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mfd: Add basic tps6586x interrupt support 

Add support for enabling and disabling tps6586x subdevice interrupts

Signed-off-by: Gary King <gking@nvidia.com>
Acked-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Gary King 2010-09-20 00:18:27 +02:00 committed by Samuel Ortiz
parent 39368eda96
commit c26448c484
3 changed files with 233 additions and 2 deletions
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4
drivers/mfd/Kconfig
View File

@ -563,8 +563,8 @@ config MFD_JZ4740_ADC
This driver is necessary for jz4740-battery and jz4740-hwmon driver.
config MFD_TPS6586X
tristate "TPS6586x Power Management chips"
depends on I2C && GPIOLIB
bool "TPS6586x Power Management chips"
depends on I2C=y && GPIOLIB && GENERIC_HARDIRQS
select MFD_CORE
help
If you say yes here you get support for the TPS6586X series of

200
drivers/mfd/tps6586x.c
View File

@ -15,6 +15,8 @@
* published by the Free Software Foundation.
*/
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
@ -29,16 +31,76 @@
#define TPS6586X_GPIOSET1 0x5d
#define TPS6586X_GPIOSET2 0x5e
/* interrupt control registers */
#define TPS6586X_INT_ACK1 0xb5
#define TPS6586X_INT_ACK2 0xb6
#define TPS6586X_INT_ACK3 0xb7
#define TPS6586X_INT_ACK4 0xb8
/* interrupt mask registers */
#define TPS6586X_INT_MASK1 0xb0
#define TPS6586X_INT_MASK2 0xb1
#define TPS6586X_INT_MASK3 0xb2
#define TPS6586X_INT_MASK4 0xb3
#define TPS6586X_INT_MASK5 0xb4
/* device id */
#define TPS6586X_VERSIONCRC 0xcd
#define TPS658621A_VERSIONCRC 0x15
struct tps6586x_irq_data {
u8 mask_reg;
u8 mask_mask;
};
#define TPS6586X_IRQ(_reg, _mask) \
{ \
.mask_reg = (_reg) - TPS6586X_INT_MASK1, \
.mask_mask = (_mask), \
}
static const struct tps6586x_irq_data tps6586x_irqs[] = {
[TPS6586X_INT_PLDO_0] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
[TPS6586X_INT_PLDO_1] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
[TPS6586X_INT_PLDO_2] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
[TPS6586X_INT_PLDO_3] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
[TPS6586X_INT_PLDO_4] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
[TPS6586X_INT_PLDO_5] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
[TPS6586X_INT_PLDO_6] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
[TPS6586X_INT_PLDO_7] = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
[TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
[TPS6586X_INT_ADC] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
[TPS6586X_INT_PLDO_8] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
[TPS6586X_INT_PLDO_9] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
[TPS6586X_INT_PSM_0] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
[TPS6586X_INT_PSM_1] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
[TPS6586X_INT_PSM_2] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
[TPS6586X_INT_PSM_3] = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
[TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
[TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
[TPS6586X_INT_USB_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
[TPS6586X_INT_AC_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
[TPS6586X_INT_BAT_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
[TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
[TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
[TPS6586X_INT_PP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
[TPS6586X_INT_RESUME] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
[TPS6586X_INT_LOW_SYS] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
[TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
};
struct tps6586x {
struct mutex lock;
struct device *dev;
struct i2c_client *client;
struct gpio_chip gpio;
struct irq_chip irq_chip;
struct mutex irq_lock;
int irq_base;
u32 irq_en;
u8 mask_cache[5];
u8 mask_reg[5];
};
static inline int __tps6586x_read(struct i2c_client *client,
@ -262,6 +324,129 @@ static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
}
static void tps6586x_irq_lock(unsigned int irq)
{
struct tps6586x *tps6586x = get_irq_chip_data(irq);
mutex_lock(&tps6586x->irq_lock);
}
static void tps6586x_irq_enable(unsigned int irq)
{
struct tps6586x *tps6586x = get_irq_chip_data(irq);
unsigned int __irq = irq - tps6586x->irq_base;
const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
tps6586x->irq_en |= (1 << __irq);
}
static void tps6586x_irq_disable(unsigned int irq)
{
struct tps6586x *tps6586x = get_irq_chip_data(irq);
unsigned int __irq = irq - tps6586x->irq_base;
const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
tps6586x->irq_en &= ~(1 << __irq);
}
static void tps6586x_irq_sync_unlock(unsigned int irq)
{
struct tps6586x *tps6586x = get_irq_chip_data(irq);
int i;
for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
if (!WARN_ON(tps6586x_write(tps6586x->dev,
TPS6586X_INT_MASK1 + i,
tps6586x->mask_reg[i])))
tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
}
}
mutex_unlock(&tps6586x->irq_lock);
}
static irqreturn_t tps6586x_irq(int irq, void *data)
{
struct tps6586x *tps6586x = data;
u32 acks;
int ret = 0;
ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
sizeof(acks), (uint8_t *)&acks);
if (ret < 0) {
dev_err(tps6586x->dev, "failed to read interrupt status\n");
return IRQ_NONE;
}
acks = le32_to_cpu(acks);
while (acks) {
int i = __ffs(acks);
if (tps6586x->irq_en & (1 << i))
handle_nested_irq(tps6586x->irq_base + i);
acks &= ~(1 << i);
}
return IRQ_HANDLED;
}
static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
int irq_base)
{
int i, ret;
u8 tmp[4];
if (!irq_base) {
dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
return -EINVAL;
}
mutex_init(&tps6586x->irq_lock);
for (i = 0; i < 5; i++) {
tps6586x->mask_cache[i] = 0xff;
tps6586x->mask_reg[i] = 0xff;
tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
}
tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
tps6586x->irq_base = irq_base;
tps6586x->irq_chip.name = "tps6586x";
tps6586x->irq_chip.enable = tps6586x_irq_enable;
tps6586x->irq_chip.disable = tps6586x_irq_disable;
tps6586x->irq_chip.bus_lock = tps6586x_irq_lock;
tps6586x->irq_chip.bus_sync_unlock = tps6586x_irq_sync_unlock;
for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
int __irq = i + tps6586x->irq_base;
set_irq_chip_data(__irq, tps6586x);
set_irq_chip_and_handler(__irq, &tps6586x->irq_chip,
handle_simple_irq);
set_irq_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
set_irq_flags(__irq, IRQF_VALID);
#endif
}
ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
"tps6586x", tps6586x);
if (!ret) {
device_init_wakeup(tps6586x->dev, 1);
enable_irq_wake(irq);
}
return ret;
}
static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
struct tps6586x_platform_data *pdata)
{
@ -327,6 +512,15 @@ static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
mutex_init(&tps6586x->lock);
if (client->irq) {
ret = tps6586x_irq_init(tps6586x, client->irq,
pdata->irq_base);
if (ret) {
dev_err(&client->dev, "IRQ init failed: %d\n", ret);
goto err_irq_init;
}
}
ret = tps6586x_add_subdevs(tps6586x, pdata);
if (ret) {
dev_err(&client->dev, "add devices failed: %d\n", ret);
@ -338,6 +532,9 @@ static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
return 0;
err_add_devs:
if (client->irq)
free_irq(client->irq, tps6586x);
err_irq_init:
kfree(tps6586x);
return ret;
}
@ -348,6 +545,9 @@ static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
struct tps6586x_platform_data *pdata = client->dev.platform_data;
int ret;
if (client->irq)
free_irq(client->irq, tps6586x);
if (pdata->gpio_base) {
ret = gpiochip_remove(&tps6586x->gpio);
if (ret)

31
include/linux/mfd/tps6586x.h
View File

@ -18,6 +18,36 @@ enum {
TPS6586X_ID_LDO_RTC,
};
enum {
TPS6586X_INT_PLDO_0,
TPS6586X_INT_PLDO_1,
TPS6586X_INT_PLDO_2,
TPS6586X_INT_PLDO_3,
TPS6586X_INT_PLDO_4,
TPS6586X_INT_PLDO_5,
TPS6586X_INT_PLDO_6,
TPS6586X_INT_PLDO_7,
TPS6586X_INT_COMP_DET,
TPS6586X_INT_ADC,
TPS6586X_INT_PLDO_8,
TPS6586X_INT_PLDO_9,
TPS6586X_INT_PSM_0,
TPS6586X_INT_PSM_1,
TPS6586X_INT_PSM_2,
TPS6586X_INT_PSM_3,
TPS6586X_INT_RTC_ALM1,
TPS6586X_INT_ACUSB_OVP,
TPS6586X_INT_USB_DET,
TPS6586X_INT_AC_DET,
TPS6586X_INT_BAT_DET,
TPS6586X_INT_CHG_STAT,
TPS6586X_INT_CHG_TEMP,
TPS6586X_INT_PP,
TPS6586X_INT_RESUME,
TPS6586X_INT_LOW_SYS,
TPS6586X_INT_RTC_ALM2,
};
struct tps6586x_subdev_info {
int id;
const char *name;
@ -29,6 +59,7 @@ struct tps6586x_platform_data {
struct tps6586x_subdev_info *subdevs;
int gpio_base;
int irq_base;
};
/*