1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
/*
* For Hisilicon Hi6220 SoC, the reset of some hosts (e.g. UART) should be disabled
* before using them, this driver will handle the host chip reset disable.
*
* Copyright (C) 2015 Hisilicon Ltd.
* Author: Bintian Wang <bintian.wang@huawei.com>
*
*/
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#define reset_offset 0x334
#define pclk_offset 0x230
#define PMUSSI_REG_EX(pmu_base, reg_addr) (((reg_addr) << 2) + (char *)pmu_base)
static int __init hi6220_sysconf(void)
{
static void __iomem *base = NULL, *base1 = NULL;
struct device_node *node, *node1;
unsigned char ret;
node = of_find_compatible_node(NULL, NULL, "hisilicon,hi6220-sysctrl");
if (!node)
return -ENOENT;
base = of_iomap(node, 0);
if (base == NULL) {
printk(KERN_ERR "hi6220: sysctrl reg iomap failed!\n");
return -ENOMEM;
}
node1 = of_find_compatible_node(NULL, NULL, "hisilicon,hi655x-pmic-driver");
if (!node1)
return -ENOENT;
base1 = of_iomap(node1, 0);
if (base1 == NULL) {
printk(KERN_ERR "hi6220: pmic reg iomap failed!\n");
return -ENOMEM;
}
/*Disable UART1 reset and set pclk*/
writel(BIT(5), base + reset_offset);
writel(BIT(5), base + pclk_offset);
/*Disable UART2 reset and set pclk*/
writel(BIT(6), base + reset_offset);
writel(BIT(6), base + pclk_offset);
/*Disable UART3 reset and set pclk*/
writel(BIT(7), base + reset_offset);
writel(BIT(7), base + pclk_offset);
/*Disable UART4 reset and set pclk*/
writel(BIT(8), base + reset_offset);
writel(BIT(8), base + pclk_offset);
/*unreset microSD*/
writel(readl(base+0x304) | 0x6, base + 0x304);
/*enable clk for BT/WIFI*/
ret = *(volatile unsigned char*)PMUSSI_REG_EX(base1, 0x1c);
ret |= 0x40;
*(volatile unsigned char*)PMUSSI_REG_EX(base1, 0x1c) = ret;
iounmap(base);
iounmap(base1);
return 0;
}
postcore_initcall(hi6220_sysconf);
#ifdef CONFIG_ARM64
#ifdef CONFIG_SPARSE_IRQ
#define NR_IRQS_LEGACY_HI6220 16
int __init arch_probe_nr_irqs(void)
{
return NR_IRQS_LEGACY_HI6220;
}
#endif
#endif
|
