From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751761AbdH3NNW (ORCPT ); Wed, 30 Aug 2017 09:13:22 -0400 Received: from mail-it0-f51.google.com ([209.85.214.51]:37020 "EHLO mail-it0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751721AbdH3NNS (ORCPT ); Wed, 30 Aug 2017 09:13:18 -0400 MIME-Version: 1.0 In-Reply-To: <20170821074132.4622-3-kishon@ti.com> References: <20170821074132.4622-1-kishon@ti.com> <20170821074132.4622-3-kishon@ti.com> From: Ulf Hansson Date: Wed, 30 Aug 2017 15:13:17 +0200 Message-ID: Subject: Re: [PATCH 2/5] mmc: sdhci: Add quirk to indicate MMC_RSP_136 has CRC To: Kishon Vijay Abraham I Cc: Adrian Hunter , Rob Herring , Tony Lindgren , Sekhar Nori , Russell King , Ravikumar Kattekola , "linux-mmc@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , linux-omap , "linux-arm-kernel@lists.infradead.org" Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 21 August 2017 at 09:41, Kishon Vijay Abraham I wrote: > TI's implementation of sdhci controller used in DRA7 SoC's has > CRC in responses with length 136 bits. Add quirk to indicate > the controller has CRC in MMC_RSP_136. If this quirk is > set sdhci library shouldn't shift the response present in > SDHCI_RESPONSE register. > > Signed-off-by: Kishon Vijay Abraham I Thanks, applied for next! Kind regards Uffe > --- > drivers/mmc/host/sdhci.c | 3 +++ > drivers/mmc/host/sdhci.h | 2 ++ > 2 files changed, 5 insertions(+) > > diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c > index ba639b7851cb..9c8d7428df3c 100644 > --- a/drivers/mmc/host/sdhci.c > +++ b/drivers/mmc/host/sdhci.c > @@ -1182,6 +1182,9 @@ static void sdhci_read_rsp_136(struct sdhci_host *host, struct mmc_command *cmd) > cmd->resp[i] = sdhci_readl(host, reg); > } > > + if (host->quirks2 & SDHCI_QUIRK2_RSP_136_HAS_CRC) > + return; > + > /* CRC is stripped so we need to do some shifting */ > for (i = 0; i < 4; i++) { > cmd->resp[i] <<= 8; > diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h > index 399edc681623..54bc444c317f 100644 > --- a/drivers/mmc/host/sdhci.h > +++ b/drivers/mmc/host/sdhci.h > @@ -435,6 +435,8 @@ struct sdhci_host { > #define SDHCI_QUIRK2_ACMD23_BROKEN (1<<14) > /* Broken Clock divider zero in controller */ > #define SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN (1<<15) > +/* Controller has CRC in 136 bit Command Response */ > +#define SDHCI_QUIRK2_RSP_136_HAS_CRC (1<<16) > > int irq; /* Device IRQ */ > void __iomem *ioaddr; /* Mapped address */ > -- > 2.11.0 >