flash_node->trigger |= FLASH_LED_STROBE_TYPE_HW; else flash_node->trigger &= ~FLASH_LED_STROBE_TYPE_HW; return count; } static ssize_t qpnp_flash_led_dump_regs_show(struct device *dev, struct device_attribute *attr, char *buf) { struct qpnp_flash_led *led; struct flash_node_data *flash_node; struct led_classdev *led_cdev = dev_get_drvdata(dev); int rc, i, count = 0; u16 addr; uint val; flash_node = container_of(led_cdev, struct flash_node_data, cdev); led = dev_get_drvdata(&flash_node->pdev->dev); for (i = 0; i < ARRAY_SIZE(qpnp_flash_led_ctrl_dbg_regs); i++) { addr = led->base + qpnp_flash_led_ctrl_dbg_regs[i]; rc = regmap_read(led->regmap, addr, &val); if (rc) { dev_err(&led->pdev->dev, "Unable to read from addr=%x, rc(%d)\n", addr, rc); return -EINVAL; } count += snprintf(buf + count, PAGE_SIZE - count, "REG_0x%x = 0x%02x\n", addr, val); if (count >= PAGE_SIZE) return PAGE_SIZE - 1; } return count; } static ssize_t qpnp_flash_led_current_derate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct qpnp_flash_led *led; struct flash_node_data *flash_node; unsigned long val; struct led_classdev *led_cdev = dev_get_drvdata(dev); ssize_t ret; ret = kstrtoul(buf, 10, &val); if (ret) return ret; flash_node = container_of(led_cdev, struct flash_node_data, cdev); led = dev_get_drvdata(&flash_node->pdev->dev); /*'0' for disable derate feature; non-zero to enable derate feature */ if (val == 0) led->pdata->power_detect_en = false; else led->pdata->power_detect_en = true; return count; } static ssize_t qpnp_flash_led_max_current_show(struct device *dev, struct device_attribute *attr, char *buf) { struct qpnp_flash_led *led; struct flash_node_data *flash_node; struct led_classdev *led_cdev = dev_get_drvdata(dev); int max_curr_avail_ma = 0; flash_node = container_of(led_cdev, struct flash_node_data, cdev); led = dev_get_drvdata(&flash_node->pdev->dev); if (led->flash_node[0].flash_on) max_curr_avail_ma += led->flash_node[0].max_current; if (led->flash_node[1].flash_on) max_curr_avail_ma += led->flash_node[1].max_current; if (led->pdata->power_detect_en || led->pdata->die_current_derate_en) { max_curr_avail_ma = qpnp_flash_led_get_max_avail_current(flash_node, led); if (max_curr_avail_ma < 0) return -EINVAL; } return snprintf(buf, PAGE_SIZE, "%u\n", max_curr_avail_ma); } static struct device_attribute qpnp_flash_led_attrs[] = { __ATTR(strobe, (S_IRUGO | S_IWUSR | S_IWGRP), NULL, qpnp_led_strobe_type_store), __ATTR(reg_dump, (S_IRUGO | S_IWUSR | S_IWGRP), qpnp_flash_led_dump_regs_show, NULL), __ATTR(enable_current_derate, (S_IRUGO | S_IWUSR | S_IWGRP), NULL, qpnp_flash_led_current_derate_store), __ATTR(max_allowed_current, (S_IRUGO | S_IWUSR | S_IWGRP), qpnp_flash_led_max_current_show, NULL), __ATTR(enable_die_temp_current_derate, (S_IRUGO | S_IWUSR | S_IWGRP), NULL, qpnp_flash_led_die_temp_store), }; static int qpnp_flash_led_get_thermal_derate_rate(const char *rate) { /* * return 5% derate as default value if user specifies * a value un-supported */ if (strcmp(rate, "1_PERCENT") == 0) return RATE_1_PERCENT; else if (strcmp(rate, "1P25_PERCENT") == 0) return RATE_1P25_PERCENT; else if (strcmp(rate, "2_PERCENT") == 0) return RATE_2_PERCENT; else if (strcmp(rate, "2P5_PERCENT") == 0) return RATE_2P5_PERCENT; else if (strcmp(rate, "5_PERCENT") == 0) return RATE_5_PERCENT; else return RATE_5_PERCENT; } static int qpnp_flash_led_get_ramp_step(const char *step) { /* * return 27 us as default value if user specifies * a value un-supported */ if (strcmp(step, "0P2_US") == 0) return RAMP_STEP_0P2_US; else if (strcmp(step, "0P4_US") == 0) return RAMP_STEP_0P4_US; else if (strcmp(step, "0P8_US") == 0) return RAMP_STEP_0P8_US; else if (strcmp(step, "1P6_US") == 0) return RAMP_STEP_1P6_US; else if (strcmp(step, "3P3_US") == 0) return RAMP_STEP_3P3_US; else if (strcmp(step, "6P7_US") == 0) return RAMP_STEP_6P7_US; else if (strcmp(step, "13P5_US") == 0) return RAMP_STEP_13P5_US; else return RAMP_STEP_27US; } static u8 qpnp_flash_led_get_droop_debounce_time(u8 val) { /* * return 10 us as default value if user specifies * a value un-supported */ switch (val) { case 0: return 0; case 10: return 1; case 32: return 2; case 64: return 3; default: return 1; } } static u8 qpnp_flash_led_get_startup_dly(u8 val) { /* * return 128 us as default value if user specifies * a value un-supported */ switch (val) { case 10: return 0; case 32: return 1; case 64: return 2; case 128: return 3; default: return 3; } } static int qpnp_flash_led_get_peripheral_type(struct qpnp_flash_led *led) { int rc; uint val; rc = regmap_read(led->regmap, FLASH_LED_PERIPHERAL_SUBTYPE(led->base), &val); if (rc) { dev_err(&led->pdev->dev, "Unable to read peripheral subtype\n"); return -EINVAL; } return val; } static int qpnp_flash_led_module_disable(struct qpnp_flash_led *led, struct flash_node_data *flash_node) { union power_supply_propval psy_prop; int rc; uint val, tmp; rc = regmap_read(led->regmap, FLASH_LED_STROBE_CTRL(led->base), &val); if (rc) { dev_err(&led->pdev->dev, "Unable to read strobe reg\n"); return -EINVAL; } tmp = (~flash_node->trigger) & val; if (!tmp) { if (flash_node->type == TORCH) { rc = qpnp_led_masked_write(led, FLASH_LED_UNLOCK_SECURE(led->base), FLASH_SECURE_MASK, FLASH_UNLOCK_SECURE); if (rc) { dev_err(&led->pdev->dev, "Secure reg write failed\n"); return -EINVAL; } rc = qpnp_led_masked_write(led, FLASH_TORCH(led->base), FLASH_TORCH_MASK, FLASH_LED_TORCH_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Torch reg write failed\n"); return -EINVAL; } } if (led->battery_psy && led->revid_data->pmic_subtype == PMI8996_SUBTYPE && !led->revid_data->rev3) { psy_prop.intval = false; rc = power_supply_set_property(led->battery_psy, POWER_SUPPLY_PROP_FLASH_TRIGGER, &psy_prop); if (rc) { dev_err(&led->pdev->dev, "Failed to enble charger i/p current limit\n"); return -EINVAL; } } rc = qpnp_led_masked_write(led, FLASH_MODULE_ENABLE_CTRL(led->base), FLASH_MODULE_ENABLE_MASK, FLASH_LED_MODULE_CTRL_DEFAULT); if (rc) { dev_err(&led->pdev->dev, "Module disable failed\n"); return -EINVAL; } if (led->pinctrl) { rc = pinctrl_select_state(led->pinctrl, led->gpio_state_suspend); if (rc) { dev_err(&led->pdev->dev, "failed to disable GPIO\n"); return -EINVAL; } led->gpio_enabled = false; } if (led->battery_psy) { psy_prop.intval = false; rc = power_supply_set_property(led->battery_psy, POWER_SUPPLY_PROP_FLASH_ACTIVE, &psy_prop); if (rc) { dev_err(&led->pdev->dev, "Failed to setup OTG pulse skip enable\n"); return -EINVAL; } } } if (flash_node->trigger & FLASH_LED0_TRIGGER) { rc = qpnp_led_masked_write(led, led->current_addr, FLASH_CURRENT_MASK, 0x00); if (rc) { dev_err(&led->pdev->dev, "current register write failed\n"); return -EINVAL; } } if (flash_node->trigger & FLASH_LED1_TRIGGER) { rc = qpnp_led_masked_write(led, led->current2_addr, FLASH_CURRENT_MASK, 0x00); if (rc) { dev_err(&led->pdev->dev, "current register write failed\n"); return -EINVAL; } } if (flash_node->id == FLASH_LED_SWITCH) flash_node->trigger &= FLASH_LED_STROBE_TYPE_HW; return 0; } static enum led_brightness qpnp_flash_led_brightness_get(struct led_classdev *led_cdev) { return led_cdev->brightness; } static int flash_regulator_parse_dt(struct qpnp_flash_led *led, struct flash_node_data *flash_node) { int i = 0, rc; struct device_node *node = flash_node->cdev.dev->of_node; struct device_node *temp = NULL; const char *temp_string; u32 val; flash_node->reg_data = devm_kzalloc(&led->pdev->dev, sizeof(struct flash_regulator_data *) * flash_node->num_regulators, GFP_KERNEL); if (!flash_node->reg_data) { dev_err(&led->pdev->dev, "Unable to allocate memory\n"); return -ENOMEM; } for_each_child_of_node(node, temp) { rc = of_property_read_string(temp, "regulator-name", &temp_string); if (!rc) flash_node->reg_data[i].reg_name = temp_string; else { dev_err(&led->pdev->dev, "Unable to read regulator name\n"); return rc; } rc = of_property_read_u32(temp, "max-voltage", &val); if (!rc) { flash_node->reg_data[i].max_volt_uv = val; } else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read max voltage\n"); return rc; } i++; } return 0; } static int flash_regulator_setup(struct qpnp_flash_led *led, struct flash_node_data *flash_node, bool on) { int i, rc = 0; if (on == false) { i = flash_node->num_regulators; goto error_regulator_setup; } for (i = 0; i < flash_node->num_regulators; i++) { flash_node->reg_data[i].regs = regulator_get(flash_node->cdev.dev, flash_node->reg_data[i].reg_name); if (IS_ERR(flash_node->reg_data[i].regs)) { rc = PTR_ERR(flash_node->reg_data[i].regs); dev_err(&led->pdev->dev, "Failed to get regulator\n"); goto error_regulator_setup; } if (regulator_count_voltages(flash_node->reg_data[i].regs) > 0) { rc = regulator_set_voltage(flash_node->reg_data[i].regs, flash_node->reg_data[i].max_volt_uv, flash_node->reg_data[i].max_volt_uv); if (rc) { dev_err(&led->pdev->dev, "regulator set voltage failed\n"); regulator_put(flash_node->reg_data[i].regs); goto error_regulator_setup; } } } return rc; error_regulator_setup: while (i--) { if (regulator_count_voltages(flash_node->reg_data[i].regs) > 0) { regulator_set_voltage(flash_node->reg_data[i].regs, 0, flash_node->reg_data[i].max_volt_uv); } regulator_put(flash_node->reg_data[i].regs); } return rc; } static int flash_regulator_enable(struct qpnp_flash_led *led, struct flash_node_data *flash_node, bool on) { int i, rc = 0; if (on == false) { i = flash_node->num_regulators; goto error_regulator_enable; } for (i = 0; i < flash_node->num_regulators; i++) { rc = regulator_enable(flash_node->reg_data[i].regs); if (rc) { dev_err(&led->pdev->dev, "regulator enable failed\n"); goto error_regulator_enable; } } return rc; error_regulator_enable: while (i--) regulator_disable(flash_node->reg_data[i].regs); return rc; } static void qpnp_flash_led_work(struct work_struct *work) { struct flash_node_data *flash_node = container_of(work, struct flash_node_data, work); struct qpnp_flash_led *led = dev_get_drvdata(&flash_node->pdev->dev); union power_supply_propval psy_prop; int rc, brightness = flash_node->cdev.brightness; int max_curr_avail_ma = 0; int total_curr_ma = 0; int i; u8 val; uint temp; mutex_lock(&led->flash_led_lock); if (!brightness) goto turn_off; if (led->open_fault) { dev_err(&led->pdev->dev, "Open fault detected\n"); mutex_unlock(&led->flash_led_lock); return; } if (!flash_node->flash_on && flash_node->num_regulators > 0) { rc = flash_regulator_enable(led, flash_node, true); if (rc) { mutex_unlock(&led->flash_led_lock); return; } } if (!led->gpio_enabled && led->pinctrl) { rc = pinctrl_select_state(led->pinctrl, led->gpio_state_active); if (rc) { dev_err(&led->pdev->dev, "failed to enable GPIO\n"); goto error_enable_gpio; } led->gpio_enabled = true; } if (led->dbg_feature_en) { rc = qpnp_led_masked_write(led, INT_SET_TYPE(led->base), FLASH_STATUS_REG_MASK, 0x1F); if (rc) { dev_err(&led->pdev->dev, "INT_SET_TYPE write failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, IN_POLARITY_HIGH(led->base), FLASH_STATUS_REG_MASK, 0x1F); if (rc) { dev_err(&led->pdev->dev, "IN_POLARITY_HIGH write failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, INT_EN_SET(led->base), FLASH_STATUS_REG_MASK, 0x1F); if (rc) { dev_err(&led->pdev->dev, "INT_EN_SET write failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, INT_LATCHED_CLR(led->base), FLASH_STATUS_REG_MASK, 0x1F); if (rc) { dev_err(&led->pdev->dev, "INT_LATCHED_CLR write failed\n"); goto exit_flash_led_work; } } if (led->flash_node[led->num_leds - 1].id == FLASH_LED_SWITCH && flash_node->id != FLASH_LED_SWITCH) { led->flash_node[led->num_leds - 1].trigger |= (0x80 >> flash_node->id); if (flash_node->id == FLASH_LED_0) led->flash_node[led->num_leds - 1].prgm_current = flash_node->prgm_current; else if (flash_node->id == FLASH_LED_1) led->flash_node[led->num_leds - 1].prgm_current2 = flash_node->prgm_current; } if (flash_node->type == TORCH) { rc = qpnp_led_masked_write(led, FLASH_LED_UNLOCK_SECURE(led->base), FLASH_SECURE_MASK, FLASH_UNLOCK_SECURE); if (rc) { dev_err(&led->pdev->dev, "Secure reg write failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, FLASH_TORCH(led->base), FLASH_TORCH_MASK, FLASH_LED_TORCH_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Torch reg write failed\n"); goto exit_flash_led_work; } if (flash_node->id == FLASH_LED_SWITCH) { val = (u8)(flash_node->prgm_current * FLASH_TORCH_MAX_LEVEL / flash_node->max_current); rc = qpnp_led_masked_write(led, led->current_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Torch reg write failed\n"); goto exit_flash_led_work; } val = (u8)(flash_node->prgm_current2 * FLASH_TORCH_MAX_LEVEL / flash_node->max_current); rc = qpnp_led_masked_write(led, led->current2_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Torch reg write failed\n"); goto exit_flash_led_work; } } else { val = (u8)(flash_node->prgm_current * FLASH_TORCH_MAX_LEVEL / flash_node->max_current); if (flash_node->id == FLASH_LED_0) { rc = qpnp_led_masked_write(led, led->current_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "current reg write failed\n"); goto exit_flash_led_work; } } else { rc = qpnp_led_masked_write(led, led->current2_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "current reg write failed\n"); goto exit_flash_led_work; } } } rc = qpnp_led_masked_write(led, FLASH_MAX_CURRENT(led->base), FLASH_CURRENT_MASK, FLASH_TORCH_MAX_LEVEL); if (rc) { dev_err(&led->pdev->dev, "Max current reg write failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, FLASH_MODULE_ENABLE_CTRL(led->base), FLASH_MODULE_ENABLE_MASK, FLASH_MODULE_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Module enable reg write failed\n"); goto exit_flash_led_work; } if (led->pdata->hdrm_sns_ch0_en || led->pdata->hdrm_sns_ch1_en) { if (flash_node->id == FLASH_LED_SWITCH) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL0(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, flash_node->trigger & FLASH_LED0_TRIGGER ? FLASH_LED_HDRM_SNS_ENABLE : FLASH_LED_HDRM_SNS_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense enable failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL1(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, flash_node->trigger & FLASH_LED1_TRIGGER ? FLASH_LED_HDRM_SNS_ENABLE : FLASH_LED_HDRM_SNS_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense enable failed\n"); goto exit_flash_led_work; } } else if (flash_node->id == FLASH_LED_0) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL0(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, FLASH_LED_HDRM_SNS_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense disable failed\n"); goto exit_flash_led_work; } } else if (flash_node->id == FLASH_LED_1) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL1(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, FLASH_LED_HDRM_SNS_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense disable failed\n"); goto exit_flash_led_work; } } } rc = qpnp_led_masked_write(led, FLASH_LED_STROBE_CTRL(led->base), (flash_node->id == FLASH_LED_SWITCH ? FLASH_STROBE_MASK | FLASH_LED_STROBE_TYPE_HW : flash_node->trigger | FLASH_LED_STROBE_TYPE_HW), flash_node->trigger); if (rc) { dev_err(&led->pdev->dev, "Strobe reg write failed\n"); goto exit_flash_led_work; } } else if (flash_node->type == FLASH) { if (flash_node->trigger & FLASH_LED0_TRIGGER) max_curr_avail_ma += flash_node->max_current; if (flash_node->trigger & FLASH_LED1_TRIGGER) max_curr_avail_ma += flash_node->max_current; psy_prop.intval = true; rc = power_supply_set_property(led->battery_psy, POWER_SUPPLY_PROP_FLASH_ACTIVE, &psy_prop); if (rc) { dev_err(&led->pdev->dev, "Failed to setup OTG pulse skip enable\n"); goto exit_flash_led_work; } if (led->pdata->power_detect_en || led->pdata->die_current_derate_en) { if (led->battery_psy) { power_supply_get_property(led->battery_psy, POWER_SUPPLY_PROP_STATUS, &psy_prop); if (psy_prop.intval < 0) { dev_err(&led->pdev->dev, "Invalid battery status\n"); goto exit_flash_led_work; } if (psy_prop.intval == POWER_SUPPLY_STATUS_CHARGING) led->charging_enabled = true; else if (psy_prop.intval == POWER_SUPPLY_STATUS_DISCHARGING || psy_prop.intval == POWER_SUPPLY_STATUS_NOT_CHARGING) led->charging_enabled = false; } max_curr_avail_ma = qpnp_flash_led_get_max_avail_current (flash_node, led); if (max_curr_avail_ma < 0) { dev_err(&led->pdev->dev, "Failed to get max avail curr\n"); goto exit_flash_led_work; } } if (flash_node->id == FLASH_LED_SWITCH) { if (flash_node->trigger & FLASH_LED0_TRIGGER) total_curr_ma += flash_node->prgm_current; if (flash_node->trigger & FLASH_LED1_TRIGGER) total_curr_ma += flash_node->prgm_current2; if (max_curr_avail_ma < total_curr_ma) { flash_node->prgm_current = (flash_node->prgm_current * max_curr_avail_ma) / total_curr_ma; flash_node->prgm_current2 = (flash_node->prgm_current2 * max_curr_avail_ma) / total_curr_ma; } val = (u8)(flash_node->prgm_current * FLASH_MAX_LEVEL / flash_node->max_current); rc = qpnp_led_masked_write(led, led->current_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Current register write failed\n"); goto exit_flash_led_work; } val = (u8)(flash_node->prgm_current2 * FLASH_MAX_LEVEL / flash_node->max_current); rc = qpnp_led_masked_write(led, led->current2_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Current register write failed\n"); goto exit_flash_led_work; } } else { if (max_curr_avail_ma < flash_node->prgm_current) { dev_err(&led->pdev->dev, "battery only supprots %d mA\n", max_curr_avail_ma); flash_node->prgm_current = (u16)max_curr_avail_ma; } val = (u8)(flash_node->prgm_current * FLASH_MAX_LEVEL / flash_node->max_current); if (flash_node->id == FLASH_LED_0) { rc = qpnp_led_masked_write( led, led->current_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "current reg write failed\n"); goto exit_flash_led_work; } } else if (flash_node->id == FLASH_LED_1) { rc = qpnp_led_masked_write( led, led->current2_addr, FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "current reg write failed\n"); goto exit_flash_led_work; } } } val = (u8)((flash_node->duration - FLASH_DURATION_DIVIDER) / FLASH_DURATION_DIVIDER); rc = qpnp_led_masked_write(led, FLASH_SAFETY_TIMER(led->base), FLASH_SAFETY_TIMER_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Safety timer reg write failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, FLASH_MAX_CURRENT(led->base), FLASH_CURRENT_MASK, FLASH_MAX_LEVEL); if (rc) { dev_err(&led->pdev->dev, "Max current reg write failed\n"); goto exit_flash_led_work; } if (!led->charging_enabled) { rc = qpnp_led_masked_write(led, FLASH_MODULE_ENABLE_CTRL(led->base), FLASH_MODULE_ENABLE, FLASH_MODULE_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Module enable reg write failed\n"); goto exit_flash_led_work; } usleep_range(FLASH_RAMP_UP_DELAY_US_MIN, FLASH_RAMP_UP_DELAY_US_MAX); } if (led->revid_data->pmic_subtype == PMI8996_SUBTYPE && !led->revid_data->rev3) { rc = power_supply_set_property(led->battery_psy, POWER_SUPPLY_PROP_FLASH_TRIGGER, &psy_prop); if (rc) { dev_err(&led->pdev->dev, "Failed to disable charger i/p curr limit\n"); goto exit_flash_led_work; } } if (led->pdata->hdrm_sns_ch0_en || led->pdata->hdrm_sns_ch1_en) { if (flash_node->id == FLASH_LED_SWITCH) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL0(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, (flash_node->trigger & FLASH_LED0_TRIGGER ? FLASH_LED_HDRM_SNS_ENABLE : FLASH_LED_HDRM_SNS_DISABLE)); if (rc) { dev_err(&led->pdev->dev, "Headroom sense enable failed\n"); goto exit_flash_led_work; } rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL1(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, (flash_node->trigger & FLASH_LED1_TRIGGER ? FLASH_LED_HDRM_SNS_ENABLE : FLASH_LED_HDRM_SNS_DISABLE)); if (rc) { dev_err(&led->pdev->dev, "Headroom sense enable failed\n"); goto exit_flash_led_work; } } else if (flash_node->id == FLASH_LED_0) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL0(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, FLASH_LED_HDRM_SNS_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense disable failed\n"); goto exit_flash_led_work; } } else if (flash_node->id == FLASH_LED_1) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL1(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, FLASH_LED_HDRM_SNS_ENABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense disable failed\n"); goto exit_flash_led_work; } } } rc = qpnp_led_masked_write(led, FLASH_LED_STROBE_CTRL(led->base), (flash_node->id == FLASH_LED_SWITCH ? FLASH_STROBE_MASK | FLASH_LED_STROBE_TYPE_HW : flash_node->trigger | FLASH_LED_STROBE_TYPE_HW), flash_node->trigger); if (rc) { dev_err(&led->pdev->dev, "Strobe reg write failed\n"); goto exit_flash_led_work; } if (led->strobe_debug && led->dbg_feature_en) { udelay(2000); rc = regmap_read(led->regmap, FLASH_LED_FAULT_STATUS(led->base), &temp); if (rc) { dev_err(&led->pdev->dev, "Unable to read from addr= %x, rc(%d)\n", FLASH_LED_FAULT_STATUS(led->base), rc); goto exit_flash_led_work; } led->fault_reg = temp; } } else { pr_err("Both Torch and Flash cannot be select at same time\n"); for (i = 0; i < led->num_leds; i++) led->flash_node[i].flash_on = false; goto turn_off; } flash_node->flash_on = true; mutex_unlock(&led->flash_led_lock); return; turn_off: if (led->flash_node[led->num_leds - 1].id == FLASH_LED_SWITCH && flash_node->id != FLASH_LED_SWITCH) led->flash_node[led->num_leds - 1].trigger &= ~(0x80 >> flash_node->id); if (flash_node->type == TORCH) { /* * Checking LED fault status detects hardware open fault. * If fault occurs, all subsequent LED enablement requests * will be rejected to protect hardware. */ rc = regmap_read(led->regmap, FLASH_LED_FAULT_STATUS(led->base), &temp); if (rc) { dev_err(&led->pdev->dev, "Failed to read out fault status register\n"); goto exit_flash_led_work; } led->open_fault |= (val & FLASH_LED_OPEN_FAULT_DETECTED); } rc = qpnp_led_masked_write(led, FLASH_LED_STROBE_CTRL(led->base), (flash_node->id == FLASH_LED_SWITCH ? FLASH_STROBE_MASK | FLASH_LED_STROBE_TYPE_HW : flash_node->trigger | FLASH_LED_STROBE_TYPE_HW), FLASH_LED_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Strobe disable failed\n"); goto exit_flash_led_work; } usleep_range(FLASH_RAMP_DN_DELAY_US_MIN, FLASH_RAMP_DN_DELAY_US_MAX); exit_flash_hdrm_sns: if (led->pdata->hdrm_sns_ch0_en) { if (flash_node->id == FLASH_LED_0 || flash_node->id == FLASH_LED_SWITCH) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL0(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, FLASH_LED_HDRM_SNS_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense disable failed\n"); goto exit_flash_hdrm_sns; } } } if (led->pdata->hdrm_sns_ch1_en) { if (flash_node->id == FLASH_LED_1 || flash_node->id == FLASH_LED_SWITCH) { rc = qpnp_led_masked_write(led, FLASH_HDRM_SNS_ENABLE_CTRL1(led->base), FLASH_LED_HDRM_SNS_ENABLE_MASK, FLASH_LED_HDRM_SNS_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Headroom sense disable failed\n"); goto exit_flash_hdrm_sns; } } } exit_flash_led_work: rc = qpnp_flash_led_module_disable(led, flash_node); if (rc) { dev_err(&led->pdev->dev, "Module disable failed\n"); goto exit_flash_led_work; } error_enable_gpio: if (flash_node->flash_on && flash_node->num_regulators > 0) flash_regulator_enable(led, flash_node, false); flash_node->flash_on = false; mutex_unlock(&led->flash_led_lock); return; } static void qpnp_flash_led_brightness_set(struct led_classdev *led_cdev, enum led_brightness value) { struct flash_node_data *flash_node; struct qpnp_flash_led *led; flash_node = container_of(led_cdev, struct flash_node_data, cdev); led = dev_get_drvdata(&flash_node->pdev->dev); if (value < LED_OFF) { pr_err("Invalid brightness value\n"); return; } if (value > flash_node->cdev.max_brightness) value = flash_node->cdev.max_brightness; flash_node->cdev.brightness = value; if (led->flash_node[led->num_leds - 1].id == FLASH_LED_SWITCH) { if (flash_node->type == TORCH) led->flash_node[led->num_leds - 1].type = TORCH; else if (flash_node->type == FLASH) led->flash_node[led->num_leds - 1].type = FLASH; led->flash_node[led->num_leds - 1].max_current = flash_node->max_current; if (flash_node->id == FLASH_LED_0 || flash_node->id == FLASH_LED_1) { if (value < FLASH_LED_MIN_CURRENT_MA && value != 0) value = FLASH_LED_MIN_CURRENT_MA; flash_node->prgm_current = value; flash_node->flash_on = value ? true : false; } else if (flash_node->id == FLASH_LED_SWITCH) { if (!value) { flash_node->prgm_current = 0; flash_node->prgm_current2 = 0; } } } else { if (value < FLASH_LED_MIN_CURRENT_MA && value != 0) value = FLASH_LED_MIN_CURRENT_MA; flash_node->prgm_current = value; } queue_work(led->ordered_workq, &flash_node->work); return; } static int qpnp_flash_led_init_settings(struct qpnp_flash_led *led) { int rc; u8 val, temp_val; uint val_int; rc = qpnp_led_masked_write(led, FLASH_MODULE_ENABLE_CTRL(led->base), FLASH_MODULE_ENABLE_MASK, FLASH_LED_MODULE_CTRL_DEFAULT); if (rc) { dev_err(&led->pdev->dev, "Module disable failed\n"); return rc; } rc = qpnp_led_masked_write(led, FLASH_LED_STROBE_CTRL(led->base), FLASH_STROBE_MASK, FLASH_LED_DISABLE); if (rc) { dev_err(&led->pdev->dev, "Strobe disable failed\n"); return rc; } rc = qpnp_led_masked_write(led, FLASH_LED_TMR_CTRL(led->base), FLASH_TMR_MASK, FLASH_TMR_SAFETY); if (rc) { dev_err(&led->pdev->dev, "LED timer ctrl reg write failed(%d)\n", rc); return rc; } val = (u8)(led->pdata->headroom / FLASH_LED_HEADROOM_DIVIDER - FLASH_LED_HEADROOM_OFFSET); rc = qpnp_led_masked_write(led, FLASH_HEADROOM(led->base), FLASH_HEADROOM_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Headroom reg write failed\n"); return rc; } val = qpnp_flash_led_get_startup_dly(led->pdata->startup_dly); rc = qpnp_led_masked_write(led, FLASH_STARTUP_DELAY(led->base), FLASH_STARTUP_DLY_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Startup delay reg write failed\n"); return rc; } val = (u8)(led->pdata->clamp_current * FLASH_MAX_LEVEL / FLASH_LED_MAX_CURRENT_MA); rc = qpnp_led_masked_write(led, FLASH_CLAMP_CURRENT(led->base), FLASH_CURRENT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Clamp current reg write failed\n"); return rc; } if (led->pdata->pmic_charger_support) val = FLASH_LED_FLASH_HW_VREG_OK; else val = FLASH_LED_FLASH_SW_VREG_OK; rc = qpnp_led_masked_write(led, FLASH_VREG_OK_FORCE(led->base), FLASH_VREG_OK_FORCE_MASK, val); if (rc) { dev_err(&led->pdev->dev, "VREG OK force reg write failed\n"); return rc; } if (led->pdata->self_check_en) val = FLASH_MODULE_ENABLE; else val = FLASH_LED_DISABLE; rc = qpnp_led_masked_write(led, FLASH_FAULT_DETECT(led->base), FLASH_FAULT_DETECT_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Fault detect reg write failed\n"); return rc; } val = 0x0; val |= led->pdata->mask3_en << FLASH_LED_MASK3_ENABLE_SHIFT; val |= FLASH_LED_MASK_MODULE_MASK2_ENABLE; rc = qpnp_led_masked_write(led, FLASH_MASK_ENABLE(led->base), FLASH_MASK_MODULE_CONTRL_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Mask module enable failed\n"); return rc; } rc = regmap_read(led->regmap, FLASH_PERPH_RESET_CTRL(led->base), &val_int); if (rc) { dev_err(&led->pdev->dev, "Unable to read from address %x, rc(%d)\n", FLASH_PERPH_RESET_CTRL(led->base), rc); return -EINVAL; } val = (u8)val_int; if (led->pdata->follow_rb_disable) { rc = qpnp_led_masked_write(led, FLASH_LED_UNLOCK_SECURE(led->base), FLASH_SECURE_MASK, FLASH_UNLOCK_SECURE); if (rc) { dev_err(&led->pdev->dev, "Secure reg write failed\n"); return -EINVAL; } val |= FLASH_FOLLOW_OTST2_RB_MASK; rc = qpnp_led_masked_write(led, FLASH_PERPH_RESET_CTRL(led->base), FLASH_FOLLOW_OTST2_RB_MASK, val); if (rc) { dev_err(&led->pdev->dev, "failed to reset OTST2_RB bit\n"); return rc; } } else { rc = qpnp_led_masked_write(led, FLASH_LED_UNLOCK_SECURE(led->base), FLASH_SECURE_MASK, FLASH_UNLOCK_SECURE); if (rc) { dev_err(&led->pdev->dev, "Secure reg write failed\n"); return -EINVAL; } val &= ~FLASH_FOLLOW_OTST2_RB_MASK; rc = qpnp_led_masked_write(led, FLASH_PERPH_RESET_CTRL(led->base), FLASH_FOLLOW_OTST2_RB_MASK, val); if (rc) { dev_err(&led->pdev->dev, "failed to reset OTST2_RB bit\n"); return rc; } } if (!led->pdata->thermal_derate_en) val = 0x0; else { val = led->pdata->thermal_derate_en << 7; val |= led->pdata->thermal_derate_rate << 3; val |= (led->pdata->thermal_derate_threshold - FLASH_LED_THERMAL_THRESHOLD_MIN) / FLASH_LED_THERMAL_DEVIDER; } rc = qpnp_led_masked_write(led, FLASH_THERMAL_DRATE(led->base), FLASH_THERMAL_DERATE_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Thermal derate reg write failed\n"); return rc; } if (!led->pdata->current_ramp_en) val = 0x0; else { val = led->pdata->current_ramp_en << 7; val |= led->pdata->ramp_up_step << 3; val |= led->pdata->ramp_dn_step; } rc = qpnp_led_masked_write(led, FLASH_CURRENT_RAMP(led->base), FLASH_CURRENT_RAMP_MASK, val); if (rc) { dev_err(&led->pdev->dev, "Current ramp reg write failed\n"); return rc; } if (!led->pdata->vph_pwr_droop_en) val = 0x0; else { val = led->pdata->vph_pwr_droop_en << 7; val |= ((led->pdata->vph_pwr_droop_threshold - FLASH_LED_VPH_DROOP_THRESHOLD_MIN_MV) / FLASH_LED_VPH_DROOP_THRESHOLD_DIVIDER) << 4; temp_val = qpnp_flash_led_get_droop_debounce_time( led->pdata->vph_pwr_droop_debounce_time); if (temp_val == 0xFF) { dev_err(&led->pdev->dev, "Invalid debounce time\n"); return temp_val; } val |= temp_val; } rc = qpnp_led_masked_write(led, FLASH_VPH_PWR_DROOP(led->base), FLASH_VPH_PWR_DROOP_MASK, val); if (rc) { dev_err(&led->pdev->dev, "VPH PWR droop reg write failed\n"); return rc; } led->battery_psy = power_supply_get_by_name("battery"); if (!led->battery_psy) { dev_err(&led->pdev->dev, "Failed to get battery power supply\n"); return -EINVAL; } return 0; } static int qpnp_flash_led_parse_each_led_dt(struct qpnp_flash_led *led, struct flash_node_data *flash_node) { const char *temp_string; struct device_node *node = flash_node->cdev.dev->of_node; struct device_node *temp = NULL; int rc = 0, num_regs = 0; u32 val; rc = of_property_read_string(node, "label", &temp_string); if (!rc) { if (strcmp(temp_string, "flash") == 0) flash_node->type = FLASH; else if (strcmp(temp_string, "torch") == 0) flash_node->type = TORCH; else if (strcmp(temp_string, "switch") == 0) flash_node->type = SWITCH; else { dev_err(&led->pdev->dev, "Wrong flash LED type\n"); return -EINVAL; } } else if (rc < 0) { dev_err(&led->pdev->dev, "Unable to read flash type\n"); return rc; } rc = of_property_read_u32(node, "qcom,current", &val); if (!rc) { if (val < FLASH_LED_MIN_CURRENT_MA) val = FLASH_LED_MIN_CURRENT_MA; flash_node->prgm_current = val; } else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read current\n"); return rc; } rc = of_property_read_u32(node, "qcom,id", &val); if (!rc) flash_node->id = (u8)val; else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read led ID\n"); return rc; } if (flash_node->type == SWITCH || flash_node->type == FLASH) { rc = of_property_read_u32(node, "qcom,duration", &val); if (!rc) flash_node->duration = (u16)val; else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read duration\n"); return rc; } } switch (led->peripheral_type) { case FLASH_SUBTYPE_SINGLE: flash_node->trigger = FLASH_LED0_TRIGGER; break; case FLASH_SUBTYPE_DUAL: if (flash_node->id == FLASH_LED_0) flash_node->trigger = FLASH_LED0_TRIGGER; else if (flash_node->id == FLASH_LED_1) flash_node->trigger = FLASH_LED1_TRIGGER; break; default: dev_err(&led->pdev->dev, "Invalid peripheral type\n"); } while ((temp = of_get_next_child(node, temp))) { if (of_find_property(temp, "regulator-name", NULL)) num_regs++; } if (num_regs) flash_node->num_regulators = num_regs; return rc; } static int qpnp_flash_led_parse_common_dt( struct qpnp_flash_led *led, struct device_node *node) { int rc; u32 val, temp_val; const char *temp; led->pdata->headroom = FLASH_LED_HEADROOM_DEFAULT_MV; rc = of_property_read_u32(node, "qcom,headroom", &val); if (!rc) led->pdata->headroom = (u16)val; else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read headroom\n"); return rc; } led->pdata->startup_dly = FLASH_LED_STARTUP_DELAY_DEFAULT_US; rc = of_property_read_u32(node, "qcom,startup-dly", &val); if (!rc) led->pdata->startup_dly = (u8)val; else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read startup delay\n"); return rc; } led->pdata->clamp_current = FLASH_LED_CLAMP_CURRENT_DEFAULT_MA; rc = of_property_read_u32(node, "qcom,clamp-current", &val); if (!rc) { if (val < FLASH_LED_MIN_CURRENT_MA) val = FLASH_LED_MIN_CURRENT_MA; led->pdata->clamp_current = (u16)val; } else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read clamp current\n"); return rc; } led->pdata->pmic_charger_support = of_property_read_bool(node, "qcom,pmic-charger-support"); led->pdata->self_check_en = of_property_read_bool(node, "qcom,self-check-enabled"); led->pdata->thermal_derate_en = of_property_read_bool(node, "qcom,thermal-derate-enabled"); if (led->pdata->thermal_derate_en) { led->pdata->thermal_derate_rate = FLASH_LED_THERMAL_DERATE_RATE_DEFAULT_PERCENT; rc = of_property_read_string(node, "qcom,thermal-derate-rate", &temp); if (!rc) { temp_val = qpnp_flash_led_get_thermal_derate_rate(temp); if (temp_val < 0) { dev_err(&led->pdev->dev, "Invalid thermal derate rate\n"); return -EINVAL; } led->pdata->thermal_derate_rate = (u8)temp_val; } else { dev_err(&led->pdev->dev, "Unable to read thermal derate rate\n"); return -EINVAL; } led->pdata->thermal_derate_threshold = FLASH_LED_THERMAL_DERATE_THRESHOLD_DEFAULT_C; rc = of_property_read_u32(node, "qcom,thermal-derate-threshold", &val); if (!rc) led->pdata->thermal_derate_threshold = (u8)val; else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read thermal derate threshold\n"); return rc; } } led->pdata->current_ramp_en = of_property_read_bool(node, "qcom,current-ramp-enabled"); if (led->pdata->current_ramp_en) { led->pdata->ramp_up_step = FLASH_LED_RAMP_UP_STEP_DEFAULT_US; rc = of_property_read_string(node, "qcom,ramp_up_step", &temp); if (!rc) { temp_val = qpnp_flash_led_get_ramp_step(temp); if (temp_val < 0) { dev_err(&led->pdev->dev, "Invalid ramp up step values\n"); return -EINVAL; } led->pdata->ramp_up_step = (u8)temp_val; } else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read ramp up steps\n"); return rc; } led->pdata->ramp_dn_step = FLASH_LED_RAMP_DN_STEP_DEFAULT_US; rc = of_property_read_string(node, "qcom,ramp_dn_step", &temp); if (!rc) { temp_val = qpnp_flash_led_get_ramp_step(temp); if (temp_val < 0) { dev_err(&led->pdev->dev, "Invalid ramp down step values\n"); return rc; } led->pdata->ramp_dn_step = (u8)temp_val; } else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read ramp down steps\n"); return rc; } } led->pdata->vph_pwr_droop_en = of_property_read_bool(node, "qcom,vph-pwr-droop-enabled"); if (led->pdata->vph_pwr_droop_en) { led->pdata->vph_pwr_droop_threshold = FLASH_LED_VPH_PWR_DROOP_THRESHOLD_DEFAULT_MV; rc = of_property_read_u32(node, "qcom,vph-pwr-droop-threshold", &val); if (!rc) { led->pdata->vph_pwr_droop_threshold = (u16)val; } else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read VPH PWR droop threshold\n"); return rc; } led->pdata->vph_pwr_droop_debounce_time = FLASH_LED_VPH_PWR_DROOP_DEBOUNCE_TIME_DEFAULT_US; rc = of_property_read_u32(node, "qcom,vph-pwr-droop-debounce-time", &val); if (!rc) led->pdata->vph_pwr_droop_debounce_time = (u8)val; else if (rc != -EINVAL) { dev_err(&led->pdev->dev, "Unable to read VPH PWR droop debounce time\n"); return rc; } } led->pdata->hdrm_sns_ch0_en = of_property_read_bool(node, "qcom,headroom-sense-ch0-enabled"); led->pdata->hdrm_sns_ch1_en = of_property_read_bool(node, "qcom,headroom-sense-ch1-enabled"); led->pdata->power_detect_en = of_property_read_bool(node, "qcom,power-detect-enabled"); led->pdata->mask3_en = of_property_read_bool(node, "qcom,otst2-module-enabled"); led->pdata->follow_rb_disable = of_property_read_bool(node, "qcom,follow-otst2-rb-disabled"); led->pdata->die_current_derate_en = of_property_read_bool(node, "qcom,die-current-derate-enabled"); if (led->pdata->die_current_derate_en) { led->vadc_dev = qpnp_get_vadc(&led->pdev->dev, "die-temp"); if (IS_ERR(led->vadc_dev)) { pr_err("VADC channel property Missing\n"); return -EINVAL; } if (of_find_property(node, "qcom,die-temp-threshold", &led->pdata->temp_threshold_num)) { if (led->pdata->temp_threshold_num > 0) { led->pdata->die_temp_threshold_degc = devm_kzalloc(&led->pdev->dev, led->pdata->temp_threshold_num, GFP_KERNEL); if (led->pdata->die_temp_threshold_degc == NULL) { dev_err(&led->pdev->dev, "failed to allocate die temp array\n"); return -ENOMEM; } led->pdata->temp_threshold_num /= sizeof(unsigned int); rc = of_property_read_u32_array(node, "qcom,die-temp-threshold", led->pdata->die_temp_threshold_degc, led->pdata->temp_threshold_num); if (rc) { dev_err(&led->pdev->dev, "couldn't read temp threshold rc=%d\n", rc); return rc; } } } if (of_find_property(node, "qcom,die-temp-derate-current", &led->pdata->temp_derate_curr_num)) { if (led->pdata->temp_derate_curr_num > 0) { led->pdata->die_temp_derate_curr_ma = devm_kzalloc(&led->pdev->dev, led->pdata->temp_derate_curr_num, GFP_KERNEL); if (led->pdata->die_temp_derate_curr_ma == NULL) { dev_err(&led->pdev->dev, "failed to allocate die derate current array\n"); return -ENOMEM; } led->pdata->temp_derate_curr_num /= sizeof(unsigned int); rc = of_property_read_u32_array(node, "qcom,die-temp-derate-current", led->pdata->die_temp_derate_curr_ma, led->pdata->temp_derate_curr_num); if (rc) { dev_err(&led->pdev->dev, "couldn't read temp limits rc =%d\n", rc); return rc; } } } if (led->pdata->temp_threshold_num != led->pdata->temp_derate_curr_num) { pr_err("Both array size are not same\n"); return -EINVAL; } } led->pinctrl = devm_pinctrl_get(&led->pdev->dev); if (IS_ERR_OR_NULL(led->pinctrl)) { dev_err(&led->pdev->dev, "Unable to acquire pinctrl\n"); led->pinctrl = NULL; return 0; } else { led->gpio_state_active = pinctrl_lookup_state(led->pinctrl, "flash_led_enable"); if (IS_ERR_OR_NULL(led->gpio_state_active)) { dev_err(&led->pdev->dev, "Can not lookup LED active state\n"); devm_pinctrl_put(led->pinctrl); led->pinctrl = NULL; return PTR_ERR(led->gpio_state_active); } led->gpio_state_suspend = pinctrl_lookup_state(led->pinctrl, "flash_led_disable"); if (IS_ERR_OR_NULL(led->gpio_state_suspend)) { dev_err(&led->pdev->dev, "Can not lookup LED disable state\n"); devm_pinctrl_put(led->pinctrl); led->pinctrl = NULL; return PTR_ERR(led->gpio_state_suspend); } } return 0; } static int qpnp_flash_led_probe(struct platform_device *pdev) { struct qpnp_flash_led *led; unsigned int base; struct device_node *node, *temp; struct dentry *root, *file; int rc, i = 0, j, num_leds = 0; u32 val; root = NULL; node = pdev->dev.of_node; if (node == NULL) { dev_info(&pdev->dev, "No flash device defined\n"); return -ENODEV; } rc = of_property_read_u32(pdev->dev.of_node, "reg", &base); if (rc < 0) { dev_err(&pdev->dev, "Couldn't find reg in node = %s rc = %d\n", pdev->dev.of_node->full_name, rc); return rc; } led = devm_kzalloc(&pdev->dev, sizeof(struct qpnp_flash_led), GFP_KERNEL); if (!led) { dev_err(&pdev->dev, "Unable to allocate memory for flash LED\n"); return -ENOMEM; } led->regmap = dev_get_regmap(pdev->dev.parent, NULL); if (!led->regmap) { dev_err(&pdev->dev, "Couldn't get parent's regmap\n"); return -EINVAL; } led->base = base; led->pdev = pdev; led->current_addr = FLASH_LED0_CURRENT(led->base); led->current2_addr = FLASH_LED1_CURRENT(led->base); led->pdata = devm_kzalloc(&pdev->dev, sizeof(struct flash_led_platform_data), GFP_KERNEL); if (!led->pdata) { dev_err(&pdev->dev, "Unable to allocate memory for platform data\n"); return -ENOMEM; } led->peripheral_type = (u8)qpnp_flash_led_get_peripheral_type(led); if (led->peripheral_type < 0) { dev_err(&pdev->dev, "Failed to get peripheral type\n"); return rc; } rc = qpnp_flash_led_parse_common_dt(led, node); if (rc) { dev_err(&pdev->dev, "Failed to get common config for flash LEDs\n"); return rc; } rc = qpnp_flash_led_init_settings(led); if (rc) { dev_err(&pdev->dev, "Failed to initialize flash LED\n"); return rc; } rc = qpnp_get_pmic_revid(led); if (rc) return rc; temp = NULL; while ((temp = of_get_next_child(node, temp))) num_leds++; if (!num_leds) return -ECHILD; led->flash_node = devm_kzalloc(&pdev->dev, (sizeof(struct flash_node_data) * num_leds), GFP_KERNEL); if (!led->flash_node) { dev_err(&pdev->dev, "Unable to allocate memory\n"); return -ENOMEM; } mutex_init(&led->flash_led_lock); led->ordered_workq = alloc_ordered_workqueue("flash_led_workqueue", 0); if (!led->ordered_workq) { dev_err(&pdev->dev, "Failed to allocate ordered workqueue\n"); return -ENOMEM; } for_each_child_of_node(node, temp) { led->flash_node[i].cdev.brightness_set = qpnp_flash_led_brightness_set; led->flash_node[i].cdev.brightness_get = qpnp_flash_led_brightness_get; led->flash_node[i].pdev = pdev; INIT_WORK(&led->flash_node[i].work, qpnp_flash_led_work); rc = of_property_read_string(temp, "qcom,led-name", &led->flash_node[i].cdev.name); if (rc < 0) { dev_err(&led->pdev->dev, "Unable to read flash name\n"); return rc; } rc = of_property_read_string(temp, "qcom,default-led-trigger", &led->flash_node[i].cdev.default_trigger); if (rc < 0) { dev_err(&led->pdev->dev, "Unable to read trigger name\n"); return rc; } rc = of_property_read_u32(temp, "qcom,max-current", &val); if (!rc) { if (val < FLASH_LED_MIN_CURRENT_MA) val = FLASH_LED_MIN_CURRENT_MA; led->flash_node[i].max_current = (u16)val; led->flash_node[i].cdev.max_brightness = val; } else { dev_err(&led->pdev->dev, "Unable to read max current\n"); return rc; } rc = led_classdev_register(&pdev->dev, &led->flash_node[i].cdev); if (rc) { dev_err(&pdev->dev, "Unable to register led\n"); goto error_led_register; } led->flash_node[i].cdev.dev->of_node = temp; rc = qpnp_flash_led_parse_each_led_dt(led, &led->flash_node[i]); if (rc) { dev_err(&pdev->dev, "Failed to parse config for each LED\n"); goto error_led_register; } if (led->flash_node[i].num_regulators) { rc = flash_regulator_parse_dt(led, &led->flash_node[i]); if (rc) { dev_err(&pdev->dev, "Unable to parse regulator data\n"); goto error_led_register; } rc = flash_regulator_setup(led, &led->flash_node[i], true); if (rc) { dev_err(&pdev->dev, "Unable to set up regulator\n"); goto error_led_register; } } for (j = 0; j < ARRAY_SIZE(qpnp_flash_led_attrs); j++) { rc = sysfs_create_file(&led->flash_node[i].cdev.dev->kobj, &qpnp_flash_led_attrs[j].attr); if (rc) goto error_led_register; } i++; } led->num_leds = i; root = debugfs_create_dir("flashLED", NULL); if (IS_ERR_OR_NULL(root)) { pr_err("Error creating top level directory err%ld", (long)root); if (PTR_ERR(root) == -ENODEV) pr_err("debugfs is not enabled in kernel"); goto error_led_debugfs; } led->dbgfs_root = root; file = debugfs_create_file("enable_debug", S_IRUSR | S_IWUSR, root, led, &flash_led_dfs_dbg_feature_fops); if (!file) { pr_err("error creating 'enable_debug' entry\n"); goto error_led_debugfs; } file = debugfs_create_file("latched", S_IRUSR | S_IWUSR, root, led, &flash_led_dfs_latched_reg_fops); if (!file) { pr_err("error creating 'latched' entry\n"); goto error_led_debugfs; } file = debugfs_create_file("strobe", S_IRUSR | S_IWUSR, root, led, &flash_led_dfs_strobe_reg_fops); if (!file) { pr_err("error creating 'strobe' entry\n"); goto error_led_debugfs; } dev_set_drvdata(&pdev->dev, led); return 0; error_led_debugfs: i = led->num_leds - 1; j = ARRAY_SIZE(qpnp_flash_led_attrs) - 1; error_led_register: for (; i >= 0; i--) { for (; j >= 0; j--) sysfs_remove_file(&led->flash_node[i].cdev.dev->kobj, &qpnp_flash_led_attrs[j].attr); j = ARRAY_SIZE(qpnp_flash_led_attrs) - 1; led_classdev_unregister(&led->flash_node[i].cdev); } debugfs_remove_recursive(root); mutex_destroy(&led->flash_led_lock); destroy_workqueue(led->ordered_workq); return rc; } static int qpnp_flash_led_remove(struct platform_device *pdev) { struct qpnp_flash_led *led = dev_get_drvdata(&pdev->dev); int i, j; for (i = led->num_leds - 1; i >= 0; i--) { if (led->flash_node[i].reg_data) { if (led->flash_node[i].flash_on) flash_regulator_enable(led, &led->flash_node[i], false); flash_regulator_setup(led, &led->flash_node[i], false); } for (j = 0; j < ARRAY_SIZE(qpnp_flash_led_attrs); j++) sysfs_remove_file(&led->flash_node[i].cdev.dev->kobj, &qpnp_flash_led_attrs[j].attr); led_classdev_unregister(&led->flash_node[i].cdev); } debugfs_remove_recursive(led->dbgfs_root); mutex_destroy(&led->flash_led_lock); destroy_workqueue(led->ordered_workq); return 0; } static struct of_device_id spmi_match_table[] = { { .compatible = "qcom,qpnp-flash-led",}, { }, }; static struct platform_driver qpnp_flash_led_driver = { .driver = { .name = "qcom,qpnp-flash-led", .of_match_table = spmi_match_table, }, .probe = qpnp_flash_led_probe, .remove = qpnp_flash_led_remove, }; static int __init qpnp_flash_led_init(void) { return platform_driver_register(&qpnp_flash_led_driver); } late_initcall(qpnp_flash_led_init); static void __exit qpnp_flash_led_exit(void) { platform_driver_unregister(&qpnp_flash_led_driver); } module_exit(qpnp_flash_led_exit); MODULE_DESCRIPTION("QPNP Flash LED driver"); MODULE_LICENSE("GPL v2"); MODULE_ALIAS("leds:leds-qpnp-flash");