diff options
Diffstat (limited to 'drivers/clk/qcom/clk-alpha-pll.c')
| -rw-r--r-- | drivers/clk/qcom/clk-alpha-pll.c | 166 |
1 files changed, 160 insertions, 6 deletions
diff --git a/drivers/clk/qcom/clk-alpha-pll.c b/drivers/clk/qcom/clk-alpha-pll.c index eaedcceb766f..521a23f13a08 100644 --- a/drivers/clk/qcom/clk-alpha-pll.c +++ b/drivers/clk/qcom/clk-alpha-pll.c @@ -1,6 +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. */ #include <linux/kernel.h> @@ -139,6 +140,20 @@ const u8 clk_alpha_pll_regs[][PLL_OFF_MAX_REGS] = { [PLL_OFF_OPMODE] = 0x28, [PLL_OFF_STATUS] = 0x38, }, + [CLK_ALPHA_PLL_TYPE_LUCID_EVO] = { + [PLL_OFF_OPMODE] = 0x04, + [PLL_OFF_STATUS] = 0x0c, + [PLL_OFF_L_VAL] = 0x10, + [PLL_OFF_ALPHA_VAL] = 0x14, + [PLL_OFF_USER_CTL] = 0x18, + [PLL_OFF_USER_CTL_U] = 0x1c, + [PLL_OFF_CONFIG_CTL] = 0x20, + [PLL_OFF_CONFIG_CTL_U] = 0x24, + [PLL_OFF_CONFIG_CTL_U1] = 0x28, + [PLL_OFF_TEST_CTL] = 0x2c, + [PLL_OFF_TEST_CTL_U] = 0x30, + [PLL_OFF_TEST_CTL_U1] = 0x34, + }, }; EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); @@ -175,6 +190,10 @@ EXPORT_SYMBOL_GPL(clk_alpha_pll_regs); #define LUCID_5LPE_PLL_LATCH_INPUT BIT(14) #define LUCID_5LPE_ENABLE_VOTE_RUN BIT(21) +/* LUCID EVO PLL specific settings and offsets */ +#define LUCID_EVO_ENABLE_VOTE_RUN BIT(25) +#define LUCID_EVO_PLL_L_VAL_MASK GENMASK(15, 0) + /* ZONDA PLL specific */ #define ZONDA_PLL_OUT_MASK 0xf #define ZONDA_STAY_IN_CFA BIT(16) @@ -204,7 +223,7 @@ static int wait_for_pll(struct clk_alpha_pll *pll, u32 mask, bool inverse, if (ret) return ret; - for (count = 100; count > 0; count--) { + for (count = 200; count > 0; count--) { ret = regmap_read(pll->clkr.regmap, PLL_MODE(pll), &val); if (ret) return ret; @@ -1741,24 +1760,32 @@ static int alpha_pll_lucid_5lpe_set_rate(struct clk_hw *hw, unsigned long rate, LUCID_5LPE_ALPHA_PLL_ACK_LATCH); } -static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, - unsigned long parent_rate) +static int __clk_lucid_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate, + unsigned long enable_vote_run) { struct clk_alpha_pll_postdiv *pll = to_clk_alpha_pll_postdiv(hw); - int i, val = 0, div, ret; + struct regmap *regmap = pll->clkr.regmap; + int i, val, div, ret; u32 mask; /* * If the PLL is in FSM mode, then treat set_rate callback as a * no-operation. */ - ret = regmap_read(pll->clkr.regmap, PLL_USER_CTL(pll), &val); + ret = regmap_read(regmap, PLL_USER_CTL(pll), &val); if (ret) return ret; - if (val & LUCID_5LPE_ENABLE_VOTE_RUN) + if (val & enable_vote_run) return 0; + if (!pll->post_div_table) { + pr_err("Missing the post_div_table for the %s PLL\n", + clk_hw_get_name(&pll->clkr.hw)); + return -EINVAL; + } + div = DIV_ROUND_UP_ULL((u64)parent_rate, rate); for (i = 0; i < pll->num_post_div; i++) { if (pll->post_div_table[i].div == div) { @@ -1772,6 +1799,12 @@ static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long mask, val << pll->post_div_shift); } +static int clk_lucid_5lpe_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + return __clk_lucid_pll_postdiv_set_rate(hw, rate, parent_rate, LUCID_5LPE_ENABLE_VOTE_RUN); +} + const struct clk_ops clk_alpha_pll_lucid_5lpe_ops = { .prepare = alpha_pll_lucid_5lpe_prepare, .enable = alpha_pll_lucid_5lpe_enable, @@ -1951,3 +1984,124 @@ const struct clk_ops clk_alpha_pll_zonda_ops = { .set_rate = clk_zonda_pll_set_rate, }; EXPORT_SYMBOL(clk_alpha_pll_zonda_ops); + +static int alpha_pll_lucid_evo_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; + + ret = regmap_read(regmap, PLL_USER_CTL(pll), &val); + if (ret) + return ret; + + /* If in FSM mode, just vote for it */ + if (val & LUCID_EVO_ENABLE_VOTE_RUN) { + ret = clk_enable_regmap(hw); + if (ret) + return ret; + return wait_for_pll_enable_lock(pll); + } + + /* Check if PLL is already enabled */ + ret = trion_pll_is_enabled(pll, regmap); + if (ret < 0) { + return ret; + } else if (ret) { + pr_warn("%s PLL is already enabled\n", clk_hw_get_name(&pll->clkr.hw)); + return 0; + } + + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_RESET_N, PLL_RESET_N); + if (ret) + return ret; + + /* 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 */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), PLL_OUT_MASK, PLL_OUT_MASK); + if (ret) + return ret; + + /* Enable the global PLL outputs */ + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, PLL_OUTCTRL); + if (ret) + return ret; + + /* Ensure that the write above goes through before returning. */ + mb(); + return ret; +} + +static void alpha_pll_lucid_evo_disable(struct clk_hw *hw) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 val; + int ret; + + ret = regmap_read(regmap, PLL_USER_CTL(pll), &val); + if (ret) + return; + + /* If in FSM mode, just unvote it */ + if (val & LUCID_EVO_ENABLE_VOTE_RUN) { + clk_disable_regmap(hw); + return; + } + + /* Disable the global PLL output */ + ret = regmap_update_bits(regmap, PLL_MODE(pll), PLL_OUTCTRL, 0); + if (ret) + return; + + /* Disable the PLL outputs */ + ret = regmap_update_bits(regmap, PLL_USER_CTL(pll), PLL_OUT_MASK, 0); + if (ret) + return; + + /* Place the PLL mode in STANDBY */ + regmap_write(regmap, PLL_OPMODE(pll), PLL_STANDBY); +} + +static unsigned long alpha_pll_lucid_evo_recalc_rate(struct clk_hw *hw, + unsigned long parent_rate) +{ + struct clk_alpha_pll *pll = to_clk_alpha_pll(hw); + struct regmap *regmap = pll->clkr.regmap; + u32 l, frac; + + regmap_read(regmap, PLL_L_VAL(pll), &l); + l &= LUCID_EVO_PLL_L_VAL_MASK; + regmap_read(regmap, PLL_ALPHA_VAL(pll), &frac); + + return alpha_pll_calc_rate(parent_rate, l, frac, pll_alpha_width(pll)); +} + +static int clk_lucid_evo_pll_postdiv_set_rate(struct clk_hw *hw, unsigned long rate, + unsigned long parent_rate) +{ + return __clk_lucid_pll_postdiv_set_rate(hw, rate, parent_rate, LUCID_EVO_ENABLE_VOTE_RUN); +} + +const struct clk_ops clk_alpha_pll_fixed_lucid_evo_ops = { + .enable = alpha_pll_lucid_evo_enable, + .disable = alpha_pll_lucid_evo_disable, + .is_enabled = clk_trion_pll_is_enabled, + .recalc_rate = alpha_pll_lucid_evo_recalc_rate, + .round_rate = clk_alpha_pll_round_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_fixed_lucid_evo_ops); + +const struct clk_ops clk_alpha_pll_postdiv_lucid_evo_ops = { + .recalc_rate = clk_alpha_pll_postdiv_fabia_recalc_rate, + .round_rate = clk_alpha_pll_postdiv_fabia_round_rate, + .set_rate = clk_lucid_evo_pll_postdiv_set_rate, +}; +EXPORT_SYMBOL_GPL(clk_alpha_pll_postdiv_lucid_evo_ops); |