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Tue, 08 Sep 2026 15:57:40 -0700 (PDT) From: Zinc Lim To: alexanderduyck@fb.com, kuba@kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, pabeni@redhat.com, linux@roeck-us.net, horms@kernel.org, mohsin.bashr@gmail.com Cc: kernel-team@meta.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, zinclim@meta.com, limzhineng2@gmail.com Subject: [PATCH net-next v3 0/6] eth: fbnic: expand hwmon sensor support Date: Tue, 8 Sep 2026 15:57:31 -0700 Message-ID: <20260908225737.3034403-1-limzhineng2@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit fbnic currently exposes only the raw temperature and voltage readings (temp1_input, in0_input) via hwmon. This series builds that out into a complete sensor interface and hardens the read path. The firmware capability response already carries per-board sensor thresholds, and the firmware can asynchronously report when a sensor crosses one of them. This series surfaces both to userspace and cleans up the supporting plumbing: - Move the sensor read logic out of fbnic_mac, closer to its only caller in the hwmon code, and drop the now-unused get_sensor op. - Expose all hwmon attributes unconditionally as read-only (0444). - Cache the temperature and voltage readings for the current jiffy so a burst of attribute reads issues a single firmware round-trip. - Parse and expose the temperature (min/max/crit) and voltage (min/max) thresholds. Thresholds the firmware did not populate read back as -ENODATA. - Add the corresponding alarm attributes, computed by comparing a live reading against the stored thresholds. - Translate the firmware's sensor-threshold-exceeded message into an hwmon event so userspace is notified on the relevant attribute. Changes from v2: - Addressed Jakub's patch 3 feedback on jiffy comparison when checking cache validity. Changes from v1: - Addressed Jakub's patch 6 feedback on including a if (!IS_REACHABLE(CONFIG_HWMON)) return; guard. Zinc Lim (6): eth: fbnic: move sensor read logic out of fbnic_mac eth: fbnic: expose all hwmon attributes unconditionally as read-only eth: fbnic: cache hwmon sensor readings eth: fbnic: report temperature and voltage thresholds via hwmon eth: fbnic: report temperature and voltage alarms via hwmon eth: fbnic: firmware notifies hwmon on sensor threshold events drivers/net/ethernet/meta/fbnic/fbnic.h | 8 + drivers/net/ethernet/meta/fbnic/fbnic_fw.c | 75 +++++ drivers/net/ethernet/meta/fbnic/fbnic_fw.h | 30 ++ drivers/net/ethernet/meta/fbnic/fbnic_hwmon.c | 262 ++++++++++++++++-- drivers/net/ethernet/meta/fbnic/fbnic_mac.c | 55 ---- drivers/net/ethernet/meta/fbnic/fbnic_mac.h | 2 - 6 files changed, 348 insertions(+), 84 deletions(-) -- 2.53.0-Meta