1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * Copyright (C) 2017 Chen-Yu Tsai <wens@csie.org>
6 #include <linux/clk-provider.h>
15 	if (!(common->features & CCU_FEATURE_SIGMA_DELTA_MOD))  in ccu_sdm_helper_is_enabled()
18 	if (sdm->enable && !(readl(common->base + common->reg) & sdm->enable))  in ccu_sdm_helper_is_enabled()
21 	return !!(readl(common->base + sdm->tuning_reg) & sdm->tuning_enable);  in ccu_sdm_helper_is_enabled()
32 	if (!(common->features & CCU_FEATURE_SIGMA_DELTA_MOD))  in ccu_sdm_helper_enable()
36 	for (i = 0; i < sdm->table_size; i++)  in ccu_sdm_helper_enable()
37 		if (sdm->table[i].rate == rate)  in ccu_sdm_helper_enable()
38 			writel(sdm->table[i].pattern,  in ccu_sdm_helper_enable()
39 			       common->base + sdm->tuning_reg);  in ccu_sdm_helper_enable()
42 	spin_lock_irqsave(common->lock, flags);  in ccu_sdm_helper_enable()
43 	reg = readl(common->base + sdm->tuning_reg);  in ccu_sdm_helper_enable()
44 	writel(reg | sdm->tuning_enable, common->base + sdm->tuning_reg);  in ccu_sdm_helper_enable()
45 	spin_unlock_irqrestore(common->lock, flags);  in ccu_sdm_helper_enable()
47 	spin_lock_irqsave(common->lock, flags);  in ccu_sdm_helper_enable()
48 	reg = readl(common->base + common->reg);  in ccu_sdm_helper_enable()
49 	writel(reg | sdm->enable, common->base + common->reg);  in ccu_sdm_helper_enable()
50 	spin_unlock_irqrestore(common->lock, flags);  in ccu_sdm_helper_enable()
59 	if (!(common->features & CCU_FEATURE_SIGMA_DELTA_MOD))  in ccu_sdm_helper_disable()
62 	spin_lock_irqsave(common->lock, flags);  in ccu_sdm_helper_disable()
63 	reg = readl(common->base + common->reg);  in ccu_sdm_helper_disable()
64 	writel(reg & ~sdm->enable, common->base + common->reg);  in ccu_sdm_helper_disable()
65 	spin_unlock_irqrestore(common->lock, flags);  in ccu_sdm_helper_disable()
67 	spin_lock_irqsave(common->lock, flags);  in ccu_sdm_helper_disable()
68 	reg = readl(common->base + sdm->tuning_reg);  in ccu_sdm_helper_disable()
69 	writel(reg & ~sdm->tuning_enable, common->base + sdm->tuning_reg);  in ccu_sdm_helper_disable()
70 	spin_unlock_irqrestore(common->lock, flags);  in ccu_sdm_helper_disable()
74  * Sigma delta modulation provides a way to do fractional-N frequency
96 	if (!(common->features & CCU_FEATURE_SIGMA_DELTA_MOD))  in ccu_sdm_helper_has_rate()
99 	for (i = 0; i < sdm->table_size; i++)  in ccu_sdm_helper_has_rate()
100 		if (sdm->table[i].rate == rate)  in ccu_sdm_helper_has_rate()
113 	pr_debug("%s: Read sigma-delta modulation setting\n",  in ccu_sdm_helper_read_rate()
114 		 clk_hw_get_name(&common->hw));  in ccu_sdm_helper_read_rate()
116 	if (!(common->features & CCU_FEATURE_SIGMA_DELTA_MOD))  in ccu_sdm_helper_read_rate()
119 	pr_debug("%s: clock is sigma-delta modulated\n",  in ccu_sdm_helper_read_rate()
120 		 clk_hw_get_name(&common->hw));  in ccu_sdm_helper_read_rate()
122 	reg = readl(common->base + sdm->tuning_reg);  in ccu_sdm_helper_read_rate()
125 		 clk_hw_get_name(&common->hw), reg);  in ccu_sdm_helper_read_rate()
127 	for (i = 0; i < sdm->table_size; i++)  in ccu_sdm_helper_read_rate()
128 		if (sdm->table[i].pattern == reg &&  in ccu_sdm_helper_read_rate()
129 		    sdm->table[i].m == m && sdm->table[i].n == n)  in ccu_sdm_helper_read_rate()
130 			return sdm->table[i].rate;  in ccu_sdm_helper_read_rate()
143 	if (!(common->features & CCU_FEATURE_SIGMA_DELTA_MOD))  in ccu_sdm_helper_get_factors()
144 		return -EINVAL;  in ccu_sdm_helper_get_factors()
146 	for (i = 0; i < sdm->table_size; i++)  in ccu_sdm_helper_get_factors()
147 		if (sdm->table[i].rate == rate) {  in ccu_sdm_helper_get_factors()
148 			*m = sdm->table[i].m;  in ccu_sdm_helper_get_factors()
149 			*n = sdm->table[i].n;  in ccu_sdm_helper_get_factors()
154 	return -EINVAL;  in ccu_sdm_helper_get_factors()