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 05F2AC072A2 for ; Wed, 15 Nov 2023 20:42:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233326AbjKOUmy (ORCPT ); Wed, 15 Nov 2023 15:42:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49602 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235044AbjKOTlC (ORCPT ); Wed, 15 Nov 2023 14:41:02 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC54A9E for ; Wed, 15 Nov 2023 11:40:58 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 510D2C433C8; Wed, 15 Nov 2023 19:40:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1700077258; bh=GceRFJfOI8n02VV7vUtBG3D7vVJ4c7hx2SMHLWhJ8xQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YyVsPJTffzZeMCCqisBDUv7bOAup28mHbg+yzEydDGb0Ajoavk1Lvel3BWk6FJ4As x0xct8NEBYY9NJYVRoc0VqC+utTgvySLnR8y8CWMF+gf7nR3CsqTsz4rbpN8Wn7+UJ /yXnKD39crKKs4vs6uKVwphPGOZaqQ/r0VBXexEQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dmitry Baryshkov , Kathiravan T , Varadarajan Narayanan , Bjorn Andersson , Sasha Levin Subject: [PATCH 6.6 193/603] clk: qcom: clk-alpha-pll: introduce stromer plus ops Date: Wed, 15 Nov 2023 14:12:18 -0500 Message-ID: <20231115191626.611382967@linuxfoundation.org> X-Mailer: git-send-email 2.42.1 In-Reply-To: <20231115191613.097702445@linuxfoundation.org> References: <20231115191613.097702445@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Varadarajan Narayanan [ Upstream commit 84da48921a97cee3dd1391659e93ee01d122b78b ] Stromer plus APSS PLL does not support dynamic frequency scaling. To switch between frequencies, we have to shut down the PLL, configure the L and ALPHA values and turn on again. So introduce the separate set of ops for Stromer Plus PLL. Reviewed-by: Dmitry Baryshkov Signed-off-by: Kathiravan T Signed-off-by: Varadarajan Narayanan Link: https://lore.kernel.org/r/2affa6c63ff0c4342230623a7d4eef02ec7c02d4.1697781921.git.quic_varada@quicinc.com Signed-off-by: Bjorn Andersson Stable-dep-of: 267e29198436 ("clk: qcom: apss-ipq-pll: Use stromer plus ops for stromer plus pll") Signed-off-by: Sasha Levin --- drivers/clk/qcom/clk-alpha-pll.c | 63 ++++++++++++++++++++++++++++++++ drivers/clk/qcom/clk-alpha-pll.h | 1 + 2 files changed, 64 insertions(+) diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index e4ef645f65d1f..892f2efc1c32c 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -2479,3 +2479,66 @@ const struct clk_ops clk_alpha_pll_stromer_ops = { .set_rate = clk_alpha_pll_stromer_set_rate, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_stromer_ops); + +static int clk_alpha_pll_stromer_plus_set_rate(struct clk_hw *hw, + unsigned long rate, + unsigned long prate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + u32 l, alpha_width = pll_alpha_width(pll); + int ret, pll_mode; + u64 a; + + rate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width); + + ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &pll_mode); + if (ret) + return ret; + + regmap_write(pll->clkr.regmap, PLL_MODE(pll), 0); + + /* Delay of 2 output clock ticks required until output is disabled */ + udelay(1); + + regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l); + + if (alpha_width > ALPHA_BITWIDTH) + a <<= alpha_width - ALPHA_BITWIDTH; + + regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a); + regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll), + a >> ALPHA_BITWIDTH); + + regmap_write(pll->clkr.regmap, PLL_MODE(pll), PLL_BYPASSNL); + + /* Wait five micro seconds or more */ + udelay(5); + regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_RESET_N, + PLL_RESET_N); + + /* The lock time should be less than 50 micro seconds worst case */ + usleep_range(50, 60); + + ret = wait_for_pll_enable_lock(pll); + if (ret) { + pr_err("Wait for PLL enable lock failed [%s] %d\n", + clk_hw_get_name(hw), ret); + return ret; + } + + if (pll_mode & PLL_OUTCTRL) + regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_OUTCTRL, + PLL_OUTCTRL); + + return 0; +} + +const struct clk_ops clk_alpha_pll_stromer_plus_ops = { + .prepare = clk_alpha_pll_enable, + .unprepare = clk_alpha_pll_disable, + .is_enabled = clk_alpha_pll_is_enabled, + .recalc_rate = clk_alpha_pll_recalc_rate, + .determine_rate = clk_alpha_pll_stromer_determine_rate, + .set_rate = clk_alpha_pll_stromer_plus_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_stromer_plus_ops); diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h index e4bd863027ab6..903fbab9b58e9 100644 --- a/drivers/clk/qcom/clk-alpha-pll.h +++ b/drivers/clk/qcom/clk-alpha-pll.h @@ -152,6 +152,7 @@ extern const struct clk_ops clk_alpha_pll_postdiv_ops; extern const struct clk_ops clk_alpha_pll_huayra_ops; extern const struct clk_ops clk_alpha_pll_postdiv_ro_ops; extern const struct clk_ops clk_alpha_pll_stromer_ops; +extern const struct clk_ops clk_alpha_pll_stromer_plus_ops; extern const struct clk_ops clk_alpha_pll_fabia_ops; extern const struct clk_ops clk_alpha_pll_fixed_fabia_ops; -- 2.42.0