2 * (C) Copyright 2010 Samsung Electronics
3 * Minkyu Kang <mk7.kang@samsung.com>
5 * SPDX-License-Identifier: GPL-2.0+
8 #ifndef __ASM_ARM_ARCH_CLK_H_
9 #define __ASM_ARM_ARCH_CLK_H_
20 #define MASK_PRE_RATIO(x) (0xff << ((x << 4) + 8))
21 #define MASK_RATIO(x) (0xf << (x << 4))
22 #define SET_PRE_RATIO(x, y) ((y & 0xff) << ((x << 4) + 8))
23 #define SET_RATIO(x, y) ((y & 0xf) << (x << 4))
31 unsigned long get_pll_clk(int pllreg);
32 unsigned long get_arm_clk(void);
33 unsigned long get_i2c_clk(void);
34 unsigned long get_pwm_clk(void);
35 unsigned long get_uart_clk(int dev_index);
36 unsigned long get_mmc_clk(int dev_index);
37 void set_mmc_clk(int dev_index, unsigned int div);
38 unsigned long get_lcd_clk(void);
39 void set_lcd_clk(void);
40 void set_mipi_clk(void);
41 int set_i2s_clk_source(unsigned int i2s_id);
42 int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
44 int set_epll_clk(unsigned long rate);
45 int set_spi_clk(int periph_id, unsigned int rate);
48 * get the clk frequency of the required peripheral
50 * @param peripheral Peripheral id
52 * @return frequency of the peripheral clk
54 unsigned long clock_get_periph_rate(int peripheral);