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mfd: Add subdevs in max8925
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Add subdevs in MAX8925. MAX8925 includes regulator, backlight and touch
components.

Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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Haojian Zhuang authored and Samuel Ortiz committed Mar 7, 2010
1 parent d50f8f3 commit 1ad9989
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Showing 3 changed files with 239 additions and 0 deletions.
1 change: 1 addition & 0 deletions drivers/mfd/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -197,6 +197,7 @@ config PMIC_ADP5520
config MFD_MAX8925
tristate "Maxim Semiconductor MAX8925 PMIC Support"
depends on I2C
select MFD_CORE
help
Say yes here to support for Maxim Semiconductor MAX8925. This is
a Power Management IC. This driver provies common support for
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142 changes: 142 additions & 0 deletions drivers/mfd/max8925-core.c
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,109 @@
#define IRQ_MODE_STATUS 0
#define IRQ_MODE_MASK 1

static struct resource backlight_resources[] = {
{
.name = "max8925-backlight",
.start = MAX8925_WLED_MODE_CNTL,
.end = MAX8925_WLED_CNTL,
.flags = IORESOURCE_IO,
},
};

static struct mfd_cell backlight_devs[] = {
{
.name = "max8925-backlight",
.num_resources = 1,
.resources = &backlight_resources[0],
.id = -1,
},
};

static struct resource touch_resources[] = {
{
.name = "max8925-tsc",
.start = MAX8925_TSC_IRQ,
.end = MAX8925_ADC_RES_END,
.flags = IORESOURCE_IO,
},
};

static struct mfd_cell touch_devs[] = {
{
.name = "max8925-touch",
.num_resources = 1,
.resources = &touch_resources[0],
.id = -1,
},
};

#define MAX8925_REG_RESOURCE(_start, _end) \
{ \
.start = MAX8925_##_start, \
.end = MAX8925_##_end, \
.flags = IORESOURCE_IO, \
}

static struct resource regulator_resources[] = {
MAX8925_REG_RESOURCE(SDCTL1, SDCTL1),
MAX8925_REG_RESOURCE(SDCTL2, SDCTL2),
MAX8925_REG_RESOURCE(SDCTL3, SDCTL3),
MAX8925_REG_RESOURCE(LDOCTL1, LDOCTL1),
MAX8925_REG_RESOURCE(LDOCTL2, LDOCTL2),
MAX8925_REG_RESOURCE(LDOCTL3, LDOCTL3),
MAX8925_REG_RESOURCE(LDOCTL4, LDOCTL4),
MAX8925_REG_RESOURCE(LDOCTL5, LDOCTL5),
MAX8925_REG_RESOURCE(LDOCTL6, LDOCTL6),
MAX8925_REG_RESOURCE(LDOCTL7, LDOCTL7),
MAX8925_REG_RESOURCE(LDOCTL8, LDOCTL8),
MAX8925_REG_RESOURCE(LDOCTL9, LDOCTL9),
MAX8925_REG_RESOURCE(LDOCTL10, LDOCTL10),
MAX8925_REG_RESOURCE(LDOCTL11, LDOCTL11),
MAX8925_REG_RESOURCE(LDOCTL12, LDOCTL12),
MAX8925_REG_RESOURCE(LDOCTL13, LDOCTL13),
MAX8925_REG_RESOURCE(LDOCTL14, LDOCTL14),
MAX8925_REG_RESOURCE(LDOCTL15, LDOCTL15),
MAX8925_REG_RESOURCE(LDOCTL16, LDOCTL16),
MAX8925_REG_RESOURCE(LDOCTL17, LDOCTL17),
MAX8925_REG_RESOURCE(LDOCTL18, LDOCTL18),
MAX8925_REG_RESOURCE(LDOCTL19, LDOCTL19),
MAX8925_REG_RESOURCE(LDOCTL20, LDOCTL20),
};

#define MAX8925_REG_DEVS(_id) \
{ \
.name = "max8925-regulator", \
.num_resources = 1, \
.resources = &regulator_resources[MAX8925_ID_##_id], \
.id = MAX8925_ID_##_id, \
}

static struct mfd_cell regulator_devs[] = {
MAX8925_REG_DEVS(SD1),
MAX8925_REG_DEVS(SD2),
MAX8925_REG_DEVS(SD3),
MAX8925_REG_DEVS(LDO1),
MAX8925_REG_DEVS(LDO2),
MAX8925_REG_DEVS(LDO3),
MAX8925_REG_DEVS(LDO4),
MAX8925_REG_DEVS(LDO5),
MAX8925_REG_DEVS(LDO6),
MAX8925_REG_DEVS(LDO7),
MAX8925_REG_DEVS(LDO8),
MAX8925_REG_DEVS(LDO9),
MAX8925_REG_DEVS(LDO10),
MAX8925_REG_DEVS(LDO11),
MAX8925_REG_DEVS(LDO12),
MAX8925_REG_DEVS(LDO13),
MAX8925_REG_DEVS(LDO14),
MAX8925_REG_DEVS(LDO15),
MAX8925_REG_DEVS(LDO16),
MAX8925_REG_DEVS(LDO17),
MAX8925_REG_DEVS(LDO18),
MAX8925_REG_DEVS(LDO19),
MAX8925_REG_DEVS(LDO20),
};

static int __get_irq_offset(struct max8925_chip *chip, int irq, int mode,
int *offset, int *bit)
{
Expand Down Expand Up @@ -210,6 +313,30 @@ static int __devinit device_gpm_init(struct max8925_chip *chip,

/* enable hard-reset for ONKEY power-off */
max8925_set_bits(i2c, MAX8925_SYSENSEL, 0x80, 0x80);

ret = mfd_add_devices(chip->dev, 0, &regulator_devs[0],
ARRAY_SIZE(regulator_devs),
&regulator_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add regulator subdev\n");
goto out_irq;
}

if (pdata && pdata->backlight) {
ret = mfd_add_devices(chip->dev, 0, &backlight_devs[0],
ARRAY_SIZE(backlight_devs),
&backlight_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add backlight subdev\n");
goto out_dev;
}
}
return 0;
out_dev:
mfd_remove_devices(chip->dev);
out_irq:
if (chip->chip_irq)
free_irq(chip->chip_irq, chip);
out:
return ret;
}
Expand All @@ -233,6 +360,20 @@ static int __devinit device_adc_init(struct max8925_chip *chip,
goto out;
}
chip->chip_irq = i2c->irq;

if (pdata && pdata->touch) {
ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
ARRAY_SIZE(touch_devs),
&touch_resources[0], 0);
if (ret < 0) {
dev_err(chip->dev, "Failed to add touch subdev\n");
goto out_irq;
}
}
return 0;
out_irq:
if (chip->chip_irq)
free_irq(chip->chip_irq, chip);
out:
return ret;
}
Expand All @@ -255,6 +396,7 @@ void max8925_device_exit(struct max8925_chip *chip)
{
if (chip->chip_irq >= 0)
free_irq(chip->chip_irq, chip);
mfd_remove_devices(chip->dev);
}

MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
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96 changes: 96 additions & 0 deletions include/linux/mfd/max8925.h
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,33 @@

#include <linux/interrupt.h>

/* Unified sub device IDs for MAX8925 */
enum {
MAX8925_ID_SD1,
MAX8925_ID_SD2,
MAX8925_ID_SD3,
MAX8925_ID_LDO1,
MAX8925_ID_LDO2,
MAX8925_ID_LDO3,
MAX8925_ID_LDO4,
MAX8925_ID_LDO5,
MAX8925_ID_LDO6,
MAX8925_ID_LDO7,
MAX8925_ID_LDO8,
MAX8925_ID_LDO9,
MAX8925_ID_LDO10,
MAX8925_ID_LDO11,
MAX8925_ID_LDO12,
MAX8925_ID_LDO13,
MAX8925_ID_LDO14,
MAX8925_ID_LDO15,
MAX8925_ID_LDO16,
MAX8925_ID_LDO17,
MAX8925_ID_LDO18,
MAX8925_ID_LDO19,
MAX8925_ID_LDO20,
};

/* Charger registers */
#define MAX8925_CHG_IRQ1 (0x7e)
#define MAX8925_CHG_IRQ2 (0x7f)
Expand All @@ -32,12 +59,65 @@
/* Touch registers */
#define MAX8925_TSC_IRQ (0x00)
#define MAX8925_TSC_IRQ_MASK (0x01)
#define MAX8925_ADC_RES_END (0x6f)

/* RTC registers */
#define MAX8925_RTC_STATUS (0x1a)
#define MAX8925_RTC_IRQ (0x1c)
#define MAX8925_RTC_IRQ_MASK (0x1d)

/* WLED registers */
#define MAX8925_WLED_MODE_CNTL (0x84)
#define MAX8925_WLED_CNTL (0x85)

/* MAX8925 Registers */
#define MAX8925_SDCTL1 (0x04)
#define MAX8925_SDCTL2 (0x07)
#define MAX8925_SDCTL3 (0x0A)
#define MAX8925_SDV1 (0x06)
#define MAX8925_SDV2 (0x09)
#define MAX8925_SDV3 (0x0C)
#define MAX8925_LDOCTL1 (0x18)
#define MAX8925_LDOCTL2 (0x1C)
#define MAX8925_LDOCTL3 (0x20)
#define MAX8925_LDOCTL4 (0x24)
#define MAX8925_LDOCTL5 (0x28)
#define MAX8925_LDOCTL6 (0x2C)
#define MAX8925_LDOCTL7 (0x30)
#define MAX8925_LDOCTL8 (0x34)
#define MAX8925_LDOCTL9 (0x38)
#define MAX8925_LDOCTL10 (0x3C)
#define MAX8925_LDOCTL11 (0x40)
#define MAX8925_LDOCTL12 (0x44)
#define MAX8925_LDOCTL13 (0x48)
#define MAX8925_LDOCTL14 (0x4C)
#define MAX8925_LDOCTL15 (0x50)
#define MAX8925_LDOCTL16 (0x10)
#define MAX8925_LDOCTL17 (0x14)
#define MAX8925_LDOCTL18 (0x72)
#define MAX8925_LDOCTL19 (0x5C)
#define MAX8925_LDOCTL20 (0x9C)
#define MAX8925_LDOVOUT1 (0x1A)
#define MAX8925_LDOVOUT2 (0x1E)
#define MAX8925_LDOVOUT3 (0x22)
#define MAX8925_LDOVOUT4 (0x26)
#define MAX8925_LDOVOUT5 (0x2A)
#define MAX8925_LDOVOUT6 (0x2E)
#define MAX8925_LDOVOUT7 (0x32)
#define MAX8925_LDOVOUT8 (0x36)
#define MAX8925_LDOVOUT9 (0x3A)
#define MAX8925_LDOVOUT10 (0x3E)
#define MAX8925_LDOVOUT11 (0x42)
#define MAX8925_LDOVOUT12 (0x46)
#define MAX8925_LDOVOUT13 (0x4A)
#define MAX8925_LDOVOUT14 (0x4E)
#define MAX8925_LDOVOUT15 (0x52)
#define MAX8925_LDOVOUT16 (0x12)
#define MAX8925_LDOVOUT17 (0x16)
#define MAX8925_LDOVOUT18 (0x74)
#define MAX8925_LDOVOUT19 (0x5E)
#define MAX8925_LDOVOUT20 (0x9E)

/* bit definitions */
#define CHG_IRQ1_MASK (0x07)
#define CHG_IRQ2_MASK (0xff)
Expand Down Expand Up @@ -83,6 +163,8 @@ enum {
#define MAX8925_IRQ_TSC_STICK (0)
#define MAX8925_IRQ_TSC_NSTICK (1)

#define MAX8925_MAX_REGULATOR (23)

struct max8925_irq {
irq_handler_t handler;
void *data;
Expand All @@ -100,7 +182,21 @@ struct max8925_chip {
int chip_irq;
};

struct max8925_backlight_pdata {
int lxw_scl; /* 0/1 -- 0.8Ohm/0.4Ohm */
int lxw_freq; /* 700KHz ~ 1400KHz */
int dual_string; /* 0/1 -- single/dual string */
};

struct max8925_touch_pdata {
unsigned int flags;
};

struct max8925_platform_data {
struct max8925_backlight_pdata *backlight;
struct max8925_touch_pdata *touch;
struct regulator_init_data *regulator[MAX8925_MAX_REGULATOR];

int chip_id;
int chip_irq;
};
Expand Down

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