From patchwork Thu Dec 12 01:42:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11286707 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 39C6014B7 for ; Thu, 12 Dec 2019 01:43:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 183CD2464B for ; Thu, 12 Dec 2019 01:43:11 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="cGOZzqU1" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727504AbfLLBnJ (ORCPT ); Wed, 11 Dec 2019 20:43:09 -0500 Received: from mail-pg1-f195.google.com ([209.85.215.195]:38625 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727631AbfLLBmm (ORCPT ); Wed, 11 Dec 2019 20:42:42 -0500 Received: by mail-pg1-f195.google.com with SMTP id a33so278503pgm.5 for ; Wed, 11 Dec 2019 17:42:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=G6kjJoovlC6cVfetXCubnmxNfzySZyzH70fmpOskqm8=; b=cGOZzqU13JOBPam+xdKigkTIGiAjbtkPvBYtjMIcRGUuLi4JiP7MUinvcn6DCHl3if FfTvBb4dk8U5AMVmF2CjA3dX++wBfx3pTTGhYpwAXjF+gVP7q2lyOJ71aGuUEDGgLDk+ TMnP3JbWjTdAvowKhz6F66lifrsJQu8cJUerpX+PE5lpkYRjgLc7ZYnOaB5FZFDeXZLZ 4XTD82pAK9BsC4PJHfrpswrG46E7SuRpdj1/clKJtXJ/dD0FqdjFwSmynLis5GtK1lV7 /4QvRxBrdkNP0ceSSZ49Ot9qJNQWbR+IUoA7OE66lecnIgheFt5rQQ4O7VaQtW+J/H3+ w9Gw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=G6kjJoovlC6cVfetXCubnmxNfzySZyzH70fmpOskqm8=; b=EVDeDKXdWiljyOzW8VbdPLvsef9lCmcLpsXpJzLAQNbuV0xZW3EC04wSdNfDW3QIrr phDYD9VNhjP1aQ5FV8sJCUnbrgOix8KPkDyzJ2oAuZgV2hVdpsRyCNCzJdk2ZKhJ4Zn1 2itDl9tj4y9CzHj5XfqSfw/liXTBD6I4Ld/LX/afWrBeBHxQPdWL9MWhW2EtE6l+Cw4n //M707/UHuBkRJaqF615omYhn8qJtqldCfHVmBSaPu34OdUIQDruHVfhhA8Qa3OtykMC m8Gj7xQgY/9XtkyRIJVNd2+K/DF3vum2K/s8ZpsRYx+3+5kj2F0fSrwgxNasUotfVWQP Y5fA== X-Gm-Message-State: APjAAAXEMSaI4uuxiWiI45VkX+aG4aPijb9flt3Eey2qNdKrNnhHZQx4 jOKVztvu0YpjGSWsquaAgSuQIg== X-Google-Smtp-Source: APXvYqwpqM70vNZbKae/RwdZ2CYgbgIkvtbmpvMV4ONBua+4aE8gJ9REa97neloI95Wm/o50zRSkzw== X-Received: by 2002:a62:1a97:: with SMTP id a145mr7398556pfa.244.1576114961674; Wed, 11 Dec 2019 17:42:41 -0800 (PST) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id p16sm4217996pgi.50.2019.12.11.17.42.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Dec 2019 17:42:41 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Greg Kroah-Hartman , Rob Herring , Mark Rutland , ShuFan Lee , Heikki Krogerus , Suzuki K Poulose , Chunfeng Yun , Yu Chen , Felipe Balbi , Hans de Goede , Andy Shevchenko , Jun Li , Valentin Schneider , Guillaume Gardet , Jack Pham , linux-usb@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v7 5/8] usb: dwc3: Rework clock initialization to be more flexible Date: Thu, 12 Dec 2019 01:42:30 +0000 Message-Id: <20191212014233.32799-6-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191212014233.32799-1-john.stultz@linaro.org> References: <20191212014233.32799-1-john.stultz@linaro.org> Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org The dwc3 core binding specifies three clocks: ref, bus_early, and suspend which are all controlled in the driver together. However some variants of the hardware my not have all three clks, or some may have more. Usually this was handled by using the dwc3-of-simple glue driver, but that resulted in a proliferation of bindings for for every variant, when the only difference was the clocks and resets lists. So this patch reworks the reading of the clks from the dts to use devm_clk_bulk_get_all() will will fetch all the clocks specified in the dts together. This patch was recommended by Rob Herring as an alternative to creating multiple bindings for each variant of hardware. Cc: Greg Kroah-Hartman Cc: Rob Herring Cc: Mark Rutland CC: ShuFan Lee Cc: Heikki Krogerus Cc: Suzuki K Poulose Cc: Chunfeng Yun Cc: Yu Chen Cc: Felipe Balbi Cc: Hans de Goede Cc: Andy Shevchenko Cc: Jun Li Cc: Valentin Schneider Cc: Guillaume Gardet Cc: Jack Pham Cc: linux-usb@vger.kernel.org Cc: devicetree@vger.kernel.org Suggested-by: Rob Herring Signed-off-by: John Stultz --- v3: Rework dwc3 core rather then adding another dwc-of-simple binding. v6: Re-introduce this patch, on Rob's suggestion --- drivers/usb/dwc3/core.c | 20 +++++--------------- 1 file changed, 5 insertions(+), 15 deletions(-) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index f561c6c9e8a9..c6316d4b7593 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -289,12 +289,6 @@ static int dwc3_core_soft_reset(struct dwc3 *dwc) return 0; } -static const struct clk_bulk_data dwc3_core_clks[] = { - { .id = "ref" }, - { .id = "bus_early" }, - { .id = "suspend" }, -}; - /* * dwc3_frame_length_adjustment - Adjusts frame length if required * @dwc3: Pointer to our controller context structure @@ -1438,11 +1432,6 @@ static int dwc3_probe(struct platform_device *pdev) if (!dwc) return -ENOMEM; - dwc->clks = devm_kmemdup(dev, dwc3_core_clks, sizeof(dwc3_core_clks), - GFP_KERNEL); - if (!dwc->clks) - return -ENOMEM; - dwc->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -1478,17 +1467,18 @@ static int dwc3_probe(struct platform_device *pdev) return PTR_ERR(dwc->reset); if (dev->of_node) { - dwc->num_clks = ARRAY_SIZE(dwc3_core_clks); - - ret = devm_clk_bulk_get(dev, dwc->num_clks, dwc->clks); + ret = devm_clk_bulk_get_all(dev, &dwc->clks); if (ret == -EPROBE_DEFER) return ret; /* * Clocks are optional, but new DT platforms should support all * clocks as required by the DT-binding. */ - if (ret) + if (ret < 0) dwc->num_clks = 0; + else + dwc->num_clks = ret; + } ret = reset_control_deassert(dwc->reset);