1 files changed, 100 insertions, 26 deletions

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 5972ad958544..020ea2b9fd2f 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -34,6 +34,7 @@ struct regmap_irq_chip_data {
         int irq;
         int wake_count;
 
+        void *status_reg_buf;
         unsigned int *status_buf;
         unsigned int *mask_buf;
         unsigned int *mask_buf_def;
@@ -87,6 +88,23 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
                 if (ret != 0)
                         dev_err(d->map->dev, "Failed to sync masks in %x\n",
                                 reg);
+
+                reg = d->chip->wake_base +
+                        (i * map->reg_stride * d->irq_reg_stride);
+                if (d->wake_buf) {
+                        if (d->chip->wake_invert)
+                                ret = regmap_update_bits(d->map, reg,
+                                                         d->mask_buf_def[i],
+                                                         ~d->wake_buf[i]);
+                        else
+                                ret = regmap_update_bits(d->map, reg,
+                                                         d->mask_buf_def[i],
+                                                         d->wake_buf[i]);
+                        if (ret != 0)
+                                dev_err(d->map->dev,
+                                        "Failed to sync wakes in %x: %d\n",
+                                        reg, ret);
+                }
         }
 
         if (d->chip->runtime_pm)
@@ -129,16 +147,15 @@ static int regmap_irq_set_wake(struct irq_data *data, unsigned int on)
         struct regmap *map = d->map;
         const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
 
-        if (!d->chip->wake_base)
-                return -EINVAL;
-
         if (on) {
-                d->wake_buf[irq_data->reg_offset / map->reg_stride]
-                        &= ~irq_data->mask;
+                if (d->wake_buf)
+                        d->wake_buf[irq_data->reg_offset / map->reg_stride]
+                                &= ~irq_data->mask;
                 d->wake_count++;
         } else {
-                d->wake_buf[irq_data->reg_offset / map->reg_stride]
-                        |= irq_data->mask;
+                if (d->wake_buf)
+                        d->wake_buf[irq_data->reg_offset / map->reg_stride]
+                                |= irq_data->mask;
                 d->wake_count--;
         }
 
@@ -167,30 +184,75 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
                 if (ret < 0) {
                         dev_err(map->dev, "IRQ thread failed to resume: %d\n",
                                 ret);
+                        pm_runtime_put(map->dev);
                         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
-         * interrupt.  We assume that typically few of the interrupts
-         * will fire simultaneously so don't worry about overhead from
-         * doing a write per register.
+         * Read in the statuses, using a single bulk read if possible
+         * in order to reduce the I/O overheads.
          */
-        for (i = 0; i < data->chip->num_regs; i++) {
-                ret = regmap_read(map, chip->status_base + (i * map->reg_stride
-                                   * data->irq_reg_stride),
-                                   &data->status_buf[i]);
+        if (!map->use_single_rw && map->reg_stride == 1 &&
+            data->irq_reg_stride == 1) {
+                u8 *buf8 = data->status_reg_buf;
+                u16 *buf16 = data->status_reg_buf;
+                u32 *buf32 = data->status_reg_buf;
 
+                BUG_ON(!data->status_reg_buf);
+
+                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);
-                        if (chip->runtime_pm)
-                                pm_runtime_put(map->dev);
+                                ret);
                         return IRQ_NONE;
                 }
 
+                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();
+                                return IRQ_NONE;
+                        }
+                }
+
+        } else {
+                for (i = 0; i < data->chip->num_regs; i++) {
+                        ret = regmap_read(map, chip->status_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);
+                                if (chip->runtime_pm)
+                                        pm_runtime_put(map->dev);
+                                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
+         * interrupt.  We assume that typically few of the interrupts
+         * will fire simultaneously so don't worry about overhead from
+         * doing a write per register.
+         */
+        for (i = 0; i < data->chip->num_regs; i++) {
                 data->status_buf[i] &= ~data->mask_buf[i];
 
                 if (data->status_buf[i] && chip->ack_base) {
@@ -316,11 +378,6 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 
         d->irq_chip = regmap_irq_chip;
         d->irq_chip.name = chip->name;
-        if (!chip->wake_base) {
-                d->irq_chip.irq_set_wake = NULL;
-                d->irq_chip.flags |= IRQCHIP_MASK_ON_SUSPEND |
-                                     IRQCHIP_SKIP_SET_WAKE;
-        }
         d->irq = irq;
         d->map = map;
         d->chip = chip;
@@ -331,6 +388,14 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
         else
                 d->irq_reg_stride = 1;
 
+        if (!map->use_single_rw && map->reg_stride == 1 &&
+            d->irq_reg_stride == 1) {
+                d->status_reg_buf = kmalloc(map->format.val_bytes *
+                                            chip->num_regs, GFP_KERNEL);
+                if (!d->status_reg_buf)
+                        goto err_alloc;
+        }
+
         mutex_init(&d->lock);
 
         for (i = 0; i < chip->num_irqs; i++)
@@ -361,8 +426,15 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
                         d->wake_buf[i] = d->mask_buf_def[i];
                         reg = chip->wake_base +
                                 (i * map->reg_stride * d->irq_reg_stride);
-                        ret = regmap_update_bits(map, reg, d->wake_buf[i],
-                                                 d->wake_buf[i]);
+
+                        if (chip->wake_invert)
+                                ret = regmap_update_bits(map, reg,
+                                                         d->mask_buf_def[i],
+                                                         0);
+                        else
+                                ret = regmap_update_bits(map, reg,
+                                                         d->mask_buf_def[i],
+                                                         d->wake_buf[i]);
                         if (ret != 0) {
                                 dev_err(map->dev, "Failed to set masks in 0x%x: %d\n",
                                         reg, ret);
@@ -401,6 +473,7 @@ err_alloc:
         kfree(d->mask_buf_def);
         kfree(d->mask_buf);
         kfree(d->status_buf);
+        kfree(d->status_reg_buf);
         kfree(d);
         return ret;
 }
@@ -422,6 +495,7 @@ void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d)
         kfree(d->wake_buf);
         kfree(d->mask_buf_def);
         kfree(d->mask_buf);
+        kfree(d->status_reg_buf);
         kfree(d->status_buf);
         kfree(d);
 }