1 // SPDX-License-Identifier: GPL-2.0-only
3  * PRCMU clock implementation for ux500 platform.
5  * Copyright (C) 2012 ST-Ericsson SA
9 #include <linux/clk-provider.h>
10 #include <linux/mfd/dbx500-prcmu.h>
26 /* PRCMU clock operations. */
33 	ret = prcmu_request_clock(clk->cg_sel, true);  in clk_prcmu_prepare()
35 		clk->is_prepared = 1;  in clk_prcmu_prepare()
43 	if (prcmu_request_clock(clk->cg_sel, false))  in clk_prcmu_unprepare()
47 		clk->is_prepared = 0;  in clk_prcmu_unprepare()
53 	return clk->is_prepared;  in clk_prcmu_is_prepared()
59 	clk->is_enabled = 1;  in clk_prcmu_enable()
66 	clk->is_enabled = 0;  in clk_prcmu_disable()
72 	return clk->is_enabled;  in clk_prcmu_is_enabled()
79 	return prcmu_clock_rate(clk->cg_sel);  in clk_prcmu_recalc_rate()
86 	return prcmu_round_clock_rate(clk->cg_sel, rate);  in clk_prcmu_round_rate()
93 	return prcmu_set_clock_rate(clk->cg_sel, rate);  in clk_prcmu_set_rate()
101 	if (!clk->opp_requested) {  in clk_prcmu_opp_prepare()
110 		clk->opp_requested = 1;  in clk_prcmu_opp_prepare()
113 	err = prcmu_request_clock(clk->cg_sel, true);  in clk_prcmu_opp_prepare()
117 		clk->opp_requested = 0;  in clk_prcmu_opp_prepare()
121 	clk->is_prepared = 1;  in clk_prcmu_opp_prepare()
129 	if (prcmu_request_clock(clk->cg_sel, false)) {  in clk_prcmu_opp_unprepare()
135 	if (clk->opp_requested) {  in clk_prcmu_opp_unprepare()
138 		clk->opp_requested = 0;  in clk_prcmu_opp_unprepare()
141 	clk->is_prepared = 0;  in clk_prcmu_opp_unprepare()
149 	if (!clk->opp_requested) {  in clk_prcmu_opp_volt_prepare()
156 		clk->opp_requested = 1;  in clk_prcmu_opp_volt_prepare()
159 	err = prcmu_request_clock(clk->cg_sel, true);  in clk_prcmu_opp_volt_prepare()
162 		clk->opp_requested = 0;  in clk_prcmu_opp_volt_prepare()
166 	clk->is_prepared = 1;  in clk_prcmu_opp_volt_prepare()
174 	if (prcmu_request_clock(clk->cg_sel, false)) {  in clk_prcmu_opp_volt_unprepare()
180 	if (clk->opp_requested) {  in clk_prcmu_opp_volt_unprepare()
182 		clk->opp_requested = 0;  in clk_prcmu_opp_volt_unprepare()
185 	clk->is_prepared = 0;  in clk_prcmu_opp_volt_unprepare()
257 		return ERR_PTR(-EINVAL);  in clk_reg_prcmu()
262 		return ERR_PTR(-ENOMEM);  in clk_reg_prcmu()
264 	clk->cg_sel = cg_sel;  in clk_reg_prcmu()
265 	clk->is_prepared = 1;  in clk_reg_prcmu()
266 	clk->is_enabled = 1;  in clk_reg_prcmu()
267 	clk->opp_requested = 0;  in clk_reg_prcmu()
277 	clk->hw.init = &clk_prcmu_init;  in clk_reg_prcmu()
279 	clk_reg = clk_register(NULL, &clk->hw);  in clk_reg_prcmu()
288 	return ERR_PTR(-ENOMEM);  in clk_reg_prcmu()