From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Rini Subject: Re: [U-Boot,v4,12/13] cmd: fdt: add fdt overlay application subcommand Date: Sun, 21 Aug 2016 11:08:01 -0400 Message-ID: <20160821150801.GE5342@bill-the-cat> References: <20160705082646.25044-13-maxime.ripard@free-electrons.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="l8YfOjwMha7d9KWK" Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=konsulko.com; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=L2hYMq9syJLqB0lAnaDuiLrWjCcJgvtpBhf75bN2nPo=; b=HAFYKg1MIwhRSLE/WLjMAT+xip5uuQZrwuGwKtsydNLJGY3bZAIK5gugQAInSkWdrr Smmcq61OhJdvhZlxsU+G/hMa+YA+W/0voh/Heuk3nhXraHIV78nPWrVimd5NyeLAXGUd /I0i2HT32LUncELpsfxRRDnJQ1KEgO33BNztc= Content-Disposition: inline In-Reply-To: <20160705082646.25044-13-maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> Sender: devicetree-compiler-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: To: Maxime Ripard Cc: Pantelis Antoniou , Simon Glass , Thomas Petazzoni , u-boot-0aAXYlwwYIKGBzrmiIFOJg@public.gmane.org, Alexander Kaplan , devicetree-compiler-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, David Gibson --l8YfOjwMha7d9KWK Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Tue, Jul 05, 2016 at 10:26:45AM +0200, Maxime Ripard wrote: > The device tree overlays are a good way to deal with user-modifyable > boards or boards with some kind of an expansion mechanism where we can > easily plug new board in (like the BBB or the raspberry pi). >=20 > However, so far, the usual mechanism to deal with it was to have in Linux > some driver detecting the expansion boards plugged in and then request > these overlays using the firmware interface. >=20 > That works in most cases, but in some cases, you might want to have the > overlays applied before the userspace comes in. Either because the new > board requires some kind of an early initialization, or because your root > filesystem is accessed through that expansion board. >=20 > The easiest solution in such a case is to simply have the component before > Linux applying that overlay, removing all these drawbacks. >=20 > Reviewed-by: Stefan Agner > Acked-by: Pantelis Antoniou > Acked-by: Simon Glass > Signed-off-by: Maxime Ripard Applied to u-boot/master, thanks! --=20 Tom --l8YfOjwMha7d9KWK Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJXucPRAAoJEIf59jXTHXZS52UQAMCH6auzXqyVaY5/qt2E3K5g tCcigdPE8POnYSUO8RGSAsQqSGLNuPx0wHym1Ge+H2l8YeeS9cZx+2nG84Xbtc/G xXz/9LaZlROeikdrgwEHllmR1dL2l5kD+6nK3cSv5Spu54hCnoMse8z7YhbHGmcc rM4X4/tlKW36lyrbSc9rRccgqFEytg6vX/KQG4MWmpykk+ujmAjkAWKEDeEZlFjp NSdUNNTcGxsYfFcSKZZc7gmbXuc9m7JiQmjjLDuyCJhPxDjjfK0kaoUCCHfP2I6S amonqbeh2VIQOunk4bAliVrHcQ8zACZoaMnHqGKpf7cER7PewRSyRBx5fzi2aKfG TybEtdsKiPFqx87tdYvkmQygNCL9mcUvOSyklM+Nro4eEF2a7hcXF9NRevVBgxZH EsUmxM72kxAuALoqaqPap5KdN9D/5Q+MlMDiTWfZMsEe4yBiebFDDeM6lqN+MB09 pqGK1lOFnsHRTMPJRv2A9VDAiZDvRBAhxK7yWL7COvhh4Fkk6LBrBom1IUSFiP82 jlEcX9GXdQAzbkMvd4OsHEcgiJfBtAu41KltclGFOKCu4pI7kGkiqn7PPdVUdwkk N/SdreS2mYJilSIRg6yj08Ml+bvdYUSyGjrIPs28Fqc7iitp4ir4UMX4lK7ccP23 AcHr6i9dsdGloFuK0zjV =C9PF -----END PGP SIGNATURE----- --l8YfOjwMha7d9KWK--