/* SPDX-License-Identifier: GPL-2.0 */
/*
* Clock driver for TI Davinci PSC controllers
*
* Copyright ( C ) 2018 David Lechner < david @ lechnology . com >
*/
#ifndef __CLK_DAVINCI_PLL_H___
#define __CLK_DAVINCI_PLL_H___
#include <linux/bitops.h>
#include <linux/clk-provider.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/types.h>
#define PLL_HAS_CLKMODE BIT(0 ) /* PLL has PLLCTL[CLKMODE] */
#define PLL_HAS_PREDIV BIT(1 ) /* has prediv before PLL */
#define PLL_PREDIV_ALWAYS_ENABLED BIT(2 ) /* don't clear DEN bit */
#define PLL_PREDIV_FIXED_DIV BIT(3 ) /* fixed divider value */
#define PLL_HAS_POSTDIV BIT(4 ) /* has postdiv after PLL */
#define PLL_POSTDIV_ALWAYS_ENABLED BIT(5 ) /* don't clear DEN bit */
#define PLL_POSTDIV_FIXED_DIV BIT(6 ) /* fixed divider value */
#define PLL_HAS_EXTCLKSRC BIT(7 ) /* has selectable bypass */
#define PLL_PLLM_2X BIT(8 ) /* PLLM value is 2x (DM365) */
#define PLL_PREDIV_FIXED8 BIT(9 ) /* DM355 quirk */
/** davinci_pll_clk_info - controller-specific PLL info
* @ name : The name of the PLL
* @ unlock_reg : Option CFGCHIP register for unlocking PLL
* @ unlock_mask : Bitmask used with @ unlock_reg
* @ pllm_mask : Bitmask for PLLM [ PLLM ] value
* @ pllm_min : Minimum allowable value for PLLM [ PLLM ]
* @ pllm_max : Maximum allowable value for PLLM [ PLLM ]
* @ pllout_min_rate : Minimum allowable rate for PLLOUT
* @ pllout_max_rate : Maximum allowable rate for PLLOUT
* @ flags : Bitmap of PLL_ * flags .
*/
struct davinci_pll_clk_info {
const char *name;
u32 unlock_reg;
u32 unlock_mask;
u32 pllm_mask;
u32 pllm_min;
u32 pllm_max;
unsigned long pllout_min_rate;
unsigned long pllout_max_rate;
u32 flags;
};
#define SYSCLK_ARM_RATE BIT(0 ) /* Controls ARM rate */
#define SYSCLK_ALWAYS_ENABLED BIT(1 ) /* Or bad things happen */
#define SYSCLK_FIXED_DIV BIT(2 ) /* Fixed divider */
/** davinci_pll_sysclk_info - SYSCLKn-specific info
* @ name : The name of the clock
* @ parent_name : The name of the parent clock
* @ id : " n " in " SYSCLKn "
* @ ratio_width : Width ( in bits ) of RATIO in PLLDIVn register
* @ flags : Bitmap of SYSCLK_ * flags .
*/
struct davinci_pll_sysclk_info {
const char *name;
const char *parent_name;
u32 id;
u32 ratio_width;
u32 flags;
};
#define SYSCLK(i, n, p, w, f) \
static const struct davinci_pll_sysclk_info n = { \
.name = #n , \
.parent_name = #p , \
.id = (i), \
.ratio_width = (w), \
.flags = (f), \
}
/** davinci_pll_obsclk_info - OBSCLK-specific info
* @ name : The name of the clock
* @ parent_names : Array of names of the parent clocks
* @ num_parents : Length of @ parent_names
* @ table : Array of values to write to OCSEL [ OCSRC ] corresponding to
* @ parent_names
* @ ocsrc_mask : Bitmask for OCSEL [ OCSRC ]
*/
struct davinci_pll_obsclk_info {
const char *name;
const char * const *parent_names;
u8 num_parents;
u32 *table;
u32 ocsrc_mask;
};
struct clk *davinci_pll_clk_register(struct device *dev,
const struct davinci_pll_clk_info *info,
const char *parent_name,
void __iomem *base,
struct regmap *cfgchip);
struct clk *davinci_pll_auxclk_register(struct device *dev,
const char *name,
void __iomem *base);
struct clk *davinci_pll_sysclkbp_clk_register(struct device *dev,
const char *name,
void __iomem *base);
struct clk *
davinci_pll_obsclk_register(struct device *dev,
const struct davinci_pll_obsclk_info *info,
void __iomem *base);
struct clk *
davinci_pll_sysclk_register(struct device *dev,
const struct davinci_pll_sysclk_info *info,
void __iomem *base);
int of_davinci_pll_init(struct device *dev, struct device_node *node,
const struct davinci_pll_clk_info *info,
const struct davinci_pll_obsclk_info *obsclk_info,
const struct davinci_pll_sysclk_info **div_info,
u8 max_sysclk_id,
void __iomem *base,
struct regmap *cfgchip);
/* Platform-specific callbacks */
int da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
void of_da850_pll0_init(struct device_node *node);
int of_da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
#endif /* __CLK_DAVINCI_PLL_H___ */
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