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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/base/regmap/regmap-irq.c
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/base/regmap/regmap-irq.c')
-rw-r--r--kernel/drivers/base/regmap/regmap-irq.c58
1 files changed, 42 insertions, 16 deletions
diff --git a/kernel/drivers/base/regmap/regmap-irq.c b/kernel/drivers/base/regmap/regmap-irq.c
index a6c3f75b4..8d16db533 100644
--- a/kernel/drivers/base/regmap/regmap-irq.c
+++ b/kernel/drivers/base/regmap/regmap-irq.c
@@ -63,6 +63,7 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
struct regmap *map = d->map;
int i, ret;
u32 reg;
+ u32 unmask_offset;
if (d->chip->runtime_pm) {
ret = pm_runtime_get_sync(map->dev);
@@ -79,12 +80,28 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
for (i = 0; i < d->chip->num_regs; i++) {
reg = d->chip->mask_base +
(i * map->reg_stride * d->irq_reg_stride);
- if (d->chip->mask_invert)
+ if (d->chip->mask_invert) {
ret = regmap_update_bits(d->map, reg,
d->mask_buf_def[i], ~d->mask_buf[i]);
- else
+ } else if (d->chip->unmask_base) {
+ /* set mask with mask_base register */
+ ret = regmap_update_bits(d->map, reg,
+ d->mask_buf_def[i], ~d->mask_buf[i]);
+ if (ret < 0)
+ dev_err(d->map->dev,
+ "Failed to sync unmasks in %x\n",
+ reg);
+ unmask_offset = d->chip->unmask_base -
+ d->chip->mask_base;
+ /* clear mask with unmask_base register */
+ ret = regmap_update_bits(d->map,
+ reg + unmask_offset,
+ d->mask_buf_def[i],
+ d->mask_buf[i]);
+ } else {
ret = regmap_update_bits(d->map, reg,
d->mask_buf_def[i], d->mask_buf[i]);
+ }
if (ret != 0)
dev_err(d->map->dev, "Failed to sync masks in %x\n",
reg);
@@ -109,14 +126,18 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
if (!d->chip->init_ack_masked)
continue;
/*
- * Ack all the masked interrupts uncondictionly,
+ * Ack all the masked interrupts unconditionally,
* OR if there is masked interrupt which hasn't been Acked,
* it'll be ignored in irq handler, then may introduce irq storm
*/
if (d->mask_buf[i] && (d->chip->ack_base || d->chip->use_ack)) {
reg = d->chip->ack_base +
(i * map->reg_stride * d->irq_reg_stride);
- ret = regmap_write(map, reg, d->mask_buf[i]);
+ /* some chips ack by write 0 */
+ if (d->chip->ack_invert)
+ ret = regmap_write(map, reg, ~d->mask_buf[i]);
+ else
+ ret = regmap_write(map, reg, d->mask_buf[i]);
if (ret != 0)
dev_err(d->map->dev, "Failed to ack 0x%x: %d\n",
reg, ret);
@@ -209,7 +230,7 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
* Read in the statuses, using a single bulk read if possible
* in order to reduce the I/O overheads.
*/
- if (!map->use_single_rw && map->reg_stride == 1 &&
+ if (!map->use_single_read && map->reg_stride == 1 &&
data->irq_reg_stride == 1) {
u8 *buf8 = data->status_reg_buf;
u16 *buf16 = data->status_reg_buf;
@@ -306,19 +327,12 @@ static int regmap_irq_map(struct irq_domain *h, unsigned int virq,
irq_set_chip_data(virq, data);
irq_set_chip(virq, &data->irq_chip);
irq_set_nested_thread(virq, 1);
-
- /* ARM needs us to explicitly flag the IRQ as valid
- * and will set them noprobe when we do so. */
-#ifdef CONFIG_ARM
- set_irq_flags(virq, IRQF_VALID);
-#else
irq_set_noprobe(virq);
-#endif
return 0;
}
-static struct irq_domain_ops regmap_domain_ops = {
+static const struct irq_domain_ops regmap_domain_ops = {
.map = regmap_irq_map,
.xlate = irq_domain_xlate_twocell,
};
@@ -346,6 +360,7 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
int i;
int ret = -ENOMEM;
u32 reg;
+ u32 unmask_offset;
if (chip->num_regs <= 0)
return -EINVAL;
@@ -405,7 +420,7 @@ 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 &&
+ if (!map->use_single_read && map->reg_stride == 1 &&
d->irq_reg_stride == 1) {
d->status_reg_buf = kmalloc(map->format.val_bytes *
chip->num_regs, GFP_KERNEL);
@@ -427,7 +442,14 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
if (chip->mask_invert)
ret = regmap_update_bits(map, reg,
d->mask_buf[i], ~d->mask_buf[i]);
- else
+ else if (d->chip->unmask_base) {
+ unmask_offset = d->chip->unmask_base -
+ d->chip->mask_base;
+ ret = regmap_update_bits(d->map,
+ reg + unmask_offset,
+ d->mask_buf[i],
+ d->mask_buf[i]);
+ } else
ret = regmap_update_bits(map, reg,
d->mask_buf[i], d->mask_buf[i]);
if (ret != 0) {
@@ -452,7 +474,11 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) {
reg = chip->ack_base +
(i * map->reg_stride * d->irq_reg_stride);
- ret = regmap_write(map, reg,
+ if (chip->ack_invert)
+ ret = regmap_write(map, reg,
+ ~(d->status_buf[i] & d->mask_buf[i]));
+ else
+ ret = regmap_write(map, reg,
d->status_buf[i] & d->mask_buf[i]);
if (ret != 0) {
dev_err(map->dev, "Failed to ack 0x%x: %d\n",