Re: [PATCH RFC v6 1/6] dpll: spec: Add Netlink spec in YAML

Jiri Pirko
2023-03-14T14:44:25Z

Sun, Mar 12, 2023 at 03:28:02AM CET, vadfed@meta.com wrote:
>From: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
>
>Add a protocol spec for DPLL.
>Add code generated from the spec.
>
>Signed-off-by: Jakub Kicinski <kuba@kernel.org>
>Signed-off-by: Michal Michalik <michal.michalik@intel.com>
>Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
>Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
>---
> Documentation/netlink/specs/dpll.yaml | 514 ++++++++++++++++++++++++++
> drivers/dpll/dpll_nl.c | 126 +++++++
> drivers/dpll/dpll_nl.h | 42 +++
> include/uapi/linux/dpll.h | 196 ++++++++++
> 4 files changed, 878 insertions(+)
> create mode 100644 Documentation/netlink/specs/dpll.yaml
> create mode 100644 drivers/dpll/dpll_nl.c
> create mode 100644 drivers/dpll/dpll_nl.h
> create mode 100644 include/uapi/linux/dpll.h
>
>diff --git a/Documentation/netlink/specs/dpll.yaml b/Documentation/netlink/specs/dpll.yaml
>new file mode 100644
>index 000000000000..03e9f0e2d3d2
>--- /dev/null
>+++ b/Documentation/netlink/specs/dpll.yaml
>@@ -0,0 +1,514 @@
>+name: dpll
>+
>+doc: DPLL subsystem.
>+
>+definitions:
>+ -
>+ type: const
>+ name: temp-divider
>+ value: 10
>+ -
>+ type: const
>+ name: pin-freq-1-hz
>+ value: 1
>+ -
>+ type: const
>+ name: pin-freq-10-mhz
>+ value: 10000000
>+ -
>+ type: enum
>+ name: lock-status
>+ doc: |
>+ Provides information of dpll device lock status, valid values for
>+ DPLL_A_LOCK_STATUS attribute
>+ entries:
>+ -
>+ name: unspec
>+ doc: unspecified value
>+ -
>+ name: unlocked
>+ doc: |
>+ dpll was not yet locked to any valid (or is in one of modes:
>+ DPLL_MODE_FREERUN, DPLL_MODE_NCO)
>+ -
>+ name: calibrating
>+ doc: dpll is trying to lock to a valid signal
>+ -
>+ name: locked
>+ doc: dpll is locked
>+ -
>+ name: holdover
>+ doc: |
>+ dpll is in holdover state - lost a valid lock or was forced by
>+ selecting DPLL_MODE_HOLDOVER mode
>+ render-max: true
>+ -
>+ type: enum
>+ name: pin-type
>+ doc: Enumerates types of a pin, valid values for DPLL_A_PIN_TYPE attribute
>+ entries:
>+ -
>+ name: unspec
>+ doc: unspecified value
>+ -
>+ name: mux
>+ doc: aggregates another layer of selectable pins
>+ -
>+ name: ext
>+ doc: external source
>+ -
>+ name: synce-eth-port
>+ doc: ethernet port PHY's recovered clock
>+ -
>+ name: int-oscillator
>+ doc: device internal oscillator
>+ -
>+ name: gnss
>+ doc: GNSS recovered clock
>+ render-max: true
>+ -
>+ type: enum
>+ name: pin-state
>+ doc: available pin modes
>+ entries:
>+ -
>+ name: unspec
>+ doc: unspecified value
>+ -
>+ name: connected
>+ doc: pin connected
>+ -
>+ name: disconnected
>+ doc: pin disconnected
>+ render-max: true
>+ -
>+ type: enum
>+ name: pin-direction
>+ doc: available pin direction
>+ entries:
>+ -
>+ name: unspec
>+ doc: unspecified value
>+ -
>+ name: source
>+ doc: pin used as a source of a signal
>+ -
>+ name: output
>+ doc: pin used to output the signal
>+ render-max: true
>+ -
>+ type: enum
>+ name: mode

Could you please sort the enums so they are in the same order as the
attribute which carries them? That would also put the device and pin
enums together.

>+ doc: |
>+ working-modes a dpll can support, differentiate if and how dpll selects
>+ one of its sources to syntonize with it
>+ entries:
>+ -
>+ name: unspec
>+ doc: unspecified value
>+ -
>+ name: manual
>+ doc: source can be only selected by sending a request to dpll
>+ -
>+ name: automatic
>+ doc: highest prio, valid source, auto selected by dpll
>+ -
>+ name: holdover
>+ doc: dpll forced into holdover mode
>+ -
>+ name: freerun
>+ doc: dpll driven on system clk, no holdover available
>+ -
>+ name: nco
>+ doc: dpll driven by Numerically Controlled Oscillator
>+ render-max: true
>+ -
>+ type: enum
>+ name: type
>+ doc: type of dpll, valid values for DPLL_A_TYPE attribute
>+ entries:
>+ -
>+ name: unspec
>+ doc: unspecified value
>+ -
>+ name: pps
>+ doc: dpll produces Pulse-Per-Second signal
>+ -
>+ name: eec
>+ doc: dpll drives the Ethernet Equipment Clock
>+ render-max: true
>+ -
>+ type: enum
>+ name: event
>+ doc: events of dpll generic netlink family
>+ entries:
>+ -
>+ name: unspec
>+ doc: invalid event type
>+ -
>+ name: device-create
>+ doc: dpll device created
>+ -
>+ name: device-delete
>+ doc: dpll device deleted
>+ -
>+ name: device-change
>+ doc: |
>+ attribute of dpll device or pin changed, reason is to be found with
>+ an attribute type (DPLL_A_*) received with the event
>+ -
>+ type: flags
>+ name: pin-caps
>+ doc: define capabilities of a pin
>+ entries:
>+ -
>+ name: direction-can-change
>+ -
>+ name: priority-can-change
>+ -
>+ name: state-can-change
>+
>+
>+attribute-sets:
>+ -
>+ name: dpll
>+ enum-name: dplla
>+ attributes:
>+ -
>+ name: device
>+ type: nest
>+ value: 1
>+ multi-attr: true
>+ nested-attributes: device

What is this "device" and what is it good for? Smells like some leftover
and with the nested scheme looks quite odd.

>+ -
>+ name: id
>+ type: u32
>+ -
>+ name: dev-name
>+ type: string
>+ -
>+ name: bus-name
>+ type: string
>+ -
>+ name: mode
>+ type: u8
>+ enum: mode
>+ -
>+ name: mode-supported
>+ type: u8
>+ enum: mode
>+ multi-attr: true
>+ -
>+ name: source-pin-idx
>+ type: u32
>+ -
>+ name: lock-status
>+ type: u8
>+ enum: lock-status
>+ -
>+ name: temp

Could you put some comment regarding the divider here?

>+ type: s32
>+ -
>+ name: clock-id
>+ type: u64
>+ -
>+ name: type
>+ type: u8
>+ enum: type
>+ -
>+ name: pin
>+ type: nest
>+ multi-attr: true
>+ nested-attributes: pin
>+ value: 12
>+ -
>+ name: pin-idx
>+ type: u32
>+ -
>+ name: pin-description
>+ type: string
>+ -
>+ name: pin-type
>+ type: u8
>+ enum: pin-type
>+ -
>+ name: pin-direction
>+ type: u8
>+ enum: pin-direction
>+ -
>+ name: pin-frequency
>+ type: u32
>+ -
>+ name: pin-frequency-supported
>+ type: u32
>+ multi-attr: true
>+ -
>+ name: pin-any-frequency-min
>+ type: u32
>+ -
>+ name: pin-any-frequency-max
>+ type: u32

These 2 attrs somehow overlap with pin-frequency-supported,
which is a bit confusing, I think that pin-frequency-supported
should carry all supported frequencies. How about to have something
like:
name: pin-frequency-supported
type: nest
multi-attr: true
nested-attributes: pin-frequency-range

and then:
name: pin-frequency-range
subset-of: dpll
attributes:
-
name: pin-frequency-min
type: u32
-
name: pin-frequency-max
type: u32
doc: should be put only to specify range when value differs
from pin-frequency-min

That could carry list of frequencies and ranges, in this case multiple
ones if possibly needed.

>+ -
>+ name: pin-prio
>+ type: u32
>+ -
>+ name: pin-state
>+ type: u8
>+ enum: pin-state
>+ -
>+ name: pin-parent
>+ type: nest
>+ multi-attr: true
>+ nested-attributes: pin
>+ value: 23

Value 23? What's this?
You have it specified for some attrs all over the place.
What is the reason for it?

>+ -
>+ name: pin-parent-idx
>+ type: u32
>+ -
>+ name: pin-rclk-device
>+ type: string
>+ -
>+ name: pin-dpll-caps
>+ type: u32
>+ -
>+ name: device
>+ subset-of: dpll
>+ attributes:
>+ -
>+ name: id
>+ type: u32
>+ value: 2
>+ -
>+ name: dev-name
>+ type: string
>+ -
>+ name: bus-name
>+ type: string
>+ -
>+ name: mode
>+ type: u8
>+ enum: mode
>+ -
>+ name: mode-supported
>+ type: u8
>+ enum: mode
>+ multi-attr: true
>+ -
>+ name: source-pin-idx
>+ type: u32
>+ -
>+ name: lock-status
>+ type: u8
>+ enum: lock-status
>+ -
>+ name: temp
>+ type: s32
>+ -
>+ name: clock-id
>+ type: u64
>+ -
>+ name: type
>+ type: u8
>+ enum: type
>+ -
>+ name: pin
>+ type: nest
>+ value: 12
>+ multi-attr: true
>+ nested-attributes: pin

This does not belong here.

>+ -
>+ name: pin-prio
>+ type: u32
>+ value: 21
>+ -
>+ name: pin-state
>+ type: u8
>+ enum: pin-state
>+ -
>+ name: pin-dpll-caps
>+ type: u32
>+ value: 26

All these 3 do not belong here are well.

>+ -
>+ name: pin
>+ subset-of: dpll
>+ attributes:
>+ -
>+ name: device
>+ type: nest
>+ value: 1
>+ multi-attr: true
>+ nested-attributes: device
>+ -
>+ name: pin-idx
>+ type: u32
>+ value: 13
>+ -
>+ name: pin-description
>+ type: string
>+ -
>+ name: pin-type
>+ type: u8
>+ enum: pin-type
>+ -
>+ name: pin-direction
>+ type: u8
>+ enum: pin-direction
>+ -
>+ name: pin-frequency
>+ type: u32
>+ -
>+ name: pin-frequency-supported
>+ type: u32
>+ multi-attr: true
>+ -
>+ name: pin-any-frequency-min
>+ type: u32
>+ -
>+ name: pin-any-frequency-max
>+ type: u32
>+ -
>+ name: pin-prio
>+ type: u32
>+ -
>+ name: pin-state
>+ type: u8
>+ enum: pin-state
>+ -
>+ name: pin-parent
>+ type: nest
>+ multi-attr: true

Multiple parents? How is that supposed to work?

>+ nested-attributes: pin-parent
>+ value: 23
>+ -
>+ name: pin-rclk-device
>+ type: string
>+ value: 25
>+ -
>+ name: pin-dpll-caps
>+ type: u32

Missing "enum: "

>+ -
>+ name: pin-parent
>+ subset-of: dpll
>+ attributes:
>+ -
>+ name: pin-state
>+ type: u8
>+ value: 22
>+ enum: pin-state
>+ -
>+ name: pin-parent-idx
>+ type: u32
>+ value: 24
>+ -
>+ name: pin-rclk-device
>+ type: string

Yeah, as I wrote in the other email, this really smells to
have like a simple string like this. What is it supposed to be?

>+
>+
>+operations:
>+ list:
>+ -
>+ name: unspec
>+ doc: unused
>+
>+ -
>+ name: device-get
>+ doc: |
>+ Get list of DPLL devices (dump) or attributes of a single dpll device
>+ attribute-set: dpll

Shouldn't this be "device"?

>+ flags: [ admin-perm ]
>+
>+ do:
>+ pre: dpll-pre-doit
>+ post: dpll-post-doit
>+ request:
>+ attributes:
>+ - id
>+ - bus-name
>+ - dev-name
>+ reply:
>+ attributes:
>+ - device
>+
>+ dump:
>+ pre: dpll-pre-dumpit
>+ post: dpll-post-dumpit
>+ reply:
>+ attributes:
>+ - device
>+
>+ -
>+ name: device-set
>+ doc: Set attributes for a DPLL device
>+ attribute-set: dpll

"device" here as well?

>+ flags: [ admin-perm ]
>+
>+ do:
>+ pre: dpll-pre-doit
>+ post: dpll-post-doit
>+ request:
>+ attributes:
>+ - id
>+ - bus-name
>+ - dev-name
>+ - mode

Hmm, shouldn't source-pin-index be here as well?

>+
>+ -
>+ name: pin-get
>+ doc: |
>+ Get list of pins and its attributes.
>+ - dump request without any attributes given - list all the pins in the system
>+ - dump request with target dpll - list all the pins registered with a given dpll device
>+ - do request with target dpll and target pin - single pin attributes
>+ attribute-set: dpll

"pin"?

>+ flags: [ admin-perm ]
>+
>+ do:
>+ pre: dpll-pin-pre-doit
>+ post: dpll-pin-post-doit
>+ request:
>+ attributes:
>+ - id
>+ - bus-name
>+ - dev-name
>+ - pin-idx
>+ reply:
>+ attributes:
>+ - pin
>+
>+ dump:
>+ pre: dpll-pin-pre-dumpit
>+ post: dpll-pin-post-dumpit
>+ request:
>+ attributes:
>+ - id
>+ - bus-name
>+ - dev-name
>+ reply:
>+ attributes:
>+ - pin
>+
>+ -
>+ name: pin-set
>+ doc: Set attributes of a target pin
>+ attribute-set: dpll

"pin"?

>+ flags: [ admin-perm ]
>+
>+ do:
>+ pre: dpll-pin-pre-doit
>+ post: dpll-pin-post-doit
>+ request:
>+ attributes:
>+ - id
>+ - bus-name
>+ - dev-name
>+ - pin-idx
>+ - pin-frequency
>+ - pin-direction
>+ - pin-prio
>+ - pin-parent-idx
>+ - pin-state
>+
>+mcast-groups:
>+ list:
>+ -
>+ name: monitor
>diff --git a/drivers/dpll/dpll_nl.c b/drivers/dpll/dpll_nl.c
>new file mode 100644
>index 000000000000..099d1e30ca7c
>--- /dev/null
>+++ b/drivers/dpll/dpll_nl.c
>@@ -0,0 +1,126 @@
>+// SPDX-License-Identifier: BSD-3-Clause
>+/* Do not edit directly, auto-generated from: */
>+/* Documentation/netlink/specs/dpll.yaml */
>+/* YNL-GEN kernel source */
>+
>+#include <net/netlink.h>
>+#include <net/genetlink.h>
>+
>+#include "dpll_nl.h"
>+
>+#include <linux/dpll.h>
>+
>+/* DPLL_CMD_DEVICE_GET - do */
>+static const struct nla_policy dpll_device_get_nl_policy[DPLL_A_BUS_NAME + 1] = {
>+ [DPLL_A_ID] = { .type = NLA_U32, },
>+ [DPLL_A_BUS_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_DEV_NAME] = { .type = NLA_NUL_STRING, },
>+};
>+
>+/* DPLL_CMD_DEVICE_SET - do */
>+static const struct nla_policy dpll_device_set_nl_policy[DPLL_A_MODE + 1] = {
>+ [DPLL_A_ID] = { .type = NLA_U32, },
>+ [DPLL_A_BUS_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_DEV_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_MODE] = NLA_POLICY_MAX(NLA_U8, 5),

Hmm, any idea why the generator does not put define name
here instead of "5"?

>+};
>+
>+/* DPLL_CMD_PIN_GET - do */
>+static const struct nla_policy dpll_pin_get_do_nl_policy[DPLL_A_PIN_IDX + 1] = {
>+ [DPLL_A_ID] = { .type = NLA_U32, },
>+ [DPLL_A_BUS_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_DEV_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_PIN_IDX] = { .type = NLA_U32, },
>+};
>+
>+/* DPLL_CMD_PIN_GET - dump */
>+static const struct nla_policy dpll_pin_get_dump_nl_policy[DPLL_A_BUS_NAME + 1] = {
>+ [DPLL_A_ID] = { .type = NLA_U32, },
>+ [DPLL_A_BUS_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_DEV_NAME] = { .type = NLA_NUL_STRING, },
>+};
>+
>+/* DPLL_CMD_PIN_SET - do */
>+static const struct nla_policy dpll_pin_set_nl_policy[DPLL_A_PIN_PARENT_IDX + 1] = {
>+ [DPLL_A_ID] = { .type = NLA_U32, },
>+ [DPLL_A_BUS_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_DEV_NAME] = { .type = NLA_NUL_STRING, },
>+ [DPLL_A_PIN_IDX] = { .type = NLA_U32, },
>+ [DPLL_A_PIN_FREQUENCY] = { .type = NLA_U32, },

4.3GHz would be the limit, isn't it future proof to make this rather u64?

>+ [DPLL_A_PIN_DIRECTION] = NLA_POLICY_MAX(NLA_U8, 2),
>+ [DPLL_A_PIN_PRIO] = { .type = NLA_U32, },
>+ [DPLL_A_PIN_PARENT_IDX] = { .type = NLA_U32, },

This is a bit odd. The size is DPLL_A_PIN_PARENT_IDX + 1, yet PIN_STATE
is last. I found that the order is not according to the enum in the yaml
operation definition. Perhaps the generator can sort this?

>+ [DPLL_A_PIN_STATE] = NLA_POLICY_MAX(NLA_U8, 2),
>+};
>+
>+/* Ops table for dpll */
>+static const struct genl_split_ops dpll_nl_ops[6] = {
>+ {
>+ .cmd = DPLL_CMD_DEVICE_GET,
>+ .pre_doit = dpll_pre_doit,
>+ .doit = dpll_nl_device_get_doit,
>+ .post_doit = dpll_post_doit,
>+ .policy = dpll_device_get_nl_policy,
>+ .maxattr = DPLL_A_BUS_NAME,
>+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
>+ },
>+ {
>+ .cmd = DPLL_CMD_DEVICE_GET,
>+ .start = dpll_pre_dumpit,
>+ .dumpit = dpll_nl_device_get_dumpit,
>+ .done = dpll_post_dumpit,
>+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
>+ },
>+ {
>+ .cmd = DPLL_CMD_DEVICE_SET,
>+ .pre_doit = dpll_pre_doit,
>+ .doit = dpll_nl_device_set_doit,
>+ .post_doit = dpll_post_doit,
>+ .policy = dpll_device_set_nl_policy,
>+ .maxattr = DPLL_A_MODE,
>+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
>+ },
>+ {
>+ .cmd = DPLL_CMD_PIN_GET,
>+ .pre_doit = dpll_pin_pre_doit,
>+ .doit = dpll_nl_pin_get_doit,
>+ .post_doit = dpll_pin_post_doit,
>+ .policy = dpll_pin_get_do_nl_policy,
>+ .maxattr = DPLL_A_PIN_IDX,
>+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
>+ },
>+ {
>+ .cmd = DPLL_CMD_PIN_GET,
>+ .start = dpll_pin_pre_dumpit,
>+ .dumpit = dpll_nl_pin_get_dumpit,
>+ .done = dpll_pin_post_dumpit,
>+ .policy = dpll_pin_get_dump_nl_policy,
>+ .maxattr = DPLL_A_BUS_NAME,
>+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DUMP,
>+ },
>+ {
>+ .cmd = DPLL_CMD_PIN_SET,
>+ .pre_doit = dpll_pin_pre_doit,
>+ .doit = dpll_nl_pin_set_doit,
>+ .post_doit = dpll_pin_post_doit,
>+ .policy = dpll_pin_set_nl_policy,
>+ .maxattr = DPLL_A_PIN_PARENT_IDX,
>+ .flags = GENL_ADMIN_PERM | GENL_CMD_CAP_DO,
>+ },
>+};
>+
>+static const struct genl_multicast_group dpll_nl_mcgrps[] = {
>+ [DPLL_NLGRP_MONITOR] = { "monitor", },
>+};
>+
>+struct genl_family dpll_nl_family __ro_after_init = {
>+ .name = DPLL_FAMILY_NAME,
>+ .version = DPLL_FAMILY_VERSION,
>+ .netnsok = true,
>+ .parallel_ops = true,
>+ .module = THIS_MODULE,
>+ .split_ops = dpll_nl_ops,
>+ .n_split_ops = ARRAY_SIZE(dpll_nl_ops),
>+ .mcgrps = dpll_nl_mcgrps,
>+ .n_mcgrps = ARRAY_SIZE(dpll_nl_mcgrps),
>+};
>diff --git a/drivers/dpll/dpll_nl.h b/drivers/dpll/dpll_nl.h
>new file mode 100644
>index 000000000000..3a354dfb9a31
>--- /dev/null
>+++ b/drivers/dpll/dpll_nl.h
>@@ -0,0 +1,42 @@
>+/* SPDX-License-Identifier: BSD-3-Clause */
>+/* Do not edit directly, auto-generated from: */
>+/* Documentation/netlink/specs/dpll.yaml */
>+/* YNL-GEN kernel header */
>+
>+#ifndef _LINUX_DPLL_GEN_H
>+#define _LINUX_DPLL_GEN_H
>+
>+#include <net/netlink.h>
>+#include <net/genetlink.h>
>+
>+#include <linux/dpll.h>
>+
>+int dpll_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
>+ struct genl_info *info);
>+int dpll_pin_pre_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
>+ struct genl_info *info);
>+void
>+dpll_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
>+ struct genl_info *info);
>+void
>+dpll_pin_post_doit(const struct genl_split_ops *ops, struct sk_buff *skb,
>+ struct genl_info *info);
>+int dpll_pre_dumpit(struct netlink_callback *cb);
>+int dpll_pin_pre_dumpit(struct netlink_callback *cb);
>+int dpll_post_dumpit(struct netlink_callback *cb);
>+int dpll_pin_post_dumpit(struct netlink_callback *cb);
>+
>+int dpll_nl_device_get_doit(struct sk_buff *skb, struct genl_info *info);
>+int dpll_nl_device_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
>+int dpll_nl_device_set_doit(struct sk_buff *skb, struct genl_info *info);
>+int dpll_nl_pin_get_doit(struct sk_buff *skb, struct genl_info *info);
>+int dpll_nl_pin_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb);
>+int dpll_nl_pin_set_doit(struct sk_buff *skb, struct genl_info *info);
>+
>+enum {
>+ DPLL_NLGRP_MONITOR,
>+};
>+
>+extern struct genl_family dpll_nl_family;
>+
>+#endif /* _LINUX_DPLL_GEN_H */
>diff --git a/include/uapi/linux/dpll.h b/include/uapi/linux/dpll.h
>new file mode 100644
>index 000000000000..ece6fe685d08
>--- /dev/null
>+++ b/include/uapi/linux/dpll.h
>@@ -0,0 +1,196 @@
>+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
>+/* Do not edit directly, auto-generated from: */
>+/* Documentation/netlink/specs/dpll.yaml */
>+/* YNL-GEN uapi header */
>+
>+#ifndef _UAPI_LINUX_DPLL_H
>+#define _UAPI_LINUX_DPLL_H
>+
>+#define DPLL_FAMILY_NAME "dpll"
>+#define DPLL_FAMILY_VERSION 1
>+
>+#define DPLL_TEMP_DIVIDER 10

Some comment to this define would be nice.

>+#define DPLL_PIN_FREQ_1_HZ 1
>+#define DPLL_PIN_FREQ_10_MHZ 10000000

Have this as enum. Spell out "frequency" to be consistent with the
related attribute name.

>+
>+/**
>+ * enum dpll_lock_status - Provides information of dpll device lock status,
>+ * valid values for DPLL_A_LOCK_STATUS attribute
>+ * @DPLL_LOCK_STATUS_UNSPEC: unspecified value
>+ * @DPLL_LOCK_STATUS_UNLOCKED: dpll was not yet locked to any valid (or is in

"any valid source" perhaps?

>+ * one of modes: DPLL_MODE_FREERUN, DPLL_MODE_NCO)
>+ * @DPLL_LOCK_STATUS_CALIBRATING: dpll is trying to lock to a valid signal
>+ * @DPLL_LOCK_STATUS_LOCKED: dpll is locked
>+ * @DPLL_LOCK_STATUS_HOLDOVER: dpll is in holdover state - lost a valid lock or
>+ * was forced by selecting DPLL_MODE_HOLDOVER mode
>+ */
>+enum dpll_lock_status {
>+ DPLL_LOCK_STATUS_UNSPEC,
>+ DPLL_LOCK_STATUS_UNLOCKED,
>+ DPLL_LOCK_STATUS_CALIBRATING,
>+ DPLL_LOCK_STATUS_LOCKED,
>+ DPLL_LOCK_STATUS_HOLDOVER,
>+
>+ __DPLL_LOCK_STATUS_MAX,
>+ DPLL_LOCK_STATUS_MAX = (__DPLL_LOCK_STATUS_MAX - 1)
>+};
>+
>+/**
>+ * enum dpll_pin_type - Enumerates types of a pin, valid values for
>+ * DPLL_A_PIN_TYPE attribute
>+ * @DPLL_PIN_TYPE_UNSPEC: unspecified value
>+ * @DPLL_PIN_TYPE_MUX: aggregates another layer of selectable pins
>+ * @DPLL_PIN_TYPE_EXT: external source
>+ * @DPLL_PIN_TYPE_SYNCE_ETH_PORT: ethernet port PHY's recovered clock
>+ * @DPLL_PIN_TYPE_INT_OSCILLATOR: device internal oscillator
>+ * @DPLL_PIN_TYPE_GNSS: GNSS recovered clock
>+ */
>+enum dpll_pin_type {
>+ DPLL_PIN_TYPE_UNSPEC,
>+ DPLL_PIN_TYPE_MUX,
>+ DPLL_PIN_TYPE_EXT,
>+ DPLL_PIN_TYPE_SYNCE_ETH_PORT,
>+ DPLL_PIN_TYPE_INT_OSCILLATOR,
>+ DPLL_PIN_TYPE_GNSS,
>+
>+ __DPLL_PIN_TYPE_MAX,
>+ DPLL_PIN_TYPE_MAX = (__DPLL_PIN_TYPE_MAX - 1)
>+};
>+
>+/**
>+ * enum dpll_pin_state - available pin modes

For some of the enums, you say for what attribute it serves as a value
set, for some you don't. Please unify the approach. I think it is
valuable to say that for every enum.

>+ * @DPLL_PIN_STATE_UNSPEC: unspecified value
>+ * @DPLL_PIN_STATE_CONNECTED: pin connected
>+ * @DPLL_PIN_STATE_DISCONNECTED: pin disconnected
>+ */
>+enum dpll_pin_state {
>+ DPLL_PIN_STATE_UNSPEC,
>+ DPLL_PIN_STATE_CONNECTED,
>+ DPLL_PIN_STATE_DISCONNECTED,
>+
>+ __DPLL_PIN_STATE_MAX,
>+ DPLL_PIN_STATE_MAX = (__DPLL_PIN_STATE_MAX - 1)
>+};
>+
>+/**
>+ * enum dpll_pin_direction - available pin direction
>+ * @DPLL_PIN_DIRECTION_UNSPEC: unspecified value
>+ * @DPLL_PIN_DIRECTION_SOURCE: pin used as a source of a signal
>+ * @DPLL_PIN_DIRECTION_OUTPUT: pin used to output the signal
>+ */
>+enum dpll_pin_direction {
>+ DPLL_PIN_DIRECTION_UNSPEC,
>+ DPLL_PIN_DIRECTION_SOURCE,
>+ DPLL_PIN_DIRECTION_OUTPUT,
>+
>+ __DPLL_PIN_DIRECTION_MAX,
>+ DPLL_PIN_DIRECTION_MAX = (__DPLL_PIN_DIRECTION_MAX - 1)
>+};
>+
>+/**
>+ * enum dpll_mode - working-modes a dpll can support, differentiate if and how
>+ * dpll selects one of its sources to syntonize with it
>+ * @DPLL_MODE_UNSPEC: unspecified value
>+ * @DPLL_MODE_MANUAL: source can be only selected by sending a request to dpll
>+ * @DPLL_MODE_AUTOMATIC: highest prio, valid source, auto selected by dpll
>+ * @DPLL_MODE_HOLDOVER: dpll forced into holdover mode
>+ * @DPLL_MODE_FREERUN: dpll driven on system clk, no holdover available
>+ * @DPLL_MODE_NCO: dpll driven by Numerically Controlled Oscillator
>+ */
>+enum dpll_mode {
>+ DPLL_MODE_UNSPEC,
>+ DPLL_MODE_MANUAL,
>+ DPLL_MODE_AUTOMATIC,
>+ DPLL_MODE_HOLDOVER,
>+ DPLL_MODE_FREERUN,
>+ DPLL_MODE_NCO,
>+
>+ __DPLL_MODE_MAX,
>+ DPLL_MODE_MAX = (__DPLL_MODE_MAX - 1)
>+};
>+
>+/**
>+ * enum dpll_type - type of dpll, valid values for DPLL_A_TYPE attribute
>+ * @DPLL_TYPE_UNSPEC: unspecified value
>+ * @DPLL_TYPE_PPS: dpll produces Pulse-Per-Second signal
>+ * @DPLL_TYPE_EEC: dpll drives the Ethernet Equipment Clock
>+ */
>+enum dpll_type {
>+ DPLL_TYPE_UNSPEC,
>+ DPLL_TYPE_PPS,
>+ DPLL_TYPE_EEC,
>+
>+ __DPLL_TYPE_MAX,
>+ DPLL_TYPE_MAX = (__DPLL_TYPE_MAX - 1)
>+};
>+
>+/**
>+ * enum dpll_event - events of dpll generic netlink family
>+ * @DPLL_EVENT_UNSPEC: invalid event type
>+ * @DPLL_EVENT_DEVICE_CREATE: dpll device created
>+ * @DPLL_EVENT_DEVICE_DELETE: dpll device deleted
>+ * @DPLL_EVENT_DEVICE_CHANGE: attribute of dpll device or pin changed, reason
>+ * is to be found with an attribute type (DPLL_A_*) received with the event
>+ */
>+enum dpll_event {
>+ DPLL_EVENT_UNSPEC,
>+ DPLL_EVENT_DEVICE_CREATE,
>+ DPLL_EVENT_DEVICE_DELETE,
>+ DPLL_EVENT_DEVICE_CHANGE,
>+};
>+
>+/**
>+ * enum dpll_pin_caps - define capabilities of a pin
>+ */
>+enum dpll_pin_caps {
>+ DPLL_PIN_CAPS_DIRECTION_CAN_CHANGE = 1,
>+ DPLL_PIN_CAPS_PRIORITY_CAN_CHANGE = 2,
>+ DPLL_PIN_CAPS_STATE_CAN_CHANGE = 4,
>+};
>+
>+enum dplla {
>+ DPLL_A_DEVICE = 1,
>+ DPLL_A_ID,
>+ DPLL_A_DEV_NAME,
>+ DPLL_A_BUS_NAME,
>+ DPLL_A_MODE,
>+ DPLL_A_MODE_SUPPORTED,
>+ DPLL_A_SOURCE_PIN_IDX,
>+ DPLL_A_LOCK_STATUS,
>+ DPLL_A_TEMP,
>+ DPLL_A_CLOCK_ID,
>+ DPLL_A_TYPE,
>+ DPLL_A_PIN,
>+ DPLL_A_PIN_IDX,
>+ DPLL_A_PIN_DESCRIPTION,

I commented this name in the other email. This does not describe
anything. It is a label on a connector, isn't it? Why don't to call it
"label"?

>+ DPLL_A_PIN_TYPE,
>+ DPLL_A_PIN_DIRECTION,
>+ DPLL_A_PIN_FREQUENCY,
>+ DPLL_A_PIN_FREQUENCY_SUPPORTED,
>+ DPLL_A_PIN_ANY_FREQUENCY_MIN,
>+ DPLL_A_PIN_ANY_FREQUENCY_MAX,

Drop "any". Not good for anything.

>+ DPLL_A_PIN_PRIO,
>+ DPLL_A_PIN_STATE,
>+ DPLL_A_PIN_PARENT,
>+ DPLL_A_PIN_PARENT_IDX,
>+ DPLL_A_PIN_RCLK_DEVICE,
>+ DPLL_A_PIN_DPLL_CAPS,

Just DPLL_A_PIN_CAPS is enough, that would be also consistent with the
enum name.

>+
>+ __DPLL_A_MAX,
>+ DPLL_A_MAX = (__DPLL_A_MAX - 1)
>+};
>+
>+enum {
>+ DPLL_CMD_UNSPEC,
>+ DPLL_CMD_DEVICE_GET,
>+ DPLL_CMD_DEVICE_SET,
>+ DPLL_CMD_PIN_GET,
>+ DPLL_CMD_PIN_SET,
>+
>+ __DPLL_CMD_MAX,
>+ DPLL_CMD_MAX = (__DPLL_CMD_MAX - 1)
>+};
>+
>+#define DPLL_MCGRP_MONITOR "monitor"
>+
>+#endif /* _UAPI_LINUX_DPLL_H */
>--
>2.34.1
>