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-rw-r--r--drivers/base/regmap/regmap-irq.c54
-rw-r--r--include/linux/regmap.h2
2 files changed, 23 insertions, 33 deletions
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index db5305b..502cbdb 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -29,10 +29,11 @@ struct regmap_irq_chip_data {
int irq_base;
struct irq_domain *domain;
- void *status_reg_buf;
unsigned int *status_buf;
unsigned int *mask_buf;
unsigned int *mask_buf_def;
+
+ unsigned int irq_reg_stride;
};
static inline const
@@ -62,7 +63,8 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
*/
for (i = 0; i < d->chip->num_regs; i++) {
ret = regmap_update_bits(d->map, d->chip->mask_base +
- (i * map->reg_stride),
+ (i * map->reg_stride *
+ d->irq_reg_stride),
d->mask_buf_def[i], d->mask_buf[i]);
if (ret != 0)
dev_err(d->map->dev, "Failed to sync masks in %x\n",
@@ -104,18 +106,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
struct regmap_irq_chip *chip = data->chip;
struct regmap *map = data->map;
int ret, i;
- u8 *buf8 = data->status_reg_buf;
- u16 *buf16 = data->status_reg_buf;
- u32 *buf32 = data->status_reg_buf;
bool handled = false;
- ret = regmap_bulk_read(map, chip->status_base, data->status_reg_buf,
- chip->num_regs);
- if (ret != 0) {
- dev_err(map->dev, "Failed to read IRQ status: %d\n", ret);
- return IRQ_NONE;
- }
-
/*
* Ignore masked IRQs and ack if we need to; we ack early so
* there is no race between handling and acknowleding the
@@ -124,18 +116,13 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
* doing a write per register.
*/
for (i = 0; i < data->chip->num_regs; i++) {
- switch (map->format.val_bytes) {
- case 1:
- data->status_buf[i] = buf8[i];
- break;
- case 2:
- data->status_buf[i] = buf16[i];
- break;
- case 4:
- data->status_buf[i] = buf32[i];
- break;
- default:
- BUG();
+ ret = regmap_read(map, chip->mask_base + (i * map->reg_stride
+ * data->irq_reg_stride),
+ &data->status_buf[i]);
+
+ if (ret != 0) {
+ dev_err(map->dev, "Failed to read IRQ status: %d\n",
+ ret);
return IRQ_NONE;
}
@@ -143,7 +130,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
if (data->status_buf[i] && chip->ack_base) {
ret = regmap_write(map, chip->ack_base +
- (i * map->reg_stride),
+ (i * map->reg_stride *
+ data->irq_reg_stride),
data->status_buf[i]);
if (ret != 0)
dev_err(map->dev, "Failed to ack 0x%x: %d\n",
@@ -242,11 +230,6 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
if (!d->status_buf)
goto err_alloc;
- d->status_reg_buf = kzalloc(map->format.val_bytes * chip->num_regs,
- GFP_KERNEL);
- if (!d->status_reg_buf)
- goto err_alloc;
-
d->mask_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
GFP_KERNEL);
if (!d->mask_buf)
@@ -260,6 +243,12 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
d->map = map;
d->chip = chip;
d->irq_base = irq_base;
+
+ if (chip->irq_reg_stride)
+ d->irq_reg_stride = chip->irq_reg_stride;
+ else
+ d->irq_reg_stride = 1;
+
mutex_init(&d->lock);
for (i = 0; i < chip->num_irqs; i++)
@@ -269,7 +258,8 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
/* Mask all the interrupts by default */
for (i = 0; i < chip->num_regs; i++) {
d->mask_buf[i] = d->mask_buf_def[i];
- ret = regmap_write(map, chip->mask_base + (i * map->reg_stride),
+ ret = regmap_write(map, chip->mask_base + (i * map->reg_stride
+ * d->irq_reg_stride),
d->mask_buf[i]);
if (ret != 0) {
dev_err(map->dev, "Failed to set masks in 0x%x: %d\n",
@@ -306,7 +296,6 @@ err_domain:
err_alloc:
kfree(d->mask_buf_def);
kfree(d->mask_buf);
- kfree(d->status_reg_buf);
kfree(d->status_buf);
kfree(d);
return ret;
@@ -328,7 +317,6 @@ void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d)
/* We should unmap the domain but... */
kfree(d->mask_buf_def);
kfree(d->mask_buf);
- kfree(d->status_reg_buf);
kfree(d->status_buf);
kfree(d);
}
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 7208668..56af22e 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -219,6 +219,7 @@ struct regmap_irq {
* @status_base: Base status register address.
* @mask_base: Base mask register address.
* @ack_base: Base ack address. If zero then the chip is clear on read.
+ * @irq_reg_stride: Stride to use for chips where registers are not contiguous.
*
* @num_regs: Number of registers in each control bank.
* @irqs: Descriptors for individual IRQs. Interrupt numbers are
@@ -231,6 +232,7 @@ struct regmap_irq_chip {
unsigned int status_base;
unsigned int mask_base;
unsigned int ack_base;
+ unsigned int irq_reg_stride;
int num_regs;