From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A683ECAAD8 for ; Fri, 26 Aug 2022 21:54:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242352AbiHZVyi (ORCPT ); Fri, 26 Aug 2022 17:54:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231216AbiHZVyg (ORCPT ); Fri, 26 Aug 2022 17:54:36 -0400 Received: from mail-yw1-x1136.google.com (mail-yw1-x1136.google.com [IPv6:2607:f8b0:4864:20::1136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B7B9795BB for ; Fri, 26 Aug 2022 14:54:34 -0700 (PDT) Received: by mail-yw1-x1136.google.com with SMTP id 00721157ae682-33dc345ad78so68470927b3.3 for ; Fri, 26 Aug 2022 14:54:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc; bh=iD+oDgmA+uqkgZAjiZVwNKXzpAuCVIysHt0xaw4YizU=; b=Ca+dkdvTTZAOLDvgw3Z9TkaUnMZcEWn4NTxm5+zjenuU2n7vyLOc9KPh6+KdZ5gwBJ tn/9thf3hXLJO9QmMCTrPu9UeA9bqXKkdHcD3t26KAQo8P0j/mO2Wsp3546vXy2g5DVe 7hsSOEj3K89mu/jqNLHDZpbjrvMfyUGLE++bdQHX7CDFGQhtlU3YxsNnf8kvVYpVHf5L lxVu/SLHlqgK0HT7NNi6O08XfosRfNiRI1W7yI7n62C0LRD+iwPjN2kz2hv3wdQVmP8E SrxuPd7hPHS0iDGfnSjx5LwMaLY9kxqbUtS5dWAWogDi+uOzyJWbWoS9ExFdkez6KFbW ThmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc; bh=iD+oDgmA+uqkgZAjiZVwNKXzpAuCVIysHt0xaw4YizU=; b=M8yX28rVFB6dP6EMmwLGcUflGBYKvP874ZOMx/IpRw/mVLq48xJjWMtyZVNvwGzxV7 AYAFzWdM8ZHVQAnFwFCKOAaPvaBzcNlzOIJC2C0rZg3XSaOhIZwQd9p1ONOGBl+ma97a whDbDy9ts3O/YmerZSrLCHmpiOU9sjZTYNOYmbIb26XHOX/ZL8v5dE3KyDSBjZi6f5wI gcX65AqeGlxofzH0mLZ7QNQ/TcQoUYXLDjMjgl6uJefHZHjFRgkdvrQMZwDUun4iJwhF 2Ewxth6/A6mLNBVjBAKkT7eZ9nnR1BaP9kHwJB65aenQosNhZXago0cwvYiSI1p4R7M+ B3vQ== X-Gm-Message-State: ACgBeo0a5cRqBGzMVw9i4v2M5ioj5O7GaQfuDQmJlfDs1VTPQBul/Rfs 8l5NWfMxYN+dZc/ekBLU5obm4PX6+63o/0y6PcrpgQ== X-Google-Smtp-Source: AA6agR6/Js/n7u8uAt+Vs5/9brwPzqXD8oV9j9u5xOFLL3KiwQvGzqQugDWZuWB0GKL5dR3cPMdqCyb0gjesC5DDHLQ= X-Received: by 2002:a25:7902:0:b0:67b:d842:1184 with SMTP id u2-20020a257902000000b0067bd8421184mr1609196ybc.374.1661550874022; Fri, 26 Aug 2022 14:54:34 -0700 (PDT) MIME-Version: 1.0 References: <87f2ff4c-3426-201c-df86-2d06d3587a20@csgroup.eu> In-Reply-To: From: Linus Walleij Date: Fri, 26 Aug 2022 23:54:22 +0200 Message-ID: Subject: Re: [PATCH] gpio: Allow user to customise maximum number of GPIOs To: Christophe Leroy Cc: Arnd Bergmann , Alexandre Courbot , Alexandre Courbot , Bartosz Golaszewski , Jonathan Corbet , Russell King , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "H. Peter Anvin" , "open list:GPIO SUBSYSTEM" , "open list:DOCUMENTATION" , open list , "moderated list:ARM PORT" , "open list:GENERIC INCLUDE/ASM HEADER FILES" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 26, 2022 at 5:08 PM Christophe Leroy wrote: > Le 26/08/2022 =C3=A0 15:49, Linus Walleij a =C3=A9crit : > > On Thu, Aug 25, 2022 at 4:00 PM Christophe Leroy > > wrote: > > > >>> Christophe? Will you take a stab at it? > >> > >> Which patch should I write ? > > > > One that removes CONFIG_ARCH_HAS_NR_GPIO entirely, then > > allocate bases for new GPIO chips from 0 and upward instead. > > And then see what happens. > > > > Ok, I can give it a try. Nice! > But what do I do with: > > drivers/gpio/gpio-aggregator.c: bitmap =3D bitmap_alloc(ARCH_NR_GPIOS, > GFP_KERNEL); That's just used locally in that driver to loop over the arguments to the aggregator (from the file in sysfs). I would set some arbitrary root like #define AGGREGATOR_MAX_GPIOS 512 and just search/replace with that. Yours, Linus Walleij