// SPDX-License-Identifier: GPL-2.0 /* * Awinic AW20036/AW20054/AW20072/AW20108 LED driver * * Copyright (c) 2023, SberDevices. All Rights Reserved. * * Author: Martin Kurbanov <[email protected]> */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/container_of.h> #include <linux/gpio/consumer.h> #include <linux/i2c.h> #include <linux/leds.h> #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/regmap.h> #include <linux/time.h> #include <linux/units.h> #define AW200XX_DIM_MAX … #define AW200XX_FADE_MAX … #define AW200XX_IMAX_DEFAULT_uA … #define AW200XX_IMAX_MAX_uA … #define AW200XX_IMAX_MIN_uA … /* Page 0 */ #define AW200XX_REG_PAGE0_BASE … /* Select page register */ #define AW200XX_REG_PAGE … #define AW200XX_PAGE_MASK … #define AW200XX_PAGE_SHIFT … #define AW200XX_NUM_PAGES … #define AW200XX_PAGE_SIZE … #define AW200XX_REG(page, reg) … #define AW200XX_REG_MAX … #define AW200XX_PAGE0 … #define AW200XX_PAGE1 … #define AW200XX_PAGE2 … #define AW200XX_PAGE3 … #define AW200XX_PAGE4 … #define AW200XX_PAGE5 … /* Chip ID register */ #define AW200XX_REG_IDR … #define AW200XX_IDR_CHIPID … /* Sleep mode register */ #define AW200XX_REG_SLPCR … #define AW200XX_SLPCR_ACTIVE … /* Reset register */ #define AW200XX_REG_RSTR … #define AW200XX_RSTR_RESET … /* Global current configuration register */ #define AW200XX_REG_GCCR … #define AW200XX_GCCR_IMAX_MASK … #define AW200XX_GCCR_IMAX(x) … #define AW200XX_GCCR_ALLON … /* Fast clear display control register */ #define AW200XX_REG_FCD … #define AW200XX_FCD_CLEAR … /* Display size configuration */ #define AW200XX_REG_DSIZE … #define AW200XX_DSIZE_COLUMNS_MAX … #define AW200XX_LED2REG(x, columns) … /* DIM current configuration register on page 1 */ #define AW200XX_REG_DIM_PAGE1(x, columns) … /* * DIM current configuration register (page 4). * The even address for current DIM configuration. * The odd address for current FADE configuration */ #define AW200XX_REG_DIM(x, columns) … #define AW200XX_REG_DIM2FADE(x) … #define AW200XX_REG_FADE2DIM(fade) … /* * Duty ratio of display scan (see p.15 of datasheet for formula): * duty = (592us / 600.5us) * (1 / (display_rows + 1)) * * Multiply to 1000 (MILLI) to improve the accuracy of calculations. */ #define AW200XX_DUTY_RATIO(rows) … struct aw200xx_chipdef { … }; struct aw200xx_led { … }; struct aw200xx { … }; static ssize_t dim_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t dim_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(dim); static struct attribute *dim_attrs[] = …; ATTRIBUTE_GROUPS(…); static int aw200xx_brightness_set(struct led_classdev *cdev, enum led_brightness brightness) { … } static u32 aw200xx_imax_from_global(const struct aw200xx *const chip, u32 global_imax_uA) { … } static u32 aw200xx_imax_to_global(const struct aw200xx *const chip, u32 led_imax_uA) { … } #define AW200XX_IMAX_MULTIPLIER1 … #define AW200XX_IMAX_MULTIPLIER2 … #define AW200XX_IMAX_BASE_VAL1 … #define AW200XX_IMAX_BASE_VAL2 … /* * The AW200XX has a 4-bit register (GCCR) to configure the global current, * which ranges from 3.3mA to 160mA. The following table indicates the values * of the global current, divided into two parts: * * +-----------+-----------------+-----------+-----------------+ * | reg value | global max (mA) | reg value | global max (mA) | * +-----------+-----------------+-----------+-----------------+ * | 0 | 10 | 8 | 3.3 | * | 1 | 20 | 9 | 6.7 | * | 2 | 30 | 10 | 10 | * | 3 | 40 | 11 | 13.3 | * | 4 | 60 | 12 | 20 | * | 5 | 80 | 13 | 26.7 | * | 6 | 120 | 14 | 40 | * | 7 | 160 | 15 | 53.3 | * +-----------+-----------------+-----------+-----------------+ * * The left part with a multiplier of 10, and the right part with a multiplier * of 3.3. * So we have two formulas to calculate the global current: * for the left part of the table: * imax = coefficient * 10 * * for the right part of the table: * imax = coefficient * 3.3 * * The coefficient table consists of the following values: * 1, 2, 3, 4, 6, 8, 12, 16. */ static int aw200xx_set_imax(const struct aw200xx *const chip, u32 led_imax_uA) { … } static int aw200xx_chip_reset(const struct aw200xx *const chip) { … } static int aw200xx_chip_init(const struct aw200xx *const chip) { … } static int aw200xx_chip_check(const struct aw200xx *const chip) { … } static void aw200xx_enable(const struct aw200xx *const chip) { … } static void aw200xx_disable(const struct aw200xx *const chip) { … } static int aw200xx_probe_get_display_rows(struct device *dev, struct aw200xx *chip) { … } static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) { … } static const struct regmap_range_cfg aw200xx_ranges[] = …; static const struct regmap_range aw200xx_writeonly_ranges[] = …; static const struct regmap_access_table aw200xx_readable_table = …; static const struct regmap_range aw200xx_readonly_ranges[] = …; static const struct regmap_access_table aw200xx_writeable_table = …; static const struct regmap_config aw200xx_regmap_config = …; static void aw200xx_chip_reset_action(void *data) { … } static void aw200xx_disable_action(void *data) { … } static int aw200xx_probe(struct i2c_client *client) { … } static const struct aw200xx_chipdef aw20036_cdef = …; static const struct aw200xx_chipdef aw20054_cdef = …; static const struct aw200xx_chipdef aw20072_cdef = …; static const struct aw200xx_chipdef aw20108_cdef = …; static const struct i2c_device_id aw200xx_id[] = …; MODULE_DEVICE_TABLE(i2c, aw200xx_id); static const struct of_device_id aw200xx_match_table[] = …; MODULE_DEVICE_TABLE(of, aw200xx_match_table); static struct i2c_driver aw200xx_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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