From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751907AbdIVGAz (ORCPT ); Fri, 22 Sep 2017 02:00:55 -0400 Received: from conuserg-07.nifty.com ([210.131.2.74]:60680 "EHLO conuserg-07.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751838AbdIVGAx (ORCPT ); Fri, 22 Sep 2017 02:00:53 -0400 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com v8M5wUuZ007666 X-Nifty-SrcIP: [153.142.97.92] From: Masahiro Yamada To: linux-mtd@lists.infradead.org Cc: Oleksij Rempel , Dinh Nguyen , Masahiro Yamada , Cyrille Pitchen , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Boris Brezillon , Marek Vasut , Brian Norris , Richard Weinberger , David Woodhouse , Rob Herring , Mark Rutland Subject: [PATCH v2] dt-bindings: nand: denali: reduce the register space in the example Date: Fri, 22 Sep 2017 14:58:23 +0900 Message-Id: <1506059903-15552-1-git-send-email-yamada.masahiro@socionext.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This example allocates much more than needed for address regions. As for "denali_reg", as you see in drivers/mtd/nand/denali.h, all registers fit in 0x1000. As for "nand_data", this IP is generally configured to use Indexed Addressing mode, where there are only two registers in the address translation module (CTRL: 0x00, DATA: 0x10). Altera SOCFPGA is also this case. So, 0x20 is enough. Signed-off-by: Masahiro Yamada Acked-by: Rob Herring --- Changes in v2: - Add a little more explanation for rationale of this patch Documentation/devicetree/bindings/mtd/denali-nand.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/mtd/denali-nand.txt b/Documentation/devicetree/bindings/mtd/denali-nand.txt index 504291d..0ee8edb 100644 --- a/Documentation/devicetree/bindings/mtd/denali-nand.txt +++ b/Documentation/devicetree/bindings/mtd/denali-nand.txt @@ -29,7 +29,7 @@ nand: nand@ff900000 { #address-cells = <1>; #size-cells = <1>; compatible = "altr,socfpga-denali-nand"; - reg = <0xff900000 0x100000>, <0xffb80000 0x10000>; + reg = <0xff900000 0x20>, <0xffb80000 0x1000>; reg-names = "nand_data", "denali_reg"; interrupts = <0 144 4>; }; -- 2.7.4