From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx.nabladev.com (mx.nabladev.com [178.251.229.89]) (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 55C49408600; Mon, 24 Aug 2026 11:05:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.251.229.89 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787569525; cv=none; b=M5tjbPX6FkfN32Hj+Nr0j6DrVmj2gi/NVxLuJ4ZMmYdD0TscN1veUk8jwAw/oZofjgokhbbTKT2W45KadP/P27RDu0YgSII/Fy6BxY4E6geaoaQIJkjUBt9w2d/zbrMQcsXlRm0YSnh/H+LtzCQVkE36ip6ERx+0k0atAGU5gbs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787569525; c=relaxed/simple; bh=AXXzxZOVFVp5X1iXfysEhnZiwNgzRYwKDrjFSlNasnU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tKz25CsnoCNuCEttMyHzPfgdu8pZcvcssCf1fmpj36CzgyQA8SD4Y0Pq7Ge8EybcoK4nnLu+Torx8euP8nWHcek7WxmFNX7iovIh+n8TVs4AeAj2S+3jagEaQBhwqDLQRO4CR+OusGQbsJFtnO9FfHOfJD1eA7yPPjCyyN+G3Jk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nabladev.com; spf=pass smtp.mailfrom=nabladev.com; dkim=pass (2048-bit key) header.d=nabladev.com header.i=@nabladev.com header.b=dkkwqBDe; arc=none smtp.client-ip=178.251.229.89 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nabladev.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=nabladev.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=nabladev.com header.i=@nabladev.com header.b="dkkwqBDe" Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 2699611C980; Mon, 24 Aug 2026 13:05:18 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nabladev.com; s=dkim; t=1787569518; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=FpxiEYtnqxJP+VIz0Hk8ir5Iu/kohRwyYSXoTqAl+wA=; b=dkkwqBDe+BhPACZyI9OiUnSMt++SYY1zPOojETSH37sBsnrZKWHZQLyQLCoMvpOL9PDfPi XwhXgzMMwGBodlUwfduQdScsVgmBTpfwmPC2whAVhs3VL1ILbH3Os5YY/NCKpl6gOR6IKj liL7ctdJBzG3SBdbmLICyazY17ggTXd0o/aDM5BYQkatxr80BtQx7+wiXuk4kfsKZptnLY 5Yz1ogauLepkyCQ+XOmQwjcqzHaPD1MWWDKSmdOaFhOjSNd/vrLHSwp5UFpUfsfomGOR5U UOMkAD0TlDROQ6EP26ZXOCni5Mmxrt1TnsSzCXv2D0N+XldzYD2KVhoMfrXTcQ== From: Heiko Schocher To: Alexandre Belloni Cc: linux-rtc@vger.kernel.org, Conor Dooley , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , Rob Herring , devicetree@vger.kernel.org, Heiko Schocher Subject: [PATCH v1 3/3] rtc: rs5c372: support eco mode on R2223x Date: Mon, 24 Aug 2026 13:04:26 +0200 Message-ID: <20260824110452.4038870-4-hs@nabladev.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260824110452.4038870-1-hs@nabladev.com> References: <20260824110452.4038870-1-hs@nabladev.com> Precedence: bulk X-Mailing-List: linux-rtc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 The R2223x can run in an eco mode that lowers its current consumption from the backup supply. Enable it when ricoh,eco-mode property is set in the device tree. Signed-off-by: Heiko Schocher --- drivers/rtc/rtc-rs5c372.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c index 30e272d65021..41d391bf07f7 100644 --- a/drivers/rtc/rtc-rs5c372.c +++ b/drivers/rtc/rtc-rs5c372.c @@ -52,6 +52,7 @@ #define RS5C_REG_CTRL2 15 # define RS5C372_CTRL2_24 (1 << 5) # define RS5C_CTRL2_XSTP (1 << 4) /* only if !R2x2x */ +# define R2223x_CTRL2_ECO (1 << 7) /* only if R2223x */ # define R2x2x_CTRL2_VDET (1 << 6) /* only if R2x2x */ # define R2x2x_CTRL2_XSTP (1 << 5) /* only if R2x2x */ # define R2x2x_CTRL2_PON (1 << 4) /* only if R2x2x */ @@ -802,6 +803,24 @@ static int rs5c_oscillator_setup(struct rs5c372 *rs5c372) return 0; } +static int rs5c372_set_eco_mode(struct rs5c372 *rs5c372, bool eco) +{ + struct i2c_client *client = rs5c372->client; + int ctrl2; + + ctrl2 = i2c_smbus_read_byte_data(client, RS5C_ADDR(RS5C_REG_CTRL2)); + if (ctrl2 < 0) + return ctrl2; + + if (eco) + ctrl2 |= R2223x_CTRL2_ECO; + else + ctrl2 &= ~R2223x_CTRL2_ECO; + + return i2c_smbus_write_byte_data(client, RS5C_ADDR(RS5C_REG_CTRL2), + ctrl2); +} + static int rs5c372_probe(struct i2c_client *client) { int err = 0; @@ -898,6 +917,13 @@ static int rs5c372_probe(struct i2c_client *client) rs5c372->time24 ? "24hr" : "am/pm" ); + if (rs5c372->type == rtc_r2223x && + device_property_read_bool(&client->dev, "ricoh,eco-mode")) { + err = rs5c372_set_eco_mode(rs5c372, true); + if (err < 0) + return err; + } + /* REVISIT use client->irq to register alarm irq ... */ rs5c372->rtc = devm_rtc_device_register(&client->dev, rs5c372_driver.driver.name, -- 2.55.0