From patchwork Tue May 23 13:53:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Rokosov X-Patchwork-Id: 13252335 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 38DD1C7EE26 for ; Tue, 23 May 2023 13:54:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NqA5QfvWbLm7GX7ocdMFtVXwXOAulaqIjavDS4Tm1FA=; b=BCQ+WiszuAt1NO c9T7J0CDtLDri9xWNP/ISiX1viYdgH9ybWY/i/kewWLlya4ycYmx3P3EjgOVRpTG0MyMiezByVmx1 Hd85w2Al/UMe/z7LoLJgSRZKDjc3RUj2dF4em6Eny6wWDeZlTXu7wIQRlrxxp6eaGIUHDheJcfU// 3rwOTBXApufBj5TlvUD3kHF3HDy+BBr9nmfmYhTZHy3UgXu0oc42NcSSR7Is4Soim9dmeM7g2662G ONbnjhhutpJMSoRXVgH8TCBv7zL/0Mrq9AmrSI1T40aRYeDx6FCVRU84R0jwlGtCEXcEnznc4Qvnh LX9oL6x5z2qlVBxjeCog==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q1SSr-00AQGe-0Q; Tue, 23 May 2023 13:54:13 +0000 Received: from mx.sberdevices.ru ([45.89.227.171]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q1SSm-00AQCp-0V; Tue, 23 May 2023 13:54:10 +0000 Received: from s-lin-edge02.sberdevices.ru (localhost [127.0.0.1]) by mx.sberdevices.ru (Postfix) with ESMTP id 2CD4F5FD68; Tue, 23 May 2023 16:54:03 +0300 (MSK) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sberdevices.ru; s=mail; t=1684850043; bh=QACcL2z5H0WiVPZBqWtG1qVoEZA/+FwC6rxiZKbXGhQ=; h=From:To:Subject:Date:Message-ID:MIME-Version:Content-Type; b=d7cjZgy6FmwELYdiPA/MahxZUvDN4IL/6S6Sq6CN7KFg1OqB1O7fjfOezdXdi/og9 dqr4k9yNlx1UAJSQgBx4F7+DjoxAgRQl0CTzYMrm6EuPFA+gAHXWHNylRoQ5ufjT3v vRxtb5+1KzzIXcbyGJkNLyYTNfX6dFkt1z9cxyVTdQrQ7ph0i/qX3I107yONEBFTy3 FYb/lU59ijivs/2T5Q9f9A0kDvgmRDwmyO0G3cCg9B9CynqCRdfadaaoRHEUBLL4+/ OhTaOkTNuJMZD+9gZpGPb2EIBKb4zwKsNVWpMYgSwjSkOMpS4v5BnNDLlMkihOSCmM a9OWH9aXhvRCA== Received: from S-MS-EXCH01.sberdevices.ru (S-MS-EXCH01.sberdevices.ru [172.16.1.4]) by mx.sberdevices.ru (Postfix) with ESMTP; Tue, 23 May 2023 16:54:03 +0300 (MSK) From: Dmitry Rokosov To: , , , , , , , CC: , , , , , , , , Dmitry Rokosov Subject: [PATCH v16 2/6] clk: meson: introduce new pll power-on sequence for A1 SoC family Date: Tue, 23 May 2023 16:53:47 +0300 Message-ID: <20230523135351.19133-3-ddrokosov@sberdevices.ru> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20230523135351.19133-1-ddrokosov@sberdevices.ru> References: <20230523135351.19133-1-ddrokosov@sberdevices.ru> MIME-Version: 1.0 X-Originating-IP: [172.16.1.6] X-ClientProxiedBy: S-MS-EXCH02.sberdevices.ru (172.16.1.5) To S-MS-EXCH01.sberdevices.ru (172.16.1.4) X-KSMG-Rule-ID: 4 X-KSMG-Message-Action: clean X-KSMG-AntiSpam-Status: not scanned, disabled by settings X-KSMG-AntiSpam-Interceptor-Info: not scanned X-KSMG-AntiPhishing: not scanned, disabled by settings X-KSMG-AntiVirus: Kaspersky Secure Mail Gateway, version 1.1.2.30, bases: 2023/05/23 12:15:00 #21372692 X-KSMG-AntiVirus-Status: Clean, skipped X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230523_065408_900859_327FFA47 X-CRM114-Status: GOOD ( 14.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Modern meson PLL IPs are a little bit different from early known PLLs. The main difference is located in the init/enable/disable sequences; the rate logic is the same. In A1 PLL, the PLL enable sequence is different, so add new optional pll reg bits and use the new power-on sequence to enable the PLL: 1. enable the pll, delay for 10us 2. enable the pll self-adaption current module, delay for 40us 3. enable the lock detect module Signed-off-by: Jian Hu Acked-by: Martin Blumenstingl Signed-off-by: Dmitry Rokosov --- drivers/clk/meson/clk-pll.c | 23 +++++++++++++++++++++++ drivers/clk/meson/clk-pll.h | 2 ++ 2 files changed, 25 insertions(+) diff --git a/drivers/clk/meson/clk-pll.c b/drivers/clk/meson/clk-pll.c index 314ca945a4d0..56ec2210f1ad 100644 --- a/drivers/clk/meson/clk-pll.c +++ b/drivers/clk/meson/clk-pll.c @@ -358,6 +358,25 @@ static int meson_clk_pll_enable(struct clk_hw *hw) if (MESON_PARM_APPLICABLE(&pll->rst)) meson_parm_write(clk->map, &pll->rst, 0); + /* + * Compared with the previous SoCs, self-adaption current module + * is newly added for A1, keep the new power-on sequence to enable the + * PLL. The sequence is: + * 1. enable the pll, delay for 10us + * 2. enable the pll self-adaption current module, delay for 40us + * 3. enable the lock detect module + */ + if (MESON_PARM_APPLICABLE(&pll->current_en)) { + usleep_range(10, 20); + meson_parm_write(clk->map, &pll->current_en, 1); + usleep_range(40, 50); + }; + + if (MESON_PARM_APPLICABLE(&pll->l_detect)) { + meson_parm_write(clk->map, &pll->l_detect, 1); + meson_parm_write(clk->map, &pll->l_detect, 0); + } + if (meson_clk_pll_wait_lock(hw)) return -EIO; @@ -375,6 +394,10 @@ 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 current module */ + 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..a2228c0fdce5 100644 --- a/drivers/clk/meson/clk-pll.h +++ b/drivers/clk/meson/clk-pll.h @@ -36,6 +36,8 @@ struct meson_clk_pll_data { struct parm frac; struct parm l; struct parm rst; + struct parm current_en; + struct parm l_detect; const struct reg_sequence *init_regs; unsigned int init_count; const struct pll_params_table *table;