diff options
Diffstat (limited to 'include/reset-uclass.h')
| -rw-r--r-- | include/reset-uclass.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/reset-uclass.h b/include/reset-uclass.h index 9a0696dd1e3..7af090b60b5 100644 --- a/include/reset-uclass.h +++ b/include/reset-uclass.h @@ -77,6 +77,25 @@ struct reset_ops { */ int (*rst_deassert)(struct reset_ctl *reset_ctl); /** + * rst_reset - Reset a HW module. + * + * This optional function triggers a reset pulse on the reset line. + * If not implemented, reset_reset() falls back to rst_assert(), + * udelay(@delay_us), then rst_deassert(); that delay is therefore + * observed only on the fallback path. + * + * When rst_reset is provided, @delay_us is controller-specific: the + * implementation should honour it if the hardware needs a minimum + * assertion time before release. It may ignore @delay_us when the + * pulse shape is fixed elsewhere (for example a firmware pulse). + * + * @reset_ctl: The reset signal to pulse. + * @delay_us: Minimum delay in microseconds between assert and + * deassert where applicable; see above. + * @return 0 if OK, or a negative error code. + */ + int (*rst_reset)(struct reset_ctl *reset_ctl, ulong delay_us); + /** * rst_status - Check reset signal status. * * @reset_ctl: The reset signal to check. |