From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lokesh Vutla Date: Tue, 21 Aug 2018 20:01:46 +0530 Subject: [U-Boot] [PATCH 08/25] dm: reset: Update uclass to allow querying reset status In-Reply-To: <20180821143203.29142-1-lokeshvutla@ti.com> References: <20180821143203.29142-1-lokeshvutla@ti.com> Message-ID: <20180821143203.29142-9-lokeshvutla@ti.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de From: Andreas Dannenberg Add a reset operations function pointer to support querying the current status of a reset control. Signed-off-by: Andreas Dannenberg Signed-off-by: Lokesh Vutla --- drivers/reset/reset-uclass.c | 9 +++++++++ include/reset-uclass.h | 8 ++++++++ include/reset.h | 14 ++++++++++++++ 3 files changed, 31 insertions(+) diff --git a/drivers/reset/reset-uclass.c b/drivers/reset/reset-uclass.c index 3899537635..89e39c6b5a 100644 --- a/drivers/reset/reset-uclass.c +++ b/drivers/reset/reset-uclass.c @@ -192,6 +192,15 @@ int reset_deassert_bulk(struct reset_ctl_bulk *bulk) 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 i, ret; diff --git a/include/reset-uclass.h b/include/reset-uclass.h index c17d738b31..7b5cc3cb3b 100644 --- a/include/reset-uclass.h +++ b/include/reset-uclass.h @@ -76,6 +76,14 @@ struct reset_ops { * @return 0 if OK, or a negative error code. */ 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 diff --git a/include/reset.h b/include/reset.h index a7bbc1c331..34ebb096dd 100644 --- a/include/reset.h +++ b/include/reset.h @@ -206,6 +206,15 @@ int reset_deassert(struct reset_ctl *reset_ctl); */ 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. * @@ -279,6 +288,11 @@ static inline int reset_deassert_bulk(struct reset_ctl_bulk *bulk) 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) { return 0; -- 2.18.0