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regmap-irq: Introduce config registers for irq types
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>
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Aidan MacDonald
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Mark Brown
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Jun 29, 2022
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