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,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 D5AC8C433E2 for ; Thu, 18 Jun 2020 02:41:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B440121D6C for ; Thu, 18 Jun 2020 02:41:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592448101; bh=nZiTh/x0+BJwJJK5EHwTZcOVVxfwS36S2zGYTDgC4ZU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ci2Urn1siCpPa1mmzFa+9Cu4pxLB6VO3rg8KvliBcOuHh4WIarRaP7/cdw0TD+acR DIw2fjhkMNMc+YUUzbUHgsGX/w/IsMvxZeQvfJ8/m/8aEMj+dOrmCXKbswnGIh/btc /fd55j0NZuJDrYsYHj/KKQLGhPhmkAriYnvYhveU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728188AbgFRBMW (ORCPT ); Wed, 17 Jun 2020 21:12:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:39640 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728745AbgFRBLi (ORCPT ); Wed, 17 Jun 2020 21:11:38 -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 3CA2E21974; Thu, 18 Jun 2020 01:11:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592442698; bh=nZiTh/x0+BJwJJK5EHwTZcOVVxfwS36S2zGYTDgC4ZU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pkBgkTForBTTz7VuKwDRtFnFgF0uth22pPe8HWvv/eR2EzEDHNtctM1s6peFUozzm clqDAKZtJ5n6L9YsFkPmFdNHX38nE29A5PpwkvyXCBmzR80W3vy5xhDbUQIci1OCLc eQ3gC0GlSm2sLmtGXDorDHNbco7jNGy41ajTCpu0= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Martin Blumenstingl , Jerome Brunet , Sasha Levin , linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.7 161/388] clk: meson: meson8b: Don't rely on u-boot to init all GP_PLL registers Date: Wed, 17 Jun 2020 21:04:18 -0400 Message-Id: <20200618010805.600873-161-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-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Martin Blumenstingl [ Upstream commit a29ae8600d50ece1856b062a39ed296b8b952259 ] Not all u-boot versions initialize the HHI_GP_PLL_CNTL[2-5] registers. In that case all HHI_GPLL_PLL_CNTL[1-5] registers are 0x0 and when booting Linux the PLL fails to lock. The initialization sequence from u-boot is: - put the PLL into reset - write 0x59C88000 to HHI_GP_PLL_CNTL2 - write 0xCA463823 to HHI_GP_PLL_CNTL3 - write 0x0286A027 to HHI_GP_PLL_CNTL4 - write 0x00003000 to HHI_GP_PLL_CNTL5 - set M, N, OD and the enable bit - take the PLL out of reset - check if it has locked - disable the PLL In Linux we already initialize M, N, OD, the enable and the reset bits. Also the HHI_GP_PLL_CNTL[2-5] registers with these magic values (the exact meaning is unknown) so the PLL can lock when the vendor u-boot did not initialize these registers yet. Fixes: b882964b376f21 ("clk: meson: meson8b: add support for the GP_PLL clock on Meson8m2") Signed-off-by: Martin Blumenstingl Signed-off-by: Jerome Brunet Link: https://lore.kernel.org/r/20200501215717.735393-1-martin.blumenstingl@googlemail.com Signed-off-by: Sasha Levin --- drivers/clk/meson/meson8b.c | 9 +++++++++ drivers/clk/meson/meson8b.h | 4 ++++ 2 files changed, 13 insertions(+) diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c index 5f375799ce46..11f6b868cf2b 100644 --- a/drivers/clk/meson/meson8b.c +++ b/drivers/clk/meson/meson8b.c @@ -1918,6 +1918,13 @@ static struct clk_regmap meson8b_mali = { }, }; +static const struct reg_sequence meson8m2_gp_pll_init_regs[] = { + { .reg = HHI_GP_PLL_CNTL2, .def = 0x59c88000 }, + { .reg = HHI_GP_PLL_CNTL3, .def = 0xca463823 }, + { .reg = HHI_GP_PLL_CNTL4, .def = 0x0286a027 }, + { .reg = HHI_GP_PLL_CNTL5, .def = 0x00003000 }, +}; + static const struct pll_params_table meson8m2_gp_pll_params_table[] = { PLL_PARAMS(182, 3), { /* sentinel */ }, @@ -1951,6 +1958,8 @@ static struct clk_regmap meson8m2_gp_pll_dco = { .width = 1, }, .table = meson8m2_gp_pll_params_table, + .init_regs = meson8m2_gp_pll_init_regs, + .init_count = ARRAY_SIZE(meson8m2_gp_pll_init_regs), }, .hw.init = &(struct clk_init_data){ .name = "gp_pll_dco", diff --git a/drivers/clk/meson/meson8b.h b/drivers/clk/meson/meson8b.h index c889fbeec30f..c91fb07fcb65 100644 --- a/drivers/clk/meson/meson8b.h +++ b/drivers/clk/meson/meson8b.h @@ -20,6 +20,10 @@ * [0] http://dn.odroid.com/S805/Datasheet/S805_Datasheet%20V0.8%2020150126.pdf */ #define HHI_GP_PLL_CNTL 0x40 /* 0x10 offset in data sheet */ +#define HHI_GP_PLL_CNTL2 0x44 /* 0x11 offset in data sheet */ +#define HHI_GP_PLL_CNTL3 0x48 /* 0x12 offset in data sheet */ +#define HHI_GP_PLL_CNTL4 0x4C /* 0x13 offset in data sheet */ +#define HHI_GP_PLL_CNTL5 0x50 /* 0x14 offset in data sheet */ #define HHI_VIID_CLK_DIV 0x128 /* 0x4a offset in data sheet */ #define HHI_VIID_CLK_CNTL 0x12c /* 0x4b offset in data sheet */ #define HHI_GCLK_MPEG0 0x140 /* 0x50 offset in data sheet */ -- 2.25.1