From patchwork Thu Oct 22 03:36:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shawn Lin X-Patchwork-Id: 7462181 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 3C0899F37F for ; Thu, 22 Oct 2015 03:38:35 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 3090E20948 for ; Thu, 22 Oct 2015 03:38:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8FE132087D for ; Thu, 22 Oct 2015 03:38:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755846AbbJVDib (ORCPT ); Wed, 21 Oct 2015 23:38:31 -0400 Received: from lucky1.263xmail.com ([211.157.147.133]:53781 "EHLO lucky1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751843AbbJVDia (ORCPT ); Wed, 21 Oct 2015 23:38:30 -0400 Received: from shawn.lin?rock-chips.com (unknown [192.168.167.12]) by lucky1.263xmail.com (Postfix) with SMTP id 8967E4E778; Thu, 22 Oct 2015 11:38:24 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 1 X-MAIL-DELIVERY: 0 X-KSVirus-check: 0 X-ABS-CHECKED: 4 X-ADDR-CHECKED: 0 Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id A65A840B; Thu, 22 Oct 2015 11:38:22 +0800 (CST) X-RL-SENDER: shawn.lin@rock-chips.com X-FST-TO: ulf.hansson@linaro.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: shawn.lin@rock-chips.com X-UNIQUE-TAG: <9bd9ccfaf65ab8153a6fe8d6874d3fc1> X-ATTACHMENT-NUM: 0 X-SENDER: lintao@rock-chips.com X-DNS-TYPE: 0 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith ESMTP id 26950YVXHDE; Thu, 22 Oct 2015 11:38:23 +0800 (CST) From: Shawn Lin To: Ulf Hansson , Michal Simek , Soren Brinkmann Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, Shawn Lin Subject: [PATCH v4 2/4] mmc: sdhci-of-arasan: add phy support for sdhci-of-arasan Date: Thu, 22 Oct 2015 11:36:58 +0800 Message-Id: <1445485018-11942-1-git-send-email-shawn.lin@rock-chips.com> X-Mailer: git-send-email 1.8.0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds Generic PHY access for sdhci-of-arasan. Driver can get PHY handler from dt-binding, and power-on/init the PHY. Also we add pm ops for PHY here if CONFIG_PM_SLEEP is enabled. Currently, it's just mandatory for arasan,sdhci-5.1. Signed-off-by: Shawn Lin Serise-changes: 4 - remove suspend/resume_phy - add err handle label for system PM callback - fix comments of struct sdhci_arasan_data and system PM callback suggested by Michal Serise-changes: 3 - remove phy_init/exit for suspend/resume - adjust phy_int/power_on seq to make code more reasonable - simplify suspend/resume_phy Serise-changes: 2 - Keep phy as a mandatory requirement for arasan,sdhci-5.1 --- Changes in v2: None drivers/mmc/host/sdhci-of-arasan.c | 63 +++++++++++++++++++++++++++++++++++--- 1 file changed, 59 insertions(+), 4 deletions(-) diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c index 75379cb..4f30716 100644 --- a/drivers/mmc/host/sdhci-of-arasan.c +++ b/drivers/mmc/host/sdhci-of-arasan.c @@ -21,6 +21,7 @@ #include #include +#include #include "sdhci-pltfm.h" #define SDHCI_ARASAN_CLK_CTRL_OFFSET 0x2c @@ -32,9 +33,11 @@ /** * struct sdhci_arasan_data * @clk_ahb: Pointer to the AHB clock + * @phy: Pointer to the generic phy */ struct sdhci_arasan_data { struct clk *clk_ahb; + struct phy *phy; }; static unsigned int sdhci_arasan_get_timeout_clock(struct sdhci_host *host) @@ -72,7 +75,7 @@ static struct sdhci_pltfm_data sdhci_arasan_pdata = { /** * sdhci_arasan_suspend - Suspend method for the driver * @dev: Address of the device structure - * Returns 0 on success and error value on error + * Return: 0 on success and error value on error * * Put the device in a low power state. */ @@ -88,6 +91,14 @@ static int sdhci_arasan_suspend(struct device *dev) if (ret) return ret; + if (!IS_ERR(sdhci_arasan->phy)) { + ret = phy_power_off(sdhci_arasan->phy); + if (ret) { + dev_err(dev, "Cannot suspend phy.\n"); + return ret; + } + } + clk_disable(pltfm_host->clk); clk_disable(sdhci_arasan->clk_ahb); @@ -97,7 +108,7 @@ static int sdhci_arasan_suspend(struct device *dev) /** * sdhci_arasan_resume - Resume method for the driver * @dev: Address of the device structure - * Returns 0 on success and error value on error + * Return: 0 on success and error value on error * * Resume operation after suspend */ @@ -118,11 +129,24 @@ static int sdhci_arasan_resume(struct device *dev) ret = clk_enable(pltfm_host->clk); if (ret) { dev_err(dev, "Cannot enable SD clock.\n"); - clk_disable(sdhci_arasan->clk_ahb); - return ret; + goto err_clk_en; + } + + if (!IS_ERR(sdhci_arasan->phy)) { + ret = phy_power_on(sdhci_arasan->phy); + if (ret) { + dev_err(dev, "Cannot resume phy.\n"); + goto err_phy_power; + } } return sdhci_resume_host(host); + +err_phy_power: + clk_disable(pltfm_host->clk); +err_clk_en: + clk_disable(sdhci_arasan->clk_ahb); + return ret; } #endif /* ! CONFIG_PM_SLEEP */ @@ -188,6 +212,31 @@ static int sdhci_arasan_probe(struct platform_device *pdev) goto clk_disable_all; } + sdhci_arasan->phy = ERR_PTR(-ENODEV); + if (of_device_is_compatible(pdev->dev.of_node, + "arasan,sdhci-5.1")) { + sdhci_arasan->phy = devm_phy_get(&pdev->dev, + "phy_arasan"); + if (IS_ERR(sdhci_arasan->phy)) { + ret = PTR_ERR(sdhci_arasan->phy); + dev_err(&pdev->dev, "No phy for arasan,sdhci-5.1.\n"); + goto clk_disable_all; + } + + ret = phy_init(sdhci_arasan->phy); + if (ret < 0) { + dev_err(&pdev->dev, "phy_init err.\n"); + goto clk_disable_all; + } + + ret = phy_power_on(sdhci_arasan->phy); + if (ret < 0) { + dev_err(&pdev->dev, "phy_power_on err.\n"); + phy_exit(sdhci_arasan->phy); + goto err_phy_power; + } + } + ret = sdhci_add_host(host); if (ret) goto err_pltfm_free; @@ -196,6 +245,9 @@ static int sdhci_arasan_probe(struct platform_device *pdev) err_pltfm_free: sdhci_pltfm_free(pdev); +err_phy_power: + if (!IS_ERR(sdhci_arasan->phy)) + phy_exit(sdhci_arasan->phy); clk_disable_all: clk_disable_unprepare(clk_xin); clk_dis_ahb: @@ -210,6 +262,9 @@ static int sdhci_arasan_remove(struct platform_device *pdev) struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); struct sdhci_arasan_data *sdhci_arasan = pltfm_host->priv; + if (!IS_ERR(sdhci_arasan->phy)) + phy_exit(sdhci_arasan->phy); + clk_disable_unprepare(sdhci_arasan->clk_ahb); return sdhci_pltfm_unregister(pdev);