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 C9BD0C6FA86 for ; Mon, 5 Sep 2022 07:54:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237030AbiIEHyS (ORCPT ); Mon, 5 Sep 2022 03:54:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236993AbiIEHyH (ORCPT ); Mon, 5 Sep 2022 03:54:07 -0400 X-Greylist: delayed 608 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 05 Sep 2022 00:54:05 PDT Received: from us-smtp-delivery-115.mimecast.com (us-smtp-delivery-115.mimecast.com [170.10.133.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0818944549 for ; Mon, 5 Sep 2022 00:54:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=maxlinear.com; s=selector; t=1662364381; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=cXsJkI9uheokmDJdr4Al6h7pqoH+3TWVaaDrZ0MDZeY=; b=b64WXEXL32FZt7IXnfMe6YgCo6URilexHHHUuFrvToC+selj++Ys4Pm4M+Vabfa/Bod2Yb yWAFxN3mXVsCUCiswyukABfjhawxp4yXii20wnPSFvpo0OScjWYUakDJgtR9OVbhjfBn4b 0cv25/5arudpn8DacLZbQIkAFaZCmKHw/iECM/a3Fq2TrLdhngFQP9rKOju6jrvgQs+jS3 lF+yQJOxSIPl2XXxe1bfqBrsJmg/BkeLmMlNEvaFwzxucthMmtXovuw3r7nHTsDMGgrDxx lecYWi4BjJPalUV2M08pI9w3CSoax6+TBKBumrnWwOebTriyGTHZu2Eogn13dg== Received: from mail.maxlinear.com (174-47-1-83.static.ctl.one [174.47.1.83]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id us-mta-86-t3i3N88IO3eHPMNn8pxtqw-1; Mon, 05 Sep 2022 03:43:54 -0400 X-MC-Unique: t3i3N88IO3eHPMNn8pxtqw-1 Received: from sgsxdev001.isng.phoenix.local (10.226.81.111) by mail.maxlinear.com (10.23.38.120) with Microsoft SMTP Server id 15.1.2375.24; Mon, 5 Sep 2022 00:43:51 -0700 From: Rahul Tanwar To: , , CC: , , "Rahul Tanwar" Subject: [PATCH v2 0/5] Modify MxL's CGU clk driver to make it secure boot compatible Date: Mon, 5 Sep 2022 15:43:43 +0800 Message-ID: X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: maxlinear.com Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org MxL's CGU driver was found to be lacking below required features. Add these required lacking features: 1. Since it is a core driver, it has to conform to secure boot & secure access architecture. In order for the register accesses to be secure access compliant, it needs regmap support as per our security architectu= re. Hence, replace direct read/writel with regmap based IO. Also remove spin= locks because they are no longer necessary because regmap uses its own lock. 2. There are some gate clocks which are used by the power mgmt IP to gate w= hen a certain power saving mode is activated. These gate clocks can also be= =20 gated from CGU clk driver. This creates a conflict. To avoid the conflic= t, by default disable gating such gate registers from CGU clk driver. But k= eep a flag to do so for other older IP's which uses same CGU clk IP but does= not use same power mgmt IP. 3. Fix two functional bugs found during testing. This patch series is based on below git tree: git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git Rahul Tanwar (5): clk: mxl: Switch from direct readl/writel based IO to regmap based IO clk: mxl: Remove unnecessary spinlocks clk: mxl: Avoid disabling gate clocks from clk driver clk: mxl: Add validation for register reads/writes clk: mxl: Add a missing flag to allow parent clock rate change drivers/clk/x86/Kconfig | 5 +- drivers/clk/x86/clk-cgu-pll.c | 23 ++----- drivers/clk/x86/clk-cgu.c | 117 +++++++++++----------------------- drivers/clk/x86/clk-cgu.h | 71 +++++++++++++-------- drivers/clk/x86/clk-lgm.c | 16 +++-- 5 files changed, 101 insertions(+), 131 deletions(-) --=20 2.17.1