From: Varadarajan Narayanan <quic_varada@xxxxxxxxxxx> Add programming sequence support for managing the Stromer PLLs. Co-developed-by: Sricharan R <quic_srichara@xxxxxxxxxxx> Signed-off-by: Sricharan R <quic_srichara@xxxxxxxxxxx> Signed-off-by: Varadarajan Narayanan <quic_varada@xxxxxxxxxxx> Signed-off-by: Kathiravan T <quic_kathirav@xxxxxxxxxxx> --- Changes since V4: - Introduced a separate function clk_stromer_pll_configure() instead of making changes in clk_alpha_pll_configure() - Stephen Boyd - Updated the copyright year to 2023 - Stephen Boyd - Minor changes - Stephen Boyd - Renamed the variables 'status_reg_val' and 'status_reg_mask' to 'status_val' and 'status_mask' respectively Changes since V3: - Updated the title with correct patch version Changes since V2: - splitted this patch from IPQ5018 series[1] - Rebased on linux-6.2-rc1 [1] https://lore.kernel.org/linux-arm-msm/20220621161126.15883-1-quic_srichara@xxxxxxxxxxx/ drivers/clk/qcom/clk-alpha-pll.c | 128 ++++++++++++++++++++++++++++++- drivers/clk/qcom/clk-alpha-pll.h | 13 +++- 2 files changed, 139 insertions(+), 2 deletions(-) diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index f9e4cfd7261c..d841ec414072 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, Qualcomm Innovation Center, Inc. All rights reserved. + * Copyright (c) 2021, 2023, Qualcomm Innovation Center, Inc. All rights reserved. */ #include <linux/kernel.h> @@ -204,6 +204,18 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = { [PLL_OFF_CONFIG_CTL] = 0x1C, [PLL_OFF_STATUS] = 0x20, }, + [CLK_ALPHA_PLL_TYPE_STROMER] = { + [PLL_OFF_L_VAL] = 0x08, + [PLL_OFF_ALPHA_VAL] = 0x10, + [PLL_OFF_ALPHA_VAL_U] = 0x14, + [PLL_OFF_USER_CTL] = 0x18, + [PLL_OFF_USER_CTL_U] = 0x1c, + [PLL_OFF_CONFIG_CTL] = 0x20, + [PLL_OFF_CONFIG_CTL_U] = 0xff, + [PLL_OFF_TEST_CTL] = 0x30, + [PLL_OFF_TEST_CTL_U] = 0x34, + [PLL_OFF_STATUS] = 0x28, + }, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); @@ -215,6 +227,8 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); #define ALPHA_BITWIDTH 32U #define ALPHA_SHIFT(w) min(w, ALPHA_BITWIDTH) +#define ALPHA_PLL_STATUS_REG_SHIFT 8 + #define PLL_HUAYRA_M_WIDTH 8 #define PLL_HUAYRA_M_SHIFT 8 #define PLL_HUAYRA_M_MASK 0xff @@ -2324,3 +2338,115 @@ const struct clk_ops clk_alpha_pll_rivian_evo_ops = { .round_rate = clk_rivian_evo_pll_round_rate, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_rivian_evo_ops); + +void clk_stromer_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, + const struct alpha_pll_config *config) +{ + u32 val, val_u, mask, mask_u; + + regmap_write(regmap, PLL_L_VAL(pll), config->l); + regmap_write(regmap, PLL_ALPHA_VAL(pll), config->alpha); + regmap_write(regmap, PLL_CONFIG_CTL(pll), config->config_ctl_val); + + if (pll_has_64bit_config(pll)) + regmap_write(regmap, PLL_CONFIG_CTL_U(pll), + config->config_ctl_hi_val); + + if (pll_alpha_width(pll) > 32) + regmap_write(regmap, PLL_ALPHA_VAL_U(pll), config->alpha_hi); + + val = config->main_output_mask; + val |= config->aux_output_mask; + val |= config->aux2_output_mask; + val |= config->early_output_mask; + val |= config->pre_div_val; + val |= config->post_div_val; + val |= config->vco_val; + val |= config->alpha_en_mask; + val |= config->alpha_mode_mask; + + mask = config->main_output_mask; + mask |= config->aux_output_mask; + mask |= config->aux2_output_mask; + mask |= config->early_output_mask; + mask |= config->pre_div_mask; + mask |= config->post_div_mask; + mask |= config->vco_mask; + mask |= config->alpha_en_mask; + mask |= config->alpha_mode_mask; + + regmap_update_bits(regmap, PLL_USER_CTL(pll), mask, val); + + /* Stromer APSS PLL does not enable LOCK_DET by default, so enable it */ + val_u = config->status_val << ALPHA_PLL_STATUS_REG_SHIFT; + val_u |= config->lock_det; + + mask_u = config->status_mask; + mask_u |= config->lock_det; + + regmap_update_bits(regmap, PLL_USER_CTL_U(pll), mask_u, val_u); + regmap_write(regmap, PLL_TEST_CTL(pll), config->test_ctl_val); + regmap_write(regmap, PLL_TEST_CTL_U(pll), config->test_ctl_hi_val); + + if (pll->flags & SUPPORTS_FSM_MODE) + qcom_pll_set_fsm_mode(regmap, PLL_MODE(pll), 6, 0); +} +EXPORT_SYMBOL_GPL(clk_stromer_pll_configure); + +static int clk_alpha_pll_stromer_determine_rate(struct clk_hw *hw, + struct clk_rate_request *req) +{ + u32 l; + u64 a; + + req->rate = alpha_pll_round_rate(req->rate, req->best_parent_rate, + &l, &a, ALPHA_REG_BITWIDTH); + + return 0; +} + +static int clk_alpha_pll_stromer_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long prate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + int ret; + u32 l; + u64 a; + + rate = alpha_pll_round_rate(rate, prate, &l, &a, ALPHA_REG_BITWIDTH); + + regmap_write(pll->clkr.regmap, PLL_L_VAL(pll), l); + regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL(pll), a); + regmap_write(pll->clkr.regmap, PLL_ALPHA_VAL_U(pll), + a >> ALPHA_BITWIDTH); + + regmap_update_bits(pll->clkr.regmap, PLL_USER_CTL(pll), + PLL_ALPHA_EN, PLL_ALPHA_EN); + + if (!clk_hw_is_enabled(hw)) + return 0; + + /* + * Stromer PLL supports Dynamic programming. + * It allows the PLL frequency to be changed on-the-fly without first + * execution of a shutdown procedure followed by a bring up procedure. + */ + regmap_update_bits(pll->clkr.regmap, PLL_MODE(pll), PLL_UPDATE, + PLL_UPDATE); + + ret = wait_for_pll_update(pll); + if (ret) + return ret; + + return wait_for_pll_enable_lock(pll); +} + +const struct clk_ops clk_alpha_pll_stromer_ops = { + .enable = clk_alpha_pll_enable, + .disable = 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_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_stromer_ops); diff --git a/drivers/clk/qcom/clk-alpha-pll.h b/drivers/clk/qcom/clk-alpha-pll.h index 2bdae362c827..33b8badb9fb0 100644 --- a/drivers/clk/qcom/clk-alpha-pll.h +++ b/drivers/clk/qcom/clk-alpha-pll.h @@ -1,5 +1,9 @@ /* SPDX-License-Identifier: GPL-2.0 */ -/* Copyright (c) 2015, 2018, The Linux Foundation. All rights reserved. */ +/* + * Copyright (c) 2015, 2018, 2021 The Linux Foundation. All rights reserved. + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + #ifndef __QCOM_CLK_ALPHA_PLL_H__ #define __QCOM_CLK_ALPHA_PLL_H__ @@ -22,6 +26,7 @@ enum { CLK_ALPHA_PLL_TYPE_RIVIAN_EVO, CLK_ALPHA_PLL_TYPE_DEFAULT_EVO, CLK_ALPHA_PLL_TYPE_BRAMMO_EVO, + CLK_ALPHA_PLL_TYPE_STROMER, CLK_ALPHA_PLL_TYPE_MAX, }; @@ -131,6 +136,9 @@ struct alpha_pll_config { u32 post_div_mask; u32 vco_val; u32 vco_mask; + u32 status_val; + u32 status_mask; + u32 lock_det; }; extern const struct clk_ops clk_alpha_pll_ops; @@ -139,6 +147,7 @@ extern const struct clk_ops clk_alpha_pll_hwfsm_ops; 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_fabia_ops; extern const struct clk_ops clk_alpha_pll_fixed_fabia_ops; @@ -187,5 +196,7 @@ void clk_lucid_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regma const struct alpha_pll_config *config); void clk_rivian_evo_pll_configure(struct clk_alpha_pll *pll, struct regmap *regmap, 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); #endif -- 2.17.1
