mfd: Add LM3533 lighting-power core driver (16c5c023) · Commits · e / devices / android_kernel_fairphone_FP5

Documentation/ABI/testing/sysfs-bus-i2c-devices-lm3533

0 → 100644

+38 −0

Original line number	Diff line number	Diff line
		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).

drivers/mfd/Kconfig

+13 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/mfd/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/mfd/lm3533-core.c

0 → 100644

+717 −0

Original line number	Diff line number	Diff line
		/*
		* 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, &regmap_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");

drivers/mfd/lm3533-ctrlbank.c

0 → 100644

+134 −0

Original line number	Diff line number	Diff line
		/*
		* 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");