diff options
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533 | 38 | ||||
| -rw-r--r-- | drivers/mfd/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/mfd/Makefile | 1 | ||||
| -rw-r--r-- | drivers/mfd/lm3533-core.c | 717 | ||||
| -rw-r--r-- | drivers/mfd/lm3533-ctrlbank.c | 134 | ||||
| -rw-r--r-- | include/linux/mfd/lm3533.h | 89 |
6 files changed, 992 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533 b/Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533 new file mode 100644 index 0000000..5700721 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533 @@ -0,0 +1,38 @@ +What: /sys/bus/i2c/devices/.../boost_freq +Date: April 2012 +KernelVersion: 3.5 +Contact: Johan Hovold <jhovold@gmail.com> +Description: + Set the boost converter switching frequency (0, 1), where + + 0 - 500Hz + 1 - 1000Hz + +What: /sys/bus/i2c/devices/.../boost_ovp +Date: April 2012 +KernelVersion: 3.5 +Contact: Johan Hovold <jhovold@gmail.com> +Description: + Set the boost converter over-voltage protection threshold + (0..3), where + + 0 - 16V + 1 - 24V + 2 - 32V + 3 - 40V + +What: /sys/bus/i2c/devices/.../output_hvled[n] +Date: April 2012 +KernelVersion: 3.5 +Contact: Johan Hovold <jhovold@gmail.com> +Description: + Set the controlling backlight device for high-voltage current + sink HVLED[n] (n = 1, 2) (0, 1). + +What: /sys/bus/i2c/devices/.../output_lvled[n] +Date: April 2012 +KernelVersion: 3.5 +Contact: Johan Hovold <jhovold@gmail.com> +Description: + Set the controlling led device for low-voltage current sink + LVLED[n] (n = 1..5) (0..3). diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 48eed22..211f5de 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -106,6 +106,19 @@ config UCB1400_CORE To compile this driver as a module, choose M here: the module will be called ucb1400_core. +config MFD_LM3533 + tristate "LM3533 Lighting Power chip" + depends on I2C + select MFD_CORE + select REGMAP_I2C + help + Say yes here to enable support for National Semiconductor / TI + LM3533 Lighting Power chips. + + This driver provides common support for accessing the device; + additional drivers must be enabled in order to use the LED, + backlight or ambient-light-sensor functionality of the device. + config TPS6105X tristate "TPS61050/61052 Boost Converters" depends on I2C diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 0dc55cb..d3dae95 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -120,3 +120,4 @@ obj-$(CONFIG_MFD_INTEL_MSIC) += intel_msic.o obj-$(CONFIG_MFD_RC5T583) += rc5t583.o rc5t583-irq.o obj-$(CONFIG_MFD_S5M_CORE) += s5m-core.o s5m-irq.o obj-$(CONFIG_MFD_ANATOP) += anatop-mfd.o +obj-$(CONFIG_MFD_LM3533) += lm3533-core.o lm3533-ctrlbank.o diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c new file mode 100644 index 0000000..75f4b7f --- /dev/null +++ b/drivers/mfd/lm3533-core.c @@ -0,0 +1,717 @@ +/* + * lm3533-core.c -- LM3533 Core + * + * Copyright (C) 2011-2012 Texas Instruments + * + * Author: Johan Hovold <jhovold@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/err.h> +#include <linux/gpio.h> +#include <linux/i2c.h> +#include <linux/mfd/core.h> +#include <linux/regmap.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/uaccess.h> + +#include <linux/mfd/lm3533.h> + + +#define LM3533_BOOST_OVP_MAX 0x03 +#define LM3533_BOOST_OVP_MASK 0x06 +#define LM3533_BOOST_OVP_SHIFT 1 + +#define LM3533_BOOST_FREQ_MAX 0x01 +#define LM3533_BOOST_FREQ_MASK 0x01 +#define LM3533_BOOST_FREQ_SHIFT 0 + +#define LM3533_BL_ID_MASK 1 +#define LM3533_LED_ID_MASK 3 +#define LM3533_BL_ID_MAX 1 +#define LM3533_LED_ID_MAX 3 + +#define LM3533_HVLED_ID_MAX 2 +#define LM3533_LVLED_ID_MAX 5 + +#define LM3533_REG_OUTPUT_CONF1 0x10 +#define LM3533_REG_OUTPUT_CONF2 0x11 +#define LM3533_REG_BOOST_PWM 0x2c + +#define LM3533_REG_MAX 0xb2 + + +static struct mfd_cell lm3533_als_devs[] = { + { + .name = "lm3533-als", + .id = -1, + }, +}; + +static struct mfd_cell lm3533_bl_devs[] = { + { + .name = "lm3533-backlight", + .id = 0, + }, + { + .name = "lm3533-backlight", + .id = 1, + }, +}; + +static struct mfd_cell lm3533_led_devs[] = { + { + .name = "lm3533-leds", + .id = 0, + }, + { + .name = "lm3533-leds", + .id = 1, + }, + { + .name = "lm3533-leds", + .id = 2, + }, + { + .name = "lm3533-leds", + .id = 3, + }, +}; + +int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val) +{ + int tmp; + int ret; + + ret = regmap_read(lm3533->regmap, reg, &tmp); + if (ret < 0) { + dev_err(lm3533->dev, "failed to read register %02x: %d\n", + reg, ret); + return ret; + } + + *val = tmp; + + dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val); + + return ret; +} +EXPORT_SYMBOL_GPL(lm3533_read); + +int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val) +{ + int ret; + + dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val); + + ret = regmap_write(lm3533->regmap, reg, val); + if (ret < 0) { + dev_err(lm3533->dev, "failed to write register %02x: %d\n", + reg, ret); + } + + return ret; +} +EXPORT_SYMBOL_GPL(lm3533_write); + +int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask) +{ + int ret; + + dev_dbg(lm3533->dev, "update [%02x]: %02x/%02x\n", reg, val, mask); + + ret = regmap_update_bits(lm3533->regmap, reg, val, mask); + if (ret < 0) { + dev_err(lm3533->dev, "failed to update register %02x: %d\n", + reg, ret); + } + + return ret; +} +EXPORT_SYMBOL_GPL(lm3533_update); + +/* + * HVLED output config -- output hvled controlled by backlight bl + */ +static int lm3533_set_hvled_config(struct lm3533 *lm3533, u8 hvled, u8 bl) +{ + u8 val; + u8 mask; + int shift; + int ret; + + if (hvled == 0 || hvled > LM3533_HVLED_ID_MAX) + return -EINVAL; + + if (bl > LM3533_BL_ID_MAX) + return -EINVAL; + + shift = hvled - 1; + mask = LM3533_BL_ID_MASK << shift; + val = bl << shift; + + ret = lm3533_update(lm3533, LM3533_REG_OUTPUT_CONF1, val, mask); + if (ret) + dev_err(lm3533->dev, "failed to set hvled config\n"); + + return ret; +} + +/* + * LVLED output config -- output lvled controlled by LED led + */ +static int lm3533_set_lvled_config(struct lm3533 *lm3533, u8 lvled, u8 led) +{ + u8 reg; + u8 val; + u8 mask; + int shift; + int ret; + + if (lvled == 0 || lvled > LM3533_LVLED_ID_MAX) + return -EINVAL; + + if (led > LM3533_LED_ID_MAX) + return -EINVAL; + + if (lvled < 4) { + reg = LM3533_REG_OUTPUT_CONF1; + shift = 2 * lvled; + } else { + reg = LM3533_REG_OUTPUT_CONF2; + shift = 2 * (lvled - 4); + } + + mask = LM3533_LED_ID_MASK << shift; + val = led << shift; + + ret = lm3533_update(lm3533, reg, val, mask); + if (ret) + dev_err(lm3533->dev, "failed to set lvled config\n"); + + return ret; +} + +static void lm3533_enable(struct lm3533 *lm3533) +{ + if (gpio_is_valid(lm3533->gpio_hwen)) + gpio_set_value(lm3533->gpio_hwen, 1); +} + +static void lm3533_disable(struct lm3533 *lm3533) +{ + if (gpio_is_valid(lm3533->gpio_hwen)) + gpio_set_value(lm3533->gpio_hwen, 0); +} + +enum lm3533_attribute_type { + LM3533_ATTR_TYPE_BACKLIGHT, + LM3533_ATTR_TYPE_LED, +}; + +struct lm3533_device_attribute { + struct device_attribute dev_attr; + enum lm3533_attribute_type type; + union { + struct { + u8 id; + } output; + struct { + u8 reg; + u8 shift; + u8 mask; + u8 max; + } generic; + } u; +}; + +#define to_lm3533_dev_attr(_attr) \ + container_of(_attr, struct lm3533_device_attribute, dev_attr) + +static ssize_t show_lm3533_reg(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm3533 *lm3533 = dev_get_drvdata(dev); + struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr); + u8 val; + int ret; + + ret = lm3533_read(lm3533, lattr->u.generic.reg, &val); + if (ret) + return ret; + + val = (val & lattr->u.generic.mask) >> lattr->u.generic.shift; + + return scnprintf(buf, PAGE_SIZE, "%u\n", val); +} + +static ssize_t store_lm3533_reg(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lm3533 *lm3533 = dev_get_drvdata(dev); + struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr); + u8 val; + int ret; + + if (kstrtou8(buf, 0, &val) || val > lattr->u.generic.max) + return -EINVAL; + + val = val << lattr->u.generic.shift; + ret = lm3533_update(lm3533, lattr->u.generic.reg, val, + lattr->u.generic.mask); + if (ret) + return ret; + + return len; +} + +#define GENERIC_ATTR(_reg, _max, _mask, _shift) \ + { .reg = _reg, \ + .max = _max, \ + .mask = _mask, \ + .shift = _shift } + +#define LM3533_GENERIC_ATTR(_name, _mode, _show, _store, _type, \ + _reg, _max, _mask, _shift) \ + struct lm3533_device_attribute lm3533_dev_attr_##_name = { \ + .dev_attr = __ATTR(_name, _mode, _show, _store), \ + .type = _type, \ + .u.generic = GENERIC_ATTR(_reg, _max, _mask, _shift) } + +#define LM3533_GENERIC_ATTR_RW(_name, _type, _reg, _max, _mask, _shift) \ + LM3533_GENERIC_ATTR(_name, S_IRUGO | S_IWUSR, \ + show_lm3533_reg, store_lm3533_reg, \ + _type, _reg, _max, _mask, _shift) + +#define LM3533_BOOST_ATTR_RW(_name, _NAME) \ + LM3533_GENERIC_ATTR_RW(_name, LM3533_ATTR_TYPE_BACKLIGHT, \ + LM3533_REG_BOOST_PWM, LM3533_##_NAME##_MAX, \ + LM3533_##_NAME##_MASK, LM3533_##_NAME##_SHIFT) +/* + * Boost Over Voltage Protection Select + * + * 0 - 16 V (default) + * 1 - 24 V + * 2 - 32 V + * 3 - 40 V + */ +static LM3533_BOOST_ATTR_RW(boost_ovp, BOOST_OVP); + +/* + * Boost Frequency Select + * + * 0 - 500 kHz (default) + * 1 - 1 MHz + */ +static LM3533_BOOST_ATTR_RW(boost_freq, BOOST_FREQ); + +static ssize_t show_output(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct lm3533 *lm3533 = dev_get_drvdata(dev); + struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr); + int id = lattr->u.output.id; + u8 reg; + u8 val; + u8 mask; + int shift; + int ret; + + if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) { + reg = LM3533_REG_OUTPUT_CONF1; + shift = id - 1; + mask = LM3533_BL_ID_MASK << shift; + } else { + if (id < 4) { + reg = LM3533_REG_OUTPUT_CONF1; + shift = 2 * id; + } else { + reg = LM3533_REG_OUTPUT_CONF2; + shift = 2 * (id - 4); + } + mask = LM3533_LED_ID_MASK << shift; + } + + ret = lm3533_read(lm3533, reg, &val); + if (ret) + return ret; + + val = (val & mask) >> shift; + + return scnprintf(buf, PAGE_SIZE, "%u\n", val); +} + +static ssize_t store_output(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t len) +{ + struct lm3533 *lm3533 = dev_get_drvdata(dev); + struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(attr); + int id = lattr->u.output.id; + u8 val; + int ret; + + if (kstrtou8(buf, 0, &val)) + return -EINVAL; + + if (lattr->type == LM3533_ATTR_TYPE_BACKLIGHT) + ret = lm3533_set_hvled_config(lm3533, id, val); + else + ret = lm3533_set_lvled_config(lm3533, id, val); + + if (ret) + return ret; + + return len; +} + +#define LM3533_OUTPUT_ATTR(_name, _mode, _show, _store, _type, _id) \ + struct lm3533_device_attribute lm3533_dev_attr_##_name = \ + { .dev_attr = __ATTR(_name, _mode, _show, _store), \ + .type = _type, \ + .u.output = { .id = _id }, } + +#define LM3533_OUTPUT_ATTR_RW(_name, _type, _id) \ + LM3533_OUTPUT_ATTR(output_##_name, S_IRUGO | S_IWUSR, \ + show_output, store_output, _type, _id) + +#define LM3533_OUTPUT_HVLED_ATTR_RW(_nr) \ + LM3533_OUTPUT_ATTR_RW(hvled##_nr, LM3533_ATTR_TYPE_BACKLIGHT, _nr) +#define LM3533_OUTPUT_LVLED_ATTR_RW(_nr) \ + LM3533_OUTPUT_ATTR_RW(lvled##_nr, LM3533_ATTR_TYPE_LED, _nr) +/* + * Output config: + * + * output_hvled<nr> 0-1 + * output_lvled<nr> 0-3 + */ +static LM3533_OUTPUT_HVLED_ATTR_RW(1); +static LM3533_OUTPUT_HVLED_ATTR_RW(2); +static LM3533_OUTPUT_LVLED_ATTR_RW(1); +static LM3533_OUTPUT_LVLED_ATTR_RW(2); +static LM3533_OUTPUT_LVLED_ATTR_RW(3); +static LM3533_OUTPUT_LVLED_ATTR_RW(4); +static LM3533_OUTPUT_LVLED_ATTR_RW(5); + +static struct attribute *lm3533_attributes[] = { + &lm3533_dev_attr_boost_freq.dev_attr.attr, + &lm3533_dev_attr_boost_ovp.dev_attr.attr, + &lm3533_dev_attr_output_hvled1.dev_attr.attr, + &lm3533_dev_attr_output_hvled2.dev_attr.attr, + &lm3533_dev_attr_output_lvled1.dev_attr.attr, + &lm3533_dev_attr_output_lvled2.dev_attr.attr, + &lm3533_dev_attr_output_lvled3.dev_attr.attr, + &lm3533_dev_attr_output_lvled4.dev_attr.attr, + &lm3533_dev_attr_output_lvled5.dev_attr.attr, + NULL, +}; + +#define to_dev_attr(_attr) \ + container_of(_attr, struct device_attribute, attr) + +static mode_t lm3533_attr_is_visible(struct kobject *kobj, + struct attribute *attr, int n) +{ + struct device *dev = container_of(kobj, struct device, kobj); + struct lm3533 *lm3533 = dev_get_drvdata(dev); + struct device_attribute *dattr = to_dev_attr(attr); + struct lm3533_device_attribute *lattr = to_lm3533_dev_attr(dattr); + enum lm3533_attribute_type type = lattr->type; + mode_t mode = attr->mode; + + if (!lm3533->have_backlights && type == LM3533_ATTR_TYPE_BACKLIGHT) + mode = 0; + else if (!lm3533->have_leds && type == LM3533_ATTR_TYPE_LED) + mode = 0; + + return mode; +}; + +static struct attribute_group lm3533_attribute_group = { + .is_visible = lm3533_attr_is_visible, + .attrs = lm3533_attributes +}; + +static int __devinit lm3533_device_als_init(struct lm3533 *lm3533) +{ + struct lm3533_platform_data *pdata = lm3533->dev->platform_data; + int ret; + + if (!pdata->als) + return 0; + + lm3533_als_devs[0].platform_data = pdata->als; + lm3533_als_devs[0].pdata_size = sizeof(*pdata->als); + + ret = mfd_add_devices(lm3533->dev, 0, lm3533_als_devs, 1, NULL, 0); + if (ret) { + dev_err(lm3533->dev, "failed to add ALS device\n"); + return ret; + } + + lm3533->have_als = 1; + + return 0; +} + +static int __devinit lm3533_device_bl_init(struct lm3533 *lm3533) +{ + struct lm3533_platform_data *pdata = lm3533->dev->platform_data; + int i; + int ret; + + if (!pdata->backlights || pdata->num_backlights == 0) + return 0; + + if (pdata->num_backlights > ARRAY_SIZE(lm3533_bl_devs)) + pdata->num_backlights = ARRAY_SIZE(lm3533_bl_devs); + + for (i = 0; i < pdata->num_backlights; ++i) { + lm3533_bl_devs[i].platform_data = &pdata->backlights[i]; + lm3533_bl_devs[i].pdata_size = sizeof(pdata->backlights[i]); + } + + ret = mfd_add_devices(lm3533->dev, 0, lm3533_bl_devs, + pdata->num_backlights, NULL, 0); + if (ret) { + dev_err(lm3533->dev, "failed to add backlight devices\n"); + return ret; + } + + lm3533->have_backlights = 1; + + return 0; +} + +static int __devinit lm3533_device_led_init(struct lm3533 *lm3533) +{ + struct lm3533_platform_data *pdata = lm3533->dev->platform_data; + int i; + int ret; + + if (!pdata->leds || pdata->num_leds == 0) + return 0; + + if (pdata->num_leds > ARRAY_SIZE(lm3533_led_devs)) + pdata->num_leds = ARRAY_SIZE(lm3533_led_devs); + + for (i = 0; i < pdata->num_leds; ++i) { + lm3533_led_devs[i].platform_data = &pdata->leds[i]; + lm3533_led_devs[i].pdata_size = sizeof(pdata->leds[i]); + } + + ret = mfd_add_devices(lm3533->dev, 0, lm3533_led_devs, + pdata->num_leds, NULL, 0); + if (ret) { + dev_err(lm3533->dev, "failed to add LED devices\n"); + return ret; + } + + lm3533->have_leds = 1; + + return 0; +} + +static int __devinit lm3533_device_init(struct lm3533 *lm3533) +{ + struct lm3533_platform_data *pdata = lm3533->dev->platform_data; + int ret; + + dev_dbg(lm3533->dev, "%s\n", __func__); + + if (!pdata) { + dev_err(lm3533->dev, "no platform data\n"); + return -EINVAL; + } + + lm3533->gpio_hwen = pdata->gpio_hwen; + + dev_set_drvdata(lm3533->dev, lm3533); + + if (gpio_is_valid(lm3533->gpio_hwen)) { + ret = gpio_request_one(lm3533->gpio_hwen, GPIOF_OUT_INIT_LOW, + "lm3533-hwen"); + if (ret < 0) { + dev_err(lm3533->dev, + "failed to request HWEN GPIO %d\n", + lm3533->gpio_hwen); + return ret; + } + } + + lm3533_enable(lm3533); + + lm3533_device_als_init(lm3533); + lm3533_device_bl_init(lm3533); + lm3533_device_led_init(lm3533); + + 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); + lm3533_disable(lm3533); + if (gpio_is_valid(lm3533->gpio_hwen)) + gpio_free(lm3533->gpio_hwen); + + return ret; +} + +static void __devexit 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); + if (gpio_is_valid(lm3533->gpio_hwen)) + gpio_free(lm3533->gpio_hwen); +} + +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: /* 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 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 __devinit lm3533_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct lm3533 *lm3533; + int ret; + + dev_dbg(&i2c->dev, "%s\n", __func__); + + lm3533 = kzalloc(sizeof(*lm3533), GFP_KERNEL); + if (!lm3533) + return -ENOMEM; + + i2c_set_clientdata(i2c, lm3533); + + lm3533->regmap = regmap_init_i2c(i2c, ®map_config); + if (IS_ERR(lm3533->regmap)) { + ret = PTR_ERR(lm3533->regmap); + goto err_regmap; + } + + lm3533->dev = &i2c->dev; + lm3533->irq = i2c->irq; + + ret = lm3533_device_init(lm3533); + if (ret) + goto err_dev; + + return 0; + +err_dev: + regmap_exit(lm3533->regmap); +err_regmap: + kfree(lm3533); + + return ret; +} + +static int __devexit 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); + regmap_exit(lm3533->regmap); + + kfree(lm3533); + + return 0; +} + +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", + .owner = THIS_MODULE, + }, + .id_table = lm3533_i2c_ids, + .probe = lm3533_i2c_probe, + .remove = __devexit_p(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"); diff --git a/drivers/mfd/lm3533-ctrlbank.c b/drivers/mfd/lm3533-ctrlbank.c new file mode 100644 index 0000000..c2732a3 --- /dev/null +++ b/drivers/mfd/lm3533-ctrlbank.c @@ -0,0 +1,134 @@ +/* + * lm3533-ctrlbank.c -- LM3533 Generic Control Bank interface + * + * Copyright (C) 2011-2012 Texas Instruments + * + * Author: Johan Hovold <jhovold@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#include <linux/device.h> +#include <linux/module.h> + +#include <linux/mfd/lm3533.h> + + +#define LM3533_BRIGHTNESS_MAX 255 +#define LM3533_MAX_CURRENT_MAX 31 +#define LM3533_PWM_MAX 0x3f + +#define LM3533_REG_PWM_BASE 0x14 +#define LM3533_REG_MAX_CURRENT_BASE 0x1f +#define LM3533_REG_CTRLBANK_ENABLE 0x27 +#define LM3533_REG_BRIGHTNESS_BASE 0x40 + + +static inline u8 lm3533_ctrlbank_get_reg(struct lm3533_ctrlbank *cb, u8 base) +{ + return base + cb->id; +} + +int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb) +{ + u8 mask; + int ret; + + dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); + + mask = 1 << cb->id; + ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, + mask, mask); + if (ret) + dev_err(cb->dev, "failed to enable ctrlbank %d\n", cb->id); + + return ret; +} +EXPORT_SYMBOL_GPL(lm3533_ctrlbank_enable); + +int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb) +{ + u8 mask; + int ret; + + dev_dbg(cb->dev, "%s - %d\n", __func__, cb->id); + + mask = 1 << cb->id; + ret = lm3533_update(cb->lm3533, LM3533_REG_CTRLBANK_ENABLE, 0, mask); + if (ret) + dev_err(cb->dev, "failed to disable ctrlbank %d\n", cb->id); + + return ret; +} +EXPORT_SYMBOL_GPL(lm3533_ctrlbank_disable); + +#define lm3533_ctrlbank_set(_name, _NAME) \ +int lm3533_ctrlbank_set_##_name(struct lm3533_ctrlbank *cb, u8 val) \ +{ \ + u8 reg; \ + int ret; \ + \ + if (val > LM3533_##_NAME##_MAX) \ + return -EINVAL; \ + \ + reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \ + ret = lm3533_write(cb->lm3533, reg, val); \ + if (ret) \ + dev_err(cb->dev, "failed to set " #_name "\n"); \ + \ + return ret; \ +} \ +EXPORT_SYMBOL_GPL(lm3533_ctrlbank_set_##_name); + +#define lm3533_ctrlbank_get(_name, _NAME) \ +int lm3533_ctrlbank_get_##_name(struct lm3533_ctrlbank *cb, u8 *val) \ +{ \ + u8 reg; \ + int ret; \ + \ + reg = lm3533_ctrlbank_get_reg(cb, LM3533_REG_##_NAME##_BASE); \ + ret = lm3533_read(cb->lm3533, reg, val); \ + if (ret) \ + dev_err(cb->dev, "failed to get " #_name "\n"); \ + \ + return ret; \ +} \ +EXPORT_SYMBOL_GPL(lm3533_ctrlbank_get_##_name); + +lm3533_ctrlbank_set(brightness, BRIGHTNESS); +lm3533_ctrlbank_get(brightness, BRIGHTNESS); + +/* + * Full scale current. + * + * Imax = 5 + val * 0.8 mA, e.g.: + * + * 0 - 5 mA + * ... + * 19 - 20.2 mA (default) + * ... + * 31 - 29.8 mA + */ +lm3533_ctrlbank_set(max_current, MAX_CURRENT); +lm3533_ctrlbank_get(max_current, MAX_CURRENT); + +/* + * PWM-input control mask: + * + * bit 5 - PWM-input enabled in Zone 4 + * bit 4 - PWM-input enabled in Zone 3 + * bit 3 - PWM-input enabled in Zone 2 + * bit 2 - PWM-input enabled in Zone 1 + * bit 1 - PWM-input enabled in Zone 0 + * bit 0 - PWM-input enabled + */ +lm3533_ctrlbank_set(pwm, PWM); +lm3533_ctrlbank_get(pwm, PWM); + + +MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>"); +MODULE_DESCRIPTION("LM3533 Control Bank interface"); +MODULE_LICENSE("GPL"); diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h new file mode 100644 index 0000000..75f85f3 --- /dev/null +++ b/include/linux/mfd/lm3533.h @@ -0,0 +1,89 @@ +/* + * lm3533.h -- LM3533 interface + * + * Copyright (C) 2011-2012 Texas Instruments + * + * Author: Johan Hovold <jhovold@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef __LINUX_MFD_LM3533_H +#define __LINUX_MFD_LM3533_H + +#define LM3533_ATTR_RO(_name) \ + DEVICE_ATTR(_name, S_IRUGO, show_##_name, NULL) +#define LM3533_ATTR_RW(_name) \ + DEVICE_ATTR(_name, S_IRUGO | S_IWUSR , show_##_name, store_##_name) + +struct device; +struct regmap; + +struct lm3533 { + struct device *dev; + + struct regmap *regmap; + + int gpio_hwen; + int irq; + + unsigned have_als:1; + unsigned have_backlights:1; + unsigned have_leds:1; +}; + +struct lm3533_ctrlbank { + struct lm3533 *lm3533; + struct device *dev; + int id; +}; + +struct lm3533_als_platform_data { + unsigned pwm_mode:1; /* PWM input mode (default analog) */ +}; + +struct lm3533_bl_platform_data { + char *name; + u8 default_brightness; /* 0 - 255 */ + u8 max_current; /* 0 - 31 */ + u8 pwm; /* 0 - 0x3f */ +}; + +struct lm3533_led_platform_data { + char *name; + const char *default_trigger; + u8 max_current; /* 0 - 31 */ + u8 pwm; /* 0 - 0x3f */ +}; + +struct lm3533_platform_data { + int gpio_hwen; + + struct lm3533_als_platform_data *als; + + struct lm3533_bl_platform_data *backlights; + int num_backlights; + + struct lm3533_led_platform_data *leds; + int num_leds; +}; + +extern int lm3533_ctrlbank_enable(struct lm3533_ctrlbank *cb); +extern int lm3533_ctrlbank_disable(struct lm3533_ctrlbank *cb); + +extern int lm3533_ctrlbank_set_brightness(struct lm3533_ctrlbank *cb, u8 val); +extern int lm3533_ctrlbank_get_brightness(struct lm3533_ctrlbank *cb, u8 *val); +extern int lm3533_ctrlbank_set_max_current(struct lm3533_ctrlbank *cb, u8 val); +extern int lm3533_ctrlbank_get_max_current(struct lm3533_ctrlbank *cb, + u8 *val); +extern int lm3533_ctrlbank_set_pwm(struct lm3533_ctrlbank *cb, u8 val); +extern int lm3533_ctrlbank_get_pwm(struct lm3533_ctrlbank *cb, u8 *val); + +extern int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val); +extern int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val); +extern int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask); + +#endif /* __LINUX_MFD_LM3533_H */ |