From patchwork Fri Dec 6 07:40:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jian Hu X-Patchwork-Id: 11275693 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6C90613B6 for ; Fri, 6 Dec 2019 07:41:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 475482467A for ; Fri, 6 Dec 2019 07:41:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="EcGcZfAZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 475482467A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=amlogic.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=6SiV0ikVuUgy434w7ir3f/1jgQkfrw1rP7iOc2VwyOU=; b=EcGcZfAZAdHj/s R0OgJjk2F256/6xTXmg8+Cn3s/2i0Q91U3KtASNdlZXZbg4jQXkLe4XpyQdPAV/+2T1ydjDy7NiGI P2ebdxCTRKhc6gw5MuAFDLN5Qe0OswXyJcxTGMQ0jiwMRz6mrRgP0nHdYhlJC1vBpZ3YZyplJYU/v cZHdu0BnW0MxhD5tCGh5sqQ4gcPuDVnQ9SGk0dlCsRpUKvgDPAfmlPcVPVpaQrE2+7y4GzNMWSpIy 8s+hp20o05Iflv1iwk7YEo+wgCpWdOo4fumL8nFkRMCf0+Np4amzvaVWvK7l20ZVq61VF3uDoixIe cFr6av0hTOzjTd7VahcA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1id8FB-00028Q-74; Fri, 06 Dec 2019 07:41:41 +0000 Received: from mail-sz.amlogic.com ([211.162.65.117]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1id8En-0001eX-IQ; Fri, 06 Dec 2019 07:41:19 +0000 Received: from droid15-sz.amlogic.com (10.28.8.25) by mail-sz.amlogic.com (10.28.11.5) with Microsoft SMTP Server id 15.1.1591.10; Fri, 6 Dec 2019 15:41:36 +0800 From: Jian Hu To: Jerome Brunet , Neil Armstrong Subject: [PATCH v4 2/6] clk: meson: add support for A1 PLL clock ops Date: Fri, 6 Dec 2019 15:40:48 +0800 Message-ID: <20191206074052.15557-3-jian.hu@amlogic.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191206074052.15557-1-jian.hu@amlogic.com> References: <20191206074052.15557-1-jian.hu@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.28.8.25] X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191205_234117_629572_9329110B X-CRM114-Status: GOOD ( 10.48 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Herring , Victor Wan , Jianxin Pan , devicetree@vger.kernel.org, Martin Blumenstingl , Kevin Hilman , Michael Turquette , linux-kernel@vger.kernel.org, Stephen Boyd , Jian Hu , linux-arm-kernel@lists.infradead.org, Qiufang Dai , linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, Chandle Zou Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The A1 PLL design is different with previous SoCs. The PLL internal analog modules Power-on sequence is different with previous, and thus requires a strict register sequence to enable the PLL. Signed-off-by: Jian Hu --- drivers/clk/meson/clk-pll.c | 21 +++++++++++++++++++++ drivers/clk/meson/clk-pll.h | 1 + drivers/clk/meson/parm.h | 1 + 3 files changed, 23 insertions(+) diff --git a/drivers/clk/meson/clk-pll.c b/drivers/clk/meson/clk-pll.c index ddb1e5634739..4aff31a51589 100644 --- a/drivers/clk/meson/clk-pll.c +++ b/drivers/clk/meson/clk-pll.c @@ -318,6 +318,23 @@ static int meson_clk_pll_enable(struct clk_hw *hw) struct clk_regmap *clk = to_clk_regmap(hw); struct meson_clk_pll_data *pll = meson_clk_pll_data(clk); + /* + * The A1 design is different with previous SoCs.The PLL + * internal analog modules Power-on sequence is different with + * previous, and thus requires a strict register sequence to + * enable the PLL. + */ + if (MESON_PARM_APPLICABLE(&pll->current_en)) { + /* Enable the pll */ + meson_parm_write(clk->map, &pll->en, 1); + udelay(10); + /* Enable the pll self-adaption module current */ + meson_parm_write(clk->map, &pll->current_en, 1); + udelay(40); + meson_parm_write(clk->map, &pll->rst, 1); + meson_parm_write(clk->map, &pll->rst, 0); + } + /* do nothing if the PLL is already enabled */ if (clk_hw_is_enabled(hw)) return 0; @@ -347,6 +364,10 @@ static void meson_clk_pll_disable(struct clk_hw *hw) /* Disable the pll */ meson_parm_write(clk->map, &pll->en, 0); + + /* Disable PLL internal self-adaption module current */ + if (MESON_PARM_APPLICABLE(&pll->current_en)) + meson_parm_write(clk->map, &pll->current_en, 0); } static int meson_clk_pll_set_rate(struct clk_hw *hw, unsigned long rate, diff --git a/drivers/clk/meson/clk-pll.h b/drivers/clk/meson/clk-pll.h index 367efd0f6410..30f039242a65 100644 --- a/drivers/clk/meson/clk-pll.h +++ b/drivers/clk/meson/clk-pll.h @@ -36,6 +36,7 @@ struct meson_clk_pll_data { struct parm frac; struct parm l; struct parm rst; + struct parm current_en; const struct reg_sequence *init_regs; unsigned int init_count; const struct pll_params_table *table; diff --git a/drivers/clk/meson/parm.h b/drivers/clk/meson/parm.h index 3c9ef1b505ce..c53fb26577e3 100644 --- a/drivers/clk/meson/parm.h +++ b/drivers/clk/meson/parm.h @@ -20,6 +20,7 @@ (((reg) & CLRPMASK(width, shift)) | ((val) << (shift))) #define MESON_PARM_APPLICABLE(p) (!!((p)->width)) +#define MESON_PARM_CURRENT(p) (!!((p)->width)) struct parm { u16 reg_off;