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 X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7B4F0C43461 for ; Wed, 19 May 2021 11:53:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5908361004 for ; Wed, 19 May 2021 11:53:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1352699AbhESLy6 (ORCPT ); Wed, 19 May 2021 07:54:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33978 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240419AbhESLy5 (ORCPT ); Wed, 19 May 2021 07:54:57 -0400 Received: from mail-il1-x12e.google.com (mail-il1-x12e.google.com [IPv6:2607:f8b0:4864:20::12e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 775E3C0613CE for ; Wed, 19 May 2021 04:53:37 -0700 (PDT) Received: by mail-il1-x12e.google.com with SMTP id h6so11965695ila.7 for ; Wed, 19 May 2021 04:53:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sartura-hr.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=UW7fZiIlXVfl0Qc0/A9Hj0P585Ftj5tVT/omHdWRq4I=; b=xLPFHrobZa2WtMv3ql7wPlAv5Tlyo5PmflSYyt63GdY1dJxV6q/++PoWUU73Vm8I8Q XhykK9d/2gYBEup6fAwa2XK+Umf9GBrejU/zdN/Q5H/8/Fgml0iNnb1gBdWV8iOy8P1v VJBUZDNw3f4iM+zvum6Yav1e8S+RzjRmzu0EQdDYM46bamsvc9oBTDOc27AOk9ZJPMzN hX73g9wxPHDs13xqAScfxHl1X2NLKl1zx/r5cxUNm2PlXAJ2UXr+O1mvsXUmJHXY/j3m t340Ij6y4xra8yVLLznQQEYhjk9BsM/rX0jQObGJQmoKKyBeJyAiwsCqGdNfZvj/t9ir +/cw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=UW7fZiIlXVfl0Qc0/A9Hj0P585Ftj5tVT/omHdWRq4I=; b=ro44mr4ebZYkcM26q0QvXLcIEcR0J3RtDCWet1FRp8qzIpGOQvy85ayE82V3StzNgq ggKAif51E2rXMEfmny/afszDXK1dOaXLlCdmKaizyY1N7MLXsYgHMtidjL8JevIFhoo/ Y25d4QEHDef/dS8dsCrDn0dO7rmZnsbUc+ai1EtKJL3qVxK2Q5ZfDmN/tmL2h4e+3ZtX Z63fGAt4P4o+Rn0XRmxOq+ZLRjjw31q0jM/3vFS5LFOODGOtKdU632X6Hsi4/u7xzjKO TyNxlK0vLUajAkg5u4l9kZkGmmi3E9UF4DWoCqlSOL1hlR3BlosRf9zLExBI2wr58J3f tHSg== X-Gm-Message-State: AOAM533C098rCuBfu177aickrCkyJcvcnRlBa8x2RRtXtlsEXVekmAiU URs4RyDQbDm8W0gO1TkSdqDLniWM3zS7TPNpW5cbvg== X-Google-Smtp-Source: ABdhPJyagVuDl87Slxx3PuzN9OBL7HrQnUxrISgaMw3Gc9dfiRyYygGFfRlU4U4XUgvEtNonmfbMHU8PypFnnAmBhHo= X-Received: by 2002:a92:cf45:: with SMTP id c5mr10915199ilr.182.1621425216452; Wed, 19 May 2021 04:53:36 -0700 (PDT) MIME-Version: 1.0 References: <20210430123511.116057-1-robert.marko@sartura.hr> In-Reply-To: From: Robert Marko Date: Wed, 19 May 2021 13:53:25 +0200 Message-ID: Subject: Re: [PATCH 1/6] mfd: Add Delta TN48M CPLD driver To: Michael Walle Cc: Lee Jones , robh+dt@kernel.org, Linus Walleij , bgolaszewski@baylibre.com, jdelvare@suse.com, Guenter Roeck , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, linux-hwmon@vger.kernel.org, Luka Perkov , jmp@epiphyte.org, Paul Menzel , Donald Buczek Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, May 6, 2021 at 6:34 PM Michael Walle wrote: > > Hi Robert, > > Am 2021-04-30 14:35, schrieb Robert Marko: > > Delta TN48M switches have a Lattice CPLD that serves > > multiple purposes including being a GPIO expander. > > So lets add the MFD core driver for it. > > Did you have a look at mfd/simple-mfd-i2c.c? Hi Michael, Yes, that was my first idea but we have a requirement to expose CPLD information via debugfs as there are userspace applications using it. And simple-mfd-i2c does not allow us to do so. Regards, Robert > > -michael -- Robert Marko Staff Embedded Linux Engineer Sartura Ltd. Lendavska ulica 16a 10000 Zagreb, Croatia Email: robert.marko@sartura.hr Web: www.sartura.hr