| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ansuel Smith | 2274 | 100.00% | 6 | 100.00% |
| Total | 2274 | 6 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2024 Christian Marangi <ansuelsmth@gmail.com> */ #include <linux/bitfield.h> #include <linux/cleanup.h> #include <linux/delay.h> #include <linux/firmware.h> #include <linux/i2c.h> #include <linux/iopoll.h> #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of.h> #include <linux/platform_data/leds-lp55xx.h> #include <linux/slab.h> #include <dt-bindings/leds/leds-lp55xx.h> #include "leds-lp55xx-common.h" #define LP5569_MAX_LEDS 9 /* Memory is used like this: * 0x00 engine 1 program (4 pages) * 0x40 engine 2 program (4 pages) * 0x80 engine 3 program (4 pages) * 0xc0 engine 1 muxing info (1 page) * 0xd0 engine 2 muxing info (1 page) * 0xe0 engine 3 muxing info (1 page) */ #define LP5569_PAGES_PER_ENGINE 4 #define LP5569_REG_ENABLE 0x00 #define LP5569_ENABLE BIT(6) #define LP5569_REG_EXEC_CTRL 0x01 #define LP5569_MODE_ENG_SHIFT 2 #define LP5569_REG_OP_MODE 0x02 #define LP5569_EXEC_ENG_SHIFT 2 #define LP5569_REG_ENABLE_LEDS_MSB 0x04 #define LP5569_REG_ENABLE_LEDS_LSB 0x05 #define LP5569_REG_LED_CTRL_BASE 0x07 #define LP5569_FADER_MAPPING_MASK GENMASK(7, 5) #define LP5569_REG_LED_PWM_BASE 0x16 #define LP5569_REG_LED_CURRENT_BASE 0x22 #define LP5569_REG_MISC 0x2F #define LP5569_AUTO_INC BIT(6) #define LP5569_PWR_SAVE BIT(5) #define LP5569_CP_MODE_MASK GENMASK(4, 3) #define LP5569_PWM_PWR_SAVE BIT(2) #define LP5569_INTERNAL_CLK BIT(0) #define LP5569_REG_MISC2 0x33 #define LP5569_LED_SHORT_TEST BIT(4) #define LP5569_LED_OPEN_TEST BIT(3) #define LP5569_REG_STATUS 0x3C #define LP5569_MASK_BUSY BIT(7) #define LP5569_STARTUP_BUSY BIT(6) #define LP5569_ENGINE_BUSY BIT(5) #define LP5569_ENGINE1_INT BIT(2) #define LP5569_ENGINE2_INT BIT(1) #define LP5569_ENGINE3_INT BIT(0) #define LP5569_ENG_STATUS_MASK (LP5569_ENGINE1_INT | LP5569_ENGINE2_INT | \ LP5569_ENGINE3_INT) #define LP5569_REG_IO_CONTROL 0x3D #define LP5569_CLK_OUTPUT BIT(3) #define LP5569_REG_RESET 0x3F #define LP5569_RESET 0xFF #define LP5569_REG_MASTER_FADER_BASE 0x46 #define LP5569_REG_CH1_PROG_START 0x4B #define LP5569_REG_CH2_PROG_START 0x4C #define LP5569_REG_CH3_PROG_START 0x4D #define LP5569_REG_PROG_PAGE_SEL 0x4F #define LP5569_REG_PROG_MEM 0x50 #define LP5569_REG_LED_FAULT1 0x81 #define LP5569_LED_FAULT8 BIT(0) #define LP5569_REG_LED_FAULT2 0x82 #define LP5569_LED_FAULT7 BIT(7) #define LP5569_LED_FAULT6 BIT(6) #define LP5569_LED_FAULT5 BIT(5) #define LP5569_LED_FAULT4 BIT(4) #define LP5569_LED_FAULT3 BIT(3) #define LP5569_LED_FAULT2 BIT(2) #define LP5569_LED_FAULT1 BIT(1) #define LP5569_LED_FAULT0 BIT(0) #define LP5569_ENG1_PROG_ADDR 0x0 #define LP5569_ENG2_PROG_ADDR 0x40 #define LP5569_ENG3_PROG_ADDR 0x80 #define LP5569_ENG1_MUX_ADDR 0xc0 #define LP5569_ENG2_MUX_ADDR 0xd0 #define LP5569_ENG3_MUX_ADDR 0xe0 #define LP5569_STARTUP_SLEEP 500 #define LEDn_STATUS_FAULT(n, status) ((status) >> (n) & BIT(0)) #define LP5569_DEFAULT_CONFIG \ (LP5569_AUTO_INC | LP5569_PWR_SAVE | LP5569_PWM_PWR_SAVE) static void lp5569_run_engine(struct lp55xx_chip *chip, bool start) { if (!start) { lp55xx_stop_engine(chip); lp55xx_turn_off_channels(chip); return; } lp55xx_run_engine_common(chip); } static int lp5569_init_program_engine(struct lp55xx_chip *chip) { int i; int j; int ret; u8 status; /* Precompiled pattern per ENGINE setting LED MUX start and stop addresses */ static const u8 pattern[][LP55xx_BYTES_PER_PAGE] = { { 0x9c, LP5569_ENG1_MUX_ADDR, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0}, { 0x9c, LP5569_ENG2_MUX_ADDR, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0}, { 0x9c, LP5569_ENG3_MUX_ADDR, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0}, }; /* Setup each ENGINE program start address */ ret = lp55xx_write(chip, LP5569_REG_CH1_PROG_START, LP5569_ENG1_PROG_ADDR); if (ret) return ret; ret = lp55xx_write(chip, LP5569_REG_CH2_PROG_START, LP5569_ENG2_PROG_ADDR); if (ret) return ret; ret = lp55xx_write(chip, LP5569_REG_CH3_PROG_START, LP5569_ENG3_PROG_ADDR); if (ret) return ret; /* Write precompiled pattern for LED MUX address space for each ENGINE */ for (i = LP55XX_ENGINE_1; i <= LP55XX_ENGINE_3; i++) { chip->engine_idx = i; lp55xx_load_engine(chip); for (j = 0; j < LP55xx_BYTES_PER_PAGE; j++) { ret = lp55xx_write(chip, LP5569_REG_PROG_MEM + j, pattern[i - 1][j]); if (ret) goto out; } } lp5569_run_engine(chip, true); /* Let the programs run for couple of ms and check the engine status */ usleep_range(3000, 6000); lp55xx_read(chip, LP5569_REG_STATUS, &status); status = FIELD_GET(LP5569_ENG_STATUS_MASK, status); if (status != LP5569_ENG_STATUS_MASK) { dev_err(&chip->cl->dev, "could not configure LED engine, status = 0x%.2x\n", status); ret = -EINVAL; } out: lp55xx_stop_all_engine(chip); return ret; } static int lp5569_post_init_device(struct lp55xx_chip *chip) { int ret; u8 val; val = LP5569_DEFAULT_CONFIG; val |= FIELD_PREP(LP5569_CP_MODE_MASK, chip->pdata->charge_pump_mode); ret = lp55xx_write(chip, LP5569_REG_MISC, val); if (ret) return ret; if (chip->pdata->clock_mode == LP55XX_CLOCK_INT) { /* Internal clock MUST be configured before CLK output */ ret = lp55xx_update_bits(chip, LP5569_REG_MISC, LP5569_INTERNAL_CLK, LP5569_INTERNAL_CLK); if (ret) return ret; ret = lp55xx_update_bits(chip, LP5569_REG_IO_CONTROL, LP5569_CLK_OUTPUT, LP5569_CLK_OUTPUT); if (ret) return ret; } ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE); if (ret) return ret; read_poll_timeout(lp55xx_read, ret, !(val & LP5569_STARTUP_BUSY), LP5569_STARTUP_SLEEP, LP5569_STARTUP_SLEEP * 10, false, chip, LP5569_REG_STATUS, &val); return lp5569_init_program_engine(chip); } static ssize_t lp5569_led_open_test(struct lp55xx_led *led, char *buf) { struct lp55xx_chip *chip = led->chip; struct lp55xx_platform_data *pdata = chip->pdata; bool leds_fault[LP5569_MAX_LEDS]; struct lp55xx_led *led_tmp = led; int i, ret, pos = 0; u8 status; /* Set in STANDBY state */ ret = lp55xx_write(chip, LP5569_REG_ENABLE, 0); if (ret) goto exit; /* Wait 1ms for device to enter STANDBY state */ usleep_range(1000, 2000); /* Set Charge Pump to 1.5x */ ret = lp55xx_update_bits(chip, LP5569_REG_MISC, FIELD_PREP(LP5569_CP_MODE_MASK, LP55XX_CP_BOOST), LP5569_CP_MODE_MASK); if (ret) goto exit; /* Enable LED Open Test */ ret = lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST, LP5569_LED_OPEN_TEST); if (ret) goto exit; /* Put Device in NORMAL state */ ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE); if (ret) goto exit; /* Wait 500 us for device to enter NORMAL state */ usleep_range(500, 750); /* Enable LED and set to 100% brightness */ for (i = 0; i < pdata->num_channels; i++) { ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr, LED_FULL); if (ret) goto exit; led_tmp++; } /* Wait 500 us for device to fill status regs */ usleep_range(500, 750); /* Parse status led fault 1 regs */ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT1, &status); if (ret < 0) goto exit; for (i = 0; i < 8; i++) leds_fault[i] = !!((status >> i) & 0x1); /* Parse status led fault 2 regs */ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT2, &status); if (ret < 0) goto exit; for (i = 0; i < 1; i++) leds_fault[i + 8] = !!((status >> i) & 0x1); /* Report LED fault */ led_tmp = led; for (i = 0; i < pdata->num_channels; i++) { if (leds_fault[led_tmp->chan_nr]) pos += sysfs_emit_at(buf, pos, "LED %d OPEN FAIL\n", led_tmp->chan_nr); led_tmp++; } ret = pos; exit: /* Disable LED Open Test */ lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST, 0); led_tmp = led; for (i = 0; i < pdata->num_channels; i++) { lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr, 0); led_tmp++; } return ret; } static ssize_t lp5569_led_short_test(struct lp55xx_led *led, char *buf) { struct lp55xx_chip *chip = led->chip; struct lp55xx_platform_data *pdata = chip->pdata; bool leds_fault[LP5569_MAX_LEDS]; struct lp55xx_led *led_tmp = led; int i, ret, pos = 0; u8 status; /* Set in STANDBY state */ ret = lp55xx_write(chip, LP5569_REG_ENABLE, 0); if (ret) goto exit; /* Wait 1ms for device to enter STANDBY state */ usleep_range(1000, 2000); /* Set Charge Pump to 1x */ ret = lp55xx_update_bits(chip, LP5569_REG_MISC, FIELD_PREP(LP5569_CP_MODE_MASK, LP55XX_CP_BYPASS), LP5569_CP_MODE_MASK); if (ret) goto exit; /* Enable LED and set to 100% brightness and current to 100% (25.5mA) */ for (i = 0; i < pdata->num_channels; i++) { ret = lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr, LED_FULL); if (ret) goto exit; ret = lp55xx_write(chip, LP5569_REG_LED_CURRENT_BASE + led_tmp->chan_nr, LED_FULL); if (ret) goto exit; led_tmp++; } /* Put Device in NORMAL state */ ret = lp55xx_write(chip, LP5569_REG_ENABLE, LP5569_ENABLE); if (ret) goto exit; /* Wait 500 us for device to enter NORMAL state */ usleep_range(500, 750); /* Enable LED Shorted Test */ ret = lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_OPEN_TEST, LP5569_LED_SHORT_TEST); if (ret) goto exit; /* Wait 500 us for device to fill status regs */ usleep_range(500, 750); /* Parse status led fault 1 regs */ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT1, &status); if (ret < 0) goto exit; for (i = 0; i < 8; i++) leds_fault[i] = !!LEDn_STATUS_FAULT(i, status); /* Parse status led fault 2 regs */ ret = lp55xx_read(chip, LP5569_REG_LED_FAULT2, &status); if (ret < 0) goto exit; for (i = 0; i < 1; i++) leds_fault[i + 8] = !!LEDn_STATUS_FAULT(i, status); /* Report LED fault */ led_tmp = led; for (i = 0; i < pdata->num_channels; i++) { if (leds_fault[led_tmp->chan_nr]) pos += sysfs_emit_at(buf, pos, "LED %d SHORTED FAIL\n", led_tmp->chan_nr); led_tmp++; } ret = pos; exit: /* Disable LED Shorted Test */ lp55xx_update_bits(chip, LP5569_REG_MISC2, LP5569_LED_SHORT_TEST, 0); led_tmp = led; for (i = 0; i < pdata->num_channels; i++) { lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led_tmp->chan_nr, 0); led_tmp++; } return ret; } static ssize_t lp5569_selftest(struct device *dev, struct device_attribute *attr, char *buf) { struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); struct lp55xx_chip *chip = led->chip; int i, pos = 0; guard(mutex)(&chip->lock); /* Test LED Open */ pos = lp5569_led_open_test(led, buf); if (pos < 0) return sprintf(buf, "FAIL\n"); /* Test LED Shorted */ pos += lp5569_led_short_test(led, buf); if (pos < 0) return sprintf(buf, "FAIL\n"); for (i = 0; i < chip->pdata->num_channels; i++) { /* Restore current */ lp55xx_write(chip, LP5569_REG_LED_CURRENT_BASE + led->chan_nr, led->led_current); /* Restore brightness */ lp55xx_write(chip, LP5569_REG_LED_PWM_BASE + led->chan_nr, led->brightness); led++; } return pos == 0 ? sysfs_emit(buf, "OK\n") : pos; } LP55XX_DEV_ATTR_ENGINE_MODE(1); LP55XX_DEV_ATTR_ENGINE_MODE(2); LP55XX_DEV_ATTR_ENGINE_MODE(3); LP55XX_DEV_ATTR_ENGINE_LEDS(1); LP55XX_DEV_ATTR_ENGINE_LEDS(2); LP55XX_DEV_ATTR_ENGINE_LEDS(3); LP55XX_DEV_ATTR_ENGINE_LOAD(1); LP55XX_DEV_ATTR_ENGINE_LOAD(2); LP55XX_DEV_ATTR_ENGINE_LOAD(3); static LP55XX_DEV_ATTR_RO(selftest, lp5569_selftest); LP55XX_DEV_ATTR_MASTER_FADER(1); LP55XX_DEV_ATTR_MASTER_FADER(2); LP55XX_DEV_ATTR_MASTER_FADER(3); static LP55XX_DEV_ATTR_RW(master_fader_leds, lp55xx_show_master_fader_leds, lp55xx_store_master_fader_leds); static struct attribute *lp5569_attributes[] = { &dev_attr_engine1_mode.attr, &dev_attr_engine2_mode.attr, &dev_attr_engine3_mode.attr, &dev_attr_engine1_load.attr, &dev_attr_engine2_load.attr, &dev_attr_engine3_load.attr, &dev_attr_engine1_leds.attr, &dev_attr_engine2_leds.attr, &dev_attr_engine3_leds.attr, &dev_attr_selftest.attr, &dev_attr_master_fader1.attr, &dev_attr_master_fader2.attr, &dev_attr_master_fader3.attr, &dev_attr_master_fader_leds.attr, NULL, }; static const struct attribute_group lp5569_group = { .attrs = lp5569_attributes, }; /* Chip specific configurations */ static struct lp55xx_device_config lp5569_cfg = { .reg_op_mode = { .addr = LP5569_REG_OP_MODE, .shift = LP5569_MODE_ENG_SHIFT, }, .reg_exec = { .addr = LP5569_REG_EXEC_CTRL, .shift = LP5569_EXEC_ENG_SHIFT, }, .reset = { .addr = LP5569_REG_RESET, .val = LP5569_RESET, }, .enable = { .addr = LP5569_REG_ENABLE, .val = LP5569_ENABLE, }, .prog_mem_base = { .addr = LP5569_REG_PROG_MEM, }, .reg_led_pwm_base = { .addr = LP5569_REG_LED_PWM_BASE, }, .reg_led_current_base = { .addr = LP5569_REG_LED_CURRENT_BASE, }, .reg_master_fader_base = { .addr = LP5569_REG_MASTER_FADER_BASE, }, .reg_led_ctrl_base = { .addr = LP5569_REG_LED_CTRL_BASE, }, .pages_per_engine = LP5569_PAGES_PER_ENGINE, .max_channel = LP5569_MAX_LEDS, .post_init_device = lp5569_post_init_device, .brightness_fn = lp55xx_led_brightness, .multicolor_brightness_fn = lp55xx_multicolor_brightness, .set_led_current = lp55xx_set_led_current, .firmware_cb = lp55xx_firmware_loaded_cb, .run_engine = lp5569_run_engine, .dev_attr_group = &lp5569_group, }; static const struct i2c_device_id lp5569_id[] = { { "lp5569", .driver_data = (kernel_ulong_t)&lp5569_cfg, }, { } }; MODULE_DEVICE_TABLE(i2c, lp5569_id); static const struct of_device_id of_lp5569_leds_match[] = { { .compatible = "ti,lp5569", .data = &lp5569_cfg, }, {}, }; MODULE_DEVICE_TABLE(of, of_lp5569_leds_match); static struct i2c_driver lp5569_driver = { .driver = { .name = "lp5569", .of_match_table = of_lp5569_leds_match, }, .probe = lp55xx_probe, .remove = lp55xx_remove, .id_table = lp5569_id, }; module_i2c_driver(lp5569_driver); MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>"); MODULE_DESCRIPTION("LP5569 LED engine"); MODULE_LICENSE("GPL");
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