1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * (C) Copyright 2010 Samsung Electronics
4 * Minkyu Kang <mk7.kang@samsung.com>
7 #ifndef __ASM_ARM_ARCH_CLK_H_
8 #define __ASM_ARM_ARCH_CLK_H_
22 #define MASK_PRE_RATIO(x) (0xff << ((x << 4) + 8))
23 #define MASK_RATIO(x) (0xf << (x << 4))
24 #define SET_PRE_RATIO(x, y) ((y & 0xff) << ((x << 4) + 8))
25 #define SET_RATIO(x, y) ((y & 0xf) << (x << 4))
31 EXYNOS542X_SRC_MPLL = 3,
33 EXYNOS542X_SRC_EPLL = 6,
37 unsigned long get_pll_clk(int pllreg);
38 unsigned long get_arm_clk(void);
39 unsigned long get_i2c_clk(void);
40 unsigned long get_pwm_clk(void);
41 unsigned long get_uart_clk(int dev_index);
42 unsigned long get_mmc_clk(int dev_index);
43 void set_mmc_clk(int dev_index, unsigned int div);
44 unsigned long get_lcd_clk(void);
45 void set_lcd_clk(void);
46 void set_mipi_clk(void);
47 int set_i2s_clk_source(unsigned int i2s_id);
48 int set_i2s_clk_prescaler(unsigned int src_frq, unsigned int dst_frq,
50 int set_epll_clk(unsigned long rate);
51 int set_spi_clk(int periph_id, unsigned int rate);
54 * get the clk frequency of the required peripheral
56 * @param peripheral Peripheral id
58 * @return frequency of the peripheral clk
60 unsigned long clock_get_periph_rate(int peripheral);