drivers/pinctrl/freescale/pinctrl-imx8ulp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright 2021 NXP
   4  */
   5
   6 #include <linux/err.h>
   7 #include <linux/init.h>
   8 #include <linux/io.h>
   9 #include <linux/mod_devicetable.h>
  10 #include <linux/module.h>
  11 #include <linux/pinctrl/pinctrl.h>
  12 #include <linux/platform_device.h>
  13
  14 #include "pinctrl-imx.h"
  15
  16 enum imx8ulp_pads {
  17         IMX8ULP_PAD_PTD0 = 0,
  18         IMX8ULP_PAD_PTD1,
  19         IMX8ULP_PAD_PTD2,
  20         IMX8ULP_PAD_PTD3,
  21         IMX8ULP_PAD_PTD4,
  22         IMX8ULP_PAD_PTD5,
  23         IMX8ULP_PAD_PTD6,
  24         IMX8ULP_PAD_PTD7,
  25         IMX8ULP_PAD_PTD8,
  26         IMX8ULP_PAD_PTD9,
  27         IMX8ULP_PAD_PTD10,
  28         IMX8ULP_PAD_PTD11,
  29         IMX8ULP_PAD_PTD12,
  30         IMX8ULP_PAD_PTD13,
  31         IMX8ULP_PAD_PTD14,
  32         IMX8ULP_PAD_PTD15,
  33         IMX8ULP_PAD_PTD16,
  34         IMX8ULP_PAD_PTD17,
  35         IMX8ULP_PAD_PTD18,
  36         IMX8ULP_PAD_PTD19,
  37         IMX8ULP_PAD_PTD20,
  38         IMX8ULP_PAD_PTD21,
  39         IMX8ULP_PAD_PTD22,
  40         IMX8ULP_PAD_PTD23,
  41         IMX8ULP_PAD_RESERVE0,
  42         IMX8ULP_PAD_RESERVE1,
  43         IMX8ULP_PAD_RESERVE2,
  44         IMX8ULP_PAD_RESERVE3,
  45         IMX8ULP_PAD_RESERVE4,
  46         IMX8ULP_PAD_RESERVE5,
  47         IMX8ULP_PAD_RESERVE6,
  48         IMX8ULP_PAD_RESERVE7,
  49         IMX8ULP_PAD_PTE0,
  50         IMX8ULP_PAD_PTE1,
  51         IMX8ULP_PAD_PTE2,
  52         IMX8ULP_PAD_PTE3,
  53         IMX8ULP_PAD_PTE4,
  54         IMX8ULP_PAD_PTE5,
  55         IMX8ULP_PAD_PTE6,
  56         IMX8ULP_PAD_PTE7,
  57         IMX8ULP_PAD_PTE8,
  58         IMX8ULP_PAD_PTE9,
  59         IMX8ULP_PAD_PTE10,
  60         IMX8ULP_PAD_PTE11,
  61         IMX8ULP_PAD_PTE12,
  62         IMX8ULP_PAD_PTE13,
  63         IMX8ULP_PAD_PTE14,
  64         IMX8ULP_PAD_PTE15,
  65         IMX8ULP_PAD_PTE16,
  66         IMX8ULP_PAD_PTE17,
  67         IMX8ULP_PAD_PTE18,
  68         IMX8ULP_PAD_PTE19,
  69         IMX8ULP_PAD_PTE20,
  70         IMX8ULP_PAD_PTE21,
  71         IMX8ULP_PAD_PTE22,
  72         IMX8ULP_PAD_PTE23,
  73         IMX8ULP_PAD_RESERVE8,
  74         IMX8ULP_PAD_RESERVE9,
  75         IMX8ULP_PAD_RESERVE10,
  76         IMX8ULP_PAD_RESERVE11,
  77         IMX8ULP_PAD_RESERVE12,
  78         IMX8ULP_PAD_RESERVE13,
  79         IMX8ULP_PAD_RESERVE14,
  80         IMX8ULP_PAD_RESERVE15,
  81         IMX8ULP_PAD_PTF0,
  82         IMX8ULP_PAD_PTF1,
  83         IMX8ULP_PAD_PTF2,
  84         IMX8ULP_PAD_PTF3,
  85         IMX8ULP_PAD_PTF4,
  86         IMX8ULP_PAD_PTF5,
  87         IMX8ULP_PAD_PTF6,
  88         IMX8ULP_PAD_PTF7,
  89         IMX8ULP_PAD_PTF8,
  90         IMX8ULP_PAD_PTF9,
  91         IMX8ULP_PAD_PTF10,
  92         IMX8ULP_PAD_PTF11,
  93         IMX8ULP_PAD_PTF12,
  94         IMX8ULP_PAD_PTF13,
  95         IMX8ULP_PAD_PTF14,
  96         IMX8ULP_PAD_PTF15,
  97         IMX8ULP_PAD_PTF16,
  98         IMX8ULP_PAD_PTF17,
  99         IMX8ULP_PAD_PTF18,
 100         IMX8ULP_PAD_PTF19,
 101         IMX8ULP_PAD_PTF20,
 102         IMX8ULP_PAD_PTF21,
 103         IMX8ULP_PAD_PTF22,
 104         IMX8ULP_PAD_PTF23,
 105         IMX8ULP_PAD_PTF24,
 106         IMX8ULP_PAD_PTF25,
 107         IMX8ULP_PAD_PTF26,
 108         IMX8ULP_PAD_PTF27,
 109         IMX8ULP_PAD_PTF28,
 110         IMX8ULP_PAD_PTF29,
 111         IMX8ULP_PAD_PTF30,
 112         IMX8ULP_PAD_PTF31,
 113 };
 114
 115 /* Pad names for the pinmux subsystem */
 116 static const struct pinctrl_pin_desc imx8ulp_pinctrl_pads[] = {
 117         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD0),
 118         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD1),
 119         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD2),
 120         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD3),
 121         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD4),
 122         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD5),
 123         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD6),
 124         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD7),
 125         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD8),
 126         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD9),
 127         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD10),
 128         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD11),
 129         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD12),
 130         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD13),
 131         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD14),
 132         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD15),
 133         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD16),
 134         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD17),
 135         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD18),
 136         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD19),
 137         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD20),
 138         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD21),
 139         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD22),
 140         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTD23),
 141         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE0),
 142         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE1),
 143         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE2),
 144         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE3),
 145         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE4),
 146         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE5),
 147         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE6),
 148         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE7),
 149         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE0),
 150         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE1),
 151         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE2),
 152         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE3),
 153         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE4),
 154         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE5),
 155         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE6),
 156         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE7),
 157         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE8),
 158         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE9),
 159         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE10),
 160         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE11),
 161         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE12),
 162         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE13),
 163         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE14),
 164         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE15),
 165         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE16),
 166         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE17),
 167         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE18),
 168         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE19),
 169         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE20),
 170         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE21),
 171         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE22),
 172         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTE23),
 173         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE8),
 174         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE9),
 175         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE10),
 176         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE11),
 177         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE12),
 178         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE13),
 179         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE14),
 180         IMX_PINCTRL_PIN(IMX8ULP_PAD_RESERVE15),
 181         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF0),
 182         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF1),
 183         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF2),
 184         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF3),
 185         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF4),
 186         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF5),
 187         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF6),
 188         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF7),
 189         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF8),
 190         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF9),
 191         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF10),
 192         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF11),
 193         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF12),
 194         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF13),
 195         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF14),
 196         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF15),
 197         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF16),
 198         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF17),
 199         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF18),
 200         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF19),
 201         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF20),
 202         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF21),
 203         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF22),
 204         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF23),
 205         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF24),
 206         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF25),
 207         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF26),
 208         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF27),
 209         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF28),
 210         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF29),
 211         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF30),
 212         IMX_PINCTRL_PIN(IMX8ULP_PAD_PTF31),
 213 };
 214
 215 #define BM_OBE_ENABLED          BIT(17)
 216 #define BM_IBE_ENABLED          BIT(16)
 217 #define BM_MUX_MODE             0xf00
 218 #define BP_MUX_MODE             8
 219
 220 static int imx8ulp_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
 221                                           struct pinctrl_gpio_range *range,
 222                                           unsigned offset, bool input)
 223 {
 224         struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
 225         const struct imx_pin_reg *pin_reg;
 226         u32 reg;
 227
 228         pin_reg = &ipctl->pin_regs[offset];
 229         if (pin_reg->mux_reg == -1)
 230                 return -EINVAL;
 231
 232         reg = readl(ipctl->base + pin_reg->mux_reg);
 233         if (input)
 234                 reg = (reg & ~BM_OBE_ENABLED) | BM_IBE_ENABLED;
 235         else
 236                 reg = (reg & ~BM_IBE_ENABLED) | BM_OBE_ENABLED;
 237         writel(reg, ipctl->base + pin_reg->mux_reg);
 238
 239         return 0;
 240 }
 241
 242 static const struct imx_pinctrl_soc_info imx8ulp_pinctrl_info = {
 243         .pins = imx8ulp_pinctrl_pads,
 244         .npins = ARRAY_SIZE(imx8ulp_pinctrl_pads),
 245         .flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG,
 246         .gpio_set_direction = imx8ulp_pmx_gpio_set_direction,
 247         .mux_mask = BM_MUX_MODE,
 248         .mux_shift = BP_MUX_MODE,
 249 };
 250
 251 static const struct of_device_id imx8ulp_pinctrl_of_match[] = {
 252         { .compatible = "fsl,imx8ulp-iomuxc1", },
 253         { /* sentinel */ }
 254 };
 255
 256 static int imx8ulp_pinctrl_probe(struct platform_device *pdev)
 257 {
 258         return imx_pinctrl_probe(pdev, &imx8ulp_pinctrl_info);
 259 }
 260
 261 static struct platform_driver imx8ulp_pinctrl_driver = {
 262         .driver = {
 263                 .name = "imx8ulp-pinctrl",
 264                 .of_match_table = imx8ulp_pinctrl_of_match,
 265                 .suppress_bind_attrs = true,
 266         },
 267         .probe = imx8ulp_pinctrl_probe,
 268 };
 269
 270 static int __init imx8ulp_pinctrl_init(void)
 271 {
 272         return platform_driver_register(&imx8ulp_pinctrl_driver);
 273 }
 274 arch_initcall(imx8ulp_pinctrl_init);
 275
 276 MODULE_AUTHOR("Jacky Bai <[email protected]>");
 277 MODULE_DESCRIPTION("NXP i.MX8ULP pinctrl driver");
 278 MODULE_LICENSE("GPL v2");