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regmap-irq: Introduce inverted status registers support 

Some interrupt controllers have inverted status register:
cleared bits is active interrupts and set bits is inactive interrupts,
so add inverted status support to the framework.

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Link: https://lore.kernel.org/r/20210525034204.5272-1-fido_max@inbox.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Maxim Kochetkov 2021-05-25 06:42:03 +03:00 committed by Mark Brown
parent b24412aff3
commit bcd23f93d3
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2 changed files with 9 additions and 0 deletions
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7
drivers/base/regmap/regmap-irq.c
View File

@ -531,6 +531,10 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
} }
} }
if (chip->status_invert)
for (i = 0; i < data->chip->num_regs; i++)
data->status_buf[i] = ~data->status_buf[i];
/* /*
* Ignore masked IRQs and ack if we need to; we ack early so * Ignore masked IRQs and ack if we need to; we ack early so
* there is no race between handling and acknowleding the * there is no race between handling and acknowleding the
@ -800,6 +804,9 @@ int regmap_add_irq_chip_fwnode(struct fwnode_handle *fwnode,
goto err_alloc; goto err_alloc;
} }
if (chip->status_invert)
d->status_buf[i] = ~d->status_buf[i];
if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) { if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) {
reg = sub_irq_reg(d, d->chip->ack_base, i); reg = sub_irq_reg(d, d->chip->ack_base, i);
if (chip->ack_invert) if (chip->ack_invert)

2
include/linux/regmap.h
View File

@ -1449,6 +1449,7 @@ struct regmap_irq_sub_irq_map {
* @not_fixed_stride: Used when chip peripherals are not laid out with fixed * @not_fixed_stride: Used when chip peripherals are not laid out with fixed
* stride. Must be used with sub_reg_offsets containing the * stride. Must be used with sub_reg_offsets containing the
* offsets to each peripheral. * offsets to each peripheral.
* @status_invert: Inverted status register: cleared bits are active interrupts.
* @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.
* *
* @num_regs: Number of registers in each control bank. * @num_regs: Number of registers in each control bank.
@ -1501,6 +1502,7 @@ struct regmap_irq_chip {
bool type_in_mask:1; bool type_in_mask:1;
bool clear_on_unmask:1; bool clear_on_unmask:1;
bool not_fixed_stride:1; bool not_fixed_stride:1;
bool status_invert:1;
int num_regs; int num_regs;