1 /*
2  * (C) Copyright 2007
3  * Stelian Pop <stelian@popies.net>
4  * Lead Tech Design <www.leadtechdesign.com>
5  * Copyright (C) 2009 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
6  *
7  * SPDX-License-Identifier:	GPL-2.0+
8  */
9 #ifndef __ASM_ARM_ARCH_CLK_H__
10 #define __ASM_ARM_ARCH_CLK_H__
11 
12 #include <asm/arch/hardware.h>
13 #include <asm/arch/at91_pmc.h>
14 #include <asm/global_data.h>
15 
16 static inline unsigned long get_cpu_clk_rate(void)
17 {
18 	DECLARE_GLOBAL_DATA_PTR;
19 	return gd->arch.cpu_clk_rate_hz;
20 }
21 
22 static inline unsigned long get_main_clk_rate(void)
23 {
24 	DECLARE_GLOBAL_DATA_PTR;
25 	return gd->arch.main_clk_rate_hz;
26 }
27 
28 static inline unsigned long get_mck_clk_rate(void)
29 {
30 	DECLARE_GLOBAL_DATA_PTR;
31 	return gd->arch.mck_rate_hz;
32 }
33 
34 static inline unsigned long get_plla_clk_rate(void)
35 {
36 	DECLARE_GLOBAL_DATA_PTR;
37 	return gd->arch.plla_rate_hz;
38 }
39 
40 static inline unsigned long get_pllb_clk_rate(void)
41 {
42 	DECLARE_GLOBAL_DATA_PTR;
43 	return gd->arch.pllb_rate_hz;
44 }
45 
46 static inline u32 get_pllb_init(void)
47 {
48 	DECLARE_GLOBAL_DATA_PTR;
49 	return gd->arch.at91_pllb_usb_init;
50 }
51 
52 #ifdef CPU_HAS_H32MXDIV
53 static inline unsigned int get_h32mxdiv(void)
54 {
55 	struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC;
56 
57 	return readl(&pmc->mckr) & AT91_PMC_MCKR_H32MXDIV;
58 }
59 #else
60 static inline unsigned int get_h32mxdiv(void)
61 {
62 	return 0;
63 }
64 #endif
65 
66 static inline unsigned long get_macb_pclk_rate(unsigned int dev_id)
67 {
68 	if (get_h32mxdiv())
69 		return get_mck_clk_rate() / 2;
70 	else
71 		return get_mck_clk_rate();
72 }
73 
74 static inline unsigned long get_usart_clk_rate(unsigned int dev_id)
75 {
76 	if (get_h32mxdiv())
77 		return get_mck_clk_rate() / 2;
78 	else
79 		return get_mck_clk_rate();
80 }
81 
82 static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id)
83 {
84 	return get_mck_clk_rate();
85 }
86 
87 static inline unsigned long get_spi_clk_rate(unsigned int dev_id)
88 {
89 	if (get_h32mxdiv())
90 		return get_mck_clk_rate() / 2;
91 	else
92 		return get_mck_clk_rate();
93 }
94 
95 static inline unsigned long get_twi_clk_rate(unsigned int dev_id)
96 {
97 	if (get_h32mxdiv())
98 		return get_mck_clk_rate() / 2;
99 	else
100 		return get_mck_clk_rate();
101 }
102 
103 static inline unsigned long get_mci_clk_rate(void)
104 {
105 	if (get_h32mxdiv())
106 		return get_mck_clk_rate() / 2;
107 	else
108 		return get_mck_clk_rate();
109 }
110 
111 static inline unsigned long get_pit_clk_rate(void)
112 {
113 	if (get_h32mxdiv())
114 		return get_mck_clk_rate() / 2;
115 	else
116 		return get_mck_clk_rate();
117 }
118 
119 int at91_clock_init(unsigned long main_clock);
120 void at91_periph_clk_enable(int id);
121 void at91_periph_clk_disable(int id);
122 #endif /* __ASM_ARM_ARCH_CLK_H__ */
123