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> 2220fb2772SMark Brown #include <linux/of.h> 2320fb2772SMark Brown #include <linux/of_device.h> 2420fb2772SMark Brown #include <linux/of_gpio.h> 25d450f19eSMark Brown #include <linux/pm_runtime.h> 26d6c645fcSMark Brown #include <linux/regmap.h> 279e501086SMark Brown #include <linux/regulator/consumer.h> 289e501086SMark Brown #include <linux/regulator/machine.h> 299e501086SMark Brown 309e501086SMark Brown #include <linux/mfd/wm8994/core.h> 319e501086SMark Brown #include <linux/mfd/wm8994/pdata.h> 329e501086SMark Brown #include <linux/mfd/wm8994/registers.h> 339e501086SMark Brown 34c3f13861SMark Brown #include "wm8994.h" 359e501086SMark Brown 36ad59de48SGeert Uytterhoeven static const struct mfd_cell wm8994_regulator_devs[] = { 37d450f19eSMark Brown { 38d450f19eSMark Brown .name = "wm8994-ldo", 39fef22cb4SInha Song .id = 0, 40d450f19eSMark Brown .pm_runtime_no_callbacks = true, 41d450f19eSMark Brown }, 42d450f19eSMark Brown { 43d450f19eSMark Brown .name = "wm8994-ldo", 44fef22cb4SInha Song .id = 1, 45d450f19eSMark Brown .pm_runtime_no_callbacks = true, 46d450f19eSMark Brown }, 479e501086SMark Brown }; 489e501086SMark Brown 49c9fbf7e0SMark Brown static struct resource wm8994_codec_resources[] = { 50c9fbf7e0SMark Brown { 51c9fbf7e0SMark Brown .start = WM8994_IRQ_TEMP_SHUT, 52c9fbf7e0SMark Brown .end = WM8994_IRQ_TEMP_WARN, 53c9fbf7e0SMark Brown .flags = IORESOURCE_IRQ, 54c9fbf7e0SMark Brown }, 55c9fbf7e0SMark Brown }; 56c9fbf7e0SMark Brown 57c9fbf7e0SMark Brown static struct resource wm8994_gpio_resources[] = { 58c9fbf7e0SMark Brown { 59c9fbf7e0SMark Brown .start = WM8994_IRQ_GPIO(1), 60c9fbf7e0SMark Brown .end = WM8994_IRQ_GPIO(11), 61c9fbf7e0SMark Brown .flags = IORESOURCE_IRQ, 62c9fbf7e0SMark Brown }, 63c9fbf7e0SMark Brown }; 64c9fbf7e0SMark Brown 65ad59de48SGeert Uytterhoeven static const struct mfd_cell wm8994_devs[] = { 66c9fbf7e0SMark Brown { 67c9fbf7e0SMark Brown .name = "wm8994-codec", 68c9fbf7e0SMark Brown .num_resources = ARRAY_SIZE(wm8994_codec_resources), 69c9fbf7e0SMark Brown .resources = wm8994_codec_resources, 70c9fbf7e0SMark Brown }, 71c9fbf7e0SMark Brown 72c9fbf7e0SMark Brown { 73c9fbf7e0SMark Brown .name = "wm8994-gpio", 74c9fbf7e0SMark Brown .num_resources = ARRAY_SIZE(wm8994_gpio_resources), 75c9fbf7e0SMark Brown .resources = wm8994_gpio_resources, 76d450f19eSMark Brown .pm_runtime_no_callbacks = true, 77c9fbf7e0SMark Brown }, 789e501086SMark Brown }; 799e501086SMark Brown 809e501086SMark Brown /* 819e501086SMark Brown * Supplies for the main bulk of CODEC; the LDO supplies are ignored 829e501086SMark Brown * and should be handled via the standard regulator API supply 839e501086SMark Brown * management. 849e501086SMark Brown */ 85b1f43bf3SMark Brown static const char *wm1811_main_supplies[] = { 86b1f43bf3SMark Brown "DBVDD1", 87b1f43bf3SMark Brown "DBVDD2", 88b1f43bf3SMark Brown "DBVDD3", 89b1f43bf3SMark Brown "DCVDD", 90b1f43bf3SMark Brown "AVDD1", 91b1f43bf3SMark Brown "AVDD2", 92b1f43bf3SMark Brown "CPVDD", 93b1f43bf3SMark Brown "SPKVDD1", 94b1f43bf3SMark Brown "SPKVDD2", 95b1f43bf3SMark Brown }; 96b1f43bf3SMark Brown 979e501086SMark Brown static const char *wm8994_main_supplies[] = { 989e501086SMark Brown "DBVDD", 999e501086SMark Brown "DCVDD", 1009e501086SMark Brown "AVDD1", 1019e501086SMark Brown "AVDD2", 1029e501086SMark Brown "CPVDD", 1039e501086SMark Brown "SPKVDD1", 1049e501086SMark Brown "SPKVDD2", 1059e501086SMark Brown }; 1069e501086SMark Brown 107559e0df6SMark Brown static const char *wm8958_main_supplies[] = { 108559e0df6SMark Brown "DBVDD1", 109559e0df6SMark Brown "DBVDD2", 110559e0df6SMark Brown "DBVDD3", 111559e0df6SMark Brown "DCVDD", 112559e0df6SMark Brown "AVDD1", 113559e0df6SMark Brown "AVDD2", 114559e0df6SMark Brown "CPVDD", 115559e0df6SMark Brown "SPKVDD1", 116559e0df6SMark Brown "SPKVDD2", 117559e0df6SMark Brown }; 118559e0df6SMark Brown 11948bb9fe4SRafael J. Wysocki #ifdef CONFIG_PM 120d450f19eSMark Brown static int wm8994_suspend(struct device *dev) 1219e501086SMark Brown { 1229e501086SMark Brown struct wm8994 *wm8994 = dev_get_drvdata(dev); 1239e501086SMark Brown int ret; 1249e501086SMark Brown 12577bd70e9SMark Brown /* Don't actually go through with the suspend if the CODEC is 126ebe38f80SMark Brown * still active for accessory detect. */ 1275f40c6b6SMark Brown switch (wm8994->type) { 1285f40c6b6SMark Brown case WM8958: 129b5488b6eSMark Brown case WM1811: 1305f40c6b6SMark Brown ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1); 1315f40c6b6SMark Brown if (ret < 0) { 1325f40c6b6SMark Brown dev_err(dev, "Failed to read power status: %d\n", ret); 1335f40c6b6SMark Brown } else if (ret & WM8958_MICD_ENA) { 1345f40c6b6SMark Brown dev_dbg(dev, "CODEC still active, ignoring suspend\n"); 1355f40c6b6SMark Brown return 0; 1365f40c6b6SMark Brown } 1375f40c6b6SMark Brown break; 1385f40c6b6SMark Brown default: 1395f40c6b6SMark Brown break; 1405f40c6b6SMark Brown } 1415f40c6b6SMark Brown 142881de670SMark Brown /* Disable LDO pulldowns while the device is suspended if we 143881de670SMark Brown * don't know that something will be driving them. */ 144881de670SMark Brown if (!wm8994->ldo_ena_always_driven) 145881de670SMark Brown wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 146881de670SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 147881de670SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD); 148881de670SMark Brown 149f40dff9eSMark Brown /* Explicitly put the device into reset in case regulators 150f40dff9eSMark Brown * don't get disabled in order to ensure consistent restart. 151f40dff9eSMark Brown */ 152be79cf2fSMark Brown wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 153be79cf2fSMark Brown wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); 154f40dff9eSMark Brown 155ed393dcdSMark Brown regcache_mark_dirty(wm8994->regmap); 156ed393dcdSMark Brown 15778a27cd3SChris Rattray /* Restore GPIO registers to prevent problems with mismatched 15878a27cd3SChris Rattray * pin configurations. 15978a27cd3SChris Rattray */ 160ed393dcdSMark Brown ret = regcache_sync_region(wm8994->regmap, WM8994_GPIO_1, 161ed393dcdSMark Brown WM8994_GPIO_11); 16278a27cd3SChris Rattray if (ret != 0) 16378a27cd3SChris Rattray dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); 16478a27cd3SChris Rattray 1651a2017b7SMark Brown /* In case one of the GPIOs is used as a wake input. */ 1661a2017b7SMark Brown ret = regcache_sync_region(wm8994->regmap, 1671a2017b7SMark Brown WM8994_INTERRUPT_STATUS_1_MASK, 1681a2017b7SMark Brown WM8994_INTERRUPT_STATUS_1_MASK); 1691a2017b7SMark Brown if (ret != 0) 1701a2017b7SMark Brown dev_err(dev, "Failed to restore interrupt mask: %d\n", ret); 1711a2017b7SMark Brown 1723befc925SMark Brown regcache_cache_only(wm8994->regmap, true); 17377bd70e9SMark Brown wm8994->suspended = true; 17477bd70e9SMark Brown 175559e0df6SMark Brown ret = regulator_bulk_disable(wm8994->num_supplies, 1769e501086SMark Brown wm8994->supplies); 1779e501086SMark Brown if (ret != 0) { 1789e501086SMark Brown dev_err(dev, "Failed to disable supplies: %d\n", ret); 1799e501086SMark Brown return ret; 1809e501086SMark Brown } 1819e501086SMark Brown 1829e501086SMark Brown return 0; 1839e501086SMark Brown } 1849e501086SMark Brown 185d450f19eSMark Brown static int wm8994_resume(struct device *dev) 1869e501086SMark Brown { 1879e501086SMark Brown struct wm8994 *wm8994 = dev_get_drvdata(dev); 188c3f13861SMark Brown int ret; 1899e501086SMark Brown 19077bd70e9SMark Brown /* We may have lied to the PM core about suspending */ 19177bd70e9SMark Brown if (!wm8994->suspended) 19277bd70e9SMark Brown return 0; 19377bd70e9SMark Brown 194559e0df6SMark Brown ret = regulator_bulk_enable(wm8994->num_supplies, 1959e501086SMark Brown wm8994->supplies); 1969e501086SMark Brown if (ret != 0) { 1979e501086SMark Brown dev_err(dev, "Failed to enable supplies: %d\n", ret); 1989e501086SMark Brown return ret; 1999e501086SMark Brown } 2009e501086SMark Brown 2013befc925SMark Brown regcache_cache_only(wm8994->regmap, false); 202c3f13861SMark Brown ret = regcache_sync(wm8994->regmap); 203c3f13861SMark Brown if (ret != 0) { 204c3f13861SMark Brown dev_err(dev, "Failed to restore register map: %d\n", ret); 205c3f13861SMark Brown goto err_enable; 20698ae1ccaSMark Brown } 207c9fbf7e0SMark Brown 208881de670SMark Brown /* Disable LDO pulldowns while the device is active */ 209881de670SMark Brown wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 210881de670SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, 211881de670SMark Brown 0); 212881de670SMark Brown 21377bd70e9SMark Brown wm8994->suspended = false; 21477bd70e9SMark Brown 2159e501086SMark Brown return 0; 216c3f13861SMark Brown 217c3f13861SMark Brown err_enable: 218c3f13861SMark Brown regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies); 219c3f13861SMark Brown 220c3f13861SMark Brown return ret; 2219e501086SMark Brown } 2229e501086SMark Brown #endif 2239e501086SMark Brown 2249e501086SMark Brown #ifdef CONFIG_REGULATOR 2259e501086SMark Brown static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 2269e501086SMark Brown { 2279e501086SMark Brown struct wm8994_ldo_pdata *ldo_pdata; 2289e501086SMark Brown 2299e501086SMark Brown if (!pdata) 2309e501086SMark Brown return 0; 2319e501086SMark Brown 2329e501086SMark Brown ldo_pdata = &pdata->ldo[ldo]; 2339e501086SMark Brown 2349e501086SMark Brown if (!ldo_pdata->init_data) 2359e501086SMark Brown return 0; 2369e501086SMark Brown 2379e501086SMark Brown return ldo_pdata->init_data->num_consumer_supplies != 0; 2389e501086SMark Brown } 2399e501086SMark Brown #else 2409e501086SMark Brown static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) 2419e501086SMark Brown { 2429e501086SMark Brown return 0; 2439e501086SMark Brown } 2449e501086SMark Brown #endif 2459e501086SMark Brown 2468019ff6cSNariman Poushin static const struct reg_sequence wm8994_revc_patch[] = { 247462835e4SMark Brown { 0x102, 0x3 }, 248462835e4SMark Brown { 0x56, 0x3 }, 249462835e4SMark Brown { 0x817, 0x0 }, 250462835e4SMark Brown { 0x102, 0x0 }, 251462835e4SMark Brown }; 252462835e4SMark Brown 2538019ff6cSNariman Poushin static const struct reg_sequence wm8958_reva_patch[] = { 254462835e4SMark Brown { 0x102, 0x3 }, 255462835e4SMark Brown { 0xcb, 0x81 }, 256462835e4SMark Brown { 0x817, 0x0 }, 257462835e4SMark Brown { 0x102, 0x0 }, 258462835e4SMark Brown }; 259462835e4SMark Brown 2608019ff6cSNariman Poushin static const struct reg_sequence wm1811_reva_patch[] = { 261462835e4SMark Brown { 0x102, 0x3 }, 2629282a7b9SMark Brown { 0x56, 0xc07 }, 263462835e4SMark Brown { 0x5d, 0x7e }, 264462835e4SMark Brown { 0x5e, 0x0 }, 265462835e4SMark Brown { 0x102, 0x0 }, 266462835e4SMark Brown }; 267462835e4SMark Brown 26820fb2772SMark Brown #ifdef CONFIG_OF 26920fb2772SMark Brown static int wm8994_set_pdata_from_of(struct wm8994 *wm8994) 27020fb2772SMark Brown { 27120fb2772SMark Brown struct device_node *np = wm8994->dev->of_node; 27220fb2772SMark Brown struct wm8994_pdata *pdata = &wm8994->pdata; 27320fb2772SMark Brown int i; 27420fb2772SMark Brown 27520fb2772SMark Brown if (!np) 27620fb2772SMark Brown return 0; 27720fb2772SMark Brown 27820fb2772SMark Brown if (of_property_read_u32_array(np, "wlf,gpio-cfg", pdata->gpio_defaults, 27920fb2772SMark Brown ARRAY_SIZE(pdata->gpio_defaults)) >= 0) { 28020fb2772SMark Brown for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 28120fb2772SMark Brown if (wm8994->pdata.gpio_defaults[i] == 0) 28220fb2772SMark Brown pdata->gpio_defaults[i] 28320fb2772SMark Brown = WM8994_CONFIGURE_GPIO; 28420fb2772SMark Brown } 28520fb2772SMark Brown } 28620fb2772SMark Brown 28720fb2772SMark Brown of_property_read_u32_array(np, "wlf,micbias-cfg", pdata->micbias, 28820fb2772SMark Brown ARRAY_SIZE(pdata->micbias)); 28920fb2772SMark Brown 29020fb2772SMark Brown pdata->lineout1_diff = true; 29120fb2772SMark Brown pdata->lineout2_diff = true; 29220fb2772SMark Brown if (of_find_property(np, "wlf,lineout1-se", NULL)) 29320fb2772SMark Brown pdata->lineout1_diff = false; 29420fb2772SMark Brown if (of_find_property(np, "wlf,lineout2-se", NULL)) 29520fb2772SMark Brown pdata->lineout2_diff = false; 29620fb2772SMark Brown 29720fb2772SMark Brown if (of_find_property(np, "wlf,lineout1-feedback", NULL)) 29820fb2772SMark Brown pdata->lineout1fb = true; 29920fb2772SMark Brown if (of_find_property(np, "wlf,lineout2-feedback", NULL)) 30020fb2772SMark Brown pdata->lineout2fb = true; 30120fb2772SMark Brown 30220fb2772SMark Brown if (of_find_property(np, "wlf,ldoena-always-driven", NULL)) 30320fb2772SMark Brown pdata->lineout2fb = true; 30420fb2772SMark Brown 30520fb2772SMark Brown pdata->ldo[0].enable = of_get_named_gpio(np, "wlf,ldo1ena", 0); 30620fb2772SMark Brown if (pdata->ldo[0].enable < 0) 30720fb2772SMark Brown pdata->ldo[0].enable = 0; 30820fb2772SMark Brown 30920fb2772SMark Brown pdata->ldo[1].enable = of_get_named_gpio(np, "wlf,ldo2ena", 0); 31020fb2772SMark Brown if (pdata->ldo[1].enable < 0) 31120fb2772SMark Brown pdata->ldo[1].enable = 0; 31220fb2772SMark Brown 31320fb2772SMark Brown return 0; 31420fb2772SMark Brown } 31520fb2772SMark Brown #else 31620fb2772SMark Brown static int wm8994_set_pdata_from_of(struct wm8994 *wm8994) 31720fb2772SMark Brown { 31820fb2772SMark Brown return 0; 31920fb2772SMark Brown } 32020fb2772SMark Brown #endif 32120fb2772SMark Brown 3229e501086SMark Brown /* 3239e501086SMark Brown * Instantiate the generic non-control parts of the device. 3249e501086SMark Brown */ 325f791be49SBill Pemberton static int wm8994_device_init(struct wm8994 *wm8994, int irq) 3269e501086SMark Brown { 327a8a8fc28SMark Brown struct wm8994_pdata *pdata; 32834697898SMark Brown struct regmap_config *regmap_config; 3298019ff6cSNariman Poushin const struct reg_sequence *regmap_patch = NULL; 330559e0df6SMark Brown const char *devname; 331222bc784SJingoo Han int ret, i, patch_regs = 0; 33226c34c25SMark Brown int pulls = 0; 3339e501086SMark Brown 334a8a8fc28SMark Brown if (dev_get_platdata(wm8994->dev)) { 335a8a8fc28SMark Brown pdata = dev_get_platdata(wm8994->dev); 336a8a8fc28SMark Brown wm8994->pdata = *pdata; 337a8a8fc28SMark Brown } 338a8a8fc28SMark Brown pdata = &wm8994->pdata; 339a8a8fc28SMark Brown 34020fb2772SMark Brown ret = wm8994_set_pdata_from_of(wm8994); 34120fb2772SMark Brown if (ret != 0) 34220fb2772SMark Brown return ret; 34320fb2772SMark Brown 3449e501086SMark Brown dev_set_drvdata(wm8994->dev, wm8994); 3459e501086SMark Brown 3469e501086SMark Brown /* Add the on-chip regulators first for bootstrapping */ 347fef22cb4SInha Song ret = mfd_add_devices(wm8994->dev, 0, 3489e501086SMark Brown wm8994_regulator_devs, 3499e501086SMark Brown ARRAY_SIZE(wm8994_regulator_devs), 35055692af5SMark Brown NULL, 0, NULL); 3519e501086SMark Brown if (ret != 0) { 3529e501086SMark Brown dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 3539db4249fSMark Brown goto err; 3549e501086SMark Brown } 3559e501086SMark Brown 356559e0df6SMark Brown switch (wm8994->type) { 357b1f43bf3SMark Brown case WM1811: 358b1f43bf3SMark Brown wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); 359b1f43bf3SMark Brown break; 360559e0df6SMark Brown case WM8994: 361559e0df6SMark Brown wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); 362559e0df6SMark Brown break; 363559e0df6SMark Brown case WM8958: 364559e0df6SMark Brown wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); 365559e0df6SMark Brown break; 366559e0df6SMark Brown default: 367559e0df6SMark Brown BUG(); 3689db4249fSMark Brown goto err; 369559e0df6SMark Brown } 370559e0df6SMark Brown 3712fa33494SMark Brown wm8994->supplies = devm_kzalloc(wm8994->dev, 3722fa33494SMark Brown sizeof(struct regulator_bulk_data) * 3732fa33494SMark Brown wm8994->num_supplies, GFP_KERNEL); 374fccbd21fSAxel Lin if (!wm8994->supplies) { 375fccbd21fSAxel Lin ret = -ENOMEM; 3769db4249fSMark Brown goto err; 377fccbd21fSAxel Lin } 3789e501086SMark Brown 379559e0df6SMark Brown switch (wm8994->type) { 380b1f43bf3SMark Brown case WM1811: 381b1f43bf3SMark Brown for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) 382b1f43bf3SMark Brown wm8994->supplies[i].supply = wm1811_main_supplies[i]; 383b1f43bf3SMark Brown break; 384559e0df6SMark Brown case WM8994: 3859e501086SMark Brown for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) 3869e501086SMark Brown wm8994->supplies[i].supply = wm8994_main_supplies[i]; 387559e0df6SMark Brown break; 388559e0df6SMark Brown case WM8958: 389559e0df6SMark Brown for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) 390559e0df6SMark Brown wm8994->supplies[i].supply = wm8958_main_supplies[i]; 391559e0df6SMark Brown break; 392559e0df6SMark Brown default: 393559e0df6SMark Brown BUG(); 3949db4249fSMark Brown goto err; 395559e0df6SMark Brown } 3969e501086SMark Brown 397202b5689SViresh Kumar /* 398202b5689SViresh Kumar * Can't use devres helper here as some of the supplies are provided by 399202b5689SViresh Kumar * wm8994->dev's children (regulators) and those regulators are 400202b5689SViresh Kumar * unregistered by the devres core before the supplies are freed. 401202b5689SViresh Kumar */ 402202b5689SViresh Kumar ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, 4039e501086SMark Brown wm8994->supplies); 4049e501086SMark Brown if (ret != 0) { 4059e501086SMark Brown dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); 4069db4249fSMark Brown goto err; 4079e501086SMark Brown } 4089e501086SMark Brown 4093e56c468SViresh Kumar ret = regulator_bulk_enable(wm8994->num_supplies, wm8994->supplies); 4109e501086SMark Brown if (ret != 0) { 4119e501086SMark Brown dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); 412202b5689SViresh Kumar goto err_regulator_free; 4139e501086SMark Brown } 4149e501086SMark Brown 4159e501086SMark Brown ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); 4169e501086SMark Brown if (ret < 0) { 4179e501086SMark Brown dev_err(wm8994->dev, "Failed to read ID register\n"); 4189e501086SMark Brown goto err_enable; 4199e501086SMark Brown } 420559e0df6SMark Brown switch (ret) { 421b1f43bf3SMark Brown case 0x1811: 422b1f43bf3SMark Brown devname = "WM1811"; 423b1f43bf3SMark Brown if (wm8994->type != WM1811) 424b1f43bf3SMark Brown dev_warn(wm8994->dev, "Device registered as type %d\n", 425b1f43bf3SMark Brown wm8994->type); 426b1f43bf3SMark Brown wm8994->type = WM1811; 427b1f43bf3SMark Brown break; 428559e0df6SMark Brown case 0x8994: 429559e0df6SMark Brown devname = "WM8994"; 430559e0df6SMark Brown if (wm8994->type != WM8994) 431559e0df6SMark Brown dev_warn(wm8994->dev, "Device registered as type %d\n", 432559e0df6SMark Brown wm8994->type); 433559e0df6SMark Brown wm8994->type = WM8994; 434559e0df6SMark Brown break; 435559e0df6SMark Brown case 0x8958: 436559e0df6SMark Brown devname = "WM8958"; 437559e0df6SMark Brown if (wm8994->type != WM8958) 438559e0df6SMark Brown dev_warn(wm8994->dev, "Device registered as type %d\n", 439559e0df6SMark Brown wm8994->type); 440559e0df6SMark Brown wm8994->type = WM8958; 441559e0df6SMark Brown break; 442559e0df6SMark Brown default: 4439e501086SMark Brown dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", 4449e501086SMark Brown ret); 4459e501086SMark Brown ret = -EINVAL; 4469e501086SMark Brown goto err_enable; 4479e501086SMark Brown } 4489e501086SMark Brown 4499e501086SMark Brown ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); 4509e501086SMark Brown if (ret < 0) { 4519e501086SMark Brown dev_err(wm8994->dev, "Failed to read revision register: %d\n", 4529e501086SMark Brown ret); 4539e501086SMark Brown goto err_enable; 4549e501086SMark Brown } 455cc7a7279SMark Brown wm8994->revision = ret & WM8994_CHIP_REV_MASK; 456cc7a7279SMark Brown wm8994->cust_id = (ret & WM8994_CUST_ID_MASK) >> WM8994_CUST_ID_SHIFT; 4579e501086SMark Brown 458a2495bc7SMark Brown switch (wm8994->type) { 459a2495bc7SMark Brown case WM8994: 4607ed5849cSMark Brown switch (wm8994->revision) { 4619e501086SMark Brown case 0: 4629e501086SMark Brown case 1: 463559e0df6SMark Brown dev_warn(wm8994->dev, 464559e0df6SMark Brown "revision %c not fully supported\n", 4657ed5849cSMark Brown 'A' + wm8994->revision); 4669e501086SMark Brown break; 467462835e4SMark Brown case 2: 468462835e4SMark Brown case 3: 469d54e17f9SMark Brown default: 470462835e4SMark Brown regmap_patch = wm8994_revc_patch; 471462835e4SMark Brown patch_regs = ARRAY_SIZE(wm8994_revc_patch); 472462835e4SMark Brown break; 4739e501086SMark Brown } 474a2495bc7SMark Brown break; 475462835e4SMark Brown 476462835e4SMark Brown case WM8958: 477462835e4SMark Brown switch (wm8994->revision) { 478462835e4SMark Brown case 0: 479462835e4SMark Brown regmap_patch = wm8958_reva_patch; 480462835e4SMark Brown patch_regs = ARRAY_SIZE(wm8958_reva_patch); 481462835e4SMark Brown break; 482462835e4SMark Brown default: 483462835e4SMark Brown break; 484462835e4SMark Brown } 485462835e4SMark Brown break; 486462835e4SMark Brown 487443e67edSMark Brown case WM1811: 488443e67edSMark Brown /* Revision C did not change the relevant layer */ 4897ed5849cSMark Brown if (wm8994->revision > 1) 4907ed5849cSMark Brown wm8994->revision++; 491d54e17f9SMark Brown 492462835e4SMark Brown regmap_patch = wm1811_reva_patch; 493462835e4SMark Brown patch_regs = ARRAY_SIZE(wm1811_reva_patch); 494443e67edSMark Brown break; 495462835e4SMark Brown 496462835e4SMark Brown default: 497462835e4SMark Brown break; 498462835e4SMark Brown } 4999e501086SMark Brown 500cc7a7279SMark Brown dev_info(wm8994->dev, "%s revision %c CUST_ID %02x\n", devname, 501cc7a7279SMark Brown 'A' + wm8994->revision, wm8994->cust_id); 5029e501086SMark Brown 50334697898SMark Brown switch (wm8994->type) { 50434697898SMark Brown case WM1811: 50534697898SMark Brown regmap_config = &wm1811_regmap_config; 50634697898SMark Brown break; 50734697898SMark Brown case WM8994: 50834697898SMark Brown regmap_config = &wm8994_regmap_config; 50934697898SMark Brown break; 51034697898SMark Brown case WM8958: 51134697898SMark Brown regmap_config = &wm8958_regmap_config; 51234697898SMark Brown break; 51334697898SMark Brown default: 51434697898SMark Brown dev_err(wm8994->dev, "Unknown device type %d\n", wm8994->type); 51534697898SMark Brown return -EINVAL; 51634697898SMark Brown } 51734697898SMark Brown 51834697898SMark Brown ret = regmap_reinit_cache(wm8994->regmap, regmap_config); 51934697898SMark Brown if (ret != 0) { 52034697898SMark Brown dev_err(wm8994->dev, "Failed to reinit register cache: %d\n", 52134697898SMark Brown ret); 52234697898SMark Brown return ret; 52334697898SMark Brown } 5249e501086SMark Brown 525f3799e93SMark Brown /* Explicitly put the device into reset in case regulators 526f3799e93SMark Brown * don't get disabled in order to ensure we know the device 527f3799e93SMark Brown * state. 528f3799e93SMark Brown */ 529f3799e93SMark Brown ret = wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 530f3799e93SMark Brown wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET)); 531f3799e93SMark Brown if (ret != 0) { 532f3799e93SMark Brown dev_err(wm8994->dev, "Failed to reset device: %d\n", ret); 533f3799e93SMark Brown return ret; 534f3799e93SMark Brown } 535f3799e93SMark Brown 536462835e4SMark Brown if (regmap_patch) { 537462835e4SMark Brown ret = regmap_register_patch(wm8994->regmap, regmap_patch, 538462835e4SMark Brown patch_regs); 539462835e4SMark Brown if (ret != 0) { 540462835e4SMark Brown dev_err(wm8994->dev, "Failed to register patch: %d\n", 541462835e4SMark Brown ret); 5429db4249fSMark Brown goto err; 543462835e4SMark Brown } 544462835e4SMark Brown } 545462835e4SMark Brown 546c9fbf7e0SMark Brown wm8994->irq_base = pdata->irq_base; 5479e501086SMark Brown wm8994->gpio_base = pdata->gpio_base; 5489e501086SMark Brown 5499e501086SMark Brown /* GPIO configuration is only applied if it's non-zero */ 5509e501086SMark Brown for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { 5519e501086SMark Brown if (pdata->gpio_defaults[i]) { 5529e501086SMark Brown wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, 553a8a8fc28SMark Brown 0xffff, pdata->gpio_defaults[i]); 5549e501086SMark Brown } 5559e501086SMark Brown } 556881de670SMark Brown 557881de670SMark Brown wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; 55826c34c25SMark Brown 55926c34c25SMark Brown if (pdata->spkmode_pu) 56026c34c25SMark Brown pulls |= WM8994_SPKMODE_PU; 5619e501086SMark Brown 56226c34c25SMark Brown /* Disable unneeded pulls */ 563881de670SMark Brown wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, 56426c34c25SMark Brown WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | 56526c34c25SMark Brown WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, 56626c34c25SMark Brown pulls); 567881de670SMark Brown 5689e501086SMark Brown /* In some system designs where the regulators are not in use, 5699e501086SMark Brown * we can achieve a small reduction in leakage currents by 5709e501086SMark Brown * floating LDO outputs. This bit makes no difference if the 5719e501086SMark Brown * LDOs are enabled, it only affects cases where the LDOs were 5729e501086SMark Brown * in operation and are then disabled. 5739e501086SMark Brown */ 5749e501086SMark Brown for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { 5759e501086SMark Brown if (wm8994_ldo_in_use(pdata, i)) 5769e501086SMark Brown wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 5779e501086SMark Brown WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); 5789e501086SMark Brown else 5799e501086SMark Brown wm8994_set_bits(wm8994, WM8994_LDO_1 + i, 5809e501086SMark Brown WM8994_LDO1_DISCH, 0); 5819e501086SMark Brown } 5829e501086SMark Brown 583c9fbf7e0SMark Brown wm8994_irq_init(wm8994); 584c9fbf7e0SMark Brown 5859e501086SMark Brown ret = mfd_add_devices(wm8994->dev, -1, 5869e501086SMark Brown wm8994_devs, ARRAY_SIZE(wm8994_devs), 58755692af5SMark Brown NULL, 0, NULL); 5889e501086SMark Brown if (ret != 0) { 5899e501086SMark Brown dev_err(wm8994->dev, "Failed to add children: %d\n", ret); 590c9fbf7e0SMark Brown goto err_irq; 5919e501086SMark Brown } 5929e501086SMark Brown 593d450f19eSMark Brown pm_runtime_enable(wm8994->dev); 594ee67b0cdSMark Brown pm_runtime_idle(wm8994->dev); 595d450f19eSMark Brown 5969e501086SMark Brown return 0; 5979e501086SMark Brown 598c9fbf7e0SMark Brown err_irq: 599c9fbf7e0SMark Brown wm8994_irq_exit(wm8994); 6009e501086SMark Brown err_enable: 601559e0df6SMark Brown regulator_bulk_disable(wm8994->num_supplies, 6029e501086SMark Brown wm8994->supplies); 603202b5689SViresh Kumar err_regulator_free: 604202b5689SViresh Kumar regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 6059db4249fSMark Brown err: 6069e501086SMark Brown mfd_remove_devices(wm8994->dev); 6079e501086SMark Brown return ret; 6089e501086SMark Brown } 6099e501086SMark Brown 6104740f73fSBill Pemberton static void wm8994_device_exit(struct wm8994 *wm8994) 6119e501086SMark Brown { 612d450f19eSMark Brown pm_runtime_disable(wm8994->dev); 613c9fbf7e0SMark Brown wm8994_irq_exit(wm8994); 6143e56c468SViresh Kumar regulator_bulk_disable(wm8994->num_supplies, wm8994->supplies); 615202b5689SViresh Kumar regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); 616bb63f7d3SViresh Kumar mfd_remove_devices(wm8994->dev); 6179e501086SMark Brown } 6189e501086SMark Brown 619cf763c2eSMark Brown static const struct of_device_id wm8994_of_match[] = { 62039aa3b5aSMark Brown { .compatible = "wlf,wm1811", .data = (void *)WM1811 }, 62139aa3b5aSMark Brown { .compatible = "wlf,wm8994", .data = (void *)WM8994 }, 62239aa3b5aSMark Brown { .compatible = "wlf,wm8958", .data = (void *)WM8958 }, 623cf763c2eSMark Brown { } 624cf763c2eSMark Brown }; 625cf763c2eSMark Brown MODULE_DEVICE_TABLE(of, wm8994_of_match); 626cf763c2eSMark Brown 627f791be49SBill Pemberton static int wm8994_i2c_probe(struct i2c_client *i2c, 6289e501086SMark Brown const struct i2c_device_id *id) 6299e501086SMark Brown { 63020fb2772SMark Brown const struct of_device_id *of_id; 6319e501086SMark Brown struct wm8994 *wm8994; 632d6c645fcSMark Brown int ret; 6339e501086SMark Brown 6342fa33494SMark Brown wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL); 635d0a11693SAxel Lin if (wm8994 == NULL) 6369e501086SMark Brown return -ENOMEM; 6379e501086SMark Brown 6389e501086SMark Brown i2c_set_clientdata(i2c, wm8994); 6399e501086SMark Brown wm8994->dev = &i2c->dev; 640c9fbf7e0SMark Brown wm8994->irq = i2c->irq; 64120fb2772SMark Brown 64220fb2772SMark Brown if (i2c->dev.of_node) { 64320fb2772SMark Brown of_id = of_match_device(wm8994_of_match, &i2c->dev); 64420fb2772SMark Brown if (of_id) 6457f8279ceSLee Jones wm8994->type = (enum wm8994_type)of_id->data; 64620fb2772SMark Brown } else { 647559e0df6SMark Brown wm8994->type = id->driver_data; 64820fb2772SMark Brown } 6499e501086SMark Brown 6509db4249fSMark Brown wm8994->regmap = devm_regmap_init_i2c(i2c, &wm8994_base_regmap_config); 651d6c645fcSMark Brown if (IS_ERR(wm8994->regmap)) { 652d6c645fcSMark Brown ret = PTR_ERR(wm8994->regmap); 653d6c645fcSMark Brown dev_err(wm8994->dev, "Failed to allocate register map: %d\n", 654d6c645fcSMark Brown ret); 655d6c645fcSMark Brown return ret; 656d6c645fcSMark Brown } 657d6c645fcSMark Brown 658559e0df6SMark Brown return wm8994_device_init(wm8994, i2c->irq); 6599e501086SMark Brown } 6609e501086SMark Brown 6614740f73fSBill Pemberton static int wm8994_i2c_remove(struct i2c_client *i2c) 6629e501086SMark Brown { 6639e501086SMark Brown struct wm8994 *wm8994 = i2c_get_clientdata(i2c); 6649e501086SMark Brown 6659e501086SMark Brown wm8994_device_exit(wm8994); 6669e501086SMark Brown 6679e501086SMark Brown return 0; 6689e501086SMark Brown } 6699e501086SMark Brown 6709e501086SMark Brown static const struct i2c_device_id wm8994_i2c_id[] = { 671b1f43bf3SMark Brown { "wm1811", WM1811 }, 67271d17184SMark Brown { "wm1811a", WM1811 }, 673559e0df6SMark Brown { "wm8994", WM8994 }, 674559e0df6SMark Brown { "wm8958", WM8958 }, 6759e501086SMark Brown { } 6769e501086SMark Brown }; 6779e501086SMark Brown MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); 6789e501086SMark Brown 6796394678eSMark Brown static const struct dev_pm_ops wm8994_pm_ops = { 6806394678eSMark Brown SET_RUNTIME_PM_OPS(wm8994_suspend, wm8994_resume, NULL) 6816394678eSMark Brown }; 682d450f19eSMark Brown 6839e501086SMark Brown static struct i2c_driver wm8994_i2c_driver = { 6849e501086SMark Brown .driver = { 6859e501086SMark Brown .name = "wm8994", 686d450f19eSMark Brown .pm = &wm8994_pm_ops, 68720fb2772SMark Brown .of_match_table = of_match_ptr(wm8994_of_match), 6889e501086SMark Brown }, 6899e501086SMark Brown .probe = wm8994_i2c_probe, 69084449216SBill Pemberton .remove = wm8994_i2c_remove, 6919e501086SMark Brown .id_table = wm8994_i2c_id, 6929e501086SMark Brown }; 6939e501086SMark Brown 694ceb57d27SMark Brown module_i2c_driver(wm8994_i2c_driver); 6959e501086SMark Brown 6969e501086SMark Brown MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); 6979e501086SMark Brown MODULE_LICENSE("GPL"); 6989e501086SMark Brown MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 699