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dm: reset: Update uclass to allow querying reset status

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Add a reset operations function pointer to support querying the current
status of a reset control.

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 15:57:39 +05:30 • committed by Tom Rini
parent aec99c9776
commit e7012e6e1f
3 changed files with 31 additions and 0 deletions
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9
drivers/reset/reset-uclass.c
View file

@ -192,6 +192,15 @@ int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
return 0; return 0;
} }
int reset_status(struct reset_ctl *reset_ctl)
{
struct reset_ops *ops = reset_dev_ops(reset_ctl->dev);
debug("%s(reset_ctl=%p)\n", __func__, reset_ctl);
return ops->rst_status(reset_ctl);
}
int reset_release_all(struct reset_ctl *reset_ctl, int count) int reset_release_all(struct reset_ctl *reset_ctl, int count)
{ {
int i, ret; int i, ret;

8
include/reset-uclass.h
View file

@ -76,6 +76,14 @@ struct reset_ops {
* @return 0 if OK, or a negative error code. * @return 0 if OK, or a negative error code.
*/ */
int (*rst_deassert)(struct reset_ctl *reset_ctl); int (*rst_deassert)(struct reset_ctl *reset_ctl);
/**
* rst_status - Check reset signal status.
*
* @reset_ctl: The reset signal to check.
* @return 0 if deasserted, positive if asserted, or a negative
* error code.
*/
int (*rst_status)(struct reset_ctl *reset_ctl);
}; };
#endif #endif

14
include/reset.h
View file

@ -206,6 +206,15 @@ int reset_deassert(struct reset_ctl *reset_ctl);
*/ */
int reset_deassert_bulk(struct reset_ctl_bulk *bulk); int reset_deassert_bulk(struct reset_ctl_bulk *bulk);
/**
* rst_status - Check reset signal status.
*
* @reset_ctl: The reset signal to check.
* @return 0 if deasserted, positive if asserted, or a negative
* error code.
*/
int reset_status(struct reset_ctl *reset_ctl);
/** /**
* reset_release_all - Assert/Free an array of previously requested resets. * reset_release_all - Assert/Free an array of previously requested resets.
* *
@ -279,6 +288,11 @@ static inline int reset_deassert_bulk(struct reset_ctl_bulk *bulk)
return 0; return 0;
} }
static inline int reset_status(struct reset_ctl *reset_ctl)
{
return -ENOTSUPP;
}
static inline int reset_release_all(struct reset_ctl *reset_ctl, int count) static inline int reset_release_all(struct reset_ctl *reset_ctl, int count)
{ {
return 0; return 0;