From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f178.google.com (mail-pl1-f178.google.com [209.85.214.178]) (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 B1FE03921E4 for ; Sat, 11 Jul 2026 09:33:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.178 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783762414; cv=none; b=nSMavpV8Iy1X4GyZo0ywjnG1Y3t4ke50mxqpmGn18ul0qnZg//WgZMUTL4vPUmUQzbq8lFVczzhCLhR/A7me2r63C+OqLyFqJJfBASThTX67d0UzndSzKB5KREzTE/mBtLEH5ruXZQthgsx0jXMvX8Qtu1rmJ/lxJRSJHHi5alI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783762414; c=relaxed/simple; bh=TFMbF+6YpQE5zKhsi92k+6lG3+v7THpi7mqTMKsa1tE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=L2J1vI2rDeORYx7yIss0UQIxSBCUOJHAJ3Wl12sAmTgeuFueEthoESq51Tz0UJV1ZlM0vbo4r4LEObb8fVFXb0IJ+JOOxj8QtCVgSQb1rUFczSS0rkOzU51Do3HlaTRtskmx65mBNmQXPAyX+FoLrGBYtjjhnHfuRmldd6v4wEw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.214.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pl1-f178.google.com with SMTP id d9443c01a7336-2cce6a0c9c3so15787925ad.1 for ; Sat, 11 Jul 2026 02:33:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783762412; x=1784367212; 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=fCVs3YON/pS66KjufLTdz6MFzQkosWnFvToVGu3OBSs=; b=M+9e3PncBWNnhXjwSuvVmjZOTovrNcvUZrlt5/Iycgs9LJ5HvQ0MTzZ3WSNHMovHuQ vzM5BvjfGtFsA8dlb7FiiikJq5Hze4Qzv+94Mdf+/VvwlDqOI11uUr1eBEU151eR35k5 +VusWZ9z0yi9aByVq2JnYSrCqwrgvzxehhy5300hGT2/J/jI0qoXmnbPbz/4hMJxNTiv fzZDFYfMLVb62l2h7GSCy1VooRt7M6UEkgxmZEU+sYUkadV+5YZajqxzFIn7gZJ5oHfe Y3qTbet1NSg4mzvae7QH05aNbXualLEYcddJJ8C43rEwEj72TOxBgCvDl30Qt79eBJUd DF6w== X-Forwarded-Encrypted: i=1; AHgh+Rp5UoQrH0flWQnECZQT+qq3inhiLNIpyBASFxV2rsPr0MPzyv0bqD4Yn0vWw01IKXZPVvXvnSKLvCpfhhE=@vger.kernel.org X-Gm-Message-State: AOJu0YxTys/QmghXI7TRZaGfLnzF8KhOuvowsgtEvAyRc6BgGdvO/Hcv RpJ30EodcVJCj/P9URg8CDXmqHK2HDR7aa1G+RwyJVg67hV1WkjICY8= X-Gm-Gg: AfdE7cn1oM62/2QkOxSUjWRdJXnCJ+8V78xBJM2OJIy3tqF6jyFoPZP7q/sqodLpu75 hu4stmUt+SepqLiFmYb+6l1NJro/pOaJW9026P3gXuKOFqT2RjyJwMXv+/YrIYpmbgjcQfZPfVs F5fzDrFlQ/VmGI9h1Eg4iKZUYKEbMpSI+fJuKSr9Vzb5e7gDLhb4jpzlBUmDOJ8WRcr5xMmUgUe GuTjxHF7i/V8XMN0UG2zL5tCT5IH/sAm6QiowhbCYxQ3Ys3SjZjo3y5p8hpHGTATDEPuLZK5pt+ 70SXhfjVv+9O4aOlcGH+6gUbFqNBoQSUfRmKdqk16haetPPHHfhuzvHT4lXJVBYc/gBrF9/7tBw owiCUmK9kXjeVpCmPCkAfTpFdBjZ4c4Th5Zje78freGZ4hrOsVXIVEoWuppe6+1QlLHfPCP7A2X TFD+HMeQkUNT7BRAkWuDO5NvWacotR2OWZ2GzBri7ZKqkp+HNlu+rneL/de9b/R7U2+N5S6DAPD Gr9/3YnKRiXKrJPGNjnmcjYVQ== X-Received: by 2002:a17:903:3250:b0:2c0:db23:4c4 with SMTP id d9443c01a7336-2ce9eac4b01mr23239435ad.16.1783762411975; Sat, 11 Jul 2026 02:33:31 -0700 (PDT) Received: from penguin.tail0a1999.ts.net (61-228-52-13.dynamic-ip.hinet.net. [61.228.52.13]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ccc9d3d451sm71389135ad.65.2026.07.11.02.33.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Jul 2026 02:33:31 -0700 (PDT) From: Shih-Yuan Lee To: Henrik Rydberg , Guenter Roeck Cc: Armin Wolf , linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, Shih-Yuan Lee Subject: [PATCH v6 1/3] hwmon: (applesmc) Cache fan positions during register initialization Date: Sat, 11 Jul 2026 17:33:21 +0800 Message-Id: <20260711093323.14529-2-fourdollars@debian.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260711093323.14529-1-fourdollars@debian.org> References: <20260710123236.10508-1-fourdollars@debian.org> <20260711093323.14529-1-fourdollars@debian.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit To support the read_string callback for fan labels in the modern HWMON API, load and cache the fan position names in smcreg.fan_positions during register initialization. Pre-pad fallback labels with four spaces to match the "+ 4" pointer arithmetic offset used by all fan labels in the read_string callback. Signed-off-by: Shih-Yuan Lee --- drivers/hwmon/applesmc.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c index 90a14a7f2c4c..9b2d9ecb20c0 100644 --- a/drivers/hwmon/applesmc.c +++ b/drivers/hwmon/applesmc.c @@ -133,6 +133,7 @@ static struct applesmc_registers { bool init_complete; /* true when fully initialized */ struct applesmc_entry *cache; /* cached key entries */ const char **index; /* temperature key index */ + char fan_positions[10][17]; /* cached fan position labels */ } smcreg = { .mutex = __MUTEX_INITIALIZER(smcreg.mutex), }; @@ -566,7 +567,7 @@ static int applesmc_init_smcreg_try(void) { struct applesmc_registers *s = &smcreg; bool left_light_sensor = false, right_light_sensor = false; - unsigned int count; + unsigned int count, i; u8 tmp[1]; int ret; @@ -597,6 +598,16 @@ static int applesmc_init_smcreg_try(void) if (s->fan_count > 10) s->fan_count = 10; + for (i = 0; i < s->fan_count; i++) { + char newkey[5]; + + scnprintf(newkey, sizeof(newkey), FAN_ID_FMT, i); + ret = applesmc_read_key(newkey, s->fan_positions[i], 16); + s->fan_positions[i][16] = 0; + if (ret) + scnprintf(s->fan_positions[i], 17, " Fan %d", i); + } + ret = applesmc_get_lower_bound(&s->temp_begin, "T"); if (ret) return ret; -- 2.39.5