649 lines
14 KiB
C
649 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* lm3533-core.c -- LM3533 Core
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*
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* Copyright (C) 2011-2012 Texas Instruments
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*
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* Author: Johan Hovold <jhovold@gmail.com>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/i2c.h>
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#include <linux/mfd/core.h>
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#include <linux/regmap.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/mfd/lm3533.h>
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#define LM3533_BOOST_OVP_MASK 0x06
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#define LM3533_BOOST_OVP_SHIFT 1
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#define LM3533_BOOST_FREQ_MASK 0x01
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#define LM3533_BOOST_FREQ_SHIFT 0
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#define LM3533_BL_ID_MASK 1
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#define LM3533_LED_ID_MASK 3
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#define LM3533_BL_ID_MAX 1
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#define LM3533_LED_ID_MAX 3
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#define LM3533_HVLED_ID_MAX 2
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#define LM3533_LVLED_ID_MAX 5
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#define LM3533_REG_OUTPUT_CONF1 0x10
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#define LM3533_REG_OUTPUT_CONF2 0x11
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#define LM3533_REG_BOOST_PWM 0x2c
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#define LM3533_REG_MAX 0xb2
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static struct mfd_cell lm3533_als_devs[] = {
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{
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.name = "lm3533-als",
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.id = -1,
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},
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};
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static struct mfd_cell lm3533_bl_devs[] = {
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{
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.name = "lm3533-backlight",
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.id = 0,
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},
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{
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.name = "lm3533-backlight",
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.id = 1,
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},
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};
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static struct mfd_cell lm3533_led_devs[] = {
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{
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.name = "lm3533-leds",
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.id = 0,
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},
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{
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.name = "lm3533-leds",
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.id = 1,
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},
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{
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.name = "lm3533-leds",
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.id = 2,
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},
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{
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.name = "lm3533-leds",
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.id = 3,
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},
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};
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int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
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{
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int tmp;
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int ret;
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ret = regmap_read(lm3533->regmap, reg, &tmp);
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if (ret < 0) {
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dev_err(lm3533->dev, "failed to read register %02x: %d\n",
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reg, ret);
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return ret;
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}
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*val = tmp;
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dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
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return ret;
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}
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EXPORT_SYMBOL_GPL(lm3533_read);
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int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
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{
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int ret;
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dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
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ret = regmap_write(lm3533->regmap, reg, val);
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if (ret < 0) {
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dev_err(lm3533->dev, "failed to write register %02x: %d\n",
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reg, ret);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(lm3533_write);
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int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
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{
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int ret;
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dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask);
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ret = regmap_update_bits(lm3533->regmap, reg, mask, val);
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if (ret < 0) {
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dev_err(lm3533->dev, "failed to update register %02x: %d\n",
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reg, ret);
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(lm3533_update);
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static int lm3533_set_boost_freq(struct lm3533 *lm3533,
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enum lm3533_boost_freq freq)
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{
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int ret;
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ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
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freq << LM3533_BOOST_FREQ_SHIFT,
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LM3533_BOOST_FREQ_MASK);
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if (ret)
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dev_err(lm3533->dev, "failed to set boost frequency\n");
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return ret;
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}
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static int lm3533_set_boost_ovp(struct lm3533 *lm3533,
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enum lm3533_boost_ovp ovp)
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{
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int ret;
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ret = lm3533_update(lm3533, LM3533_REG_BOOST_PWM,
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ovp << LM3533_BOOST_OVP_SHIFT,
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LM3533_BOOST_OVP_MASK);
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if (ret)
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dev_err(lm3533->dev, "failed to set boost ovp\n");
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return ret;
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}
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/*
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* HVLED output config -- output hvled controlled by backlight bl
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*/
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static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl)
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{
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u8 val;
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u8 mask;
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int shift;
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int ret;
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if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX)
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return -EINVAL;
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if (bl > LM3533_BL_ID_MAX)
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return -EINVAL;
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shift = hvled - 1;
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mask = LM3533_BL_ID_MASK << shift;
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val = bl << shift;
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ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask);
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if (ret)
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dev_err(lm3533->dev, "failed to set hvled config\n");
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return ret;
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}
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/*
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* LVLED output config -- output lvled controlled by LED led
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*/
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static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led)
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{
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u8 reg;
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u8 val;
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u8 mask;
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int shift;
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int ret;
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if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX)
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return -EINVAL;
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if (led > LM3533_LED_ID_MAX)
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return -EINVAL;
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if (lvled < 4) {
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reg = LM3533_REG_OUTPUT_CONF1;
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shift = 2 * lvled;
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} else {
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reg = LM3533_REG_OUTPUT_CONF2;
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shift = 2 * (lvled - 4);
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}
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mask = LM3533_LED_ID_MASK << shift;
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val = led << shift;
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ret = lm3533_update(lm3533, reg, val, mask);
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if (ret)
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dev_err(lm3533->dev, "failed to set lvled config\n");
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return ret;
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}
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static void lm3533_enable(struct lm3533 *lm3533)
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{
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if (gpio_is_valid(lm3533->gpio_hwen))
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gpio_set_value(lm3533->gpio_hwen, 1);
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}
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static void lm3533_disable(struct lm3533 *lm3533)
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{
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if (gpio_is_valid(lm3533->gpio_hwen))
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gpio_set_value(lm3533->gpio_hwen, 0);
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}
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enum lm3533_attribute_type {
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LM3533_ATTR_TYPE_BACKLIGHT,
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LM3533_ATTR_TYPE_LED,
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};
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struct lm3533_device_attribute {
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struct device_attribute dev_attr;
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enum lm3533_attribute_type type;
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union {
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struct {
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u8 id;
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} output;
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} u;
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};
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#define to_lm3533_dev_attr(_attr) \
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container_of(_attr, struct lm3533_device_attribute, dev_attr)
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static ssize_t show_output(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
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int id = lattr->u.output.id;
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u8 reg;
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u8 val;
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u8 mask;
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int shift;
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int ret;
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if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) {
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reg = LM3533_REG_OUTPUT_CONF1;
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shift = id - 1;
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mask = LM3533_BL_ID_MASK << shift;
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} else {
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if (id < 4) {
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reg = LM3533_REG_OUTPUT_CONF1;
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shift = 2 * id;
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} else {
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reg = LM3533_REG_OUTPUT_CONF2;
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shift = 2 * (id - 4);
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}
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mask = LM3533_LED_ID_MASK << shift;
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}
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ret = lm3533_read(lm3533, reg, &val);
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if (ret)
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return ret;
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val = (val & mask) >> shift;
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return scnprintf(buf, PAGE_SIZE, "%u\n", val);
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}
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static ssize_t store_output(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t len)
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{
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr);
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int id = lattr->u.output.id;
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u8 val;
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int ret;
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if (kstrtou8(buf, 0, &val))
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return -EINVAL;
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if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT)
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ret = lm3533_set_hvled_config(lm3533, id, val);
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else
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ret = lm3533_set_lvled_config(lm3533, id, val);
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if (ret)
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return ret;
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return len;
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}
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#define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \
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struct lm3533_device_attribute lm3533_dev_attr_##_name = \
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{ .dev_attr = __ATTR(_name, _mode, _show, _store), \
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.type = _type, \
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.u.output = { .id = _id }, }
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#define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \
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LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \
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show_output, store_output, _type, _id)
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#define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \
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LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr)
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#define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \
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LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr)
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/*
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* Output config:
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*
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* output_hvled<nr> 0-1
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* output_lvled<nr> 0-3
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*/
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static LM3533_OUTPUT_HVLED_ATTR_RW(1);
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static LM3533_OUTPUT_HVLED_ATTR_RW(2);
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static LM3533_OUTPUT_LVLED_ATTR_RW(1);
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static LM3533_OUTPUT_LVLED_ATTR_RW(2);
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static LM3533_OUTPUT_LVLED_ATTR_RW(3);
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static LM3533_OUTPUT_LVLED_ATTR_RW(4);
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static LM3533_OUTPUT_LVLED_ATTR_RW(5);
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static struct attribute *lm3533_attributes[] = {
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&lm3533_dev_attr_output_hvled1.dev_attr.attr,
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&lm3533_dev_attr_output_hvled2.dev_attr.attr,
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&lm3533_dev_attr_output_lvled1.dev_attr.attr,
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&lm3533_dev_attr_output_lvled2.dev_attr.attr,
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&lm3533_dev_attr_output_lvled3.dev_attr.attr,
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&lm3533_dev_attr_output_lvled4.dev_attr.attr,
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&lm3533_dev_attr_output_lvled5.dev_attr.attr,
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NULL,
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};
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#define to_dev_attr(_attr) \
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container_of(_attr, struct device_attribute, attr)
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static umode_t lm3533_attr_is_visible(struct kobject *kobj,
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struct attribute *attr, int n)
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{
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struct device *dev = kobj_to_dev(kobj);
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struct lm3533 *lm3533 = dev_get_drvdata(dev);
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struct device_attribute *dattr = to_dev_attr(attr);
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struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr);
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enum lm3533_attribute_type type = lattr->type;
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umode_t mode = attr->mode;
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if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT)
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mode = 0;
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else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED)
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mode = 0;
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return mode;
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};
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static struct attribute_group lm3533_attribute_group = {
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.is_visible = lm3533_attr_is_visible,
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.attrs = lm3533_attributes
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};
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static int lm3533_device_als_init(struct lm3533 *lm3533)
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{
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struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
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int ret;
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if (!pdata->als)
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return 0;
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lm3533_als_devs[0].platform_data = pdata->als;
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lm3533_als_devs[0].pdata_size = sizeof(*pdata->als);
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ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL,
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0, NULL);
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if (ret) {
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dev_err(lm3533->dev, "failed to add ALS device\n");
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return ret;
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}
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lm3533->have_als = 1;
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return 0;
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}
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static int lm3533_device_bl_init(struct lm3533 *lm3533)
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{
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struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
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int i;
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int ret;
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if (!pdata->backlights || pdata->num_backlights == 0)
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return 0;
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if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs))
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pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs);
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for (i = 0; i < pdata->num_backlights; ++i) {
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lm3533_bl_devs[i].platform_data = &pdata->backlights[i];
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lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]);
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}
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ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs,
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pdata->num_backlights, NULL, 0, NULL);
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if (ret) {
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dev_err(lm3533->dev, "failed to add backlight devices\n");
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return ret;
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}
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lm3533->have_backlights = 1;
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return 0;
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}
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static int lm3533_device_led_init(struct lm3533 *lm3533)
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{
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struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
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int i;
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int ret;
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if (!pdata->leds || pdata->num_leds == 0)
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return 0;
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if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs))
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pdata->num_leds = ARRAY_SIZE(lm3533_led_devs);
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for (i = 0; i < pdata->num_leds; ++i) {
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lm3533_led_devs[i].platform_data = &pdata->leds[i];
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lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]);
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}
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ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs,
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pdata->num_leds, NULL, 0, NULL);
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if (ret) {
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dev_err(lm3533->dev, "failed to add LED devices\n");
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return ret;
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}
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lm3533->have_leds = 1;
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return 0;
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}
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static int lm3533_device_setup(struct lm3533 *lm3533,
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struct lm3533_platform_data *pdata)
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{
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int ret;
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ret = lm3533_set_boost_freq(lm3533, pdata->boost_freq);
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if (ret)
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return ret;
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return lm3533_set_boost_ovp(lm3533, pdata->boost_ovp);
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}
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static int lm3533_device_init(struct lm3533 *lm3533)
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{
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struct lm3533_platform_data *pdata = dev_get_platdata(lm3533->dev);
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int ret;
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dev_dbg(lm3533->dev, "%s\n", __func__);
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if (!pdata) {
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dev_err(lm3533->dev, "no platform data\n");
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return -EINVAL;
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}
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lm3533->gpio_hwen = pdata->gpio_hwen;
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dev_set_drvdata(lm3533->dev, lm3533);
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if (gpio_is_valid(lm3533->gpio_hwen)) {
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ret = devm_gpio_request_one(lm3533->dev, lm3533->gpio_hwen,
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GPIOF_OUT_INIT_LOW, "lm3533-hwen");
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if (ret < 0) {
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dev_err(lm3533->dev,
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"failed to request HWEN GPIO %d\n",
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lm3533->gpio_hwen);
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return ret;
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}
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}
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lm3533_enable(lm3533);
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ret = lm3533_device_setup(lm3533, pdata);
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if (ret)
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goto err_disable;
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lm3533_device_als_init(lm3533);
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lm3533_device_bl_init(lm3533);
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lm3533_device_led_init(lm3533);
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ret = sysfs_create_group(&lm3533->dev->kobj, &lm3533_attribute_group);
|
|
if (ret < 0) {
|
|
dev_err(lm3533->dev, "failed to create sysfs attributes\n");
|
|
goto err_unregister;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_unregister:
|
|
mfd_remove_devices(lm3533->dev);
|
|
err_disable:
|
|
lm3533_disable(lm3533);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void lm3533_device_exit(struct lm3533 *lm3533)
|
|
{
|
|
dev_dbg(lm3533->dev, "%s\n", __func__);
|
|
|
|
sysfs_remove_group(&lm3533->dev->kobj, &lm3533_attribute_group);
|
|
|
|
mfd_remove_devices(lm3533->dev);
|
|
lm3533_disable(lm3533);
|
|
}
|
|
|
|
static bool lm3533_readable_register(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case 0x10 ... 0x2c:
|
|
case 0x30 ... 0x38:
|
|
case 0x40 ... 0x45:
|
|
case 0x50 ... 0x57:
|
|
case 0x60 ... 0x6e:
|
|
case 0x70 ... 0x75:
|
|
case 0x80 ... 0x85:
|
|
case 0x90 ... 0x95:
|
|
case 0xa0 ... 0xa5:
|
|
case 0xb0 ... 0xb2:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool lm3533_volatile_register(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case 0x34 ... 0x36: /* zone */
|
|
case 0x37 ... 0x38: /* adc */
|
|
case 0xb0 ... 0xb1: /* fault */
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool lm3533_precious_register(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case 0x34: /* zone */
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.max_register = LM3533_REG_MAX,
|
|
.readable_reg = lm3533_readable_register,
|
|
.volatile_reg = lm3533_volatile_register,
|
|
.precious_reg = lm3533_precious_register,
|
|
};
|
|
|
|
static int lm3533_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct lm3533 *lm3533;
|
|
|
|
dev_dbg(&i2c->dev, "%s\n", __func__);
|
|
|
|
lm3533 = devm_kzalloc(&i2c->dev, sizeof(*lm3533), GFP_KERNEL);
|
|
if (!lm3533)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(i2c, lm3533);
|
|
|
|
lm3533->regmap = devm_regmap_init_i2c(i2c, ®map_config);
|
|
if (IS_ERR(lm3533->regmap))
|
|
return PTR_ERR(lm3533->regmap);
|
|
|
|
lm3533->dev = &i2c->dev;
|
|
lm3533->irq = i2c->irq;
|
|
|
|
return lm3533_device_init(lm3533);
|
|
}
|
|
|
|
static void lm3533_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
struct lm3533 *lm3533 = i2c_get_clientdata(i2c);
|
|
|
|
dev_dbg(&i2c->dev, "%s\n", __func__);
|
|
|
|
lm3533_device_exit(lm3533);
|
|
}
|
|
|
|
static const struct i2c_device_id lm3533_i2c_ids[] = {
|
|
{ "lm3533", 0 },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, lm3533_i2c_ids);
|
|
|
|
static struct i2c_driver lm3533_i2c_driver = {
|
|
.driver = {
|
|
.name = "lm3533",
|
|
},
|
|
.id_table = lm3533_i2c_ids,
|
|
.probe = lm3533_i2c_probe,
|
|
.remove = lm3533_i2c_remove,
|
|
};
|
|
|
|
static int __init lm3533_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&lm3533_i2c_driver);
|
|
}
|
|
subsys_initcall(lm3533_i2c_init);
|
|
|
|
static void __exit lm3533_i2c_exit(void)
|
|
{
|
|
i2c_del_driver(&lm3533_i2c_driver);
|
|
}
|
|
module_exit(lm3533_i2c_exit);
|
|
|
|
MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
|
|
MODULE_DESCRIPTION("LM3533 Core");
|
|
MODULE_LICENSE("GPL");
|