drivers/pinctrl/pinctrl-sandbox.c

   1 /*
   2  * Copyright (C) 2015  Masahiro Yamada <yamada.masahiro@socionext.com>
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 /* #define DEBUG */
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <dm/pinctrl.h>
  12
  13 static const char * const sandbox_pins[] = {
  14         "SCL",
  15         "SDA",
  16         "TX",
  17         "RX",
  18 };
  19
  20 static const char * const sandbox_groups[] = {
  21         "i2c",
  22         "serial_a",
  23         "serial_b",
  24         "spi",
  25 };
  26
  27 static const char * const sandbox_functions[] = {
  28         "i2c",
  29         "serial",
  30         "spi",
  31 };
  32
  33 static const struct pinconf_param sandbox_conf_params[] = {
  34         { "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
  35         { "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
  36         { "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
  37         { "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
  38         { "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
  39         { "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
  40         { "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
  41         { "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
  42         { "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
  43         { "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
  44         { "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
  45 };
  46
  47 static int sandbox_get_pins_count(struct udevice *dev)
  48 {
  49         return ARRAY_SIZE(sandbox_pins);
  50 }
  51
  52 static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
  53 {
  54         return sandbox_pins[selector];
  55 }
  56
  57 static int sandbox_get_groups_count(struct udevice *dev)
  58 {
  59         return ARRAY_SIZE(sandbox_groups);
  60 }
  61
  62 static const char *sandbox_get_group_name(struct udevice *dev,
  63                                           unsigned selector)
  64 {
  65         return sandbox_groups[selector];
  66 }
  67
  68 static int sandbox_get_functions_count(struct udevice *dev)
  69 {
  70         return ARRAY_SIZE(sandbox_functions);
  71 }
  72
  73 static const char *sandbox_get_function_name(struct udevice *dev,
  74                                              unsigned selector)
  75 {
  76         return sandbox_functions[selector];
  77 }
  78
  79 static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
  80                               unsigned func_selector)
  81 {
  82         debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
  83               pin_selector, sandbox_get_pin_name(dev, pin_selector),
  84               func_selector, sandbox_get_function_name(dev, func_selector));
  85
  86         return 0;
  87 }
  88
  89 static int sandbox_pinmux_group_set(struct udevice *dev,
  90                                     unsigned group_selector,
  91                                     unsigned func_selector)
  92 {
  93         debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
  94               group_selector, sandbox_get_group_name(dev, group_selector),
  95               func_selector, sandbox_get_function_name(dev, func_selector));
  96
  97         return 0;
  98 }
  99
 100 static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
 101                                unsigned param, unsigned argument)
 102 {
 103         debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
 104               pin_selector, sandbox_get_pin_name(dev, pin_selector),
 105               param, argument);
 106
 107         return 0;
 108 }
 109
 110 static int sandbox_pinconf_group_set(struct udevice *dev,
 111                                      unsigned group_selector,
 112                                      unsigned param, unsigned argument)
 113 {
 114         debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
 115               group_selector, sandbox_get_group_name(dev, group_selector),
 116               param, argument);
 117
 118         return 0;
 119 }
 120
 121 const struct pinctrl_ops sandbox_pinctrl_ops = {
 122         .get_pins_count = sandbox_get_pins_count,
 123         .get_pin_name = sandbox_get_pin_name,
 124         .get_groups_count = sandbox_get_groups_count,
 125         .get_group_name = sandbox_get_group_name,
 126         .get_functions_count = sandbox_get_functions_count,
 127         .get_function_name = sandbox_get_function_name,
 128         .pinmux_set = sandbox_pinmux_set,
 129         .pinmux_group_set = sandbox_pinmux_group_set,
 130         .pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
 131         .pinconf_params = sandbox_conf_params,
 132         .pinconf_set = sandbox_pinconf_set,
 133         .pinconf_group_set = sandbox_pinconf_group_set,
 134         .set_state = pinctrl_generic_set_state,
 135 };
 136
 137 static const struct udevice_id sandbox_pinctrl_match[] = {
 138         { .compatible = "sandbox,pinctrl" },
 139         { /* sentinel */ }
 140 };
 141
 142 U_BOOT_DRIVER(sandbox_pinctrl) = {
 143         .name = "sandbox_pinctrl",
 144         .id = UCLASS_PINCTRL,
 145         .of_match = sandbox_pinctrl_match,
 146         .ops = &sandbox_pinctrl_ops,
 147 };