[PATCH 5/5] mfd: tps65090: use regmap irq framework for interrupt support

Laxman Dewangan
2012-10-07T15:56:29Z

Use the regmap irq framework for implementing TPS65090 interrupt
support in place of implementing it locally.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
drivers/mfd/tps65090.c | 263 ++++++++++++++++--------------------------
include/linux/mfd/tps65090.h | 23 +++-
2 files changed, 118 insertions(+), 168 deletions(-)

diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c
index 355a077..2eaae52 100644
--- a/drivers/mfd/tps65090.c
+++ b/drivers/mfd/tps65090.c
@@ -38,35 +38,21 @@
#define TPS65090_INT_MSK 0x2
#define TPS65090_INT_MSK2 0x3

-struct tps65090_irq_data {
- u8 mask_reg;
- u8 mask_pos;
-};
-
-#define TPS65090_IRQ(_reg, _mask_pos) \
- { \
- .mask_reg = (_reg), \
- .mask_pos = (_mask_pos), \
- }
-
-static const struct tps65090_irq_data tps65090_irqs[] = {
- [0] = TPS65090_IRQ(0, 0),
- [1] = TPS65090_IRQ(0, 1),
- [2] = TPS65090_IRQ(0, 2),
- [3] = TPS65090_IRQ(0, 3),
- [4] = TPS65090_IRQ(0, 4),
- [5] = TPS65090_IRQ(0, 5),
- [6] = TPS65090_IRQ(0, 6),
- [7] = TPS65090_IRQ(0, 7),
- [8] = TPS65090_IRQ(1, 0),
- [9] = TPS65090_IRQ(1, 1),
- [10] = TPS65090_IRQ(1, 2),
- [11] = TPS65090_IRQ(1, 3),
- [12] = TPS65090_IRQ(1, 4),
- [13] = TPS65090_IRQ(1, 5),
- [14] = TPS65090_IRQ(1, 6),
- [15] = TPS65090_IRQ(1, 7),
-};
+#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 1
+#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 2
+#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 3
+#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 4
+#define TPS65090_INT1_MASK_CHARGING_COMPLETE 5
+#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 6
+#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 7
+#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 0
+#define TPS65090_INT2_MASK_OVERLOAD_FET1 1
+#define TPS65090_INT2_MASK_OVERLOAD_FET2 2
+#define TPS65090_INT2_MASK_OVERLOAD_FET3 3
+#define TPS65090_INT2_MASK_OVERLOAD_FET4 4
+#define TPS65090_INT2_MASK_OVERLOAD_FET5 5
+#define TPS65090_INT2_MASK_OVERLOAD_FET6 6
+#define TPS65090_INT2_MASK_OVERLOAD_FET7 7

static struct mfd_cell tps65090s[] = {
{
@@ -77,132 +63,77 @@ static struct mfd_cell tps65090s[] = {
},
};

-static void tps65090_irq_lock(struct irq_data *data)
-{
- struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
-
- mutex_lock(&tps65090->irq_lock);
-}
-
-static void tps65090_irq_mask(struct irq_data *irq_data)
-{
- struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
- unsigned int __irq = irq_data->hwirq;
- const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
-
- tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
- data->mask_pos);
-}
-
-static void tps65090_irq_unmask(struct irq_data *irq_data)
-{
- struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
- unsigned int __irq = irq_data->irq - tps65090->irq_base;
- const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
-
- tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
- data->mask_pos);
-}
-
-static void tps65090_irq_sync_unlock(struct irq_data *data)
-{
- struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
-
- mutex_unlock(&tps65090->irq_lock);
-}
-
-static irqreturn_t tps65090_irq(int irq, void *data)
-{
- struct tps65090 *tps65090 = data;
- int ret = 0;
- u8 status, mask;
- unsigned long int acks = 0;
- int i;
-
- for (i = 0; i < NUM_INT_REG; i++) {
- ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
- if (ret < 0) {
- dev_err(tps65090->dev,
- "failed to read mask reg [addr:%d]\n",
- TPS65090_INT_MSK + i);
- return IRQ_NONE;
- }
- ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
- &status);
- if (ret < 0) {
- dev_err(tps65090->dev,
- "failed to read status reg [addr:%d]\n",
- TPS65090_INT_STS + i);
- return IRQ_NONE;
- }
- if (status) {
- /* Ack only those interrupts which are not masked */
- status &= (~mask);
- ret = tps65090_write(tps65090->dev,
- TPS65090_INT_STS + i, status);
- if (ret < 0) {
- dev_err(tps65090->dev,
- "failed to write interrupt status\n");
- return IRQ_NONE;
- }
- acks |= (status << (i * 8));
- }
- }
-
- for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
- handle_nested_irq(tps65090->irq_base + i);
- return acks ? IRQ_HANDLED : IRQ_NONE;
-}
-
-static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
- int irq_base)
-{
- int i, ret;
-
- if (!irq_base) {
- dev_err(tps65090->dev, "IRQ base not set\n");
- return -EINVAL;
- }
-
- mutex_init(&tps65090->irq_lock);
-
- for (i = 0; i < NUM_INT_REG; i++)
- tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);
-
- for (i = 0; i < NUM_INT_REG; i++)
- tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);
-
- tps65090->irq_base = irq_base;
- tps65090->irq_chip.name = "tps65090";
- tps65090->irq_chip.irq_mask = tps65090_irq_mask;
- tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
- tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
- tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;
-
- for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
- int __irq = i + tps65090->irq_base;
- irq_set_chip_data(__irq, tps65090);
- irq_set_chip_and_handler(__irq, &tps65090->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, tps65090_irq, IRQF_ONESHOT,
- "tps65090", tps65090);
- if (!ret) {
- device_init_wakeup(tps65090->dev, 1);
- enable_irq_wake(irq);
- }
+static const struct regmap_irq tps65090_irqs[] = {
+ /* INT1 IRQs*/
+ [TPS65090_IRQ_VAC_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_BAT_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {
+ .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,
+ },
+ [TPS65090_IRQ_CHARGING_COMPLETE] = {
+ .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,
+ },
+ [TPS65090_IRQ_OVERLOAD_DCDC1] = {
+ .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,
+ },
+ [TPS65090_IRQ_OVERLOAD_DCDC2] = {
+ .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,
+ },
+ /* INT2 IRQs*/
+ [TPS65090_IRQ_OVERLOAD_DCDC3] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET1] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET2] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET3] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET4] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET5] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET6] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,
+ },
+ [TPS65090_IRQ_OVERLOAD_FET7] = {
+ .reg_offset = 1,
+ .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,
+ },
+};

- return ret;
-}
+static struct regmap_irq_chip tps65090_irq_chip = {
+ .name = "tps65090",
+ .irqs = tps65090_irqs,
+ .num_irqs = ARRAY_SIZE(tps65090_irqs),
+ .num_regs = NUM_INT_REG,
+ .status_base = TPS65090_INT_STS,
+ .mask_base = TPS65090_INT_MSK,
+ .mask_invert = true,
+};

static bool is_volatile_reg(struct device *dev, unsigned int reg)
{
- if (reg == TPS65090_INT_STS)
+ if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS2))
return true;
else
return false;
@@ -238,24 +169,27 @@ static int __devinit tps65090_i2c_probe(struct i2c_client *client,
tps65090->dev = &client->dev;
i2c_set_clientdata(client, tps65090);

- if (client->irq) {
- ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
- if (ret) {
- dev_err(&client->dev, "IRQ init failed with err: %d\n",
- ret);
- goto err_exit;
- }
- }
-
tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);
if (IS_ERR(tps65090->rmap)) {
ret = PTR_ERR(tps65090->rmap);
dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);
- goto err_irq_exit;
+ return ret;
+ }
+
+ if (client->irq) {
+ ret = regmap_add_irq_chip(tps65090->rmap, client->irq,
+ IRQF_ONESHOT | IRQF_TRIGGER_LOW, pdata->irq_base,
+ &tps65090_irq_chip, &tps65090->irq_data);
+ if (ret) {
+ dev_err(&client->dev,
+ "IRQ init failed with err: %d\n", ret);
+ return ret;
+ }
}

ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
- ARRAY_SIZE(tps65090s), NULL, 0, NULL);
+ ARRAY_SIZE(tps65090s), NULL,
+ regmap_irq_chip_get_base(tps65090->irq_data), NULL);
if (ret) {
dev_err(&client->dev, "add mfd devices failed with err: %d\n",
ret);
@@ -266,8 +200,7 @@ static int __devinit tps65090_i2c_probe(struct i2c_client *client,

err_irq_exit:
if (client->irq)
- free_irq(client->irq, tps65090);
-err_exit:
+ regmap_del_irq_chip(client->irq, tps65090->irq_data);
return ret;
}

@@ -277,7 +210,7 @@ static int __devexit tps65090_i2c_remove(struct i2c_client *client)

mfd_remove_devices(tps65090->dev);
if (client->irq)
- free_irq(client->irq, tps65090);
+ regmap_del_irq_chip(client->irq, tps65090->irq_data);

return 0;
}
diff --git a/include/linux/mfd/tps65090.h b/include/linux/mfd/tps65090.h
index 1a5f916..4bbbb13 100644
--- a/include/linux/mfd/tps65090.h
+++ b/include/linux/mfd/tps65090.h
@@ -25,12 +25,29 @@
#include <linux/irq.h>
#include <linux/regmap.h>

+/* TPS65090 IRQs */
+enum {
+ TPS65090_IRQ_VAC_STATUS_CHANGE,
+ TPS65090_IRQ_VSYS_STATUS_CHANGE,
+ TPS65090_IRQ_BAT_STATUS_CHANGE,
+ TPS65090_IRQ_CHARGING_STATUS_CHANGE,
+ TPS65090_IRQ_CHARGING_COMPLETE,
+ TPS65090_IRQ_OVERLOAD_DCDC1,
+ TPS65090_IRQ_OVERLOAD_DCDC2,
+ TPS65090_IRQ_OVERLOAD_DCDC3,
+ TPS65090_IRQ_OVERLOAD_FET1,
+ TPS65090_IRQ_OVERLOAD_FET2,
+ TPS65090_IRQ_OVERLOAD_FET3,
+ TPS65090_IRQ_OVERLOAD_FET4,
+ TPS65090_IRQ_OVERLOAD_FET5,
+ TPS65090_IRQ_OVERLOAD_FET6,
+ TPS65090_IRQ_OVERLOAD_FET7,
+};
+
struct tps65090 {
struct device *dev;
struct regmap *rmap;
- struct irq_chip irq_chip;
- struct mutex irq_lock;
- int irq_base;
+ struct regmap_irq_chip_data *irq_data;
};

struct tps65090_platform_data {
--
1.7.1.1