drivers/pinctrl/freescale/pinctrl-imx7ulp.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (C) 2016 Freescale Semiconductor, Inc.
   4 // Copyright (C) 2017 NXP
   5 //
   6 // Author: Dong Aisheng <aisheng.dong@nxp.com>
   7
   8 #include <linux/err.h>
   9 #include <linux/init.h>
  10 #include <linux/io.h>
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/of_device.h>
  14 #include <linux/pinctrl/pinctrl.h>
  15
  16 #include "pinctrl-imx.h"
  17
  18 enum imx7ulp_pads {
  19         IMX7ULP_PAD_PTC0 = 0,
  20         IMX7ULP_PAD_PTC1,
  21         IMX7ULP_PAD_PTC2,
  22         IMX7ULP_PAD_PTC3,
  23         IMX7ULP_PAD_PTC4,
  24         IMX7ULP_PAD_PTC5,
  25         IMX7ULP_PAD_PTC6,
  26         IMX7ULP_PAD_PTC7,
  27         IMX7ULP_PAD_PTC8,
  28         IMX7ULP_PAD_PTC9,
  29         IMX7ULP_PAD_PTC10,
  30         IMX7ULP_PAD_PTC11,
  31         IMX7ULP_PAD_PTC12,
  32         IMX7ULP_PAD_PTC13,
  33         IMX7ULP_PAD_PTC14,
  34         IMX7ULP_PAD_PTC15,
  35         IMX7ULP_PAD_PTC16,
  36         IMX7ULP_PAD_PTC17,
  37         IMX7ULP_PAD_PTC18,
  38         IMX7ULP_PAD_PTC19,
  39         IMX7ULP_PAD_RESERVE0,
  40         IMX7ULP_PAD_RESERVE1,
  41         IMX7ULP_PAD_RESERVE2,
  42         IMX7ULP_PAD_RESERVE3,
  43         IMX7ULP_PAD_RESERVE4,
  44         IMX7ULP_PAD_RESERVE5,
  45         IMX7ULP_PAD_RESERVE6,
  46         IMX7ULP_PAD_RESERVE7,
  47         IMX7ULP_PAD_RESERVE8,
  48         IMX7ULP_PAD_RESERVE9,
  49         IMX7ULP_PAD_RESERVE10,
  50         IMX7ULP_PAD_RESERVE11,
  51         IMX7ULP_PAD_PTD0,
  52         IMX7ULP_PAD_PTD1,
  53         IMX7ULP_PAD_PTD2,
  54         IMX7ULP_PAD_PTD3,
  55         IMX7ULP_PAD_PTD4,
  56         IMX7ULP_PAD_PTD5,
  57         IMX7ULP_PAD_PTD6,
  58         IMX7ULP_PAD_PTD7,
  59         IMX7ULP_PAD_PTD8,
  60         IMX7ULP_PAD_PTD9,
  61         IMX7ULP_PAD_PTD10,
  62         IMX7ULP_PAD_PTD11,
  63         IMX7ULP_PAD_RESERVE12,
  64         IMX7ULP_PAD_RESERVE13,
  65         IMX7ULP_PAD_RESERVE14,
  66         IMX7ULP_PAD_RESERVE15,
  67         IMX7ULP_PAD_RESERVE16,
  68         IMX7ULP_PAD_RESERVE17,
  69         IMX7ULP_PAD_RESERVE18,
  70         IMX7ULP_PAD_RESERVE19,
  71         IMX7ULP_PAD_RESERVE20,
  72         IMX7ULP_PAD_RESERVE21,
  73         IMX7ULP_PAD_RESERVE22,
  74         IMX7ULP_PAD_RESERVE23,
  75         IMX7ULP_PAD_RESERVE24,
  76         IMX7ULP_PAD_RESERVE25,
  77         IMX7ULP_PAD_RESERVE26,
  78         IMX7ULP_PAD_RESERVE27,
  79         IMX7ULP_PAD_RESERVE28,
  80         IMX7ULP_PAD_RESERVE29,
  81         IMX7ULP_PAD_RESERVE30,
  82         IMX7ULP_PAD_RESERVE31,
  83         IMX7ULP_PAD_PTE0,
  84         IMX7ULP_PAD_PTE1,
  85         IMX7ULP_PAD_PTE2,
  86         IMX7ULP_PAD_PTE3,
  87         IMX7ULP_PAD_PTE4,
  88         IMX7ULP_PAD_PTE5,
  89         IMX7ULP_PAD_PTE6,
  90         IMX7ULP_PAD_PTE7,
  91         IMX7ULP_PAD_PTE8,
  92         IMX7ULP_PAD_PTE9,
  93         IMX7ULP_PAD_PTE10,
  94         IMX7ULP_PAD_PTE11,
  95         IMX7ULP_PAD_PTE12,
  96         IMX7ULP_PAD_PTE13,
  97         IMX7ULP_PAD_PTE14,
  98         IMX7ULP_PAD_PTE15,
  99         IMX7ULP_PAD_RESERVE32,
 100         IMX7ULP_PAD_RESERVE33,
 101         IMX7ULP_PAD_RESERVE34,
 102         IMX7ULP_PAD_RESERVE35,
 103         IMX7ULP_PAD_RESERVE36,
 104         IMX7ULP_PAD_RESERVE37,
 105         IMX7ULP_PAD_RESERVE38,
 106         IMX7ULP_PAD_RESERVE39,
 107         IMX7ULP_PAD_RESERVE40,
 108         IMX7ULP_PAD_RESERVE41,
 109         IMX7ULP_PAD_RESERVE42,
 110         IMX7ULP_PAD_RESERVE43,
 111         IMX7ULP_PAD_RESERVE44,
 112         IMX7ULP_PAD_RESERVE45,
 113         IMX7ULP_PAD_RESERVE46,
 114         IMX7ULP_PAD_RESERVE47,
 115         IMX7ULP_PAD_PTF0,
 116         IMX7ULP_PAD_PTF1,
 117         IMX7ULP_PAD_PTF2,
 118         IMX7ULP_PAD_PTF3,
 119         IMX7ULP_PAD_PTF4,
 120         IMX7ULP_PAD_PTF5,
 121         IMX7ULP_PAD_PTF6,
 122         IMX7ULP_PAD_PTF7,
 123         IMX7ULP_PAD_PTF8,
 124         IMX7ULP_PAD_PTF9,
 125         IMX7ULP_PAD_PTF10,
 126         IMX7ULP_PAD_PTF11,
 127         IMX7ULP_PAD_PTF12,
 128         IMX7ULP_PAD_PTF13,
 129         IMX7ULP_PAD_PTF14,
 130         IMX7ULP_PAD_PTF15,
 131         IMX7ULP_PAD_PTF16,
 132         IMX7ULP_PAD_PTF17,
 133         IMX7ULP_PAD_PTF18,
 134         IMX7ULP_PAD_PTF19,
 135 };
 136
 137 /* Pad names for the pinmux subsystem */
 138 static const struct pinctrl_pin_desc imx7ulp_pinctrl_pads[] = {
 139         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC0),
 140         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC1),
 141         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC2),
 142         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC3),
 143         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC4),
 144         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC5),
 145         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC6),
 146         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC7),
 147         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC8),
 148         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC9),
 149         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC10),
 150         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC11),
 151         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC12),
 152         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC13),
 153         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC14),
 154         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC15),
 155         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC16),
 156         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC17),
 157         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC18),
 158         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTC19),
 159         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE0),
 160         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE1),
 161         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE2),
 162         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE3),
 163         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE4),
 164         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE5),
 165         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE6),
 166         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE7),
 167         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE8),
 168         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE9),
 169         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE10),
 170         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE11),
 171         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD0),
 172         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD1),
 173         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD2),
 174         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD3),
 175         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD4),
 176         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD5),
 177         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD6),
 178         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD7),
 179         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD8),
 180         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD9),
 181         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD10),
 182         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTD11),
 183         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE12),
 184         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE13),
 185         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE14),
 186         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE15),
 187         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE16),
 188         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE17),
 189         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE18),
 190         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE19),
 191         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE20),
 192         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE21),
 193         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE22),
 194         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE23),
 195         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE24),
 196         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE25),
 197         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE26),
 198         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE27),
 199         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE28),
 200         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE29),
 201         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE30),
 202         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE31),
 203         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE0),
 204         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE1),
 205         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE2),
 206         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE3),
 207         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE4),
 208         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE5),
 209         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE6),
 210         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE7),
 211         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE8),
 212         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE9),
 213         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE10),
 214         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE11),
 215         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE12),
 216         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE13),
 217         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE14),
 218         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTE15),
 219         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE32),
 220         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE33),
 221         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE34),
 222         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE35),
 223         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE36),
 224         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE37),
 225         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE38),
 226         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE39),
 227         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE40),
 228         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE41),
 229         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE42),
 230         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE43),
 231         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE44),
 232         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE45),
 233         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE46),
 234         IMX_PINCTRL_PIN(IMX7ULP_PAD_RESERVE47),
 235         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF0),
 236         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF1),
 237         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF2),
 238         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF3),
 239         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF4),
 240         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF5),
 241         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF6),
 242         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF7),
 243         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF8),
 244         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF9),
 245         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF10),
 246         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF11),
 247         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF12),
 248         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF13),
 249         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF14),
 250         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF15),
 251         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF16),
 252         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF17),
 253         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF18),
 254         IMX_PINCTRL_PIN(IMX7ULP_PAD_PTF19),
 255 };
 256
 257 #define BM_OBE_ENABLED          BIT(17)
 258 #define BM_IBE_ENABLED          BIT(16)
 259 #define BM_LK_ENABLED           BIT(15)
 260 #define BM_MUX_MODE             0xf00
 261 #define BP_MUX_MODE             8
 262 #define BM_PULL_ENABLED         BIT(1)
 263
 264 static const struct imx_cfg_params_decode imx7ulp_cfg_decodes[] = {
 265         IMX_CFG_PARAMS_DECODE(PIN_CONFIG_DRIVE_STRENGTH,                BIT(6), 6),
 266         IMX_CFG_PARAMS_DECODE(PIN_CONFIG_DRIVE_PUSH_PULL,               BIT(5), 5),
 267         IMX_CFG_PARAMS_DECODE(PIN_CONFIG_SLEW_RATE,                     BIT(2), 2),
 268         IMX_CFG_PARAMS_DECODE(PIN_CONFIG_BIAS_DISABLE,                  BIT(1), 1),
 269         IMX_CFG_PARAMS_DECODE(PIN_CONFIG_BIAS_PULL_UP,                  BIT(0), 0),
 270
 271         IMX_CFG_PARAMS_DECODE_INVERT(PIN_CONFIG_DRIVE_OPEN_DRAIN,       BIT(5), 5),
 272         IMX_CFG_PARAMS_DECODE_INVERT(PIN_CONFIG_BIAS_PULL_DOWN,         BIT(0), 0),
 273 };
 274
 275 static void imx7ulp_cfg_params_fixup(unsigned long *configs,
 276                                     unsigned int num_configs,
 277                                     u32 *raw_config)
 278 {
 279         enum pin_config_param param;
 280         u32 param_val;
 281         int i;
 282
 283         /* lock field disabled */
 284         *raw_config &= ~BM_LK_ENABLED;
 285
 286         for (i = 0; i < num_configs; i++) {
 287                 param = pinconf_to_config_param(configs[i]);
 288                 param_val = pinconf_to_config_argument(configs[i]);
 289
 290                 if ((param == PIN_CONFIG_BIAS_PULL_UP) ||
 291                     (param == PIN_CONFIG_BIAS_PULL_DOWN)) {
 292                         /* pull enabled */
 293                         *raw_config |= BM_PULL_ENABLED;
 294
 295                         return;
 296                 }
 297         }
 298 }
 299
 300 static int imx7ulp_pmx_gpio_set_direction(struct pinctrl_dev *pctldev,
 301                                           struct pinctrl_gpio_range *range,
 302                                           unsigned offset, bool input)
 303 {
 304         struct imx_pinctrl *ipctl = pinctrl_dev_get_drvdata(pctldev);
 305         const struct imx_pin_reg *pin_reg;
 306         u32 reg;
 307
 308         pin_reg = &ipctl->pin_regs[offset];
 309         if (pin_reg->mux_reg == -1)
 310                 return -EINVAL;
 311
 312         reg = readl(ipctl->base + pin_reg->mux_reg);
 313         if (input)
 314                 reg = (reg & ~BM_OBE_ENABLED) | BM_IBE_ENABLED;
 315         else
 316                 reg = (reg & ~BM_IBE_ENABLED) | BM_OBE_ENABLED;
 317         writel(reg, ipctl->base + pin_reg->mux_reg);
 318
 319         return 0;
 320 }
 321
 322 static const struct imx_pinctrl_soc_info imx7ulp_pinctrl_info = {
 323         .pins = imx7ulp_pinctrl_pads,
 324         .npins = ARRAY_SIZE(imx7ulp_pinctrl_pads),
 325         .flags = ZERO_OFFSET_VALID | SHARE_MUX_CONF_REG,
 326         .gpio_set_direction = imx7ulp_pmx_gpio_set_direction,
 327         .mux_mask = BM_MUX_MODE,
 328         .mux_shift = BP_MUX_MODE,
 329         .generic_pinconf = true,
 330         .decodes = imx7ulp_cfg_decodes,
 331         .num_decodes = ARRAY_SIZE(imx7ulp_cfg_decodes),
 332         .fixup = imx7ulp_cfg_params_fixup,
 333 };
 334
 335 static const struct of_device_id imx7ulp_pinctrl_of_match[] = {
 336         { .compatible = "fsl,imx7ulp-iomuxc1", },
 337         { /* sentinel */ }
 338 };
 339
 340 static int imx7ulp_pinctrl_probe(struct platform_device *pdev)
 341 {
 342         return imx_pinctrl_probe(pdev, &imx7ulp_pinctrl_info);
 343 }
 344
 345 static struct platform_driver imx7ulp_pinctrl_driver = {
 346         .driver = {
 347                 .name = "imx7ulp-pinctrl",
 348                 .of_match_table = of_match_ptr(imx7ulp_pinctrl_of_match),
 349                 .suppress_bind_attrs = true,
 350         },
 351         .probe = imx7ulp_pinctrl_probe,
 352 };
 353
 354 static int __init imx7ulp_pinctrl_init(void)
 355 {
 356         return platform_driver_register(&imx7ulp_pinctrl_driver);
 357 }
 358 arch_initcall(imx7ulp_pinctrl_init);