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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * Clock driver for TI Davinci PSC controllers4 *5 * Copyright (C) 2018 David Lechner <david@lechnology.com>6 */7 8#ifndef __CLK_DAVINCI_PLL_H___9#define __CLK_DAVINCI_PLL_H___10 11#include <linux/bitops.h>12#include <linux/clk-provider.h>13#include <linux/of.h>14#include <linux/regmap.h>15#include <linux/types.h>16 17#define PLL_HAS_CLKMODE			BIT(0) /* PLL has PLLCTL[CLKMODE] */18#define PLL_HAS_PREDIV			BIT(1) /* has prediv before PLL */19#define PLL_PREDIV_ALWAYS_ENABLED	BIT(2) /* don't clear DEN bit */20#define PLL_PREDIV_FIXED_DIV		BIT(3) /* fixed divider value */21#define PLL_HAS_POSTDIV			BIT(4) /* has postdiv after PLL */22#define PLL_POSTDIV_ALWAYS_ENABLED	BIT(5) /* don't clear DEN bit */23#define PLL_POSTDIV_FIXED_DIV		BIT(6) /* fixed divider value */24#define PLL_HAS_EXTCLKSRC		BIT(7) /* has selectable bypass */25#define PLL_PLLM_2X			BIT(8) /* PLLM value is 2x (DM365) */26#define PLL_PREDIV_FIXED8		BIT(9) /* DM355 quirk */27 28/** davinci_pll_clk_info - controller-specific PLL info29 * @name: The name of the PLL30 * @unlock_reg: Option CFGCHIP register for unlocking PLL31 * @unlock_mask: Bitmask used with @unlock_reg32 * @pllm_mask: Bitmask for PLLM[PLLM] value33 * @pllm_min: Minimum allowable value for PLLM[PLLM]34 * @pllm_max: Maximum allowable value for PLLM[PLLM]35 * @pllout_min_rate: Minimum allowable rate for PLLOUT36 * @pllout_max_rate: Maximum allowable rate for PLLOUT37 * @flags: Bitmap of PLL_* flags.38 */39struct davinci_pll_clk_info {40	const char *name;41	u32 unlock_reg;42	u32 unlock_mask;43	u32 pllm_mask;44	u32 pllm_min;45	u32 pllm_max;46	unsigned long pllout_min_rate;47	unsigned long pllout_max_rate;48	u32 flags;49};50 51#define SYSCLK_ARM_RATE		BIT(0) /* Controls ARM rate */52#define SYSCLK_ALWAYS_ENABLED	BIT(1) /* Or bad things happen */53#define SYSCLK_FIXED_DIV	BIT(2) /* Fixed divider */54 55/** davinci_pll_sysclk_info - SYSCLKn-specific info56 * @name: The name of the clock57 * @parent_name: The name of the parent clock58 * @id: "n" in "SYSCLKn"59 * @ratio_width: Width (in bits) of RATIO in PLLDIVn register60 * @flags: Bitmap of SYSCLK_* flags.61 */62struct davinci_pll_sysclk_info {63	const char *name;64	const char *parent_name;65	u32 id;66	u32 ratio_width;67	u32 flags;68};69 70#define SYSCLK(i, n, p, w, f)				\71static const struct davinci_pll_sysclk_info n = {	\72	.name		= #n,				\73	.parent_name	= #p,				\74	.id		= (i),				\75	.ratio_width	= (w),				\76	.flags		= (f),				\77}78 79/** davinci_pll_obsclk_info - OBSCLK-specific info80 * @name: The name of the clock81 * @parent_names: Array of names of the parent clocks82 * @num_parents: Length of @parent_names83 * @table: Array of values to write to OCSEL[OCSRC] cooresponding to84 *         @parent_names85 * @ocsrc_mask: Bitmask for OCSEL[OCSRC]86 */87struct davinci_pll_obsclk_info {88	const char *name;89	const char * const *parent_names;90	u8 num_parents;91	u32 *table;92	u32 ocsrc_mask;93};94 95struct clk *davinci_pll_clk_register(struct device *dev,96				     const struct davinci_pll_clk_info *info,97				     const char *parent_name,98				     void __iomem *base,99				     struct regmap *cfgchip);100struct clk *davinci_pll_auxclk_register(struct device *dev,101					const char *name,102					void __iomem *base);103struct clk *davinci_pll_sysclkbp_clk_register(struct device *dev,104					      const char *name,105					      void __iomem *base);106struct clk *107davinci_pll_obsclk_register(struct device *dev,108			    const struct davinci_pll_obsclk_info *info,109			    void __iomem *base);110struct clk *111davinci_pll_sysclk_register(struct device *dev,112			    const struct davinci_pll_sysclk_info *info,113			    void __iomem *base);114 115int of_davinci_pll_init(struct device *dev, struct device_node *node,116			const struct davinci_pll_clk_info *info,117			const struct davinci_pll_obsclk_info *obsclk_info,118			const struct davinci_pll_sysclk_info **div_info,119			u8 max_sysclk_id,120			void __iomem *base,121			struct regmap *cfgchip);122 123/* Platform-specific callbacks */124 125int da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);126void of_da850_pll0_init(struct device_node *node);127int of_da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);128 129#endif /* __CLK_DAVINCI_PLL_H___ */130