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Config registers provide a more uniform approach to handling irq type
registers. They are essentially an extension of the virtual registers
used by the qcom-pm8008 driver.
Config registers can be represented as a 2D array:
config_base[0] reg0,0 reg0,1 reg0,2 reg0,3
config_base[1] reg1,0 reg1,1 reg1,2 reg1,3
config_base[2] reg2,0 reg2,1 reg2,2 reg2,3
There are 'num_config_bases' base registers, each of which is used to
address 'num_config_regs' registers. The addresses are calculated in
the same way as for other bases. It is assumed that an irq's type is
controlled by one column of registers; that column is identified by
the irq's 'type_reg_offset'.
The set_type_config() callback is responsible for updating the config
register contents. It receives an array of buffers (each represents a
row of registers) and the index of the column to update, along with
the 'struct regmap_irq' description and requested irq type.
Buffered values are written to registers in regmap_irq_sync_unlock().
Note that the entire register contents are overwritten, which is a
minor change in behavior from type registers via 'type_base'.
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
Link: https://lore.kernel.org/r/20220623211420.918875-9-aidanmacdonald.0x0@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
faa87ce919