1 // SPDX-License-Identifier: GPL-2.0-only
9  * Baikal-T1 CCU PLL clocks driver
12 #define pr_fmt(fmt) "bt1-ccu-pll: " fmt
18 #include <linux/clk-provider.h>
25 #include <dt-bindings/clock/bt1-ccu.h>
27 #include "ccu-pll.h"
59  * shouldn't be ever gated. SATA and PCIe PLLs are the parents of APB-bus and
60  * DDR controller AXI-bus clocks. If they are gated the system will be
62  * of the corresponding subsystems. So until we aren't ready to re-initialize
93 			return data->plls[idx];  in ccu_pll_find_desc()
96 	return ERR_PTR(-EINVAL);  in ccu_pll_find_desc()
105 		return ERR_PTR(-ENOMEM);  in ccu_pll_create_data()
107 	data->np = np;  in ccu_pll_create_data()
119 	data->sys_regs = syscon_node_to_regmap(data->np->parent);  in ccu_pll_find_sys_regs()
120 	if (IS_ERR(data->sys_regs)) {  in ccu_pll_find_sys_regs()
122 			of_node_full_name(data->np));  in ccu_pll_find_sys_regs()
123 		return PTR_ERR(data->sys_regs);  in ccu_pll_find_sys_regs()
133 	struct ccu_pll *pll;  in ccu_pll_of_clk_hw_get()  local
136 	clk_id = clkspec->args[0];  in ccu_pll_of_clk_hw_get()
137 	pll = ccu_pll_find_desc(data, clk_id);  in ccu_pll_of_clk_hw_get()
138 	if (IS_ERR(pll)) {  in ccu_pll_of_clk_hw_get()
139 		if (pll != ERR_PTR(-EPROBE_DEFER))  in ccu_pll_of_clk_hw_get()
140 			pr_info("Invalid PLL clock ID %d specified\n", clk_id);  in ccu_pll_of_clk_hw_get()
142 		return ERR_CAST(pll);  in ccu_pll_of_clk_hw_get()
145 	return ccu_pll_get_clk_hw(pll);  in ccu_pll_of_clk_hw_get()
156 		/* Defer non-basic PLLs allocation for the probe stage */  in ccu_pll_clk_register()
157 		if (!!(info->features & CCU_PLL_BASIC) ^ defer) {  in ccu_pll_clk_register()
158 			if (!data->plls[idx])  in ccu_pll_clk_register()
159 				data->plls[idx] = ERR_PTR(-EPROBE_DEFER);  in ccu_pll_clk_register()
164 		init.id = info->id;  in ccu_pll_clk_register()
165 		init.name = info->name;  in ccu_pll_clk_register()
166 		init.parent_name = info->parent_name;  in ccu_pll_clk_register()
167 		init.base = info->base;  in ccu_pll_clk_register()
168 		init.sys_regs = data->sys_regs;  in ccu_pll_clk_register()
169 		init.np = data->np;  in ccu_pll_clk_register()
170 		init.flags = info->flags;  in ccu_pll_clk_register()
171 		init.features = info->features;  in ccu_pll_clk_register()
173 		data->plls[idx] = ccu_pll_hw_register(&init);  in ccu_pll_clk_register()
174 		if (IS_ERR(data->plls[idx])) {  in ccu_pll_clk_register()
175 			ret = PTR_ERR(data->plls[idx]);  in ccu_pll_clk_register()
176 			pr_err("Couldn't register PLL hw '%s'\n",  in ccu_pll_clk_register()
185 	for (--idx; idx >= 0; --idx) {  in ccu_pll_clk_register()
189 		ccu_pll_hw_unregister(data->plls[idx]);  in ccu_pll_clk_register()
204 		ccu_pll_hw_unregister(data->plls[idx]);  in ccu_pll_clk_unregister()
212 	ret = of_clk_add_hw_provider(data->np, ccu_pll_of_clk_hw_get, data);  in ccu_pll_of_register()
214 		pr_err("Couldn't register PLL provider of '%s'\n",  in ccu_pll_of_register()
215 			of_node_full_name(data->np));  in ccu_pll_of_register()
226 		return -EINVAL;  in ccu_pll_probe()
232 	{ .compatible = "baikal,bt1-ccu-pll" },
239 		.name = "clk-ccu-pll",
277 CLK_OF_DECLARE_DRIVER(ccu_pll, "baikal,bt1-ccu-pll", ccu_pll_init);