From patchwork Thu Nov 15 09:35:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chen-Yu Tsai X-Patchwork-Id: 10684023 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 856E914D6 for ; Thu, 15 Nov 2018 09:39:48 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 728502BB97 for ; Thu, 15 Nov 2018 09:39:48 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 661B32BF62; Thu, 15 Nov 2018 09:39:48 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.6 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id E57722BB97 for ; Thu, 15 Nov 2018 09:39:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=yNJVb+xyNnt+B/iewhDuPDbS33WOUpAl7UXmXRdg6l8=; b=Tzk9Dwsr2gPHA3 Wfll8VkqjGoXWCfCjGS0yRqD0uyfI0YPnQHTbc8DOaHrKDpohbCnmGPbIiQYi06DafVWu/9+MwU53 C79XWD/VaPo8sLT1YKHr3zbAbtWo2YmQt1lxmI0qHnDRAwSB+x3LwYFXMpXss7hTETWW9s+E8Vbh3 8gJSgoRjXPlJ4HgwerXtD/8pc+DpRgOM+Rlyu0Ckka9xXtXcRKZWDLIcF3ymiN6pF6SMwgT1uyhp2 AaknWcZ+BHVXWDyMNPi9QWQLxK0EWun1oUNqEI3JJ1tB2vVmCjYPO7UqncPWWaCteO9lSKGxVdtWe QgoE5hwi/Ca/+yw02Knw==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gNE7d-0004EI-GH; Thu, 15 Nov 2018 09:39:37 +0000 Received: from merlin.infradead.org ([2001:8b0:10b:1231::1]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gNE4o-0001SA-Dr for linux-arm-kernel@bombadil.infradead.org; Thu, 15 Nov 2018 09:36:42 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=merlin.20170209; 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=VxRwd9+N+VAcM5hdAO7DfHGBvzvlB5VU4FGcM3wI1Q0=; b=i5Ovwn8X63lzDEBu0IKFkG32W6 MD/QwaYRVIFL3PyGg7n83yyYWXMakRcgZCa4OXMsjRaSKqymnqAbwqjEA7rmO56QLTJrjLN5/nARb AmTK/tv5XtRSxmkYccgfg7jJgvdLs0jLD5qvcoHl9OF1DepuN+ektoJkHP8rwIgMeQu3h4XxAcGrR VldeBA18BOEYF/swjNsfT8+3zRjE2iyHCWyU3s0WcuY8/5B2nk3lsiN5Rlb1PL8uxsNCHKqO7NbWJ iZOv+HR9CRpHuTeh3KJqEjogy2swGQzjYs2G1pJllwzyCPQqoxPqMcbhb54Sq9juCKDKa/PPwjByu YpzWZhGA==; Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76] helo=wens.csie.org) by merlin.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gNE4k-0000je-L7 for linux-arm-kernel@lists.infradead.org; Thu, 15 Nov 2018 09:36:40 +0000 Received: by wens.csie.org (Postfix, from userid 1000) id DDA885FD3D; Thu, 15 Nov 2018 17:36:04 +0800 (CST) From: Chen-Yu Tsai To: Marcel Holtmann , Johan Hedberg , Rob Herring , Mark Rutland , Maxime Ripard Subject: [PATCH v2 09/15] Bluetooth: hci_bcm: Add support for regulator supplies Date: Thu, 15 Nov 2018 17:35:57 +0800 Message-Id: <20181115093603.26729-10-wens@csie.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181115093603.26729-1-wens@csie.org> References: <20181115093603.26729-1-wens@csie.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181115_043639_190338_2A95871B X-CRM114-Status: GOOD ( 18.49 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, Chen-Yu Tsai , Loic Poulain , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The Broadcom Bluetooth chips have two power inputs, VBAT and VDDIO. The former provides overall power for the chip, while the latter powers the I/O pins and buffers. Model these two as regulator supplies, and let the driver manage them in the same way as it does the clock supply. Signed-off-by: Chen-Yu Tsai --- drivers/bluetooth/hci_bcm.c | 39 ++++++++++++++++++++++++++++--------- 1 file changed, 30 insertions(+), 9 deletions(-) diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c index 345d728a5434..f2101038284e 100644 --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -53,6 +54,8 @@ #define BCM_AUTOSUSPEND_DELAY 5000 /* default autosleep delay */ +#define BCM_NUM_SUPPLIES 2 + /** * struct bcm_device - device driver resources * @serdev_hu: HCI UART controller struct @@ -73,7 +76,8 @@ * @btpd: Apple ACPI method to drive BT_REG_ON pin low ("Bluetooth Power Down") * @txco_clk: external reference frequency clock used by Bluetooth device * @lpo_clk: external LPO clock used by Bluetooth device - * @clk_enabled: whether clocks are prepared and enabled + * @supplies: VBAT and VDDIO supplies used by Bluetooth device + * @res_enabled: whether clocks and supplies are prepared and enabled * @init_speed: default baudrate of Bluetooth device; * the host UART is initially set to this baudrate so that * it can configure the Bluetooth device for @oper_speed @@ -105,7 +109,8 @@ struct bcm_device { struct clk *txco_clk; struct clk *lpo_clk; - bool clk_enabled; + struct regulator_bulk_data supplies[BCM_NUM_SUPPLIES]; + bool res_enabled; u32 init_speed; u32 oper_speed; @@ -216,17 +221,21 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) { int err; - if (powered && !dev->clk_enabled) { + if (powered && !dev->res_enabled) { + err = regulator_bulk_enable(BCM_NUM_SUPPLIES, dev->supplies); + if (err) + return err; + /* LPO clock needs to be 32.768 kHz */ err = clk_set_rate(dev->lpo_clk, 32768); if (err) { dev_err(dev->dev, "Could not set LPO clock rate\n"); - return err; + goto err_regulator_disable; } err = clk_prepare_enable(dev->lpo_clk); if (err) - return err; + goto err_regulator_disable; err = clk_prepare_enable(dev->txco_clk); if (err) @@ -241,23 +250,27 @@ static int bcm_gpio_set_power(struct bcm_device *dev, bool powered) if (err) goto err_revert_shutdown; - if (!powered && dev->clk_enabled) { + if (!powered && dev->res_enabled) { clk_disable_unprepare(dev->txco_clk); clk_disable_unprepare(dev->lpo_clk); + regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); } - dev->clk_enabled = powered; + dev->res_enabled = powered; return 0; err_revert_shutdown: dev->set_shutdown(dev, !powered); err_txco_clk_disable: - if (powered && !dev->clk_enabled) + if (powered && !dev->res_enabled) clk_disable_unprepare(dev->txco_clk); err_lpo_clk_disable: - if (powered && !dev->clk_enabled) + if (powered && !dev->res_enabled) clk_disable_unprepare(dev->lpo_clk); +err_regulator_disable: + if (powered && !dev->res_enabled) + regulator_bulk_disable(BCM_NUM_SUPPLIES, dev->supplies); return err; } @@ -936,6 +949,7 @@ static struct clk *bcm_get_txco(struct device *dev) static int bcm_get_resources(struct bcm_device *dev) { const struct dmi_system_id *dmi_id; + int err; dev->name = dev_name(dev->dev); @@ -978,6 +992,13 @@ static int bcm_get_resources(struct bcm_device *dev) dev->set_device_wakeup = bcm_gpio_set_device_wakeup; dev->set_shutdown = bcm_gpio_set_shutdown; + dev->supplies[0].supply = "vbat"; + dev->supplies[1].supply = "vddio"; + err = devm_regulator_bulk_get(dev->dev, BCM_NUM_SUPPLIES, + dev->supplies); + if (err) + return err; + /* IRQ can be declared in ACPI table as Interrupt or GpioInt */ if (dev->irq <= 0) { struct gpio_desc *gpio;