From patchwork Sun Mar 24 20:12:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Kemnade X-Patchwork-Id: 13602397 Received: from mail2.andi.de1.cc (vmd64148.contaboserver.net [161.97.139.27]) (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 984CE71746 for ; Mon, 25 Mar 2024 15:08:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=161.97.139.27 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711379323; cv=none; b=jmt72jhRiNdYfuQIvHkyjNKZMnZuy+ebEus9pXMjYptm2stAvuS8isTuCck9dx85a+sma6GZtZXqLg2HEWs8OazxF/P6vw8jYrLuzAmDhWDkZzL+fc61pQBy9OaDmOEfXL0QKQV1NQRKQ8KiIQPZZuXx20vYUvEmD5zPrmHQkFc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711379323; c=relaxed/simple; bh=yuwjtveKEbaL2UN5MUISEfFsSHypms+Pae4GIvHAq7M=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ckWj+OoMTxz+paYifby70ewoVINEKoC+psO5u6WR0ZybBmeD4LugyOfT4NEA47djePnmhzVz4GKPM2PT8vVi0SE0neQz2CFroxVHWsidX/JlhXiJpaZOAGUeTmhvy0eCwYoYv1ZAGqNXubIUT7A5Q4cx4yHCTyGX5KwSyJKlWmQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kemnade.info; spf=pass smtp.mailfrom=kemnade.info; dkim=pass (2048-bit key) header.d=kemnade.info header.i=@kemnade.info header.b=gqLR18gn; arc=none smtp.client-ip=161.97.139.27 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kemnade.info Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kemnade.info Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kemnade.info header.i=@kemnade.info header.b="gqLR18gn" Received: from mail.andi.de1.cc ([2a02:c205:3004:2154::1]) by mail2.andi.de1.cc with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1rolwE-003KEk-2S for imx@lists.linux.dev; Mon, 25 Mar 2024 16:08:38 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kemnade.info; s=20220719; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=NfgmcINbKPDsoie0JtH7mN1+qoCT0MNsvrJB7mPvdII=; b=gqLR18gnnboPMYwN2nCyKZCucU BjKN5z2jbUjHe/IpT79E1Tn8JdVrsBXlg0duVIrIGIukJjYwdDhhm3BdI5KQSFKs/RK1J308eY3O1 BQzCDSZOTZJccfdnPEHgtNkYv/Ek5/WM+CYPzW+TAYrRfoAGZproLSjGmsdJioq5Zn60nMZRJwILx Eklssc9RsdeuSzSg/nW8GECrqZvvHsNXrsUmucqj7htOTvsj+Kqq2KgPPYQf8Mcg98CN9X81eihug BwKULqBCYLP8m/z6LqFCeTuTzpFQdTDkLBj+ABUnKh8IWZA886vmDgHK9fK0diBa6UrOACXitLWWd mmd5xhqg==; Received: from p2003010777026a001a3da2fffebfd33a.dip0.t-ipconnect.de ([2003:107:7702:6a00:1a3d:a2ff:febf:d33a] helo=aktux) by mail.andi.de1.cc with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1roUCV-000Y9r-Fy; Sun, 24 Mar 2024 21:12:14 +0100 Received: from andi by aktux with local (Exim 4.96) (envelope-from ) id 1roUCU-000yRE-1A; Sun, 24 Mar 2024 21:12:14 +0100 From: Andreas Kemnade To: lee@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, mazziesaccount@gmail.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev Cc: Andreas Kemnade Subject: [RFC PATCH 2/2] mfd: rohm-bd71828: Add power off functionality Date: Sun, 24 Mar 2024 21:12:10 +0100 Message-Id: <20240324201210.232301-3-andreas@kemnade.info> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240324201210.232301-1-andreas@kemnade.info> References: <20240324201210.232301-1-andreas@kemnade.info> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Since the chip can power off the system, add the corresponding functionality. Based on https://github.com/kobolabs/Kobo-Reader/raw/master/hw/imx6sll-clara2e/kernel.tar.bz2 No information source about the magic numbers found. Signed-off-by: Andreas Kemnade --- drivers/mfd/rohm-bd71828.c | 31 ++++++++++++++++++++++++++++++- 1 file changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/mfd/rohm-bd71828.c b/drivers/mfd/rohm-bd71828.c index 594718f7e8e1..5a55aa3620d0 100644 --- a/drivers/mfd/rohm-bd71828.c +++ b/drivers/mfd/rohm-bd71828.c @@ -464,6 +464,24 @@ static int set_clk_mode(struct device *dev, struct regmap *regmap, OUT32K_MODE_CMOS); } +static struct i2c_client *bd71828_dev; +static void bd71828_power_off(void) +{ + i2c_smbus_write_byte_data(bd71828_dev, 0x03, 0xff); + mdelay(500); + i2c_smbus_write_byte_data(bd71828_dev, BD71828_REG_INT_DCIN2, 0x02); + mdelay(500); + while (true) { + i2c_smbus_write_byte_data(bd71828_dev, BD71828_REG_PS_CTRL_1, 0x02); + mdelay(500); + } +} + +static void bd71828_remove_poweroff(void *data) +{ + bd71828_dev = NULL; +} + static int bd71828_i2c_probe(struct i2c_client *i2c) { struct regmap_irq_chip_data *irq_data; @@ -542,7 +560,18 @@ static int bd71828_i2c_probe(struct i2c_client *i2c) ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, mfd, cells, NULL, 0, regmap_irq_get_domain(irq_data)); if (ret) - dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n"); + return dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n"); + + if (of_device_is_system_power_controller(i2c->dev.of_node)) { + if (!pm_power_off) { + bd71828_dev = i2c; + pm_power_off = bd71828_power_off; + ret = devm_add_action_or_reset(&i2c->dev, + bd71828_remove_poweroff, + NULL); + } else + dev_warn(&i2c->dev, "Poweroff callback already assigned\n"); + } return ret; }