static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
{
struct device *parent = pdev->dev.parent;
struct regulator_init_data *p = pdev->dev.platform_data;
struct tps6586x_settings *setting = p->driver_data;
uint8_t reg;
if (setting == NULL)
return 0;
if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
return 0;
/* only SM0 and SM1 can have the slew rate settings */
switch (pdev->id) {
case TPS6586X_ID_SM_0:
reg = TPS6586X_SM0SL;
break;
case TPS6586X_ID_SM_1:
reg = TPS6586X_SM1SL;
break;
default:
dev_warn(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
return -EINVAL;
}
return tps6586x_write(parent, reg,
setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
}
/*
* TPS6586X has 2 enable bits that are OR'ed to determine the actual
* regulator state. Clearing one of this bits allows switching
* regulator on and of with single register write.
*/
static inline int tps6586x_regulator_preinit(struct device *parent,
struct tps6586x_regulator *ri)
{
uint8_t val1, val2;
int ret;
#ifdef CONFIG_MACH_SAMSUNG_VARIATION_TEGRA
/*
* set SM0V1 : 1.325V --> 1.2V
* because the default TPS6586X SM0V1[0x26]:1.325V,
* SM0V2:1.2V, but SM0 voltage selector points SM0V1
* our spec of v_core : 1.2V
*/
if (ri->desc.id == TPS6586X_ID_SM_0) {
int ret;
ret = tps6586x_write(parent, TPS6586X_SM0V1, 0x13);
if (ret)
return ret;
}
#endif
if (ri->enable_reg[0] == ri->enable_reg[1] &&
ri->enable_bit[0] == ri->enable_bit[1])
return 0;
ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
if (ret)
return ret;
ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
if (ret)
return ret;
if (!(val2 & (1 << ri->enable_bit[1])))
return 0;
/*
* The regulator is on, but it's enabled with the bit we don't
* want to use, so we switch the enable bits
*/
if (!(val1 & (1 << ri->enable_bit[0]))) {
ret = tps6586x_set_bits(parent, ri->enable_reg[0],
1 << ri->enable_bit[0]);
if (ret)
return ret;
}
return tps6586x_clr_bits(parent, ri->enable_reg[1],
1 << ri->enable_bit[1]);
}
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.irq_enable = tps6586x_irq_enable;
tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
int __irq = i + tps6586x->irq_base;
irq_set_chip_data(__irq, tps6586x);
irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
handle_simple_irq);
irq_set_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 set_voltage(int reg, int data, int rate)
{
uchar control_bit;
uchar buff[3];
control_bit = (reg == SM0_VOLTAGE_V1 ? CTRL_SM0_RAMP : CTRL_SM1_RAMP);
/*
* Only one supply is needed in u-boot. set both v1 and v2 to
* same value.
*
* When both v1 and v2 are set to same value, we just need to set
* control1 reg to trigger the supply selection.
*/
buff[0] = buff[1] = (uchar)data;
buff[2] = rate;
/* write v1, v2 and rate, then trigger */
if (tps6586x_write(reg, buff, 3) ||
tps6586x_write(SUPPLY_CONTROL1, &control_bit, 1))
return -1;
return 0;
}
static void tps6586x_irq_sync_unlock(struct irq_data *data)
{
struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
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);
}
int tps6586x_set_pwm_mode(int mask)
{
uchar val;
int ret;
assert(tps6586x_dev);
ret = tps6586x_read(PFM_MODE);
if (ret != -1) {
val = (uchar)ret;
val |= mask;
ret = tps6586x_write(PFM_MODE, &val, 1);
}
if (ret == -1)
debug("%s: Failed to read/write PWM mode reg\n", __func__);
return ret;
}
static inline int tps6586x_regulator_set_slew_rate(struct platform_device *pdev)
{
struct device *parent = pdev->dev.parent;
struct regulator_init_data *p = pdev->dev.platform_data;
struct tps6586x_settings *setting = p->driver_data;
uint8_t reg;
if (setting == NULL)
return 0;
/* only SM0 and SM1 can have the slew rate settings */
switch (pdev->id) {
case TPS6586X_ID_SM_0:
reg = TPS6586X_SM0SL;
break;
case TPS6586X_ID_SM_1:
reg = TPS6586X_SM1SL;
break;
default:
return 0;
}
return tps6586x_write(parent, reg, setting->slew_rate);
}
