From: Cristian Marussi <cristian.marussi@arm.com> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, peter.hilber@opensynergy.com, igor.skalkin@opensynergy.com, cristian.marussi@arm.com Subject: [PATCH v2 8/9] [RFC] firmware: arm_scmi: Add support for clock_enable_latency Date: Tue, 1 Feb 2022 17:16:00 +0000 [thread overview] Message-ID: <20220201171601.53316-9-cristian.marussi@arm.com> (raw) In-Reply-To: <20220201171601.53316-1-cristian.marussi@arm.com> An SCMI platform can optionally advertise an enable latency typically associated with a specific clock resource: add support for parsing such optional message field and export such information in the usual publicly accessible clock descriptor. Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- RFC tag is due to the fact that this SCMI spec Clock protocol field addition is still to be published. v1 --> v2 - moved enable_latency flag definition from the previous commit --- drivers/firmware/arm_scmi/clock.c | 12 +++++++++--- include/linux/scmi_protocol.h | 1 + 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 72f930c0e3e2..552610bfb91e 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -27,7 +27,8 @@ struct scmi_msg_resp_clock_protocol_attributes { struct scmi_msg_resp_clock_attributes { __le32 attributes; #define CLOCK_ENABLE BIT(0) - u8 name[SCMI_MAX_STR_SIZE]; + u8 name[SCMI_MAX_STR_SIZE]; + __le32 clock_enable_latency; }; struct scmi_clock_set_config { @@ -116,10 +117,15 @@ static int scmi_clock_attributes_get(const struct scmi_protocol_handle *ph, attr = t->rx.buf; ret = ph->xops->do_xfer(ph, t); - if (!ret) + if (!ret) { strlcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE); - else + /* TODO Use CLOCK Proto Versioning once SCMI spec is updated */ + if (t->rx.len > sizeof(attr->attributes) + SCMI_MAX_STR_SIZE) + clk->enable_latency = + le32_to_cpu(attr->clock_enable_latency); + } else { clk->name[0] = '\0'; + } ph->xops->xfer_put(ph, t); return ret; diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 306e576835f8..b87551f41f9f 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -42,6 +42,7 @@ struct scmi_revision_info { struct scmi_clock_info { char name[SCMI_MAX_STR_SIZE]; + unsigned int enable_latency; bool rate_discrete; union { struct { -- 2.17.1
WARNING: multiple messages have this Message-ID (diff)
From: Cristian Marussi <cristian.marussi@arm.com> To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com, Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com, etienne.carriere@linaro.org, vincent.guittot@linaro.org, souvik.chakravarty@arm.com, peter.hilber@opensynergy.com, igor.skalkin@opensynergy.com, cristian.marussi@arm.com Subject: [PATCH v2 8/9] [RFC] firmware: arm_scmi: Add support for clock_enable_latency Date: Tue, 1 Feb 2022 17:16:00 +0000 [thread overview] Message-ID: <20220201171601.53316-9-cristian.marussi@arm.com> (raw) In-Reply-To: <20220201171601.53316-1-cristian.marussi@arm.com> An SCMI platform can optionally advertise an enable latency typically associated with a specific clock resource: add support for parsing such optional message field and export such information in the usual publicly accessible clock descriptor. Signed-off-by: Cristian Marussi <cristian.marussi@arm.com> --- RFC tag is due to the fact that this SCMI spec Clock protocol field addition is still to be published. v1 --> v2 - moved enable_latency flag definition from the previous commit --- drivers/firmware/arm_scmi/clock.c | 12 +++++++++--- include/linux/scmi_protocol.h | 1 + 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/firmware/arm_scmi/clock.c b/drivers/firmware/arm_scmi/clock.c index 72f930c0e3e2..552610bfb91e 100644 --- a/drivers/firmware/arm_scmi/clock.c +++ b/drivers/firmware/arm_scmi/clock.c @@ -27,7 +27,8 @@ struct scmi_msg_resp_clock_protocol_attributes { struct scmi_msg_resp_clock_attributes { __le32 attributes; #define CLOCK_ENABLE BIT(0) - u8 name[SCMI_MAX_STR_SIZE]; + u8 name[SCMI_MAX_STR_SIZE]; + __le32 clock_enable_latency; }; struct scmi_clock_set_config { @@ -116,10 +117,15 @@ static int scmi_clock_attributes_get(const struct scmi_protocol_handle *ph, attr = t->rx.buf; ret = ph->xops->do_xfer(ph, t); - if (!ret) + if (!ret) { strlcpy(clk->name, attr->name, SCMI_MAX_STR_SIZE); - else + /* TODO Use CLOCK Proto Versioning once SCMI spec is updated */ + if (t->rx.len > sizeof(attr->attributes) + SCMI_MAX_STR_SIZE) + clk->enable_latency = + le32_to_cpu(attr->clock_enable_latency); + } else { clk->name[0] = '\0'; + } ph->xops->xfer_put(ph, t); return ret; diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h index 306e576835f8..b87551f41f9f 100644 --- a/include/linux/scmi_protocol.h +++ b/include/linux/scmi_protocol.h @@ -42,6 +42,7 @@ struct scmi_revision_info { struct scmi_clock_info { char name[SCMI_MAX_STR_SIZE]; + unsigned int enable_latency; bool rate_discrete; union { struct { -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2022-02-01 17:16 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-02-01 17:15 [PATCH 0/9] Add SCMI Virtio & Clock atomic support Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 1/9] firmware: arm_scmi: Add a virtio channel refcount Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 22:05 ` Michael S. Tsirkin 2022-02-01 22:05 ` Michael S. Tsirkin 2022-02-03 10:08 ` Cristian Marussi 2022-02-03 10:08 ` Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 2/9] firmware: arm_scmi: Review virtio free_list handling Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 3/9] [RFC] virtio_ring: Embed a wrap counter in opaque poll index value Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 18:27 ` Michael S. Tsirkin 2022-02-01 18:27 ` Michael S. Tsirkin 2022-02-01 18:27 ` Michael S. Tsirkin 2022-02-03 10:51 ` Cristian Marussi 2022-02-03 10:51 ` Cristian Marussi 2022-02-03 11:32 ` Michael S. Tsirkin 2022-02-03 11:32 ` Michael S. Tsirkin 2022-02-03 11:32 ` Michael S. Tsirkin 2022-02-07 18:52 ` Cristian Marussi 2022-02-07 18:52 ` Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 4/9] firmware: arm_scmi: Add atomic mode support to virtio transport Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 5/9] dt-bindings: firmware: arm,scmi: Add atomic_threshold optional property Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 5/9] dt-bindings: firmware: arm, scmi: " Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 6/9] firmware: arm_scmi: Support optional system wide atomic_threshold Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 17:15 ` [PATCH v2 7/9] firmware: arm_scmi: Add atomic support to clock protocol Cristian Marussi 2022-02-01 17:15 ` Cristian Marussi 2022-02-01 17:16 ` Cristian Marussi [this message] 2022-02-01 17:16 ` [PATCH v2 8/9] [RFC] firmware: arm_scmi: Add support for clock_enable_latency Cristian Marussi 2022-02-01 17:16 ` [PATCH v2 9/9] [RFC] clk: scmi: Support atomic clock enable/disable API Cristian Marussi 2022-02-01 17:16 ` Cristian Marussi
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