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49d943a426
Drop deprecated defines not used anymore as the related function got moved to lp55xx-common. Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Link: https://lore.kernel.org/r/20240626160027.19703-20-ansuelsmth@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
160 lines
3.7 KiB
C
160 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* TI LP8501 9 channel LED Driver
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*
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* Copyright (C) 2013 Texas Instruments
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*
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* Author: Milo(Woogyom) Kim <milo.kim@ti.com>
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*/
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#include <linux/delay.h>
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#include <linux/firmware.h>
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#include <linux/i2c.h>
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#include <linux/init.h>
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#include <linux/leds.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/platform_data/leds-lp55xx.h>
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#include <linux/slab.h>
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#include "leds-lp55xx-common.h"
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#define LP8501_PAGES_PER_ENGINE 1
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#define LP8501_MAX_LEDS 9
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/* Registers */
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#define LP8501_REG_ENABLE 0x00
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#define LP8501_ENABLE BIT(6)
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#define LP8501_REG_OP_MODE 0x01
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#define LP8501_REG_PWR_CONFIG 0x05
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#define LP8501_PWR_CONFIG_M 0x03
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#define LP8501_REG_LED_PWM_BASE 0x16
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#define LP8501_REG_LED_CURRENT_BASE 0x26
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#define LP8501_REG_CONFIG 0x36
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#define LP8501_PWM_PSAVE BIT(7)
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#define LP8501_AUTO_INC BIT(6)
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#define LP8501_PWR_SAVE BIT(5)
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#define LP8501_CP_MODE_MASK 0x18
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#define LP8501_CP_MODE_SHIFT 3
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#define LP8501_INT_CLK BIT(0)
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#define LP8501_DEFAULT_CFG (LP8501_PWM_PSAVE | LP8501_AUTO_INC | LP8501_PWR_SAVE)
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#define LP8501_REG_STATUS 0x3A
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#define LP8501_ENGINE_BUSY BIT(4)
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#define LP8501_REG_RESET 0x3D
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#define LP8501_RESET 0xFF
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#define LP8501_REG_PROG_MEM 0x50
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static int lp8501_post_init_device(struct lp55xx_chip *chip)
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{
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int ret;
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u8 val = LP8501_DEFAULT_CFG;
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ret = lp55xx_write(chip, LP8501_REG_ENABLE, LP8501_ENABLE);
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if (ret)
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return ret;
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/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
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usleep_range(1000, 2000);
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if (chip->pdata->clock_mode != LP55XX_CLOCK_EXT)
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val |= LP8501_INT_CLK;
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val |= (chip->pdata->charge_pump_mode << LP8501_CP_MODE_SHIFT) & LP8501_CP_MODE_MASK;
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ret = lp55xx_write(chip, LP8501_REG_CONFIG, val);
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if (ret)
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return ret;
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/* Power selection for each output */
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return lp55xx_update_bits(chip, LP8501_REG_PWR_CONFIG,
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LP8501_PWR_CONFIG_M, chip->pdata->pwr_sel);
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}
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static void lp8501_run_engine(struct lp55xx_chip *chip, bool start)
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{
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/* stop engine */
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if (!start) {
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lp55xx_stop_all_engine(chip);
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lp55xx_turn_off_channels(chip);
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return;
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}
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lp55xx_run_engine_common(chip);
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}
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/* Chip specific configurations */
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static struct lp55xx_device_config lp8501_cfg = {
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.reg_op_mode = {
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.addr = LP8501_REG_OP_MODE,
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},
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.reg_exec = {
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.addr = LP8501_REG_ENABLE,
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},
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.engine_busy = {
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.addr = LP8501_REG_STATUS,
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.mask = LP8501_ENGINE_BUSY,
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},
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.reset = {
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.addr = LP8501_REG_RESET,
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.val = LP8501_RESET,
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},
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.enable = {
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.addr = LP8501_REG_ENABLE,
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.val = LP8501_ENABLE,
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},
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.prog_mem_base = {
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.addr = LP8501_REG_PROG_MEM,
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},
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.reg_led_pwm_base = {
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.addr = LP8501_REG_LED_PWM_BASE,
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},
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.reg_led_current_base = {
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.addr = LP8501_REG_LED_CURRENT_BASE,
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},
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.pages_per_engine = LP8501_PAGES_PER_ENGINE,
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.max_channel = LP8501_MAX_LEDS,
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.post_init_device = lp8501_post_init_device,
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.brightness_fn = lp55xx_led_brightness,
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.set_led_current = lp55xx_set_led_current,
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.firmware_cb = lp55xx_firmware_loaded_cb,
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.run_engine = lp8501_run_engine,
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};
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static const struct i2c_device_id lp8501_id[] = {
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{ "lp8501", .driver_data = (kernel_ulong_t)&lp8501_cfg, },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lp8501_id);
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static const struct of_device_id of_lp8501_leds_match[] = {
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{ .compatible = "ti,lp8501", .data = &lp8501_cfg, },
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{},
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};
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MODULE_DEVICE_TABLE(of, of_lp8501_leds_match);
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static struct i2c_driver lp8501_driver = {
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.driver = {
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.name = "lp8501",
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.of_match_table = of_lp8501_leds_match,
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},
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.probe = lp55xx_probe,
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.remove = lp55xx_remove,
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.id_table = lp8501_id,
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};
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module_i2c_driver(lp8501_driver);
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MODULE_DESCRIPTION("Texas Instruments LP8501 LED driver");
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MODULE_AUTHOR("Milo Kim");
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MODULE_LICENSE("GPL");
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