From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dong Aisheng Subject: Re: [PATCH] mmc: sdhci-esdhc-imx: Enable boot partition access from DT Date: Wed, 3 Sep 2014 10:59:48 +0800 Message-ID: <20140903025944.GA18325@shlinux1.ap.freescale.net> References: <1409672977-26972-1-git-send-email-jean-michel.hautbois@vodalys.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-path: Received: from mail-bn1blp0182.outbound.protection.outlook.com ([207.46.163.182]:7446 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753108AbaICDVP (ORCPT ); Tue, 2 Sep 2014 23:21:15 -0400 Content-Disposition: inline In-Reply-To: <1409672977-26972-1-git-send-email-jean-michel.hautbois@vodalys.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Jean-Michel Hautbois Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, rmk+kernel@arm.linux.org.uk, shawn.guo@linaro.org, peter.griffin@linaro.org, tgih.jun@samsung.com, h80.chung@samsung.com, ulf.hansson@linaro.org, chris@printf.net, galak@codeaurora.org, ijc+devicetree@hellion.org.uk, mark.rutland@arm.com, pawel.moll@arm.com, robh+dt@kernel.org On Tue, Sep 02, 2014 at 05:49:37PM +0200, Jean-Michel Hautbois wrote: > This property is useful when we don't want to access boot partitions on eMMC > Any special reason why not access boot partitions on eMMC? Not allow user to access it? > Signed-off-by: Jean-Michel Hautbois > --- > Documentation/devicetree/bindings/mmc/mmc.txt | 1 + > drivers/mmc/host/sdhci-esdhc-imx.c | 8 ++++++++ > include/linux/platform_data/mmc-esdhc-imx.h | 1 + > 3 files changed, 10 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt > index 431716e..59cc854 100644 > --- a/Documentation/devicetree/bindings/mmc/mmc.txt > +++ b/Documentation/devicetree/bindings/mmc/mmc.txt > @@ -40,6 +40,7 @@ Optional properties: > - mmc-hs200-1_2v: eMMC HS200 mode(1.2V I/O) is supported > - mmc-hs400-1_8v: eMMC HS400 mode(1.8V I/O) is supported > - mmc-hs400-1_2v: eMMC HS400 mode(1.2V I/O) is supported > +- no-boot-part : when preset, tells to access boot partitions The file you changed is common mmc binding doc. You may also want to add the support in mmc_of_parse. And since sdhci-esdhc-imx is not using mmc_of_parse currently, maybe it's time to convert to it. Regards Dong Aisheng > > *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line > polarity properties, we have to fix the meaning of the "normal" and "inverted" > diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c > index ccec0e3..439e663 100644 > --- a/drivers/mmc/host/sdhci-esdhc-imx.c > +++ b/drivers/mmc/host/sdhci-esdhc-imx.c > @@ -942,6 +942,11 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, > if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line)) > boarddata->delay_line = 0; > > + if (of_find_property(np, "no-boot-part", NULL)) > + boarddata->access_boot_part = false; > + else > + boarddata->access_boot_part = true; > + > return 0; > } > #else > @@ -1119,6 +1124,9 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev) > host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; > } > > + if (!boarddata->access_boot_part) > + host->mmc->caps2 |= MMC_CAP2_BOOTPART_NOACC; > + > err = sdhci_add_host(host); > if (err) > goto disable_clk; > diff --git a/include/linux/platform_data/mmc-esdhc-imx.h b/include/linux/platform_data/mmc-esdhc-imx.h > index 75f70f6..a34ee9e 100644 > --- a/include/linux/platform_data/mmc-esdhc-imx.h > +++ b/include/linux/platform_data/mmc-esdhc-imx.h > @@ -46,5 +46,6 @@ struct esdhc_platform_data { > unsigned int f_max; > bool support_vsel; > unsigned int delay_line; > + bool access_boot_part; > }; > #endif /* __ASM_ARCH_IMX_ESDHC_H */ > > 2.0.4 >