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TPS65911: Add new irq definitions
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TPS65911 adds new interrupt sources, as well as two new registers
to handle them, one for interrupt status and one for interrupt
masking. The added irqs are:

-VMBCH2 - Low and High threshold
-GPIO1-8 - Rising and falling edge detection
-WTCHDG - Watchdog interrupt
-PWRDN	- PWRDN reset interrupt

The code should handle these new registers only when the chip
version is TPS65911.

Signed-off-by: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
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Jorge Eduardo Candelaria authored and Liam Girdwood committed May 27, 2011
1 parent a320e3c commit a297473
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Showing 2 changed files with 75 additions and 14 deletions.
57 changes: 44 additions & 13 deletions drivers/mfd/tps65910-irq.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -41,27 +41,37 @@ static inline int irq_to_tps65910_irq(struct tps65910 *tps65910,
static irqreturn_t tps65910_irq(int irq, void *irq_data)
{
struct tps65910 *tps65910 = irq_data;
u16 irq_sts;
u16 irq_mask;
u32 irq_sts;
u32 irq_mask;
u8 reg;
int i;

tps65910->read(tps65910, TPS65910_INT_STS, 1, &reg);
irq_sts = reg;
tps65910->read(tps65910, TPS65910_INT_STS2, 1, &reg);
irq_sts |= reg << 8;
switch (tps65910_chip_id(tps65910)) {
case TPS65911:
tps65910->read(tps65910, TPS65910_INT_STS3, 1, &reg);
irq_sts |= reg << 16;
}

tps65910->read(tps65910, TPS65910_INT_MSK, 1, &reg);
irq_mask = reg;
tps65910->read(tps65910, TPS65910_INT_MSK2, 1, &reg);
irq_mask |= reg << 8;
switch (tps65910_chip_id(tps65910)) {
case TPS65911:
tps65910->read(tps65910, TPS65910_INT_MSK3, 1, &reg);
irq_mask |= reg << 16;
}

irq_sts &= ~irq_mask;

if (!irq_sts)
return IRQ_NONE;

for (i = 0; i < TPS65910_NUM_IRQ; i++) {
for (i = 0; i < tps65910->irq_num; i++) {

if (!(irq_sts & (1 << i)))
continue;
Expand All @@ -71,9 +81,15 @@ static irqreturn_t tps65910_irq(int irq, void *irq_data)

/* Write the STS register back to clear IRQs we handled */
reg = irq_sts & 0xFF;
irq_sts >>= 8;
tps65910->write(tps65910, TPS65910_INT_STS, 1, &reg);
reg = irq_sts >> 8;
reg = irq_sts & 0xFF;
tps65910->write(tps65910, TPS65910_INT_STS2, 1, &reg);
switch (tps65910_chip_id(tps65910)) {
case TPS65911:
reg = irq_sts >> 8;
tps65910->write(tps65910, TPS65910_INT_STS3, 1, &reg);
}

return IRQ_HANDLED;
}
Expand All @@ -88,19 +104,29 @@ static void tps65910_irq_lock(struct irq_data *data)
static void tps65910_irq_sync_unlock(struct irq_data *data)
{
struct tps65910 *tps65910 = irq_data_get_irq_chip_data(data);
u16 reg_mask;
u32 reg_mask;
u8 reg;

tps65910->read(tps65910, TPS65910_INT_MSK, 1, &reg);
reg_mask = reg;
tps65910->read(tps65910, TPS65910_INT_MSK2, 1, &reg);
reg_mask |= reg << 8;
switch (tps65910_chip_id(tps65910)) {
case TPS65911:
tps65910->read(tps65910, TPS65910_INT_MSK3, 1, &reg);
reg_mask |= reg << 16;
}

if (tps65910->irq_mask != reg_mask) {
reg = tps65910->irq_mask & 0xFF;
tps65910->write(tps65910, TPS65910_INT_MSK, 1, &reg);
reg = tps65910->irq_mask >> 8;
reg = tps65910->irq_mask >> 8 & 0xFF;
tps65910->write(tps65910, TPS65910_INT_MSK2, 1, &reg);
switch (tps65910_chip_id(tps65910)) {
case TPS65911:
reg = tps65910->irq_mask >> 16;
tps65910->write(tps65910, TPS65910_INT_MSK3, 1, &reg);
}
}
mutex_unlock(&tps65910->irq_lock);
}
Expand Down Expand Up @@ -132,7 +158,6 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
{
int ret, cur_irq;
int flags = IRQF_ONESHOT;
u8 reg;

if (!irq) {
dev_warn(tps65910->dev, "No interrupt support, no core IRQ\n");
Expand All @@ -144,19 +169,22 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,
return -EINVAL;
}

/* Mask top level interrupts */
reg = 0xFF;
tps65910->write(tps65910, TPS65910_INT_MSK, 1, &reg);
reg = 0x03;
tps65910->write(tps65910, TPS65910_INT_MSK2, 1, &reg);
tps65910->irq_mask = 0xFFFFFF;

mutex_init(&tps65910->irq_lock);
tps65910->chip_irq = irq;
tps65910->irq_base = pdata->irq_base;

switch (tps65910_chip_id(tps65910)) {
case TPS65910:
tps65910->irq_num = TPS65910_NUM_IRQ;
case TPS65911:
tps65910->irq_num = TPS65911_NUM_IRQ;
}

/* Register with genirq */
for (cur_irq = tps65910->irq_base;
cur_irq < TPS65910_NUM_IRQ + tps65910->irq_base;
cur_irq < tps65910->irq_num + tps65910->irq_base;
cur_irq++) {
irq_set_chip_data(cur_irq, tps65910);
irq_set_chip_and_handler(cur_irq, &tps65910_irq_chip,
Expand All @@ -174,6 +202,9 @@ int tps65910_irq_init(struct tps65910 *tps65910, int irq,

ret = request_threaded_irq(irq, NULL, tps65910_irq, flags,
"tps65910", tps65910);

irq_set_irq_type(irq, IRQ_TYPE_LEVEL_LOW);

if (ret != 0)
dev_err(tps65910->dev, "Failed to request IRQ: %d\n", ret);

Expand Down
32 changes: 31 additions & 1 deletion include/linux/mfd/tps65910.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -763,6 +763,35 @@
#define TPS65910_IRQ_GPIO_F 9
#define TPS65910_NUM_IRQ 10

#define TPS65911_IRQ_VBAT_VMBDCH 0
#define TPS65911_IRQ_VBAT_VMBDCH2L 1
#define TPS65911_IRQ_VBAT_VMBDCH2H 2
#define TPS65911_IRQ_VBAT_VMHI 3
#define TPS65911_IRQ_PWRON 4
#define TPS65911_IRQ_PWRON_LP 5
#define TPS65911_IRQ_PWRHOLD_F 6
#define TPS65911_IRQ_PWRHOLD_R 7
#define TPS65911_IRQ_HOTDIE 8
#define TPS65911_IRQ_RTC_ALARM 9
#define TPS65911_IRQ_RTC_PERIOD 10
#define TPS65911_IRQ_GPIO0_R 11
#define TPS65911_IRQ_GPIO0_F 12
#define TPS65911_IRQ_GPIO1_R 13
#define TPS65911_IRQ_GPIO1_F 14
#define TPS65911_IRQ_GPIO2_R 15
#define TPS65911_IRQ_GPIO2_F 16
#define TPS65911_IRQ_GPIO3_R 17
#define TPS65911_IRQ_GPIO3_F 18
#define TPS65911_IRQ_GPIO4_R 19
#define TPS65911_IRQ_GPIO4_F 20
#define TPS65911_IRQ_GPIO5_R 21
#define TPS65911_IRQ_GPIO5_F 22
#define TPS65911_IRQ_WTCHDG 23
#define TPS65911_IRQ_PWRDN 24

#define TPS65911_NUM_IRQ 25


/* GPIO Register Definitions */
#define TPS65910_GPIO_DEB BIT(2)
#define TPS65910_GPIO_PUEN BIT(3)
Expand Down Expand Up @@ -806,7 +835,8 @@ struct tps65910 {
struct mutex irq_lock;
int chip_irq;
int irq_base;
u16 irq_mask;
int irq_num;
u32 irq_mask;
};

struct tps65910_platform_data {
Expand Down

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