LXR uboot/arch/arm/include/asm/arch-rockchip/clock.h

   1/*
   2 * (C) Copyright 2015 Google, Inc
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0
   5 */
   6
   7#ifndef _ASM_ARCH_CLOCK_H
   8#define _ASM_ARCH_CLOCK_H
   9
  10/* define pll mode */
  11#define RKCLK_PLL_MODE_SLOW             0
  12#define RKCLK_PLL_MODE_NORMAL           1
  13
  14enum {
  15        ROCKCHIP_SYSCON_NOC,
  16        ROCKCHIP_SYSCON_GRF,
  17        ROCKCHIP_SYSCON_SGRF,
  18        ROCKCHIP_SYSCON_PMU,
  19        ROCKCHIP_SYSCON_PMUGRF,
  20        ROCKCHIP_SYSCON_PMUSGRF,
  21        ROCKCHIP_SYSCON_CIC,
  22        ROCKCHIP_SYSCON_MSCH,
  23};
  24
  25/* Standard Rockchip clock numbers */
  26enum rk_clk_id {
  27        CLK_OSC,
  28        CLK_ARM,
  29        CLK_DDR,
  30        CLK_CODEC,
  31        CLK_GENERAL,
  32        CLK_NEW,
  33
  34        CLK_COUNT,
  35};
  36
  37static inline int rk_pll_id(enum rk_clk_id clk_id)
  38{
  39        return clk_id - 1;
  40}
  41
  42struct sysreset_reg {
  43        unsigned int glb_srst_fst_value;
  44        unsigned int glb_srst_snd_value;
  45};
  46
  47/**
  48 * clk_get_divisor() - Calculate the required clock divisior
  49 *
  50 * Given an input rate and a required output_rate, calculate the Rockchip
  51 * divisor needed to achieve this.
  52 *
  53 * @input_rate:         Input clock rate in Hz
  54 * @output_rate:        Output clock rate in Hz
  55 * @return divisor register value to use
  56 */
  57static inline u32 clk_get_divisor(ulong input_rate, uint output_rate)
  58{
  59        uint clk_div;
  60
  61        clk_div = input_rate / output_rate;
  62        clk_div = (clk_div + 1) & 0xfffe;
  63
  64        return clk_div;
  65}
  66
  67/**
  68 * rockchip_get_cru() - get a pointer to the clock/reset unit registers
  69 *
  70 * @return pointer to registers, or -ve error on error
  71 */
  72void *rockchip_get_cru(void);
  73
  74/**
  75 * rockchip_get_pmucru() - get a pointer to the clock/reset unit registers
  76 *
  77 * @return pointer to registers, or -ve error on error
  78 */
  79void *rockchip_get_pmucru(void);
  80
  81struct rk3288_cru;
  82struct rk3288_grf;
  83
  84void rk3288_clk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf);
  85
  86int rockchip_get_clk(struct udevice **devp);
  87
  88#endif
  89