19e501086SMark Brown /* 29e501086SMark Brown * wm8994-core.c -- Device access for Wolfson WM8994 39e501086SMark Brown * 49e501086SMark Brown * Copyright 2009 Wolfson Microelectronics PLC. 59e501086SMark Brown * 69e501086SMark Brown * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 79e501086SMark Brown * 89e501086SMark Brown * This program is free software; you can redistribute it and/or modify it 99e501086SMark Brown * under the terms of the GNU General Public License as published by the 109e501086SMark Brown * Free Software Foundation; either version 2 of the License, or (at your 119e501086SMark Brown * option) any later version. 129e501086SMark Brown * 139e501086SMark Brown */ 149e501086SMark Brown 159e501086SMark Brown #include <linux/kernel.h> 169e501086SMark Brown #include <linux/module.h> 175a0e3ad6STejun Heo #include <linux/slab.h> 189e501086SMark Brown #include <linux/i2c.h> 19d6c645fcSMark Brown #include <linux/err.h> 209e501086SMark Brown #include <linux/delay.h> 219e501086SMark Brown #include <linux/mfd/core.h> 22d450f19eSMark Brown #include <linux/pm_runtime.h> 23d6c645fcSMark Brown #include <linux/regmap.h> 249e501086SMark Brown #include <linux/regulator/consumer.h> 259e501086SMark Brown #include <linux/regulator/machine.h> 269e501086SMark Brown 279e501086SMark Brown #include <linux/mfd/wm8994/core.h> 289e501086SMark Brown #include <linux/mfd/wm8994/pdata.h> 299e501086SMark Brown #include <linux/mfd/wm8994/registers.h> 309e501086SMark Brown 31c3f13861SMark Brown #include "wm8994.h" 329e501086SMark Brown 339e501086SMark Brown /** 349e501086SMark Brown * wm8994_reg_read: Read a single WM8994 register. 359e501086SMark Brown * 369e501086SMark Brown * @wm8994: Device to read from. 379e501086SMark Brown * @reg: Register to read. 389e501086SMark Brown */ 399e501086SMark Brown int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) 409e501086SMark Brown { 41d6c645fcSMark Brown unsigned int val; 429e501086SMark Brown int ret; 439e501086SMark Brown 44d6c645fcSMark Brown ret = regmap_read(wm8994->regmap, reg, &val); 459e501086SMark Brown 469e501086SMark Brown if (ret < 0) 479e501086SMark Brown return ret; 489e501086SMark Brown else 49d6c645fcSMark Brown return val; 509e501086SMark Brown } 519e501086SMark Brown EXPORT_SYMBOL_GPL(wm8994_reg_read); 529e501086SMark Brown 539e501086SMark Brown /** 549e501086SMark Brown * wm8994_bulk_read: Read multiple WM8994 registers 559e501086SMark Brown * 569e501086SMark Brown * @wm8994: Device to read from 579e501086SMark Brown * @reg: First register 589e501086SMark Brown * @count: Number of registers 59316b6cc0SMark Brown * @buf: Buffer to fill. The data will be returned big endian. 609e501086SMark Brown */ 619e501086SMark Brown int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, 629e501086SMark Brown int count, u16 *buf) 639e501086SMark Brown { 64d6c645fcSMark Brown return regmap_bulk_read(wm8994->regmap, reg, buf, count); 659e501086SMark Brown } 669e501086SMark Brown 679e501086SMark Brown /** 689e501086SMark Brown * wm8994_reg_write: Write a single WM8994 register. 699e501086SMark Brown * 709e501086SMark Brown * @wm8994: Device to write to. 719e501086SMark Brown * @reg: Register to write to. 729e501086SMark Brown * @val: Value to write. 739e501086SMark Brown */ 749e501086SMark Brown int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, 759e501086SMark Brown unsigned short val) 769e501086SMark Brown { 77d6c645fcSMark Brown return regmap_write(wm8994->regmap, reg, val); 789e501086SMark Brown } 799e501086SMark Brown EXPORT_SYMBOL_GPL(wm8994_reg_write); 809e501086SMark Brown 819e501086SMark Brown /** 82e93c5387SMark Brown * wm8994_bulk_write: Write multiple WM8994 registers 83e93c5387SMark Brown * 84e93c5387SMark Brown * @wm8994: Device to write to 85e93c5387SMark Brown * @reg: First register 86e93c5387SMark Brown * @count: Number of registers 874277163cSMark Brown * @buf: Buffer to write from. Data must be big-endian formatted. 88e93c5387SMark Brown */ 89e93c5387SMark Brown int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, 9007e73fbbSMark Brown int count, const u16 *buf) 91e93c5387SMark Brown { 92d6c645fcSMark Brown return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16)); 93e93c5387SMark Brown } 94e93c5387SMark Brown EXPORT_SYMBOL_GPL(wm8994_bulk_write); 95e93c5387SMark Brown 96e93c5387SMark Brown /** 979e501086SMark Brown * wm8994_set_bits: Set the value of a bitfield in a WM8994 register 989e501086SMark Brown * 999e501086SMark Brown * @wm8994: Device to write to. 1009e501086SMark Brown * @reg: Register to write to. 1019e501086SMark Brown * @mask: Mask of bits to set. 1029e501086SMark Brown * @val: Value to set (unshifted) 1039e501086SMark Brown */ 1049e501086SMark Brown int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, 1059e501086SMark Brown unsigned short mask, unsigned short val) 1069e501086SMark Brown { 107d6c645fcSMark Brown return regmap_update_bits(wm8994->regmap, reg, mask, val); 1089e501086SMark Brown } 1099e501086SMark Brown EXPORT_SYMBOL_GPL(wm8994_set_bits); 1109e501086SMark Brown 1119e501086SMark Brown static struct mfd_cell wm8994_regulator_devs[] = { 112d450f19eSMark Brown { 113d450f19eSMark Brown .name = "wm8994-ldo", 114d450f19eSMark Brown .id = 1, 115d450f19eSMark Brown .pm_runtime_no_callbacks = true, 116d450f19eSMark Brown }, 117d450f19eSMark Brown { 118d450f19eSMark Brown .name = "wm8994-ldo", 119d450f19eSMark Brown .id = 2, 120d450f19eSMark Brown .pm_runtime_no_callbacks = true, 121d450f19eSMark Brown }, 1229e501086SMark Brown }; 1239e501086SMark Brown 124c9fbf7e0SMark Brown static struct resource wm8994_codec_resources[] = { 125c9fbf7e0SMark Brown { 126c9fbf7e0SMark Brown .start = WM8994_IRQ_TEMP_SHUT, 127c9fbf7e0SMark Brown .end = WM8994_IRQ_TEMP_WARN, 128c9fbf7e0SMark Brown .flags = IORESOURCE_IRQ, 129c9fbf7e0SMark Brown }, 130c9fbf7e0SMark Brown }; 131c9fbf7e0SMark Brown 132c9fbf7e0SMark Brown static struct resource wm8994_gpio_resources[] = { 133c9fbf7e0SMark Brown { 134c9fbf7e0SMark Brown .start = WM8994_IRQ_GPIO(1), 135c9fbf7e0SMark Brown .end = WM8994_IRQ_GPIO(11), 136c9fbf7e0SMark Brown .flags = IORESOURCE_IRQ, 137c9fbf7e0SMark Brown }, 138c9fbf7e0SMark Brown }; 139c9fbf7e0SMark Brown 1409e501086SMark Brown static struct mfd_cell wm8994_devs[] = { 141c9fbf7e0SMark Brown { 142c9fbf7e0SMark Brown .name = "wm8994-codec", 143c9fbf7e0SMark Brown .num_resources = ARRAY_SIZE(wm8994_codec_resources), 144c9fbf7e0SMark Brown .resources = wm8994_codec_resources, 145c9fbf7e0SMark Brown }, 146c9fbf7e0SMark Brown 147c9fbf7e0SMark Brown { 148c9fbf7e0SMark Brown .name = "wm8994-gpio", 149c9fbf7e0SMark Brown .num_resources = ARRAY_SIZE(wm8994_gpio_resources), 150c9fbf7e0SMark Brown .resources = wm8994_gpio_resources, 151d450f19eSMark Brown .pm_runtime_no_callbacks = true, 152c9fbf7e0SMark Brown }, 1539e501086SMark Brown }; 1549e501086SMark Brown 1559e501086SMark Brown /* 1569e501086SMark Brown * Supplies for the main bulk of CODEC; the LDO supplies are ignored 1579e501086SMark Brown * and should be handled via the standard regulator API supply 1589e501086SMark Brown * management. 1599e501086SMark Brown */ 160b1f43bf3SMark Brown static const char *wm1811_main_supplies[] = { 161b1f43bf3SMark Brown "DBVDD1", 162b1f43bf3SMark Brown "DBVDD2", 163b1f43bf3SMark Brown "DBVDD3", 164b1f43bf3SMark Brown "DCVDD", 165b1f43bf3SMark Brown "AVDD1", 166b1f43bf3SMark Brown "AVDD2", 167b1f43bf3SMark Brown "CPVDD", 168b1f43bf3SMark Brown "SPKVDD1", 169b1f43bf3SMark Brown "SPKVDD2", 170b1f43bf3SMark Brown }; 171b1f43bf3SMark Brown 1729e501086SMark Brown static const char *wm8994_main_supplies[] = { 1739e501086SMark Brown "DBVDD", 1749e501086SMark Brown "DCVDD", 1759e501086SMark Brown "AVDD1", 1769e501086SMark Brown "AVDD2", 1779e501086SMark Brown "CPVDD", 1789e501086SMark Brown "SPKVDD1", 1799e501086SMark Brown "SPKVDD2", 1809e501086SMark Brown }; 1819e501086SMark Brown 182559e0df6SMark Brown static const char *wm8958_main_supplies[] = { 183559e0df6SMark Brown "DBVDD1", 184559e0df6SMark Brown "DBVDD2", 185559e0df6SMark Brown "DBVDD3", 186559e0df6SMark Brown "DCVDD", 187559e0df6SMark Brown "AVDD1", 188559e0df6SMark Brown "AVDD2", 189559e0df6SMark Brown "CPVDD", 190559e0df6SMark Brown "SPKVDD1", 191559e0df6SMark Brown "SPKVDD2", 192559e0df6SMark Brown }; 193559e0df6SMark Brown 1949e501086SMark Brown #ifdef CONFIG_PM 195d450f19eSMark Brown static int wm8994_suspend(struct device *dev) 1969e501086SMark Brown { 1979e501086SMark Brown struct wm8994 *wm8994 = dev_get_drvdata(dev); 1989e501086SMark Brown int ret; 1999e501086SMark Brown 20077bd70e9SMark Brown /* Don't actually go through with the suspend if the CODEC is 20177bd70e9SMark Brown * still active (eg, for audio passthrough from CP. */ 20277bd70e9SMark Brown ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); 20377bd70e9SMark Brown if (ret < 0) { 20477bd70e9SMark Brown dev_err(dev, "Failed to read power status: %d\n", ret); 20577bd70e9SMark Brown } else if (ret & WM8994_VMID_SEL_MASK) { 20677bd70e9SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 20777bd70e9SMark Brown return 0; 20877bd70e9SMark Brown } 20977bd70e9SMark Brown 2105f40c6b6SMark Brown ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4); 2115f40c6b6SMark Brown if (ret < 0) { 2125f40c6b6SMark Brown dev_err(dev, "Failed to read power status: %d\n", ret); 2135f40c6b6SMark Brown } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA | 2145f40c6b6SMark Brown WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA | 2155f40c6b6SMark Brown WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) { 2165f40c6b6SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 2175f40c6b6SMark Brown return 0; 2185f40c6b6SMark Brown } 2195f40c6b6SMark Brown 2205f40c6b6SMark Brown ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5); 2215f40c6b6SMark Brown if (ret < 0) { 2225f40c6b6SMark Brown dev_err(dev, "Failed to read power status: %d\n", ret); 2235f40c6b6SMark Brown } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA | 2245f40c6b6SMark Brown WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA | 2255f40c6b6SMark Brown WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) { 2265f40c6b6SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 2275f40c6b6SMark Brown return 0; 2285f40c6b6SMark Brown } 2295f40c6b6SMark Brown 2305f40c6b6SMark Brown switch (wm8994->type) { 2315f40c6b6SMark Brown case WM8958: 232b5488b6eSMark Brown case WM1811: 2335f40c6b6SMark Brown ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1); 2345f40c6b6SMark Brown if (ret < 0) { 2355f40c6b6SMark Brown dev_err(dev, "Failed to read power status: %d\n", ret); 2365f40c6b6SMark Brown } else if (ret & WM8958_MICD_ENA) { 2375f40c6b6SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 2385f40c6b6SMark Brown return 0; 2395f40c6b6SMark Brown } 2405f40c6b6SMark Brown break; 2415f40c6b6SMark Brown default: 2425f40c6b6SMark Brown break; 2435f40c6b6SMark Brown } 2445f40c6b6SMark Brown 245a3462490SMark Brown switch (wm8994->type) { 246a3462490SMark Brown case WM1811: 247a3462490SMark Brown ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2); 248a3462490SMark Brown if (ret < 0) { 249a3462490SMark Brown dev_err(dev, "Failed to read jackdet: %d\n", ret); 250a3462490SMark Brown } else if (ret & WM1811_JACKDET_MODE_MASK) { 251a3462490SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 252a3462490SMark Brown return 0; 253a3462490SMark Brown } 254a3462490SMark Brown break; 255a3462490SMark Brown default: 256a3462490SMark Brown break; 257a3462490SMark Brown } 258a3462490SMark Brown 259e7c248a0SMark Brown switch (wm8994->type) { 260e7c248a0SMark Brown case WM1811: 261e7c248a0SMark Brown ret = wm8994_reg_read(wm8994, WM8994_ANTIPOP_2); 262e7c248a0SMark Brown if (ret < 0) { 263e7c248a0SMark Brown dev_err(dev, "Failed to read jackdet: %d\n", ret); 264e7c248a0SMark Brown } else if (ret & WM1811_JACKDET_MODE_MASK) { 265e7c248a0SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 266e7c248a0SMark Brown return 0; 267e7c248a0SMark Brown } 268e7c248a0SMark Brown break; 269e7c248a0SMark Brown default: 270e7c248a0SMark Brown break; 271e7c248a0SMark Brown } 272e7c248a0SMark Brown 273881de670SMark Brown /* Disable LDO pulldowns while the device is suspended if we 274881de670SMark Brown * don't know that something will be driving them. */ 275881de670SMark Brown if (!wm8994->ldo_ena_always_driven) 276881de670SMark Brown wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 277881de670SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 278881de670SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD); 279881de670SMark Brown 280f40dff9eSMark Brown /* Explicitly put the device into reset in case regulators 281f40dff9eSMark Brown * don't get disabled in order to ensure consistent restart. 282f40dff9eSMark Brown */ 283be79cf2fSMark Brown wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 284be79cf2fSMark Brown wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); 285f40dff9eSMark Brown 286ed393dcdSMark Brown regcache_mark_dirty(wm8994->regmap); 287ed393dcdSMark Brown 28878a27cd3SChris Rattray /* Restore GPIO registers to prevent problems with mismatched 28978a27cd3SChris Rattray * pin configurations. 29078a27cd3SChris Rattray */ 291ed393dcdSMark Brown ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1, 292ed393dcdSMark Brown WM8994_GPIO_11); 29378a27cd3SChris Rattray if (ret != 0) 29478a27cd3SChris Rattray dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); 29578a27cd3SChris Rattray 2961a2017b7SMark Brown /* In case one of the GPIOs is used as a wake input. */ 2971a2017b7SMark Brown ret = regcache_sync_region(wm8994->regmap, 2981a2017b7SMark Brown WM8994_INTERRUPT_STATUS_1_MASK, 2991a2017b7SMark Brown WM8994_INTERRUPT_STATUS_1_MASK); 3001a2017b7SMark Brown if (ret != 0) 3011a2017b7SMark Brown dev_err(dev, "Failed to restore interrupt mask: %d\n", ret); 3021a2017b7SMark Brown 3033befc925SMark Brown regcache_cache_only(wm8994->regmap, true); 30477bd70e9SMark Brown wm8994->suspended = true; 30577bd70e9SMark Brown 306559e0df6SMark Brown ret = regulator_bulk_disable(wm8994->num_supplies, 3079e501086SMark Brown wm8994->supplies); 3089e501086SMark Brown if (ret != 0) { 3099e501086SMark Brown dev_err(dev, "Failed to disable supplies: %d\n", ret); 3109e501086SMark Brown return ret; 3119e501086SMark Brown } 3129e501086SMark Brown 3139e501086SMark Brown return 0; 3149e501086SMark Brown } 3159e501086SMark Brown 316d450f19eSMark Brown static int wm8994_resume(struct device *dev) 3179e501086SMark Brown { 3189e501086SMark Brown struct wm8994 *wm8994 = dev_get_drvdata(dev); 319c3f13861SMark Brown int ret; 3209e501086SMark Brown 32177bd70e9SMark Brown /* We may have lied to the PM core about suspending */ 32277bd70e9SMark Brown if (!wm8994->suspended) 32377bd70e9SMark Brown return 0; 32477bd70e9SMark Brown 325559e0df6SMark Brown ret = regulator_bulk_enable(wm8994->num_supplies, 3269e501086SMark Brown wm8994->supplies); 3279e501086SMark Brown if (ret != 0) { 3289e501086SMark Brown dev_err(dev, "Failed to enable supplies: %d\n", ret); 3299e501086SMark Brown return ret; 3309e501086SMark Brown } 3319e501086SMark Brown 3323befc925SMark Brown regcache_cache_only(wm8994->regmap, false); 333c3f13861SMark Brown ret = regcache_sync(wm8994->regmap); 334c3f13861SMark Brown if (ret != 0) { 335c3f13861SMark Brown dev_err(dev, "Failed to restore register map: %d\n", ret); 336c3f13861SMark Brown goto err_enable; 33798ae1ccaSMark Brown } 338c9fbf7e0SMark Brown 339881de670SMark Brown /* Disable LDO pulldowns while the device is active */ 340881de670SMark Brown wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 341881de670SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 342881de670SMark Brown 0); 343881de670SMark Brown 34477bd70e9SMark Brown wm8994->suspended = false; 34577bd70e9SMark Brown 3469e501086SMark Brown return 0; 347c3f13861SMark Brown 348c3f13861SMark Brown err_enable: 349c3f13861SMark Brown regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies); 350c3f13861SMark Brown 351c3f13861SMark Brown return ret; 3529e501086SMark Brown } 3539e501086SMark Brown #endif 3549e501086SMark Brown 3559e501086SMark Brown #ifdef CONFIG_REGULATOR 3569e501086SMark Brown static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 3579e501086SMark Brown { 3589e501086SMark Brown struct wm8994_ldo_pdata *ldo_pdata; 3599e501086SMark Brown 3609e501086SMark Brown if (!pdata) 3619e501086SMark Brown return 0; 3629e501086SMark Brown 3639e501086SMark Brown ldo_pdata = &pdata->ldo[ldo]; 3649e501086SMark Brown 3659e501086SMark Brown if (!ldo_pdata->init_data) 3669e501086SMark Brown return 0; 3679e501086SMark Brown 3689e501086SMark Brown return ldo_pdata->init_data->num_consumer_supplies != 0; 3699e501086SMark Brown } 3709e501086SMark Brown #else 3719e501086SMark Brown static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 3729e501086SMark Brown { 3739e501086SMark Brown return 0; 3749e501086SMark Brown } 3759e501086SMark Brown #endif 3769e501086SMark Brown 377a73e5df1SBill Pemberton static const struct reg_default wm8994_revc_patch[] = { 378462835e4SMark Brown { 0x102, 0x3 }, 379462835e4SMark Brown { 0x56, 0x3 }, 380462835e4SMark Brown { 0x817, 0x0 }, 381462835e4SMark Brown { 0x102, 0x0 }, 382462835e4SMark Brown }; 383462835e4SMark Brown 384a73e5df1SBill Pemberton static const struct reg_default wm8958_reva_patch[] = { 385462835e4SMark Brown { 0x102, 0x3 }, 386462835e4SMark Brown { 0xcb, 0x81 }, 387462835e4SMark Brown { 0x817, 0x0 }, 388462835e4SMark Brown { 0x102, 0x0 }, 389462835e4SMark Brown }; 390462835e4SMark Brown 391a73e5df1SBill Pemberton static const struct reg_default wm1811_reva_patch[] = { 392462835e4SMark Brown { 0x102, 0x3 }, 3939282a7b9SMark Brown { 0x56, 0xc07 }, 394462835e4SMark Brown { 0x5d, 0x7e }, 395462835e4SMark Brown { 0x5e, 0x0 }, 396462835e4SMark Brown { 0x102, 0x0 }, 397462835e4SMark Brown }; 398462835e4SMark Brown 3999e501086SMark Brown /* 4009e501086SMark Brown * Instantiate the generic non-control parts of the device. 4019e501086SMark Brown */ 402f791be49SBill Pemberton static int wm8994_device_init(struct wm8994 *wm8994, int irq) 4039e501086SMark Brown { 4049e501086SMark Brown struct wm8994_pdata *pdata = wm8994->dev->platform_data; 40534697898SMark Brown struct regmap_config *regmap_config; 406462835e4SMark Brown const struct reg_default *regmap_patch = NULL; 407559e0df6SMark Brown const char *devname; 408462835e4SMark Brown int ret, i, patch_regs; 40926c34c25SMark Brown int pulls = 0; 4109e501086SMark Brown 4119e501086SMark Brown dev_set_drvdata(wm8994->dev, wm8994); 4129e501086SMark Brown 4139e501086SMark Brown /* Add the on-chip regulators first for bootstrapping */ 4149e501086SMark Brown ret = mfd_add_devices(wm8994->dev, -1, 4159e501086SMark Brown wm8994_regulator_devs, 4169e501086SMark Brown ARRAY_SIZE(wm8994_regulator_devs), 41755692af5SMark Brown NULL, 0, NULL); 4189e501086SMark Brown if (ret != 0) { 4199e501086SMark Brown dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 4209db4249fSMark Brown goto err; 4219e501086SMark Brown } 4229e501086SMark Brown 423559e0df6SMark Brown switch (wm8994->type) { 424b1f43bf3SMark Brown case WM1811: 425b1f43bf3SMark Brown wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); 426b1f43bf3SMark Brown break; 427559e0df6SMark Brown case WM8994: 428559e0df6SMark Brown wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); 429559e0df6SMark Brown break; 430559e0df6SMark Brown case WM8958: 431559e0df6SMark Brown wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); 432559e0df6SMark Brown break; 433559e0df6SMark Brown default: 434559e0df6SMark Brown BUG(); 4359db4249fSMark Brown goto err; 436559e0df6SMark Brown } 437559e0df6SMark Brown 4382fa33494SMark Brown wm8994->supplies = devm_kzalloc(wm8994->dev, 4392fa33494SMark Brown sizeof(struct regulator_bulk_data) * 4402fa33494SMark Brown wm8994->num_supplies, GFP_KERNEL); 441fccbd21fSAxel Lin if (!wm8994->supplies) { 442fccbd21fSAxel Lin ret = -ENOMEM; 4439db4249fSMark Brown goto err; 444fccbd21fSAxel Lin } 4459e501086SMark Brown 446559e0df6SMark Brown switch (wm8994->type) { 447b1f43bf3SMark Brown case WM1811: 448b1f43bf3SMark Brown for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) 449b1f43bf3SMark Brown wm8994->supplies[i].supply = wm1811_main_supplies[i]; 450b1f43bf3SMark Brown break; 451559e0df6SMark Brown case WM8994: 4529e501086SMark Brown for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) 4539e501086SMark Brown wm8994->supplies[i].supply = wm8994_main_supplies[i]; 454559e0df6SMark Brown break; 455559e0df6SMark Brown case WM8958: 456559e0df6SMark Brown for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) 457559e0df6SMark Brown wm8994->supplies[i].supply = wm8958_main_supplies[i]; 458559e0df6SMark Brown break; 459559e0df6SMark Brown default: 460559e0df6SMark Brown BUG(); 4619db4249fSMark Brown goto err; 462559e0df6SMark Brown } 4639e501086SMark Brown 464559e0df6SMark Brown ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, 4659e501086SMark Brown wm8994->supplies); 4669e501086SMark Brown if (ret != 0) { 4679e501086SMark Brown dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); 4689db4249fSMark Brown goto err; 4699e501086SMark Brown } 4709e501086SMark Brown 471559e0df6SMark Brown ret = regulator_bulk_enable(wm8994->num_supplies, 4729e501086SMark Brown wm8994->supplies); 4739e501086SMark Brown if (ret != 0) { 4749e501086SMark Brown dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); 4757731074aSJoonyoung Shim goto err_get; 4769e501086SMark Brown } 4779e501086SMark Brown 4789e501086SMark Brown ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); 4799e501086SMark Brown if (ret < 0) { 4809e501086SMark Brown dev_err(wm8994->dev, "Failed to read ID register\n"); 4819e501086SMark Brown goto err_enable; 4829e501086SMark Brown } 483559e0df6SMark Brown switch (ret) { 484b1f43bf3SMark Brown case 0x1811: 485b1f43bf3SMark Brown devname = "WM1811"; 486b1f43bf3SMark Brown if (wm8994->type != WM1811) 487b1f43bf3SMark Brown dev_warn(wm8994->dev, "Device registered as type %d\n", 488b1f43bf3SMark Brown wm8994->type); 489b1f43bf3SMark Brown wm8994->type = WM1811; 490b1f43bf3SMark Brown break; 491559e0df6SMark Brown case 0x8994: 492559e0df6SMark Brown devname = "WM8994"; 493559e0df6SMark Brown if (wm8994->type != WM8994) 494559e0df6SMark Brown dev_warn(wm8994->dev, "Device registered as type %d\n", 495559e0df6SMark Brown wm8994->type); 496559e0df6SMark Brown wm8994->type = WM8994; 497559e0df6SMark Brown break; 498559e0df6SMark Brown case 0x8958: 499559e0df6SMark Brown devname = "WM8958"; 500559e0df6SMark Brown if (wm8994->type != WM8958) 501559e0df6SMark Brown dev_warn(wm8994->dev, "Device registered as type %d\n", 502559e0df6SMark Brown wm8994->type); 503559e0df6SMark Brown wm8994->type = WM8958; 504559e0df6SMark Brown break; 505559e0df6SMark Brown default: 5069e501086SMark Brown dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", 5079e501086SMark Brown ret); 5089e501086SMark Brown ret = -EINVAL; 5099e501086SMark Brown goto err_enable; 5109e501086SMark Brown } 5119e501086SMark Brown 5129e501086SMark Brown ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); 5139e501086SMark Brown if (ret < 0) { 5149e501086SMark Brown dev_err(wm8994->dev, "Failed to read revision register: %d\n", 5159e501086SMark Brown ret); 5169e501086SMark Brown goto err_enable; 5179e501086SMark Brown } 518cc7a7279SMark Brown wm8994->revision = ret & WM8994_CHIP_REV_MASK; 519cc7a7279SMark Brown wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT; 5209e501086SMark Brown 521a2495bc7SMark Brown switch (wm8994->type) { 522a2495bc7SMark Brown case WM8994: 5237ed5849cSMark Brown switch (wm8994->revision) { 5249e501086SMark Brown case 0: 5259e501086SMark Brown case 1: 526559e0df6SMark Brown dev_warn(wm8994->dev, 527559e0df6SMark Brown "revision %c not fully supported\n", 5287ed5849cSMark Brown 'A' + wm8994->revision); 5299e501086SMark Brown break; 530462835e4SMark Brown case 2: 531462835e4SMark Brown case 3: 532462835e4SMark Brown regmap_patch = wm8994_revc_patch; 533462835e4SMark Brown patch_regs = ARRAY_SIZE(wm8994_revc_patch); 534462835e4SMark Brown break; 5359e501086SMark Brown default: 5369e501086SMark Brown break; 5379e501086SMark Brown } 538a2495bc7SMark Brown break; 539462835e4SMark Brown 540462835e4SMark Brown case WM8958: 541462835e4SMark Brown switch (wm8994->revision) { 542462835e4SMark Brown case 0: 543462835e4SMark Brown regmap_patch = wm8958_reva_patch; 544462835e4SMark Brown patch_regs = ARRAY_SIZE(wm8958_reva_patch); 545462835e4SMark Brown break; 546462835e4SMark Brown default: 547462835e4SMark Brown break; 548462835e4SMark Brown } 549462835e4SMark Brown break; 550462835e4SMark Brown 551443e67edSMark Brown case WM1811: 552443e67edSMark Brown /* Revision C did not change the relevant layer */ 5537ed5849cSMark Brown if (wm8994->revision > 1) 5547ed5849cSMark Brown wm8994->revision++; 555462835e4SMark Brown switch (wm8994->revision) { 556462835e4SMark Brown case 0: 557462835e4SMark Brown case 1: 558a0cc0209SMark Brown case 2: 559a0cc0209SMark Brown case 3: 560462835e4SMark Brown regmap_patch = wm1811_reva_patch; 561462835e4SMark Brown patch_regs = ARRAY_SIZE(wm1811_reva_patch); 562443e67edSMark Brown break; 563a2495bc7SMark Brown default: 564a2495bc7SMark Brown break; 565a2495bc7SMark Brown } 566462835e4SMark Brown break; 567462835e4SMark Brown 568462835e4SMark Brown default: 569462835e4SMark Brown break; 570462835e4SMark Brown } 5719e501086SMark Brown 572cc7a7279SMark Brown dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname, 573cc7a7279SMark Brown 'A' + wm8994->revision, wm8994->cust_id); 5749e501086SMark Brown 57534697898SMark Brown switch (wm8994->type) { 57634697898SMark Brown case WM1811: 57734697898SMark Brown regmap_config = &wm1811_regmap_config; 57834697898SMark Brown break; 57934697898SMark Brown case WM8994: 58034697898SMark Brown regmap_config = &wm8994_regmap_config; 58134697898SMark Brown break; 58234697898SMark Brown case WM8958: 58334697898SMark Brown regmap_config = &wm8958_regmap_config; 58434697898SMark Brown break; 58534697898SMark Brown default: 58634697898SMark Brown dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type); 58734697898SMark Brown return -EINVAL; 58834697898SMark Brown } 58934697898SMark Brown 59034697898SMark Brown ret = regmap_reinit_cache(wm8994->regmap, regmap_config); 59134697898SMark Brown if (ret != 0) { 59234697898SMark Brown dev_err(wm8994->dev, "Failed to reinit register cache: %d\n", 59334697898SMark Brown ret); 59434697898SMark Brown return ret; 59534697898SMark Brown } 5969e501086SMark Brown 597462835e4SMark Brown if (regmap_patch) { 598462835e4SMark Brown ret = regmap_register_patch(wm8994->regmap, regmap_patch, 599462835e4SMark Brown patch_regs); 600462835e4SMark Brown if (ret != 0) { 601462835e4SMark Brown dev_err(wm8994->dev, "Failed to register patch: %d\n", 602462835e4SMark Brown ret); 6039db4249fSMark Brown goto err; 604462835e4SMark Brown } 605462835e4SMark Brown } 606462835e4SMark Brown 6079e501086SMark Brown if (pdata) { 608c9fbf7e0SMark Brown wm8994->irq_base = pdata->irq_base; 6099e501086SMark Brown wm8994->gpio_base = pdata->gpio_base; 6109e501086SMark Brown 6119e501086SMark Brown /* GPIO configuration is only applied if it's non-zero */ 6129e501086SMark Brown for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 6139e501086SMark Brown if (pdata->gpio_defaults[i]) { 6149e501086SMark Brown wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, 6159e501086SMark Brown 0xffff, 6169e501086SMark Brown pdata->gpio_defaults[i]); 6179e501086SMark Brown } 6189e501086SMark Brown } 619881de670SMark Brown 620881de670SMark Brown wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; 62126c34c25SMark Brown 62226c34c25SMark Brown if (pdata->spkmode_pu) 62326c34c25SMark Brown pulls |= WM8994_SPKMODE_PU; 6249e501086SMark Brown } 6259e501086SMark Brown 62626c34c25SMark Brown /* Disable unneeded pulls */ 627881de670SMark Brown wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 62826c34c25SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | 62926c34c25SMark Brown WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, 63026c34c25SMark Brown pulls); 631881de670SMark Brown 6329e501086SMark Brown /* In some system designs where the regulators are not in use, 6339e501086SMark Brown * we can achieve a small reduction in leakage currents by 6349e501086SMark Brown * floating LDO outputs. This bit makes no difference if the 6359e501086SMark Brown * LDOs are enabled, it only affects cases where the LDOs were 6369e501086SMark Brown * in operation and are then disabled. 6379e501086SMark Brown */ 6389e501086SMark Brown for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { 6399e501086SMark Brown if (wm8994_ldo_in_use(pdata, i)) 6409e501086SMark Brown wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 6419e501086SMark Brown WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); 6429e501086SMark Brown else 6439e501086SMark Brown wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 6449e501086SMark Brown WM8994_LDO1_DISCH, 0); 6459e501086SMark Brown } 6469e501086SMark Brown 647c9fbf7e0SMark Brown wm8994_irq_init(wm8994); 648c9fbf7e0SMark Brown 6499e501086SMark Brown ret = mfd_add_devices(wm8994->dev, -1, 6509e501086SMark Brown wm8994_devs, ARRAY_SIZE(wm8994_devs), 65155692af5SMark Brown NULL, 0, NULL); 6529e501086SMark Brown if (ret != 0) { 6539e501086SMark Brown dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 654c9fbf7e0SMark Brown goto err_irq; 6559e501086SMark Brown } 6569e501086SMark Brown 657d450f19eSMark Brown pm_runtime_enable(wm8994->dev); 658ee67b0cdSMark Brown pm_runtime_idle(wm8994->dev); 659d450f19eSMark Brown 6609e501086SMark Brown return 0; 6619e501086SMark Brown 662c9fbf7e0SMark Brown err_irq: 663c9fbf7e0SMark Brown wm8994_irq_exit(wm8994); 6649e501086SMark Brown err_enable: 665559e0df6SMark Brown regulator_bulk_disable(wm8994->num_supplies, 6669e501086SMark Brown wm8994->supplies); 6679e501086SMark Brown err_get: 668559e0df6SMark Brown regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 6699db4249fSMark Brown err: 6709e501086SMark Brown mfd_remove_devices(wm8994->dev); 6719e501086SMark Brown return ret; 6729e501086SMark Brown } 6739e501086SMark Brown 6744740f73fSBill Pemberton static void wm8994_device_exit(struct wm8994 *wm8994) 6759e501086SMark Brown { 676d450f19eSMark Brown pm_runtime_disable(wm8994->dev); 6779e501086SMark Brown mfd_remove_devices(wm8994->dev); 678c9fbf7e0SMark Brown wm8994_irq_exit(wm8994); 679559e0df6SMark Brown regulator_bulk_disable(wm8994->num_supplies, 6809e501086SMark Brown wm8994->supplies); 681559e0df6SMark Brown regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 6829e501086SMark Brown } 6839e501086SMark Brown 684cf763c2eSMark Brown static const struct of_device_id wm8994_of_match[] = { 685cf763c2eSMark Brown { .compatible = "wlf,wm1811", }, 686cf763c2eSMark Brown { .compatible = "wlf,wm8994", }, 687cf763c2eSMark Brown { .compatible = "wlf,wm8958", }, 688cf763c2eSMark Brown { } 689cf763c2eSMark Brown }; 690cf763c2eSMark Brown MODULE_DEVICE_TABLE(of, wm8994_of_match); 691cf763c2eSMark Brown 692f791be49SBill Pemberton static int wm8994_i2c_probe(struct i2c_client *i2c, 6939e501086SMark Brown const struct i2c_device_id *id) 6949e501086SMark Brown { 6959e501086SMark Brown struct wm8994 *wm8994; 696d6c645fcSMark Brown int ret; 6979e501086SMark Brown 6982fa33494SMark Brown wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL); 699d0a11693SAxel Lin if (wm8994 == NULL) 7009e501086SMark Brown return -ENOMEM; 7019e501086SMark Brown 7029e501086SMark Brown i2c_set_clientdata(i2c, wm8994); 7039e501086SMark Brown wm8994->dev = &i2c->dev; 704c9fbf7e0SMark Brown wm8994->irq = i2c->irq; 705559e0df6SMark Brown wm8994->type = id->driver_data; 7069e501086SMark Brown 7079db4249fSMark Brown wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config); 708d6c645fcSMark Brown if (IS_ERR(wm8994->regmap)) { 709d6c645fcSMark Brown ret = PTR_ERR(wm8994->regmap); 710d6c645fcSMark Brown dev_err(wm8994->dev, "Failed to allocate register map: %d\n", 711d6c645fcSMark Brown ret); 712d6c645fcSMark Brown return ret; 713d6c645fcSMark Brown } 714d6c645fcSMark Brown 715559e0df6SMark Brown return wm8994_device_init(wm8994, i2c->irq); 7169e501086SMark Brown } 7179e501086SMark Brown 7184740f73fSBill Pemberton static int wm8994_i2c_remove(struct i2c_client *i2c) 7199e501086SMark Brown { 7209e501086SMark Brown struct wm8994 *wm8994 = i2c_get_clientdata(i2c); 7219e501086SMark Brown 7229e501086SMark Brown wm8994_device_exit(wm8994); 7239e501086SMark Brown 7249e501086SMark Brown return 0; 7259e501086SMark Brown } 7269e501086SMark Brown 7279e501086SMark Brown static const struct i2c_device_id wm8994_i2c_id[] = { 728b1f43bf3SMark Brown { "wm1811", WM1811 }, 72971d17184SMark Brown { "wm1811a", WM1811 }, 730559e0df6SMark Brown { "wm8994", WM8994 }, 731559e0df6SMark Brown { "wm8958", WM8958 }, 7329e501086SMark Brown { } 7339e501086SMark Brown }; 7349e501086SMark Brown MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); 7359e501086SMark Brown 736aad34310SMark Brown static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, 737aad34310SMark Brown NULL); 738d450f19eSMark Brown 7399e501086SMark Brown static struct i2c_driver wm8994_i2c_driver = { 7409e501086SMark Brown .driver = { 7419e501086SMark Brown .name = "wm8994", 7429e501086SMark Brown .owner = THIS_MODULE, 743d450f19eSMark Brown .pm = &wm8994_pm_ops, 744cf763c2eSMark Brown .of_match_table = wm8994_of_match, 7459e501086SMark Brown }, 7469e501086SMark Brown .probe = wm8994_i2c_probe, 74784449216SBill Pemberton .remove = wm8994_i2c_remove, 7489e501086SMark Brown .id_table = wm8994_i2c_id, 7499e501086SMark Brown }; 7509e501086SMark Brown 751ceb57d27SMark Brown module_i2c_driver(wm8994_i2c_driver); 7529e501086SMark Brown 7539e501086SMark Brown MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); 7549e501086SMark Brown MODULE_LICENSE("GPL"); 7559e501086SMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 756