From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794063135; b=R8m004uVNFXVd6oKoqYuwNZf6KJeDosbu9ClcgQD9hIq5jifGZZZEX750FMAA3y4cf7y 0I5Jvlryv/M5fjSs8mC1pcRvaucN1K6MqshXFJi58WGJhv8r1tD3gF0+tZQzrAjS1NY+Z tOZda2ADO8H8rKflKX5h4dh0RS2kgdveKpcXj7TJcMTz6T0A6fnk58aQ782bHddadCBqf 4FJpf0TQwIefcTZB+bvuv5SLn80pQw4kuweaO0k/20Sd9gk+fe/GutIb/tUMxQvxwoWc+ vSTlimRi2Z5wJap46Ya3oGZmBQTm+ljkSF/KmYjgPRAKipPToQB/wQ5iUqcEsJKn6eg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794063135; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=6huHyqFeIBKMvGDHzWGxho6A1r78PXkv6qo8rjIodcY=; b=PmwL4AtJ6gyN5td3kd7T6a1lS7w3/4su9vXFwgMqAitpRka2ZRCgT4TnAoHExpGqC8Eh jSWpM/tE8ZxEIu2u1578xUk9WSmYTqrBg/RucfkiM45b951MJ43MInwyxJUjnc7XkhAIV Y1q7uUYalWqY9hNgItwi473OfRVMUsn/sMwrW/Lcy52psGT3J5ikNCWKE/JJUfqihFDEn 5n+DDgpLp58jrrDE36diDtzWuEyAj/ygNo9XQDIc7f35niwIpKxXXDsDUFItBHkCgbTHc fMWOaJa57MFd1Fl+g5Z6KYP8y8pqAWfywmRFc8WThgw4ywEOAZXeeLxOaYEgbK+p8UQ== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Nc1ga4no; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2EE77606D81B; Sat, 7 Nov 2026 14:52:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Nc1ga4no Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC9581F008A1; Sat, 7 Nov 2026 14:52:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1794063135; bh=6huHyqFeIBKMvGDHzWGxho6A1r78PXkv6qo8rjIodcY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Nc1ga4nowMlDNPB0syv9787YNNmwsl2PSpXw7mSI8ZT6Vc7cxvoQurgBiDNLPjvMl X6thPz7bkTQxC3xBJCFE0E7D2KRAnhnW8umDHQpKAq4f6ezje7vixjo0+phFjfHd1R XjYJ9y93pRCxc9QoQkT0THVRZPm96SIuwa1nZTd4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Linus Walleij , Sebastian Reichel , Sasha Levin Subject: [PATCH 6.18 364/869] power: supply: ab8500_fg: Report sub-percent charge changes Date: Sat, 7 Nov 2026 08:50:46 -0500 Message-ID: <20261107134904.985556412@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261107134852.069646174@linuxfoundation.org> References: <20261107134852.069646174@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: stable@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Linus Walleij [ Upstream commit 4d40dba1815d46c6ef9019ed80e3b998b0fc443d ] The fuel gauge updates bat_cap.mah from the coulomb counter but exposes bat_cap.prev_mah through CHARGE_NOW and ENERGY_NOW. It only refreshes prev_mah when the rounded integer capacity percentage changes, making the momentary properties appear frozen between percentage steps. Refresh prev_mah and notify userspace whenever the new charge remains within the currently accepted percentage. If a discharge estimate tries to cross upward into a higher percentage, the existing rejection still leaves both the reported percentage and charge unchanged. The AB8500 fuel-gauge implementations in the Samsung-GT-I8160-Codina, Samsung-GT-I8160_HD-Codina, Samsung-GT-I8530-Gavini, Samsung-GT-S7710-Skomer, Samsung-SGH-I407-Kyle and Samsung-SGH-T599-Codina-TMO product trees retain the same percentage-gated prev_mah update and contain no finer-grained reporting workaround. Fixes: 13151631b5bd ("ab8500-fg: A8500 fuel gauge driver") Cc: stable@vger.kernel.org Assisted-by: LLM Signed-off-by: Linus Walleij Link: https://patch.msgid.link/20260916-ab8500-charging-v1-2-e986ed321cc6@kernel.org Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin --- drivers/power/supply/ab8500_fg.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c index b122bd473c773..3b0a5bdd352b5 100644 --- a/drivers/power/supply/ab8500_fg.c +++ b/drivers/power/supply/ab8500_fg.c @@ -1387,6 +1387,13 @@ static void ab8500_fg_check_capacity_limits(struct ab8500_fg *di, bool init) } } + /* Keep the charge properties current between percentage changes. */ + if (di->bat_cap.prev_percent == percent && + di->bat_cap.prev_mah != di->bat_cap.mah) { + di->bat_cap.prev_mah = di->bat_cap.mah; + changed = true; + } + if (changed) { if (di->bm->capacity_scaling) { di->bat_cap.cap_scale.scaled_cap = -- 2.53.0