1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
9  * Baikal-T1 CCU PLL clocks driver
12 #define pr_fmt(fmt) "bt1-ccu-pll: " fmt
17 #include <linux/clk-provider.h>
24 #include <dt-bindings/clock/bt1-ccu.h>
26 #include "ccu-pll.h"
56  * shouldn't be ever gated. SATA and PCIe PLLs are the parents of APB-bus and
57  * DDR controller AXI-bus clocks. If they are gated the system will be
59  * of the corresponding subsystems. So until we aren't ready to re-initialize
88 		pll = data->plls[idx];  in ccu_pll_find_desc()
89 		if (pll && pll->id == clk_id)  in ccu_pll_find_desc()
93 	return ERR_PTR(-EINVAL);  in ccu_pll_find_desc()
102 		return ERR_PTR(-ENOMEM);  in ccu_pll_create_data()
104 	data->np = np;  in ccu_pll_create_data()
116 	data->sys_regs = syscon_node_to_regmap(data->np->parent);  in ccu_pll_find_sys_regs()
117 	if (IS_ERR(data->sys_regs)) {  in ccu_pll_find_sys_regs()
119 			of_node_full_name(data->np));  in ccu_pll_find_sys_regs()
120 		return PTR_ERR(data->sys_regs);  in ccu_pll_find_sys_regs()
133 	clk_id = clkspec->args[0];  in ccu_pll_of_clk_hw_get()
151 		init.id = info->id;  in ccu_pll_clk_register()
152 		init.name = info->name;  in ccu_pll_clk_register()
153 		init.parent_name = info->parent_name;  in ccu_pll_clk_register()
154 		init.base = info->base;  in ccu_pll_clk_register()
155 		init.sys_regs = data->sys_regs;  in ccu_pll_clk_register()
156 		init.np = data->np;  in ccu_pll_clk_register()
157 		init.flags = info->flags;  in ccu_pll_clk_register()
159 		data->plls[idx] = ccu_pll_hw_register(&init);  in ccu_pll_clk_register()
160 		if (IS_ERR(data->plls[idx])) {  in ccu_pll_clk_register()
161 			ret = PTR_ERR(data->plls[idx]);  in ccu_pll_clk_register()
168 	ret = of_clk_add_hw_provider(data->np, ccu_pll_of_clk_hw_get, data);  in ccu_pll_clk_register()
171 			of_node_full_name(data->np));  in ccu_pll_clk_register()
178 	for (--idx; idx >= 0; --idx)  in ccu_pll_clk_register()
179 		ccu_pll_hw_unregister(data->plls[idx]);  in ccu_pll_clk_register()
206 CLK_OF_DECLARE(ccu_pll, "baikal,bt1-ccu-pll", ccu_pll_init);