From patchwork Thu Aug 8 22:24:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Osipenko X-Patchwork-Id: 11084925 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E38C414DB for ; Thu, 8 Aug 2019 22:25:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D121728911 for ; Thu, 8 Aug 2019 22:25:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C3F6B289AD; Thu, 8 Aug 2019 22:25:47 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 656C628911 for ; Thu, 8 Aug 2019 22:25:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404695AbfHHWZr (ORCPT ); Thu, 8 Aug 2019 18:25:47 -0400 Received: from mail-lj1-f196.google.com ([209.85.208.196]:39456 "EHLO mail-lj1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732708AbfHHWZq (ORCPT ); Thu, 8 Aug 2019 18:25:46 -0400 Received: by mail-lj1-f196.google.com with SMTP id v18so90278587ljh.6; Thu, 08 Aug 2019 15:25:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Q9p8dp4Vwd7zb49ZfmkHjOde2lTf1kQmZ0LZmoXXg+Y=; b=X/HCeJp6SdIpegsENNIX5jnBFbtDSt0UzsTUaN0a3V8l4KnCb/S47gsOo5w4dI/NuL V5etWewZyguGVw5FG6KZWbW1LS15klZZSFCTiM7xpoSJFKT0PQDSyqOStwc5XptUNDIb qgY409tTcnSLMME5LL0QF9qUqJEJ5eul/A29A05dpYuiAE/VlwyFHs9wqNchY3n6E3tm PvQ0AGqmCEPC4oalZvcTWwYpZWM+7HKgb3eXOP5yluvevmLCNFylOeAYk+oId8vPdONf JOWaRweXeFZl1b7jrY0HUlayIuG7iqV2+q/o6hzKZx9BLRodDP11LPPM9cHiWEb3wN3X 4CBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Q9p8dp4Vwd7zb49ZfmkHjOde2lTf1kQmZ0LZmoXXg+Y=; b=JGAzGWjuAZo8BCyJ+jFiDtGtbpEogcNiooDB8Q1/3nLH0goLK+zBDHd1O9vjLhGwy2 AMGb5hZq8/csTSRCwTLpO0XWbLb+GETMzbiW7kBz5wrUIXdMfnxkVrAemaUbPFFPp8jh 17jh5PvWtDEfBiixw6hba23owcAHs9TZ6s+6adekP+0J4Rw+hLjVuJQ1J/eIcS8Ea5T5 9pj9rHF7cZ+CvccJTgTk45Q6YVjZIVbOTZmvvRTVwNULu29Op2EPzwI9oTVQj75V+RpE QFGIAEgayyd0hCaz93b9eC/4UjtpyX3SLjqWLNoa7OgLy2F+D3tQzZ+dzq1ljGT2bwWt UnPA== X-Gm-Message-State: APjAAAUx1JJ0CXUgSqw4EMqq5ZYk57Si1XVKMzl5tKnOckrzsVCbL18C y0L1c2r4HgvumbNZx1lPlCY= X-Google-Smtp-Source: APXvYqyRb0wvQlmXB+gXw3/gwm+pd7UaBZTu3orpe9dFWQXE6Yy8xkJqi7BlFLmgkM9E0td9w8j+IQ== X-Received: by 2002:a2e:9b48:: with SMTP id o8mr9572286ljj.122.1565303144838; Thu, 08 Aug 2019 15:25:44 -0700 (PDT) Received: from localhost.localdomain ([94.29.34.218]) by smtp.gmail.com with ESMTPSA id g5sm19318415ljj.69.2019.08.08.15.25.43 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 08 Aug 2019 15:25:43 -0700 (PDT) From: Dmitry Osipenko To: Thierry Reding , Jonathan Hunter , Adrian Hunter , Ulf Hansson Cc: linux-mmc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v1] Revert "mmc: sdhci-tegra: drop ->get_ro() implementation" Date: Fri, 9 Aug 2019 01:24:30 +0300 Message-Id: <20190808222430.28477-1-digetx@gmail.com> X-Mailer: git-send-email 2.22.0 MIME-Version: 1.0 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The WRITE_PROTECT bit is always in a "protected mode" on Tegra and WP-GPIO state need to be used instead. In a case of the GPIO absence, write-enable should be assumed. External SD is writable once again as a result of this patch because the offending commit changed behaviour for the case of a missing WP-GPIO to fall back to WRITE_PROTECT bit-checking, which is incorrect for Tegra. Cc: stable@vger.kernel.org # v5.1+ Fixes: e8391453e27f ("mmc: sdhci-tegra: drop ->get_ro() implementation") Signed-off-by: Dmitry Osipenko Acked-by: Thierry Reding Acked-by: Adrian Hunter --- drivers/mmc/host/sdhci-tegra.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c index f4d4761cf20a..02d8f524bb9e 100644 --- a/drivers/mmc/host/sdhci-tegra.c +++ b/drivers/mmc/host/sdhci-tegra.c @@ -258,6 +258,16 @@ static void tegra210_sdhci_writew(struct sdhci_host *host, u16 val, int reg) } } +static unsigned int tegra_sdhci_get_ro(struct sdhci_host *host) +{ + /* + * Write-enable shall be assumed if GPIO is missing in a board's + * device-tree because SDHCI's WRITE_PROTECT bit doesn't work on + * Tegra. + */ + return mmc_gpio_get_ro(host->mmc); +} + static bool tegra_sdhci_is_pad_and_regulator_valid(struct sdhci_host *host) { struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); @@ -1224,6 +1234,7 @@ static const struct cqhci_host_ops sdhci_tegra_cqhci_ops = { }; static const struct sdhci_ops tegra_sdhci_ops = { + .get_ro = tegra_sdhci_get_ro, .read_w = tegra_sdhci_readw, .write_l = tegra_sdhci_writel, .set_clock = tegra_sdhci_set_clock, @@ -1279,6 +1290,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra30 = { }; static const struct sdhci_ops tegra114_sdhci_ops = { + .get_ro = tegra_sdhci_get_ro, .read_w = tegra_sdhci_readw, .write_w = tegra_sdhci_writew, .write_l = tegra_sdhci_writel, @@ -1332,6 +1344,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra124 = { }; static const struct sdhci_ops tegra210_sdhci_ops = { + .get_ro = tegra_sdhci_get_ro, .read_w = tegra_sdhci_readw, .write_w = tegra210_sdhci_writew, .write_l = tegra_sdhci_writel, @@ -1366,6 +1379,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra210 = { }; static const struct sdhci_ops tegra186_sdhci_ops = { + .get_ro = tegra_sdhci_get_ro, .read_w = tegra_sdhci_readw, .write_l = tegra_sdhci_writel, .set_clock = tegra_sdhci_set_clock,