From patchwork Mon Dec 17 04:04:43 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: 10732727 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 47F676C5 for ; Mon, 17 Dec 2018 04:08:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 32FD929648 for ; Mon, 17 Dec 2018 04:08:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 20DA129727; Mon, 17 Dec 2018 04:08:39 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED 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 8206428508 for ; Mon, 17 Dec 2018 04:08:38 +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=6DoILinsiIfXQI3V7gkpFo48UhMqpqqI7y7CL1E7A8E=; b=Eg6bvMtVzZZmVa g6vHU2FyfhclNMfsLnRyq9zcgSVyggOO5OuwzlAwsSacCCXKgFCxnUKInQ5IFnT/ljOwhidAf7BRz FSzkaWbJoOOhj8WuFy4WwHb99S//E38sC1+X9oLV9BqCOfpRDCv+e56LXb5Ov5XYSWUojrdAD+w7y ggNjXN6g0Mu4nIUsIqpFMgCytrnDpqPqWKp5A9zwQA/t8DhsSWqvB0Dg7F3H5HIF0WTQa0+QjSUqI s4SOtNV5k7NXhuy9JNWN08nWe6CVvVjgxT9AOMt2E7ytiK3Ua0fs0HrhA84dLvcLcvM8fp7rZutx1 gFW/HI8eSmZWxKGKdTaA==; 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 1gYkCm-0003CE-Iv; Mon, 17 Dec 2018 04:08:32 +0000 Received: from mirror2.csie.ntu.edu.tw ([140.112.30.76] helo=wens.csie.org) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gYk9v-0000Hn-9o for linux-arm-kernel@lists.infradead.org; Mon, 17 Dec 2018 04:05:46 +0000 Received: by wens.csie.org (Postfix, from userid 1000) id 7C5745FDAF; Mon, 17 Dec 2018 12:05:03 +0800 (CST) From: Chen-Yu Tsai To: Marcel Holtmann , Johan Hedberg , Rob Herring , Mark Rutland , Maxime Ripard Subject: [PATCH v3 09/15] Bluetooth: hci_bcm: Add support for regulator supplies Date: Mon, 17 Dec 2018 12:04:43 +0800 Message-Id: <20181217040449.31437-10-wens@csie.org> X-Mailer: git-send-email 2.20.0 In-Reply-To: <20181217040449.31437-1-wens@csie.org> References: <20181217040449.31437-1-wens@csie.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181216_200537_267000_8C0BFF93 X-CRM114-Status: GOOD ( 17.44 ) 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: Ondrej Jirman , 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. Tested-by: Ondrej Jirman 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;