1 // SPDX-License-Identifier: GPL-2.0-only
3  * OMAP2xxx DVFS virtual clock functions
5  * Copyright (C) 2005-2008, 2012 Texas Instruments, Inc.
6  * Copyright (C) 2004-2010 Nokia Corporation
9  * Richard Woodruff <r-[email protected]>
30 #include <linux/cpufreq.h>
38 #include "cm-regbits-24xx.h"
48  * sys_ck_rate: the rate of the external high-frequency clock
49  * oscillator on the board.  Set by the SoC-specific clock init code.
55  * omap2_table_mpu_recalc - just return the MPU speed
63 	return curr_prcm_set->mpu_speed;  in omap2_table_mpu_recalc()
70  * Some might argue L3-DDR, others ARM, others IVA. This code is simple and
79 	highest_rate = -EINVAL;  in omap2_round_to_table_rate()
81 	for (ptr = rate_table; ptr->mpu_speed; ptr++) {  in omap2_round_to_table_rate()
82 		if (!(ptr->flags & cpu_mask))  in omap2_round_to_table_rate()
84 		if (ptr->xtal_speed != sys_ck_rate)  in omap2_round_to_table_rate()
87 		highest_rate = ptr->mpu_speed;  in omap2_round_to_table_rate()
90 		if (ptr->mpu_speed <= rate)  in omap2_round_to_table_rate()
105 	for (prcm = rate_table; prcm->mpu_speed; prcm++) {  in omap2_select_table_rate()
106 		if (!(prcm->flags & cpu_mask))  in omap2_select_table_rate()
109 		if (prcm->xtal_speed != sys_ck_rate)  in omap2_select_table_rate()
112 		if (prcm->mpu_speed <= rate) {  in omap2_select_table_rate()
113 			found_speed = prcm->mpu_speed;  in omap2_select_table_rate()
121 		return -EINVAL;  in omap2_select_table_rate()
127 	if (prcm->dpll_speed == cur_rate / 2) {  in omap2_select_table_rate()
129 	} else if (prcm->dpll_speed == cur_rate * 2) {  in omap2_select_table_rate()
131 	} else if (prcm->dpll_speed != cur_rate) {  in omap2_select_table_rate()
134 		if (prcm->dpll_speed == prcm->xtal_speed)  in omap2_select_table_rate()
137 		if ((prcm->cm_clksel2_pll & OMAP24XX_CORE_CLK_SRC_MASK) ==  in omap2_select_table_rate()
143 		omap2xxx_cm_set_mod_dividers(prcm->cm_clksel_mpu,  in omap2_select_table_rate()
144 					     prcm->cm_clksel_dsp,  in omap2_select_table_rate()
145 					     prcm->cm_clksel_gfx,  in omap2_select_table_rate()
146 					     prcm->cm_clksel1_core,  in omap2_select_table_rate()
147 					     prcm->cm_clksel_mdm);  in omap2_select_table_rate()
152 		omap2_set_prcm(prcm->cm_clksel1_pll, prcm->base_sdrc_rfr,  in omap2_select_table_rate()
165  * omap2xxx_clkt_vps_check_bootloader_rates - determine which of the rate
178 	for (prcm = rate_table; prcm->mpu_speed; prcm++) {  in omap2xxx_clkt_vps_check_bootloader_rates()
179 		if (!(prcm->flags & cpu_mask))  in omap2xxx_clkt_vps_check_bootloader_rates()
181 		if (prcm->xtal_speed != sys_ck_rate)  in omap2xxx_clkt_vps_check_bootloader_rates()
183 		if (prcm->dpll_speed <= rate)  in omap2xxx_clkt_vps_check_bootloader_rates()
190  * omap2xxx_clkt_vps_late_init - store a copy of the sys_ck rate
193  * code.  (The sys_ck rate does not -- or rather, must not -- change
212 #include <linux/clk-provider.h>
222  * omap2xxx_clkt_vps_init - initialize virt_prcm_set clock
224  * Does a manual init for the virtual prcm DVFS clock for OMAP2. This
225  * function is called only from omap2 DT clock init, as the virtual
246 	hw->hw.init = &init;  in omap2xxx_clkt_vps_init()
248 	clk = clk_register(NULL, &hw->hw);  in omap2xxx_clkt_vps_init()