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> 272373f6b9SDirk Brandewie #include <linux/i2c.h> 282373f6b9SDirk Brandewie #include <linux/clk.h> 29a445900cSCarl Peng #include <linux/clk-provider.h> 302373f6b9SDirk Brandewie #include <linux/errno.h> 312373f6b9SDirk Brandewie #include <linux/sched.h> 322373f6b9SDirk Brandewie #include <linux/err.h> 332373f6b9SDirk Brandewie #include <linux/interrupt.h> 349803f868SChristian Ruppert #include <linux/of.h> 352373f6b9SDirk Brandewie #include <linux/platform_device.h> 363bf3b289SDeepak Sikri #include <linux/pm.h> 377272194eSMika Westerberg #include <linux/pm_runtime.h> 382373f6b9SDirk Brandewie #include <linux/io.h> 392373f6b9SDirk Brandewie #include <linux/slab.h> 40b61b1415SMika Westerberg #include <linux/acpi.h> 414bcfda09STan, Raymond #include <linux/platform_data/i2c-designware.h> 422373f6b9SDirk Brandewie #include "i2c-designware-core.h" 432373f6b9SDirk Brandewie 442373f6b9SDirk Brandewie static struct i2c_algorithm i2c_dw_algo = { 452373f6b9SDirk Brandewie .master_xfer = i2c_dw_xfer, 462373f6b9SDirk Brandewie .functionality = i2c_dw_func, 472373f6b9SDirk Brandewie }; 481d31b58fSDirk Brandewie static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 491d31b58fSDirk Brandewie { 501d31b58fSDirk Brandewie return clk_get_rate(dev->clk)/1000; 511d31b58fSDirk Brandewie } 522373f6b9SDirk Brandewie 53b61b1415SMika Westerberg #ifdef CONFIG_ACPI 5457cd1e30SMika Westerberg static void dw_i2c_acpi_params(struct platform_device *pdev, char method[], 5557cd1e30SMika Westerberg u16 *hcnt, u16 *lcnt, u32 *sda_hold) 5657cd1e30SMika Westerberg { 5757cd1e30SMika Westerberg struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; 5857cd1e30SMika Westerberg acpi_handle handle = ACPI_HANDLE(&pdev->dev); 5957cd1e30SMika Westerberg union acpi_object *obj; 6057cd1e30SMika Westerberg 6157cd1e30SMika Westerberg if (ACPI_FAILURE(acpi_evaluate_object(handle, method, NULL, &buf))) 6257cd1e30SMika Westerberg return; 6357cd1e30SMika Westerberg 6457cd1e30SMika Westerberg obj = (union acpi_object *)buf.pointer; 6557cd1e30SMika Westerberg if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 3) { 6657cd1e30SMika Westerberg const union acpi_object *objs = obj->package.elements; 6757cd1e30SMika Westerberg 6857cd1e30SMika Westerberg *hcnt = (u16)objs[0].integer.value; 6957cd1e30SMika Westerberg *lcnt = (u16)objs[1].integer.value; 7057cd1e30SMika Westerberg if (sda_hold) 7157cd1e30SMika Westerberg *sda_hold = (u32)objs[2].integer.value; 7257cd1e30SMika Westerberg } 7357cd1e30SMika Westerberg 7457cd1e30SMika Westerberg kfree(buf.pointer); 7557cd1e30SMika Westerberg } 7657cd1e30SMika Westerberg 77b61b1415SMika Westerberg static int dw_i2c_acpi_configure(struct platform_device *pdev) 78b61b1415SMika Westerberg { 79b61b1415SMika Westerberg struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 80a445900cSCarl Peng const struct acpi_device_id *id; 81b61b1415SMika Westerberg 82b61b1415SMika Westerberg dev->adapter.nr = -1; 83b61b1415SMika Westerberg dev->tx_fifo_depth = 32; 84b61b1415SMika Westerberg dev->rx_fifo_depth = 32; 8557cd1e30SMika Westerberg 8657cd1e30SMika Westerberg /* 8757cd1e30SMika Westerberg * Try to get SDA hold time and *CNT values from an ACPI method if 8857cd1e30SMika Westerberg * it exists for both supported speed modes. 8957cd1e30SMika Westerberg */ 900b26c845SMika Westerberg dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, NULL); 9157cd1e30SMika Westerberg dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, 920b26c845SMika Westerberg &dev->sda_hold_time); 9357cd1e30SMika Westerberg 94a445900cSCarl Peng /* 95a445900cSCarl Peng * Provide a way for Designware I2C host controllers that are not 96a445900cSCarl Peng * based on Intel LPSS to specify their input clock frequency via 97a445900cSCarl Peng * id->driver_data. 98a445900cSCarl Peng */ 99a445900cSCarl Peng id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); 100a445900cSCarl Peng if (id && id->driver_data) 101a445900cSCarl Peng clk_register_fixed_rate(&pdev->dev, dev_name(&pdev->dev), NULL, 102a445900cSCarl Peng CLK_IS_ROOT, id->driver_data); 103a445900cSCarl Peng 104b61b1415SMika Westerberg return 0; 105b61b1415SMika Westerberg } 106b61b1415SMika Westerberg 107a445900cSCarl Peng static void dw_i2c_acpi_unconfigure(struct platform_device *pdev) 108a445900cSCarl Peng { 109a445900cSCarl Peng struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 110a445900cSCarl Peng const struct acpi_device_id *id; 111a445900cSCarl Peng 112a445900cSCarl Peng id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); 113a445900cSCarl Peng if (id && id->driver_data) 114a445900cSCarl Peng clk_unregister(dev->clk); 115a445900cSCarl Peng } 116a445900cSCarl Peng 117b61b1415SMika Westerberg static const struct acpi_device_id dw_i2c_acpi_match[] = { 118b61b1415SMika Westerberg { "INT33C2", 0 }, 119b61b1415SMika Westerberg { "INT33C3", 0 }, 12025b3dfc8SMika Westerberg { "INT3432", 0 }, 12125b3dfc8SMika Westerberg { "INT3433", 0 }, 1225a7e6bd8SMika Westerberg { "80860F41", 0 }, 1230409516aSAlan Cox { "808622C1", 0 }, 124a445900cSCarl Peng { "AMD0010", 133 * 1000 * 1000 }, 125b61b1415SMika Westerberg { } 126b61b1415SMika Westerberg }; 127b61b1415SMika Westerberg MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); 128b61b1415SMika Westerberg #else 129b61b1415SMika Westerberg static inline int dw_i2c_acpi_configure(struct platform_device *pdev) 130b61b1415SMika Westerberg { 131b61b1415SMika Westerberg return -ENODEV; 132b61b1415SMika Westerberg } 133a445900cSCarl Peng static inline void dw_i2c_acpi_unconfigure(struct platform_device *pdev) { } 134b61b1415SMika Westerberg #endif 135b61b1415SMika Westerberg 1360b255e92SBill Pemberton static int dw_i2c_probe(struct platform_device *pdev) 1372373f6b9SDirk Brandewie { 1382373f6b9SDirk Brandewie struct dw_i2c_dev *dev; 1392373f6b9SDirk Brandewie struct i2c_adapter *adap; 1401cb715caSAndy Shevchenko struct resource *mem; 1414bcfda09STan, Raymond struct dw_i2c_platform_data *pdata; 1422373f6b9SDirk Brandewie int irq, r; 143925ddb24SMika Westerberg u32 clk_freq, ht = 0; 1442373f6b9SDirk Brandewie 1452373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0); 1462373f6b9SDirk Brandewie if (irq < 0) { 1472373f6b9SDirk Brandewie dev_err(&pdev->dev, "no irq resource?\n"); 1482373f6b9SDirk Brandewie return irq; /* -ENXIO */ 1492373f6b9SDirk Brandewie } 1502373f6b9SDirk Brandewie 1511cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); 1521cb715caSAndy Shevchenko if (!dev) 1531cb715caSAndy Shevchenko return -ENOMEM; 1542373f6b9SDirk Brandewie 1553cc2d009SWolfram Sang mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1561cb715caSAndy Shevchenko dev->base = devm_ioremap_resource(&pdev->dev, mem); 1571cb715caSAndy Shevchenko if (IS_ERR(dev->base)) 1581cb715caSAndy Shevchenko return PTR_ERR(dev->base); 1592373f6b9SDirk Brandewie 1602373f6b9SDirk Brandewie init_completion(&dev->cmd_complete); 1612373f6b9SDirk Brandewie mutex_init(&dev->lock); 1621cb715caSAndy Shevchenko dev->dev = &pdev->dev; 1632373f6b9SDirk Brandewie dev->irq = irq; 1642373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev); 1652373f6b9SDirk Brandewie 1668e5f6b2aSRomain Baeriswyl /* fast mode by default because of legacy reasons */ 1678e5f6b2aSRomain Baeriswyl clk_freq = 400000; 1688e5f6b2aSRomain Baeriswyl 169ca5b74d2SRafael J. Wysocki if (has_acpi_companion(&pdev->dev)) { 170925ddb24SMika Westerberg dw_i2c_acpi_configure(pdev); 171925ddb24SMika Westerberg } else if (pdev->dev.of_node) { 1729803f868SChristian Ruppert of_property_read_u32(pdev->dev.of_node, 1739803f868SChristian Ruppert "i2c-sda-hold-time-ns", &ht); 1746468276bSRomain Baeriswyl 1756468276bSRomain Baeriswyl of_property_read_u32(pdev->dev.of_node, 1766468276bSRomain Baeriswyl "i2c-sda-falling-time-ns", 1776468276bSRomain Baeriswyl &dev->sda_falling_time); 1786468276bSRomain Baeriswyl of_property_read_u32(pdev->dev.of_node, 1796468276bSRomain Baeriswyl "i2c-scl-falling-time-ns", 1806468276bSRomain Baeriswyl &dev->scl_falling_time); 1818e5f6b2aSRomain Baeriswyl 1828e5f6b2aSRomain Baeriswyl of_property_read_u32(pdev->dev.of_node, "clock-frequency", 1838e5f6b2aSRomain Baeriswyl &clk_freq); 1848e5f6b2aSRomain Baeriswyl 1858e5f6b2aSRomain Baeriswyl /* Only standard mode at 100kHz and fast mode at 400kHz 1868e5f6b2aSRomain Baeriswyl * are supported. 1878e5f6b2aSRomain Baeriswyl */ 1888e5f6b2aSRomain Baeriswyl if (clk_freq != 100000 && clk_freq != 400000) { 1898e5f6b2aSRomain Baeriswyl dev_err(&pdev->dev, "Only 100kHz and 400kHz supported"); 1908e5f6b2aSRomain Baeriswyl return -EINVAL; 1918e5f6b2aSRomain Baeriswyl } 1924bcfda09STan, Raymond } else { 1934bcfda09STan, Raymond pdata = dev_get_platdata(&pdev->dev); 1944bcfda09STan, Raymond if (pdata) 1954bcfda09STan, Raymond clk_freq = pdata->i2c_scl_freq; 1969803f868SChristian Ruppert } 1979803f868SChristian Ruppert 198894acb2fSDavid Box r = i2c_dw_eval_lock_support(dev); 199894acb2fSDavid Box if (r) 200894acb2fSDavid Box return r; 201894acb2fSDavid Box 2022fa8326bSDirk Brandewie dev->functionality = 2032fa8326bSDirk Brandewie I2C_FUNC_I2C | 2042fa8326bSDirk Brandewie I2C_FUNC_10BIT_ADDR | 2052fa8326bSDirk Brandewie I2C_FUNC_SMBUS_BYTE | 2062fa8326bSDirk Brandewie I2C_FUNC_SMBUS_BYTE_DATA | 2072fa8326bSDirk Brandewie I2C_FUNC_SMBUS_WORD_DATA | 2082fa8326bSDirk Brandewie I2C_FUNC_SMBUS_I2C_BLOCK; 2098e5f6b2aSRomain Baeriswyl if (clk_freq == 100000) 2108e5f6b2aSRomain Baeriswyl dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | 2118e5f6b2aSRomain Baeriswyl DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_STD; 2128e5f6b2aSRomain Baeriswyl else 213e18563fcSDirk Brandewie dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | 214e18563fcSDirk Brandewie DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_FAST; 2152fa8326bSDirk Brandewie 216925ddb24SMika Westerberg dev->clk = devm_clk_get(&pdev->dev, NULL); 217925ddb24SMika Westerberg dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; 218925ddb24SMika Westerberg if (IS_ERR(dev->clk)) 219925ddb24SMika Westerberg return PTR_ERR(dev->clk); 220925ddb24SMika Westerberg clk_prepare_enable(dev->clk); 221925ddb24SMika Westerberg 222925ddb24SMika Westerberg if (!dev->sda_hold_time && ht) { 223925ddb24SMika Westerberg u32 ic_clk = dev->get_clk_rate_khz(dev); 224925ddb24SMika Westerberg 225925ddb24SMika Westerberg dev->sda_hold_time = div_u64((u64)ic_clk * 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 r = i2c_dw_init(dev); 2372373f6b9SDirk Brandewie if (r) 2381cb715caSAndy Shevchenko return r; 2392373f6b9SDirk Brandewie 240f3fa9f3dSDirk Brandewie i2c_dw_disable_int(dev); 2411cb715caSAndy Shevchenko r = devm_request_irq(&pdev->dev, dev->irq, i2c_dw_isr, IRQF_SHARED, 2421cb715caSAndy Shevchenko pdev->name, dev); 2432373f6b9SDirk Brandewie if (r) { 2442373f6b9SDirk Brandewie dev_err(&pdev->dev, "failure requesting irq %i\n", dev->irq); 2451cb715caSAndy Shevchenko return r; 2462373f6b9SDirk Brandewie } 2472373f6b9SDirk Brandewie 2482373f6b9SDirk Brandewie adap = &dev->adapter; 2492373f6b9SDirk Brandewie i2c_set_adapdata(adap, dev); 2502373f6b9SDirk Brandewie adap->owner = THIS_MODULE; 25170fba830SWolfram Sang adap->class = I2C_CLASS_DEPRECATED; 2522373f6b9SDirk Brandewie strlcpy(adap->name, "Synopsys DesignWare I2C adapter", 2532373f6b9SDirk Brandewie sizeof(adap->name)); 2542373f6b9SDirk Brandewie adap->algo = &i2c_dw_algo; 2552373f6b9SDirk Brandewie adap->dev.parent = &pdev->dev; 256af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node; 2572373f6b9SDirk Brandewie 2582373f6b9SDirk Brandewie r = i2c_add_numbered_adapter(adap); 2592373f6b9SDirk Brandewie if (r) { 2602373f6b9SDirk Brandewie dev_err(&pdev->dev, "failure adding adapter\n"); 2611cb715caSAndy Shevchenko return r; 2622373f6b9SDirk Brandewie } 2632373f6b9SDirk Brandewie 264894acb2fSDavid Box if (dev->pm_runtime_disabled) { 265894acb2fSDavid Box pm_runtime_forbid(&pdev->dev); 266894acb2fSDavid Box } else { 26743452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); 26843452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev); 2697272194eSMika Westerberg pm_runtime_set_active(&pdev->dev); 2707272194eSMika Westerberg pm_runtime_enable(&pdev->dev); 271894acb2fSDavid Box } 2727272194eSMika Westerberg 2732373f6b9SDirk Brandewie return 0; 2742373f6b9SDirk Brandewie } 2752373f6b9SDirk Brandewie 2760b255e92SBill Pemberton static int dw_i2c_remove(struct platform_device *pdev) 2772373f6b9SDirk Brandewie { 2782373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 2792373f6b9SDirk Brandewie 2807272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev); 2817272194eSMika Westerberg 2822373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter); 2832373f6b9SDirk Brandewie 284f3fa9f3dSDirk Brandewie i2c_dw_disable(dev); 2852373f6b9SDirk Brandewie 2867272194eSMika Westerberg pm_runtime_put(&pdev->dev); 2877272194eSMika Westerberg pm_runtime_disable(&pdev->dev); 2887272194eSMika Westerberg 289ca5b74d2SRafael J. Wysocki if (has_acpi_companion(&pdev->dev)) 290a445900cSCarl Peng dw_i2c_acpi_unconfigure(pdev); 291a445900cSCarl Peng 2922373f6b9SDirk Brandewie return 0; 2932373f6b9SDirk Brandewie } 2942373f6b9SDirk Brandewie 295af71100cSRob Herring #ifdef CONFIG_OF 296af71100cSRob Herring static const struct of_device_id dw_i2c_of_match[] = { 297af71100cSRob Herring { .compatible = "snps,designware-i2c", }, 298af71100cSRob Herring {}, 299af71100cSRob Herring }; 300af71100cSRob Herring MODULE_DEVICE_TABLE(of, dw_i2c_of_match); 301af71100cSRob Herring #endif 302af71100cSRob Herring 3031fc2fe20SMika Westerberg #ifdef CONFIG_PM 3043bf3b289SDeepak Sikri static int dw_i2c_suspend(struct device *dev) 3053bf3b289SDeepak Sikri { 3063bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3073bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3083bf3b289SDeepak Sikri 309f537295aSMika Westerberg i2c_dw_disable(i_dev); 310e1fac69fSViresh Kumar clk_disable_unprepare(i_dev->clk); 3113bf3b289SDeepak Sikri 3123bf3b289SDeepak Sikri return 0; 3133bf3b289SDeepak Sikri } 3143bf3b289SDeepak Sikri 3153bf3b289SDeepak Sikri static int dw_i2c_resume(struct device *dev) 3163bf3b289SDeepak Sikri { 3173bf3b289SDeepak Sikri struct platform_device *pdev = to_platform_device(dev); 3183bf3b289SDeepak Sikri struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); 3193bf3b289SDeepak Sikri 320e1fac69fSViresh Kumar clk_prepare_enable(i_dev->clk); 321894acb2fSDavid Box 322894acb2fSDavid Box if (!i_dev->pm_runtime_disabled) 3233bf3b289SDeepak Sikri i2c_dw_init(i_dev); 3243bf3b289SDeepak Sikri 3253bf3b289SDeepak Sikri return 0; 3263bf3b289SDeepak Sikri } 327dfb03fb2SJingoo Han #endif 3283bf3b289SDeepak Sikri 3291fc2fe20SMika Westerberg static UNIVERSAL_DEV_PM_OPS(dw_i2c_dev_pm_ops, dw_i2c_suspend, 3301fc2fe20SMika Westerberg dw_i2c_resume, NULL); 3311fc2fe20SMika Westerberg 3322373f6b9SDirk Brandewie /* work with hotplug and coldplug */ 3332373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware"); 3342373f6b9SDirk Brandewie 3352373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = { 336cccdcea1SWolfram Sang .probe = dw_i2c_probe, 3370b255e92SBill Pemberton .remove = dw_i2c_remove, 3382373f6b9SDirk Brandewie .driver = { 3392373f6b9SDirk Brandewie .name = "i2c_designware", 340af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match), 341b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), 3421fc2fe20SMika Westerberg .pm = &dw_i2c_dev_pm_ops, 3432373f6b9SDirk Brandewie }, 3442373f6b9SDirk Brandewie }; 3452373f6b9SDirk Brandewie 3462373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void) 3472373f6b9SDirk Brandewie { 348cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver); 3492373f6b9SDirk Brandewie } 35010452280SPratyush Anand subsys_initcall(dw_i2c_init_driver); 3512373f6b9SDirk Brandewie 3522373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void) 3532373f6b9SDirk Brandewie { 3542373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver); 3552373f6b9SDirk Brandewie } 3562373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver); 3572373f6b9SDirk Brandewie 3582373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); 3592373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); 3602373f6b9SDirk Brandewie MODULE_LICENSE("GPL"); 361