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[23.128.96.18]) by mx.google.com with ESMTP id x6si1945396ilv.42.2021.08.27.11.59.41; Fri, 27 Aug 2021 11:59:52 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=oGwTmpZv; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231131AbhH0S6u (ORCPT + 99 others); Fri, 27 Aug 2021 14:58:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230284AbhH0S6t (ORCPT ); Fri, 27 Aug 2021 14:58:49 -0400 Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9D4F8C061757; Fri, 27 Aug 2021 11:58:00 -0700 (PDT) Received: by mail-ej1-x636.google.com with SMTP id x11so16038008ejv.0; Fri, 27 Aug 2021 11:58:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=pFgF/5yzy8h/uQFvUpdFC8Vraw1yd6xUZU7Dag6hLSI=; b=oGwTmpZvNFI0ClOuczO7mD72azHgn5pORuZzoy5WZJ5awI1Z8ek+8eziGsqBlsEAzI B5c9aXmt9S+RmWrb6i22fwzsCs5S+2UFPetrJ9nfO3usGqRt+HAJTzY0jCPi42x4nuQd gXPKjW84VACZ7QymK38tiYwJMFW9HCwsbKc9RDjzCvY5P6tRRwBSaicIJq2bXgdfdU5v +CImNQ5JpHS0uZ4gjdKe0mJzs6adzchFLAQJwHvCzJjiBdSzY0ZYoA8RXvGn28Klaxit xIS5aaLfzDTuhUkunysnhRQ3u0rwHCJI2dUNv9hM7Teq5XdjV8B2LtWrBq8uIe5qYY3w 5E0Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=pFgF/5yzy8h/uQFvUpdFC8Vraw1yd6xUZU7Dag6hLSI=; b=eZKFWJ9FmKTWOXbEL+LhOLS8jkydqfzw496GoLY+pBPgx0JOz2HLFRb+315e8DosCU fiOGO4/uLmHXc8oSvUnbBRRRJ69JnN/mDVA5mI1kAEBq2UHnKWvy4YOAQOQuMw+JUl2A g9qmU4xfZ1gzuwKR5bsdf5g+vQsV7rmR4e/bb88vwPWVy2C8kLDB8kCGOgGihQJWZ/Ff xbYhmjvvcoum/dae725sABHDlxNBBxJDgrcFKZRtEQ06GSGbFW1ir33OYBDDFIshDThp kr0pP+g8X0fydriDKS7qXOsMaVZTO1yCXgbtDsIXHHWnSAiNJGVY+Tc7G3D8dA9UIYTL lztg== X-Gm-Message-State: AOAM532lqwFNdW9MmZ/vnrk/HJskcJ8UDd6b+LN5YEK2eTJfsZnGDGS8 1NG+6owDnahhmPd7FW7aW3JOOIpBjKJ2CaOJp4J9voiK3DcWnw== X-Received: by 2002:a17:906:93ef:: with SMTP id yl15mr11692083ejb.229.1630090678983; Fri, 27 Aug 2021 11:57:58 -0700 (PDT) MIME-Version: 1.0 References: <20210630173042.186394-1-aford173@gmail.com> <20210630173042.186394-2-aford173@gmail.com> In-Reply-To: From: Adam Ford Date: Fri, 27 Aug 2021 13:57:48 -0500 Message-ID: Subject: Re: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks To: Yoshihiro Shimoda Cc: Geert Uytterhoeven , USB list , Adam Ford-BE , Greg Kroah-Hartman , Rob Herring , Magnus Damm , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Linux Kernel Mailing List , Linux-Renesas Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 1, 2021 at 6:34 AM Yoshihiro Shimoda wrote: > > Hi Adam, Geert-san, > > > From: Geert Uytterhoeven, Sent: Thursday, July 1, 2021 6:07 PM > > > To: Adam Ford > > Cc: USB list ; Adam Ford-BE ; Greg Kroah-Hartman > > ; Rob Herring ; Magnus Damm ; Yoshihiro Shimoda > > ; open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS > > ; Linux Kernel Mailing List ; Linux-Renesas > > > > Subject: Re: [PATCH 2/3] usb: renesas_usbhs: Enable support for more than two clks > > > > Hi Adam, > > > > Thanks for your patch! > > > > On Wed, Jun 30, 2021 at 7:30 PM Adam Ford wrote: > > > > diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c > > > index 3af91b2b8f76..255e4bd68ed3 100644 > > > --- a/drivers/usb/renesas_usbhs/common.c > > > +++ b/drivers/usb/renesas_usbhs/common.c > > > > @@ -309,11 +311,13 @@ static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) > > > * To backward compatibility with old DT, this driver checks the return > > > * value if it's -ENOENT or not. > > > */ > > > - priv->clks[1] = of_clk_get(dev_of_node(dev), 1); > > > - if (PTR_ERR(priv->clks[1]) == -ENOENT) > > > - priv->clks[1] = NULL; > > > - else if (IS_ERR(priv->clks[1])) > > > - return PTR_ERR(priv->clks[1]); > > > + for (i = 1; i < ARRAY_SIZE(priv->clks); i++) { > > > + priv->clks[1] = of_clk_get(dev->of_node, i); > > s/clks[1]/[i]/ > > > > + if (PTR_ERR(priv->clks[i]) == -ENOENT) > > > + priv->clks[i] = NULL; > > > + else if (IS_ERR(priv->clks[i])) > > > + return PTR_ERR(priv->clks[i]); > > > + } > > > > This is identical to the current code, as ARRAY_SIZE(priv->clks) == 2. > > Probably you wanted to increase usbhs_priv.clks[], too? Thanks for the review. Sorry for my delayed response. I broke my wrist on the evening on June 30, and I was on medical leave for 6 weeks. I am now trying to get caught up to where I was. > > I think so. > # I realized the clks array is only 2, so that this driver cannot > # enable usb2_clksel... > > > Does it make sense to start using the clk_bulk*() API? > > clk_bulk*() API seems to need clock-names property. > Is my understanding correct? However, the hsusb nodes doesn't > have the property for now... The usb2_clksel has the names "ehci_ohci" and "hs-usb-if" for <&cpg CPG_MOD 703> and <&cpg CPG_MOD 704>, respectively. What if I add the clock-names property, then switch to the clk_bulk IO? I think we can just turn them all on together if that's acceptable adam > > Best regards, > Yoshihiro Shimoda >