From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1153886-1521805265-2-18109044492663937194 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1521805265; b=jZIi01L5QKCZvwnchZ7kXOoC2OEvn4qozITzM2GZ8zRBeku TsaYbL5uHXOFgHqtRCEain7lJ6kVMiY9xxecn7ni8sa5IknrVEQUsHwezMmeralY OrEsTmx8Nuidbik2TfU+TZtUYrgf+XwGrWacOLMV4Tk4arPCIUSB5Cm/Npz0ChIN q6CFq/mtdLpM1ASk0fXbHO2zsK4a5yoqyV+yKSlw2SeEXoONxpTqyONG4IPwvBZa bnk6M4mkWX0xFq+94i+zx8g0xQKOU2UV0wf+WHneSdQuvazXRG2mqkEapkO9XYum SXEtiFbD2g7WTvBcNn9+rmJHBueLduzUh80/HBw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=arctest; t=1521805265; bh=V0M3wHDvc2ZydNfVWgREiRGyRc F3h0o4OdEgE9LUWDw=; b=BeJ0A+igTfWvYN6Khs7Z0kBi9dtfMtQGvQt8swB4AU Y1Jtwk2dineUAljxRB33zmC4xX1cjRjS7/mYbFawRHZ54tyAwfs4ibO7WytljDSh UyYqWZaMa9fFHknq4cwFHMvAEzsZsvx0MiEWDEcdqUYNR+l0x5Up8hkuEOyLj/XV o/0rUzHgxJwEA2Pp+Jtj3QHpr2oJR8Ci02mfxesWsOxDaB1aBbIsqt3Jz6bo+aj3 ybpSZjG/RjDYa/1XY2shXUE5oDiJO8BETf79gyyUfCVOkSmUpsOlfb9OEthmyIvl jL5krtCGrBCWhbeLXZT18vwdr38AZw9QxLHj0Cz+PQHw== ARC-Authentication-Results: i=1; mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx4.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754572AbeCWKEG (ORCPT ); Fri, 23 Mar 2018 06:04:06 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:39032 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754604AbeCWKEF (ORCPT ); Fri, 23 Mar 2018 06:04:05 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lars-Peter Clausen , Stephen Boyd , Sasha Levin Subject: [PATCH 4.14 63/77] clk: axi-clkgen: Correctly handle nocount bit in recalc_rate() Date: Fri, 23 Mar 2018 10:54:37 +0100 Message-Id: <20180323094146.513285580@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180323094142.260022880@linuxfoundation.org> References: <20180323094142.260022880@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Lars-Peter Clausen [ Upstream commit 063578dc5f407f67d149133818efabe457daafda ] If the nocount bit is set the divider is bypassed and the settings for the divider count should be ignored and a divider value of 1 should be assumed. Handle this correctly in the driver recalc_rate() callback. While the driver sets up the part so that the read back dividers values yield the correct result the power-on reset settings of the part might not reflect this and hence calling e.g. clk_get_rate() without prior calls to clk_set_rate() will yield the wrong result. Signed-off-by: Lars-Peter Clausen Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/clk/clk-axi-clkgen.c | 29 ++++++++++++++++++++++++----- 1 file changed, 24 insertions(+), 5 deletions(-) --- a/drivers/clk/clk-axi-clkgen.c +++ b/drivers/clk/clk-axi-clkgen.c @@ -40,6 +40,10 @@ #define MMCM_REG_FILTER1 0x4e #define MMCM_REG_FILTER2 0x4f +#define MMCM_CLKOUT_NOCOUNT BIT(6) + +#define MMCM_CLK_DIV_NOCOUNT BIT(12) + struct axi_clkgen { void __iomem *base; struct clk_hw clk_hw; @@ -315,12 +319,27 @@ static unsigned long axi_clkgen_recalc_r unsigned int reg; unsigned long long tmp; - axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLKOUT0_1, ®); - dout = (reg & 0x3f) + ((reg >> 6) & 0x3f); + axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLKOUT0_2, ®); + if (reg & MMCM_CLKOUT_NOCOUNT) { + dout = 1; + } else { + axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLKOUT0_1, ®); + dout = (reg & 0x3f) + ((reg >> 6) & 0x3f); + } + axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLK_DIV, ®); - d = (reg & 0x3f) + ((reg >> 6) & 0x3f); - axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLK_FB1, ®); - m = (reg & 0x3f) + ((reg >> 6) & 0x3f); + if (reg & MMCM_CLK_DIV_NOCOUNT) + d = 1; + else + d = (reg & 0x3f) + ((reg >> 6) & 0x3f); + + axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLK_FB2, ®); + if (reg & MMCM_CLKOUT_NOCOUNT) { + m = 1; + } else { + axi_clkgen_mmcm_read(axi_clkgen, MMCM_REG_CLK_FB1, ®); + m = (reg & 0x3f) + ((reg >> 6) & 0x3f); + } if (d == 0 || dout == 0) return 0;