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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, 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 414CDC32771 for ; Mon, 20 Jan 2020 03:49:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 223AE2075B for ; Mon, 20 Jan 2020 03:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729152AbgATDtt (ORCPT ); Sun, 19 Jan 2020 22:49:49 -0500 Received: from mail-sz.amlogic.com ([211.162.65.117]:13027 "EHLO mail-sz.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729015AbgATDtt (ORCPT ); Sun, 19 Jan 2020 22:49:49 -0500 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; Mon, 20 Jan 2020 11:50:11 +0800 From: Jian Hu To: Jerome Brunet , Neil Armstrong CC: Jian Hu , Martin Blumenstingl , Kevin Hilman , Rob Herring , Michael Turquette , Stephen Boyd , Qiufang Dai , Jianxin Pan , Victor Wan , Chandle Zou , , , , , Subject: [PATCH v7 2/5] clk: meson: add support for A1 PLL clock ops Date: Mon, 20 Jan 2020 11:49:34 +0800 Message-ID: <20200120034937.128600-3-jian.hu@amlogic.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200120034937.128600-1-jian.hu@amlogic.com> References: <20200120034937.128600-1-jian.hu@amlogic.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.28.8.25] Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Compared with the previous SoCs, self-adaption current module is newly added for A1, and there is no reset parm except the fixed pll. In A1 PLL, the PLL enable sequence is different, using the new power-on sequence to enable the PLL. Signed-off-by: Jian Hu Acked-by: Martin Blumenstingl --- drivers/clk/meson/clk-pll.c | 47 +++++++++++++++++++++++++++++++------ drivers/clk/meson/clk-pll.h | 2 ++ 2 files changed, 42 insertions(+), 7 deletions(-) diff --git a/drivers/clk/meson/clk-pll.c b/drivers/clk/meson/clk-pll.c index ddb1e5634739..10926291440f 100644 --- a/drivers/clk/meson/clk-pll.c +++ b/drivers/clk/meson/clk-pll.c @@ -283,10 +283,14 @@ static void meson_clk_pll_init(struct clk_hw *hw) struct meson_clk_pll_data *pll = meson_clk_pll_data(clk); if (pll->init_count) { - meson_parm_write(clk->map, &pll->rst, 1); + if (MESON_PARM_APPLICABLE(&pll->rst)) + meson_parm_write(clk->map, &pll->rst, 1); + regmap_multi_reg_write(clk->map, pll->init_regs, pll->init_count); - meson_parm_write(clk->map, &pll->rst, 0); + + if (MESON_PARM_APPLICABLE(&pll->rst)) + meson_parm_write(clk->map, &pll->rst, 0); } } @@ -295,8 +299,11 @@ static int meson_clk_pll_is_enabled(struct clk_hw *hw) struct clk_regmap *clk = to_clk_regmap(hw); struct meson_clk_pll_data *pll = meson_clk_pll_data(clk); - if (meson_parm_read(clk->map, &pll->rst) || - !meson_parm_read(clk->map, &pll->en) || + if (MESON_PARM_APPLICABLE(&pll->rst) && + meson_parm_read(clk->map, &pll->rst)) + return 0; + + if (!meson_parm_read(clk->map, &pll->en) || !meson_parm_read(clk->map, &pll->l)) return 0; @@ -323,13 +330,34 @@ static int meson_clk_pll_enable(struct clk_hw *hw) return 0; /* Make sure the pll is in reset */ - meson_parm_write(clk->map, &pll->rst, 1); + if (MESON_PARM_APPLICABLE(&pll->rst)) + meson_parm_write(clk->map, &pll->rst, 1); /* Enable the pll */ meson_parm_write(clk->map, &pll->en, 1); /* Take the pll out reset */ - meson_parm_write(clk->map, &pll->rst, 0); + 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)) { + udelay(10); + meson_parm_write(clk->map, &pll->current_en, 1); + udelay(40); + }; + + 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; @@ -343,10 +371,15 @@ static void meson_clk_pll_disable(struct clk_hw *hw) struct meson_clk_pll_data *pll = meson_clk_pll_data(clk); /* Put the pll is in reset */ - meson_parm_write(clk->map, &pll->rst, 1); + if (MESON_PARM_APPLICABLE(&pll->rst)) + meson_parm_write(clk->map, &pll->rst, 1); /* 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; -- 2.24.0