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a=openpgp; fpr=412165D44C9F52780FAB1058D25A6BD3BE763093 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792045193495311392 X-GMAIL-MSGID: 1792045193495311392 As runtime PM is enabled, the module can be runtime suspended when .remove() is called. Do a pm_runtime_get_sync() to make sure module is active before doing any register operations. Doing a pm_runtime_put_sync() should disable the refclk so no need to disable it again. Fixes the below warning at module removel. [ 39.705310] ------------[ cut here ]------------ [ 39.710004] clk:162:3 already disabled [ 39.713941] WARNING: CPU: 0 PID: 921 at drivers/clk/clk.c:1090 clk_core_disable+0xb0/0xb8 We called of_platform_populate() in .probe() so call the cleanup function of_platform_depopulate() in .remove(). Get rid of the now unnnecessary dwc3_ti_remove_core(). Without this, module re-load doesn't work properly. Fixes: e8784c0aec03 ("drivers: usb: dwc3: Add AM62 USB wrapper driver") Cc: # v5.19+ Signed-off-by: Roger Quadros --- Changelog: v4: - added Fixes and Cc stable. - added of_platform_depopulate() changes here. - drop wakeup disable code. v3: no change v2: no change --- drivers/usb/dwc3/dwc3-am62.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index 90a587bc29b7..f85603b7f7c5 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -267,21 +267,14 @@ static int dwc3_ti_probe(struct platform_device *pdev) return ret; } -static int dwc3_ti_remove_core(struct device *dev, void *c) -{ - struct platform_device *pdev = to_platform_device(dev); - - platform_device_unregister(pdev); - return 0; -} - static void dwc3_ti_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct dwc3_am62 *am62 = platform_get_drvdata(pdev); u32 reg; - device_for_each_child(dev, NULL, dwc3_ti_remove_core); + pm_runtime_get_sync(dev); + of_platform_depopulate(dev); /* Clear mode valid bit */ reg = dwc3_ti_readl(am62, USBSS_MODE_CONTROL); @@ -289,7 +282,6 @@ static void dwc3_ti_remove(struct platform_device *pdev) dwc3_ti_writel(am62, USBSS_MODE_CONTROL, reg); pm_runtime_put_sync(dev); - clk_disable_unprepare(am62->usb2_refclk); pm_runtime_disable(dev); pm_runtime_set_suspended(dev); } From patchwork Tue Feb 27 09:23:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 207104 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2583071dyb; Tue, 27 Feb 2024 01:25:37 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCUX6Z4bteklzpXvn+7df+7jizQhvifaeyrwBkfy9FnEAX2JeHgzyGl+0OnvAfQUzUfkrY2rIyEDVunaFV2B2+0rxaLsww== X-Google-Smtp-Source: AGHT+IF5C+9Uc3kzr+8tZKUJ0x9oz7h6YyCchCbIsKv1en8GOG5smonKNZN0fmjiSWPRBXP+o0jL X-Received: by 2002:ad4:4ee9:0:b0:690:1829:3890 with SMTP id dv9-20020ad44ee9000000b0069018293890mr2229108qvb.23.1709025936948; Tue, 27 Feb 2024 01:25:36 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709025936; cv=pass; d=google.com; s=arc-20160816; b=xa4Q85mR+kYZTjVqaAk9UQYtn4WgfAmzdNspeI77q8MpljyQnlKZbLoJCRnuTtHpkm H3JUsou8rG86gu3eUKt6bvfkbw5yGz/wMjj29qzaQZwYo5cpGEtMsS0mGMfpPkS9i3tl ZvF9pefsgKuHs6exxycPPzk3CG6h3bMLjB3DpuCeNOjSDJIiKErRe6mqFaYKX2IfSkIn jeHjYQsqMR2BbvukdzO8vk8HR1FplOWvhW+sxCp2vk1eX6msICH2TV59QemNr9CDvRb1 N/aQNMWa34CMSHdeiAgrUn1E6ACD3fMfNSevlfVIJf0tKG/+7IEPC3/qoSXXjKJdBN0G COkg== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:list-unsubscribe:list-subscribe:list-id:precedence :subject:date:from:dkim-signature; bh=rY9Sk0TDWfPzB5ISEHQlh6kwVRPJpinY7eCVxTMEe5s=; fh=4zgHJ5dc3SsIU4P0mBz39mBAv9tVQtZTJhQgfwLPoRY=; b=xVg75wOC9qvSjvhNfw3tD22x4UCzAW1Go8HRHOFrNCqeNmMLRNeLY69gnKDD/iNwui jXXUra8+dfpEtkMnWf6aPX6ux33Opx8OyZegF+YC6wNb9labNSLKTXnL01SZr9N7G7VS fYyXOSuUyJZBiQAjyctWvN3xkZbvMujw4XJ2E2Xw/gS8X1tdMITXQSld8pc24ayAzdcX ojlmKaDr92swKMj1D/lIg8BEawTHpGM5KvMnaXKz4O+W1BIeQOnA2UyPeOWE5VqKcVbE jF6TU0ngAmm7/jGka/9gowkzcTEziPKym9DyrXVK5ckSTmnE4vCDJ1XR7ax9VWiNSxdQ BI2A==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=nQvw8YpI; arc=pass (i=1 dkim=pass dkdomain=kernel.org); spf=pass (google.com: domain of linux-kernel+bounces-82951-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) smtp.mailfrom="linux-kernel+bounces-82951-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. 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a=openpgp; fpr=412165D44C9F52780FAB1058D25A6BD3BE763093 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792043581114215840 X-GMAIL-MSGID: 1792043581114215840 Disable wakeup at remove. Fixes the below warnings on module unload and reload. > dwc3-am62 f900000.dwc3-usb: couldn't enable device as a wakeup source: -17 > dwc3-am62 f910000.dwc3-usb: couldn't enable device as a wakeup source: -17 Fixes: 4e3972b589da ("usb: dwc3-am62: Enable as a wakeup source by default") Cc: # v6.4+ Signed-off-by: Roger Quadros --- Changelog: v4 - new patch. split out from v3 patch 2. --- drivers/usb/dwc3/dwc3-am62.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index f85603b7f7c5..ea6e29091c0c 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -274,6 +274,7 @@ static void dwc3_ti_remove(struct platform_device *pdev) u32 reg; pm_runtime_get_sync(dev); + device_init_wakeup(dev, false); of_platform_depopulate(dev); /* Clear mode valid bit */ From patchwork Tue Feb 27 09:23:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 207105 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2583154dyb; Tue, 27 Feb 2024 01:25:55 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCX/ynYU29qtpe11h4g/BhKEKQL7jS/TztAxRrZ8H3yVAzX3sctDY+0jDIm1fkb4mhg7TIHppKDf+Evs/9NtB34YZhaetw== X-Google-Smtp-Source: AGHT+IHvKMT1FjdjOtH6FwjUsRBmxVUKDhNRrPI5hTfJXMvl3dbIJ4ceQXraV3x7eC6/ZX/GqdUA X-Received: by 2002:a05:6402:345a:b0:565:6e57:fa3d with SMTP id l26-20020a056402345a00b005656e57fa3dmr6453742edc.10.1709025955278; Tue, 27 Feb 2024 01:25:55 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709025955; cv=pass; d=google.com; s=arc-20160816; b=tiVMa+ekFifhJ07Ap3kh5YHgFsU+hBwoZasOLJyw2TLDJy+PW1/vce2C0bVbYtaJzb bkc5c5wIjgQeVOdrDJIbn63aORWe7ZMBq82DtE4uMAfixF3kNjKBqjtEqDdcGRlAdnxb D7YVjCVf1RDbUf9MZ0A6aUnHUDeQunUYZrJ4KWFDtYnWYVMruBI17yNaGdZVa72jZf7w I/48DP7RO3R8yAtVcs3v+xskJ3mf0I9mgtPLYoJCvr7WmBQxymYOgmUGYXz12G/QwPWX 7Pa+F9BHI9BDBzFzGaInWxPnJntzEiJxt2TFPA1PhK5QxnBJ/C/eDeC/9zyIjTVw3CbJ S5Vw== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:list-unsubscribe:list-subscribe:list-id:precedence :subject:date:from:dkim-signature; bh=d85wjCPKsPTz3Rza4pjG33gtaXBRNDc7tb5vEW/wB4s=; fh=zNuDOsvoR+8aICeqYSghaRjPRQ4KSmjT7toszJtY6lw=; b=CZ2+47lqq4I9S9f5a2ltA/7nW45Kspe2P8SPij3xBW/Y433ldErC5FyRd3r6jZh+Ea FyosqZMAj1Sabm0qhURYXbdXbDO0LKVQ/4s+C9pqPiPe6wOa2zR4ja0OZqe4+I4gLn1P jlISAVfBT4gfY5hMm7pS7DZDFmuu/sVDRbcacE7G0An82aKZ9neQO0HZoFvr4vyhdDJy dJPbZo/O2nPN/HR9X32sQ5cvyuFmNgSvLMoJponstaIgRIPBgkwFd3qTFQ/66hFQIiL7 DFCxvJJ8JUSbgrsWhbnCZtmebmRCJQ3ETWq+Z9F2ai2ltErMpZqyqbUoAw6dru0jWTOU eoDg==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b="KEuAl/gf"; arc=pass (i=1 dkim=pass dkdomain=kernel.org); spf=pass (google.com: domain of linux-kernel+bounces-82952-ouuuleilei=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-kernel+bounces-82952-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from am.mirrors.kernel.org (am.mirrors.kernel.org. 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a=openpgp; fpr=412165D44C9F52780FAB1058D25A6BD3BE763093 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792043599770796637 X-GMAIL-MSGID: 1792043599770796637 TRM information is outdated and design team has confirmed that PHY_CORE_VOLTAGE should be 0 irrespective of VDD_CORE voltage. Signed-off-by: Roger Quadros Acked-by: Thinh Nguyen --- Changelog: v4: Added Acked-by v3: no change v2: no change v1: https://lore.kernel.org/all/20240201121220.5523-4-rogerq@kernel.org/ --- drivers/usb/dwc3/dwc3-am62.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index ea6e29091c0c..09b1f5a1c4fb 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -97,7 +97,8 @@ #define USBSS_VBUS_STAT_SESSVALID BIT(2) #define USBSS_VBUS_STAT_VBUSVALID BIT(0) -/* Mask for PHY PLL REFCLK */ +/* USB_PHY_CTRL register bits in CTRL_MMR */ +#define PHY_CORE_VOLTAGE_MASK BIT(31) #define PHY_PLL_REFCLK_MASK GENMASK(3, 0) #define DWC3_AM62_AUTOSUSPEND_DELAY 100 @@ -162,6 +163,13 @@ static int phy_syscon_pll_refclk(struct dwc3_am62 *am62) am62->offset = args.args[0]; + /* Core voltage. PHY_CORE_VOLTAGE bit Recommended to be 0 always */ + ret = regmap_update_bits(am62->syscon, am62->offset, PHY_CORE_VOLTAGE_MASK, 0); + if (ret) { + dev_err(dev, "failed to set phy core voltage\n"); + return ret; + } + ret = regmap_update_bits(am62->syscon, am62->offset, PHY_PLL_REFCLK_MASK, am62->rate_code); if (ret) { dev_err(dev, "failed to set phy pll reference clock rate\n"); From patchwork Tue Feb 27 09:23:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 207112 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:a81b:b0:108:e6aa:91d0 with SMTP id bq27csp2590669dyb; Tue, 27 Feb 2024 01:47:20 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCX1Ae8zMbiIXhgRpnxbFOSLl370+f5HD2oRc/lL4TENWBTHCq4EH1LRKj/JM7CvFIbbUac0wqYMWSl7mWmFrSKE03owuQ== X-Google-Smtp-Source: AGHT+IGkvndChqUsLtqTOJGkdQnqx9NbpIACbBuF+jNbZ6y5RcpDhFisGTyFdLLJCW7KiP/ugBYT X-Received: by 2002:a05:6808:640b:b0:3c1:9433:5362 with SMTP id fg11-20020a056808640b00b003c194335362mr1644833oib.2.1709027240702; Tue, 27 Feb 2024 01:47:20 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1709027240; cv=pass; d=google.com; s=arc-20160816; b=T7j2aUWh6J4NgnlMIFf8Dz72fYp0PX1rKUSO16YTAcfZHUQdeHS6UOKvUMdMXuk9td sLl7o/0ZyFHYySZICc3k/JfU+lfNIP5KFyKvz4dIvCNCONuscclZrQgeLAVaPt4gb/a/ J237vh2e3DVk/9D1ACVj+VneTpSKOb4/pLs2FLYPUyYnj/MwSZyLakQvh7YmGh6hyfyQ 1UputUJEk/43Lpp1SEl+YP5YRwk2xk9XOjJPw0r7UQGQNd4pTUXogmnMXazXxas3F0Se aUYqK+TAOtu5rxJ5H1kHg6wUlrbva/vLEvmd+TiSb8Y2X2tOVi/aTYwDDoR8fAkJMJWb v57w== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:list-unsubscribe:list-subscribe:list-id:precedence :subject:date:from:dkim-signature; bh=YwJcbc1do1O5HokflFmbz7zYUrM1K0Ne0PWw8Kt8eeg=; fh=zNuDOsvoR+8aICeqYSghaRjPRQ4KSmjT7toszJtY6lw=; b=mxDM/ytdaB/Dj9idpeG7u0n4ked53jBAeqgh3LqEfsLLcGta9yYuzzTU+jy5l3dYpn cfw8rkUkjvSMU2iEecln2sEvl+okx/c7FxkTB5BmdWe1hlgSYe+0jRlYM6iOQ50Jj+iD n/7v45r5tSu3e4aexkjFzufGPETC24gI6/FwpPYS1m46JRkKBDIuDG5uFHG+SlhVFJwh EHy9FsIDAePtUL31ZLMFFyZioCGJ6Zc6yqu/NH+lvkU11RJ/U0iJzjV/hryOjyx5R7un 1QcPabuQtwkNpMQbx2H7Hpui3x+m1LKS72ySnOf4aUZbTBBfWbJukeYjFOvmEOFkt1U0 SMqA==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=MlJQJE9S; arc=pass (i=1 dkim=pass dkdomain=kernel.org); spf=pass (google.com: domain of linux-kernel+bounces-82953-ouuuleilei=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) smtp.mailfrom="linux-kernel+bounces-82953-ouuuleilei=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. 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a=openpgp; fpr=412165D44C9F52780FAB1058D25A6BD3BE763093 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792044947992078792 X-GMAIL-MSGID: 1792044947992078792 All AM62 devices have Errata i2409 [1] due to which USB2 PHY may lock up due to short suspend. Workaround involves setting bit 5 and 4 PLL_REG12 in PHY2 register space after USB controller is brought out of LPSC reset but before controller initialization. Handle this workaround. [1] - https://www.ti.com/lit/er/sprz487d/sprz487d.pdf Signed-off-by: Roger Quadros Acked-by: Thinh Nguyen --- Changelog: v4: Added Acked-by v3: move requesting of PHY2 region to right where we need it v2: don't add phy read/write helpers or add phy to private data v1: https://lore.kernel.org/all/20240201121220.5523-5-rogerq@kernel.org/ --- drivers/usb/dwc3/dwc3-am62.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/dwc3-am62.c b/drivers/usb/dwc3/dwc3-am62.c index 09b1f5a1c4fb..fad151e78fd6 100644 --- a/drivers/usb/dwc3/dwc3-am62.c +++ b/drivers/usb/dwc3/dwc3-am62.c @@ -101,6 +101,11 @@ #define PHY_CORE_VOLTAGE_MASK BIT(31) #define PHY_PLL_REFCLK_MASK GENMASK(3, 0) +/* USB PHY2 register offsets */ +#define USB_PHY_PLL_REG12 0x130 +#define USB_PHY_PLL_LDO_REF_EN BIT(5) +#define USB_PHY_PLL_LDO_REF_EN_EN BIT(4) + #define DWC3_AM62_AUTOSUSPEND_DELAY 100 struct dwc3_am62 { @@ -184,8 +189,9 @@ static int dwc3_ti_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *node = pdev->dev.of_node; struct dwc3_am62 *am62; - int i, ret; unsigned long rate; + void __iomem *phy; + int i, ret; u32 reg; am62 = devm_kzalloc(dev, sizeof(*am62), GFP_KERNEL); @@ -227,6 +233,17 @@ static int dwc3_ti_probe(struct platform_device *pdev) if (ret) return ret; + /* Workaround Errata i2409 */ + phy = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(phy)) { + dev_err(dev, "can't map PHY IOMEM resource. Won't apply i2409 fix.\n"); + phy = NULL; + } else { + reg = readl(phy + USB_PHY_PLL_REG12); + reg |= USB_PHY_PLL_LDO_REF_EN | USB_PHY_PLL_LDO_REF_EN_EN; + writel(reg, phy + USB_PHY_PLL_REG12); + } + /* VBUS divider select */ am62->vbus_divider = device_property_read_bool(dev, "ti,vbus-divider"); reg = dwc3_ti_readl(am62, USBSS_PHY_CONFIG);