drivers/clk/davinci/pll.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Clock driver for TI Davinci PSC controllers
   4  *
   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 info
  29  * @name: The name of the PLL
  30  * @unlock_reg: Option CFGCHIP register for unlocking PLL
  31  * @unlock_mask: Bitmask used with @unlock_reg
  32  * @pllm_mask: Bitmask for PLLM[PLLM] value
  33  * @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 PLLOUT
  36  * @pllout_max_rate: Maximum allowable rate for PLLOUT
  37  * @flags: Bitmap of PLL_* flags.
  38  */
  39 struct 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 info
  56  * @name: The name of the clock
  57  * @parent_name: The name of the parent clock
  58  * @id: "n" in "SYSCLKn"
  59  * @ratio_width: Width (in bits) of RATIO in PLLDIVn register
  60  * @flags: Bitmap of SYSCLK_* flags.
  61  */
  62 struct 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)                           \
  71 static 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 info
  80  * @name: The name of the clock
  81  * @parent_names: Array of names of the parent clocks
  82  * @num_parents: Length of @parent_names
  83  * @table: Array of values to write to OCSEL[OCSRC] cooresponding to
  84  *         @parent_names
  85  * @ocsrc_mask: Bitmask for OCSEL[OCSRC]
  86  */
  87 struct 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
  95 struct 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);
 100 struct clk *davinci_pll_auxclk_register(struct device *dev,
 101                                         const char *name,
 102                                         void __iomem *base);
 103 struct clk *davinci_pll_sysclkbp_clk_register(struct device *dev,
 104                                               const char *name,
 105                                               void __iomem *base);
 106 struct clk *
 107 davinci_pll_obsclk_register(struct device *dev,
 108                             const struct davinci_pll_obsclk_info *info,
 109                             void __iomem *base);
 110 struct clk *
 111 davinci_pll_sysclk_register(struct device *dev,
 112                             const struct davinci_pll_sysclk_info *info,
 113                             void __iomem *base);
 114
 115 int 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
 125 #ifdef CONFIG_ARCH_DAVINCI_DA850
 126 int da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
 127 void of_da850_pll0_init(struct device_node *node);
 128 int of_da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
 129 #endif
 130 #ifdef CONFIG_ARCH_DAVINCI_DM355
 131 int dm355_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
 132 #endif
 133 #ifdef CONFIG_ARCH_DAVINCI_DM644x
 134 int dm644x_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
 135 #endif
 136 #ifdef CONFIG_ARCH_DAVINCI_DM646x
 137 int dm646x_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
 138 #endif
 139
 140 #endif /* __CLK_DAVINCI_PLL_H___ */