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Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ihsSY-0004nZ-Hv; Thu, 19 Dec 2019 09:51:06 +0000 Received: from mail-sh.amlogic.com ([58.32.228.43]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ihsSV-0004n7-Dq; Thu, 19 Dec 2019 09:51:04 +0000 Received: from [10.18.38.198] (10.18.38.198) by mail-sh.amlogic.com (10.18.11.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1591.10; Thu, 19 Dec 2019 17:51:38 +0800 Subject: Re: [PATCH v2 4/6] usb: dwc3: Add Amlogic A1 DWC3 glue To: Neil Armstrong , Jerome Brunet , Rob Herring , Greg Kroah-Hartman , Felipe Balbi , Kevin Hilman References: <1576636944-196192-1-git-send-email-hanjie.lin@amlogic.com> <1576636944-196192-5-git-send-email-hanjie.lin@amlogic.com> From: Hanjie Lin Message-ID: Date: Thu, 19 Dec 2019 17:51:37 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1 MIME-Version: 1.0 In-Reply-To: Content-Language: en-US X-Originating-IP: [10.18.38.198] X-ClientProxiedBy: mail-sh.amlogic.com (10.18.11.5) To mail-sh.amlogic.com (10.18.11.5) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191219_015103_465249_35B0F0CF X-CRM114-Status: GOOD ( 19.36 ) 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: devicetree@vger.kernel.org, Victor Wan , Jianxin Pan , Stephen Boyd , Michael Turquette , linux-usb@vger.kernel.org, Yue Wang , Martin Blumenstingl , Liang Yang , Qiufang Dai , Xingyu Chen , Carlo Caione , linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Jian Hu 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 2019/12/18 21:23, Neil Armstrong wrote: > Hi, > > On 18/12/2019 03:42, Hanjie Lin wrote: >> Adds support for Amlogic A1 USB Control Glue HW. >> >> The Amlogic A1 SoC Family embeds 1 USB Controllers: >> - a DWC3 IP configured as Host for USB2 and USB3 >> >> A glue connects the controllers to the USB2 PHY of A1 SoC. >> >> Signed-off-by: Hanjie Lin >> Signed-off-by: Yue Wang >> --- >> drivers/usb/dwc3/dwc3-meson-g12a.c | 69 +++++++++++++++++++++++++++----------- >> 1 file changed, 49 insertions(+), 20 deletions(-) >> >> diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c >> index 8a3ec1a..3817daf 100644 >> --- a/drivers/usb/dwc3/dwc3-meson-g12a.c >> +++ b/drivers/usb/dwc3/dwc3-meson-g12a.c >> @@ -107,10 +107,22 @@ static const char *phy_names[PHY_COUNT] = { >> "usb2-phy0", "usb2-phy1", "usb3-phy0", >> }; >> >> +static const struct clk_bulk_data meson_g12a_clocks[] = { >> + { .id = NULL}, >> +}; >> + >> +static const struct clk_bulk_data meson_a1_clocks[] = { >> + { .id = "usb_ctrl"}, >> + { .id = "usb_bus"}, >> + { .id = "xtal_usb_phy"}, >> + { .id = "xtal_usb_ctrl"}, >> +}; >> + >> struct dwc3_meson_g12a { >> struct device *dev; >> struct regmap *regmap; >> - struct clk *clk; >> + struct clk_bulk_data *clks; >> + int num_clks; >> struct reset_control *reset; >> struct phy *phys[PHY_COUNT]; >> enum usb_dr_mode otg_mode; >> @@ -151,7 +163,7 @@ static int dwc3_meson_g12a_usb2_init(struct dwc3_meson_g12a *priv) >> U2P_R0_POWER_ON_RESET, >> U2P_R0_POWER_ON_RESET); >> >> - if (i == USB2_OTG_PHY) { >> + if (i == USB2_OTG_PHY && priv->otg_mode != USB_DR_MODE_HOST) { > > This is wrong for G12A, please use something else to exclude PULLUPP/VBUS to be updated on A1. > Yes, it's a mistake. I will try to fix it in next version. >> regmap_update_bits(priv->regmap, >> U2P_R0 + (U2P_REG_SIZE * i), >> U2P_R0_ID_PULLUP | U2P_R0_DRV_VBUS, >> @@ -295,7 +307,7 @@ static int dwc3_meson_g12a_otg_mode_set(struct dwc3_meson_g12a *priv, >> { >> int ret; >> >> - if (!priv->phys[USB2_OTG_PHY]) >> + if (!priv->phys[USB2_OTG_PHY] || priv->otg_mode == USB_DR_MODE_HOST) > > Same, this is wrong on G12A since a Host port can be switched to device, use something > else to disable this for A1, like setting a "otg_supported" flag into the match data, > and using it in dwc3_meson_g12a_usb2_init(), avoiding registering usb_role_switch, the > IRQ and updating the priv->otg_mode in probe(). > Yes, thanks. >> return -EINVAL; >> >> if (mode == PHY_MODE_USB_HOST) >> @@ -409,17 +421,32 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) >> priv->vbus = NULL; >> } >> >> - priv->clk = devm_clk_get(dev, NULL); >> - if (IS_ERR(priv->clk)) >> - return PTR_ERR(priv->clk); >> + priv->dev = dev; >> + >> + if (of_device_is_compatible(np, "amlogic,meson-g12a-usb-ctrl")) { >> + priv->clks = devm_kmemdup(dev, meson_g12a_clocks, >> + sizeof(meson_g12a_clocks), >> + GFP_KERNEL); >> + priv->num_clks = ARRAY_SIZE(meson_g12a_clocks); >> + } else if (of_device_is_compatible(np, "amlogic,meson-a1-usb-ctrl")) { >> + priv->clks = devm_kmemdup(dev, meson_a1_clocks, >> + sizeof(meson_a1_clocks), >> + GFP_KERNEL); >> + priv->num_clks = ARRAY_SIZE(meson_a1_clocks); >> + } else { >> + return -EINVAL; >> + } > > Like the PHY driver, please use of_device_get_match_data() and a match data for each compatible instead. > OK. >> + >> + if (!priv->clks) >> + return -ENOMEM; >> >> - ret = clk_prepare_enable(priv->clk); >> + ret = devm_clk_bulk_get(dev, priv->num_clks, priv->clks); >> if (ret) >> return ret; >> >> - devm_add_action_or_reset(dev, >> - (void(*)(void *))clk_disable_unprepare, >> - priv->clk); >> + ret = clk_bulk_prepare_enable(priv->num_clks, priv->clks); >> + if (ret) >> + return ret; >> >> platform_set_drvdata(pdev, priv); >> priv->dev = dev; >> @@ -433,16 +460,16 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) >> >> ret = reset_control_reset(priv->reset); >> if (ret) >> - return ret; >> + goto err_disable_clks; >> >> ret = dwc3_meson_g12a_get_phys(priv); >> if (ret) >> - return ret; >> + goto err_disable_clks; >> >> if (priv->vbus) { >> ret = regulator_enable(priv->vbus); >> if (ret) >> - return ret; >> + goto err_disable_clks; >> } >> >> /* Get dr_mode */ >> @@ -458,7 +485,7 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) >> dwc3_meson_g12a_irq_thread, >> IRQF_ONESHOT, pdev->name, priv); >> if (ret) >> - return ret; >> + goto err_disable_clks; >> } >> >> dwc3_meson_g12a_usb_init(priv); >> @@ -467,7 +494,7 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) >> for (i = 0 ; i < PHY_COUNT ; ++i) { >> ret = phy_init(priv->phys[i]); >> if (ret) >> - return ret; >> + goto err_disable_clks; >> } >> >> /* Set PHY Power */ >> @@ -478,10 +505,8 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) >> } >> >> ret = of_platform_populate(np, NULL, NULL, dev); >> - if (ret) { >> - clk_disable_unprepare(priv->clk); >> + if (ret) >> goto err_phys_power; >> - } >> >> /* Setup OTG mode corresponding to the ID pin */ >> if (priv->otg_mode == USB_DR_MODE_OTG) { >> @@ -518,6 +543,9 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev) >> for (i = 0 ; i < PHY_COUNT ; ++i) >> phy_exit(priv->phys[i]); >> >> +err_disable_clks: >> + clk_bulk_disable_unprepare(priv->num_clks, priv->clks); >> + >> return ret; >> } >> >> @@ -547,7 +575,7 @@ static int __maybe_unused dwc3_meson_g12a_runtime_suspend(struct device *dev) >> { >> struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); >> >> - clk_disable(priv->clk); >> + clk_bulk_disable_unprepare(priv->num_clks, priv->clks); >> >> return 0; >> } >> @@ -556,7 +584,7 @@ static int __maybe_unused dwc3_meson_g12a_runtime_resume(struct device *dev) >> { >> struct dwc3_meson_g12a *priv = dev_get_drvdata(dev); >> >> - return clk_enable(priv->clk); >> + return clk_bulk_prepare_enable(priv->num_clks, priv->clks); >> } >> >> static int __maybe_unused dwc3_meson_g12a_suspend(struct device *dev) >> @@ -620,6 +648,7 @@ static const struct dev_pm_ops dwc3_meson_g12a_dev_pm_ops = { >> >> static const struct of_device_id dwc3_meson_g12a_match[] = { >> { .compatible = "amlogic,meson-g12a-usb-ctrl" }, >> + { .compatible = "amlogic,meson-a1-usb-ctrl" }, >> { /* Sentinel */ } >> }; >> MODULE_DEVICE_TABLE(of, dwc3_meson_g12a_match); >> > > > Thanks, > Neil > > . > Thanks, Hanjie.Lin _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic