From patchwork Thu Feb 27 10:42:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marco Felsch X-Patchwork-Id: 11408265 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 4FE1213A4 for ; Thu, 27 Feb 2020 10:42:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 38A3F24690 for ; Thu, 27 Feb 2020 10:42:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728850AbgB0KmU (ORCPT ); Thu, 27 Feb 2020 05:42:20 -0500 Received: from metis.ext.pengutronix.de ([85.220.165.71]:48845 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728846AbgB0KmU (ORCPT ); Thu, 27 Feb 2020 05:42:20 -0500 Received: from dude02.hi.pengutronix.de ([2001:67c:670:100:1d::28] helo=dude02.lab.pengutronix.de) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1j7GcR-0003f7-Ay; Thu, 27 Feb 2020 11:42:15 +0100 Received: from mfe by dude02.lab.pengutronix.de with local (Exim 4.92) (envelope-from ) id 1j7GcP-0004nu-6A; Thu, 27 Feb 2020 11:42:13 +0100 From: Marco Felsch To: Peter.Chen@nxp.com, gregkh@linuxfoundation.org, shawnguo@kernel.org, linux-imx@nxp.com, stern@rowland.harvard.edu, jun.li@freescale.com Cc: linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de Subject: [PATCH 2/3] Partially Revert "usb: chipidea: host: turn on vbus before add hcd if early vbus on is required" Date: Thu, 27 Feb 2020 11:42:11 +0100 Message-Id: <20200227104212.12562-3-m.felsch@pengutronix.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200227104212.12562-1-m.felsch@pengutronix.de> References: <20200227104212.12562-1-m.felsch@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::28 X-SA-Exim-Mail-From: mfe@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-usb@vger.kernel.org Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Commit 659459174188 ("usb: chipidea: host: turn on vbus before add hcd if early vbus on is required") enabled the vbus regulator but didn't assign the reg_vbus. So the vbus regulator can't be disabled anymore. Since the port_power() callback is executed exclusive (without enabling the port power (PP) bit) we can do the special handling within the callback without the need of a special flag. Signed-off-by: Marco Felsch --- drivers/usb/chipidea/host.c | 31 ++++++++++--------------------- 1 file changed, 10 insertions(+), 21 deletions(-) diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c index 48e4a5ca1835..f1832847a023 100644 --- a/drivers/usb/chipidea/host.c +++ b/drivers/usb/chipidea/host.c @@ -37,6 +37,8 @@ static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable) struct ci_hdrc *ci = dev_get_drvdata(dev); int ret = 0; int port = HCS_N_PORTS(ehci->hcs_params); + u32 __iomem *status_reg = &ehci->regs->port_status[portnum]; + u32 temp = ehci_readl(ehci, status_reg) & ~PORT_RWC_BITS; if (priv->reg_vbus && enable != priv->enabled) { if (port > 1) { @@ -57,6 +59,11 @@ static int ehci_ci_portpower(struct usb_hcd *hcd, int portnum, bool enable) priv->enabled = enable; } + if (enable) + ehci_writel(ehci, temp | PORT_POWER, status_reg); + else + ehci_writel(ehci, temp & ~PORT_POWER, status_reg); + if (enable && (ci->platdata->phy_mode == USBPHY_INTERFACE_MODE_HSIC)) { /* * Marvell 28nm HSIC PHY requires forcing the port to HS mode. @@ -142,19 +149,8 @@ static int host_start(struct ci_hdrc *ci) priv = (struct ehci_ci_priv *)ehci->priv; priv->reg_vbus = NULL; - if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) { - if (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON) { - ret = regulator_enable(ci->platdata->reg_vbus); - if (ret) { - dev_err(ci->dev, - "Failed to enable vbus regulator, ret=%d\n", - ret); - goto put_hcd; - } - } else { - priv->reg_vbus = ci->platdata->reg_vbus; - } - } + if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci)) + priv->reg_vbus = ci->platdata->reg_vbus; if (ci->platdata->pins_host) pinctrl_select_state(ci->platdata->pctl, @@ -162,7 +158,7 @@ static int host_start(struct ci_hdrc *ci) ret = usb_add_hcd(hcd, 0, 0); if (ret) { - goto disable_reg; + goto put_hcd; } else { struct usb_otg *otg = &ci->otg; @@ -181,10 +177,6 @@ static int host_start(struct ci_hdrc *ci) return ret; -disable_reg: - if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) && - (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON)) - regulator_disable(ci->platdata->reg_vbus); put_hcd: usb_put_hcd(hcd); @@ -203,9 +195,6 @@ static void host_stop(struct ci_hdrc *ci) ci->role = CI_ROLE_END; synchronize_irq(ci->irq); usb_put_hcd(hcd); - if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) && - (ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON)) - regulator_disable(ci->platdata->reg_vbus); } ci->hcd = NULL; ci->otg.host = NULL;