[PATCH 1/6] mfd: add lp8788 mfd driver
From: Kim, Milo
Date: Wed Jul 18 2012 - 10:33:27 EST
TI LP8788 PMU supports regulators, battery charger, RTC, backlight driver and
current sinks.
Registers are controlled via the I2C with the regmap-i2c interface.
LP8788 irq domains are defined and used for handling interrupts.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@xxxxxx>
---
drivers/mfd/Kconfig | 10 +
drivers/mfd/Makefile | 2 +
drivers/mfd/lp8788-irq.c | 290 +++++++++++++++++++++++++++++
drivers/mfd/lp8788.c | 377 ++++++++++++++++++++++++++++++++++++++
include/linux/mfd/lp8788-isink.h | 52 ++++++
include/linux/mfd/lp8788.h | 367 +++++++++++++++++++++++++++++++++++++
6 files changed, 1098 insertions(+), 0 deletions(-)
create mode 100644 drivers/mfd/lp8788-irq.c
create mode 100644 drivers/mfd/lp8788.c
create mode 100644 include/linux/mfd/lp8788-isink.h
create mode 100644 include/linux/mfd/lp8788.h
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index b3c19ba..0d2b1a2 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -449,6 +449,16 @@ config PMIC_ADP5520
individual components like LCD backlight, LEDs, GPIOs and Kepad
under the corresponding menus.
+config MFD_LP8788
+ bool "Texas Instruments LP8788 Power Management Unit Driver"
+ depends on I2C=y
+ select MFD_CORE
+ select REGMAP_I2C
+ select IRQ_DOMAIN
+ help
+ TI LP8788 PMU supports regulators, battery charger, RTC,
+ backlight driver and current sinks.
+
config MFD_MAX77686
bool "Maxim Semiconductor MAX77686 PMIC Support"
depends on I2C=y && GENERIC_HARDIRQS
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 79dd22d..489cab9 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -90,6 +90,8 @@ obj-$(CONFIG_PMIC_DA9052) += da9052-core.o
obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
+obj-$(CONFIG_MFD_LP8788) += lp8788.o lp8788-irq.o
+
obj-$(CONFIG_MFD_MAX77686) += max77686.o max77686-irq.o
obj-$(CONFIG_MFD_MAX77693) += max77693.o max77693-irq.o
max8925-objs := max8925-core.o max8925-i2c.o
diff --git a/drivers/mfd/lp8788-irq.c b/drivers/mfd/lp8788-irq.c
new file mode 100644
index 0000000..de499bd
--- /dev/null
+++ b/drivers/mfd/lp8788-irq.c
@@ -0,0 +1,290 @@
+/*
+ * TI LP8788 MFD - interrupt handler
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/mfd/lp8788.h>
+
+/* register address */
+#define LP8788_INT_1 0x00
+#define LP8788_INTEN_1 0x03
+
+#define BASE_INTEN_REG LP8788_INTEN_1
+#define DEBOUNCE_MSEC 450
+#define SIZE_REG 8
+#define NUM_INTREGS 3
+
+/*
+ * struct lp8788_irq_data
+ * @lp : access to lp8788 registers
+ * @irqdm : interrupt domain for handling nested interrupt
+ * @irq_lock : mutex for enabling/disabling the interrupt
+ * @work : work for handling interrupt with debounce time
+ * @thread : work queue for handling interrupt
+ * @enabled : status of enabled interrupt
+ * @irq : pin number of IRQ_N pin
+ * @irq_base : used for handling chained interrupt
+ */
+struct lp8788_irq_data {
+ struct lp8788 *lp;
+ struct irq_domain *irqdm;
+ struct mutex irq_lock;
+ struct delayed_work work;
+ struct workqueue_struct *thread;
+ int enabled[LP8788_INT_MAX];
+ int irq;
+ int irq_base;
+};
+
+static inline u8 _irq_to_addr(enum lp8788_int_id id)
+{
+ return id / SIZE_REG;
+}
+
+static inline u8 _irq_to_enable_addr(enum lp8788_int_id id)
+{
+ return _irq_to_addr(id) + BASE_INTEN_REG;
+}
+
+static inline u8 _irq_to_mask(enum lp8788_int_id id)
+{
+ return 1 << (id % SIZE_REG);
+}
+
+static inline u8 _irq_to_val(enum lp8788_int_id id, int enable)
+{
+ return enable << (id % SIZE_REG);
+}
+
+static void lp8788_irq_enable(struct irq_data *data)
+{
+ struct lp8788_irq_data *irqd = irq_data_get_irq_chip_data(data);
+ enum lp8788_int_id irq = data->irq - irqd->irq_base;
+
+ irqd->enabled[irq] = 1;
+}
+
+static void lp8788_irq_disable(struct irq_data *data)
+{
+ struct lp8788_irq_data *irqd = irq_data_get_irq_chip_data(data);
+ enum lp8788_int_id irq = data->irq - irqd->irq_base;
+
+ irqd->enabled[irq] = 0;
+}
+
+static void lp8788_irq_bus_lock(struct irq_data *data)
+{
+ struct lp8788_irq_data *irqd = irq_data_get_irq_chip_data(data);
+
+ mutex_lock(&irqd->irq_lock);
+}
+
+static void lp8788_irq_bus_sync_unlock(struct irq_data *data)
+{
+ struct lp8788_irq_data *irqd = irq_data_get_irq_chip_data(data);
+ enum lp8788_int_id irq = data->irq - irqd->irq_base;
+ u8 addr, mask, val;
+
+ addr = _irq_to_enable_addr(irq);
+ mask = _irq_to_mask(irq);
+ val = _irq_to_val(irq, irqd->enabled[irq]);
+
+ lp8788_update_bits(irqd->lp, addr, mask, val);
+
+ mutex_unlock(&irqd->irq_lock);
+}
+
+static struct irq_chip lp8788_irq_chip = {
+ .name = "lp8788",
+ .irq_enable = lp8788_irq_enable,
+ .irq_disable = lp8788_irq_disable,
+ .irq_bus_lock = lp8788_irq_bus_lock,
+ .irq_bus_sync_unlock = lp8788_irq_bus_sync_unlock,
+};
+
+static int lp8788_irq_map(struct irq_domain *d, unsigned int virq,
+ irq_hw_number_t hwirq)
+{
+ struct lp8788_irq_data *irqd = d->host_data;
+ struct irq_chip *chip = &lp8788_irq_chip;
+
+ irq_set_chip_data(virq, irqd);
+ irq_set_chip_and_handler(virq, chip, handle_simple_irq);
+ irq_set_nested_thread(virq, 1);
+
+#ifdef CONFIG_ARM
+ set_irq_flags(virq, IRQF_VALID);
+#else
+ irq_set_noprobe(virq);
+#endif
+
+ return 0;
+}
+
+static struct irq_domain_ops lp8788_irqdm_ops = {
+ .map = lp8788_irq_map,
+};
+
+static void lp8788_nested_irq_handler(struct work_struct *work)
+{
+ struct lp8788_irq_data *irqd =
+ container_of(work, struct lp8788_irq_data, work.work);
+ struct lp8788 *lp = irqd->lp;
+ u8 status[NUM_INTREGS], addr, mask;
+ int i, ret, irq;
+
+ ret = lp8788_read_multi_bytes(lp, LP8788_INT_1, status, NUM_INTREGS);
+ if (ret)
+ return;
+
+ for (i = 0 ; i < LP8788_INT_MAX ; i++) {
+ addr = _irq_to_addr(i);
+ mask = _irq_to_mask(i);
+
+ /* only reporting the irq which is enabled */
+ if (status[addr] & mask) {
+ irq = irq_find_mapping(irqd->irqdm, i);
+ handle_nested_irq(irq);
+ dev_info(lp->dev, "IRQ: %d\n", irq);
+ }
+ }
+}
+
+static irqreturn_t lp8788_irq_handler(int irq, void *ptr)
+{
+ struct lp8788_irq_data *irqd = ptr;
+ unsigned long delay = msecs_to_jiffies(DEBOUNCE_MSEC);
+
+ queue_delayed_work(irqd->thread, &irqd->work, delay);
+
+ return IRQ_HANDLED;
+}
+
+static int lp8788_update_enable_irq_status(struct lp8788_irq_data *irqd)
+{
+ struct lp8788 *lp = irqd->lp;
+ u8 data[NUM_INTREGS], addr, mask;
+ int i, ret;
+
+ /* clear interrupts before setting irq data */
+ ret = lp8788_read_multi_bytes(lp, LP8788_INT_1, data, NUM_INTREGS);
+ if (ret)
+ return ret;
+
+ /* read irq enable bits and update enabled status */
+ ret = lp8788_read_multi_bytes(lp, LP8788_INTEN_1, data, NUM_INTREGS);
+ if (ret)
+ return ret;
+
+ for (i = 0 ; i < LP8788_INT_MAX ; i++) {
+ addr = _irq_to_addr(i);
+ mask = _irq_to_mask(i);
+ irqd->enabled[i] = data[addr] & mask ? 1 : 0;
+ }
+
+ return 0;
+}
+
+static int lp8788_create_irq_threads(struct lp8788_irq_data *irqd)
+{
+ struct device *dev = irqd->lp->dev;
+ int irq = irqd->irq;
+ int ret;
+
+ /* thread for IRQ_N pin */
+ ret = request_threaded_irq(irq, NULL, lp8788_irq_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "lp8788-irq", irqd);
+ if (ret) {
+ dev_err(dev, "failed to create a thread for IRQ_N\n");
+ goto err_irq;
+ }
+
+ INIT_DELAYED_WORK(&irqd->work, lp8788_nested_irq_handler);
+
+ /* thread for handling nested IRQs after debounce time */
+ irqd->thread = create_singlethread_workqueue("lp8788-nested-irq");
+ if (!irqd->thread) {
+ dev_err(dev, "failed to create a thread for nested irqs\n");
+ ret = -ENOMEM;
+ goto cleanup_irq_thread;
+ }
+
+ return 0;
+
+cleanup_irq_thread:
+ free_irq(irq, irqd);
+err_irq:
+ return ret;
+}
+
+int lp8788_irq_init(struct lp8788 *lp, int irq)
+{
+ struct device_node *of_node = lp->dev->of_node;
+ struct lp8788_irq_data *irqd;
+ int ret, irq_base;
+
+ if (!lp->pdata) {
+ dev_warn(lp->dev, "no platform data for irq\n");
+ goto no_err;
+ }
+
+ irqd = devm_kzalloc(lp->dev, sizeof(*irqd), GFP_KERNEL);
+ if (!irqd)
+ return -ENOMEM;
+
+ lp->irqd = irqd;
+ irqd->lp = lp;
+ irqd->irq = irq;
+
+ ret = lp8788_update_enable_irq_status(irqd);
+ if (ret)
+ return ret;
+
+ irq_base = lp->pdata->irq_base;
+ if (irq_base) {
+ irq_base = irq_alloc_descs(irq_base, 0, LP8788_INT_MAX, 0);
+ if (irq_base < 0) {
+ dev_warn(lp->dev, "no allocated irq: %d\n", irq_base);
+ goto no_err;
+ }
+ }
+ irqd->irq_base = irq_base;
+
+ mutex_init(&irqd->irq_lock);
+
+ irqd->irqdm = irq_domain_add_simple(of_node, LP8788_INT_MAX, irq_base,
+ &lp8788_irqdm_ops, irqd);
+ if (!irqd->irqdm) {
+ dev_err(lp->dev, "failed to add irq domain err\n");
+ return -EINVAL;
+ }
+
+ return lp8788_create_irq_threads(irqd);
+
+no_err:
+ return 0;
+}
+
+void lp8788_irq_exit(struct lp8788 *lp)
+{
+ struct lp8788_irq_data *irqd = lp->irqd;
+
+ free_irq(irqd->irq, irqd);
+ destroy_workqueue(irqd->thread);
+}
diff --git a/drivers/mfd/lp8788.c b/drivers/mfd/lp8788.c
new file mode 100644
index 0000000..977ae2e
--- /dev/null
+++ b/drivers/mfd/lp8788.c
@@ -0,0 +1,377 @@
+/*
+ * TI LP8788 MFD - core interface
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/lp8788.h>
+
+/* register address */
+#define LP8788_ADC_CONF 0x60
+#define LP8788_ADC_RAW 0x61
+#define LP8788_ADC_DONE 0x63
+
+#define ADC_CONV_START 1
+#define ADC_CONV_DELAY_US 100
+#define MAX_LP8788_REGISTERS 0xA2
+
+#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \
+{ \
+ .name = LP8788_DEV_##_name, \
+ .resources = _resource, \
+ .num_resources = num_resource, \
+}
+
+#define MFD_DEV_WITH_ID(_name, _id) \
+{ \
+ .name = LP8788_DEV_##_name, \
+ .id = _id, \
+}
+
+#define MFD_DEV_SIMPLE(_name) \
+{ \
+ .name = LP8788_DEV_##_name, \
+}
+
+static struct resource chg_irqs[] = {
+ /* Charger Interrupts */
+ {
+ .start = LP8788_INT_CHG_INPUT_STATE,
+ .end = LP8788_INT_PRECHG_TIMEOUT,
+ .name = LP8788_CHG_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+ /* Power Routing Switch Interrupts */
+ {
+ .start = LP8788_INT_ENTER_SYS_SUPPORT,
+ .end = LP8788_INT_EXIT_SYS_SUPPORT,
+ .name = LP8788_PRSW_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+ /* Battery Interrupts */
+ {
+ .start = LP8788_INT_BATT_LOW,
+ .end = LP8788_INT_NO_BATT,
+ .name = LP8788_BATT_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct resource rtc_irqs[] = {
+ {
+ .start = LP8788_INT_RTC_ALARM1,
+ .end = LP8788_INT_RTC_ALARM2,
+ .name = LP8788_ALM_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct mfd_cell lp8788_devs[] = {
+ /* 4 bucks */
+ MFD_DEV_WITH_ID(BUCK, 1),
+ MFD_DEV_WITH_ID(BUCK, 2),
+ MFD_DEV_WITH_ID(BUCK, 3),
+ MFD_DEV_WITH_ID(BUCK, 4),
+ /* 12 digital ldos */
+ MFD_DEV_WITH_ID(DLDO, 1),
+ MFD_DEV_WITH_ID(DLDO, 2),
+ MFD_DEV_WITH_ID(DLDO, 3),
+ MFD_DEV_WITH_ID(DLDO, 4),
+ MFD_DEV_WITH_ID(DLDO, 5),
+ MFD_DEV_WITH_ID(DLDO, 6),
+ MFD_DEV_WITH_ID(DLDO, 7),
+ MFD_DEV_WITH_ID(DLDO, 8),
+ MFD_DEV_WITH_ID(DLDO, 9),
+ MFD_DEV_WITH_ID(DLDO, 10),
+ MFD_DEV_WITH_ID(DLDO, 11),
+ MFD_DEV_WITH_ID(DLDO, 12),
+ /* 10 analog ldos */
+ MFD_DEV_WITH_ID(ALDO, 1),
+ MFD_DEV_WITH_ID(ALDO, 2),
+ MFD_DEV_WITH_ID(ALDO, 3),
+ MFD_DEV_WITH_ID(ALDO, 4),
+ MFD_DEV_WITH_ID(ALDO, 5),
+ MFD_DEV_WITH_ID(ALDO, 6),
+ MFD_DEV_WITH_ID(ALDO, 7),
+ MFD_DEV_WITH_ID(ALDO, 8),
+ MFD_DEV_WITH_ID(ALDO, 9),
+ MFD_DEV_WITH_ID(ALDO, 10),
+ /* battery charger */
+ MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),
+ /* rtc */
+ MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),
+ /* backlight */
+ MFD_DEV_SIMPLE(BACKLIGHT),
+ /* current sink for vibrator */
+ MFD_DEV_SIMPLE(VIBRATOR),
+ /* current sink for keypad LED */
+ MFD_DEV_SIMPLE(KEYLED),
+};
+
+/*
+ ADC constant values for each selection
+
+[8 bit resolution]
+ - VIN_CHG : adc max value x 1000000 / (255 x 0.48)
+ - OTHERS : adc max value x 1000000 / 255
+
+[12 bit resolution]
+ - VIN_CHG : adc max value x 1000000 / (4095 x 0.48)
+ - OTHERS : adc max value x 1000000 / 4095
+
+*/
+static const int adc_const_8b[LPADC_MAX] = {
+ [LPADC_VBATT_5P5] = 21568,
+ [LPADC_VIN_CHG] = 49019,
+ [LPADC_IBATT] = 9803,
+ [LPADC_IC_TEMP] = 9803,
+ [LPADC_VBATT_6P0] = 23529,
+ [LPADC_VBATT_5P0] = 19607,
+ [LPADC_ADC1] = 9803,
+ [LPADC_ADC2] = 9803,
+ [LPADC_VDD] = 16470,
+ [LPADC_VCOIN] = 12156,
+ [LPADC_VDD_LDO] = 9803,
+ [LPADC_ADC3] = 9803,
+ [LPADC_ADC4] = 9803,
+};
+
+static const int adc_const_12b[LPADC_MAX] = {
+ [LPADC_VBATT_5P5] = 1343,
+ [LPADC_VIN_CHG] = 3052,
+ [LPADC_IBATT] = 610,
+ [LPADC_IC_TEMP] = 610,
+ [LPADC_VBATT_6P0] = 1465,
+ [LPADC_VBATT_5P0] = 1221,
+ [LPADC_ADC1] = 610,
+ [LPADC_ADC2] = 610,
+ [LPADC_VDD] = 1025,
+ [LPADC_VCOIN] = 757,
+ [LPADC_VDD_LDO] = 610,
+ [LPADC_ADC3] = 610,
+ [LPADC_ADC4] = 610,
+};
+
+static inline unsigned int _get_adc_micro_unit(unsigned int adc_const,
+ unsigned int adc_result)
+{
+ return adc_const * ((adc_result * 1000 + 500) / 1000);
+}
+
+int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)
+{
+ int ret;
+ unsigned int val;
+
+ ret = regmap_read(lp->regmap, reg, &val);
+ if (ret < 0) {
+ dev_err(lp->dev, "failed to read 0x%.2x\n", reg);
+ return ret;
+ }
+
+ *data = (u8)val;
+ return 0;
+}
+EXPORT_SYMBOL(lp8788_read_byte);
+
+int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)
+{
+ return regmap_bulk_read(lp->regmap, reg, data, count);
+}
+EXPORT_SYMBOL(lp8788_read_multi_bytes);
+
+int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)
+{
+ return regmap_write(lp->regmap, reg, data);
+}
+EXPORT_SYMBOL(lp8788_write_byte);
+
+int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)
+{
+ return regmap_update_bits(lp->regmap, reg, mask, data);
+}
+EXPORT_SYMBOL(lp8788_update_bits);
+
+unsigned int lp8788_get_adc(struct lp8788 *lp, enum lp8788_adc_id id,
+ enum lp8788_adc_resolution res)
+{
+ unsigned int adc_const, adc_result;
+ int retry = 5;
+ u8 val;
+
+ if (res > LP8788_ADC_12BIT_RES) {
+ dev_warn(lp->dev, "invalid ADC resolution: %d\n", res);
+ res = LP8788_ADC_8BIT_RES;
+ }
+
+ val = (id << 1) | ADC_CONV_START;
+ if (lp8788_write_byte(lp, LP8788_ADC_CONF, val))
+ goto err;
+
+ /* retry until adc conversion is done */
+ val = 0;
+ while (retry--) {
+ udelay(ADC_CONV_DELAY_US);
+
+ if (lp8788_read_byte(lp, LP8788_ADC_DONE, &val))
+ goto err;
+
+ /* conversion done */
+ if (val)
+ break;
+ }
+
+ if (res == LP8788_ADC_8BIT_RES) {
+ u8 adc;
+
+ if (lp8788_read_byte(lp, LP8788_ADC_RAW, &adc))
+ goto err;
+
+ adc_result = adc & 0x0000ff;
+ adc_const = adc_const_8b[id];
+ } else {
+ u8 adc[2];
+ unsigned int msb, lsb;
+ int size = ARRAY_SIZE(adc);
+
+ if (lp8788_read_multi_bytes(lp, LP8788_ADC_RAW, adc, size))
+ goto err;
+
+ msb = (adc[0] << 4) & 0x00000ff0;
+ lsb = (adc[1] >> 4) & 0x0000000f;
+ adc_result = msb | lsb;
+ adc_const = adc_const_12b[id];
+ }
+
+ return _get_adc_micro_unit(adc_const, adc_result);
+err:
+ return 0;
+}
+EXPORT_SYMBOL(lp8788_get_adc);
+
+static int lp8788_platform_init(struct lp8788 *lp)
+{
+ struct lp8788_platform_data *pdata = lp->pdata;
+
+ return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;
+}
+
+static int lp8788_add_devices(struct lp8788 *lp)
+{
+ int ret;
+ int irq_base = lp->pdata ? lp->pdata->irq_base : 0;
+
+ ret = mfd_add_devices(lp->dev, -1, lp8788_devs, ARRAY_SIZE(lp8788_devs),
+ NULL, irq_base);
+ if (ret)
+ dev_err(lp->dev, "failed to add mfd device: %d\n", ret);
+
+ return ret;
+}
+
+static const struct regmap_config lp8788_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = MAX_LP8788_REGISTERS,
+};
+
+static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
+{
+ struct lp8788 *lp;
+ struct lp8788_platform_data *pdata = cl->dev.platform_data;
+ int ret;
+
+ if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
+ return -EIO;
+
+ if (!pdata)
+ dev_warn(&cl->dev, "no lp8788 platform data\n");
+
+ lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);
+ if (!lp)
+ return -ENOMEM;
+
+ lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);
+ if (IS_ERR(lp->regmap)) {
+ ret = PTR_ERR(lp->regmap);
+ dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);
+ goto err_out;
+ }
+
+ lp->pdata = pdata;
+ lp->dev = &cl->dev;
+ i2c_set_clientdata(cl, lp);
+
+ ret = lp8788_platform_init(lp);
+ if (ret)
+ goto err_out;
+
+ ret = lp8788_irq_init(lp, cl->irq);
+ if (ret)
+ goto err_out;
+
+ ret = lp8788_add_devices(lp);
+ if (ret)
+ goto err_irq;
+
+ return 0;
+
+err_irq:
+ lp8788_irq_exit(lp);
+err_out:
+ return ret;
+}
+
+static int __devexit lp8788_remove(struct i2c_client *cl)
+{
+ struct lp8788 *lp = i2c_get_clientdata(cl);
+
+ mfd_remove_devices(lp->dev);
+ lp8788_irq_exit(lp);
+ return 0;
+}
+
+static const struct i2c_device_id lp8788_ids[] = {
+ {"lp8788", 0},
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, lp8788_ids);
+
+static struct i2c_driver lp8788_driver = {
+ .driver = {
+ .name = "lp8788",
+ .owner = THIS_MODULE,
+ },
+ .probe = lp8788_probe,
+ .remove = __devexit_p(lp8788_remove),
+ .id_table = lp8788_ids,
+};
+
+static int __init lp8788_init(void)
+{
+ return i2c_add_driver(&lp8788_driver);
+}
+subsys_initcall(lp8788_init);
+
+static void __exit lp8788_exit(void)
+{
+ i2c_del_driver(&lp8788_driver);
+}
+module_exit(lp8788_exit);
+
+MODULE_DESCRIPTION("TI LP8788 MFD Driver");
+MODULE_AUTHOR("Milo Kim");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/lp8788-isink.h b/include/linux/mfd/lp8788-isink.h
new file mode 100644
index 0000000..f38262d
--- /dev/null
+++ b/include/linux/mfd/lp8788-isink.h
@@ -0,0 +1,52 @@
+/*
+ * TI LP8788 MFD - common definitions for current sinks
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __ISINK_LP8788_H__
+#define __ISINK_LP8788_H__
+
+/* register address */
+#define LP8788_ISINK_CTRL 0x99
+#define LP8788_ISINK12_IOUT 0x9A
+#define LP8788_ISINK3_IOUT 0x9B
+#define LP8788_ISINK1_PWM 0x9C
+#define LP8788_ISINK2_PWM 0x9D
+#define LP8788_ISINK3_PWM 0x9E
+
+/* mask bits */
+#define LP8788_ISINK1_IOUT_M 0x0F /* Addr 9Ah */
+#define LP8788_ISINK2_IOUT_M 0xF0
+#define LP8788_ISINK3_IOUT_M 0x0F /* Addr 9Bh */
+
+/* 6 bits used for PWM code : Addr 9C ~ 9Eh */
+#define LP8788_ISINK_MAX_PWM 63
+#define LP8788_ISINK_SCALE_OFFSET 3
+
+static const u8 lp8788_iout_addr[] = {
+ LP8788_ISINK12_IOUT,
+ LP8788_ISINK12_IOUT,
+ LP8788_ISINK3_IOUT,
+};
+
+static const u8 lp8788_iout_mask[] = {
+ LP8788_ISINK1_IOUT_M,
+ LP8788_ISINK2_IOUT_M,
+ LP8788_ISINK3_IOUT_M,
+};
+
+static const u8 lp8788_pwm_addr[] = {
+ LP8788_ISINK1_PWM,
+ LP8788_ISINK2_PWM,
+ LP8788_ISINK3_PWM,
+};
+
+#endif
diff --git a/include/linux/mfd/lp8788.h b/include/linux/mfd/lp8788.h
new file mode 100644
index 0000000..c8b7070
--- /dev/null
+++ b/include/linux/mfd/lp8788.h
@@ -0,0 +1,367 @@
+/*
+ * TI LP8788 MFD Device
+ *
+ * Copyright 2012 Texas Instruments
+ *
+ * Author: Milo(Woogyom) Kim <milo.kim@xxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __MFD_LP8788_H__
+#define __MFD_LP8788_H__
+
+#include <linux/regmap.h>
+#include <linux/gpio.h>
+
+#define LP8788_DEV_BUCK "lp8788-buck"
+#define LP8788_DEV_DLDO "lp8788-dldo"
+#define LP8788_DEV_ALDO "lp8788-aldo"
+#define LP8788_DEV_CHARGER "lp8788-charger"
+#define LP8788_DEV_RTC "lp8788-rtc"
+#define LP8788_DEV_BACKLIGHT "lp8788-backlight"
+#define LP8788_DEV_VIBRATOR "lp8788-vibrator"
+#define LP8788_DEV_KEYLED "lp8788-keyled"
+
+#define LP8788_NUM_BUCKS 4
+#define LP8788_NUM_DLDOS 12
+#define LP8788_NUM_ALDOS 10
+#define LP8788_NUM_BUCK2_DVS 2
+
+#define LP8788_CHG_IRQ "CHG_IRQ"
+#define LP8788_PRSW_IRQ "PRSW_IRQ"
+#define LP8788_BATT_IRQ "BATT_IRQ"
+#define LP8788_ALM_IRQ "ALARM_IRQ"
+
+enum lp8788_int_id {
+ /* interrup register 1 : Addr 00h */
+ LP8788_INT_TSDL,
+ LP8788_INT_TSDH,
+ LP8788_INT_UVLO,
+ LP8788_INT_FLAGMON,
+ LP8788_INT_PWRON_TIME,
+ LP8788_INT_PWRON,
+ LP8788_INT_COMP1,
+ LP8788_INT_COMP2,
+
+ /* interrupt register 2 : Addr 01h */
+ LP8788_INT_CHG_INPUT_STATE,
+ LP8788_INT_CHG_STATE,
+ LP8788_INT_EOC,
+ LP8788_INT_CHG_RESTART,
+ LP8788_INT_RESTART_TIMEOUT,
+ LP8788_INT_FULLCHG_TIMEOUT,
+ LP8788_INT_PRECHG_TIMEOUT,
+
+ /* interrupt register 3 : Addr 02h */
+ LP8788_INT_RTC_ALARM1 = 17,
+ LP8788_INT_RTC_ALARM2,
+ LP8788_INT_ENTER_SYS_SUPPORT,
+ LP8788_INT_EXIT_SYS_SUPPORT,
+ LP8788_INT_BATT_LOW,
+ LP8788_INT_NO_BATT,
+
+ LP8788_INT_MAX = 24,
+};
+
+enum lp8788_dvs_sel {
+ DVS_SEL_V0,
+ DVS_SEL_V1,
+ DVS_SEL_V2,
+ DVS_SEL_V3,
+};
+
+enum lp8788_ext_ldo_en_id {
+ EN_ALDO1,
+ EN_ALDO234,
+ EN_ALDO5,
+ EN_ALDO7,
+ EN_DLDO7,
+ EN_DLDO911,
+ EN_LDOS_MAX,
+};
+
+enum lp8788_charger_event {
+ NO_CHARGER,
+ CHARGER_DETECTED,
+};
+
+enum lp8788_bl_ctrl_mode {
+ LP8788_BL_REGISTER_ONLY,
+ LP8788_BL_COMB_PWM_BASED, /* PWM + I2C, changed by PWM input */
+ LP8788_BL_COMB_REGISTER_BASED, /* PWM + I2C, changed by I2C */
+};
+
+enum lp8788_bl_dim_mode {
+ LP8788_DIM_EXPONENTIAL,
+ LP8788_DIM_LINEAR,
+};
+
+enum lp8788_bl_full_scale_current {
+ LP8788_FULLSCALE_5000uA,
+ LP8788_FULLSCALE_8500uA,
+ LP8788_FULLSCALE_1200uA,
+ LP8788_FULLSCALE_1550uA,
+ LP8788_FULLSCALE_1900uA,
+ LP8788_FULLSCALE_2250uA,
+ LP8788_FULLSCALE_2600uA,
+ LP8788_FULLSCALE_2950uA,
+};
+
+enum lp8788_bl_ramp_step {
+ LP8788_RAMP_8us,
+ LP8788_RAMP_1024us,
+ LP8788_RAMP_2048us,
+ LP8788_RAMP_4096us,
+ LP8788_RAMP_8192us,
+ LP8788_RAMP_16384us,
+ LP8788_RAMP_32768us,
+ LP8788_RAMP_65538us,
+};
+
+enum lp8788_bl_pwm_polarity {
+ LP8788_PWM_ACTIVE_HIGH,
+ LP8788_PWM_ACTIVE_LOW,
+};
+
+enum lp8788_isink_scale {
+ LP8788_ISINK_SCALE_100mA,
+ LP8788_ISINK_SCALE_120mA,
+};
+
+enum lp8788_isink_number {
+ LP8788_ISINK_1,
+ LP8788_ISINK_2,
+ LP8788_ISINK_3,
+};
+
+enum lp8788_alarm_sel {
+ LP8788_ALARM_1,
+ LP8788_ALARM_2,
+ LP8788_ALARM_MAX,
+};
+
+enum lp8788_adc_resolution {
+ LP8788_ADC_8BIT_RES,
+ LP8788_ADC_12BIT_RES,
+};
+
+enum lp8788_adc_id {
+ LPADC_VBATT_5P5,
+ LPADC_VIN_CHG,
+ LPADC_IBATT,
+ LPADC_IC_TEMP,
+ LPADC_VBATT_6P0,
+ LPADC_VBATT_5P0,
+ LPADC_ADC1,
+ LPADC_ADC2,
+ LPADC_VDD,
+ LPADC_VCOIN,
+ LPADC_VDD_LDO,
+ LPADC_ADC3,
+ LPADC_ADC4,
+ LPADC_MAX,
+};
+
+struct lp8788;
+struct lp8788_irq_data;
+
+/*
+ * lp8788_buck1_dvs
+ * @gpio : gpio pin number for dvs control
+ * @vsel : dvs selector for buck v1 register
+ */
+struct lp8788_buck1_dvs {
+ int gpio;
+ enum lp8788_dvs_sel vsel;
+};
+
+/*
+ * lp8788_buck2_dvs
+ * @gpio : two gpio pin numbers are used for dvs
+ * @vsel : dvs selector for buck v2 register
+ */
+struct lp8788_buck2_dvs {
+ int gpio[LP8788_NUM_BUCK2_DVS];
+ enum lp8788_dvs_sel vsel;
+};
+
+/*
+ * struct lp8788_ldo_enable_pin
+ *
+ * Basically, all LDOs are enabled through the I2C commands.
+ * But ALDO 1 ~ 5, 7, DLDO 7, 9, 11 can be enabled by external gpio pins.
+ *
+ * @gpio : gpio number which is used for enabling ldos
+ * @init_state : initial gpio state (ex. GPIOF_OUT_INIT_LOW)
+ */
+struct lp8788_ldo_enable_pin {
+ int gpio;
+ int init_state;
+};
+
+/*
+ * struct lp8788_chg_param
+ * @addr : charging control register address (range : 0x11 ~ 0x1C)
+ * @val : charging parameter value
+ */
+struct lp8788_chg_param {
+ u8 addr;
+ u8 val;
+};
+
+/*
+ * struct lp8788_charger_platform_data
+ * @vbatt_adc : adc selection id for battery voltage
+ * @batt_temp_adc : adc selection id for battery temperature
+ * @max_vbatt_mv : used for calculating battery capacity
+ * @chg_params : initial charging parameters
+ * @num_chg_params : numbers of charging parameters
+ * @charger_event : the charger event can be reported to the platform side
+ */
+struct lp8788_charger_platform_data {
+ enum lp8788_adc_id vbatt_adc;
+ enum lp8788_adc_id batt_temp_adc;
+ unsigned int max_vbatt_mv;
+ struct lp8788_chg_param *chg_params;
+ int num_chg_params;
+ void (*charger_event) (struct lp8788 *lp,
+ enum lp8788_charger_event event);
+};
+
+/*
+ * struct lp8788_bl_pwm_data
+ * @pwm_set_intensity : set duty of pwm
+ * @pwm_get_intensity : get current duty of pwm
+ */
+struct lp8788_bl_pwm_data {
+ void (*pwm_set_intensity) (int brightness, int max_brightness);
+ int (*pwm_get_intensity) (int max_brightness);
+};
+
+/*
+ * struct lp8788_backlight_platform_data
+ * @name : backlight driver name. (default: "lcd-backlight")
+ * @initial_brightness : initial value of backlight brightness
+ * @bl_mode : brightness control by pwm or lp8788 register
+ * @dim_mode : dimming mode selection
+ * @full_scale : full scale current setting
+ * @rise_time : brightness ramp up step time
+ * @fall_time : brightness ramp down step time
+ * @pwm_pol : pwm polarity setting when bl_mode is pwm based
+ * @pwm_data : platform specific pwm generation functions
+ * only valid when bl_mode is pwm based
+ */
+struct lp8788_backlight_platform_data {
+ char *name;
+ int initial_brightness;
+ enum lp8788_bl_ctrl_mode bl_mode;
+ enum lp8788_bl_dim_mode dim_mode;
+ enum lp8788_bl_full_scale_current full_scale;
+ enum lp8788_bl_ramp_step rise_time;
+ enum lp8788_bl_ramp_step fall_time;
+ enum lp8788_bl_pwm_polarity pwm_pol;
+ struct lp8788_bl_pwm_data pwm_data;
+};
+
+/*
+ * struct lp8788_led_platform_data
+ * @name : led driver name. (default: "keyboard-backlight")
+ * @scale : current scale
+ * @num : current sink number
+ * @iout_code : current output value (Addr 9Ah ~ 9Bh)
+ */
+struct lp8788_led_platform_data {
+ char *name;
+ enum lp8788_isink_scale scale;
+ enum lp8788_isink_number num;
+ int iout_code;
+};
+
+/*
+ * struct lp8788_vib_platform_data
+ * @name : vibrator driver name
+ * @scale : current scale
+ * @num : current sink number
+ * @iout_code : current output value (Addr 9Ah ~ 9Bh)
+ * @pwm_code : PWM code value (Addr 9Ch ~ 9Eh)
+ */
+struct lp8788_vib_platform_data {
+ char *name;
+ enum lp8788_isink_scale scale;
+ enum lp8788_isink_number num;
+ int iout_code;
+ int pwm_code;
+};
+
+/*
+ * struct lp8788_platform_data
+ * @irq_base : used in chained interrupt handling
+ * @init_func : used for initializing registers
+ * before mfd driver is registered
+ * @buck_data : regulator initial data for buck
+ * @dldo_data : regulator initial data for digital ldo
+ * @aldo_data : regulator initial data for analog ldo
+ * @buck1_dvs : gpio configurations for buck1 dvs
+ * @buck2_dvs : gpio configurations for buck2 dvs
+ * @ldo_pin : gpio configurations for enabling LDOs
+ * @chg_pdata : platform data for charger driver
+ * @alarm_sel : rtc alarm selection (1 or 2)
+ * @bl_pdata : configurable data for backlight driver
+ * @led_pdata : configurable data for led driver
+ * @vib_pdata : configurable data for vibrator driver
+ */
+struct lp8788_platform_data {
+ /* general system information */
+ int irq_base;
+ int (*init_func) (struct lp8788 *lp);
+
+ /* regulators */
+ struct regulator_init_data *buck_data[LP8788_NUM_BUCKS];
+ struct regulator_init_data *dldo_data[LP8788_NUM_DLDOS];
+ struct regulator_init_data *aldo_data[LP8788_NUM_ALDOS];
+ struct lp8788_buck1_dvs *buck1_dvs;
+ struct lp8788_buck2_dvs *buck2_dvs;
+ struct lp8788_ldo_enable_pin *ldo_pin[EN_LDOS_MAX];
+
+ /* charger */
+ struct lp8788_charger_platform_data *chg_pdata;
+
+ /* rtc alarm */
+ enum lp8788_alarm_sel alarm_sel;
+
+ /* backlight */
+ struct lp8788_backlight_platform_data *bl_pdata;
+
+ /* current sinks */
+ struct lp8788_led_platform_data *led_pdata;
+ struct lp8788_vib_platform_data *vib_pdata;
+};
+
+/*
+ * struct lp8788
+ * @regmap : used for i2c communcation on accessing registers
+ * @irqd : used for handling interrupts
+ * @dev : parent device pointer
+ * @pdata : lp8788 platform specific data
+ */
+struct lp8788 {
+ struct regmap *regmap;
+ struct lp8788_irq_data *irqd;
+ struct device *dev;
+ struct lp8788_platform_data *pdata;
+};
+
+int lp8788_irq_init(struct lp8788 *lp, int chip_irq);
+void lp8788_irq_exit(struct lp8788 *lp);
+int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data);
+int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count);
+int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data);
+int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data);
+unsigned int lp8788_get_adc(struct lp8788 *lp, enum lp8788_adc_id id,
+ enum lp8788_adc_resolution res);
+
+#endif
--
1.7.2.5
Best Regards,
Milo
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