arch/arm/mach-socfpga/pinmux_arria10.c

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