12373f6b9SDirk Brandewie /* 22373f6b9SDirk Brandewie * Synopsys DesignWare I2C adapter driver (master only). 32373f6b9SDirk Brandewie * 42373f6b9SDirk Brandewie * Based on the TI DAVINCI I2C adapter driver. 52373f6b9SDirk Brandewie * 62373f6b9SDirk Brandewie * Copyright (C) 2006 Texas Instruments. 72373f6b9SDirk Brandewie * Copyright (C) 2007 MontaVista Software Inc. 82373f6b9SDirk Brandewie * Copyright (C) 2009 Provigent Ltd. 92373f6b9SDirk Brandewie * 102373f6b9SDirk Brandewie * ---------------------------------------------------------------------------- 112373f6b9SDirk Brandewie * 122373f6b9SDirk Brandewie * This program is free software; you can redistribute it and/or modify 132373f6b9SDirk Brandewie * it under the terms of the GNU General Public License as published by 142373f6b9SDirk Brandewie * the Free Software Foundation; either version 2 of the License, or 152373f6b9SDirk Brandewie * (at your option) any later version. 162373f6b9SDirk Brandewie * 172373f6b9SDirk Brandewie * This program is distributed in the hope that it will be useful, 182373f6b9SDirk Brandewie * but WITHOUT ANY WARRANTY; without even the implied warranty of 192373f6b9SDirk Brandewie * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 202373f6b9SDirk Brandewie * GNU General Public License for more details. 212373f6b9SDirk Brandewie * ---------------------------------------------------------------------------- 222373f6b9SDirk Brandewie * 232373f6b9SDirk Brandewie */ 242373f6b9SDirk Brandewie #include <linux/kernel.h> 252373f6b9SDirk Brandewie #include <linux/module.h> 262373f6b9SDirk Brandewie #include <linux/delay.h> 2756d4b8a2SMika Westerberg #include <linux/dmi.h> 282373f6b9SDirk Brandewie #include <linux/i2c.h> 292373f6b9SDirk Brandewie #include <linux/clk.h> 30a445900cSCarl Peng #include <linux/clk-provider.h> 312373f6b9SDirk Brandewie #include <linux/errno.h> 322373f6b9SDirk Brandewie #include <linux/sched.h> 332373f6b9SDirk Brandewie #include <linux/err.h> 342373f6b9SDirk Brandewie #include <linux/interrupt.h> 359803f868SChristian Ruppert #include <linux/of.h> 362373f6b9SDirk Brandewie #include <linux/platform_device.h> 373bf3b289SDeepak Sikri #include <linux/pm.h> 387272194eSMika Westerberg #include <linux/pm_runtime.h> 394c5301abSMika Westerberg #include <linux/property.h> 402373f6b9SDirk Brandewie #include <linux/io.h> 41ab809fd8SZhangfei Gao #include <linux/reset.h> 422373f6b9SDirk Brandewie #include <linux/slab.h> 43b61b1415SMika Westerberg #include <linux/acpi.h> 444bcfda09STan, Raymond #include <linux/platform_data/i2c-designware.h> 452373f6b9SDirk Brandewie #include "i2c-designware-core.h" 462373f6b9SDirk Brandewie 471d31b58fSDirk Brandewie static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 481d31b58fSDirk Brandewie { 491d31b58fSDirk Brandewie return clk_get_rate(dev->clk)/1000; 501d31b58fSDirk Brandewie } 512373f6b9SDirk Brandewie 52b61b1415SMika Westerberg #ifdef CONFIG_ACPI 5356d4b8a2SMika Westerberg /* 5456d4b8a2SMika Westerberg * The HCNT/LCNT information coming from ACPI should be the most accurate 5556d4b8a2SMika Westerberg * for given platform. However, some systems get it wrong. On such systems 5656d4b8a2SMika Westerberg * we get better results by calculating those based on the input clock. 5756d4b8a2SMika Westerberg */ 5856d4b8a2SMika Westerberg static const struct dmi_system_id dw_i2c_no_acpi_params[] = { 5956d4b8a2SMika Westerberg { 6056d4b8a2SMika Westerberg .ident = "Dell Inspiron 7348", 6156d4b8a2SMika Westerberg .matches = { 6256d4b8a2SMika Westerberg DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 6356d4b8a2SMika Westerberg DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7348"), 6456d4b8a2SMika Westerberg }, 6556d4b8a2SMika Westerberg }, 6656d4b8a2SMika Westerberg { } 6756d4b8a2SMika Westerberg }; 6856d4b8a2SMika Westerberg 6957cd1e30SMika Westerberg static void dw_i2c_acpi_params(struct platform_device *pdev, char method[], 7057cd1e30SMika Westerberg u16 *hcnt, u16 *lcnt, u32 *sda_hold) 7157cd1e30SMika Westerberg { 7257cd1e30SMika Westerberg struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; 7357cd1e30SMika Westerberg acpi_handle handle = ACPI_HANDLE(&pdev->dev); 7457cd1e30SMika Westerberg union acpi_object *obj; 7557cd1e30SMika Westerberg 7656d4b8a2SMika Westerberg if (dmi_check_system(dw_i2c_no_acpi_params)) 7756d4b8a2SMika Westerberg return; 7856d4b8a2SMika Westerberg 7957cd1e30SMika Westerberg if (ACPI_FAILURE(acpi_evaluate_object(handle, method, NULL, &buf))) 8057cd1e30SMika Westerberg return; 8157cd1e30SMika Westerberg 8257cd1e30SMika Westerberg obj = (union acpi_object *)buf.pointer; 8357cd1e30SMika Westerberg if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 3) { 8457cd1e30SMika Westerberg const union acpi_object *objs = obj->package.elements; 8557cd1e30SMika Westerberg 8657cd1e30SMika Westerberg *hcnt = (u16)objs[0].integer.value; 8757cd1e30SMika Westerberg *lcnt = (u16)objs[1].integer.value; 8857cd1e30SMika Westerberg *sda_hold = (u32)objs[2].integer.value; 8957cd1e30SMika Westerberg } 9057cd1e30SMika Westerberg 9157cd1e30SMika Westerberg kfree(buf.pointer); 9257cd1e30SMika Westerberg } 9357cd1e30SMika Westerberg 94b61b1415SMika Westerberg static int dw_i2c_acpi_configure(struct platform_device *pdev) 95b61b1415SMika Westerberg { 96b61b1415SMika Westerberg struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 97ad258fb9SJan Kiszka u32 ss_ht = 0, fp_ht = 0, hs_ht = 0, fs_ht = 0; 98a3d411fbSHans de Goede acpi_handle handle = ACPI_HANDLE(&pdev->dev); 992d244c81SXiangliang Yu const struct acpi_device_id *id; 100a3d411fbSHans de Goede struct acpi_device *adev; 101a3d411fbSHans de Goede const char *uid; 102b61b1415SMika Westerberg 103b61b1415SMika Westerberg dev->adapter.nr = -1; 104b61b1415SMika Westerberg dev->tx_fifo_depth = 32; 105b61b1415SMika Westerberg dev->rx_fifo_depth = 32; 10657cd1e30SMika Westerberg 10757cd1e30SMika Westerberg /* 108bd698d24Schin.yew.tan@intel.com * Try to get SDA hold time and *CNT values from an ACPI method for 109bd698d24Schin.yew.tan@intel.com * selected speed modes. 11057cd1e30SMika Westerberg */ 1119d640843SArd Biesheuvel dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, &ss_ht); 1129d640843SArd Biesheuvel dw_i2c_acpi_params(pdev, "FPCN", &dev->fp_hcnt, &dev->fp_lcnt, &fp_ht); 1139d640843SArd Biesheuvel dw_i2c_acpi_params(pdev, "HSCN", &dev->hs_hcnt, &dev->hs_lcnt, &hs_ht); 1149d640843SArd Biesheuvel dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, &fs_ht); 1159d640843SArd Biesheuvel 116bd698d24Schin.yew.tan@intel.com switch (dev->clk_freq) { 117bd698d24Schin.yew.tan@intel.com case 100000: 1189d640843SArd Biesheuvel dev->sda_hold_time = ss_ht; 119bd698d24Schin.yew.tan@intel.com break; 120bd698d24Schin.yew.tan@intel.com case 1000000: 1219d640843SArd Biesheuvel dev->sda_hold_time = fp_ht; 122bd698d24Schin.yew.tan@intel.com break; 123bd698d24Schin.yew.tan@intel.com case 3400000: 1249d640843SArd Biesheuvel dev->sda_hold_time = hs_ht; 125bd698d24Schin.yew.tan@intel.com break; 126bd698d24Schin.yew.tan@intel.com case 400000: 127bd698d24Schin.yew.tan@intel.com default: 1289d640843SArd Biesheuvel dev->sda_hold_time = fs_ht; 129bd698d24Schin.yew.tan@intel.com break; 130bd698d24Schin.yew.tan@intel.com } 13157cd1e30SMika Westerberg 1322d244c81SXiangliang Yu id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); 1332d244c81SXiangliang Yu if (id && id->driver_data) 13486524e54SHans de Goede dev->flags |= (u32)id->driver_data; 1352d244c81SXiangliang Yu 136a3d411fbSHans de Goede if (acpi_bus_get_device(handle, &adev)) 137a3d411fbSHans de Goede return -ENODEV; 138a3d411fbSHans de Goede 139a3d411fbSHans de Goede /* 140a3d411fbSHans de Goede * Cherrytrail I2C7 gets used for the PMIC which gets accessed 141a3d411fbSHans de Goede * through ACPI opregions during late suspend / early resume 142a3d411fbSHans de Goede * disable pm for it. 143a3d411fbSHans de Goede */ 144a3d411fbSHans de Goede uid = adev->pnp.unique_id; 145a3d411fbSHans de Goede if ((dev->flags & MODEL_CHERRYTRAIL) && !strcmp(uid, "7")) 146a3d411fbSHans de Goede dev->pm_disabled = true; 147a3d411fbSHans de Goede 148b61b1415SMika Westerberg return 0; 149b61b1415SMika Westerberg } 150b61b1415SMika Westerberg 151b61b1415SMika Westerberg static const struct acpi_device_id dw_i2c_acpi_match[] = { 152b61b1415SMika Westerberg { "INT33C2", 0 }, 153b61b1415SMika Westerberg { "INT33C3", 0 }, 15425b3dfc8SMika Westerberg { "INT3432", 0 }, 15525b3dfc8SMika Westerberg { "INT3433", 0 }, 1565a7e6bd8SMika Westerberg { "80860F41", 0 }, 157fd476fa2SHans de Goede { "808622C1", MODEL_CHERRYTRAIL }, 1582d244c81SXiangliang Yu { "AMD0010", ACCESS_INTR_MASK }, 159e4e666baSXiangliang Yu { "AMDI0010", ACCESS_INTR_MASK }, 16090708ce2SSuravee Suthikulpanit { "AMDI0510", 0 }, 16104a407f6SLoc Ho { "APMC0D0F", 0 }, 16258dd8abfSHanjun Guo { "HISI02A1", 0 }, 16358dd8abfSHanjun Guo { "HISI02A2", 0 }, 164b61b1415SMika Westerberg { } 165b61b1415SMika Westerberg }; 166b61b1415SMika Westerberg MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); 167b61b1415SMika Westerberg #else 168b61b1415SMika Westerberg static inline int dw_i2c_acpi_configure(struct platform_device *pdev) 169b61b1415SMika Westerberg { 170b61b1415SMika Westerberg return -ENODEV; 171b61b1415SMika Westerberg } 172b61b1415SMika Westerberg #endif 173b61b1415SMika Westerberg 174b33af11dSSuravee Suthikulpanit static int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare) 175b33af11dSSuravee Suthikulpanit { 176b33af11dSSuravee Suthikulpanit if (IS_ERR(i_dev->clk)) 177b33af11dSSuravee Suthikulpanit return PTR_ERR(i_dev->clk); 178b33af11dSSuravee Suthikulpanit 179b33af11dSSuravee Suthikulpanit if (prepare) 180b33af11dSSuravee Suthikulpanit return clk_prepare_enable(i_dev->clk); 181b33af11dSSuravee Suthikulpanit 182b33af11dSSuravee Suthikulpanit clk_disable_unprepare(i_dev->clk); 183b33af11dSSuravee Suthikulpanit return 0; 184b33af11dSSuravee Suthikulpanit } 185b33af11dSSuravee Suthikulpanit 1868e598769STin Huynh static void dw_i2c_set_fifo_size(struct dw_i2c_dev *dev, int id) 1878e598769STin Huynh { 1888e598769STin Huynh u32 param, tx_fifo_depth, rx_fifo_depth; 1898e598769STin Huynh 1908e598769STin Huynh /* 1918e598769STin Huynh * Try to detect the FIFO depth if not set by interface driver, 1928e598769STin Huynh * the depth could be from 2 to 256 from HW spec. 1938e598769STin Huynh */ 1948e598769STin Huynh param = i2c_dw_read_comp_param(dev); 1958e598769STin Huynh tx_fifo_depth = ((param >> 16) & 0xff) + 1; 1968e598769STin Huynh rx_fifo_depth = ((param >> 8) & 0xff) + 1; 1978e598769STin Huynh if (!dev->tx_fifo_depth) { 1988e598769STin Huynh dev->tx_fifo_depth = tx_fifo_depth; 1998e598769STin Huynh dev->rx_fifo_depth = rx_fifo_depth; 2008e598769STin Huynh dev->adapter.nr = id; 2018e598769STin Huynh } else if (tx_fifo_depth >= 2) { 2028e598769STin Huynh dev->tx_fifo_depth = min_t(u32, dev->tx_fifo_depth, 2038e598769STin Huynh tx_fifo_depth); 2048e598769STin Huynh dev->rx_fifo_depth = min_t(u32, dev->rx_fifo_depth, 2058e598769STin Huynh rx_fifo_depth); 2068e598769STin Huynh } 2078e598769STin Huynh } 2088e598769STin Huynh 2096ad6fde3SJarkko Nikula static int dw_i2c_plat_probe(struct platform_device *pdev) 2102373f6b9SDirk Brandewie { 2114c5301abSMika Westerberg struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); 2122373f6b9SDirk Brandewie struct dw_i2c_dev *dev; 2132373f6b9SDirk Brandewie struct i2c_adapter *adap; 2141cb715caSAndy Shevchenko struct resource *mem; 2152373f6b9SDirk Brandewie int irq, r; 21610f8e7fbSJarkko Nikula u32 acpi_speed, ht = 0; 2172373f6b9SDirk Brandewie 2182373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0); 219b20d3864SAlexey Brodkin if (irq < 0) 220b20d3864SAlexey Brodkin return irq; 2212373f6b9SDirk Brandewie 2221cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); 2231cb715caSAndy Shevchenko if (!dev) 2241cb715caSAndy Shevchenko return -ENOMEM; 2252373f6b9SDirk Brandewie 2263cc2d009SWolfram Sang mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 2271cb715caSAndy Shevchenko dev->base = devm_ioremap_resource(&pdev->dev, mem); 2281cb715caSAndy Shevchenko if (IS_ERR(dev->base)) 2291cb715caSAndy Shevchenko return PTR_ERR(dev->base); 2302373f6b9SDirk Brandewie 2311cb715caSAndy Shevchenko dev->dev = &pdev->dev; 2322373f6b9SDirk Brandewie dev->irq = irq; 2332373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev); 2342373f6b9SDirk Brandewie 235ab809fd8SZhangfei Gao dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL); 236ab809fd8SZhangfei Gao if (IS_ERR(dev->rst)) { 237ab809fd8SZhangfei Gao if (PTR_ERR(dev->rst) == -EPROBE_DEFER) 238ab809fd8SZhangfei Gao return -EPROBE_DEFER; 239ab809fd8SZhangfei Gao } else { 240ab809fd8SZhangfei Gao reset_control_deassert(dev->rst); 241ab809fd8SZhangfei Gao } 242ab809fd8SZhangfei Gao 2434c5301abSMika Westerberg if (pdata) { 24419c0a539SWeifeng Voon dev->clk_freq = pdata->i2c_scl_freq; 2454c5301abSMika Westerberg } else { 2464c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "i2c-sda-hold-time-ns", 2474c5301abSMika Westerberg &ht); 2484c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "i2c-sda-falling-time-ns", 2496468276bSRomain Baeriswyl &dev->sda_falling_time); 2504c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "i2c-scl-falling-time-ns", 2516468276bSRomain Baeriswyl &dev->scl_falling_time); 2524c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "clock-frequency", 25319c0a539SWeifeng Voon &dev->clk_freq); 2544c5301abSMika Westerberg } 2558e5f6b2aSRomain Baeriswyl 25610f8e7fbSJarkko Nikula acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev); 257973652dbSJarkko Nikula /* 258973652dbSJarkko Nikula * Find bus speed from the "clock-frequency" device property, ACPI 259973652dbSJarkko Nikula * or by using fast mode if neither is set. 260973652dbSJarkko Nikula */ 261973652dbSJarkko Nikula if (acpi_speed && dev->clk_freq) 262973652dbSJarkko Nikula dev->clk_freq = min(dev->clk_freq, acpi_speed); 263973652dbSJarkko Nikula else if (acpi_speed || dev->clk_freq) 264973652dbSJarkko Nikula dev->clk_freq = max(dev->clk_freq, acpi_speed); 265973652dbSJarkko Nikula else 266973652dbSJarkko Nikula dev->clk_freq = 400000; 26710f8e7fbSJarkko Nikula 2684c5301abSMika Westerberg if (has_acpi_companion(&pdev->dev)) 2694c5301abSMika Westerberg dw_i2c_acpi_configure(pdev); 2704c5301abSMika Westerberg 2714c5301abSMika Westerberg /* 272d608c3d9SWeifeng Voon * Only standard mode at 100kHz, fast mode at 400kHz, 273b6e67145SWeifeng Voon * fast mode plus at 1MHz and high speed mode at 3.4MHz are supported. 2748e5f6b2aSRomain Baeriswyl */ 275d608c3d9SWeifeng Voon if (dev->clk_freq != 100000 && dev->clk_freq != 400000 276b6e67145SWeifeng Voon && dev->clk_freq != 1000000 && dev->clk_freq != 3400000) { 277d608c3d9SWeifeng Voon dev_err(&pdev->dev, 278b6e67145SWeifeng Voon "Only 100kHz, 400kHz, 1MHz and 3.4MHz supported"); 279ab809fd8SZhangfei Gao r = -EINVAL; 280ab809fd8SZhangfei Gao goto exit_reset; 2818e5f6b2aSRomain Baeriswyl } 2829803f868SChristian Ruppert 283086cb4afSHans de Goede r = i2c_dw_probe_lock_support(dev); 284894acb2fSDavid Box if (r) 285ab809fd8SZhangfei Gao goto exit_reset; 286894acb2fSDavid Box 287f06122f0SAlexander Stein dev->functionality = I2C_FUNC_10BIT_ADDR | DW_IC_DEFAULT_FUNCTIONALITY; 288548e6695SWeifeng Voon 289548e6695SWeifeng Voon dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | 290548e6695SWeifeng Voon DW_IC_CON_RESTART_EN; 291548e6695SWeifeng Voon 292b6e67145SWeifeng Voon switch (dev->clk_freq) { 293b6e67145SWeifeng Voon case 100000: 294548e6695SWeifeng Voon dev->master_cfg |= DW_IC_CON_SPEED_STD; 295b6e67145SWeifeng Voon break; 296b6e67145SWeifeng Voon case 3400000: 297b6e67145SWeifeng Voon dev->master_cfg |= DW_IC_CON_SPEED_HIGH; 298b6e67145SWeifeng Voon break; 299b6e67145SWeifeng Voon default: 300548e6695SWeifeng Voon dev->master_cfg |= DW_IC_CON_SPEED_FAST; 301b6e67145SWeifeng Voon } 3022fa8326bSDirk Brandewie 303925ddb24SMika Westerberg dev->clk = devm_clk_get(&pdev->dev, NULL); 304b33af11dSSuravee Suthikulpanit if (!i2c_dw_plat_prepare_clk(dev, true)) { 305925ddb24SMika Westerberg dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; 306925ddb24SMika Westerberg 307b33af11dSSuravee Suthikulpanit if (!dev->sda_hold_time && ht) 308b33af11dSSuravee Suthikulpanit dev->sda_hold_time = div_u64( 309b33af11dSSuravee Suthikulpanit (u64)dev->get_clk_rate_khz(dev) * ht + 500000, 310925ddb24SMika Westerberg 1000000); 311925ddb24SMika Westerberg } 312925ddb24SMika Westerberg 3138e598769STin Huynh dw_i2c_set_fifo_size(dev, pdev->id); 3142373f6b9SDirk Brandewie 3152373f6b9SDirk Brandewie adap = &dev->adapter; 3162373f6b9SDirk Brandewie adap->owner = THIS_MODULE; 31770fba830SWolfram Sang adap->class = I2C_CLASS_DEPRECATED; 3188eb5c87aSDustin Byford ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); 319af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node; 3202373f6b9SDirk Brandewie 32141c80b8aSHans de Goede if (dev->pm_disabled) { 322894acb2fSDavid Box pm_runtime_forbid(&pdev->dev); 323894acb2fSDavid Box } else { 32443452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); 32543452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev); 3267272194eSMika Westerberg pm_runtime_set_active(&pdev->dev); 3277272194eSMika Westerberg pm_runtime_enable(&pdev->dev); 328894acb2fSDavid Box } 3297272194eSMika Westerberg 330d55fc378SLinus Torvalds r = i2c_dw_probe(dev); 331ab809fd8SZhangfei Gao if (r) 332ab809fd8SZhangfei Gao goto exit_probe; 33336d48fb5SWolfram Sang 334e79e72c5SJarkko Nikula return r; 335ab809fd8SZhangfei Gao 336ab809fd8SZhangfei Gao exit_probe: 33741c80b8aSHans de Goede if (!dev->pm_disabled) 338ab809fd8SZhangfei Gao pm_runtime_disable(&pdev->dev); 339ab809fd8SZhangfei Gao exit_reset: 340ab809fd8SZhangfei Gao if (!IS_ERR_OR_NULL(dev->rst)) 341ab809fd8SZhangfei Gao reset_control_assert(dev->rst); 342ab809fd8SZhangfei Gao return r; 3432373f6b9SDirk Brandewie } 3442373f6b9SDirk Brandewie 3456ad6fde3SJarkko Nikula static int dw_i2c_plat_remove(struct platform_device *pdev) 3462373f6b9SDirk Brandewie { 3472373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 3482373f6b9SDirk Brandewie 3497272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev); 3507272194eSMika Westerberg 3512373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter); 3522373f6b9SDirk Brandewie 353f3fa9f3dSDirk Brandewie i2c_dw_disable(dev); 3542373f6b9SDirk Brandewie 355edfc3901SMika Westerberg pm_runtime_dont_use_autosuspend(&pdev->dev); 356edfc3901SMika Westerberg pm_runtime_put_sync(&pdev->dev); 35741c80b8aSHans de Goede if (!dev->pm_disabled) 3587272194eSMika Westerberg pm_runtime_disable(&pdev->dev); 359ab809fd8SZhangfei Gao if (!IS_ERR_OR_NULL(dev->rst)) 360ab809fd8SZhangfei Gao reset_control_assert(dev->rst); 3617272194eSMika Westerberg 362086cb4afSHans de Goede i2c_dw_remove_lock_support(dev); 363086cb4afSHans de Goede 3642373f6b9SDirk Brandewie return 0; 3652373f6b9SDirk Brandewie } 3662373f6b9SDirk Brandewie 367af71100cSRob Herring #ifdef CONFIG_OF 368af71100cSRob Herring static const struct of_device_id dw_i2c_of_match[] = { 369af71100cSRob Herring { .compatible = "snps,designware-i2c", }, 370af71100cSRob Herring {}, 371af71100cSRob Herring }; 372af71100cSRob Herring MODULE_DEVICE_TABLE(of, dw_i2c_of_match); 373af71100cSRob Herring #endif 374af71100cSRob Herring 3758503ff16SJisheng Zhang #ifdef CONFIG_PM_SLEEP 3766ad6fde3SJarkko Nikula static int dw_i2c_plat_prepare(struct device *dev) 3778503ff16SJisheng Zhang { 3788503ff16SJisheng Zhang return pm_runtime_suspended(dev); 3798503ff16SJisheng Zhang } 3808503ff16SJisheng Zhang 3816ad6fde3SJarkko Nikula static void dw_i2c_plat_complete(struct device *dev) 3828503ff16SJisheng Zhang { 3838503ff16SJisheng Zhang if (dev->power.direct_complete) 3848503ff16SJisheng Zhang pm_request_resume(dev); 3858503ff16SJisheng Zhang } 3868503ff16SJisheng Zhang #else 387319d7f05SJarkko Nikula #define dw_i2c_plat_prepare NULL 388319d7f05SJarkko Nikula #define dw_i2c_plat_complete NULL 3898503ff16SJisheng Zhang #endif 3908503ff16SJisheng Zhang 3911fc2fe20SMika Westerberg #ifdef CONFIG_PM 3926ad6fde3SJarkko Nikula static int dw_i2c_plat_suspend(struct device *dev) 3933bf3b289SDeepak Sikri { 3943bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3953bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3963bf3b289SDeepak Sikri 397f537295aSMika Westerberg i2c_dw_disable(i_dev); 398b33af11dSSuravee Suthikulpanit i2c_dw_plat_prepare_clk(i_dev, false); 3993bf3b289SDeepak Sikri 4003bf3b289SDeepak Sikri return 0; 4013bf3b289SDeepak Sikri } 4023bf3b289SDeepak Sikri 4036ad6fde3SJarkko Nikula static int dw_i2c_plat_resume(struct device *dev) 4043bf3b289SDeepak Sikri { 4053bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 4063bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 4073bf3b289SDeepak Sikri 408b33af11dSSuravee Suthikulpanit i2c_dw_plat_prepare_clk(i_dev, true); 4093bf3b289SDeepak Sikri i2c_dw_init(i_dev); 4103bf3b289SDeepak Sikri 4113bf3b289SDeepak Sikri return 0; 4123bf3b289SDeepak Sikri } 4133bf3b289SDeepak Sikri 4148503ff16SJisheng Zhang static const struct dev_pm_ops dw_i2c_dev_pm_ops = { 4156ad6fde3SJarkko Nikula .prepare = dw_i2c_plat_prepare, 4166ad6fde3SJarkko Nikula .complete = dw_i2c_plat_complete, 4176ad6fde3SJarkko Nikula SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume) 4186ad6fde3SJarkko Nikula SET_RUNTIME_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume, NULL) 4198503ff16SJisheng Zhang }; 4208503ff16SJisheng Zhang 4218503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops) 4228503ff16SJisheng Zhang #else 4238503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS NULL 4248503ff16SJisheng Zhang #endif 4251fc2fe20SMika Westerberg 4262373f6b9SDirk Brandewie /* work with hotplug and coldplug */ 4272373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware"); 4282373f6b9SDirk Brandewie 4292373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = { 4306ad6fde3SJarkko Nikula .probe = dw_i2c_plat_probe, 4316ad6fde3SJarkko Nikula .remove = dw_i2c_plat_remove, 4322373f6b9SDirk Brandewie .driver = { 4332373f6b9SDirk Brandewie .name = "i2c_designware", 434af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match), 435b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), 4368503ff16SJisheng Zhang .pm = DW_I2C_DEV_PMOPS, 4372373f6b9SDirk Brandewie }, 4382373f6b9SDirk Brandewie }; 4392373f6b9SDirk Brandewie 4402373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void) 4412373f6b9SDirk Brandewie { 442cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver); 4432373f6b9SDirk Brandewie } 44410452280SPratyush Anand subsys_initcall(dw_i2c_init_driver); 4452373f6b9SDirk Brandewie 4462373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void) 4472373f6b9SDirk Brandewie { 4482373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver); 4492373f6b9SDirk Brandewie } 4502373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver); 4512373f6b9SDirk Brandewie 4522373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); 4532373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); 4542373f6b9SDirk Brandewie MODULE_LICENSE("GPL"); 455