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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ED850C46467 for ; Wed, 4 Jan 2023 16:14:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239914AbjADQOy (ORCPT ); Wed, 4 Jan 2023 11:14:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239877AbjADQOj (ORCPT ); Wed, 4 Jan 2023 11:14:39 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1ED9341D77 for ; Wed, 4 Jan 2023 08:14:07 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id ADF4D6179F for ; Wed, 4 Jan 2023 16:14:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A309AC433D2; Wed, 4 Jan 2023 16:14:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1672848846; bh=EG94yDk3p9gBjrX3vaY88CsBNJcK0tVoHICSCY6KvSE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r5n0aHdvQedv9P9kDN5k0w25jqwPf8LGSk5zh67ZM5Cd/Z15NEpjWl4L83C29U89t xyVMTzKE1JaQd9Ck/oHTg7U6xBzDr9E0nOW3o2e36NjbYGHGtH5lYCpYiDaxwxwF3/ j/BSfQzCgzkjbdMUQ5VsWkx88Kg85hYNSofLGJm4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Wenchao Chen , Ulf Hansson Subject: [PATCH 6.0 015/177] mmc: sdhci-sprd: Disable CLK_AUTO when the clock is less than 400K Date: Wed, 4 Jan 2023 17:05:06 +0100 Message-Id: <20230104160508.119018476@linuxfoundation.org> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230104160507.635888536@linuxfoundation.org> References: <20230104160507.635888536@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Wenchao Chen commit ff874dbc4f868af128b412a9bd92637103cf11d7 upstream. When the clock is less than 400K, some SD cards fail to initialize because CLK_AUTO is enabled. Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller") Signed-off-by: Wenchao Chen Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20221207051909.32126-1-wenchao.chen@unisoc.com Signed-off-by: Ulf Hansson Signed-off-by: Greg Kroah-Hartman --- drivers/mmc/host/sdhci-sprd.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) --- a/drivers/mmc/host/sdhci-sprd.c +++ b/drivers/mmc/host/sdhci-sprd.c @@ -228,13 +228,15 @@ static inline void _sdhci_sprd_set_clock div = ((div & 0x300) >> 2) | ((div & 0xFF) << 8); sdhci_enable_clk(host, div); - /* enable auto gate sdhc_enable_auto_gate */ - val = sdhci_readl(host, SDHCI_SPRD_REG_32_BUSY_POSI); - mask = SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN | - SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN; - if (mask != (val & mask)) { - val |= mask; - sdhci_writel(host, val, SDHCI_SPRD_REG_32_BUSY_POSI); + /* Enable CLK_AUTO when the clock is greater than 400K. */ + if (clk > 400000) { + val = sdhci_readl(host, SDHCI_SPRD_REG_32_BUSY_POSI); + mask = SDHCI_SPRD_BIT_OUTR_CLK_AUTO_EN | + SDHCI_SPRD_BIT_INNR_CLK_AUTO_EN; + if (mask != (val & mask)) { + val |= mask; + sdhci_writel(host, val, SDHCI_SPRD_REG_32_BUSY_POSI); + } } }