arch/arm/mach-omap2/cm.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * OMAP2+ Clock Management prototypes
   4  *
   5  * Copyright (C) 2007-2009, 2012 Texas Instruments, Inc.
   6  * Copyright (C) 2007-2009 Nokia Corporation
   7  *
   8  * Written by Paul Walmsley
   9  */
  10 #ifndef __ARCH_ASM_MACH_OMAP2_CM_H
  11 #define __ARCH_ASM_MACH_OMAP2_CM_H
  12
  13 /*
  14  * MAX_MODULE_READY_TIME: max duration in microseconds to wait for the
  15  * PRCM to request that a module exit the inactive state in the case of
  16  * OMAP2 & 3.
  17  * In the case of OMAP4 this is the max duration in microseconds for the
  18  * module to reach the functionnal state from an inactive state.
  19  */
  20 #define MAX_MODULE_READY_TIME           2000
  21
  22 # ifndef __ASSEMBLER__
  23 #include <linux/clk/ti.h>
  24
  25 #include "prcm-common.h"
  26
  27 extern struct omap_domain_base cm_base;
  28 extern struct omap_domain_base cm2_base;
  29 extern void omap2_set_globals_cm(void __iomem *cm, void __iomem *cm2);
  30 # endif
  31
  32 /*
  33  * MAX_MODULE_DISABLE_TIME: max duration in microseconds to wait for
  34  * the PRCM to request that a module enter the inactive state in the
  35  * case of OMAP2 & 3.  In the case of OMAP4 this is the max duration
  36  * in microseconds for the module to reach the inactive state from
  37  * a functional state.
  38  * XXX FSUSB on OMAP4430 takes ~4ms to idle after reset during
  39  * kernel init.
  40  */
  41 #define MAX_MODULE_DISABLE_TIME         5000
  42
  43 # ifndef __ASSEMBLER__
  44
  45 /**
  46  * struct cm_ll_data - fn ptrs to per-SoC CM function implementations
  47  * @split_idlest_reg: ptr to the SoC CM-specific split_idlest_reg impl
  48  * @wait_module_ready: ptr to the SoC CM-specific wait_module_ready impl
  49  * @wait_module_idle: ptr to the SoC CM-specific wait_module_idle impl
  50  * @module_enable: ptr to the SoC CM-specific module_enable impl
  51  * @module_disable: ptr to the SoC CM-specific module_disable impl
  52  * @xlate_clkctrl: ptr to the SoC CM-specific clkctrl xlate addr impl
  53  */
  54 struct cm_ll_data {
  55         int (*split_idlest_reg)(struct clk_omap_reg *idlest_reg, s16 *prcm_inst,
  56                                 u8 *idlest_reg_id);
  57         int (*wait_module_ready)(u8 part, s16 prcm_mod, u16 idlest_reg,
  58                                  u8 idlest_shift);
  59         int (*wait_module_idle)(u8 part, s16 prcm_mod, u16 idlest_reg,
  60                                 u8 idlest_shift);
  61         void (*module_enable)(u8 mode, u8 part, u16 inst, u16 clkctrl_offs);
  62         void (*module_disable)(u8 part, u16 inst, u16 clkctrl_offs);
  63         u32 (*xlate_clkctrl)(u8 part, u16 inst, u16 clkctrl_offs);
  64 };
  65
  66 extern int cm_split_idlest_reg(struct clk_omap_reg *idlest_reg, s16 *prcm_inst,
  67                                u8 *idlest_reg_id);
  68 int omap_cm_wait_module_ready(u8 part, s16 prcm_mod, u16 idlest_reg,
  69                               u8 idlest_shift);
  70 int omap_cm_wait_module_idle(u8 part, s16 prcm_mod, u16 idlest_reg,
  71                              u8 idlest_shift);
  72 int omap_cm_module_enable(u8 mode, u8 part, u16 inst, u16 clkctrl_offs);
  73 int omap_cm_module_disable(u8 part, u16 inst, u16 clkctrl_offs);
  74 u32 omap_cm_xlate_clkctrl(u8 part, u16 inst, u16 clkctrl_offs);
  75 extern int cm_register(const struct cm_ll_data *cld);
  76 extern int cm_unregister(const struct cm_ll_data *cld);
  77 int omap_cm_init(void);
  78 int omap2_cm_base_init(void);
  79
  80 # endif
  81
  82 #endif