1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Copyright (C) 2020 BAIKAL ELECTRONICS, JSC
4  *
5  * Baikal-T1 CCU PLL interface driver
6  */
7 #ifndef __CLK_BT1_CCU_PLL_H__
8 #define __CLK_BT1_CCU_PLL_H__
9 
10 #include <linux/clk-provider.h>
11 #include <linux/spinlock.h>
12 #include <linux/regmap.h>
13 #include <linux/bits.h>
14 #include <linux/of.h>
15 
16 /*
17  * struct ccu_pll_init_data - CCU PLL initialization data
18  * @id: Clock private identifier.
19  * @name: Clocks name.
20  * @parent_name: Clocks parent name in a fw node.
21  * @base: PLL registers base address with respect to the sys_regs base.
22  * @sys_regs: Baikal-T1 System Controller registers map.
23  * @np: Pointer to the node describing the CCU PLLs.
24  * @flags: PLL clock flags.
25  */
26 struct ccu_pll_init_data {
27 	unsigned int id;
28 	const char *name;
29 	const char *parent_name;
30 	unsigned int base;
31 	struct regmap *sys_regs;
32 	struct device_node *np;
33 	unsigned long flags;
34 };
35 
36 /*
37  * struct ccu_pll - CCU PLL descriptor
38  * @hw: clk_hw of the PLL.
39  * @id: Clock private identifier.
40  * @reg_ctl: PLL control register base.
41  * @reg_ctl1: PLL control1 register base.
42  * @sys_regs: Baikal-T1 System Controller registers map.
43  * @lock: PLL state change spin-lock.
44  */
45 struct ccu_pll {
46 	struct clk_hw hw;
47 	unsigned int id;
48 	unsigned int reg_ctl;
49 	unsigned int reg_ctl1;
50 	struct regmap *sys_regs;
51 	spinlock_t lock;
52 };
53 #define to_ccu_pll(_hw) container_of(_hw, struct ccu_pll, hw)
54 
ccu_pll_get_clk_hw(struct ccu_pll * pll)55 static inline struct clk_hw *ccu_pll_get_clk_hw(struct ccu_pll *pll)
56 {
57 	return pll ? &pll->hw : NULL;
58 }
59 
60 struct ccu_pll *ccu_pll_hw_register(const struct ccu_pll_init_data *init);
61 
62 void ccu_pll_hw_unregister(struct ccu_pll *pll);
63 
64 #endif /* __CLK_BT1_CCU_PLL_H__ */
65