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Thu, 29 Feb 2024 05:39:17 GMT Received: from hu-skakitap-hyd.qualcomm.com (10.80.80.8) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Wed, 28 Feb 2024 21:39:12 -0800 From: Satya Priya Kakitapalli Date: Thu, 29 Feb 2024 11:08:55 +0530 Subject: [PATCH 2/5] clk: qcom: clk-alpha-pll: Add support for Regera PLL ops Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <20240229-camcc-support-sm8150-v1-2-8c28c6c87990@quicinc.com> References: <20240229-camcc-support-sm8150-v1-0-8c28c6c87990@quicinc.com> In-Reply-To: <20240229-camcc-support-sm8150-v1-0-8c28c6c87990@quicinc.com> To: Bjorn Andersson , Konrad Dybcio , Michael Turquette , Stephen Boyd , Abhishek Sahu , "Rob Herring" , Krzysztof Kozlowski , Conor Dooley CC: Stephen Boyd , , , , , Ajit Pandey , "Imran Shaik" , Taniya Das , Jagadeesh Kona , Satya Priya Kakitapalli X-Mailer: b4 0.12.4 X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: z9KLFxA5kudLRM_q0rht2i_ZQaA4BnCV X-Proofpoint-ORIG-GUID: z9KLFxA5kudLRM_q0rht2i_ZQaA4BnCV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-28_08,2024-02-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxlogscore=999 suspectscore=0 priorityscore=1501 clxscore=1015 bulkscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2402120000 definitions=main-2402290042 From: Taniya Das Regera PLL ops are required to control the Regera PLL from clock controller drivers, thus add support for the same. Signed-off-by: Taniya Das Signed-off-by: Satya Priya Kakitapalli --- drivers/clk/qcom/clk-alpha-pll.c | 152 ++++++++++++++++++++++++++++++++++++++- drivers/clk/qcom/clk-alpha-pll.h | 5 ++ 2 files changed, 156 insertions(+), 1 deletion(-) diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index 8dc3b8774b8e..f0bf282212c9 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved. - * Copyright (c) 2021, 2023, Qualcomm Innovation Center, Inc. All rights reserved. + * Copyright (c) 2021, 2023-2024, Qualcomm Innovation Center, Inc. All rights reserved. */ #include @@ -2587,3 +2587,153 @@ const struct clk_ops clk_alpha_pll_stromer_plus_ops = { .set_rate = clk_alpha_pll_stromer_plus_set_rate, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_stromer_plus_ops); + +void clk_regera_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, + const struct alpha_pll_config *config) +{ + clk_alpha_pll_write_config(regmap, PLL_L_VAL(pll), config->l); + clk_alpha_pll_write_config(regmap, PLL_ALPHA_VAL(pll), config->alpha); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U(pll), config->config_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_CONFIG_CTL_U1(pll), config->config_ctl_hi1_val); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL(pll), config->user_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U(pll), config->user_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_USER_CTL_U1(pll), config->user_ctl_hi1_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL(pll), config->test_ctl_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U(pll), config->test_ctl_hi_val); + clk_alpha_pll_write_config(regmap, PLL_TEST_CTL_U1(pll), config->test_ctl_hi1_val); + + /* Set operation mode to STANDBY */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); +} +EXPORT_SYMBOL_GPL(clk_regera_pll_configure); + +static int clk_regera_pll_enable(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + int ret; + + regmap_read(regmap, PLL_MODE(pll), &val); + + /* If in FSM mode, just vote for it */ + if (val & PLL_VOTE_FSM_ENA) { + ret = clk_enable_regmap(hw); + if (ret) + return ret; + return wait_for_pll_enable_active(pll); + } + + /* Get the PLL out of bypass mode */ + regmap_update_bits(regmap, PLL_MODE(pll), PLL_BYPASSNL, PLL_BYPASSNL); + + /* + * H/W requires a 1us delay between disabling the bypass and + * de-asserting the reset. + */ + udelay(1); + + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); + + /* Set operation mode to RUN */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_RUN); + + ret = wait_for_pll_enable_lock(pll); + if (ret) + return ret; + + /* Enable the PLL outputs */ + regmap_update_bits(regmap, PLL_USER_CTL(pll), ZONDA_PLL_OUT_MASK, ZONDA_PLL_OUT_MASK); + + /* Enable the global PLL outputs */ + regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL); + + return 0; +} + +static void clk_regera_pll_disable(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + + regmap_read(regmap, PLL_MODE(pll), &val); + + /* If in FSM mode, just unvote it */ + if (val & PLL_VOTE_FSM_ENA) { + clk_disable_regmap(hw); + return; + } + + /* Disable the global PLL output */ + regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0); + + /* Disable the PLL outputs */ + regmap_update_bits(regmap, PLL_USER_CTL(pll), ZONDA_PLL_OUT_MASK, 0); + + /* Put the PLL in bypass and reset */ + regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N | PLL_BYPASSNL, 0); + + /* Place the PLL mode in STANDBY state */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); +} + +static void zonda_pll_adjust_l_val(unsigned long rate, unsigned long prate, + u32 *l) +{ + u64 remainder, quotient; + + quotient = rate; + remainder = do_div(quotient, prate); + *l = quotient; + + if ((remainder * 2) / prate) + *l = *l + 1; +} + +static int clk_regera_pll_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long prate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + unsigned long rrate; + u32 l, alpha_width = pll_alpha_width(pll); + u64 a; + int ret; + + rrate = alpha_pll_round_rate(rate, prate, &l, &a, alpha_width); + + ret = alpha_pll_check_rate_margin(hw, rrate, rate); + if (ret < 0) + return ret; + + if (a && (a & BIT(15))) + zonda_pll_adjust_l_val(rate, prate, &l); + + regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a); + regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l); + + /* Wait before polling for the frequency latch */ + udelay(5); + + if (clk_hw_is_enabled(hw)) { + ret = wait_for_pll_enable_lock(pll); + if (ret) + return ret; + } + + /* Wait for PLL output to stabilize */ + udelay(100); + + return 0; +} + +const struct clk_ops clk_alpha_pll_regera_ops = { + .enable = clk_regera_pll_enable, + .disable = clk_regera_pll_disable, + .is_enabled = clk_alpha_pll_is_enabled, + .recalc_rate = clk_trion_pll_recalc_rate, + .round_rate = clk_alpha_pll_round_rate, + .set_rate = clk_regera_pll_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_regera_ops); diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h index fb6d50263bb9..5bb0a07da53d 100644 --- a/drivers/clk/qcom/clk-alpha-pll.h +++ b/drivers/clk/qcom/clk-alpha-pll.h @@ -21,6 +21,7 @@ enum { CLK_ALPHA_PLL_TYPE_LUCID = CLK_ALPHA_PLL_TYPE_TRION, CLK_ALPHA_PLL_TYPE_AGERA, CLK_ALPHA_PLL_TYPE_ZONDA, + CLK_ALPHA_PLL_TYPE_REGERA = CLK_ALPHA_PLL_TYPE_ZONDA, CLK_ALPHA_PLL_TYPE_ZONDA_OLE, CLK_ALPHA_PLL_TYPE_LUCID_EVO, CLK_ALPHA_PLL_TYPE_LUCID_OLE, @@ -189,6 +190,8 @@ extern const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops; extern const struct clk_ops clk_alpha_pll_rivian_evo_ops; #define clk_alpha_pll_postdiv_rivian_evo_ops clk_alpha_pll_postdiv_fabia_ops +extern const struct clk_ops clk_alpha_pll_regera_ops; + void clk_alpha_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, const struct alpha_pll_config *config); void clk_fabia_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, @@ -210,5 +213,7 @@ void clk_rivian_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regm const struct alpha_pll_config *config); void clk_stromer_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, const struct alpha_pll_config *config); +void clk_regera_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, + const struct alpha_pll_config *config); #endif