From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC22C395D8B for ; Tue, 28 Apr 2026 15:21:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777389691; cv=none; b=UpsDhe/P8F5Q6aIGYxHwkgG35IfapBUNlf0rJy7a2QVguqkpo8Hg24DjCnkVEscks20CngR2lekXZlQNfIafhQOaXZg5bODfp/T0nr6vQPZEOrLe4nmQdeFb987cXIAmLhXMdM0e00w0b7tMLdgSLdZeSXuNKcREevQscKUeUwY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777389691; c=relaxed/simple; bh=ouyM7NMwaC73seyX5OtU4PkMzWA7HJQj271PXbXZhZw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pe905EboZQQLkPTwmmhKqk1yiB8I4vxnl/545293lgK+/zrdMAAtyuclBp5zAPyPaZyiGlup6waLf+cap7qh+KwM/m8RsPnJ4HhDiyn1fmzAySifHu4YndFcwcBHXig3aApp3Gjmgat1zqBmRxwh1yy89Ebp1Qcrefp2RKf3cv0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=MbctiBo/; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="MbctiBo/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1777389688; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LngOVqkgAQYIYscWAk3WuyZjE2QNDFJUpv4XnHa99Xk=; b=MbctiBo/6qjk2h87OJ+ZspJC0knZtHOhNtOu3JzMMpH4r3U+Roh51P9yCs07q54GWZmbFP ksZyTUJ2xdGvkmJ7DZMxsSWHfPqiLG0WTLPnIiQaYqI4BuH1pMRtbSu6Rfha2jYxkdgYzN OEyjnHLcCzTs7DQ99n2hrSf4tWkeuBA= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-691-V32rblDONQiZZfcLnHzTBw-1; Tue, 28 Apr 2026 11:21:24 -0400 X-MC-Unique: V32rblDONQiZZfcLnHzTBw-1 X-Mimecast-MFC-AGG-ID: V32rblDONQiZZfcLnHzTBw_1777389683 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5D36F195608F; Tue, 28 Apr 2026 15:21:23 +0000 (UTC) Received: from p16v.redhat.com (unknown [10.44.49.234]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A0D8C195608E; Tue, 28 Apr 2026 15:21:21 +0000 (UTC) From: Ivan Vecera To: netdev@vger.kernel.org Cc: David Ahern , Stephen Hemminger , Petr Oros Subject: [PATCH iproute2-next 2/2] dpll: add frequency monitoring support Date: Tue, 28 Apr 2026 17:21:15 +0200 Message-ID: <20260428152115.2815860-3-ivecera@redhat.com> In-Reply-To: <20260428152115.2815860-1-ivecera@redhat.com> References: <20260428152115.2815860-1-ivecera@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Add support for the new frequency monitoring feature from the kernel patch series "dpll: add actual frequency monitoring feature". This includes: - DPLL_A_FREQUENCY_MONITOR device attribute (enable/disable) - DPLL_A_PIN_MEASURED_FREQUENCY pin attribute displayed as fractional Hz using DPLL_PR_MEASURED_FREQUENCY macro (kernel reports in mHz) - device set: frequency-monitor { enable | disable } - Refactor phase-offset-monitor to use new dpll_parse_attr_feature_state helper shared with frequency-monitor - Update man page and bash-completion Signed-off-by: Ivan Vecera --- bash-completion/dpll | 4 +-- dpll/dpll.c | 62 ++++++++++++++++++++++++++++++++++---------- man/man8/dpll.8 | 19 ++++++++++++-- 3 files changed, 68 insertions(+), 17 deletions(-) diff --git a/bash-completion/dpll b/bash-completion/dpll index 542b99c2fce2..7ddcf529d429 100644 --- a/bash-completion/dpll +++ b/bash-completion/dpll @@ -100,7 +100,7 @@ _dpll_device() COMPREPLY=( $( compgen -W "automatic manual" -- "$cur" ) ) return 0 ;; - phase-offset-monitor) + phase-offset-monitor|frequency-monitor) COMPREPLY=( $( compgen -W "enable disable true false 0 1" -- "$cur" ) ) return 0 ;; @@ -110,7 +110,7 @@ _dpll_device() ;; *) COMPREPLY=( $( compgen -W "id mode phase-offset-monitor \ - phase-offset-avg-factor" -- "$cur" ) ) + phase-offset-avg-factor frequency-monitor" -- "$cur" ) ) return 0 ;; esac diff --git a/dpll/dpll.c b/dpll/dpll.c index e8056ff6a24b..6d8c0cbb8a34 100644 --- a/dpll/dpll.c +++ b/dpll/dpll.c @@ -313,6 +313,26 @@ static int dpll_parse_attr_str(struct dpll *dpll, struct nlmsghdr *nlh, return 0; } +static int dpll_parse_attr_feature_state(struct dpll *dpll, + struct nlmsghdr *nlh, + const char *arg_name, int attr_id) +{ + const char *str = dpll_argv_next(dpll); + bool val; + + if (!str) { + pr_err("%s requires an argument\n", arg_name); + return -EINVAL; + } + if (str_to_bool(str, &val)) { + pr_err("invalid %s value: %s (use enable/disable)\n", + arg_name, str); + return -EINVAL; + } + mnl_attr_put_u32(nlh, attr_id, val ? 1 : 0); + return 0; +} + static int dpll_parse_attr_enum(struct dpll *dpll, struct nlmsghdr *nlh, const char *arg_name, int attr_id, int (*parse_func)(struct dpll *, __u32 *)) @@ -425,6 +445,21 @@ static __s64 mnl_attr_get_sint(const struct nlattr *attr) } \ } while (0) +/* Measured frequency - JSON prints raw mHz value, FP prints fractional Hz */ +#define DPLL_PR_MEASURED_FREQUENCY(tb, attr_id) \ + do { \ + if (tb[attr_id]) { \ + __u64 val = mnl_attr_get_u64(tb[attr_id]); \ + lldiv_t d = lldiv(val, \ + DPLL_PIN_MEASURED_FREQUENCY_DIVIDER); \ + print_lluint(PRINT_JSON, "measured-frequency", \ + NULL, val); \ + print_s64(PRINT_FP, NULL, \ + " measured-frequency: %lld.", d.quot); \ + print_s64(PRINT_FP, NULL, "%03lld Hz\n", d.rem); \ + } \ + } while (0) + /* Generic version with custom format */ #define DPLL_PR_ENUM_STR_FMT(tb, attr_id, name, format_str, name_func) \ do { \ @@ -657,6 +692,7 @@ static void cmd_device_help(void) pr_err(" dpll device set id DEVICE_ID [ mode { automatic | manual } ]\n"); pr_err(" [ phase-offset-monitor { enable | disable } ]\n"); pr_err(" [ phase-offset-avg-factor NUM ]\n"); + pr_err(" [ frequency-monitor { enable | disable } ]\n"); pr_err(" dpll device id-get [ module-name NAME ] [ clock-id ID ] [ type TYPE ]\n"); } @@ -1058,6 +1094,10 @@ static void dpll_device_print_attrs(const struct nlmsghdr *nlh, str_enable_disable); DPLL_PR_UINT(tb, DPLL_A_PHASE_OFFSET_AVG_FACTOR, "phase-offset-avg-factor"); + DPLL_PR_ENUM_STR_FMT(tb, DPLL_A_FREQUENCY_MONITOR, + "frequency-monitor", + " frequency-monitor: %s\n", + str_enable_disable); } /* Netlink callback - device get (single device) */ @@ -1219,25 +1259,20 @@ static int cmd_device_set(struct dpll *dpll) dpll_parse_mode)) return -EINVAL; } else if (dpll_argv_match(dpll, "phase-offset-monitor")) { - const char *str = dpll_argv_next(dpll); - bool val; - - if (!str) { - pr_err("phase-offset-monitor requires an argument\n"); - return -EINVAL; - } - if (str_to_bool(str, &val)) { - pr_err("invalid phase-offset-monitor value: %s (use enable/disable)\n", - str); + if (dpll_parse_attr_feature_state(dpll, nlh, + "phase-offset-monitor", + DPLL_A_PHASE_OFFSET_MONITOR)) return -EINVAL; - } - mnl_attr_put_u32(nlh, DPLL_A_PHASE_OFFSET_MONITOR, - val ? 1 : 0); } else if (dpll_argv_match(dpll, "phase-offset-avg-factor")) { if (dpll_parse_attr_u32(dpll, nlh, "phase-offset-avg-factor", DPLL_A_PHASE_OFFSET_AVG_FACTOR)) return -EINVAL; + } else if (dpll_argv_match(dpll, "frequency-monitor")) { + if (dpll_parse_attr_feature_state(dpll, nlh, + "frequency-monitor", + DPLL_A_FREQUENCY_MONITOR)) + return -EINVAL; } else { pr_err("unknown option: %s\n", dpll_argv(dpll)); return -EINVAL; @@ -1601,6 +1636,7 @@ static void dpll_pin_print_attrs(struct nlattr **tb) DPLL_PR_ENUM_STR(tb, DPLL_A_PIN_TYPE, "type", dpll_pin_type_name); DPLL_PR_U64_FMT(tb, DPLL_A_PIN_FREQUENCY, "frequency", " frequency: %" PRIu64 " Hz\n"); + DPLL_PR_MEASURED_FREQUENCY(tb, DPLL_A_PIN_MEASURED_FREQUENCY); dpll_pin_print_freq_supported(tb[DPLL_A_PIN_FREQUENCY_SUPPORTED]); diff --git a/man/man8/dpll.8 b/man/man8/dpll.8 index 89f17af74923..59ec4208f251 100644 --- a/man/man8/dpll.8 +++ b/man/man8/dpll.8 @@ -111,7 +111,7 @@ Temperature (if supported) Type (PPS or EEC) .RE -.SS dpll device set id ID [ mode { automatic | manual } ] [ phase-offset-monitor { enable | disable } ] [ phase-offset-avg-factor FACTOR ] +.SS dpll device set id ID [ mode { automatic | manual } ] [ phase-offset-monitor { enable | disable } ] [ phase-offset-avg-factor FACTOR ] [ frequency-monitor { enable | disable } ] Configure DPLL device parameters. @@ -140,6 +140,14 @@ When enabled, the kernel continuously measures and reports phase differences. Set the averaging factor (1-255) applied to phase offset calculations. Higher values provide smoother but slower-responding measurements. +.TP +.BI frequency-monitor " { enable | disable | true | false | 0 | 1 }" +Enable or disable frequency monitoring on the device. When enabled, the +kernel continuously measures and reports actual pin frequencies, which can +be read via the +.B measured-frequency +field in pin show output. + .SS dpll device id-get [ module-name NAME ] [ clock-id ID ] [ type TYPE ] Retrieve the device ID based on identifying attributes. Useful for scripting @@ -233,7 +241,9 @@ Board label (hardware label from device tree or ACPI) .IP \[bu] Pin type (mux, ext, synce-eth-port, int-oscillator, gnss) .IP \[bu] -Frequency and supported frequency ranges +Configured frequency and supported frequency ranges +.IP \[bu] +Measured frequency in Hz (when frequency monitoring is enabled) .IP \[bu] Capabilities (state-can-change, priority-can-change, direction-can-change) .IP \[bu] @@ -372,6 +382,11 @@ Press Ctrl+C to stop monitoring. .B dpll device set id 0 phase-offset-monitor enable .fi +.SS Enable frequency monitoring on device 0 +.nf +.B dpll device set id 0 frequency-monitor enable +.fi + .SS Show all EEC devices .nf .B dpll device show type eec -- 2.53.0