1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (C) 2016-2017 Intel Corporation <www.intel.com>
4 */
5
6 #include <asm/arch/pinmux.h>
7 #include <asm/io.h>
8 #include <common.h>
9 #include <fdtdec.h>
10
do_pinctr_pin(const void * blob,int child,const char * node_name)11 static int do_pinctr_pin(const void *blob, int child, const char *node_name)
12 {
13 int len;
14 fdt_addr_t base_addr;
15 fdt_size_t size;
16 const u32 *cell;
17 u32 offset, value;
18
19 base_addr = fdtdec_get_addr_size(blob, child, "reg", &size);
20 if (base_addr != FDT_ADDR_T_NONE) {
21 cell = fdt_getprop(blob, child, "pinctrl-single,pins", &len);
22 if (!cell || len <= 0)
23 return -EFAULT;
24
25 debug("%p %d\n", cell, len);
26 for (; len > 0; len -= (2 * sizeof(u32))) {
27 offset = fdt32_to_cpu(*cell++);
28 value = fdt32_to_cpu(*cell++);
29 debug("<0x%x 0x%x>\n", offset, value);
30 writel(value, base_addr + offset);
31 }
32 return 0;
33 }
34 return -EFAULT;
35 }
36
do_pinctrl_pins(const void * blob,int node,const char * child_name)37 static int do_pinctrl_pins(const void *blob, int node, const char *child_name)
38 {
39 int child, len;
40 const char *node_name;
41
42 child = fdt_first_subnode(blob, node);
43
44 if (child < 0)
45 return -EINVAL;
46
47 node_name = fdt_get_name(blob, child, &len);
48
49 while (node_name) {
50 if (!strcmp(child_name, node_name))
51 return do_pinctr_pin(blob, child, node_name);
52
53 child = fdt_next_subnode(blob, child);
54
55 if (child < 0)
56 break;
57
58 node_name = fdt_get_name(blob, child, &len);
59 }
60
61 return -EFAULT;
62 }
63
config_dedicated_pins(const void * blob)64 int config_dedicated_pins(const void *blob)
65 {
66 int node;
67
68 node = fdtdec_next_compatible(blob, 0,
69 COMPAT_ALTERA_SOCFPGA_PINCTRL_SINGLE);
70 if (node < 0)
71 return -EINVAL;
72
73 if (do_pinctrl_pins(blob, node, "dedicated_cfg"))
74 return -EFAULT;
75
76 if (do_pinctrl_pins(blob, node, "dedicated"))
77 return -EFAULT;
78
79 return 0;
80 }
81
config_pins(const void * blob,const char * pin_grp)82 int config_pins(const void *blob, const char *pin_grp)
83 {
84 int node;
85
86 node = fdtdec_next_compatible(blob, 0,
87 COMPAT_ALTERA_SOCFPGA_PINCTRL_SINGLE);
88 if (node < 0)
89 return -EINVAL;
90
91 if (do_pinctrl_pins(blob, node, pin_grp))
92 return -EFAULT;
93
94 return 0;
95 }
96