From patchwork Fri Nov 15 11:12:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bough Chen X-Patchwork-Id: 11246101 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4E81E17E0 for ; Fri, 15 Nov 2019 11:14:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2E9CC20730 for ; Fri, 15 Nov 2019 11:14:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726521AbfKOLOt (ORCPT ); Fri, 15 Nov 2019 06:14:49 -0500 Received: from inva020.nxp.com ([92.121.34.13]:44672 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726986AbfKOLOt (ORCPT ); Fri, 15 Nov 2019 06:14:49 -0500 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id A8A491A04EF; Fri, 15 Nov 2019 12:14:46 +0100 (CET) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 679F31A04FD; Fri, 15 Nov 2019 12:14:42 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id D1C4B402FB; Fri, 15 Nov 2019 19:14:36 +0800 (SGT) From: haibo.chen@nxp.com To: adrian.hunter@intel.com, ulf.hansson@linaro.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de Cc: festevam@gmail.com, linux-mmc@vger.kernel.org, linux-imx@nxp.com, haibo.chen@nxp.com Subject: [PATCH 07/14] mmc: sdhci-esdhc-imx: restore the per_clk rate in PM_RUNTIME Date: Fri, 15 Nov 2019 19:12:41 +0800 Message-Id: <1573816361-26535-4-git-send-email-haibo.chen@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1573816361-26535-1-git-send-email-haibo.chen@nxp.com> References: <1573816361-26535-1-git-send-email-haibo.chen@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org From: Haibo Chen When pm_runtime_suspend is run, a call to SCFW power off the SS (SS is a power domain, usdhc belong to this SS power domain) in which the resource resides is made. The SCFW can power off the SS if no other resource in active in that SS. If so, all state associated with all the resources within the SS that is powered off is lost, this includes the clock rates, clock state etc. When pm_runtime_resume is called, the SS associated with that resource is powered up. But the clocks are left in the default state. This patch restore clock rate in pm_runtime_resume, make sure the clock is right rather than depending on the default state setting by SCFW. Signed-off-by: Haibo Chen Acked-by: Adrian Hunter --- drivers/mmc/host/sdhci-esdhc-imx.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 2c8a78218c8e..448b29b2da62 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -162,6 +162,8 @@ #define ESDHC_FLAG_PMQOS BIT(13) /* The IP state got lost in low power mode */ #define ESDHC_FLAG_STATE_LOST_IN_LPMODE BIT(14) +/* The IP lost clock rate in PM_RUNTIME */ +#define ESDHC_FLAG_CLK_RATE_LOST_IN_PM_RUNTIME BIT(15) struct esdhc_soc_data { u32 flags; @@ -225,7 +227,8 @@ static struct esdhc_soc_data usdhc_imx8qxp_data = { | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES | ESDHC_FLAG_CQHCI - | ESDHC_FLAG_STATE_LOST_IN_LPMODE, + | ESDHC_FLAG_STATE_LOST_IN_LPMODE + | ESDHC_FLAG_CLK_RATE_LOST_IN_PM_RUNTIME, }; struct pltfm_imx_data { @@ -1711,6 +1714,9 @@ static int sdhci_esdhc_runtime_resume(struct device *dev) pm_qos_add_request(&imx_data->pm_qos_req, PM_QOS_CPU_DMA_LATENCY, 0); + if (imx_data->socdata->flags & ESDHC_FLAG_CLK_RATE_LOST_IN_PM_RUNTIME) + clk_set_rate(imx_data->clk_per, pltfm_host->clock); + err = clk_prepare_enable(imx_data->clk_ahb); if (err) goto remove_pm_qos_request;