drivers/clk/baikal-t1/ccu-pll.h

   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
  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__ */