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=-7.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 5BD73C433DF for ; Mon, 10 Aug 2020 07:31:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3BA9F2078D for ; Mon, 10 Aug 2020 07:31:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=walle.cc header.i=@walle.cc header.b="RskBIHUq" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726537AbgHJHbt (ORCPT ); Mon, 10 Aug 2020 03:31:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47964 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726331AbgHJHbt (ORCPT ); Mon, 10 Aug 2020 03:31:49 -0400 Received: from ssl.serverraum.org (ssl.serverraum.org [IPv6:2a01:4f8:151:8464::1:2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CDBA0C061756; Mon, 10 Aug 2020 00:31:48 -0700 (PDT) Received: from ssl.serverraum.org (web.serverraum.org [172.16.0.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ssl.serverraum.org (Postfix) with ESMTPSA id EDE7F22ED5; Mon, 10 Aug 2020 09:31:38 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=walle.cc; s=mail2016061301; t=1597044704; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=5klQWMMHU8Ee9M3fQmjdVoNMXn8r8NKjAB/+jN2Z22o=; b=RskBIHUqm9dJEuq24ixJy/wnCPI1k+LlLwGD3YDaMNrIxpT7alp+IYBbidU9g/DDYL17L4 +i3UjQC+yZJzfyR+7fP0K9WgOcXXb0uA7lTIZWVLIgGcL8iORxooes7NnEN1Xjqmv1M1tg UbCyOZUMcttJxhVpPMjuSDQ4j3mrgTQ= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Date: Mon, 10 Aug 2020 09:31:38 +0200 From: Michael Walle To: Lee Jones Cc: =?UTF-8?Q?Uwe_Kleine-K=C3=B6nig?= , linux-gpio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-pwm@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Linus Walleij , Bartosz Golaszewski , Rob Herring , Jean Delvare , Guenter Roeck , Thierry Reding , Wim Van Sebroeck , Shawn Guo , Li Yang , Thomas Gleixner , Jason Cooper , Marc Zyngier , Mark Brown , Greg Kroah-Hartman , Andy Shevchenko , Catalin Marinas , Will Deacon , Pavel Machek Subject: Re: [PATCH v7 06/13] pwm: add support for sl28cpld PWM controller In-Reply-To: <20200810071328.GB4411@dell> References: <20200803093559.12289-1-michael@walle.cc> <20200803093559.12289-7-michael@walle.cc> <20200806084000.k3aj5nmqdodmb35v@pengutronix.de> <20200810071328.GB4411@dell> User-Agent: Roundcube Webmail/1.4.7 Message-ID: <2ca0a3a3f03a1f5b9b2777738824123b@walle.cc> X-Sender: michael@walle.cc Sender: linux-watchdog-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org Am 2020-08-10 09:13, schrieb Lee Jones: > On Fri, 07 Aug 2020, Michael Walle wrote: > >> Hi Uwe, Hi Lee, >> >> Am 2020-08-06 10:40, schrieb Uwe Kleine-König: >> > On Mon, Aug 03, 2020 at 11:35:52AM +0200, Michael Walle wrote: >> > > diff --git a/drivers/pwm/Kconfig b/drivers/pwm/Kconfig >> > > index 7dbcf6973d33..a0d50d70c3b9 100644 >> > > --- a/drivers/pwm/Kconfig >> > > +++ b/drivers/pwm/Kconfig >> > > @@ -428,6 +428,16 @@ config PWM_SIFIVE >> > > To compile this driver as a module, choose M here: the module >> > > will be called pwm-sifive. >> > > >> > > +config PWM_SL28CPLD >> > > + tristate "Kontron sl28cpld PWM support" >> > > + select MFD_SIMPLE_MFD_I2C >> > >> > Is it sensible to present this option to everyone? Maybe >> > >> > depends on SOME_SYMBOL_ONLY_TRUE_ON_SL28CPLD || COMPILE_TEST >> >> Because there is now no real MFD driver anymore, there is also >> no symbol for that. The closest would be ARCH_ARM64 but I don't >> think that is a good idea. >> >> Lee, what do you think about adding a symbol to the MFD, which >> selects MFD_SIMPLE_MFD_I2C but doesn't enable any C modules? >> >> I.e. >> config MFD_SL28CPLD >> tristate "Kontron sl28cpld" >> select MFD_SIMPLE_MFD_I2C >> help >> Say yes here to add support for the Kontron sl28cpld board >> management controller. >> >> Then all the other device driver could depend on the MFD_SL28CPLD >> symbol. > > You want to add a virtual symbol to prevent having to present a real > one? How is that a reasonable solution? (1) Its a symbol on which all sl28cpld will depend on. Thus they will all be hidden if that is not set. (2) the drivers itself wouldn't need to depend on MFD_SIMPLE_MFD_I2C, which is more correct, because they don't have anything to do with i2c. -michael