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=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED 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 00C84C282C0 for ; Fri, 25 Jan 2019 14:58:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CBE76218A2 for ; Fri, 25 Jan 2019 14:58:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726984AbfAYO6k (ORCPT ); Fri, 25 Jan 2019 09:58:40 -0500 Received: from protonic.xs4all.nl ([83.163.252.89]:50788 "EHLO protonic.nl" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726216AbfAYO6j (ORCPT ); Fri, 25 Jan 2019 09:58:39 -0500 X-Greylist: delayed 350 seconds by postgrey-1.27 at vger.kernel.org; Fri, 25 Jan 2019 09:58:39 EST Received: from erd987 (unknown [192.168.2.69]) by sparta (Postfix) with ESMTP id EA1F844A004C; Fri, 25 Jan 2019 15:54:01 +0100 (CET) Date: Fri, 25 Jan 2019 15:52:48 +0100 From: Robin van der Gracht To: Martin Kepplinger Cc: linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, ulf.hansson@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, linux-imx@nxp.com, linux-kernel@vger.kernel.org, Martin Kepplinger Subject: Re: [PATCH] mmc: mxs-mmc: Introduce regulator support Message-ID: <20190125155248.23937600@erd987> In-Reply-To: <20190125113449.10128-1-martink@posteo.de> References: <20190125113449.10128-1-martink@posteo.de> Organization: Protonic Holland X-Mailer: Claws Mail 3.17.1 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Martin, On Fri, 25 Jan 2019 12:34:49 +0100 Martin Kepplinger wrote: > From: Martin Kepplinger > > This adds support for explicitly switching the mmc's power on and off. > > Signed-off-by: Martin Kepplinger > --- > > This is not my patch. It's taken from https://patchwork.kernel.org/patch/4365751/ > rebased and minimally changed; but we use this. > > Are there any objections to this? > > Robin, can I still add your Signed-off-by to this? Also, should I set you > as the author? It's old, but thanks for keeping me in the loop :) > > thanks, > > martin > > drivers/mmc/host/mxs-mmc.c | 31 +++++++++++++++++++++++-------- > 1 file changed, 23 insertions(+), 8 deletions(-) > > diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c > index add1e70195ea..e3c19fabb723 100644 > --- a/drivers/mmc/host/mxs-mmc.c > +++ b/drivers/mmc/host/mxs-mmc.c > @@ -517,6 +517,26 @@ static void mxs_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) > else > host->bus_width = 0; > > + if (ios->power_mode != host->power_mode) { > + switch (ios->power_mode) { > + case MMC_POWER_OFF: > + if ((host->vmmc) && regulator_disable(host->vmmc)) { > + dev_err(mmc_dev(host->mmc), > + "Failed to disable vmmc regulator\n"); > + } > + break; > + case MMC_POWER_UP: > + if ((host->vmmc) && regulator_enable(host->vmmc)) { > + dev_err(mmc_dev(host->mmc), > + "Failed to enable vmmc regulator\n"); > + } > + break; > + default: > + break; > + } > + host->power_mode = ios->power_mode; > + } > + A single check in the root contitional for the availability of vmmc should suffice, so: if (host->vmmc && ios->power_mode != host->power_mode) { ... case MMC_POWER_XX: if (regulator_xx(host->vmmc)) dev_err; ... > if (ios->clock) > mxs_ssp_set_clk_rate(&host->ssp, ios->clock); > } > @@ -613,16 +633,11 @@ static int mxs_mmc_probe(struct platform_device *pdev) > > host->mmc = mmc; > host->sdio_irq_en = 0; > + host->power_mode = MMC_POWER_OFF; My patch added 'power_mode' and 'vmmc' to the drivers private struct (which are missing in this email?) > > reg_vmmc = devm_regulator_get(&pdev->dev, "vmmc"); > - if (!IS_ERR(reg_vmmc)) { > - ret = regulator_enable(reg_vmmc); > - if (ret) { > - dev_err(&pdev->dev, > - "Failed to enable vmmc regulator: %d\n", ret); > - goto out_mmc_free; > - } > - } > + if (!IS_ERR(reg_vmmc)) > + host->vmmc = reg_vmmc; what about mmc_regulator_get_supply(mmc)? If we use that the vmmc will be made available under mmv->supply->vmmc if probe was successfull instead of storing it in the drivers private struct. > > ssp->clk = devm_clk_get(&pdev->dev, NULL); > if (IS_ERR(ssp->clk)) { Robin van der Gracht