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=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 77C13ECE58E for ; Sat, 12 Oct 2019 05:19:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 518CB2190F for ; Sat, 12 Oct 2019 05:19:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=zoho.com header.i=zhouyanjie@zoho.com header.b="ZPkcFFI2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728774AbfJLFTf (ORCPT ); Sat, 12 Oct 2019 01:19:35 -0400 Received: from sender4-pp-o94.zoho.com ([136.143.188.94]:25464 "EHLO sender4-pp-o94.zoho.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726821AbfJLFTf (ORCPT ); Sat, 12 Oct 2019 01:19:35 -0400 ARC-Seal: i=1; a=rsa-sha256; t=1570857550; cv=none; d=zoho.com; s=zohoarc; b=SZoeCaq43vnqx636xq+d47jFuUOHkcg3B3mFBDdKoXePF+YYEipoFtgftohELNivwKQSwpZJeKHbXgTpahcZ5NEWYl5FFcB8qbksAgVy9UIC0naGAzhbVjsKw3WtVc5wdW6HzujreC5Ho3BlsPEyTmNlZ17KsM6b7wj5uUcIwmM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1570857550; h=Cc:Date:From:In-Reply-To:Message-ID:References:Subject:To; bh=kNG3xydqXngTUammBkGfvZpeHfz2ntKv8HXBufYT2PU=; b=oHGZd7rKEg2V+9sz360ucoNevX8ReblPtCkUFRrMkFHKZVDeFi5A69oHBI0Xv6fGXVRSBKx+xUaxaUE5ilM6JwyzQfs7dSdy2B4ONCY0xZtB11mXjUwnquxcn4RsatbTNKnWi6RrCPOjlvuZRSTn3p/ZdbUlTr058XemhnvyIZI= ARC-Authentication-Results: i=1; mx.zoho.com; dkim=pass header.i=zoho.com; spf=pass smtp.mailfrom=zhouyanjie@zoho.com; dmarc=pass header.from= header.from= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=zapps768; d=zoho.com; h=from:to:cc:subject:date:message-id:in-reply-to:references; b=W4EYP2ghWrGTzbWrXYfkSVRYDM2+j9JrS6EYzDpUKqReNndFaNr9vp1Lw9CdhpQWlpikPBb4ikUd G6gEwG1rmtGrFmqGgUiHUeokH0Sqpi7Jg3MdQTZxN+2NZ1b2hDuf DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1570857550; s=zm2019; d=zoho.com; i=zhouyanjie@zoho.com; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References; l=1745; bh=kNG3xydqXngTUammBkGfvZpeHfz2ntKv8HXBufYT2PU=; b=ZPkcFFI2knRCYCAk3/tUuE3fLp/aaG1cAQTX+jBhb9VoHdO2nZHvsda1DlmA0sqQ 5rFp3iaZ3U230t8A1yJD04q+kPLpcqRuYYr/xMoghCeOVyuywO8ExyhP7f1g2SPimYH vuo8/F2r+XLTpYqyz50LG+iHCHLYigb/X89o2tC4= Received: from zhouyanjie-virtual-machine.localdomain (182.148.156.27 [182.148.156.27]) by mx.zohomail.com with SMTPS id 1570857550559909.507456529966; Fri, 11 Oct 2019 22:19:10 -0700 (PDT) From: Zhou Yanjie To: linux-mips@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org, paul.burton@mips.com, mark.rutland@arm.com, syq@debian.org, ulf.hansson@linaro.org, linus.walleij@linaro.org, armijn@tjaldur.nl, tglx@linutronix.de, yuehaibing@huawei.com, malat@debian.org, ezequiel@collabora.com, paul@crapouillou.net Subject: [PATCH 6/6 v2] MMC: JZ4740: Add support for LPM. Date: Sat, 12 Oct 2019 13:13:20 +0800 Message-Id: <1570857203-49192-7-git-send-email-zhouyanjie@zoho.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1570857203-49192-1-git-send-email-zhouyanjie@zoho.com> References: <1567669089-88693-1-git-send-email-zhouyanjie@zoho.com> <1570857203-49192-1-git-send-email-zhouyanjie@zoho.com> X-ZohoMailClient: External Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org add support for low power mode of Ingenic's MMC/SD Controller. Signed-off-by: Zhou Yanjie --- drivers/mmc/host/jz4740_mmc.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c index 44a04fe..4cbe7fb 100644 --- a/drivers/mmc/host/jz4740_mmc.c +++ b/drivers/mmc/host/jz4740_mmc.c @@ -43,6 +43,7 @@ #define JZ_REG_MMC_RESP_FIFO 0x34 #define JZ_REG_MMC_RXFIFO 0x38 #define JZ_REG_MMC_TXFIFO 0x3C +#define JZ_REG_MMC_LPM 0x40 #define JZ_REG_MMC_DMAC 0x44 #define JZ_MMC_STRPCL_EXIT_MULTIPLE BIT(7) @@ -102,6 +103,12 @@ #define JZ_MMC_DMAC_DMA_SEL BIT(1) #define JZ_MMC_DMAC_DMA_EN BIT(0) +#define JZ_MMC_LPM_DRV_RISING BIT(31) +#define JZ_MMC_LPM_DRV_RISING_QTR_PHASE_DLY BIT(31) +#define JZ_MMC_LPM_DRV_RISING_1NS_DLY BIT(30) +#define JZ_MMC_LPM_SMP_RISING_QTR_OR_HALF_PHASE_DLY BIT(29) +#define JZ_MMC_LPM_LOW_POWER_MODE_EN BIT(0) + #define JZ_MMC_CLK_RATE 24000000 enum jz4740_mmc_version { @@ -860,6 +867,22 @@ static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate) } writew(div, host->base + JZ_REG_MMC_CLKRT); + + if (real_rate > 25000000) { + if (host->version >= JZ_MMC_X1000) { + writel(JZ_MMC_LPM_DRV_RISING_QTR_PHASE_DLY | + JZ_MMC_LPM_SMP_RISING_QTR_OR_HALF_PHASE_DLY | + JZ_MMC_LPM_LOW_POWER_MODE_EN, + host->base + JZ_REG_MMC_LPM); + } else if (host->version >= JZ_MMC_JZ4760) { + writel(JZ_MMC_LPM_DRV_RISING | + JZ_MMC_LPM_LOW_POWER_MODE_EN, + host->base + JZ_REG_MMC_LPM); + } else if (host->version >= JZ_MMC_JZ4725B) + writel(JZ_MMC_LPM_LOW_POWER_MODE_EN, + host->base + JZ_REG_MMC_LPM); + } + return real_rate; } -- 2.7.4