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regmap: irq: add ack_invert flag for chips using cleared bits as ack

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An user will be CSR SiRFSoC ARM chips.

Signed-off-by: Guo Zeng <Guo.Zeng@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Guo Zeng 2015-09-17 05:23:21 +00:00 • committed by Mark Brown
parent 7b7d1968e4
commit a650fdd942
2 changed files with 12 additions and 2 deletions
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12
drivers/base/regmap/regmap-irq.c
View file

@ -133,7 +133,11 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
if (d->mask_buf[i] && (d->chip->ack_base || d->chip->use_ack)) { if (d->mask_buf[i] && (d->chip->ack_base || d->chip->use_ack)) {
reg = d->chip->ack_base + reg = d->chip->ack_base +
(i * map->reg_stride * d->irq_reg_stride); (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) if (ret != 0)
dev_err(d->map->dev, "Failed to ack 0x%x: %d\n", dev_err(d->map->dev, "Failed to ack 0x%x: %d\n",
reg, ret); reg, ret);
@ -470,7 +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)) { if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) {
reg = chip->ack_base + reg = chip->ack_base +
(i * map->reg_stride * d->irq_reg_stride); (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]); d->status_buf[i] & d->mask_buf[i]);
if (ret != 0) { if (ret != 0) {
dev_err(map->dev, "Failed to ack 0x%x: %d\n", dev_err(map->dev, "Failed to ack 0x%x: %d\n",

2
include/linux/regmap.h
View file

@ -809,6 +809,7 @@ struct regmap_irq {
* @init_ack_masked: Ack all masked interrupts once during initalization. * @init_ack_masked: Ack all masked interrupts once during initalization.
* @mask_invert: Inverted mask register: cleared bits are masked out. * @mask_invert: Inverted mask register: cleared bits are masked out.
* @use_ack: Use @ack register even if it is zero. * @use_ack: Use @ack register even if it is zero.
* @ack_invert: Inverted ack register: cleared bits for ack.
* @wake_invert: Inverted wake register: cleared bits are wake enabled. * @wake_invert: Inverted wake register: cleared bits are wake enabled.
* @runtime_pm: Hold a runtime PM lock on the device when accessing it. * @runtime_pm: Hold a runtime PM lock on the device when accessing it.
* *
@ -829,6 +830,7 @@ struct regmap_irq_chip {
bool init_ack_masked:1; bool init_ack_masked:1;
bool mask_invert:1; bool mask_invert:1;
bool use_ack:1; bool use_ack:1;
bool ack_invert:1;
bool wake_invert:1; bool wake_invert:1;
bool runtime_pm:1; bool runtime_pm:1;