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regmap: Apply optional delay in multi_reg_write/register_patch

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Add an optional delay_us field in reg_sequence to allow the client to
specify a delay (in microseconds) to be applied after any given write
in a sequence of writes.

We treat a delay in a sequence the same way we treat a page change as
they are logically similar in that you can coalesce all write before
a delay (in the same way you can coalesce all writes before a page
change is needed)

Signed-off-by: Nariman Poushin <nariman@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Nariman Poushin
2015-07-16 16:36:22 +01:00
committed by Mark Brown
parent 8019ff6cfc
commit 2de9d6006c
2 changed files with 52 additions and 7 deletions
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5
include/linux/regmap.h
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@@ -51,14 +51,17 @@ struct reg_default {
};
/**
* Register/value pairs for sequences of writes
* Register/value pairs for sequences of writes with an optional delay in
* microseconds to be applied after each write.
*
* @reg: Register address.
* @def: Register value.
* @delay_us: Delay to be applied after the register write in microseconds
*/
struct reg_sequence {
unsigned int reg;
unsigned int def;
unsigned int delay_us;
};
#ifdef CONFIG_REGMAP