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> 412373f6b9SDirk Brandewie #include <linux/slab.h> 42b61b1415SMika Westerberg #include <linux/acpi.h> 434bcfda09STan, Raymond #include <linux/platform_data/i2c-designware.h> 442373f6b9SDirk Brandewie #include "i2c-designware-core.h" 452373f6b9SDirk Brandewie 461d31b58fSDirk Brandewie static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 471d31b58fSDirk Brandewie { 481d31b58fSDirk Brandewie return clk_get_rate(dev->clk)/1000; 491d31b58fSDirk Brandewie } 502373f6b9SDirk Brandewie 51b61b1415SMika Westerberg #ifdef CONFIG_ACPI 5256d4b8a2SMika Westerberg /* 5356d4b8a2SMika Westerberg * The HCNT/LCNT information coming from ACPI should be the most accurate 5456d4b8a2SMika Westerberg * for given platform. However, some systems get it wrong. On such systems 5556d4b8a2SMika Westerberg * we get better results by calculating those based on the input clock. 5656d4b8a2SMika Westerberg */ 5756d4b8a2SMika Westerberg static const struct dmi_system_id dw_i2c_no_acpi_params[] = { 5856d4b8a2SMika Westerberg { 5956d4b8a2SMika Westerberg .ident = "Dell Inspiron 7348", 6056d4b8a2SMika Westerberg .matches = { 6156d4b8a2SMika Westerberg DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 6256d4b8a2SMika Westerberg DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7348"), 6356d4b8a2SMika Westerberg }, 6456d4b8a2SMika Westerberg }, 6556d4b8a2SMika Westerberg { } 6656d4b8a2SMika Westerberg }; 6756d4b8a2SMika Westerberg 6857cd1e30SMika Westerberg static void dw_i2c_acpi_params(struct platform_device *pdev, char method[], 6957cd1e30SMika Westerberg u16 *hcnt, u16 *lcnt, u32 *sda_hold) 7057cd1e30SMika Westerberg { 7157cd1e30SMika Westerberg struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; 7257cd1e30SMika Westerberg acpi_handle handle = ACPI_HANDLE(&pdev->dev); 7357cd1e30SMika Westerberg union acpi_object *obj; 7457cd1e30SMika Westerberg 7556d4b8a2SMika Westerberg if (dmi_check_system(dw_i2c_no_acpi_params)) 7656d4b8a2SMika Westerberg return; 7756d4b8a2SMika Westerberg 7857cd1e30SMika Westerberg if (ACPI_FAILURE(acpi_evaluate_object(handle, method, NULL, &buf))) 7957cd1e30SMika Westerberg return; 8057cd1e30SMika Westerberg 8157cd1e30SMika Westerberg obj = (union acpi_object *)buf.pointer; 8257cd1e30SMika Westerberg if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 3) { 8357cd1e30SMika Westerberg const union acpi_object *objs = obj->package.elements; 8457cd1e30SMika Westerberg 8557cd1e30SMika Westerberg *hcnt = (u16)objs[0].integer.value; 8657cd1e30SMika Westerberg *lcnt = (u16)objs[1].integer.value; 8757cd1e30SMika Westerberg if (sda_hold) 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); 972d244c81SXiangliang Yu const struct acpi_device_id *id; 98b61b1415SMika Westerberg 99b61b1415SMika Westerberg dev->adapter.nr = -1; 100b61b1415SMika Westerberg dev->tx_fifo_depth = 32; 101b61b1415SMika Westerberg dev->rx_fifo_depth = 32; 10257cd1e30SMika Westerberg 10357cd1e30SMika Westerberg /* 10457cd1e30SMika Westerberg * Try to get SDA hold time and *CNT values from an ACPI method if 10557cd1e30SMika Westerberg * it exists for both supported speed modes. 10657cd1e30SMika Westerberg */ 1070b26c845SMika Westerberg dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, NULL); 10857cd1e30SMika Westerberg dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, 1090b26c845SMika Westerberg &dev->sda_hold_time); 110a92ec174SWeifeng Voon dw_i2c_acpi_params(pdev, "FPCN", &dev->fp_hcnt, &dev->fp_lcnt, NULL); 111a92ec174SWeifeng Voon dw_i2c_acpi_params(pdev, "HSCN", &dev->hs_hcnt, &dev->hs_lcnt, NULL); 11257cd1e30SMika Westerberg 1132d244c81SXiangliang Yu id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); 1142d244c81SXiangliang Yu if (id && id->driver_data) 11586524e54SHans de Goede dev->flags |= (u32)id->driver_data; 1162d244c81SXiangliang Yu 117b61b1415SMika Westerberg return 0; 118b61b1415SMika Westerberg } 119b61b1415SMika Westerberg 120b61b1415SMika Westerberg static const struct acpi_device_id dw_i2c_acpi_match[] = { 121b61b1415SMika Westerberg { "INT33C2", 0 }, 122b61b1415SMika Westerberg { "INT33C3", 0 }, 12325b3dfc8SMika Westerberg { "INT3432", 0 }, 12425b3dfc8SMika Westerberg { "INT3433", 0 }, 1255a7e6bd8SMika Westerberg { "80860F41", 0 }, 126fd476fa2SHans de Goede { "808622C1", MODEL_CHERRYTRAIL }, 1272d244c81SXiangliang Yu { "AMD0010", ACCESS_INTR_MASK }, 128e4e666baSXiangliang Yu { "AMDI0010", ACCESS_INTR_MASK }, 12990708ce2SSuravee Suthikulpanit { "AMDI0510", 0 }, 13004a407f6SLoc Ho { "APMC0D0F", 0 }, 131b61b1415SMika Westerberg { } 132b61b1415SMika Westerberg }; 133b61b1415SMika Westerberg MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); 134b61b1415SMika Westerberg #else 135b61b1415SMika Westerberg static inline int dw_i2c_acpi_configure(struct platform_device *pdev) 136b61b1415SMika Westerberg { 137b61b1415SMika Westerberg return -ENODEV; 138b61b1415SMika Westerberg } 139b61b1415SMika Westerberg #endif 140b61b1415SMika Westerberg 141b33af11dSSuravee Suthikulpanit static int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare) 142b33af11dSSuravee Suthikulpanit { 143b33af11dSSuravee Suthikulpanit if (IS_ERR(i_dev->clk)) 144b33af11dSSuravee Suthikulpanit return PTR_ERR(i_dev->clk); 145b33af11dSSuravee Suthikulpanit 146b33af11dSSuravee Suthikulpanit if (prepare) 147b33af11dSSuravee Suthikulpanit return clk_prepare_enable(i_dev->clk); 148b33af11dSSuravee Suthikulpanit 149b33af11dSSuravee Suthikulpanit clk_disable_unprepare(i_dev->clk); 150b33af11dSSuravee Suthikulpanit return 0; 151b33af11dSSuravee Suthikulpanit } 152b33af11dSSuravee Suthikulpanit 1538e598769STin Huynh static void dw_i2c_set_fifo_size(struct dw_i2c_dev *dev, int id) 1548e598769STin Huynh { 1558e598769STin Huynh u32 param, tx_fifo_depth, rx_fifo_depth; 1568e598769STin Huynh 1578e598769STin Huynh /* 1588e598769STin Huynh * Try to detect the FIFO depth if not set by interface driver, 1598e598769STin Huynh * the depth could be from 2 to 256 from HW spec. 1608e598769STin Huynh */ 1618e598769STin Huynh param = i2c_dw_read_comp_param(dev); 1628e598769STin Huynh tx_fifo_depth = ((param >> 16) & 0xff) + 1; 1638e598769STin Huynh rx_fifo_depth = ((param >> 8) & 0xff) + 1; 1648e598769STin Huynh if (!dev->tx_fifo_depth) { 1658e598769STin Huynh dev->tx_fifo_depth = tx_fifo_depth; 1668e598769STin Huynh dev->rx_fifo_depth = rx_fifo_depth; 1678e598769STin Huynh dev->adapter.nr = id; 1688e598769STin Huynh } else if (tx_fifo_depth >= 2) { 1698e598769STin Huynh dev->tx_fifo_depth = min_t(u32, dev->tx_fifo_depth, 1708e598769STin Huynh tx_fifo_depth); 1718e598769STin Huynh dev->rx_fifo_depth = min_t(u32, dev->rx_fifo_depth, 1728e598769STin Huynh rx_fifo_depth); 1738e598769STin Huynh } 1748e598769STin Huynh } 1758e598769STin Huynh 1766ad6fde3SJarkko Nikula static int dw_i2c_plat_probe(struct platform_device *pdev) 1772373f6b9SDirk Brandewie { 1784c5301abSMika Westerberg struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); 1792373f6b9SDirk Brandewie struct dw_i2c_dev *dev; 1802373f6b9SDirk Brandewie struct i2c_adapter *adap; 1811cb715caSAndy Shevchenko struct resource *mem; 1822373f6b9SDirk Brandewie int irq, r; 18310f8e7fbSJarkko Nikula u32 acpi_speed, ht = 0; 1842373f6b9SDirk Brandewie 1852373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0); 186b20d3864SAlexey Brodkin if (irq < 0) 187b20d3864SAlexey Brodkin return irq; 1882373f6b9SDirk Brandewie 1891cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); 1901cb715caSAndy Shevchenko if (!dev) 1911cb715caSAndy Shevchenko return -ENOMEM; 1922373f6b9SDirk Brandewie 1933cc2d009SWolfram Sang mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1941cb715caSAndy Shevchenko dev->base = devm_ioremap_resource(&pdev->dev, mem); 1951cb715caSAndy Shevchenko if (IS_ERR(dev->base)) 1961cb715caSAndy Shevchenko return PTR_ERR(dev->base); 1972373f6b9SDirk Brandewie 1981cb715caSAndy Shevchenko dev->dev = &pdev->dev; 1992373f6b9SDirk Brandewie dev->irq = irq; 2002373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev); 2012373f6b9SDirk Brandewie 2024c5301abSMika Westerberg if (pdata) { 20319c0a539SWeifeng Voon dev->clk_freq = pdata->i2c_scl_freq; 2044c5301abSMika Westerberg } else { 2054c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "i2c-sda-hold-time-ns", 2064c5301abSMika Westerberg &ht); 2074c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "i2c-sda-falling-time-ns", 2086468276bSRomain Baeriswyl &dev->sda_falling_time); 2094c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "i2c-scl-falling-time-ns", 2106468276bSRomain Baeriswyl &dev->scl_falling_time); 2114c5301abSMika Westerberg device_property_read_u32(&pdev->dev, "clock-frequency", 21219c0a539SWeifeng Voon &dev->clk_freq); 2134c5301abSMika Westerberg } 2148e5f6b2aSRomain Baeriswyl 21510f8e7fbSJarkko Nikula acpi_speed = i2c_acpi_find_bus_speed(&pdev->dev); 216973652dbSJarkko Nikula /* 217973652dbSJarkko Nikula * Find bus speed from the "clock-frequency" device property, ACPI 218973652dbSJarkko Nikula * or by using fast mode if neither is set. 219973652dbSJarkko Nikula */ 220973652dbSJarkko Nikula if (acpi_speed && dev->clk_freq) 221973652dbSJarkko Nikula dev->clk_freq = min(dev->clk_freq, acpi_speed); 222973652dbSJarkko Nikula else if (acpi_speed || dev->clk_freq) 223973652dbSJarkko Nikula dev->clk_freq = max(dev->clk_freq, acpi_speed); 224973652dbSJarkko Nikula else 225973652dbSJarkko Nikula dev->clk_freq = 400000; 22610f8e7fbSJarkko Nikula 2274c5301abSMika Westerberg if (has_acpi_companion(&pdev->dev)) 2284c5301abSMika Westerberg dw_i2c_acpi_configure(pdev); 2294c5301abSMika Westerberg 2304c5301abSMika Westerberg /* 231d608c3d9SWeifeng Voon * Only standard mode at 100kHz, fast mode at 400kHz, 232b6e67145SWeifeng Voon * fast mode plus at 1MHz and high speed mode at 3.4MHz are supported. 2338e5f6b2aSRomain Baeriswyl */ 234d608c3d9SWeifeng Voon if (dev->clk_freq != 100000 && dev->clk_freq != 400000 235b6e67145SWeifeng Voon && dev->clk_freq != 1000000 && dev->clk_freq != 3400000) { 236d608c3d9SWeifeng Voon dev_err(&pdev->dev, 237b6e67145SWeifeng Voon "Only 100kHz, 400kHz, 1MHz and 3.4MHz supported"); 2388e5f6b2aSRomain Baeriswyl return -EINVAL; 2398e5f6b2aSRomain Baeriswyl } 2409803f868SChristian Ruppert 241086cb4afSHans de Goede r = i2c_dw_probe_lock_support(dev); 242894acb2fSDavid Box if (r) 243894acb2fSDavid Box return r; 244894acb2fSDavid Box 245f06122f0SAlexander Stein dev->functionality = I2C_FUNC_10BIT_ADDR | DW_IC_DEFAULT_FUNCTIONALITY; 246548e6695SWeifeng Voon 247548e6695SWeifeng Voon dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | 248548e6695SWeifeng Voon DW_IC_CON_RESTART_EN; 249548e6695SWeifeng Voon 250b6e67145SWeifeng Voon switch (dev->clk_freq) { 251b6e67145SWeifeng Voon case 100000: 252548e6695SWeifeng Voon dev->master_cfg |= DW_IC_CON_SPEED_STD; 253b6e67145SWeifeng Voon break; 254b6e67145SWeifeng Voon case 3400000: 255b6e67145SWeifeng Voon dev->master_cfg |= DW_IC_CON_SPEED_HIGH; 256b6e67145SWeifeng Voon break; 257b6e67145SWeifeng Voon default: 258548e6695SWeifeng Voon dev->master_cfg |= DW_IC_CON_SPEED_FAST; 259b6e67145SWeifeng Voon } 2602fa8326bSDirk Brandewie 261925ddb24SMika Westerberg dev->clk = devm_clk_get(&pdev->dev, NULL); 262b33af11dSSuravee Suthikulpanit if (!i2c_dw_plat_prepare_clk(dev, true)) { 263925ddb24SMika Westerberg dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; 264925ddb24SMika Westerberg 265b33af11dSSuravee Suthikulpanit if (!dev->sda_hold_time && ht) 266b33af11dSSuravee Suthikulpanit dev->sda_hold_time = div_u64( 267b33af11dSSuravee Suthikulpanit (u64)dev->get_clk_rate_khz(dev) * ht + 500000, 268925ddb24SMika Westerberg 1000000); 269925ddb24SMika Westerberg } 270925ddb24SMika Westerberg 2718e598769STin Huynh dw_i2c_set_fifo_size(dev, pdev->id); 2722373f6b9SDirk Brandewie 2732373f6b9SDirk Brandewie adap = &dev->adapter; 2742373f6b9SDirk Brandewie adap->owner = THIS_MODULE; 27570fba830SWolfram Sang adap->class = I2C_CLASS_DEPRECATED; 2768eb5c87aSDustin Byford ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); 277af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node; 2782373f6b9SDirk Brandewie 279894acb2fSDavid Box if (dev->pm_runtime_disabled) { 280894acb2fSDavid Box pm_runtime_forbid(&pdev->dev); 281894acb2fSDavid Box } else { 28243452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); 28343452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev); 2847272194eSMika Westerberg pm_runtime_set_active(&pdev->dev); 2857272194eSMika Westerberg pm_runtime_enable(&pdev->dev); 286894acb2fSDavid Box } 2877272194eSMika Westerberg 288d55fc378SLinus Torvalds r = i2c_dw_probe(dev); 289e79e72c5SJarkko Nikula if (r && !dev->pm_runtime_disabled) 29036d48fb5SWolfram Sang pm_runtime_disable(&pdev->dev); 29136d48fb5SWolfram Sang 292e79e72c5SJarkko Nikula return r; 2932373f6b9SDirk Brandewie } 2942373f6b9SDirk Brandewie 2956ad6fde3SJarkko Nikula static int dw_i2c_plat_remove(struct platform_device *pdev) 2962373f6b9SDirk Brandewie { 2972373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 2982373f6b9SDirk Brandewie 2997272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev); 3007272194eSMika Westerberg 3012373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter); 3022373f6b9SDirk Brandewie 303f3fa9f3dSDirk Brandewie i2c_dw_disable(dev); 3042373f6b9SDirk Brandewie 305edfc3901SMika Westerberg pm_runtime_dont_use_autosuspend(&pdev->dev); 306edfc3901SMika Westerberg pm_runtime_put_sync(&pdev->dev); 307e79e72c5SJarkko Nikula if (!dev->pm_runtime_disabled) 3087272194eSMika Westerberg pm_runtime_disable(&pdev->dev); 3097272194eSMika Westerberg 310086cb4afSHans de Goede i2c_dw_remove_lock_support(dev); 311086cb4afSHans de Goede 3122373f6b9SDirk Brandewie return 0; 3132373f6b9SDirk Brandewie } 3142373f6b9SDirk Brandewie 315af71100cSRob Herring #ifdef CONFIG_OF 316af71100cSRob Herring static const struct of_device_id dw_i2c_of_match[] = { 317af71100cSRob Herring { .compatible = "snps,designware-i2c", }, 318af71100cSRob Herring {}, 319af71100cSRob Herring }; 320af71100cSRob Herring MODULE_DEVICE_TABLE(of, dw_i2c_of_match); 321af71100cSRob Herring #endif 322af71100cSRob Herring 3238503ff16SJisheng Zhang #ifdef CONFIG_PM_SLEEP 3246ad6fde3SJarkko Nikula static int dw_i2c_plat_prepare(struct device *dev) 3258503ff16SJisheng Zhang { 3268503ff16SJisheng Zhang return pm_runtime_suspended(dev); 3278503ff16SJisheng Zhang } 3288503ff16SJisheng Zhang 3296ad6fde3SJarkko Nikula static void dw_i2c_plat_complete(struct device *dev) 3308503ff16SJisheng Zhang { 3318503ff16SJisheng Zhang if (dev->power.direct_complete) 3328503ff16SJisheng Zhang pm_request_resume(dev); 3338503ff16SJisheng Zhang } 3348503ff16SJisheng Zhang #else 335319d7f05SJarkko Nikula #define dw_i2c_plat_prepare NULL 336319d7f05SJarkko Nikula #define dw_i2c_plat_complete NULL 3378503ff16SJisheng Zhang #endif 3388503ff16SJisheng Zhang 3391fc2fe20SMika Westerberg #ifdef CONFIG_PM 3406ad6fde3SJarkko Nikula static int dw_i2c_plat_suspend(struct device *dev) 3413bf3b289SDeepak Sikri { 3423bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3433bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3443bf3b289SDeepak Sikri 345f537295aSMika Westerberg i2c_dw_disable(i_dev); 346b33af11dSSuravee Suthikulpanit i2c_dw_plat_prepare_clk(i_dev, false); 3473bf3b289SDeepak Sikri 3483bf3b289SDeepak Sikri return 0; 3493bf3b289SDeepak Sikri } 3503bf3b289SDeepak Sikri 3516ad6fde3SJarkko Nikula static int dw_i2c_plat_resume(struct device *dev) 3523bf3b289SDeepak Sikri { 3533bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3543bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3553bf3b289SDeepak Sikri 356b33af11dSSuravee Suthikulpanit i2c_dw_plat_prepare_clk(i_dev, true); 357894acb2fSDavid Box 358894acb2fSDavid Box if (!i_dev->pm_runtime_disabled) 3593bf3b289SDeepak Sikri i2c_dw_init(i_dev); 3603bf3b289SDeepak Sikri 3613bf3b289SDeepak Sikri return 0; 3623bf3b289SDeepak Sikri } 3633bf3b289SDeepak Sikri 3648503ff16SJisheng Zhang static const struct dev_pm_ops dw_i2c_dev_pm_ops = { 3656ad6fde3SJarkko Nikula .prepare = dw_i2c_plat_prepare, 3666ad6fde3SJarkko Nikula .complete = dw_i2c_plat_complete, 3676ad6fde3SJarkko Nikula SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume) 3686ad6fde3SJarkko Nikula SET_RUNTIME_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume, NULL) 3698503ff16SJisheng Zhang }; 3708503ff16SJisheng Zhang 3718503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops) 3728503ff16SJisheng Zhang #else 3738503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS NULL 3748503ff16SJisheng Zhang #endif 3751fc2fe20SMika Westerberg 3762373f6b9SDirk Brandewie /* work with hotplug and coldplug */ 3772373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware"); 3782373f6b9SDirk Brandewie 3792373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = { 3806ad6fde3SJarkko Nikula .probe = dw_i2c_plat_probe, 3816ad6fde3SJarkko Nikula .remove = dw_i2c_plat_remove, 3822373f6b9SDirk Brandewie .driver = { 3832373f6b9SDirk Brandewie .name = "i2c_designware", 384af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match), 385b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), 3868503ff16SJisheng Zhang .pm = DW_I2C_DEV_PMOPS, 3872373f6b9SDirk Brandewie }, 3882373f6b9SDirk Brandewie }; 3892373f6b9SDirk Brandewie 3902373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void) 3912373f6b9SDirk Brandewie { 392cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver); 3932373f6b9SDirk Brandewie } 39410452280SPratyush Anand subsys_initcall(dw_i2c_init_driver); 3952373f6b9SDirk Brandewie 3962373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void) 3972373f6b9SDirk Brandewie { 3982373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver); 3992373f6b9SDirk Brandewie } 4002373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver); 4012373f6b9SDirk Brandewie 4022373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); 4032373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); 4042373f6b9SDirk Brandewie MODULE_LICENSE("GPL"); 405