// SPDX-License-Identifier: GPL-2.0 /* * Copyright (c) 2014-2020, NVIDIA CORPORATION. All rights reserved. */ #include <linux/kernel.h> #include <linux/io.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/of.h> #include <soc/tegra/mc.h> #include "tegra210-emc.h" #include "tegra210-mc.h" /* * Enable flags for specifying verbosity. */ #define INFO … #define STEPS … #define SUB_STEPS … #define PRELOCK … #define PRELOCK_STEPS … #define ACTIVE_EN … #define PRAMP_UP … #define PRAMP_DN … #define EMA_WRITES … #define EMA_UPDATES … #define PER_TRAIN … #define CC_PRINT … #define CCFIFO … #define REGS … #define REG_LISTS … #define emc_dbg(emc, flags, ...) … #define DVFS_CLOCK_CHANGE_VERSION … #define EMC_PRELOCK_VERSION … enum { … }; /* * PTFV defines - basically just indexes into the per table PTFV array. */ #define PTFV_DQSOSC_MOVAVG_C0D0U0_INDEX … #define PTFV_DQSOSC_MOVAVG_C0D0U1_INDEX … #define PTFV_DQSOSC_MOVAVG_C0D1U0_INDEX … #define PTFV_DQSOSC_MOVAVG_C0D1U1_INDEX … #define PTFV_DQSOSC_MOVAVG_C1D0U0_INDEX … #define PTFV_DQSOSC_MOVAVG_C1D0U1_INDEX … #define PTFV_DQSOSC_MOVAVG_C1D1U0_INDEX … #define PTFV_DQSOSC_MOVAVG_C1D1U1_INDEX … #define PTFV_DVFS_SAMPLES_INDEX … #define PTFV_MOVAVG_WEIGHT_INDEX … #define PTFV_CONFIG_CTRL_INDEX … #define PTFV_CONFIG_CTRL_USE_PREVIOUS_EMA … /* * Do arithmetic in fixed point. */ #define MOVAVG_PRECISION_FACTOR … /* * The division portion of the average operation. */ #define __AVERAGE_PTFV(dev) … /* * Convert val to fixed point and add it to the temporary average. */ #define __INCREMENT_PTFV(dev, val) … /* * Convert a moving average back to integral form and return the value. */ #define __MOVAVG_AC(timing, dev) … /* Weighted update. */ #define __WEIGHTED_UPDATE_PTFV(dev, nval) … /* Access a particular average. */ #define __MOVAVG(timing, dev) … static bool tegra210_emc_compare_update_delay(struct tegra210_emc_timing *timing, u32 measured, u32 idx) { … } static void tegra210_emc_get_clktree_delay(struct tegra210_emc *emc, u32 delay[DRAM_CLKTREE_NUM]) { … } static bool periodic_compensation_handler(struct tegra210_emc *emc, u32 type, struct tegra210_emc_timing *last, struct tegra210_emc_timing *next) { … } static u32 tegra210_emc_r21021_periodic_compensation(struct tegra210_emc *emc) { … } /* * Do the clock change sequence. */ static void tegra210_emc_r21021_set_clock(struct tegra210_emc *emc, u32 clksrc) { … } const struct tegra210_emc_sequence tegra210_emc_r21021 = …;
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