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- // SPDX-License-Identifier: GPL-2.0-only
- /* Copyright (c) 2015, Sony Mobile Communications, AB.
- */
- #include <linux/delay.h>
- #include <linux/interrupt.h>
- #include <linux/ktime.h>
- #include <linux/kernel.h>
- #include <linux/backlight.h>
- #include <linux/module.h>
- #include <linux/of.h>
- #include <linux/of_device.h>
- #include <linux/of_address.h>
- #include <linux/regmap.h>
- /* From DT binding */
- #define WLED_MAX_STRINGS 4
- #define MOD_A 0
- #define MOD_B 1
- #define WLED_DEFAULT_BRIGHTNESS 2048
- #define WLED_SOFT_START_DLY_US 10000
- #define WLED3_SINK_REG_BRIGHT_MAX 0xFFF
- #define WLED5_SINK_REG_BRIGHT_MAX_12B 0xFFF
- #define WLED5_SINK_REG_BRIGHT_MAX_15B 0x7FFF
- /* WLED3/WLED4 control registers */
- #define WLED3_CTRL_REG_FAULT_STATUS 0x08
- #define WLED3_CTRL_REG_ILIM_FAULT_BIT BIT(0)
- #define WLED3_CTRL_REG_OVP_FAULT_BIT BIT(1)
- #define WLED4_CTRL_REG_SC_FAULT_BIT BIT(2)
- #define WLED5_CTRL_REG_OVP_PRE_ALARM_BIT BIT(4)
- #define WLED3_CTRL_REG_INT_RT_STS 0x10
- #define WLED3_CTRL_REG_OVP_FAULT_STATUS BIT(1)
- #define WLED3_CTRL_REG_MOD_EN 0x46
- #define WLED3_CTRL_REG_MOD_EN_MASK BIT(7)
- #define WLED3_CTRL_REG_MOD_EN_SHIFT 7
- #define WLED3_CTRL_REG_FEEDBACK_CONTROL 0x48
- #define WLED3_CTRL_REG_FREQ 0x4c
- #define WLED3_CTRL_REG_FREQ_MASK GENMASK(3, 0)
- #define WLED3_CTRL_REG_OVP 0x4d
- #define WLED3_CTRL_REG_OVP_MASK GENMASK(1, 0)
- #define WLED5_CTRL_REG_OVP_MASK GENMASK(3, 0)
- #define WLED3_CTRL_REG_ILIMIT 0x4e
- #define WLED3_CTRL_REG_ILIMIT_MASK GENMASK(2, 0)
- /* WLED3/WLED4 sink registers */
- #define WLED3_SINK_REG_SYNC 0x47
- #define WLED3_SINK_REG_SYNC_CLEAR 0x00
- #define WLED3_SINK_REG_CURR_SINK 0x4f
- #define WLED3_SINK_REG_CURR_SINK_MASK GENMASK(7, 5)
- #define WLED3_SINK_REG_CURR_SINK_SHFT 5
- /* WLED3 specific per-'string' registers below */
- #define WLED3_SINK_REG_BRIGHT(n) (0x40 + n)
- #define WLED3_SINK_REG_STR_MOD_EN(n) (0x60 + (n * 0x10))
- #define WLED3_SINK_REG_STR_MOD_MASK BIT(7)
- #define WLED3_SINK_REG_STR_FULL_SCALE_CURR(n) (0x62 + (n * 0x10))
- #define WLED3_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(4, 0)
- #define WLED3_SINK_REG_STR_MOD_SRC(n) (0x63 + (n * 0x10))
- #define WLED3_SINK_REG_STR_MOD_SRC_MASK BIT(0)
- #define WLED3_SINK_REG_STR_MOD_SRC_INT 0x00
- #define WLED3_SINK_REG_STR_MOD_SRC_EXT 0x01
- #define WLED3_SINK_REG_STR_CABC(n) (0x66 + (n * 0x10))
- #define WLED3_SINK_REG_STR_CABC_MASK BIT(7)
- /* WLED4 specific control registers */
- #define WLED4_CTRL_REG_SHORT_PROTECT 0x5e
- #define WLED4_CTRL_REG_SHORT_EN_MASK BIT(7)
- #define WLED4_CTRL_REG_SEC_ACCESS 0xd0
- #define WLED4_CTRL_REG_SEC_UNLOCK 0xa5
- #define WLED4_CTRL_REG_TEST1 0xe2
- #define WLED4_CTRL_REG_TEST1_EXT_FET_DTEST2 0x09
- /* WLED4 specific sink registers */
- #define WLED4_SINK_REG_CURR_SINK 0x46
- #define WLED4_SINK_REG_CURR_SINK_MASK GENMASK(7, 4)
- #define WLED4_SINK_REG_CURR_SINK_SHFT 4
- /* WLED4 specific per-'string' registers below */
- #define WLED4_SINK_REG_STR_MOD_EN(n) (0x50 + (n * 0x10))
- #define WLED4_SINK_REG_STR_MOD_MASK BIT(7)
- #define WLED4_SINK_REG_STR_FULL_SCALE_CURR(n) (0x52 + (n * 0x10))
- #define WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK GENMASK(3, 0)
- #define WLED4_SINK_REG_STR_MOD_SRC(n) (0x53 + (n * 0x10))
- #define WLED4_SINK_REG_STR_MOD_SRC_MASK BIT(0)
- #define WLED4_SINK_REG_STR_MOD_SRC_INT 0x00
- #define WLED4_SINK_REG_STR_MOD_SRC_EXT 0x01
- #define WLED4_SINK_REG_STR_CABC(n) (0x56 + (n * 0x10))
- #define WLED4_SINK_REG_STR_CABC_MASK BIT(7)
- #define WLED4_SINK_REG_BRIGHT(n) (0x57 + (n * 0x10))
- /* WLED5 specific control registers */
- #define WLED5_CTRL_REG_OVP_INT_CTL 0x5f
- #define WLED5_CTRL_REG_OVP_INT_TIMER_MASK GENMASK(2, 0)
- /* WLED5 specific sink registers */
- #define WLED5_SINK_REG_MOD_A_EN 0x50
- #define WLED5_SINK_REG_MOD_B_EN 0x60
- #define WLED5_SINK_REG_MOD_EN_MASK BIT(7)
- #define WLED5_SINK_REG_MOD_A_SRC_SEL 0x51
- #define WLED5_SINK_REG_MOD_B_SRC_SEL 0x61
- #define WLED5_SINK_REG_MOD_SRC_SEL_HIGH 0
- #define WLED5_SINK_REG_MOD_SRC_SEL_EXT 0x03
- #define WLED5_SINK_REG_MOD_SRC_SEL_MASK GENMASK(1, 0)
- #define WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL 0x52
- #define WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL 0x62
- #define WLED5_SINK_REG_BRIGHTNESS_WIDTH_12B 0
- #define WLED5_SINK_REG_BRIGHTNESS_WIDTH_15B 1
- #define WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB 0x53
- #define WLED5_SINK_REG_MOD_A_BRIGHTNESS_MSB 0x54
- #define WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB 0x63
- #define WLED5_SINK_REG_MOD_B_BRIGHTNESS_MSB 0x64
- #define WLED5_SINK_REG_MOD_SYNC_BIT 0x65
- #define WLED5_SINK_REG_SYNC_MOD_A_BIT BIT(0)
- #define WLED5_SINK_REG_SYNC_MOD_B_BIT BIT(1)
- #define WLED5_SINK_REG_SYNC_MASK GENMASK(1, 0)
- /* WLED5 specific per-'string' registers below */
- #define WLED5_SINK_REG_STR_FULL_SCALE_CURR(n) (0x72 + (n * 0x10))
- #define WLED5_SINK_REG_STR_SRC_SEL(n) (0x73 + (n * 0x10))
- #define WLED5_SINK_REG_SRC_SEL_MOD_A 0
- #define WLED5_SINK_REG_SRC_SEL_MOD_B 1
- #define WLED5_SINK_REG_SRC_SEL_MASK GENMASK(1, 0)
- struct wled_var_cfg {
- const u32 *values;
- u32 (*fn)(u32);
- int size;
- };
- struct wled_u32_opts {
- const char *name;
- u32 *val_ptr;
- const struct wled_var_cfg *cfg;
- };
- struct wled_bool_opts {
- const char *name;
- bool *val_ptr;
- };
- struct wled_config {
- u32 boost_i_limit;
- u32 ovp;
- u32 switch_freq;
- u32 num_strings;
- u32 string_i_limit;
- u32 enabled_strings[WLED_MAX_STRINGS];
- u32 mod_sel;
- u32 cabc_sel;
- bool cs_out_en;
- bool ext_gen;
- bool cabc;
- bool external_pfet;
- bool auto_detection_enabled;
- };
- struct wled {
- const char *name;
- struct device *dev;
- struct regmap *regmap;
- struct mutex lock; /* Lock to avoid race from thread irq handler */
- ktime_t last_short_event;
- ktime_t start_ovp_fault_time;
- u16 ctrl_addr;
- u16 sink_addr;
- u16 max_string_count;
- u16 auto_detection_ovp_count;
- u32 brightness;
- u32 max_brightness;
- u32 short_count;
- u32 auto_detect_count;
- u32 version;
- bool disabled_by_short;
- bool has_short_detect;
- bool cabc_disabled;
- int short_irq;
- int ovp_irq;
- struct wled_config cfg;
- struct delayed_work ovp_work;
- /* Configures the brightness. Applicable for wled3, wled4 and wled5 */
- int (*wled_set_brightness)(struct wled *wled, u16 brightness);
- /* Configures the cabc register. Applicable for wled4 and wled5 */
- int (*wled_cabc_config)(struct wled *wled, bool enable);
- /*
- * Toggles the sync bit for the brightness update to take place.
- * Applicable for WLED3, WLED4 and WLED5.
- */
- int (*wled_sync_toggle)(struct wled *wled);
- /*
- * Time to wait before checking the OVP status after wled module enable.
- * Applicable for WLED4 and WLED5.
- */
- int (*wled_ovp_delay)(struct wled *wled);
- /*
- * Determines if the auto string detection is required.
- * Applicable for WLED4 and WLED5
- */
- bool (*wled_auto_detection_required)(struct wled *wled);
- };
- static int wled3_set_brightness(struct wled *wled, u16 brightness)
- {
- int rc, i;
- __le16 v;
- v = cpu_to_le16(brightness & WLED3_SINK_REG_BRIGHT_MAX);
- for (i = 0; i < wled->cfg.num_strings; ++i) {
- rc = regmap_bulk_write(wled->regmap, wled->ctrl_addr +
- WLED3_SINK_REG_BRIGHT(wled->cfg.enabled_strings[i]),
- &v, sizeof(v));
- if (rc < 0)
- return rc;
- }
- return 0;
- }
- static int wled4_set_brightness(struct wled *wled, u16 brightness)
- {
- int rc, i;
- u16 low_limit = wled->max_brightness * 4 / 1000;
- __le16 v;
- /* WLED4's lower limit of operation is 0.4% */
- if (brightness > 0 && brightness < low_limit)
- brightness = low_limit;
- v = cpu_to_le16(brightness & WLED3_SINK_REG_BRIGHT_MAX);
- for (i = 0; i < wled->cfg.num_strings; ++i) {
- rc = regmap_bulk_write(wled->regmap, wled->sink_addr +
- WLED4_SINK_REG_BRIGHT(wled->cfg.enabled_strings[i]),
- &v, sizeof(v));
- if (rc < 0)
- return rc;
- }
- return 0;
- }
- static int wled5_set_brightness(struct wled *wled, u16 brightness)
- {
- int rc, offset;
- u16 low_limit = wled->max_brightness * 1 / 1000;
- __le16 v;
- /* WLED5's lower limit is 0.1% */
- if (brightness < low_limit)
- brightness = low_limit;
- v = cpu_to_le16(brightness & WLED5_SINK_REG_BRIGHT_MAX_15B);
- offset = (wled->cfg.mod_sel == MOD_A) ?
- WLED5_SINK_REG_MOD_A_BRIGHTNESS_LSB :
- WLED5_SINK_REG_MOD_B_BRIGHTNESS_LSB;
- rc = regmap_bulk_write(wled->regmap, wled->sink_addr + offset,
- &v, sizeof(v));
- return rc;
- }
- static void wled_ovp_work(struct work_struct *work)
- {
- struct wled *wled = container_of(work,
- struct wled, ovp_work.work);
- enable_irq(wled->ovp_irq);
- }
- static int wled_module_enable(struct wled *wled, int val)
- {
- int rc;
- if (wled->disabled_by_short)
- return -ENXIO;
- rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK,
- val << WLED3_CTRL_REG_MOD_EN_SHIFT);
- if (rc < 0)
- return rc;
- if (wled->ovp_irq > 0) {
- if (val) {
- /*
- * The hardware generates a storm of spurious OVP
- * interrupts during soft start operations. So defer
- * enabling the IRQ for 10ms to ensure that the
- * soft start is complete.
- */
- schedule_delayed_work(&wled->ovp_work, HZ / 100);
- } else {
- if (!cancel_delayed_work_sync(&wled->ovp_work))
- disable_irq(wled->ovp_irq);
- }
- }
- return 0;
- }
- static int wled3_sync_toggle(struct wled *wled)
- {
- int rc;
- unsigned int mask = GENMASK(wled->max_string_count - 1, 0);
- rc = regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED3_SINK_REG_SYNC,
- mask, mask);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED3_SINK_REG_SYNC,
- mask, WLED3_SINK_REG_SYNC_CLEAR);
- return rc;
- }
- static int wled5_mod_sync_toggle(struct wled *wled)
- {
- int rc;
- u8 val;
- val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_SYNC_MOD_A_BIT :
- WLED5_SINK_REG_SYNC_MOD_B_BIT;
- rc = regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT,
- WLED5_SINK_REG_SYNC_MASK, val);
- if (rc < 0)
- return rc;
- return regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED5_SINK_REG_MOD_SYNC_BIT,
- WLED5_SINK_REG_SYNC_MASK, 0);
- }
- static int wled_ovp_fault_status(struct wled *wled, bool *fault_set)
- {
- int rc;
- u32 int_rt_sts, fault_sts;
- *fault_set = false;
- rc = regmap_read(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_INT_RT_STS,
- &int_rt_sts);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to read INT_RT_STS rc=%d\n", rc);
- return rc;
- }
- rc = regmap_read(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_FAULT_STATUS,
- &fault_sts);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to read FAULT_STATUS rc=%d\n", rc);
- return rc;
- }
- if (int_rt_sts & WLED3_CTRL_REG_OVP_FAULT_STATUS)
- *fault_set = true;
- if (wled->version == 4 && (fault_sts & WLED3_CTRL_REG_OVP_FAULT_BIT))
- *fault_set = true;
- if (wled->version == 5 && (fault_sts & (WLED3_CTRL_REG_OVP_FAULT_BIT |
- WLED5_CTRL_REG_OVP_PRE_ALARM_BIT)))
- *fault_set = true;
- if (*fault_set)
- dev_dbg(wled->dev, "WLED OVP fault detected, int_rt_sts=0x%x fault_sts=0x%x\n",
- int_rt_sts, fault_sts);
- return rc;
- }
- static int wled4_ovp_delay(struct wled *wled)
- {
- return WLED_SOFT_START_DLY_US;
- }
- static int wled5_ovp_delay(struct wled *wled)
- {
- int rc, delay_us;
- u32 val;
- u8 ovp_timer_ms[8] = {1, 2, 4, 8, 12, 16, 20, 24};
- /* For WLED5, get the delay based on OVP timer */
- rc = regmap_read(wled->regmap, wled->ctrl_addr +
- WLED5_CTRL_REG_OVP_INT_CTL, &val);
- if (rc < 0)
- delay_us =
- ovp_timer_ms[val & WLED5_CTRL_REG_OVP_INT_TIMER_MASK] * 1000;
- else
- delay_us = 2 * WLED_SOFT_START_DLY_US;
- dev_dbg(wled->dev, "delay_time_us: %d\n", delay_us);
- return delay_us;
- }
- static int wled_update_status(struct backlight_device *bl)
- {
- struct wled *wled = bl_get_data(bl);
- u16 brightness = backlight_get_brightness(bl);
- int rc = 0;
- mutex_lock(&wled->lock);
- if (brightness) {
- rc = wled->wled_set_brightness(wled, brightness);
- if (rc < 0) {
- dev_err(wled->dev, "wled failed to set brightness rc:%d\n",
- rc);
- goto unlock_mutex;
- }
- if (wled->version < 5) {
- rc = wled->wled_sync_toggle(wled);
- if (rc < 0) {
- dev_err(wled->dev, "wled sync failed rc:%d\n", rc);
- goto unlock_mutex;
- }
- } else {
- /*
- * For WLED5 toggling the MOD_SYNC_BIT updates the
- * brightness
- */
- rc = wled5_mod_sync_toggle(wled);
- if (rc < 0) {
- dev_err(wled->dev, "wled mod sync failed rc:%d\n",
- rc);
- goto unlock_mutex;
- }
- }
- }
- if (!!brightness != !!wled->brightness) {
- rc = wled_module_enable(wled, !!brightness);
- if (rc < 0) {
- dev_err(wled->dev, "wled enable failed rc:%d\n", rc);
- goto unlock_mutex;
- }
- }
- wled->brightness = brightness;
- unlock_mutex:
- mutex_unlock(&wled->lock);
- return rc;
- }
- static int wled4_cabc_config(struct wled *wled, bool enable)
- {
- int i, j, rc;
- u8 val;
- for (i = 0; i < wled->cfg.num_strings; i++) {
- j = wled->cfg.enabled_strings[i];
- val = enable ? WLED4_SINK_REG_STR_CABC_MASK : 0;
- rc = regmap_update_bits(wled->regmap, wled->sink_addr +
- WLED4_SINK_REG_STR_CABC(j),
- WLED4_SINK_REG_STR_CABC_MASK, val);
- if (rc < 0)
- return rc;
- }
- return 0;
- }
- static int wled5_cabc_config(struct wled *wled, bool enable)
- {
- int rc, offset;
- u8 reg;
- if (wled->cabc_disabled)
- return 0;
- reg = enable ? wled->cfg.cabc_sel : 0;
- offset = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_MOD_A_SRC_SEL :
- WLED5_SINK_REG_MOD_B_SRC_SEL;
- rc = regmap_update_bits(wled->regmap, wled->sink_addr + offset,
- WLED5_SINK_REG_MOD_SRC_SEL_MASK, reg);
- if (rc < 0) {
- pr_err("Error in configuring CABC rc=%d\n", rc);
- return rc;
- }
- if (!wled->cfg.cabc_sel)
- wled->cabc_disabled = true;
- return 0;
- }
- #define WLED_SHORT_DLY_MS 20
- #define WLED_SHORT_CNT_MAX 5
- #define WLED_SHORT_RESET_CNT_DLY_US USEC_PER_SEC
- static irqreturn_t wled_short_irq_handler(int irq, void *_wled)
- {
- struct wled *wled = _wled;
- int rc;
- s64 elapsed_time;
- wled->short_count++;
- mutex_lock(&wled->lock);
- rc = wled_module_enable(wled, false);
- if (rc < 0) {
- dev_err(wled->dev, "wled disable failed rc:%d\n", rc);
- goto unlock_mutex;
- }
- elapsed_time = ktime_us_delta(ktime_get(),
- wled->last_short_event);
- if (elapsed_time > WLED_SHORT_RESET_CNT_DLY_US)
- wled->short_count = 1;
- if (wled->short_count > WLED_SHORT_CNT_MAX) {
- dev_err(wled->dev, "Short triggered %d times, disabling WLED forever!\n",
- wled->short_count);
- wled->disabled_by_short = true;
- goto unlock_mutex;
- }
- wled->last_short_event = ktime_get();
- msleep(WLED_SHORT_DLY_MS);
- rc = wled_module_enable(wled, true);
- if (rc < 0)
- dev_err(wled->dev, "wled enable failed rc:%d\n", rc);
- unlock_mutex:
- mutex_unlock(&wled->lock);
- return IRQ_HANDLED;
- }
- #define AUTO_DETECT_BRIGHTNESS 200
- static void wled_auto_string_detection(struct wled *wled)
- {
- int rc = 0, i, j, delay_time_us;
- u32 sink_config = 0;
- u8 sink_test = 0, sink_valid = 0, val;
- bool fault_set;
- /* Read configured sink configuration */
- rc = regmap_read(wled->regmap, wled->sink_addr +
- WLED4_SINK_REG_CURR_SINK, &sink_config);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to read SINK configuration rc=%d\n",
- rc);
- goto failed_detect;
- }
- /* Disable the module before starting detection */
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK, 0);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to disable WLED module rc=%d\n", rc);
- goto failed_detect;
- }
- /* Set low brightness across all sinks */
- rc = wled4_set_brightness(wled, AUTO_DETECT_BRIGHTNESS);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to set brightness for auto detection rc=%d\n",
- rc);
- goto failed_detect;
- }
- if (wled->cfg.cabc) {
- rc = wled->wled_cabc_config(wled, false);
- if (rc < 0)
- goto failed_detect;
- }
- /* Disable all sinks */
- rc = regmap_write(wled->regmap,
- wled->sink_addr + WLED4_SINK_REG_CURR_SINK, 0);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to disable all sinks rc=%d\n", rc);
- goto failed_detect;
- }
- /* Iterate through the strings one by one */
- for (i = 0; i < wled->cfg.num_strings; i++) {
- j = wled->cfg.enabled_strings[i];
- sink_test = BIT((WLED4_SINK_REG_CURR_SINK_SHFT + j));
- /* Enable feedback control */
- rc = regmap_write(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_FEEDBACK_CONTROL, j + 1);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to enable feedback for SINK %d rc = %d\n",
- j + 1, rc);
- goto failed_detect;
- }
- /* Enable the sink */
- rc = regmap_write(wled->regmap, wled->sink_addr +
- WLED4_SINK_REG_CURR_SINK, sink_test);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to configure SINK %d rc=%d\n",
- j + 1, rc);
- goto failed_detect;
- }
- /* Enable the module */
- rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK,
- WLED3_CTRL_REG_MOD_EN_MASK);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to enable WLED module rc=%d\n",
- rc);
- goto failed_detect;
- }
- delay_time_us = wled->wled_ovp_delay(wled);
- usleep_range(delay_time_us, delay_time_us + 1000);
- rc = wled_ovp_fault_status(wled, &fault_set);
- if (rc < 0) {
- dev_err(wled->dev, "Error in getting OVP fault_sts, rc=%d\n",
- rc);
- goto failed_detect;
- }
- if (fault_set)
- dev_dbg(wled->dev, "WLED OVP fault detected with SINK %d\n",
- j + 1);
- else
- sink_valid |= sink_test;
- /* Disable the module */
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK, 0);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to disable WLED module rc=%d\n",
- rc);
- goto failed_detect;
- }
- }
- if (!sink_valid) {
- dev_err(wled->dev, "No valid WLED sinks found\n");
- wled->disabled_by_short = true;
- goto failed_detect;
- }
- if (sink_valid != sink_config) {
- dev_warn(wled->dev, "%x is not a valid sink configuration - using %x instead\n",
- sink_config, sink_valid);
- sink_config = sink_valid;
- }
- /* Write the new sink configuration */
- rc = regmap_write(wled->regmap,
- wled->sink_addr + WLED4_SINK_REG_CURR_SINK,
- sink_config);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to reconfigure the default sink rc=%d\n",
- rc);
- goto failed_detect;
- }
- /* Enable valid sinks */
- if (wled->version == 4) {
- for (i = 0; i < wled->cfg.num_strings; i++) {
- j = wled->cfg.enabled_strings[i];
- if (sink_config &
- BIT(WLED4_SINK_REG_CURR_SINK_SHFT + j))
- val = WLED4_SINK_REG_STR_MOD_MASK;
- else
- /* Disable modulator_en for unused sink */
- val = 0;
- rc = regmap_write(wled->regmap, wled->sink_addr +
- WLED4_SINK_REG_STR_MOD_EN(j), val);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to configure MODULATOR_EN rc=%d\n",
- rc);
- goto failed_detect;
- }
- }
- }
- /* Enable CABC */
- rc = wled->wled_cabc_config(wled, true);
- if (rc < 0)
- goto failed_detect;
- /* Restore the feedback setting */
- rc = regmap_write(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_FEEDBACK_CONTROL, 0);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to restore feedback setting rc=%d\n",
- rc);
- goto failed_detect;
- }
- /* Restore brightness */
- rc = wled4_set_brightness(wled, wled->brightness);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to set brightness after auto detection rc=%d\n",
- rc);
- goto failed_detect;
- }
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK,
- WLED3_CTRL_REG_MOD_EN_MASK);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to enable WLED module rc=%d\n", rc);
- goto failed_detect;
- }
- failed_detect:
- return;
- }
- #define WLED_AUTO_DETECT_OVP_COUNT 5
- #define WLED_AUTO_DETECT_CNT_DLY_US USEC_PER_SEC
- static bool wled4_auto_detection_required(struct wled *wled)
- {
- s64 elapsed_time_us;
- if (!wled->cfg.auto_detection_enabled)
- return false;
- /*
- * Check if the OVP fault was an occasional one
- * or if it's firing continuously, the latter qualifies
- * for an auto-detection check.
- */
- if (!wled->auto_detection_ovp_count) {
- wled->start_ovp_fault_time = ktime_get();
- wled->auto_detection_ovp_count++;
- } else {
- elapsed_time_us = ktime_us_delta(ktime_get(),
- wled->start_ovp_fault_time);
- if (elapsed_time_us > WLED_AUTO_DETECT_CNT_DLY_US)
- wled->auto_detection_ovp_count = 0;
- else
- wled->auto_detection_ovp_count++;
- if (wled->auto_detection_ovp_count >=
- WLED_AUTO_DETECT_OVP_COUNT) {
- wled->auto_detection_ovp_count = 0;
- return true;
- }
- }
- return false;
- }
- static bool wled5_auto_detection_required(struct wled *wled)
- {
- if (!wled->cfg.auto_detection_enabled)
- return false;
- /*
- * Unlike WLED4, WLED5 has OVP fault density interrupt configuration
- * i.e. to count the number of OVP alarms for a certain duration before
- * triggering OVP fault interrupt. By default, number of OVP fault
- * events counted before an interrupt is fired is 32 and the time
- * interval is 12 ms. If we see one OVP fault interrupt, then that
- * should qualify for a real OVP fault condition to run auto detection
- * algorithm.
- */
- return true;
- }
- static int wled_auto_detection_at_init(struct wled *wled)
- {
- int rc;
- bool fault_set;
- if (!wled->cfg.auto_detection_enabled)
- return 0;
- rc = wled_ovp_fault_status(wled, &fault_set);
- if (rc < 0) {
- dev_err(wled->dev, "Error in getting OVP fault_sts, rc=%d\n",
- rc);
- return rc;
- }
- if (fault_set) {
- mutex_lock(&wled->lock);
- wled_auto_string_detection(wled);
- mutex_unlock(&wled->lock);
- }
- return rc;
- }
- static irqreturn_t wled_ovp_irq_handler(int irq, void *_wled)
- {
- struct wled *wled = _wled;
- int rc;
- u32 int_sts, fault_sts;
- rc = regmap_read(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_INT_RT_STS, &int_sts);
- if (rc < 0) {
- dev_err(wled->dev, "Error in reading WLED3_INT_RT_STS rc=%d\n",
- rc);
- return IRQ_HANDLED;
- }
- rc = regmap_read(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_FAULT_STATUS, &fault_sts);
- if (rc < 0) {
- dev_err(wled->dev, "Error in reading WLED_FAULT_STATUS rc=%d\n",
- rc);
- return IRQ_HANDLED;
- }
- if (fault_sts & (WLED3_CTRL_REG_OVP_FAULT_BIT |
- WLED3_CTRL_REG_ILIM_FAULT_BIT))
- dev_dbg(wled->dev, "WLED OVP fault detected, int_sts=%x fault_sts= %x\n",
- int_sts, fault_sts);
- if (fault_sts & WLED3_CTRL_REG_OVP_FAULT_BIT) {
- if (wled->wled_auto_detection_required(wled)) {
- mutex_lock(&wled->lock);
- wled_auto_string_detection(wled);
- mutex_unlock(&wled->lock);
- }
- }
- return IRQ_HANDLED;
- }
- static int wled3_setup(struct wled *wled)
- {
- u16 addr;
- u8 sink_en = 0;
- int rc, i, j;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_OVP,
- WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp);
- if (rc)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT,
- WLED3_CTRL_REG_ILIMIT_MASK,
- wled->cfg.boost_i_limit);
- if (rc)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_FREQ,
- WLED3_CTRL_REG_FREQ_MASK,
- wled->cfg.switch_freq);
- if (rc)
- return rc;
- for (i = 0; i < wled->cfg.num_strings; ++i) {
- j = wled->cfg.enabled_strings[i];
- addr = wled->ctrl_addr + WLED3_SINK_REG_STR_MOD_EN(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED3_SINK_REG_STR_MOD_MASK,
- WLED3_SINK_REG_STR_MOD_MASK);
- if (rc)
- return rc;
- if (wled->cfg.ext_gen) {
- addr = wled->ctrl_addr + WLED3_SINK_REG_STR_MOD_SRC(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED3_SINK_REG_STR_MOD_SRC_MASK,
- WLED3_SINK_REG_STR_MOD_SRC_EXT);
- if (rc)
- return rc;
- }
- addr = wled->ctrl_addr + WLED3_SINK_REG_STR_FULL_SCALE_CURR(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED3_SINK_REG_STR_FULL_SCALE_CURR_MASK,
- wled->cfg.string_i_limit);
- if (rc)
- return rc;
- addr = wled->ctrl_addr + WLED3_SINK_REG_STR_CABC(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED3_SINK_REG_STR_CABC_MASK,
- wled->cfg.cabc ?
- WLED3_SINK_REG_STR_CABC_MASK : 0);
- if (rc)
- return rc;
- sink_en |= BIT(j + WLED3_SINK_REG_CURR_SINK_SHFT);
- }
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_SINK_REG_CURR_SINK,
- WLED3_SINK_REG_CURR_SINK_MASK, sink_en);
- if (rc)
- return rc;
- return 0;
- }
- static const struct wled_config wled3_config_defaults = {
- .boost_i_limit = 3,
- .string_i_limit = 20,
- .ovp = 2,
- .num_strings = 3,
- .switch_freq = 5,
- .cs_out_en = false,
- .ext_gen = false,
- .cabc = false,
- .enabled_strings = {0, 1, 2, 3},
- };
- static int wled4_setup(struct wled *wled)
- {
- int rc, temp, i, j;
- u16 addr;
- u8 sink_en = 0;
- u32 sink_cfg;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_OVP,
- WLED3_CTRL_REG_OVP_MASK, wled->cfg.ovp);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT,
- WLED3_CTRL_REG_ILIMIT_MASK,
- wled->cfg.boost_i_limit);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_FREQ,
- WLED3_CTRL_REG_FREQ_MASK,
- wled->cfg.switch_freq);
- if (rc < 0)
- return rc;
- if (wled->cfg.external_pfet) {
- /* Unlock the secure register access */
- rc = regmap_write(wled->regmap, wled->ctrl_addr +
- WLED4_CTRL_REG_SEC_ACCESS,
- WLED4_CTRL_REG_SEC_UNLOCK);
- if (rc < 0)
- return rc;
- rc = regmap_write(wled->regmap,
- wled->ctrl_addr + WLED4_CTRL_REG_TEST1,
- WLED4_CTRL_REG_TEST1_EXT_FET_DTEST2);
- if (rc < 0)
- return rc;
- }
- rc = regmap_read(wled->regmap, wled->sink_addr +
- WLED4_SINK_REG_CURR_SINK, &sink_cfg);
- if (rc < 0)
- return rc;
- for (i = 0; i < wled->cfg.num_strings; i++) {
- j = wled->cfg.enabled_strings[i];
- temp = j + WLED4_SINK_REG_CURR_SINK_SHFT;
- sink_en |= 1 << temp;
- }
- if (sink_cfg == sink_en) {
- rc = wled_auto_detection_at_init(wled);
- return rc;
- }
- rc = regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED4_SINK_REG_CURR_SINK,
- WLED4_SINK_REG_CURR_SINK_MASK, 0);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK, 0);
- if (rc < 0)
- return rc;
- /* Per sink/string configuration */
- for (i = 0; i < wled->cfg.num_strings; i++) {
- j = wled->cfg.enabled_strings[i];
- addr = wled->sink_addr +
- WLED4_SINK_REG_STR_MOD_EN(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED4_SINK_REG_STR_MOD_MASK,
- WLED4_SINK_REG_STR_MOD_MASK);
- if (rc < 0)
- return rc;
- addr = wled->sink_addr +
- WLED4_SINK_REG_STR_FULL_SCALE_CURR(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK,
- wled->cfg.string_i_limit);
- if (rc < 0)
- return rc;
- }
- rc = wled4_cabc_config(wled, wled->cfg.cabc);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_MOD_EN,
- WLED3_CTRL_REG_MOD_EN_MASK,
- WLED3_CTRL_REG_MOD_EN_MASK);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED4_SINK_REG_CURR_SINK,
- WLED4_SINK_REG_CURR_SINK_MASK, sink_en);
- if (rc < 0)
- return rc;
- rc = wled->wled_sync_toggle(wled);
- if (rc < 0) {
- dev_err(wled->dev, "Failed to toggle sync reg rc:%d\n", rc);
- return rc;
- }
- rc = wled_auto_detection_at_init(wled);
- return rc;
- }
- static const struct wled_config wled4_config_defaults = {
- .boost_i_limit = 4,
- .string_i_limit = 10,
- .ovp = 1,
- .num_strings = 4,
- .switch_freq = 11,
- .cabc = false,
- .external_pfet = false,
- .auto_detection_enabled = false,
- };
- static int wled5_setup(struct wled *wled)
- {
- int rc, temp, i, j, offset;
- u8 sink_en = 0;
- u16 addr;
- u32 val;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_OVP,
- WLED5_CTRL_REG_OVP_MASK, wled->cfg.ovp);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_ILIMIT,
- WLED3_CTRL_REG_ILIMIT_MASK,
- wled->cfg.boost_i_limit);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->ctrl_addr + WLED3_CTRL_REG_FREQ,
- WLED3_CTRL_REG_FREQ_MASK,
- wled->cfg.switch_freq);
- if (rc < 0)
- return rc;
- /* Per sink/string configuration */
- for (i = 0; i < wled->cfg.num_strings; ++i) {
- j = wled->cfg.enabled_strings[i];
- addr = wled->sink_addr +
- WLED4_SINK_REG_STR_FULL_SCALE_CURR(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED4_SINK_REG_STR_FULL_SCALE_CURR_MASK,
- wled->cfg.string_i_limit);
- if (rc < 0)
- return rc;
- addr = wled->sink_addr + WLED5_SINK_REG_STR_SRC_SEL(j);
- rc = regmap_update_bits(wled->regmap, addr,
- WLED5_SINK_REG_SRC_SEL_MASK,
- wled->cfg.mod_sel == MOD_A ?
- WLED5_SINK_REG_SRC_SEL_MOD_A :
- WLED5_SINK_REG_SRC_SEL_MOD_B);
- temp = j + WLED4_SINK_REG_CURR_SINK_SHFT;
- sink_en |= 1 << temp;
- }
- rc = wled5_cabc_config(wled, wled->cfg.cabc_sel ? true : false);
- if (rc < 0)
- return rc;
- /* Enable one of the modulators A or B based on mod_sel */
- addr = wled->sink_addr + WLED5_SINK_REG_MOD_A_EN;
- val = (wled->cfg.mod_sel == MOD_A) ? WLED5_SINK_REG_MOD_EN_MASK : 0;
- rc = regmap_update_bits(wled->regmap, addr,
- WLED5_SINK_REG_MOD_EN_MASK, val);
- if (rc < 0)
- return rc;
- addr = wled->sink_addr + WLED5_SINK_REG_MOD_B_EN;
- val = (wled->cfg.mod_sel == MOD_B) ? WLED5_SINK_REG_MOD_EN_MASK : 0;
- rc = regmap_update_bits(wled->regmap, addr,
- WLED5_SINK_REG_MOD_EN_MASK, val);
- if (rc < 0)
- return rc;
- offset = (wled->cfg.mod_sel == MOD_A) ?
- WLED5_SINK_REG_MOD_A_BRIGHTNESS_WIDTH_SEL :
- WLED5_SINK_REG_MOD_B_BRIGHTNESS_WIDTH_SEL;
- addr = wled->sink_addr + offset;
- val = (wled->max_brightness == WLED5_SINK_REG_BRIGHT_MAX_15B) ?
- WLED5_SINK_REG_BRIGHTNESS_WIDTH_15B :
- WLED5_SINK_REG_BRIGHTNESS_WIDTH_12B;
- rc = regmap_write(wled->regmap, addr, val);
- if (rc < 0)
- return rc;
- rc = regmap_update_bits(wled->regmap,
- wled->sink_addr + WLED4_SINK_REG_CURR_SINK,
- WLED4_SINK_REG_CURR_SINK_MASK, sink_en);
- if (rc < 0)
- return rc;
- /* This updates only FSC configuration in WLED5 */
- rc = wled->wled_sync_toggle(wled);
- if (rc < 0) {
- pr_err("Failed to toggle sync reg rc:%d\n", rc);
- return rc;
- }
- rc = wled_auto_detection_at_init(wled);
- if (rc < 0)
- return rc;
- return 0;
- }
- static const struct wled_config wled5_config_defaults = {
- .boost_i_limit = 5,
- .string_i_limit = 10,
- .ovp = 4,
- .num_strings = 4,
- .switch_freq = 11,
- .mod_sel = 0,
- .cabc_sel = 0,
- .cabc = false,
- .external_pfet = false,
- .auto_detection_enabled = false,
- };
- static const u32 wled3_boost_i_limit_values[] = {
- 105, 385, 525, 805, 980, 1260, 1400, 1680,
- };
- static const struct wled_var_cfg wled3_boost_i_limit_cfg = {
- .values = wled3_boost_i_limit_values,
- .size = ARRAY_SIZE(wled3_boost_i_limit_values),
- };
- static const u32 wled4_boost_i_limit_values[] = {
- 105, 280, 450, 620, 970, 1150, 1300, 1500,
- };
- static const struct wled_var_cfg wled4_boost_i_limit_cfg = {
- .values = wled4_boost_i_limit_values,
- .size = ARRAY_SIZE(wled4_boost_i_limit_values),
- };
- static inline u32 wled5_boost_i_limit_values_fn(u32 idx)
- {
- return 525 + (idx * 175);
- }
- static const struct wled_var_cfg wled5_boost_i_limit_cfg = {
- .fn = wled5_boost_i_limit_values_fn,
- .size = 8,
- };
- static const u32 wled3_ovp_values[] = {
- 35, 32, 29, 27,
- };
- static const struct wled_var_cfg wled3_ovp_cfg = {
- .values = wled3_ovp_values,
- .size = ARRAY_SIZE(wled3_ovp_values),
- };
- static const u32 wled4_ovp_values[] = {
- 31100, 29600, 19600, 18100,
- };
- static const struct wled_var_cfg wled4_ovp_cfg = {
- .values = wled4_ovp_values,
- .size = ARRAY_SIZE(wled4_ovp_values),
- };
- static inline u32 wled5_ovp_values_fn(u32 idx)
- {
- /*
- * 0000 - 38.5 V
- * 0001 - 37 V ..
- * 1111 - 16 V
- */
- return 38500 - (idx * 1500);
- }
- static const struct wled_var_cfg wled5_ovp_cfg = {
- .fn = wled5_ovp_values_fn,
- .size = 16,
- };
- static u32 wled3_switch_freq_values_fn(u32 idx)
- {
- return 19200 / (2 * (1 + idx));
- }
- static const struct wled_var_cfg wled3_switch_freq_cfg = {
- .fn = wled3_switch_freq_values_fn,
- .size = 16,
- };
- static const struct wled_var_cfg wled3_string_i_limit_cfg = {
- .size = 26,
- };
- static const u32 wled4_string_i_limit_values[] = {
- 0, 2500, 5000, 7500, 10000, 12500, 15000, 17500, 20000,
- 22500, 25000, 27500, 30000,
- };
- static const struct wled_var_cfg wled4_string_i_limit_cfg = {
- .values = wled4_string_i_limit_values,
- .size = ARRAY_SIZE(wled4_string_i_limit_values),
- };
- static const struct wled_var_cfg wled5_mod_sel_cfg = {
- .size = 2,
- };
- static const struct wled_var_cfg wled5_cabc_sel_cfg = {
- .size = 4,
- };
- static u32 wled_values(const struct wled_var_cfg *cfg, u32 idx)
- {
- if (idx >= cfg->size)
- return UINT_MAX;
- if (cfg->fn)
- return cfg->fn(idx);
- if (cfg->values)
- return cfg->values[idx];
- return idx;
- }
- static int wled_configure(struct wled *wled)
- {
- struct wled_config *cfg = &wled->cfg;
- struct device *dev = wled->dev;
- const __be32 *prop_addr;
- u32 size, val, c;
- int rc, i, j, string_len;
- const struct wled_u32_opts *u32_opts = NULL;
- const struct wled_u32_opts wled3_opts[] = {
- {
- .name = "qcom,current-boost-limit",
- .val_ptr = &cfg->boost_i_limit,
- .cfg = &wled3_boost_i_limit_cfg,
- },
- {
- .name = "qcom,current-limit",
- .val_ptr = &cfg->string_i_limit,
- .cfg = &wled3_string_i_limit_cfg,
- },
- {
- .name = "qcom,ovp",
- .val_ptr = &cfg->ovp,
- .cfg = &wled3_ovp_cfg,
- },
- {
- .name = "qcom,switching-freq",
- .val_ptr = &cfg->switch_freq,
- .cfg = &wled3_switch_freq_cfg,
- },
- };
- const struct wled_u32_opts wled4_opts[] = {
- {
- .name = "qcom,current-boost-limit",
- .val_ptr = &cfg->boost_i_limit,
- .cfg = &wled4_boost_i_limit_cfg,
- },
- {
- .name = "qcom,current-limit-microamp",
- .val_ptr = &cfg->string_i_limit,
- .cfg = &wled4_string_i_limit_cfg,
- },
- {
- .name = "qcom,ovp-millivolt",
- .val_ptr = &cfg->ovp,
- .cfg = &wled4_ovp_cfg,
- },
- {
- .name = "qcom,switching-freq",
- .val_ptr = &cfg->switch_freq,
- .cfg = &wled3_switch_freq_cfg,
- },
- };
- const struct wled_u32_opts wled5_opts[] = {
- {
- .name = "qcom,current-boost-limit",
- .val_ptr = &cfg->boost_i_limit,
- .cfg = &wled5_boost_i_limit_cfg,
- },
- {
- .name = "qcom,current-limit-microamp",
- .val_ptr = &cfg->string_i_limit,
- .cfg = &wled4_string_i_limit_cfg,
- },
- {
- .name = "qcom,ovp-millivolt",
- .val_ptr = &cfg->ovp,
- .cfg = &wled5_ovp_cfg,
- },
- {
- .name = "qcom,switching-freq",
- .val_ptr = &cfg->switch_freq,
- .cfg = &wled3_switch_freq_cfg,
- },
- {
- .name = "qcom,modulator-sel",
- .val_ptr = &cfg->mod_sel,
- .cfg = &wled5_mod_sel_cfg,
- },
- {
- .name = "qcom,cabc-sel",
- .val_ptr = &cfg->cabc_sel,
- .cfg = &wled5_cabc_sel_cfg,
- },
- };
- const struct wled_bool_opts bool_opts[] = {
- { "qcom,cs-out", &cfg->cs_out_en, },
- { "qcom,ext-gen", &cfg->ext_gen, },
- { "qcom,cabc", &cfg->cabc, },
- { "qcom,external-pfet", &cfg->external_pfet, },
- { "qcom,auto-string-detection", &cfg->auto_detection_enabled, },
- };
- prop_addr = of_get_address(dev->of_node, 0, NULL, NULL);
- if (!prop_addr) {
- dev_err(wled->dev, "invalid IO resources\n");
- return -EINVAL;
- }
- wled->ctrl_addr = be32_to_cpu(*prop_addr);
- rc = of_property_read_string(dev->of_node, "label", &wled->name);
- if (rc)
- wled->name = devm_kasprintf(dev, GFP_KERNEL, "%pOFn", dev->of_node);
- switch (wled->version) {
- case 3:
- u32_opts = wled3_opts;
- size = ARRAY_SIZE(wled3_opts);
- *cfg = wled3_config_defaults;
- wled->wled_set_brightness = wled3_set_brightness;
- wled->wled_sync_toggle = wled3_sync_toggle;
- wled->max_string_count = 3;
- wled->sink_addr = wled->ctrl_addr;
- break;
- case 4:
- u32_opts = wled4_opts;
- size = ARRAY_SIZE(wled4_opts);
- *cfg = wled4_config_defaults;
- wled->wled_set_brightness = wled4_set_brightness;
- wled->wled_sync_toggle = wled3_sync_toggle;
- wled->wled_cabc_config = wled4_cabc_config;
- wled->wled_ovp_delay = wled4_ovp_delay;
- wled->wled_auto_detection_required =
- wled4_auto_detection_required;
- wled->max_string_count = 4;
- prop_addr = of_get_address(dev->of_node, 1, NULL, NULL);
- if (!prop_addr) {
- dev_err(wled->dev, "invalid IO resources\n");
- return -EINVAL;
- }
- wled->sink_addr = be32_to_cpu(*prop_addr);
- break;
- case 5:
- u32_opts = wled5_opts;
- size = ARRAY_SIZE(wled5_opts);
- *cfg = wled5_config_defaults;
- wled->wled_set_brightness = wled5_set_brightness;
- wled->wled_sync_toggle = wled3_sync_toggle;
- wled->wled_cabc_config = wled5_cabc_config;
- wled->wled_ovp_delay = wled5_ovp_delay;
- wled->wled_auto_detection_required =
- wled5_auto_detection_required;
- wled->max_string_count = 4;
- prop_addr = of_get_address(dev->of_node, 1, NULL, NULL);
- if (!prop_addr) {
- dev_err(wled->dev, "invalid IO resources\n");
- return -EINVAL;
- }
- wled->sink_addr = be32_to_cpu(*prop_addr);
- break;
- default:
- dev_err(wled->dev, "Invalid WLED version\n");
- return -EINVAL;
- }
- for (i = 0; i < size; ++i) {
- rc = of_property_read_u32(dev->of_node, u32_opts[i].name, &val);
- if (rc == -EINVAL) {
- continue;
- } else if (rc) {
- dev_err(dev, "error reading '%s'\n", u32_opts[i].name);
- return rc;
- }
- c = UINT_MAX;
- for (j = 0; c != val; j++) {
- c = wled_values(u32_opts[i].cfg, j);
- if (c == UINT_MAX) {
- dev_err(dev, "invalid value for '%s'\n",
- u32_opts[i].name);
- return -EINVAL;
- }
- if (c == val)
- break;
- }
- dev_dbg(dev, "'%s' = %u\n", u32_opts[i].name, c);
- *u32_opts[i].val_ptr = j;
- }
- for (i = 0; i < ARRAY_SIZE(bool_opts); ++i) {
- if (of_property_read_bool(dev->of_node, bool_opts[i].name))
- *bool_opts[i].val_ptr = true;
- }
- string_len = of_property_count_elems_of_size(dev->of_node,
- "qcom,enabled-strings",
- sizeof(u32));
- if (string_len > 0) {
- if (string_len > wled->max_string_count) {
- dev_err(dev, "Cannot have more than %d strings\n",
- wled->max_string_count);
- return -EINVAL;
- }
- rc = of_property_read_u32_array(dev->of_node,
- "qcom,enabled-strings",
- wled->cfg.enabled_strings,
- string_len);
- if (rc) {
- dev_err(dev, "Failed to read %d elements from qcom,enabled-strings: %d\n",
- string_len, rc);
- return rc;
- }
- for (i = 0; i < string_len; ++i) {
- if (wled->cfg.enabled_strings[i] >= wled->max_string_count) {
- dev_err(dev,
- "qcom,enabled-strings index %d at %d is out of bounds\n",
- wled->cfg.enabled_strings[i], i);
- return -EINVAL;
- }
- }
- cfg->num_strings = string_len;
- }
- rc = of_property_read_u32(dev->of_node, "qcom,num-strings", &val);
- if (!rc) {
- if (val < 1 || val > wled->max_string_count) {
- dev_err(dev, "qcom,num-strings must be between 1 and %d\n",
- wled->max_string_count);
- return -EINVAL;
- }
- if (string_len > 0) {
- dev_warn(dev, "Only one of qcom,num-strings or qcom,enabled-strings"
- " should be set\n");
- if (val > string_len) {
- dev_err(dev, "qcom,num-strings exceeds qcom,enabled-strings\n");
- return -EINVAL;
- }
- }
- cfg->num_strings = val;
- }
- return 0;
- }
- static int wled_configure_short_irq(struct wled *wled,
- struct platform_device *pdev)
- {
- int rc;
- if (!wled->has_short_detect)
- return 0;
- rc = regmap_update_bits(wled->regmap, wled->ctrl_addr +
- WLED4_CTRL_REG_SHORT_PROTECT,
- WLED4_CTRL_REG_SHORT_EN_MASK,
- WLED4_CTRL_REG_SHORT_EN_MASK);
- if (rc < 0)
- return rc;
- wled->short_irq = platform_get_irq_byname(pdev, "short");
- if (wled->short_irq < 0) {
- dev_dbg(&pdev->dev, "short irq is not used\n");
- return 0;
- }
- rc = devm_request_threaded_irq(wled->dev, wled->short_irq,
- NULL, wled_short_irq_handler,
- IRQF_ONESHOT,
- "wled_short_irq", wled);
- if (rc < 0)
- dev_err(wled->dev, "Unable to request short_irq (err:%d)\n",
- rc);
- return rc;
- }
- static int wled_configure_ovp_irq(struct wled *wled,
- struct platform_device *pdev)
- {
- int rc;
- u32 val;
- wled->ovp_irq = platform_get_irq_byname(pdev, "ovp");
- if (wled->ovp_irq < 0) {
- dev_dbg(&pdev->dev, "OVP IRQ not found - disabling automatic string detection\n");
- return 0;
- }
- rc = devm_request_threaded_irq(wled->dev, wled->ovp_irq, NULL,
- wled_ovp_irq_handler, IRQF_ONESHOT,
- "wled_ovp_irq", wled);
- if (rc < 0) {
- dev_err(wled->dev, "Unable to request ovp_irq (err:%d)\n",
- rc);
- wled->ovp_irq = 0;
- return 0;
- }
- rc = regmap_read(wled->regmap, wled->ctrl_addr +
- WLED3_CTRL_REG_MOD_EN, &val);
- if (rc < 0)
- return rc;
- /* Keep OVP irq disabled until module is enabled */
- if (!(val & WLED3_CTRL_REG_MOD_EN_MASK))
- disable_irq(wled->ovp_irq);
- return 0;
- }
- static const struct backlight_ops wled_ops = {
- .update_status = wled_update_status,
- };
- static int wled_probe(struct platform_device *pdev)
- {
- struct backlight_properties props;
- struct backlight_device *bl;
- struct wled *wled;
- struct regmap *regmap;
- u32 val;
- int rc;
- regmap = dev_get_regmap(pdev->dev.parent, NULL);
- if (!regmap) {
- dev_err(&pdev->dev, "Unable to get regmap\n");
- return -EINVAL;
- }
- wled = devm_kzalloc(&pdev->dev, sizeof(*wled), GFP_KERNEL);
- if (!wled)
- return -ENOMEM;
- wled->regmap = regmap;
- wled->dev = &pdev->dev;
- wled->version = (uintptr_t)of_device_get_match_data(&pdev->dev);
- if (!wled->version) {
- dev_err(&pdev->dev, "Unknown device version\n");
- return -ENODEV;
- }
- mutex_init(&wled->lock);
- rc = wled_configure(wled);
- if (rc)
- return rc;
- val = WLED3_SINK_REG_BRIGHT_MAX;
- of_property_read_u32(pdev->dev.of_node, "max-brightness", &val);
- wled->max_brightness = val;
- switch (wled->version) {
- case 3:
- wled->cfg.auto_detection_enabled = false;
- rc = wled3_setup(wled);
- if (rc) {
- dev_err(&pdev->dev, "wled3_setup failed\n");
- return rc;
- }
- break;
- case 4:
- wled->has_short_detect = true;
- rc = wled4_setup(wled);
- if (rc) {
- dev_err(&pdev->dev, "wled4_setup failed\n");
- return rc;
- }
- break;
- case 5:
- wled->has_short_detect = true;
- if (wled->cfg.cabc_sel)
- wled->max_brightness = WLED5_SINK_REG_BRIGHT_MAX_12B;
- rc = wled5_setup(wled);
- if (rc) {
- dev_err(&pdev->dev, "wled5_setup failed\n");
- return rc;
- }
- break;
- default:
- dev_err(wled->dev, "Invalid WLED version\n");
- break;
- }
- INIT_DELAYED_WORK(&wled->ovp_work, wled_ovp_work);
- rc = wled_configure_short_irq(wled, pdev);
- if (rc < 0)
- return rc;
- rc = wled_configure_ovp_irq(wled, pdev);
- if (rc < 0)
- return rc;
- val = WLED_DEFAULT_BRIGHTNESS;
- of_property_read_u32(pdev->dev.of_node, "default-brightness", &val);
- memset(&props, 0, sizeof(struct backlight_properties));
- props.type = BACKLIGHT_RAW;
- props.brightness = val;
- props.max_brightness = wled->max_brightness;
- bl = devm_backlight_device_register(&pdev->dev, wled->name,
- &pdev->dev, wled,
- &wled_ops, &props);
- return PTR_ERR_OR_ZERO(bl);
- };
- static int wled_remove(struct platform_device *pdev)
- {
- struct wled *wled = dev_get_drvdata(&pdev->dev);
- mutex_destroy(&wled->lock);
- cancel_delayed_work_sync(&wled->ovp_work);
- disable_irq(wled->short_irq);
- disable_irq(wled->ovp_irq);
- return 0;
- }
- static const struct of_device_id wled_match_table[] = {
- { .compatible = "qcom,pm8941-wled", .data = (void *)3 },
- { .compatible = "qcom,pmi8998-wled", .data = (void *)4 },
- { .compatible = "qcom,pm660l-wled", .data = (void *)4 },
- { .compatible = "qcom,pm8150l-wled", .data = (void *)5 },
- {}
- };
- MODULE_DEVICE_TABLE(of, wled_match_table);
- static struct platform_driver wled_driver = {
- .probe = wled_probe,
- .remove = wled_remove,
- .driver = {
- .name = "qcom,wled",
- .of_match_table = wled_match_table,
- },
- };
- module_platform_driver(wled_driver);
- MODULE_DESCRIPTION("Qualcomm WLED driver");
- MODULE_LICENSE("GPL v2");
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