Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753484Ab3CRMeA (ORCPT ); Mon, 18 Mar 2013 08:34:00 -0400 Received: from hqemgate03.nvidia.com ([216.228.121.140]:6477 "EHLO hqemgate03.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753341Ab3CRMdy (ORCPT ); Mon, 18 Mar 2013 08:33:54 -0400 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Mon, 18 Mar 2013 05:33:45 -0700 From: Venu Byravarasu To: , , CC: , , , , , Venu Byravarasu Subject: [PATCH 6/7] usb: phy: tegra: Add error handling & clean up. Date: Mon, 18 Mar 2013 17:59:40 +0530 Message-ID: <1363609781-4045-7-git-send-email-vbyravarasu@nvidia.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1363609781-4045-1-git-send-email-vbyravarasu@nvidia.com> References: <1363609781-4045-1-git-send-email-vbyravarasu@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2772 Lines: 94 Check return values from all GPIO APIs and handle errors accordingly. Remove clk_disable_unprepare which is no more needed. Signed-off-by: Venu Byravarasu --- drivers/usb/phy/tegra_usb_phy.c | 50 ++++++++++++++++++++++++++++++-------- 1 files changed, 39 insertions(+), 11 deletions(-) diff --git a/drivers/usb/phy/tegra_usb_phy.c b/drivers/usb/phy/tegra_usb_phy.c index 29c5ac4..7ead114 100644 --- a/drivers/usb/phy/tegra_usb_phy.c +++ b/drivers/usb/phy/tegra_usb_phy.c @@ -542,9 +542,17 @@ static int ulpi_phy_power_on(struct tegra_usb_phy *phy) unsigned long val; void __iomem *base = phy->regs; - gpio_direction_output(phy->reset_gpio, 0); + ret = gpio_direction_output(phy->reset_gpio, 0); + if (ret < 0) { + dev_err(phy->dev, "gpio %d direction not set\n", phy->reset_gpio); + return ret; + } msleep(5); - gpio_direction_output(phy->reset_gpio, 1); + ret = gpio_direction_output(phy->reset_gpio, 1); + if (ret < 0) { + dev_err(phy->dev, "gpio %d direction not set\n", phy->reset_gpio); + return ret; + } clk_prepare_enable(phy->clk); msleep(1); @@ -624,24 +632,44 @@ static int tegra_phy_init(struct usb_phy *x) of_get_named_gpio(phy->dev->of_node, "nvidia,phy-reset-gpio", 0); if (!gpio_is_valid(phy->reset_gpio)) { - pr_err("%s: invalid reset gpio: %d\n", __func__, + dev_err(phy->dev, "invalid gpio: %d\n", + phy->reset_gpio); + err = phy->reset_gpio; + goto cleanup_clk_get; + } + + err = gpio_request(phy->reset_gpio, "ulpi_phy_reset_b"); + if (err < 0) { + dev_err(phy->dev, "request failed for gpio: %d\n", phy->reset_gpio); - err = -EINVAL; - goto err1; + goto cleanup_clk_get; + } + + err = gpio_direction_output(phy->reset_gpio, 0); + if (err < 0) { + dev_err(phy->dev, "gpio %d direction not set to output\n", + phy->reset_gpio); + goto cleanup_gpio_req; } - gpio_request(phy->reset_gpio, "ulpi_phy_reset_b"); - gpio_direction_output(phy->reset_gpio, 0); + phy->ulpi = otg_ulpi_create(&ulpi_viewport_access_ops, 0); + if (!phy->ulpi) { + dev_err(phy->dev, "otg_ulpi_create returned err\n"); + err = -ENOMEM; + goto cleanup_gpio_req; + } + phy->ulpi->io_priv = phy->regs + ULPI_VIEWPORT; } else { err = utmip_pad_open(phy); if (err < 0) - goto err1; + return err; } return 0; -err1: - clk_disable_unprepare(phy->pll_u); - clk_put(phy->pll_u); +cleanup_gpio_req: + gpio_free(phy->reset_gpio); +cleanup_clk_get: + clk_put(phy->clk); return err; } -- 1.7.0.4 -- 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/