1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2007-2012
4  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
5  * Tom Cubie <tangliang@allwinnertech.com>
6  *
7  * (C) Copyright 2013 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
8  */
9 
10 #include <common.h>
11 #include <asm/io.h>
12 #include <asm/arch/clock.h>
13 #include <asm/arch/gpio.h>
14 #include <asm/arch/prcm.h>
15 #include <asm/arch/gtbus.h>
16 #include <asm/arch/sys_proto.h>
17 
clock_init_sec(void)18 __weak void clock_init_sec(void)
19 {
20 }
21 
gtbus_init(void)22 __weak void gtbus_init(void)
23 {
24 }
25 
clock_init(void)26 int clock_init(void)
27 {
28 #ifdef CONFIG_SPL_BUILD
29 	clock_init_safe();
30 	gtbus_init();
31 #endif
32 	clock_init_uart();
33 	clock_init_sec();
34 
35 	return 0;
36 }
37 
38 /* These functions are shared between various SoCs so put them here. */
39 #if defined CONFIG_SUNXI_GEN_SUN6I && !defined CONFIG_MACH_SUN9I
clock_twi_onoff(int port,int state)40 int clock_twi_onoff(int port, int state)
41 {
42 	struct sunxi_ccm_reg *const ccm =
43 		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
44 
45 	if (port == 5) {
46 		if (state)
47 			prcm_apb0_enable(
48 				PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_I2C);
49 		else
50 			prcm_apb0_disable(
51 				PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_I2C);
52 		return 0;
53 	}
54 
55 	/* set the apb clock gate and reset for twi */
56 	if (state) {
57 		setbits_le32(&ccm->apb2_gate,
58 			     CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT + port));
59 		setbits_le32(&ccm->apb2_reset_cfg,
60 			     1 << (APB2_RESET_TWI_SHIFT + port));
61 	} else {
62 		clrbits_le32(&ccm->apb2_reset_cfg,
63 			     1 << (APB2_RESET_TWI_SHIFT + port));
64 		clrbits_le32(&ccm->apb2_gate,
65 			     CLK_GATE_OPEN << (APB2_GATE_TWI_SHIFT + port));
66 	}
67 
68 	return 0;
69 }
70 #endif
71