Unverified Commit bcd23f93 authored by Maxim Kochetkov's avatar Maxim Kochetkov Committed by Mark Brown
Browse files

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: default avatarMaxim Kochetkov <fido_max@inbox.ru>
Link: https://lore.kernel.org/r/20210525034204.5272-1-fido_max@inbox.ru


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent b24412af

drivers/base/regmap/regmap-irq.c

+7 −0
Original line number Diff line number Diff line
@@ -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

	 * 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;

		}



		if (chip->status_invert)

			d->status_buf[i] = ~d->status_buf[i];



		if (d->status_buf[i] && (chip->ack_base || chip->use_ack)) {

			reg = sub_irq_reg(d, d->chip->ack_base, i);

			if (chip->ack_invert)

include/linux/regmap.h

+2 −0
Original line number Diff line number Diff line
@@ -1449,6 +1449,7 @@ struct regmap_irq_sub_irq_map { 
 * @not_fixed_stride: Used when chip peripherals are not laid out with fixed

 * 		      stride. Must be used with sub_reg_offsets containing the

 * 		      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.

 *

 * @num_regs:    Number of registers in each control bank.
@@ -1501,6 +1502,7 @@ struct regmap_irq_chip { 
	bool type_in_mask:1;

	bool clear_on_unmask:1;

	bool not_fixed_stride:1;

	bool status_invert:1;



	int num_regs;