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> 392373f6b9SDirk Brandewie #include <linux/io.h> 402373f6b9SDirk Brandewie #include <linux/slab.h> 41b61b1415SMika Westerberg #include <linux/acpi.h> 424bcfda09STan, Raymond #include <linux/platform_data/i2c-designware.h> 432373f6b9SDirk Brandewie #include "i2c-designware-core.h" 442373f6b9SDirk Brandewie 451d31b58fSDirk Brandewie static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 461d31b58fSDirk Brandewie { 471d31b58fSDirk Brandewie return clk_get_rate(dev->clk)/1000; 481d31b58fSDirk Brandewie } 492373f6b9SDirk Brandewie 50b61b1415SMika Westerberg #ifdef CONFIG_ACPI 5156d4b8a2SMika Westerberg /* 5256d4b8a2SMika Westerberg * The HCNT/LCNT information coming from ACPI should be the most accurate 5356d4b8a2SMika Westerberg * for given platform. However, some systems get it wrong. On such systems 5456d4b8a2SMika Westerberg * we get better results by calculating those based on the input clock. 5556d4b8a2SMika Westerberg */ 5656d4b8a2SMika Westerberg static const struct dmi_system_id dw_i2c_no_acpi_params[] = { 5756d4b8a2SMika Westerberg { 5856d4b8a2SMika Westerberg .ident = "Dell Inspiron 7348", 5956d4b8a2SMika Westerberg .matches = { 6056d4b8a2SMika Westerberg DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 6156d4b8a2SMika Westerberg DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7348"), 6256d4b8a2SMika Westerberg }, 6356d4b8a2SMika Westerberg }, 6456d4b8a2SMika Westerberg { } 6556d4b8a2SMika Westerberg }; 6656d4b8a2SMika Westerberg 6757cd1e30SMika Westerberg static void dw_i2c_acpi_params(struct platform_device *pdev, char method[], 6857cd1e30SMika Westerberg u16 *hcnt, u16 *lcnt, u32 *sda_hold) 6957cd1e30SMika Westerberg { 7057cd1e30SMika Westerberg struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; 7157cd1e30SMika Westerberg acpi_handle handle = ACPI_HANDLE(&pdev->dev); 7257cd1e30SMika Westerberg union acpi_object *obj; 7357cd1e30SMika Westerberg 7456d4b8a2SMika Westerberg if (dmi_check_system(dw_i2c_no_acpi_params)) 7556d4b8a2SMika Westerberg return; 7656d4b8a2SMika Westerberg 7757cd1e30SMika Westerberg if (ACPI_FAILURE(acpi_evaluate_object(handle, method, NULL, &buf))) 7857cd1e30SMika Westerberg return; 7957cd1e30SMika Westerberg 8057cd1e30SMika Westerberg obj = (union acpi_object *)buf.pointer; 8157cd1e30SMika Westerberg if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 3) { 8257cd1e30SMika Westerberg const union acpi_object *objs = obj->package.elements; 8357cd1e30SMika Westerberg 8457cd1e30SMika Westerberg *hcnt = (u16)objs[0].integer.value; 8557cd1e30SMika Westerberg *lcnt = (u16)objs[1].integer.value; 8657cd1e30SMika Westerberg if (sda_hold) 8757cd1e30SMika Westerberg *sda_hold = (u32)objs[2].integer.value; 8857cd1e30SMika Westerberg } 8957cd1e30SMika Westerberg 9057cd1e30SMika Westerberg kfree(buf.pointer); 9157cd1e30SMika Westerberg } 9257cd1e30SMika Westerberg 93b61b1415SMika Westerberg static int dw_i2c_acpi_configure(struct platform_device *pdev) 94b61b1415SMika Westerberg { 95b61b1415SMika Westerberg struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 96b61b1415SMika Westerberg 97b61b1415SMika Westerberg dev->adapter.nr = -1; 98b61b1415SMika Westerberg dev->tx_fifo_depth = 32; 99b61b1415SMika Westerberg dev->rx_fifo_depth = 32; 10057cd1e30SMika Westerberg 10157cd1e30SMika Westerberg /* 10257cd1e30SMika Westerberg * Try to get SDA hold time and *CNT values from an ACPI method if 10357cd1e30SMika Westerberg * it exists for both supported speed modes. 10457cd1e30SMika Westerberg */ 1050b26c845SMika Westerberg dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, NULL); 10657cd1e30SMika Westerberg dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, 1070b26c845SMika Westerberg &dev->sda_hold_time); 10857cd1e30SMika Westerberg 109b61b1415SMika Westerberg return 0; 110b61b1415SMika Westerberg } 111b61b1415SMika Westerberg 112b61b1415SMika Westerberg static const struct acpi_device_id dw_i2c_acpi_match[] = { 113b61b1415SMika Westerberg { "INT33C2", 0 }, 114b61b1415SMika Westerberg { "INT33C3", 0 }, 11525b3dfc8SMika Westerberg { "INT3432", 0 }, 11625b3dfc8SMika Westerberg { "INT3433", 0 }, 1175a7e6bd8SMika Westerberg { "80860F41", 0 }, 1180409516aSAlan Cox { "808622C1", 0 }, 1193eddad96SKen Xue { "AMD0010", 0 }, 12090708ce2SSuravee Suthikulpanit { "AMDI0510", 0 }, 121b61b1415SMika Westerberg { } 122b61b1415SMika Westerberg }; 123b61b1415SMika Westerberg MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); 124b61b1415SMika Westerberg #else 125b61b1415SMika Westerberg static inline int dw_i2c_acpi_configure(struct platform_device *pdev) 126b61b1415SMika Westerberg { 127b61b1415SMika Westerberg return -ENODEV; 128b61b1415SMika Westerberg } 129b61b1415SMika Westerberg #endif 130b61b1415SMika Westerberg 131b33af11dSSuravee Suthikulpanit static int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare) 132b33af11dSSuravee Suthikulpanit { 133b33af11dSSuravee Suthikulpanit if (IS_ERR(i_dev->clk)) 134b33af11dSSuravee Suthikulpanit return PTR_ERR(i_dev->clk); 135b33af11dSSuravee Suthikulpanit 136b33af11dSSuravee Suthikulpanit if (prepare) 137b33af11dSSuravee Suthikulpanit return clk_prepare_enable(i_dev->clk); 138b33af11dSSuravee Suthikulpanit 139b33af11dSSuravee Suthikulpanit clk_disable_unprepare(i_dev->clk); 140b33af11dSSuravee Suthikulpanit return 0; 141b33af11dSSuravee Suthikulpanit } 142b33af11dSSuravee Suthikulpanit 1436ad6fde3SJarkko Nikula static int dw_i2c_plat_probe(struct platform_device *pdev) 1442373f6b9SDirk Brandewie { 1452373f6b9SDirk Brandewie struct dw_i2c_dev *dev; 1462373f6b9SDirk Brandewie struct i2c_adapter *adap; 1471cb715caSAndy Shevchenko struct resource *mem; 1484bcfda09STan, Raymond struct dw_i2c_platform_data *pdata; 1492373f6b9SDirk Brandewie int irq, r; 150925ddb24SMika Westerberg u32 clk_freq, ht = 0; 1512373f6b9SDirk Brandewie 1522373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0); 153b20d3864SAlexey Brodkin if (irq < 0) 154b20d3864SAlexey Brodkin return irq; 1552373f6b9SDirk Brandewie 1561cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); 1571cb715caSAndy Shevchenko if (!dev) 1581cb715caSAndy Shevchenko return -ENOMEM; 1592373f6b9SDirk Brandewie 1603cc2d009SWolfram Sang mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1611cb715caSAndy Shevchenko dev->base = devm_ioremap_resource(&pdev->dev, mem); 1621cb715caSAndy Shevchenko if (IS_ERR(dev->base)) 1631cb715caSAndy Shevchenko return PTR_ERR(dev->base); 1642373f6b9SDirk Brandewie 1651cb715caSAndy Shevchenko dev->dev = &pdev->dev; 1662373f6b9SDirk Brandewie dev->irq = irq; 1672373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev); 1682373f6b9SDirk Brandewie 1698e5f6b2aSRomain Baeriswyl /* fast mode by default because of legacy reasons */ 1708e5f6b2aSRomain Baeriswyl clk_freq = 400000; 1718e5f6b2aSRomain Baeriswyl 172ca5b74d2SRafael J. Wysocki if (has_acpi_companion(&pdev->dev)) { 173925ddb24SMika Westerberg dw_i2c_acpi_configure(pdev); 174925ddb24SMika Westerberg } else if (pdev->dev.of_node) { 1759803f868SChristian Ruppert of_property_read_u32(pdev->dev.of_node, 1769803f868SChristian Ruppert "i2c-sda-hold-time-ns", &ht); 1776468276bSRomain Baeriswyl 1786468276bSRomain Baeriswyl of_property_read_u32(pdev->dev.of_node, 1796468276bSRomain Baeriswyl "i2c-sda-falling-time-ns", 1806468276bSRomain Baeriswyl &dev->sda_falling_time); 1816468276bSRomain Baeriswyl of_property_read_u32(pdev->dev.of_node, 1826468276bSRomain Baeriswyl "i2c-scl-falling-time-ns", 1836468276bSRomain Baeriswyl &dev->scl_falling_time); 1848e5f6b2aSRomain Baeriswyl 1858e5f6b2aSRomain Baeriswyl of_property_read_u32(pdev->dev.of_node, "clock-frequency", 1868e5f6b2aSRomain Baeriswyl &clk_freq); 1878e5f6b2aSRomain Baeriswyl 1888e5f6b2aSRomain Baeriswyl /* Only standard mode at 100kHz and fast mode at 400kHz 1898e5f6b2aSRomain Baeriswyl * are supported. 1908e5f6b2aSRomain Baeriswyl */ 1918e5f6b2aSRomain Baeriswyl if (clk_freq != 100000 && clk_freq != 400000) { 1928e5f6b2aSRomain Baeriswyl dev_err(&pdev->dev, "Only 100kHz and 400kHz supported"); 1938e5f6b2aSRomain Baeriswyl return -EINVAL; 1948e5f6b2aSRomain Baeriswyl } 1954bcfda09STan, Raymond } else { 1964bcfda09STan, Raymond pdata = dev_get_platdata(&pdev->dev); 1974bcfda09STan, Raymond if (pdata) 1984bcfda09STan, Raymond clk_freq = pdata->i2c_scl_freq; 1999803f868SChristian Ruppert } 2009803f868SChristian Ruppert 201894acb2fSDavid Box r = i2c_dw_eval_lock_support(dev); 202894acb2fSDavid Box if (r) 203894acb2fSDavid Box return r; 204894acb2fSDavid Box 2052fa8326bSDirk Brandewie dev->functionality = 2062fa8326bSDirk Brandewie I2C_FUNC_I2C | 2072fa8326bSDirk Brandewie I2C_FUNC_10BIT_ADDR | 2082fa8326bSDirk Brandewie I2C_FUNC_SMBUS_BYTE | 2092fa8326bSDirk Brandewie I2C_FUNC_SMBUS_BYTE_DATA | 2102fa8326bSDirk Brandewie I2C_FUNC_SMBUS_WORD_DATA | 2112fa8326bSDirk Brandewie I2C_FUNC_SMBUS_I2C_BLOCK; 2128e5f6b2aSRomain Baeriswyl if (clk_freq == 100000) 2138e5f6b2aSRomain Baeriswyl dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | 2148e5f6b2aSRomain Baeriswyl DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_STD; 2158e5f6b2aSRomain Baeriswyl else 216e18563fcSDirk Brandewie dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | 217e18563fcSDirk Brandewie DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_FAST; 2182fa8326bSDirk Brandewie 219925ddb24SMika Westerberg dev->clk = devm_clk_get(&pdev->dev, NULL); 220b33af11dSSuravee Suthikulpanit if (!i2c_dw_plat_prepare_clk(dev, true)) { 221925ddb24SMika Westerberg dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; 222925ddb24SMika Westerberg 223b33af11dSSuravee Suthikulpanit if (!dev->sda_hold_time && ht) 224b33af11dSSuravee Suthikulpanit dev->sda_hold_time = div_u64( 225b33af11dSSuravee Suthikulpanit (u64)dev->get_clk_rate_khz(dev) * ht + 500000, 226925ddb24SMika Westerberg 1000000); 227925ddb24SMika Westerberg } 228925ddb24SMika Westerberg 229925ddb24SMika Westerberg if (!dev->tx_fifo_depth) { 230f3fa9f3dSDirk Brandewie u32 param1 = i2c_dw_read_comp_param(dev); 2312373f6b9SDirk Brandewie 2322373f6b9SDirk Brandewie dev->tx_fifo_depth = ((param1 >> 16) & 0xff) + 1; 2332373f6b9SDirk Brandewie dev->rx_fifo_depth = ((param1 >> 8) & 0xff) + 1; 234b61b1415SMika Westerberg dev->adapter.nr = pdev->id; 2352373f6b9SDirk Brandewie } 2362373f6b9SDirk Brandewie 2372373f6b9SDirk Brandewie adap = &dev->adapter; 2382373f6b9SDirk Brandewie adap->owner = THIS_MODULE; 23970fba830SWolfram Sang adap->class = I2C_CLASS_DEPRECATED; 2408eb5c87aSDustin Byford ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); 241af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node; 2422373f6b9SDirk Brandewie 243894acb2fSDavid Box if (dev->pm_runtime_disabled) { 244894acb2fSDavid Box pm_runtime_forbid(&pdev->dev); 245894acb2fSDavid Box } else { 24643452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); 24743452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev); 2487272194eSMika Westerberg pm_runtime_set_active(&pdev->dev); 2497272194eSMika Westerberg pm_runtime_enable(&pdev->dev); 250894acb2fSDavid Box } 2517272194eSMika Westerberg 252d55fc378SLinus Torvalds r = i2c_dw_probe(dev); 25336d48fb5SWolfram Sang if (r) { 25436d48fb5SWolfram Sang pm_runtime_disable(&pdev->dev); 25536d48fb5SWolfram Sang return r; 25636d48fb5SWolfram Sang } 25736d48fb5SWolfram Sang 2582373f6b9SDirk Brandewie return 0; 2592373f6b9SDirk Brandewie } 2602373f6b9SDirk Brandewie 2616ad6fde3SJarkko Nikula static int dw_i2c_plat_remove(struct platform_device *pdev) 2622373f6b9SDirk Brandewie { 2632373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 2642373f6b9SDirk Brandewie 2657272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev); 2667272194eSMika Westerberg 2672373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter); 2682373f6b9SDirk Brandewie 269f3fa9f3dSDirk Brandewie i2c_dw_disable(dev); 2702373f6b9SDirk Brandewie 271edfc3901SMika Westerberg pm_runtime_dont_use_autosuspend(&pdev->dev); 272edfc3901SMika Westerberg pm_runtime_put_sync(&pdev->dev); 2737272194eSMika Westerberg pm_runtime_disable(&pdev->dev); 2747272194eSMika Westerberg 2752373f6b9SDirk Brandewie return 0; 2762373f6b9SDirk Brandewie } 2772373f6b9SDirk Brandewie 278af71100cSRob Herring #ifdef CONFIG_OF 279af71100cSRob Herring static const struct of_device_id dw_i2c_of_match[] = { 280af71100cSRob Herring { .compatible = "snps,designware-i2c", }, 281af71100cSRob Herring {}, 282af71100cSRob Herring }; 283af71100cSRob Herring MODULE_DEVICE_TABLE(of, dw_i2c_of_match); 284af71100cSRob Herring #endif 285af71100cSRob Herring 2868503ff16SJisheng Zhang #ifdef CONFIG_PM_SLEEP 2876ad6fde3SJarkko Nikula static int dw_i2c_plat_prepare(struct device *dev) 2888503ff16SJisheng Zhang { 2898503ff16SJisheng Zhang return pm_runtime_suspended(dev); 2908503ff16SJisheng Zhang } 2918503ff16SJisheng Zhang 2926ad6fde3SJarkko Nikula static void dw_i2c_plat_complete(struct device *dev) 2938503ff16SJisheng Zhang { 2948503ff16SJisheng Zhang if (dev->power.direct_complete) 2958503ff16SJisheng Zhang pm_request_resume(dev); 2968503ff16SJisheng Zhang } 2978503ff16SJisheng Zhang #else 298319d7f05SJarkko Nikula #define dw_i2c_plat_prepare NULL 299319d7f05SJarkko Nikula #define dw_i2c_plat_complete NULL 3008503ff16SJisheng Zhang #endif 3018503ff16SJisheng Zhang 3021fc2fe20SMika Westerberg #ifdef CONFIG_PM 3036ad6fde3SJarkko Nikula static int dw_i2c_plat_suspend(struct device *dev) 3043bf3b289SDeepak Sikri { 3053bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3063bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3073bf3b289SDeepak Sikri 308f537295aSMika Westerberg i2c_dw_disable(i_dev); 309b33af11dSSuravee Suthikulpanit i2c_dw_plat_prepare_clk(i_dev, false); 3103bf3b289SDeepak Sikri 3113bf3b289SDeepak Sikri return 0; 3123bf3b289SDeepak Sikri } 3133bf3b289SDeepak Sikri 3146ad6fde3SJarkko Nikula static int dw_i2c_plat_resume(struct device *dev) 3153bf3b289SDeepak Sikri { 3163bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3173bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3183bf3b289SDeepak Sikri 319b33af11dSSuravee Suthikulpanit i2c_dw_plat_prepare_clk(i_dev, true); 320894acb2fSDavid Box 321894acb2fSDavid Box if (!i_dev->pm_runtime_disabled) 3223bf3b289SDeepak Sikri i2c_dw_init(i_dev); 3233bf3b289SDeepak Sikri 3243bf3b289SDeepak Sikri return 0; 3253bf3b289SDeepak Sikri } 3263bf3b289SDeepak Sikri 3278503ff16SJisheng Zhang static const struct dev_pm_ops dw_i2c_dev_pm_ops = { 3286ad6fde3SJarkko Nikula .prepare = dw_i2c_plat_prepare, 3296ad6fde3SJarkko Nikula .complete = dw_i2c_plat_complete, 3306ad6fde3SJarkko Nikula SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume) 3316ad6fde3SJarkko Nikula SET_RUNTIME_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume, NULL) 3328503ff16SJisheng Zhang }; 3338503ff16SJisheng Zhang 3348503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops) 3358503ff16SJisheng Zhang #else 3368503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS NULL 3378503ff16SJisheng Zhang #endif 3381fc2fe20SMika Westerberg 3392373f6b9SDirk Brandewie /* work with hotplug and coldplug */ 3402373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware"); 3412373f6b9SDirk Brandewie 3422373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = { 3436ad6fde3SJarkko Nikula .probe = dw_i2c_plat_probe, 3446ad6fde3SJarkko Nikula .remove = dw_i2c_plat_remove, 3452373f6b9SDirk Brandewie .driver = { 3462373f6b9SDirk Brandewie .name = "i2c_designware", 347af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match), 348b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), 3498503ff16SJisheng Zhang .pm = DW_I2C_DEV_PMOPS, 3502373f6b9SDirk Brandewie }, 3512373f6b9SDirk Brandewie }; 3522373f6b9SDirk Brandewie 3532373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void) 3542373f6b9SDirk Brandewie { 355cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver); 3562373f6b9SDirk Brandewie } 35710452280SPratyush Anand subsys_initcall(dw_i2c_init_driver); 3582373f6b9SDirk Brandewie 3592373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void) 3602373f6b9SDirk Brandewie { 3612373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver); 3622373f6b9SDirk Brandewie } 3632373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver); 3642373f6b9SDirk Brandewie 3652373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); 3662373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); 3672373f6b9SDirk Brandewie MODULE_LICENSE("GPL"); 368