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clocksource: sh_cmt: Add support for multiple channels per device

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CMT hardware devices can support multiple channels, with global
registers and per-channel registers. The sh_cmt driver currently models
the hardware with one Linux device per channel. This model makes it
difficult to handle global registers in a clean way.

Add support for a new model that uses one Linux device per timer with
multiple channels per device. This requires changes to platform data,
add new channel configuration fields.

Support for the legacy model is kept and will be removed after all
platforms switch to the new model.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Laurent Pinchart
2014-01-28 12:36:48 +01:00
parent fb28a65981
commit 81b3b27110
2 changed files with 248 additions and 79 deletions
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include/linux/sh_timer.h
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@@ -7,6 +7,7 @@ struct sh_timer_config {
int timer_bit;
unsigned long clockevent_rating;
unsigned long clocksource_rating;
unsigned int channels_mask;
};
#endif /* __SH_TIMER_H__ */