Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932171Ab3IPCxP (ORCPT ); Sun, 15 Sep 2013 22:53:15 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:40998 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752472Ab3IPCxN (ORCPT ); Sun, 15 Sep 2013 22:53:13 -0400 Message-ID: <5236725E.2090302@ti.com> Date: Mon, 16 Sep 2013 08:22:14 +0530 From: Kishon Vijay Abraham I User-Agent: Mozilla/5.0 (X11; Linux i686; rv:17.0) Gecko/20130510 Thunderbird/17.0.6 MIME-Version: 1.0 To: Roger Quadros CC: , , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH 2/7] usb: dwc3: adapt dwc3 core to use Generic PHY Framework References: <1378136591-7463-1-git-send-email-kishon@ti.com> <1378136591-7463-3-git-send-email-kishon@ti.com> <5231BF7A.3080104@ti.com> In-Reply-To: <5231BF7A.3080104@ti.com> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7124 Lines: 199 On Thursday 12 September 2013 06:49 PM, Roger Quadros wrote: > On 09/02/2013 06:43 PM, Kishon Vijay Abraham I wrote: >> Adapted dwc3 core to use the Generic PHY Framework. So for init, exit, >> power_on and power_off the following APIs are used phy_init(), phy_exit(), >> phy_power_on() and phy_power_off(). >> >> However using the old USB phy library wont be removed till the PHYs of all >> other SoC's using dwc3 core is adapted to the Generic PHY Framework. >> >> Signed-off-by: Kishon Vijay Abraham I >> --- >> Documentation/devicetree/bindings/usb/dwc3.txt | 6 ++- >> drivers/usb/dwc3/Kconfig | 1 + >> drivers/usb/dwc3/core.c | 49 ++++++++++++++++++++++++ >> drivers/usb/dwc3/core.h | 7 ++++ >> 4 files changed, 61 insertions(+), 2 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt b/Documentation/devicetree/bindings/usb/dwc3.txt >> index e807635..471366d 100644 >> --- a/Documentation/devicetree/bindings/usb/dwc3.txt >> +++ b/Documentation/devicetree/bindings/usb/dwc3.txt >> @@ -6,11 +6,13 @@ Required properties: >> - compatible: must be "snps,dwc3" >> - reg : Address and length of the register set for the device >> - interrupts: Interrupts used by the dwc3 controller. >> + >> +Optional properties: >> - usb-phy : array of phandle for the PHY device. The first element >> in the array is expected to be a handle to the USB2/HS PHY and >> the second element is expected to be a handle to the USB3/SS PHY >> - >> -Optional properties: >> + - phys: from the *Generic PHY* bindings >> + - phy-names: from the *Generic PHY* bindings >> - tx-fifo-resize: determines if the FIFO *has* to be reallocated. >> >> This is usually a subnode to DWC3 glue to which it is connected. >> diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig >> index cfc16dd..ad7ce83 100644 >> --- a/drivers/usb/dwc3/Kconfig >> +++ b/drivers/usb/dwc3/Kconfig >> @@ -3,6 +3,7 @@ config USB_DWC3 >> depends on (USB || USB_GADGET) && GENERIC_HARDIRQS && HAS_DMA >> depends on EXTCON >> select USB_PHY >> + select GENERIC_PHY >> select USB_XHCI_PLATFORM if USB_SUPPORT && USB_XHCI_HCD >> help >> Say Y or M here if your system has a Dual Role SuperSpeed >> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c >> index 428c29e..485d365 100644 >> --- a/drivers/usb/dwc3/core.c >> +++ b/drivers/usb/dwc3/core.c >> @@ -82,6 +82,12 @@ static void dwc3_core_soft_reset(struct dwc3 *dwc) >> >> usb_phy_init(dwc->usb2_phy); >> usb_phy_init(dwc->usb3_phy); >> + >> + if (dwc->usb2_generic_phy) >> + phy_init(dwc->usb2_generic_phy); >> + if (dwc->usb3_generic_phy) >> + phy_init(dwc->usb3_generic_phy); >> + >> mdelay(100); >> >> /* Clear USB3 PHY reset */ >> @@ -343,6 +349,11 @@ static void dwc3_core_exit(struct dwc3 *dwc) >> { >> usb_phy_shutdown(dwc->usb2_phy); >> usb_phy_shutdown(dwc->usb3_phy); >> + >> + if (dwc->usb2_generic_phy) >> + phy_power_off(dwc->usb2_generic_phy); >> + if (dwc->usb3_generic_phy) >> + phy_power_off(dwc->usb3_generic_phy); >> } >> >> #define DWC3_ALIGN_MASK (16 - 1) >> @@ -427,6 +438,23 @@ static int dwc3_probe(struct platform_device *pdev) >> dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3); >> } >> >> + if (of_property_read_bool(node, "phys") || pdata->has_phy) { >> + dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy"); >> + if (IS_ERR(dwc->usb2_generic_phy)) { >> + dev_err(dev, "no usb2 phy configured yet"); >> + return PTR_ERR(dwc->usb2_generic_phy); >> + } >> + >> + dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy"); >> + if (IS_ERR(dwc->usb3_generic_phy)) { >> + dev_err(dev, "no usb3 phy configured yet"); >> + return PTR_ERR(dwc->usb3_generic_phy); >> + } >> + } else { >> + dwc->usb2_generic_phy = NULL; >> + dwc->usb3_generic_phy = NULL; >> + } >> + >> /* default to superspeed if no maximum_speed passed */ >> if (dwc->maximum_speed == USB_SPEED_UNKNOWN) >> dwc->maximum_speed = USB_SPEED_SUPER; >> @@ -450,6 +478,11 @@ static int dwc3_probe(struct platform_device *pdev) >> usb_phy_set_suspend(dwc->usb2_phy, 0); >> usb_phy_set_suspend(dwc->usb3_phy, 0); >> >> + if (dwc->usb2_generic_phy) >> + phy_power_on(dwc->usb2_generic_phy); >> + if (dwc->usb3_generic_phy) >> + phy_power_on(dwc->usb3_generic_phy); >> + >> spin_lock_init(&dwc->lock); >> platform_set_drvdata(pdev, dwc); >> >> @@ -576,6 +609,11 @@ static int dwc3_remove(struct platform_device *pdev) >> usb_phy_set_suspend(dwc->usb2_phy, 1); >> usb_phy_set_suspend(dwc->usb3_phy, 1); >> >> + if (dwc->usb2_generic_phy) > > if (IS_ERR()) I assign NULL to usb2_generic_phy and usb3_generic_phy in case the dts entry doesn't have a *phys* property. The IS_ERR of usb2_generic_phy is treated as an error condition and probe will fail. > >> + phy_power_off(dwc->usb2_generic_phy); >> + if (dwc->usb3_generic_phy) > > if (IS_ERR()) > > here and everywhere else in this patch. > >> + phy_power_off(dwc->usb3_generic_phy); >> + >> pm_runtime_put(&pdev->dev); >> pm_runtime_disable(&pdev->dev); >> >> @@ -673,6 +711,11 @@ static int dwc3_suspend(struct device *dev) >> usb_phy_shutdown(dwc->usb3_phy); >> usb_phy_shutdown(dwc->usb2_phy); >> >> + if (dwc->usb2_generic_phy) >> + phy_exit(dwc->usb2_generic_phy); >> + if (dwc->usb3_generic_phy) >> + phy_exit(dwc->usb3_generic_phy); >> + >> return 0; >> } >> >> @@ -683,6 +726,12 @@ static int dwc3_resume(struct device *dev) >> >> usb_phy_init(dwc->usb3_phy); >> usb_phy_init(dwc->usb2_phy); >> + >> + if (dwc->usb2_generic_phy) >> + phy_init(dwc->usb2_generic_phy); >> + if (dwc->usb3_generic_phy) >> + phy_init(dwc->usb3_generic_phy); >> + >> msleep(100); >> >> spin_lock_irqsave(&dwc->lock, flags); >> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h >> index f8af8d4..01ec7d7 100644 >> --- a/drivers/usb/dwc3/core.h >> +++ b/drivers/usb/dwc3/core.h >> @@ -31,6 +31,8 @@ >> #include >> #include >> >> +#include >> + >> /* Global constants */ >> #define DWC3_EP0_BOUNCE_SIZE 512 >> #define DWC3_ENDPOINTS_NUM 32 >> @@ -613,6 +615,8 @@ struct dwc3_scratchpad_array { >> * @dr_mode: requested mode of operation >> * @usb2_phy: pointer to USB2 PHY >> * @usb3_phy: pointer to USB3 PHY >> + * @usb2_generic_phy: pointer to USB2 PHY >> + * @usb3_generic_phy: pointer to USB3 PHY > > Why duplicate usbX_phy and usbX_generic_phy? Can't we just have one > for each type and call it usbX_phy? There was an already existing phy library in usb which usesusb_phy. There might still be users using the existing usb phy library. Until all the users have completely migrated to the generic PHY framework, this would co-exist. Thanks Kishon -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/