From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751522AbbCTMUk (ORCPT ); Fri, 20 Mar 2015 08:20:40 -0400 Received: from mga14.intel.com ([192.55.52.115]:34458 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751198AbbCTMUg (ORCPT ); Fri, 20 Mar 2015 08:20:36 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,436,1422950400"; d="scan'208";a="701636950" From: Heikki Krogerus To: Felipe Balbi Cc: Greg Kroah-Hartman , David Cohen , Stephen Boyd , Baolu Lu , linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCHv3 09/12] usb: dwc3: pci: add quirk for Baytrails Date: Fri, 20 Mar 2015 14:20:33 +0200 Message-Id: <1426854033-111822-1-git-send-email-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <20150319115120.GC2435@kuha.fi.intel.com> References: <20150319115120.GC2435@kuha.fi.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On some BYT platforms the USB2 PHY needs to be put into operational mode by the controller driver with GPIOs controlling the PHYs reset and cs signals. Signed-off-by: Heikki Krogerus --- drivers/usb/dwc3/dwc3-pci.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c index b773fb5..c3de883 100644 --- a/drivers/usb/dwc3/dwc3-pci.c +++ b/drivers/usb/dwc3/dwc3-pci.c @@ -21,6 +21,8 @@ #include #include #include +#include +#include #include "platform_data.h" @@ -31,6 +33,15 @@ #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 #define PCI_DEVICE_ID_INTEL_SPTH 0xa130 +static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; +static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; + +static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { + { "reset-gpios", &reset_gpios, 1 }, + { "cs-gpios", &cs_gpios, 1 }, + { }, +}; + static int dwc3_pci_quirks(struct pci_dev *pdev) { if (pdev->vendor == PCI_VENDOR_ID_AMD && @@ -65,6 +76,30 @@ static int dwc3_pci_quirks(struct pci_dev *pdev) sizeof(pdata)); } + if (pdev->vendor == PCI_VENDOR_ID_INTEL && + pdev->device == PCI_DEVICE_ID_INTEL_BYT) { + struct gpio_desc *gpio; + + acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), + acpi_dwc3_byt_gpios); + + /* These GPIOs will turn on the USB2 PHY */ + gpio = gpiod_get(&pdev->dev, "cs"); + if (!IS_ERR(gpio)) { + gpiod_direction_output(gpio, 0); + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + } + + gpio = gpiod_get(&pdev->dev, "reset"); + if (!IS_ERR(gpio)) { + gpiod_direction_output(gpio, 0); + gpiod_set_value_cansleep(gpio, 1); + gpiod_put(gpio); + msleep(10); + } + } + return 0; } -- 2.1.4