2 * (C) Copyright 2015 Google, Inc
4 * SPDX-License-Identifier: GPL-2.0
7 #ifndef _ASM_ARCH_CLOCK_H
8 #define _ASM_ARCH_CLOCK_H
11 #define RKCLK_PLL_MODE_SLOW 0
12 #define RKCLK_PLL_MODE_NORMAL 1
21 /* Standard Rockchip clock numbers */
33 static inline int rk_pll_id(enum rk_clk_id clk_id)
39 * clk_get_divisor() - Calculate the required clock divisior
41 * Given an input rate and a required output_rate, calculate the Rockchip
42 * divisor needed to achieve this.
44 * @input_rate: Input clock rate in Hz
45 * @output_rate: Output clock rate in Hz
46 * @return divisor register value to use
48 static inline u32 clk_get_divisor(ulong input_rate, uint output_rate)
52 clk_div = input_rate / output_rate;
53 clk_div = (clk_div + 1) & 0xfffe;
59 * rockchip_get_cru() - get a pointer to the clock/reset unit registers
61 * @return pointer to registers, or -ve error on error
63 void *rockchip_get_cru(void);
66 * rkclk_get_clk() - get a pointer to a given clock
68 * This is an internal function - use outside the clock subsystem indicates
69 * that work is needed!
71 * @clk_id: Clock requested
72 * @devp: Returns a pointer to that clock
73 * @return 0 if OK, -ve on error
75 int rkclk_get_clk(enum rk_clk_id clk_id, struct udevice **devp);
80 void rkclk_configure_cpu(struct rk3288_cru *cru, struct rk3288_grf *grf);