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=-8.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 autolearn=unavailable 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 7C0A1C43141 for ; Sat, 16 Nov 2019 16:25:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 54CEB218A3 for ; Sat, 16 Nov 2019 16:25:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573921534; bh=tKlAqIyvgm/BFvXM2Gzz+MPd2tkf5PYpf/ev0HUdeHY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:List-ID:From; b=UWcO3Ajh4KYPC4tbzfneiXSV/bt3wgEfE/0bsYXB4buIh1yYVxXst4n0zHsg2Ny6V LEZal5bPNAzOi2Kk7rkLBAoxbXhfLQi8KOWA2MFI34D2BqI4zNIXlXUkr27M65GeGZ ud1n9/Cyca3vM+AyzQY/rvzO2xUY8KiyCywezTnQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728150AbfKPQZd (ORCPT ); Sat, 16 Nov 2019 11:25:33 -0500 Received: from mail.kernel.org ([198.145.29.99]:46186 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727737AbfKPQZ2 (ORCPT ); Sat, 16 Nov 2019 11:25:28 -0500 Received: from archlinux (cpc149474-cmbg20-2-0-cust94.5-4.cable.virginm.net [82.4.196.95]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1E3C821844; Sat, 16 Nov 2019 16:25:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573921527; bh=tKlAqIyvgm/BFvXM2Gzz+MPd2tkf5PYpf/ev0HUdeHY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=UODgzqzWaywxJGPpgNbLnK2smJSPt5HlG68zONKsKA6sF6efou8n7XUF5B3SbdvI3 mXBluCOmsPqBSm86Ungf7+VXXrrHRydQ6DLHZOW2wyl0J2u95J7OEGZOp9s415P9wY 7DhWKJkwoFFSIHF4oxNnBLfH9qPOzu3SRgMv2NO4= Date: Sat, 16 Nov 2019 16:25:22 +0000 From: Jonathan Cameron To: Niklas =?UTF-8?B?U8O2ZGVybHVuZA==?= Cc: Geert Uytterhoeven , Jacopo Mondi , Hartmut Knaack , Lars-Peter Clausen , Peter Meerwald-Stadler , linux-iio@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: Re: [PATCH] iio: adc: max9611: Make enum relations more future proof Message-ID: <20191116162522.1e68243c@archlinux> In-Reply-To: <20191114072803.GC26902@bigcity.dyn.berto.se> References: <20191113100938.27604-1-geert+renesas@glider.be> <20191114072803.GC26902@bigcity.dyn.berto.se> X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org On Thu, 14 Nov 2019 08:28:03 +0100 Niklas S=C3=B6derlund wrote: > Hi Geert, >=20 > Looks good. >=20 > On 2019-11-13 11:09:38 +0100, Geert Uytterhoeven wrote: > > The relations between enum values and array indices values are currently > > not enforced by the code, which makes them fragile w.r.t. future > > changes. > >=20 > > Fix this by: > > 1. Using designated array initializers, to make sure array indices and > > enums values match, > > 2. Linking max9611_csa_gain enum values to the corresponding > > max9611_conf_ids enum values, as the latter is cast to the former > > in max9611_read_csa_voltage(). > >=20 > > No change in generated code. > >=20 > > Signed-off-by: Geert Uytterhoeven =20 >=20 > Reviewed-by: Niklas S=C3=B6derlund Looks good to me, but I'd like to leave a little longer for any feedback from Jacopo as author of the driver. Thanks, Jonathan >=20 > > --- > > drivers/iio/adc/max9611.c | 36 +++++++++++------------------------- > > 1 file changed, 11 insertions(+), 25 deletions(-) > >=20 > > diff --git a/drivers/iio/adc/max9611.c b/drivers/iio/adc/max9611.c > > index b0755f25356d700d..cb306ff1a5d6a0b2 100644 > > --- a/drivers/iio/adc/max9611.c > > +++ b/drivers/iio/adc/max9611.c > > @@ -114,22 +114,17 @@ enum max9611_conf_ids { > > * where data shall be read from > > */ > > static const unsigned int max9611_mux_conf[][2] =3D { > > - /* CONF_SENSE_1x */ > > - { MAX9611_MUX_SENSE_1x, MAX9611_REG_CSA_DATA }, > > - /* CONF_SENSE_4x */ > > - { MAX9611_MUX_SENSE_4x, MAX9611_REG_CSA_DATA }, > > - /* CONF_SENSE_8x */ > > - { MAX9611_MUX_SENSE_8x, MAX9611_REG_CSA_DATA }, > > - /* CONF_IN_VOLT */ > > - { MAX9611_INPUT_VOLT, MAX9611_REG_RS_DATA }, > > - /* CONF_TEMP */ > > - { MAX9611_MUX_TEMP, MAX9611_REG_TEMP_DATA }, > > + [CONF_SENSE_1x] =3D { MAX9611_MUX_SENSE_1x, MAX9611_REG_CSA_DATA }, > > + [CONF_SENSE_4x] =3D { MAX9611_MUX_SENSE_4x, MAX9611_REG_CSA_DATA }, > > + [CONF_SENSE_8x] =3D { MAX9611_MUX_SENSE_8x, MAX9611_REG_CSA_DATA }, > > + [CONF_IN_VOLT] =3D { MAX9611_INPUT_VOLT, MAX9611_REG_RS_DATA }, > > + [CONF_TEMP] =3D { MAX9611_MUX_TEMP, MAX9611_REG_TEMP_DATA }, > > }; > > =20 > > enum max9611_csa_gain { > > - CSA_GAIN_1x, > > - CSA_GAIN_4x, > > - CSA_GAIN_8x, > > + CSA_GAIN_1x =3D CONF_SENSE_1x, > > + CSA_GAIN_4x =3D CONF_SENSE_4x, > > + CSA_GAIN_8x =3D CONF_SENSE_8x, > > }; > > =20 > > enum max9611_csa_gain_params { > > @@ -147,18 +142,9 @@ enum max9611_csa_gain_params { > > * value; use this structure to retrieve the correct LSB and offset va= lues. > > */ > > static const unsigned int max9611_gain_conf[][2] =3D { > > - { /* [0] CSA_GAIN_1x */ > > - MAX9611_CSA_1X_LSB_nV, > > - MAX9611_CSA_1X_OFFS_RAW, > > - }, > > - { /* [1] CSA_GAIN_4x */ > > - MAX9611_CSA_4X_LSB_nV, > > - MAX9611_CSA_4X_OFFS_RAW, > > - }, > > - { /* [2] CSA_GAIN_8x */ > > - MAX9611_CSA_8X_LSB_nV, > > - MAX9611_CSA_8X_OFFS_RAW, > > - }, > > + [CSA_GAIN_1x] =3D { MAX9611_CSA_1X_LSB_nV, MAX9611_CSA_1X_OFFS_RAW, }, > > + [CSA_GAIN_4x] =3D { MAX9611_CSA_4X_LSB_nV, MAX9611_CSA_4X_OFFS_RAW, }, > > + [CSA_GAIN_8x] =3D { MAX9611_CSA_8X_LSB_nV, MAX9611_CSA_8X_OFFS_RAW, }, > > }; > > =20 > > enum max9611_chan_addrs { > > --=20 > > 2.17.1 > > =20 >=20