From patchwork Mon Nov 19 11:16:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Faiz Abbas X-Patchwork-Id: 10688535 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 3D0C714BD for ; Mon, 19 Nov 2018 11:14:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2B3B729558 for ; Mon, 19 Nov 2018 11:14:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 1C1B329A64; Mon, 19 Nov 2018 11:14:19 +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=-7.9 required=2.0 tests=BAYES_00,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 9D3B229558 for ; Mon, 19 Nov 2018 11:14:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728612AbeKSVhX (ORCPT ); Mon, 19 Nov 2018 16:37:23 -0500 Received: from fllv0016.ext.ti.com ([198.47.19.142]:43302 "EHLO fllv0016.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728557AbeKSVhW (ORCPT ); Mon, 19 Nov 2018 16:37:22 -0500 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0016.ext.ti.com (8.15.2/8.15.2) with ESMTP id wAJBE3wG073471; Mon, 19 Nov 2018 05:14:03 -0600 Received: from DFLE104.ent.ti.com (dfle104.ent.ti.com [10.64.6.25]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTPS id wAJBE3jS022476 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 19 Nov 2018 05:14:03 -0600 Received: from DFLE110.ent.ti.com (10.64.6.31) by DFLE104.ent.ti.com (10.64.6.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1591.10; Mon, 19 Nov 2018 05:14:02 -0600 Received: from dflp33.itg.ti.com (10.64.6.16) by DFLE110.ent.ti.com (10.64.6.31) with Microsoft SMTP Server (version=TLS1_0, cipher=TLS_RSA_WITH_AES_256_CBC_SHA) id 15.1.1591.10 via Frontend Transport; Mon, 19 Nov 2018 05:14:02 -0600 Received: from a0230074-OptiPlex-7010.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id wAJBDr13029910; Mon, 19 Nov 2018 05:14:01 -0600 From: Faiz Abbas To: , CC: , , , Subject: [PATCH 3/4] mmc: sdhci-omap: Add platform specific reset callback Date: Mon, 19 Nov 2018 16:46:17 +0530 Message-ID: <20181119111618.2745-4-faiz_abbas@ti.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181119111618.2745-1-faiz_abbas@ti.com> References: <20181119111618.2745-1-faiz_abbas@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 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 TRM (SPRUIC2C - January 2017 - Revised May 2018 [1]) forbids assertion of data reset while tuning is happening. Implement a platform specific callback that takes care of this condition. [1] http://www.ti.com/lit/pdf/spruic2 Section 25.5.1.2.4 Signed-off-by: Faiz Abbas Acked-by: Kishon Vijay Abraham I --- drivers/mmc/host/sdhci-omap.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-omap.c b/drivers/mmc/host/sdhci-omap.c index cfffcf58be3f..bf268b38ddc8 100644 --- a/drivers/mmc/host/sdhci-omap.c +++ b/drivers/mmc/host/sdhci-omap.c @@ -688,6 +688,18 @@ static void sdhci_omap_set_uhs_signaling(struct sdhci_host *host, sdhci_omap_start_clock(omap_host); } +void sdhci_omap_reset(struct sdhci_host *host, u8 mask) +{ + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_omap_host *omap_host = sdhci_pltfm_priv(pltfm_host); + + /* Don't reset data lines during tuning operation */ + if (omap_host->is_tuning) + mask &= ~SDHCI_RESET_DATA; + + sdhci_reset(host, mask); +} + static struct sdhci_ops sdhci_omap_ops = { .set_clock = sdhci_omap_set_clock, .set_power = sdhci_omap_set_power, @@ -696,7 +708,7 @@ static struct sdhci_ops sdhci_omap_ops = { .get_min_clock = sdhci_omap_get_min_clock, .set_bus_width = sdhci_omap_set_bus_width, .platform_send_init_74_clocks = sdhci_omap_init_74_clocks, - .reset = sdhci_reset, + .reset = sdhci_omap_reset, .set_uhs_signaling = sdhci_omap_set_uhs_signaling, };