linux-kernel - Re: [PATCH 2/8] mmc: sdhci-pxav3: disable clock inversion for HS MMC cards

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAPDyKFrfQJbg9qJmethK2NEzi-crS1vstozYAFR5nRuyM0Hv_Q@mail.gmail.com>
Date:	Thu, 8 Oct 2015 19:35:52 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Marcin Wojtas <mw@...ihalf.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Andrew Lunn <andrew@...n.ch>,
	Jason Cooper <jason@...edaemon.net>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory Clement <gregory.clement@...e-electrons.com>,
	Nadav Haklai <nadavh@...vell.com>,
	Lior Amsalem <alior@...vell.com>,
	Tawfik Bayouk <tawfik@...vell.com>, jaz@...ihalf.com,
	"# 4.0+" <stable@...r.kernel.org>
Subject: Re: [PATCH 2/8] mmc: sdhci-pxav3: disable clock inversion for HS MMC cards

On 6 October 2015 at 03:22, Marcin Wojtas <mw@...ihalf.com> wrote:
> From: Nadav Haklai <nadavh@...vell.com>
>
> According to 'FE-2946959' erratum the clock inversion option is
> needed to support slow frequencies when the card input hold time
> requirement is high. This setting is not required for high speed
> MMC and might cause timing violation.
>
> Signed-off-by: Nadav Haklai <nadavh@...vell.com>
> Cc: <stable@...r.kernel.org> # v4.2

Thanks, applied for fixes!

Kind regards
Uffe

> ---
>  drivers/mmc/host/sdhci-pxav3.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pxav3.c b/drivers/mmc/host/sdhci-pxav3.c
> index 976cddd..89a9e49 100644
> --- a/drivers/mmc/host/sdhci-pxav3.c
> +++ b/drivers/mmc/host/sdhci-pxav3.c
> @@ -291,6 +291,9 @@ static void pxav3_set_uhs_signaling(struct sdhci_host *host, unsigned int uhs)
>                     uhs == MMC_TIMING_UHS_DDR50) {
>                         reg_val &= ~SDIO3_CONF_CLK_INV;
>                         reg_val |= SDIO3_CONF_SD_FB_CLK;
> +               } else if (uhs == MMC_TIMING_MMC_HS) {
> +                       reg_val &= ~SDIO3_CONF_CLK_INV;
> +                       reg_val &= ~SDIO3_CONF_SD_FB_CLK;
>                 } else {
>                         reg_val |= SDIO3_CONF_CLK_INV;
>                         reg_val &= ~SDIO3_CONF_SD_FB_CLK;
> --
> 1.8.3.1
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/