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clk: Extend clock control with an optional data field

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Some systems require more than a single ID to identify and configure any
clock provider. For those scenarios add an optional data field to the
clock control structure.

Reviewed-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Andreas Dannenberg <dannenberg@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
This commit is contained in:
Andreas Dannenberg 2018-08-27 15:57:42 +05:30 committed by Tom Rini
parent 65c8a79811
commit 3b3969bd36
1 changed files with 7 additions and 5 deletions
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12
include/clk.h
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@ -40,10 +40,12 @@ struct udevice;
*
* @dev: The device which implements the clock signal.
* @id: The clock signal ID within the provider.
* @data: An optional data field for scenarios where a single integer ID is not
* sufficient. If used, it can be populated through an .of_xlate op and
* processed during the various clock ops.
*
* Currently, the clock API assumes that a single integer ID is enough to
* identify and configure any clock signal for any clock provider. If this
* assumption becomes invalid in the future, the struct could be expanded to
* Should additional information to identify and configure any clock signal
* for any provider be required in the future, the struct could be expanded to
* either (a) add more fields to allow clock providers to store additional
* information, or (b) replace the id field with an opaque pointer, which the
* provider would dynamically allocated during its .of_xlate op, and process
@ -53,10 +55,10 @@ struct udevice;
struct clk {
struct udevice *dev;
/*
* Written by of_xlate. We assume a single id is enough for now. In the
* future, we might add more fields here.
* Written by of_xlate. In the future, we might add more fields here.
*/
unsigned long id;
unsigned long data;
};
/**