diff options
Diffstat (limited to 'drivers/leds/leds-aw200xx.c')
| -rw-r--r-- | drivers/leds/leds-aw200xx.c | 91 |
1 files changed, 77 insertions, 14 deletions
diff --git a/drivers/leds/leds-aw200xx.c b/drivers/leds/leds-aw200xx.c index f3bed4f05b..f584a7f98f 100644 --- a/drivers/leds/leds-aw200xx.c +++ b/drivers/leds/leds-aw200xx.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 /* - * Awinic AW20036/AW20054/AW20072 LED driver + * Awinic AW20036/AW20054/AW20072/AW20108 LED driver * * Copyright (c) 2023, SberDevices. All Rights Reserved. * @@ -10,6 +10,7 @@ #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> @@ -86,6 +87,8 @@ #define AW200XX_REG_DIM(x, columns) \ AW200XX_REG(AW200XX_PAGE4, AW200XX_LED2REG(x, columns) * 2) #define AW200XX_REG_DIM2FADE(x) ((x) + 1) +#define AW200XX_REG_FADE2DIM(fade) \ + DIV_ROUND_UP((fade) * AW200XX_DIM_MAX, AW200XX_FADE_MAX) /* * Duty ratio of display scan (see p.15 of datasheet for formula): @@ -116,6 +119,7 @@ struct aw200xx { struct mutex mutex; u32 num_leds; u32 display_rows; + struct gpio_desc *hwen; struct aw200xx_led leds[] __counted_by(num_leds); }; @@ -193,9 +197,7 @@ static int aw200xx_brightness_set(struct led_classdev *cdev, dim = led->dim; if (dim < 0) - dim = max_t(int, - brightness / (AW200XX_FADE_MAX / AW200XX_DIM_MAX), - 1); + dim = AW200XX_REG_FADE2DIM(brightness); ret = regmap_write(chip->regmap, reg, dim); if (ret) @@ -319,6 +321,9 @@ static int aw200xx_chip_reset(const struct aw200xx *const chip) if (ret) return ret; + /* According to the datasheet software reset takes at least 1ms */ + fsleep(1000); + regcache_mark_dirty(chip->regmap); return regmap_write(chip->regmap, AW200XX_REG_FCD, AW200XX_FCD_CLEAR); } @@ -358,6 +363,50 @@ static int aw200xx_chip_check(const struct aw200xx *const chip) return 0; } +static void aw200xx_enable(const struct aw200xx *const chip) +{ + gpiod_set_value_cansleep(chip->hwen, 1); + + /* + * After HWEN pin set high the chip begins to load the OTP information, + * which takes 200us to complete. About 200us wait time is needed for + * internal oscillator startup and display SRAM initialization. After + * display SRAM initialization, the registers in page1 to page5 can be + * configured via i2c interface. + */ + fsleep(400); +} + +static void aw200xx_disable(const struct aw200xx *const chip) +{ + return gpiod_set_value_cansleep(chip->hwen, 0); +} + +static int aw200xx_probe_get_display_rows(struct device *dev, + struct aw200xx *chip) +{ + struct fwnode_handle *child; + u32 max_source = 0; + + device_for_each_child_node(dev, child) { + u32 source; + int ret; + + ret = fwnode_property_read_u32(child, "reg", &source); + if (ret || source >= chip->cdef->channels) + continue; + + max_source = max(max_source, source); + } + + if (max_source == 0) + return -EINVAL; + + chip->display_rows = max_source / chip->cdef->display_size_columns + 1; + + return 0; +} + static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) { struct fwnode_handle *child; @@ -365,18 +414,10 @@ static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) int ret; int i; - ret = device_property_read_u32(dev, "awinic,display-rows", - &chip->display_rows); + ret = aw200xx_probe_get_display_rows(dev, chip); if (ret) return dev_err_probe(dev, ret, - "Failed to read 'display-rows' property\n"); - - if (!chip->display_rows || - chip->display_rows > chip->cdef->display_size_rows_max) { - return dev_err_probe(dev, -EINVAL, - "Invalid leds display size %u\n", - chip->display_rows); - } + "No valid led definitions found\n"); current_max = aw200xx_imax_from_global(chip, AW200XX_IMAX_MAX_uA); current_min = aw200xx_imax_from_global(chip, AW200XX_IMAX_MIN_uA); @@ -421,6 +462,7 @@ static int aw200xx_probe_fw(struct device *dev, struct aw200xx *chip) led->num = source; led->chip = chip; led->cdev.brightness_set_blocking = aw200xx_brightness_set; + led->cdev.max_brightness = AW200XX_FADE_MAX; led->cdev.groups = dim_groups; init_data.fwnode = child; @@ -485,6 +527,7 @@ static const struct regmap_config aw200xx_regmap_config = { .rd_table = &aw200xx_readable_table, .wr_table = &aw200xx_writeable_table, .cache_type = REGCACHE_MAPLE, + .disable_locking = true, }; static int aw200xx_probe(struct i2c_client *client) @@ -517,6 +560,14 @@ static int aw200xx_probe(struct i2c_client *client) if (IS_ERR(chip->regmap)) return PTR_ERR(chip->regmap); + chip->hwen = devm_gpiod_get_optional(&client->dev, "enable", + GPIOD_OUT_HIGH); + if (IS_ERR(chip->hwen)) + return dev_err_probe(&client->dev, PTR_ERR(chip->hwen), + "Cannot get enable GPIO"); + + aw200xx_enable(chip); + ret = aw200xx_chip_check(chip); if (ret) return ret; @@ -537,6 +588,9 @@ static int aw200xx_probe(struct i2c_client *client) ret = aw200xx_chip_init(chip); out_unlock: + if (ret) + aw200xx_disable(chip); + mutex_unlock(&chip->mutex); return ret; } @@ -546,6 +600,7 @@ static void aw200xx_remove(struct i2c_client *client) struct aw200xx *chip = i2c_get_clientdata(client); aw200xx_chip_reset(chip); + aw200xx_disable(chip); mutex_destroy(&chip->mutex); } @@ -567,10 +622,17 @@ static const struct aw200xx_chipdef aw20072_cdef = { .display_size_columns = 12, }; +static const struct aw200xx_chipdef aw20108_cdef = { + .channels = 108, + .display_size_rows_max = 9, + .display_size_columns = 12, +}; + static const struct i2c_device_id aw200xx_id[] = { { "aw20036" }, { "aw20054" }, { "aw20072" }, + { "aw20108" }, {} }; MODULE_DEVICE_TABLE(i2c, aw200xx_id); @@ -579,6 +641,7 @@ static const struct of_device_id aw200xx_match_table[] = { { .compatible = "awinic,aw20036", .data = &aw20036_cdef, }, { .compatible = "awinic,aw20054", .data = &aw20054_cdef, }, { .compatible = "awinic,aw20072", .data = &aw20072_cdef, }, + { .compatible = "awinic,aw20108", .data = &aw20108_cdef, }, {} }; MODULE_DEVICE_TABLE(of, aw200xx_match_table); |