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 <asm/arch/pinmux.h>
   7#include <asm/io.h>
   8#include <common.h>
   9#include <fdtdec.h>
  10
  11static 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
  37static 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
  64int 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
  82int 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