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Subject[PATCH 1/4] mfd: add LM3533 lighting-power core driver
Date
Add support for National Semiconductor / TI LM3533 lighting power chips.

This is the core driver which provides register access over I2C and
registers the ambient light sensor, LED and backlight sub-drivers.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
---
drivers/mfd/Kconfig | 12 +
drivers/mfd/Makefile | 3 +
drivers/mfd/lm3533-core.c | 738 +++++++++++++++++++++++++++++++++++++++++
drivers/mfd/lm3533-ctrlbank.c | 134 ++++++++
drivers/mfd/lm3533-i2c.c | 115 +++++++
include/linux/mfd/lm3533.h | 106 ++++++
6 files changed, 1108 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/lm3533-core.c
create mode 100644 drivers/mfd/lm3533-ctrlbank.c
create mode 100644 drivers/mfd/lm3533-i2c.c
create mode 100644 include/linux/mfd/lm3533.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 29f463c..e2760d9 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -106,6 +106,18 @@ 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
+ 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 05fa538..563fffa 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -15,6 +15,9 @@ obj-$(CONFIG_MFD_DAVINCI_VOICECODEC) += davinci_voicecodec.o
obj-$(CONFIG_MFD_DM355EVM_MSP) += dm355evm_msp.o
obj-$(CONFIG_MFD_TI_SSP) += ti-ssp.o

+lm3533-objs := lm3533-core.o lm3533-i2c.o
+obj-$(CONFIG_MFD_LM3533) += lm3533.o lm3533-ctrlbank.o
+
obj-$(CONFIG_MFD_STMPE) += stmpe.o
obj-$(CONFIG_STMPE_I2C) += stmpe-i2c.o
obj-$(CONFIG_STMPE_SPI) += stmpe-spi.o
diff --git a/drivers/mfd/lm3533-core.c b/drivers/mfd/lm3533-core.c
new file mode 100644
index 0000000..7a2d174
--- /dev/null
+++ b/drivers/mfd/lm3533-core.c
@@ -0,0 +1,738 @@
+/*
+ * 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/debugfs.h>
+#include <linux/gpio.h>
+#include <linux/mfd/core.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
+
+
+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,
+ },
+};
+
+static int __lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
+{
+ int ret;
+
+ ret = lm3533->read(lm3533, reg, val);
+ if (ret < 0) {
+ dev_err(lm3533->dev, "failed to read register %02x: %d\n",
+ reg, ret);
+ return ret;
+ }
+
+ dev_dbg(lm3533->dev, "read [%02x]: %02x\n", reg, *val);
+
+ return 0;
+}
+
+static int __lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
+{
+ int ret;
+
+ dev_dbg(lm3533->dev, "write [%02x]: %02x\n", reg, val);
+
+ ret = lm3533->write(lm3533, reg, val);
+ if (ret < 0) {
+ dev_err(lm3533->dev, "failed to write register %02x: %d\n",
+ reg, ret);
+ }
+
+ return ret;
+}
+
+int lm3533_read(struct lm3533 *lm3533, u8 reg, u8 *val)
+{
+ int ret;
+
+ mutex_lock(&lm3533->io_mutex);
+ ret = __lm3533_read(lm3533, reg, val);
+ mutex_unlock(&lm3533->io_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lm3533_read);
+
+int lm3533_write(struct lm3533 *lm3533, u8 reg, u8 val)
+{
+ int ret;
+
+ mutex_lock(&lm3533->io_mutex);
+ ret = __lm3533_write(lm3533, reg, val);
+ mutex_unlock(&lm3533->io_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(lm3533_write);
+
+int lm3533_update(struct lm3533 *lm3533, u8 reg, u8 val, u8 mask)
+{
+ u8 old_val;
+ u8 new_val;
+ int ret;
+
+ mutex_lock(&lm3533->io_mutex);
+ ret = __lm3533_read(lm3533, reg, &old_val);
+ if (ret)
+ goto out;
+ new_val = (old_val & ~mask) | (val & mask);
+ if (new_val != old_val)
+ ret = __lm3533_write(lm3533, reg, new_val);
+out:
+ mutex_unlock(&lm3533->io_mutex);
+
+ 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);
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+const struct {
+ u8 min;
+ u8 max;
+} lm3533_regs[] = {
+ { 0x10, 0x2c },
+ { 0x30, 0x38 },
+ { 0x40, 0x45 },
+ { 0x50, 0x57 },
+ { 0x60, 0x6e },
+ { 0x70, 0x75 },
+ { 0x80, 0x85 },
+ { 0x90, 0x95 },
+ { 0xa0, 0xa5 },
+ { 0xb0, 0xb2 },
+};
+
+static int lm3533_regs_show(struct seq_file *s, void *__unused)
+{
+ struct lm3533 *lm3533 = s->private;
+ u8 reg;
+ u8 val;
+ int ret;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(lm3533_regs); ++i) {
+ for (reg = lm3533_regs[i].min;
+ reg <= lm3533_regs[i].max; ++reg) {
+ ret = lm3533_read(lm3533, reg, &val);
+ if (ret)
+ return ret;
+
+ seq_printf(s, "[%02x]: %02x\n", reg, val);
+ }
+ }
+
+ return 0;
+}
+
+static int lm3533_regs_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, lm3533_regs_show, inode->i_private);
+}
+
+static int lm3533_set_reg_open(struct inode *inode, struct file *file)
+{
+ file->private_data = inode->i_private;
+
+ return 0;
+}
+
+static ssize_t lm3533_set_reg_write(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ struct lm3533 *lm3533 = file->private_data;
+ char buf[32];
+ int len;
+ unsigned reg;
+ unsigned val;
+ int ret;
+
+ len = min(count, sizeof(buf) - 1);
+ if (copy_from_user(buf, user_buf, len))
+ return -EFAULT;
+ buf[len] = 0;
+
+ if (sscanf(buf, "%x %x", &reg, &val) != 2)
+ return -EINVAL;
+
+ if (reg > 0xff || val > 0xff)
+ return -EINVAL;
+
+ ret = lm3533_write(lm3533, (u8)reg, (u8)val);
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+static const struct file_operations lm3533_regs_fops = {
+ .open = lm3533_regs_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static const struct file_operations lm3533_set_reg_fops = {
+ .open = lm3533_set_reg_open,
+ .write = lm3533_set_reg_write,
+};
+
+static void __devinit lm3533_debugfs_init(struct lm3533 *lm3533)
+{
+ struct dentry *d;
+
+ lm3533->debugfs_root = debugfs_create_dir("lm3533", NULL);
+ if (!lm3533->debugfs_root) {
+ dev_err(lm3533->dev, "failed to create debugfs root\n");
+ return;
+ }
+
+ d = debugfs_create_file("regs", 0444, lm3533->debugfs_root, lm3533,
+ &lm3533_regs_fops);
+ if (!d)
+ dev_err(lm3533->dev, "failed to create debugfs regs file\n");
+
+ d = debugfs_create_file("set_reg", 0644, lm3533->debugfs_root, lm3533,
+ &lm3533_set_reg_fops);
+ if (!d) {
+ dev_err(lm3533->dev,
+ "failed to create debugfs set_reg file\n");
+ }
+}
+
+static void __devexit lm3533_debugfs_cleanup(struct lm3533 *lm3533)
+{
+ debugfs_remove_recursive(lm3533->debugfs_root);
+}
+
+#else /* CONFIG_DEBUG_FS */
+static void lm3533_debugfs_init(struct lm3533 *lm3533) { }
+static void lm3533_debugfs_cleanup(struct lm3533 *lm3533) { }
+#endif /* CONFIG_DEBUG_FS */
+
+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;
+}
+
+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;
+ }
+
+ mutex_init(&lm3533->io_mutex);
+ 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;
+ }
+
+ lm3533_debugfs_init(lm3533);
+
+ 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;
+}
+
+void __devexit lm3533_device_exit(struct lm3533 *lm3533)
+{
+ dev_dbg(lm3533->dev, "%s\n", __func__);
+
+ lm3533_debugfs_cleanup(lm3533);
+
+ 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);
+}
+
+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..2feb4e8
--- /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 control:
+ *
+ * bit 5 - PWM enabled in Zone 4
+ * bit 4 - PWM enabled in Zone 3
+ * bit 3 - PWM enabled in Zone 2
+ * bit 2 - PWM enabled in Zone 1
+ * bit 1 - PWM enabled in Zone 0
+ * bit 0 - PWM 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/drivers/mfd/lm3533-i2c.c b/drivers/mfd/lm3533-i2c.c
new file mode 100644
index 0000000..d479b62
--- /dev/null
+++ b/drivers/mfd/lm3533-i2c.c
@@ -0,0 +1,115 @@
+/*
+ * lm3533-i2c.c -- LM3533 I2C 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/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+
+#include <linux/mfd/lm3533.h>
+
+
+static int lm3533_i2c_read(struct lm3533 *lm3533, u8 reg, u8 *val)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(lm3533->i2c, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = (u8)ret;
+
+ return 0;
+}
+
+static int lm3533_i2c_write(struct lm3533 *lm3533, u8 reg, u8 val)
+{
+ return i2c_smbus_write_byte_data(lm3533->i2c, reg, val);
+}
+
+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__);
+
+ if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -EINVAL;
+
+ lm3533 = kzalloc(sizeof(*lm3533), GFP_KERNEL);
+ if (!lm3533)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, lm3533);
+
+ lm3533->dev = &i2c->dev;
+ lm3533->i2c = i2c;
+ lm3533->irq = i2c->irq;
+ lm3533->read = lm3533_i2c_read;
+ lm3533->write = lm3533_i2c_write;
+
+ ret = lm3533_device_init(lm3533);
+ if (ret) {
+ kfree(lm3533);
+ return ret;
+ }
+
+ return 0;
+}
+
+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);
+
+ 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 I2C interface");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/lm3533.h b/include/linux/mfd/lm3533.h
new file mode 100644
index 0000000..cb8bf33
--- /dev/null
+++ b/include/linux/mfd/lm3533.h
@@ -0,0 +1,106 @@
+/*
+ * 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
+
+#include <linux/mutex.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 dentry;
+struct i2c_client;
+
+struct lm3533 {
+ struct device *dev;
+ struct i2c_client *i2c;
+
+ struct mutex io_mutex;
+
+ int (*read)(struct lm3533 *lm3533, u8 reg, u8 *val);
+ int (*write)(struct lm3533 *lm3533, u8 reg, u8 val);
+
+ int gpio_hwen;
+ int irq;
+
+ unsigned have_als:1;
+ unsigned have_backlights:1;
+ unsigned have_leds:1;
+
+#ifdef CONFIG_DEBUG_FS
+ struct dentry *debugfs_root;
+#endif
+};
+
+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) */
+ unsigned int_mode:1; /* interrupt mode (default polled) */
+ unsigned poll_interval; /* in polled mode (in ms) */
+};
+
+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);
+
+extern int __devinit lm3533_device_init(struct lm3533 *lm3533);
+extern void __devinit lm3533_device_exit(struct lm3533 *lm3533);
+
+#endif /* __LINUX_MFD_LM3533_H */
--
1.7.8.5


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