linux-kernel - Re: [PATCH 8/9] ARM: at91/dt: add new at91rm9200ek

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Date:	Wed, 20 Nov 2013 18:27:22 +0100
From:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
To:	boris brezillon <b.brezillon@...rkiz.com>
Cc:	Rob Herring <rob.herring@...xeda.com>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Stephen Warren <swarren@...dotorg.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	Russell King <linux@....linux.org.uk>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	Joachim Eastwood <manabian@...il.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 8/9] ARM: at91/dt: add new at91rm9200ek_mmc board

On 17:31 Wed 20 Nov     , boris brezillon wrote:
> On 20/11/2013 16:02, Jean-Christophe PLAGNIOL-VILLARD wrote:
> >On 14:37 Wed 28 Aug     , Boris BREZILLON wrote:
> >>Add a new at91rm9200ek_mmc board (based on at91rm9200ek board) which enables
> >>mmc0/slot0.
> >no for multiple dts
> >
> >this need to handle at user space level
> 
> You mean, by controlling the regulator using the sysfs interface, or
> by loading
> only the appropriate driver ?
load the partial dts via userspace
> 
> What if both drivers are loaded (or not compiled as modules) ?
> This will lead to one device being unusable (and maybe even worst)...
> 
this will never be the case

Best Regards,
J.
> Please explain what you had in mind ?
> 
> >
> >Best Regards,
> >J.
> >>Signed-off-by: Boris BREZILLON <b.brezillon@...rkiz.com>
> >>---
> >>  arch/arm/boot/dts/at91rm9200ek_mmc.dts |   23 +++++++++++++++++++++++
> >>  1 file changed, 23 insertions(+)
> >>  create mode 100644 arch/arm/boot/dts/at91rm9200ek_mmc.dts
> >>
> >>diff --git a/arch/arm/boot/dts/at91rm9200ek_mmc.dts b/arch/arm/boot/dts/at91rm9200ek_mmc.dts
> >>new file mode 100644
> >>index 0000000..c87a861
> >>--- /dev/null
> >>+++ b/arch/arm/boot/dts/at91rm9200ek_mmc.dts
> >>@@ -0,0 +1,23 @@
> >>+/*
> >>+ * at91rm9200ek.dts - Device Tree file for Atmel AT91RM9200 evaluation kit with
> >>+ *                    an MMC slot
> >>+ *
> >>+ *  Copyright (C) 2013 Boris BREZILLON <b.brezillon@...rkiz.com>
> >>+ *
> >>+ * Licensed under GPLv2 only
> >>+ */
> >>+/dts-v1/;
> >>+#include "at91rm9200ek.dts"
> >>+
> >>+/ {
> >>+	model = "Atmel AT91RM9200 evaluation kit with MMC slot";
> >>+	compatible = "atmel,at91rm9200ek-mmc", "atmel,at91rm9200ek", "atmel,at91rm9200";
> >>+
> >>+	ahb {
> >>+		apb {
> >>+			mmc0: mmc@...b4000 {
> >>+				status = "okay";
> >>+			};
> >>+		};
> >>+	};
> >>+};
> >>-- 
> >>1.7.9.5
> >>
> 
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