/* SPDX-License-Identifier: GPL-2.0-only */
/*
* linux/arch/arm/mach-omap1/clock.h
*
* Copyright (C) 2004 - 2005, 2009 Nokia corporation
* Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
* Based on clocks.h by Tony Lindgren, Gordon McNutt and RidgeRun, Inc
*/
#ifndef __ARCH_ARM_MACH_OMAP1_CLOCK_H
#define __ARCH_ARM_MACH_OMAP1_CLOCK_H
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
struct module;
struct omap1_clk;
struct omap_clk {
u16 cpu;
struct clk_lookup lk;
};
#define CLK(dev, con, ck, cp) \
{ \
.cpu = cp, \
.lk = { \
.dev_id = dev, \
.con_id = con, \
.clk_hw = ck, \
}, \
}
/* Platform flags for the clkdev-OMAP integration code */
#define CK_310 (1 << 0)
#define CK_7XX (1 << 1) /* 7xx, 850 */
#define CK_1510 (1 << 2)
#define CK_16XX (1 << 3) /* 16xx, 17xx, 5912 */
#define CK_1710 (1 << 4) /* 1710 extra for rate selection */
/**
* struct clkops - some clock function pointers
* @enable: fn ptr that enables the current clock in hardware
* @disable: fn ptr that enables the current clock in hardware
* @allow_idle: fn ptr that enables autoidle for the current clock in hardware
*/
struct clkops {
int (*enable)(struct omap1_clk *clk);
void (*disable)(struct omap1_clk *clk);
};
/*
* struct clk.flags possibilities
*
* XXX document the rest of the clock flags here
*/
#define ENABLE_REG_32BIT (1 << 0) /* Use 32-bit access */
#define CLOCK_IDLE_CONTROL (1 << 1)
#define CLOCK_NO_IDLE_PARENT (1 << 2)
/**
* struct omap1_clk - OMAP1 struct clk
* @hw: struct clk_hw for common clock framework integration
* @ops: struct clkops * for this clock
* @rate: current clock rate
* @enable_reg: register to write to enable the clock (see @enable_bit)
* @recalc: fn ptr that returns the clock's current rate
* @set_rate: fn ptr that can change the clock's current rate
* @round_rate: fn ptr that can round the clock's current rate
* @init: fn ptr to do clock-specific initialization
* @enable_bit: bitshift to write to enable/disable the clock (see @enable_reg)
* @fixed_div: when > 0, this clock's rate is its parent's rate / @fixed_div
* @flags: see "struct clk.flags possibilities" above
* @rate_offset: bitshift for rate selection bitfield (OMAP1 only)
*/
struct omap1_clk {
struct clk_hw hw;
const struct clkops *ops;
unsigned long rate;
void __iomem *enable_reg;
unsigned long (*recalc)(struct omap1_clk *clk, unsigned long rate);
int (*set_rate)(struct omap1_clk *clk, unsigned long rate,
unsigned long p_rate);
long (*round_rate)(struct omap1_clk *clk, unsigned long rate,
unsigned long *p_rate);
int (*init)(struct omap1_clk *clk);
u8 enable_bit;
u8 fixed_div;
u8 flags;
u8 rate_offset;
};
#define to_omap1_clk(_hw) container_of(_hw, struct omap1_clk, hw)
void propagate_rate(struct omap1_clk *clk);
unsigned long followparent_recalc(struct omap1_clk *clk, unsigned long p_rate);
unsigned long omap_fixed_divisor_recalc(struct omap1_clk *clk, unsigned long p_rate);
extern struct omap1_clk dummy_ck;
int omap1_clk_init(void);
void omap1_clk_late_init(void);
unsigned long omap1_ckctl_recalc(struct omap1_clk *clk, unsigned long p_rate);
long omap1_round_sossi_rate(struct omap1_clk *clk, unsigned long rate, unsigned long *p_rate);
int omap1_set_sossi_rate(struct omap1_clk *clk, unsigned long rate, unsigned long p_rate);
unsigned long omap1_sossi_recalc(struct omap1_clk *clk, unsigned long p_rate);
unsigned long omap1_ckctl_recalc_dsp_domain(struct omap1_clk *clk, unsigned long p_rate);
int omap1_clk_set_rate_dsp_domain(struct omap1_clk *clk, unsigned long rate,
unsigned long p_rate);
long omap1_round_uart_rate(struct omap1_clk *clk, unsigned long rate, unsigned long *p_rate);
int omap1_set_uart_rate(struct omap1_clk *clk, unsigned long rate, unsigned long p_rate);
unsigned long omap1_uart_recalc(struct omap1_clk *clk, unsigned long p_rate);
int omap1_set_ext_clk_rate(struct omap1_clk *clk, unsigned long rate, unsigned long p_rate);
long omap1_round_ext_clk_rate(struct omap1_clk *clk, unsigned long rate, unsigned long *p_rate);
int omap1_init_ext_clk(struct omap1_clk *clk);
int omap1_select_table_rate(struct omap1_clk *clk, unsigned long rate, unsigned long p_rate);
long omap1_round_to_table_rate(struct omap1_clk *clk, unsigned long rate, unsigned long *p_rate);
int omap1_clk_set_rate_ckctl_arm(struct omap1_clk *clk, unsigned long rate, unsigned long p_rate);
long omap1_clk_round_rate_ckctl_arm(struct omap1_clk *clk, unsigned long rate,
unsigned long *p_rate);
struct uart_clk {
struct omap1_clk clk;
unsigned long sysc_addr;
};
/* Provide a method for preventing idling some ARM IDLECT clocks */
struct arm_idlect1_clk {
struct omap1_clk clk;
unsigned long no_idle_count;
__u8 idlect_shift;
};
/* ARM_CKCTL bit shifts */
#define CKCTL_PERDIV_OFFSET 0
#define CKCTL_LCDDIV_OFFSET 2
#define CKCTL_ARMDIV_OFFSET 4
#define CKCTL_DSPDIV_OFFSET 6
#define CKCTL_TCDIV_OFFSET 8
#define CKCTL_DSPMMUDIV_OFFSET 10
/*#define ARM_TIMXO 12*/
#define EN_DSPCK 13
/*#define ARM_INTHCK_SEL 14*/ /* Divide-by-2 for mpu inth_ck */
/* DSP_CKCTL bit shifts */
#define CKCTL_DSPPERDIV_OFFSET 0
/* ARM_IDLECT2 bit shifts */
#define EN_WDTCK 0
#define EN_XORPCK 1
#define EN_PERCK 2
#define EN_LCDCK 3
#define EN_LBCK 4 /* Not on 1610/1710 */
/*#define EN_HSABCK 5*/
#define EN_APICK 6
#define EN_TIMCK 7
#define DMACK_REQ 8
#define EN_GPIOCK 9 /* Not on 1610/1710 */
/*#define EN_LBFREECK 10*/
#define EN_CKOUT_ARM 11
/* ARM_IDLECT3 bit shifts */
#define EN_OCPI_CK 0
#define EN_TC1_CK 2
#define EN_TC2_CK 4
/* DSP_IDLECT2 bit shifts (0,1,2 are same as for ARM_IDLECT2) */
#define EN_DSPTIMCK 5
/* Various register defines for clock controls scattered around OMAP chip */
#define SDW_MCLK_INV_BIT 2 /* In ULPD_CLKC_CTRL */
#define USB_MCLK_EN_BIT 4 /* In ULPD_CLKC_CTRL */
#define USB_HOST_HHC_UHOST_EN 9 /* In MOD_CONF_CTRL_0 */
#define SWD_ULPD_PLL_CLK_REQ 1 /* In SWD_CLK_DIV_CTRL_SEL */
#define COM_ULPD_PLL_CLK_REQ 1 /* In COM_CLK_DIV_CTRL_SEL */
#define SWD_CLK_DIV_CTRL_SEL 0xfffe0874
#define COM_CLK_DIV_CTRL_SEL 0xfffe0878
#define SOFT_REQ_REG 0xfffe0834
#define SOFT_REQ_REG2 0xfffe0880
extern __u32 arm_idlect1_mask;
extern struct omap1_clk *api_ck_p, *ck_dpll1_p, *ck_ref_p;
extern const struct clkops clkops_dspck;
extern const struct clkops clkops_uart_16xx;
extern const struct clkops clkops_generic;
/* used for passing SoC type to omap1_{select,round_to}_table_rate() */
extern u32 cpu_mask;
extern const struct clk_ops omap1_clk_null_ops;
extern const struct clk_ops omap1_clk_gate_ops;
extern const struct clk_ops omap1_clk_rate_ops;
extern const struct clk_ops omap1_clk_full_ops;
#endif