From patchwork Thu Sep 4 00:55:19 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Simon Horman X-Patchwork-Id: 385693 Return-Path: X-Original-To: incoming-dt@patchwork.ozlabs.org Delivered-To: patchwork-incoming-dt@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id DA2151401FA for ; Thu, 4 Sep 2014 10:56:04 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932838AbaIDA4D (ORCPT ); Wed, 3 Sep 2014 20:56:03 -0400 Received: from kirsty.vergenet.net ([202.4.237.240]:50666 "EHLO kirsty.vergenet.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932813AbaIDA4C (ORCPT ); Wed, 3 Sep 2014 20:56:02 -0400 Received: from ayumi.isobedori.kobe.vergenet.net (p4222-ipbfp1605kobeminato.hyogo.ocn.ne.jp [114.154.95.222]) by kirsty.vergenet.net (Postfix) with ESMTP id C769325BF4D; Thu, 4 Sep 2014 10:55:53 +1000 (EST) Received: by ayumi.isobedori.kobe.vergenet.net (Postfix, from userid 7100) id F3E9CEDE8E2; Thu, 4 Sep 2014 09:55:56 +0900 (JST) From: Simon Horman To: linux-sh@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Magnus Damm , devicetree@vger.kernel.org, Laurent Pinchart , Geert Uytterhoeven , Mark Rutland , Sergei Shtylyov , Simon Horman Subject: [PATCH v2 1/3] clocksource: sh_cmt: Document SoC specific bindings Date: Thu, 4 Sep 2014 09:55:19 +0900 Message-Id: <1409792121-28912-2-git-send-email-horms+renesas@verge.net.au> X-Mailer: git-send-email 2.0.1 In-Reply-To: <1409792121-28912-1-git-send-email-horms+renesas@verge.net.au> References: <1409792121-28912-1-git-send-email-horms+renesas@verge.net.au> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org In general Renesas hardware is not documented to the extent where the relationship between IP blocks on different SoCs can be assumed although they may appear to operate the same way. Furthermore the documentation typically does not specify a version for individual IP blocks. For these reasons a convention of using the SoC name in place of a version and providing SoC-specific compat strings has been adopted. Although not universally liked this convention is used in the bindings for a number of drivers for Renesas hardware. The purpose of this patch is to update the Renesas R-Car Compare Match Timer (CMT) driver to follow this convention. Signed-off-by: Simon Horman Acked-by: Geert Uytterhoeven Acked-by: Mark Rutland Acked-by: Laurent Pinchart --- * I plan to follow up with patches to use these new bindings in the dtsi files for the affected SoCs. v2 * Reorder compat entries so more-specific entries and their fallbacks are grouped with the fallback entry coming last. * Explicitly document fallback --- .../devicetree/bindings/timer/renesas,cmt.txt | 44 +++++++++++++++++++--- 1 file changed, 38 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/timer/renesas,cmt.txt b/Documentation/devicetree/bindings/timer/renesas,cmt.txt index a17418b..7b44f4b 100644 --- a/Documentation/devicetree/bindings/timer/renesas,cmt.txt +++ b/Documentation/devicetree/bindings/timer/renesas,cmt.txt @@ -11,15 +11,47 @@ datasheets. Required Properties: - - compatible: must contain one of the following. - - "renesas,cmt-32" for the 32-bit CMT + - compatible: must contain one or more of the following: + - "renesas,cmt-32-r8a7740" for the R8a7740 32-bit CMT + (CMT0) + - "renesas,cmt-32-sh7372" for the SH7372 32-bit CMT + (CMT0) + - "renesas,cmt-32-sh73a0" for the SH73a0 32-bit CMT + (CMT0) + - "renesas,cmt-32" for all 32-bit CMT without fast clock support (CMT0 on sh7372, sh73a0 and r8a7740) - - "renesas,cmt-32-fast" for the 32-bit CMT with fast clock support + This is a fallback for the above renesas,cmt-32-* entries. + + - "renesas,cmt-32-fast-r8a7740" for the R8A7740 32-bit CMT with fast + clock support (CMT[234]) + - "renesas,cmt-32-fast-sh7372" for the SH7372 32-bit CMT with fast + clock support (CMT[234]) + - "renesas,cmt-32-fast-sh73a0" for the SH73A0 32-bit CMT with fast + clock support (CMT[234]) + - "renesas,cmt-32-fast" for all 32-bit CMT with fast clock support (CMT[234] on sh7372, sh73a0 and r8a7740) - - "renesas,cmt-48" for the 48-bit CMT + This is a fallback for the above renesas,cmt-32-fast-* entries. + + - "renesas,cmt-48-sh7372" for the SH7372 48-bit CMT + (CMT1) + - "renesas,cmt-48-sh73a0" for the SH73A0 48-bit CMT + (CMT1) + - "renesas,cmt-48-r8a7740" for the R8A7740 48-bit CMT + (CMT1) + - "renesas,cmt-48" for all non-second generation 48-bit CMT (CMT1 on sh7372, sh73a0 and r8a7740) - - "renesas,cmt-48-gen2" for the second generation 48-bit CMT + This is a fallback for the above renesas,cmt-48-* entries. + + - "renesas,cmt-48-r8a73a4" for the R8A73A4 48-bit CMT + (CMT[01]) + - "renesas,cmt-48-r8a7790" for the R8A7790 48-bit CMT + (CMT[01]) + - "renesas,cmt-48-r8a7791" for the R8A7791 48-bit CMT + (CMT[01]) + - "renesas,cmt-48-gen2" for all second generation 48-bit CMT (CMT[01] on r8a73a4, r8a7790 and r8a7791) + This is a fallback for the renesas,cmt-48-r8a73a4, + renesas,cmt-48-r8a7790 and renesas,cmt-48-gen2 entries. - reg: base address and length of the registers block for the timer module. - interrupts: interrupt-specifier for the timer, one per channel. @@ -36,7 +68,7 @@ Example: R8A7790 (R-Car H2) CMT0 node them channels 0 and 1 in the documentation. cmt0: timer@ffca0000 { - compatible = "renesas,cmt-48-gen2"; + compatible = "renesas,cmt-48-r8a7790", "renesas,cmt-48-gen2"; reg = <0 0xffca0000 0 0x1004>; interrupts = <0 142 IRQ_TYPE_LEVEL_HIGH>, <0 142 IRQ_TYPE_LEVEL_HIGH>;