From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0CC5DC49ED7 for ; Mon, 16 Sep 2019 13:23:34 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D16E4214D9 for ; Mon, 16 Sep 2019 13:23:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="LBx543zN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D16E4214D9 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org 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:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4BA4rmBehO254v3OAqmu1vtm5QRQhHD+7BGTG7rw0G8=; b=LBx543zNt5QQBv 3Y2ECKxh3J69c5jaNuvZ8ZBlCEsT8ICweu3pd9jfz02Kr14hPVSL6vF3e5eW3t05HKWkcUSiOldmE MBshgDUgwqDvcmZjBVXcSMhqSWw0dfnUMGQOZFxn+j087/5SxMUhCKUrMV+XadG//gOp46CCJEFY+ kyt1s+mNxezEDJZomppTeW/7Pfum04KrvRcdZvNfDezuzf9KXT0mkrHblpu8697tTMXk2Cb5J4IKE D19Cac2wj6HCwic/ShFi/ohYGX7aZYQz/8mExA+8AvX8yPdDpGc+ggPVxAo/rvUjUmdJW/Ds1nnTj tN23o7xBGrTz6Q0WthGg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i9qyW-0000VH-8c; Mon, 16 Sep 2019 13:23:28 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1i9qyT-0000UT-Mm; Mon, 16 Sep 2019 13:23:27 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D3B7E337; Mon, 16 Sep 2019 06:23:21 -0700 (PDT) Received: from localhost (unknown [10.37.6.20]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4A9C53F67D; Mon, 16 Sep 2019 06:23:21 -0700 (PDT) Date: Mon, 16 Sep 2019 14:23:19 +0100 From: Andrew Murray To: Neil Armstrong Subject: Re: [PATCH v2 4/6] phy: meson-g12a-usb3-pcie: Add support for PCIe mode Message-ID: <20190916132319.GQ9720@e119886-lin.cambridge.arm.com> References: <20190916125022.10754-1-narmstrong@baylibre.com> <20190916125022.10754-5-narmstrong@baylibre.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190916125022.10754-5-narmstrong@baylibre.com> User-Agent: Mutt/1.10.1+81 (426a6c1) (2018-08-26) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190916_062325_835291_A35C6149 X-CRM114-Status: GOOD ( 19.51 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: maz@kernel.org, lorenzo.pieralisi@arm.com, gouwa@khadas.com, khilman@baylibre.com, nick@khadas.com, linux-kernel@vger.kernel.org, kishon@ti.com, repk@triplefau.lt, linux-pci@vger.kernel.org, bhelgaas@google.com, linux-amlogic@lists.infradead.org, yue.wang@Amlogic.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org On Mon, Sep 16, 2019 at 02:50:20PM +0200, Neil Armstrong wrote: > This adds extended PCIe PHY functions for the Amlogic G12A > USB3+PCIE Combo PHY to support reset, power_on and power_off for > PCIe exclusively. > > With these callbacks, we can handle all the needed operations of the > Amlogic PCIe controller driver. > > Signed-off-by: Neil Armstrong > --- > .../phy/amlogic/phy-meson-g12a-usb3-pcie.c | 70 ++++++++++++++++--- > 1 file changed, 61 insertions(+), 9 deletions(-) > > diff --git a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c > index ac322d643c7a..08e322789e59 100644 > --- a/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c > +++ b/drivers/phy/amlogic/phy-meson-g12a-usb3-pcie.c > @@ -50,6 +50,8 @@ > #define PHY_R5_PHY_CR_ACK BIT(16) > #define PHY_R5_PHY_BS_OUT BIT(17) > > +#define PCIE_RESET_DELAY 500 > + > struct phy_g12a_usb3_pcie_priv { > struct regmap *regmap; > struct regmap *regmap_cr; > @@ -196,6 +198,10 @@ static int phy_g12a_usb3_init(struct phy *phy) > struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > int data, ret; > > + ret = reset_control_reset(priv->reset); > + if (ret) > + return ret; Reviewed-by: Andrew Murray > + > /* Switch PHY to USB3 */ > /* TODO figure out how to handle when PCIe was set in the bootloader */ > regmap_update_bits(priv->regmap, PHY_R0, > @@ -272,24 +278,64 @@ static int phy_g12a_usb3_init(struct phy *phy) > return 0; > } > > -static int phy_g12a_usb3_pcie_init(struct phy *phy) > +static int phy_g12a_usb3_pcie_power_on(struct phy *phy) > +{ > + struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > + > + if (priv->mode == PHY_TYPE_USB3) > + return 0; > + > + regmap_update_bits(priv->regmap, PHY_R0, > + PHY_R0_PCIE_POWER_STATE, > + FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1c)); > + > + return 0; > +} > + > +static int phy_g12a_usb3_pcie_power_off(struct phy *phy) > +{ > + struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > + > + if (priv->mode == PHY_TYPE_USB3) > + return 0; > + > + regmap_update_bits(priv->regmap, PHY_R0, > + PHY_R0_PCIE_POWER_STATE, > + FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1d)); > + > + return 0; > +} > + > +static int phy_g12a_usb3_pcie_reset(struct phy *phy) > { > struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > int ret; > > - ret = reset_control_reset(priv->reset); > + if (priv->mode == PHY_TYPE_USB3) > + return 0; > + > + ret = reset_control_assert(priv->reset); > if (ret) > return ret; > > + udelay(PCIE_RESET_DELAY); > + > + ret = reset_control_deassert(priv->reset); > + if (ret) > + return ret; > + > + udelay(PCIE_RESET_DELAY); > + > + return 0; > +} > + > +static int phy_g12a_usb3_pcie_init(struct phy *phy) > +{ > + struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > + > if (priv->mode == PHY_TYPE_USB3) > return phy_g12a_usb3_init(phy); > > - /* Power UP PCIE */ > - /* TODO figure out when the bootloader has set USB3 mode before */ > - regmap_update_bits(priv->regmap, PHY_R0, > - PHY_R0_PCIE_POWER_STATE, > - FIELD_PREP(PHY_R0_PCIE_POWER_STATE, 0x1c)); > - > return 0; > } > > @@ -297,7 +343,10 @@ static int phy_g12a_usb3_pcie_exit(struct phy *phy) > { > struct phy_g12a_usb3_pcie_priv *priv = phy_get_drvdata(phy); > > - return reset_control_reset(priv->reset); > + if (priv->mode == PHY_TYPE_USB3) > + return reset_control_reset(priv->reset); > + > + return 0; > } > > static struct phy *phy_g12a_usb3_pcie_xlate(struct device *dev, > @@ -326,6 +375,9 @@ static struct phy *phy_g12a_usb3_pcie_xlate(struct device *dev, > static const struct phy_ops phy_g12a_usb3_pcie_ops = { > .init = phy_g12a_usb3_pcie_init, > .exit = phy_g12a_usb3_pcie_exit, > + .power_on = phy_g12a_usb3_pcie_power_on, > + .power_off = phy_g12a_usb3_pcie_power_off, > + .reset = phy_g12a_usb3_pcie_reset, > .owner = THIS_MODULE, > }; > > -- > 2.22.0 > _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic