From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f51.google.com (mail-ed1-f51.google.com [209.85.208.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id ACF7C439010 for ; Thu, 30 Jul 2026 13:31:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785418289; cv=none; b=qet0ALkfHyWLoc9pML7KeumsrGWlHkCoPflbZrbYfGO0AtV0zpNnt0uPaNgLx/tGoY8AIZtFxE6begXeTjFPT4mNVe0yLSH2e1H59jtKILeZds8Vhcz7JHCX62wOa8LdmRQsR39rF+RjAE6oCQDP8vbqjMTZob2/NnMsF9sWxYQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785418289; c=relaxed/simple; bh=UkBJmfqs8l3S14i7K7iFj6KJJ86Oz/FXaGKO5mJrZ+w=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UrESk2s9hPp7d5ZWdH3Uyw8HdS256MU0ey2Ei56aGXss1h/Co+O/JK1t1P4jSogYa3JbvL6Pfc4F4ybGPeQ8vTAjMYzJbazbdUDOspIS5DTLB5eHD5lDRogaUAQKbE/kwClDPEfqiuEo2GoDNQ8tuDi3e8WWlRcyVDiUAh69fDU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=CnboAj3N; arc=none smtp.client-ip=209.85.208.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="CnboAj3N" Received: by mail-ed1-f51.google.com with SMTP id 4fb4d7f45d1cf-6a07a051a81so1460873a12.0 for ; Thu, 30 Jul 2026 06:31:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1785418286; x=1786023086; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=YqkMyE5v64XraDfbtgWG92rltHOmj6zAfHfG5b14r08=; b=CnboAj3NoE2uw4RuDxB58LfTJ6qead0neuPN2YotCVnNE9QOXeAJukZ7UkBhHAkvgx ccaCRCaPV5xvkr7miXBbvCqGmTPRG55nXk+LHzz3BogDjorQ1zI5Y3NaPfHRzMGiBr+m WsjaRk0cUsZk2ieO3fqDTPLkdymMM1Q7pxDGRxjUwXgDxMLF4Ps0UQtKK3ybbtxmFoqk e7zyi/UlzCsDmQvJGKJAuOt/fmgxDVuHJyFfl9fyKCKgz40xHTHei/Y2p52sheyNOc0v mls+pE1ifKB7TZC6g0dbXU1sYXI4rOHjeWn3ye7l8ptaAz0JrOscHWy9cMxD2mfMiR5d H9og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785418286; x=1786023086; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=YqkMyE5v64XraDfbtgWG92rltHOmj6zAfHfG5b14r08=; b=HAh0kSQdGyUCd2yi3r9AwyTezOeQxfNuqGHY9347zHfgc5fc5iRlESdf0ofKbtPMle M/bA3ryzYMUffo1JopLhcqItnoa19JWsF+gSyhYtqwV1s1a+hBoq4k8Ek8hImArXlezB QL70ov2e5LL0XMGRZM8sFzEBqCRzsflUEabZl4BMUId2KNIK+YaPq0klNOTUIOPAXXqZ dD/kOTcbbRyw4qSDm/4YsPXSv75RjhWLV9csrINom9e/FWJuMzDQf4RKjE192RspvdnJ onB3vsLBLy8a/1rIjyADZzxzdGGaYrdz3Xen/6ejeMjLOK3tp6AAeaPeaRkhDCuvmqhk k+NQ== X-Forwarded-Encrypted: i=1; AHgh+RpUMZDdU/yo1MW2pkvMLc33/fL4DtxyMx1s+cTza2osKQ+jy1QJG5Br4dNiMaE0cQFo0wU/zbiy+HHmOg==@vger.kernel.org X-Gm-Message-State: AOJu0YxeAzFnBW6tZSXZhaCbPu/EzE3C0uZEo82MClldBJRqqP4Gzvjp Xyb9Mo1aVNYsgGQJPwj2XNkDy4lj4e6gpT10UBCS9tKjLXRKoQWZqQMc X-Gm-Gg: AR+sD10sp9Z7Jh5lzWQuYWjSUMN6FIku1tWphZLOErWC2jeNT+k6lDxZNmvCDmm+MMW 73GYLRAUj1ba/dFO0Ou1cvjY8onZTYphBoTRyeVS6vZNibbS1nGekqWsNaH8hX3e9QZToF9ytuE H7uGHket1ng3RFCHxzyf6K/tNy6ZBVwu42lfZYK4hhWJ3RLa0xdKAO7dntsU9fR/GfwM30aRVi3 Qo2l0q7iyEb5nAXp7WMUPsK6rPzLKafynS4vRI8rj1HMb7DxAXDzvbaVZLY0H973zxOwen9324T GscSDEkzx+UayHvCgaMjjjWdH8UECgzJKsqK3YUWTikTTjrqJeqDnLenfFzrnwazcDLFq3+leWw QVYW5gxLPcRZASjVmxufqb4WeVj8Q63EGjwWdLTyL32DN5nN0JyL/Xbw6I+k2Iyepw8lAH5PaOe fo+Rv5qoebqjXdJmje1JeU+qHrqGpdqZvT2nL1sNuYkih57wXgtabvBqm4j1ECiXb/rlzBAoI3v dSY9LPuHKMchjD4GMW39RPYwysHRMIWhYFr/BzTl2Rj2rCNT5QJkPLN X-Received: by 2002:a05:6402:26d6:b0:698:b1bc:ed5f with SMTP id 4fb4d7f45d1cf-6a07b83c3ddmr1200600a12.30.1785418285353; Thu, 30 Jul 2026 06:31:25 -0700 (PDT) Received: from fedora.tux.internal (85.191.71.118.dynamic.dhcp.aura-net.dk. [85.191.71.118]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-6a07d393c48sm565891a12.24.2026.07.30.06.31.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Jul 2026 06:31:24 -0700 (PDT) From: Bruno Thomsen To: devicetree@vger.kernel.org, linux-hwmon@vger.kernel.org, Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-kernel@vger.kernel.org, Bruno Thomsen Subject: [PATCH 2/2] hwmon: (tmp401) add channel label support Date: Thu, 30 Jul 2026 15:30:58 +0200 Message-ID: <20260730133058.14731-2-bruno.thomsen@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260730133058.14731-1-bruno.thomsen@gmail.com> References: <20260730133058.14731-1-bruno.thomsen@gmail.com> Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Allow userspace application to select temperature sensor based on channel label in device tree, just like it's possible in lm90. Signed-off-by: Bruno Thomsen --- drivers/hwmon/tmp401.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/hwmon/tmp401.c b/drivers/hwmon/tmp401.c index ca0ff525ea29..13c5da4df447 100644 --- a/drivers/hwmon/tmp401.c +++ b/drivers/hwmon/tmp401.c @@ -117,6 +117,7 @@ struct tmp401_data { struct hwmon_channel_info temp_info; const struct hwmon_channel_info *info[3]; struct hwmon_chip_info chip; + const char *channel_label[4]; }; /* regmap */ @@ -467,6 +468,16 @@ static int tmp401_read(struct device *dev, enum hwmon_sensor_types type, } } +static int tmp401_read_string(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, const char **str) +{ + struct tmp401_data *data = dev_get_drvdata(dev); + + *str = data->channel_label[channel]; + + return 0; +} + static int tmp401_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { @@ -502,6 +513,7 @@ static umode_t tmp401_is_visible(const void *data, enum hwmon_sensor_types type, case hwmon_temp_fault: case hwmon_temp_lowest: case hwmon_temp_highest: + case hwmon_temp_label: return 0444; case hwmon_temp_min: case hwmon_temp_max: @@ -521,6 +533,7 @@ static umode_t tmp401_is_visible(const void *data, enum hwmon_sensor_types type, static const struct hwmon_ops tmp401_ops = { .is_visible = tmp401_is_visible, .read = tmp401_read, + .read_string = tmp401_read_string, .write = tmp401_write, }; @@ -531,6 +544,7 @@ static int tmp401_init_client(struct tmp401_data *data) struct regmap *regmap = data->regmap; u32 config, config_orig; int ret; + u32 ch; u32 val = 0; s32 nfactor = 0; @@ -590,6 +604,26 @@ static int tmp401_init_client(struct tmp401_data *data) return ret; } + for_each_child_of_node_scoped(data->client->dev.of_node, child) { + ret = of_property_read_u32(child, "reg", &ch); + if (ret) { + dev_err(&data->client->dev, "missing reg property of %pOFn\n", child); + return ret; + } + if (ch >= ARRAY_SIZE(data->temp_channel_config) || + !data->temp_channel_config[ch]) { + dev_err(&data->client->dev, "invalid reg %u of %pOFn\n", ch, child); + return -EINVAL; + } + ret = of_property_read_string(child, "label", &data->channel_label[ch]); + if (ret == -ENODATA || ret == -EILSEQ) { + dev_err(&data->client->dev, "invalid label property in %pOFn\n", child); + return ret; + } + if (data->channel_label[ch]) + data->temp_channel_config[ch] |= HWMON_T_LABEL; + } + return 0; } -- 2.55.0