LXR uboot/arch/arm/mach-socfpga/pinmux

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 *  Copyright (C) 2016-2017 Intel Corporation <www.intel.com>
   4 */
   5
   6#include <log.h>
   7#include <asm/arch/pinmux.h>
   8#include <asm/io.h>
   9#include <common.h>
  10#include <fdtdec.h>
  11
  12static 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
  38static 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
  65int 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
  83int 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}
  97