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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 E72E8C433DF for ; Thu, 18 Jun 2020 02:34:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C70D0206E2 for ; Thu, 18 Jun 2020 02:34:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592447698; bh=yxjlZXBHSwssaqDKkjpPc3u3wRsrsKwzGkwMtEVmXMw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OxSe3OiE5kBOpVQvjfVsf7lh+RflI9chGInktjUcw3Qkq4NTEJLiNSSpmC1uYl2uv upRGdyX8RD9U2IvEssIOBnHYJ7zYwTImccfIw3UG13wqK0sXoVfYifWntmi4jRC5d1 QcHjRaqiA1D7VRxb1UYs1JKlMV9PMNKQS64nFNGo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728262AbgFRCe4 (ORCPT ); Wed, 17 Jun 2020 22:34:56 -0400 Received: from mail.kernel.org ([198.145.29.99]:44054 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727777AbgFRBOX (ORCPT ); Wed, 17 Jun 2020 21:14:23 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 136B9221F0; Thu, 18 Jun 2020 01:14:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592442862; bh=yxjlZXBHSwssaqDKkjpPc3u3wRsrsKwzGkwMtEVmXMw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tThE2/P6lgln4Nj0KFtkreybaiC0tWn/b2VYDR/5lYndMbdPvZkU2VK/6tSrYqDJm KOmHiWbh2+wXA+1MGVS+PDtfBNVu0HNhQkhx4gsNvCbIEbnBgYPblwZaLwsOJ/S5VR J+dbygA3/XSQk3vZTar4SrQ4FImtshLKft+ibHwE= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eddie James , Stephen Boyd , Sasha Levin , linux-clk@vger.kernel.org Subject: [PATCH AUTOSEL 5.7 291/388] clk: ast2600: Fix AHB clock divider for A1 Date: Wed, 17 Jun 2020 21:06:28 -0400 Message-Id: <20200618010805.600873-291-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200618010805.600873-1-sashal@kernel.org> References: <20200618010805.600873-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org From: Eddie James [ Upstream commit 2d491066ccd4286538450c227fc5094ceb04b494 ] The latest specs for the AST2600 A1 chip include some different bit definitions for calculating the AHB clock divider. Implement these in order to get the correct AHB clock value in Linux. Signed-off-by: Eddie James Link: https://lkml.kernel.org/r/20200408203616.4031-1-eajames@linux.ibm.com Fixes: d3d04f6c330a ("clk: Add support for AST2600 SoC") Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/clk-ast2600.c | 31 +++++++++++++++++++++++++------ 1 file changed, 25 insertions(+), 6 deletions(-) diff --git a/drivers/clk/clk-ast2600.c b/drivers/clk/clk-ast2600.c index 392d01705b97..99afc949925f 100644 --- a/drivers/clk/clk-ast2600.c +++ b/drivers/clk/clk-ast2600.c @@ -642,14 +642,22 @@ static const u32 ast2600_a0_axi_ahb_div_table[] = { 2, 2, 3, 5, }; -static const u32 ast2600_a1_axi_ahb_div_table[] = { - 4, 6, 2, 4, +static const u32 ast2600_a1_axi_ahb_div0_tbl[] = { + 3, 2, 3, 4, +}; + +static const u32 ast2600_a1_axi_ahb_div1_tbl[] = { + 3, 4, 6, 8, +}; + +static const u32 ast2600_a1_axi_ahb200_tbl[] = { + 3, 4, 3, 4, 2, 2, 2, 2, }; static void __init aspeed_g6_cc(struct regmap *map) { struct clk_hw *hw; - u32 val, div, chip_id, axi_div, ahb_div; + u32 val, div, divbits, chip_id, axi_div, ahb_div; clk_hw_register_fixed_rate(NULL, "clkin", NULL, 0, 25000000); @@ -679,11 +687,22 @@ static void __init aspeed_g6_cc(struct regmap *map) else axi_div = 2; + divbits = (val >> 11) & 0x3; regmap_read(map, ASPEED_G6_SILICON_REV, &chip_id); - if (chip_id & BIT(16)) - ahb_div = ast2600_a1_axi_ahb_div_table[(val >> 11) & 0x3]; - else + if (chip_id & BIT(16)) { + if (!divbits) { + ahb_div = ast2600_a1_axi_ahb200_tbl[(val >> 8) & 0x3]; + if (val & BIT(16)) + ahb_div *= 2; + } else { + if (val & BIT(16)) + ahb_div = ast2600_a1_axi_ahb_div1_tbl[divbits]; + else + ahb_div = ast2600_a1_axi_ahb_div0_tbl[divbits]; + } + } else { ahb_div = ast2600_a0_axi_ahb_div_table[(val >> 11) & 0x3]; + } hw = clk_hw_register_fixed_factor(NULL, "ahb", "hpll", 0, 1, axi_div * ahb_div); aspeed_g6_clk_data->hws[ASPEED_CLK_AHB] = hw; -- 2.25.1