115c566fcSAndy Shevchenko // SPDX-License-Identifier: GPL-2.0-or-later 22373f6b9SDirk Brandewie /* 35b6d721bSLuis Oliveira * Synopsys DesignWare I2C adapter driver. 42373f6b9SDirk Brandewie * 52373f6b9SDirk Brandewie * Based on the TI DAVINCI I2C adapter driver. 62373f6b9SDirk Brandewie * 72373f6b9SDirk Brandewie * Copyright (C) 2006 Texas Instruments. 82373f6b9SDirk Brandewie * Copyright (C) 2007 MontaVista Software Inc. 92373f6b9SDirk Brandewie * Copyright (C) 2009 Provigent Ltd. 102373f6b9SDirk Brandewie */ 11e393f674SLuis Oliveira #include <linux/acpi.h> 12e393f674SLuis Oliveira #include <linux/clk-provider.h> 13e393f674SLuis Oliveira #include <linux/clk.h> 142373f6b9SDirk Brandewie #include <linux/delay.h> 152373f6b9SDirk Brandewie #include <linux/err.h> 16e393f674SLuis Oliveira #include <linux/errno.h> 17e393f674SLuis Oliveira #include <linux/i2c.h> 182373f6b9SDirk Brandewie #include <linux/interrupt.h> 19e393f674SLuis Oliveira #include <linux/io.h> 20e393f674SLuis Oliveira #include <linux/kernel.h> 21fcb82a93SSerge Semin #include <linux/mfd/syscon.h> 22e393f674SLuis Oliveira #include <linux/module.h> 239803f868SChristian Ruppert #include <linux/of.h> 24e393f674SLuis Oliveira #include <linux/platform_data/i2c-designware.h> 252373f6b9SDirk Brandewie #include <linux/platform_device.h> 263bf3b289SDeepak Sikri #include <linux/pm.h> 277272194eSMika Westerberg #include <linux/pm_runtime.h> 284c5301abSMika Westerberg #include <linux/property.h> 29fcb82a93SSerge Semin #include <linux/regmap.h> 30ab809fd8SZhangfei Gao #include <linux/reset.h> 31e393f674SLuis Oliveira #include <linux/sched.h> 322373f6b9SDirk Brandewie #include <linux/slab.h> 3302e45646SRafael J. Wysocki #include <linux/suspend.h> 34e393f674SLuis Oliveira 352373f6b9SDirk Brandewie #include "i2c-designware-core.h" 362373f6b9SDirk Brandewie 371d31b58fSDirk Brandewie static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 381d31b58fSDirk Brandewie { 391d31b58fSDirk Brandewie return clk_get_rate(dev->clk)/1000; 401d31b58fSDirk Brandewie } 412373f6b9SDirk Brandewie 42b61b1415SMika Westerberg #ifdef CONFIG_ACPI 43b61b1415SMika Westerberg static const struct acpi_device_id dw_i2c_acpi_match[] = { 44b61b1415SMika Westerberg { "INT33C2", 0 }, 45b61b1415SMika Westerberg { "INT33C3", 0 }, 4625b3dfc8SMika Westerberg { "INT3432", 0 }, 4725b3dfc8SMika Westerberg { "INT3433", 0 }, 48b30f2f65SHans de Goede { "80860F41", ACCESS_NO_IRQ_SUSPEND }, 49c615f5c6SSerge Semin { "808622C1", ACCESS_NO_IRQ_SUSPEND }, 502d244c81SXiangliang Yu { "AMD0010", ACCESS_INTR_MASK }, 51e4e666baSXiangliang Yu { "AMDI0010", ACCESS_INTR_MASK }, 5290708ce2SSuravee Suthikulpanit { "AMDI0510", 0 }, 5304a407f6SLoc Ho { "APMC0D0F", 0 }, 5458dd8abfSHanjun Guo { "HISI02A1", 0 }, 5558dd8abfSHanjun Guo { "HISI02A2", 0 }, 56dec0a81aSHanjun Guo { "HISI02A3", 0 }, 57b61b1415SMika Westerberg { } 58b61b1415SMika Westerberg }; 59b61b1415SMika Westerberg MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); 60b61b1415SMika Westerberg #endif 61b61b1415SMika Westerberg 6296742775SAlexandre Belloni #ifdef CONFIG_OF 63fcb82a93SSerge Semin #define BT1_I2C_CTL 0x100 64fcb82a93SSerge Semin #define BT1_I2C_CTL_ADDR_MASK GENMASK(7, 0) 65fcb82a93SSerge Semin #define BT1_I2C_CTL_WR BIT(8) 66fcb82a93SSerge Semin #define BT1_I2C_CTL_GO BIT(31) 67fcb82a93SSerge Semin #define BT1_I2C_DI 0x104 68fcb82a93SSerge Semin #define BT1_I2C_DO 0x108 69fcb82a93SSerge Semin 70fcb82a93SSerge Semin static int bt1_i2c_read(void *context, unsigned int reg, unsigned int *val) 71fcb82a93SSerge Semin { 72fcb82a93SSerge Semin struct dw_i2c_dev *dev = context; 73fcb82a93SSerge Semin int ret; 74fcb82a93SSerge Semin 75fcb82a93SSerge Semin /* 76fcb82a93SSerge Semin * Note these methods shouldn't ever fail because the system controller 77fcb82a93SSerge Semin * registers are memory mapped. We check the return value just in case. 78fcb82a93SSerge Semin */ 79fcb82a93SSerge Semin ret = regmap_write(dev->sysmap, BT1_I2C_CTL, 80fcb82a93SSerge Semin BT1_I2C_CTL_GO | (reg & BT1_I2C_CTL_ADDR_MASK)); 81fcb82a93SSerge Semin if (ret) 82fcb82a93SSerge Semin return ret; 83fcb82a93SSerge Semin 84fcb82a93SSerge Semin return regmap_read(dev->sysmap, BT1_I2C_DO, val); 85fcb82a93SSerge Semin } 86fcb82a93SSerge Semin 87fcb82a93SSerge Semin static int bt1_i2c_write(void *context, unsigned int reg, unsigned int val) 88fcb82a93SSerge Semin { 89fcb82a93SSerge Semin struct dw_i2c_dev *dev = context; 90fcb82a93SSerge Semin int ret; 91fcb82a93SSerge Semin 92fcb82a93SSerge Semin ret = regmap_write(dev->sysmap, BT1_I2C_DI, val); 93fcb82a93SSerge Semin if (ret) 94fcb82a93SSerge Semin return ret; 95fcb82a93SSerge Semin 96fcb82a93SSerge Semin return regmap_write(dev->sysmap, BT1_I2C_CTL, 97fcb82a93SSerge Semin BT1_I2C_CTL_GO | BT1_I2C_CTL_WR | (reg & BT1_I2C_CTL_ADDR_MASK)); 98fcb82a93SSerge Semin } 99fcb82a93SSerge Semin 100fcb82a93SSerge Semin static struct regmap_config bt1_i2c_cfg = { 101fcb82a93SSerge Semin .reg_bits = 32, 102fcb82a93SSerge Semin .val_bits = 32, 103fcb82a93SSerge Semin .reg_stride = 4, 104fcb82a93SSerge Semin .fast_io = true, 105fcb82a93SSerge Semin .reg_read = bt1_i2c_read, 106fcb82a93SSerge Semin .reg_write = bt1_i2c_write, 107fcb82a93SSerge Semin .max_register = DW_IC_COMP_TYPE, 108fcb82a93SSerge Semin }; 109fcb82a93SSerge Semin 110fcb82a93SSerge Semin static int bt1_i2c_request_regs(struct dw_i2c_dev *dev) 111fcb82a93SSerge Semin { 112fcb82a93SSerge Semin dev->sysmap = syscon_node_to_regmap(dev->dev->of_node->parent); 113fcb82a93SSerge Semin if (IS_ERR(dev->sysmap)) 114fcb82a93SSerge Semin return PTR_ERR(dev->sysmap); 115fcb82a93SSerge Semin 116fcb82a93SSerge Semin dev->map = devm_regmap_init(dev->dev, NULL, dev, &bt1_i2c_cfg); 117fcb82a93SSerge Semin return PTR_ERR_OR_ZERO(dev->map); 118fcb82a93SSerge Semin } 119fcb82a93SSerge Semin 1201bb39959SAlexandre Belloni #define MSCC_ICPU_CFG_TWI_DELAY 0x0 1211bb39959SAlexandre Belloni #define MSCC_ICPU_CFG_TWI_DELAY_ENABLE BIT(0) 1221bb39959SAlexandre Belloni #define MSCC_ICPU_CFG_TWI_SPIKE_FILTER 0x4 1231bb39959SAlexandre Belloni 1241bb39959SAlexandre Belloni static int mscc_twi_set_sda_hold_time(struct dw_i2c_dev *dev) 1251bb39959SAlexandre Belloni { 1261bb39959SAlexandre Belloni writel((dev->sda_hold_time << 1) | MSCC_ICPU_CFG_TWI_DELAY_ENABLE, 1271bb39959SAlexandre Belloni dev->ext + MSCC_ICPU_CFG_TWI_DELAY); 1281bb39959SAlexandre Belloni 1291bb39959SAlexandre Belloni return 0; 1301bb39959SAlexandre Belloni } 1311bb39959SAlexandre Belloni 1321bb39959SAlexandre Belloni static int dw_i2c_of_configure(struct platform_device *pdev) 1331bb39959SAlexandre Belloni { 1341bb39959SAlexandre Belloni struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 1351bb39959SAlexandre Belloni 1361bb39959SAlexandre Belloni switch (dev->flags & MODEL_MASK) { 1371bb39959SAlexandre Belloni case MODEL_MSCC_OCELOT: 138188fe480SAndy Shevchenko dev->ext = devm_platform_ioremap_resource(pdev, 1); 1391bb39959SAlexandre Belloni if (!IS_ERR(dev->ext)) 1401bb39959SAlexandre Belloni dev->set_sda_hold_time = mscc_twi_set_sda_hold_time; 1411bb39959SAlexandre Belloni break; 1421bb39959SAlexandre Belloni default: 1431bb39959SAlexandre Belloni break; 1441bb39959SAlexandre Belloni } 1451bb39959SAlexandre Belloni 1461bb39959SAlexandre Belloni return 0; 1471bb39959SAlexandre Belloni } 1481bb39959SAlexandre Belloni 14996742775SAlexandre Belloni static const struct of_device_id dw_i2c_of_match[] = { 15096742775SAlexandre Belloni { .compatible = "snps,designware-i2c", }, 1511bb39959SAlexandre Belloni { .compatible = "mscc,ocelot-i2c", .data = (void *)MODEL_MSCC_OCELOT }, 152fcb82a93SSerge Semin { .compatible = "baikal,bt1-sys-i2c", .data = (void *)MODEL_BAIKAL_BT1 }, 15396742775SAlexandre Belloni {}, 15496742775SAlexandre Belloni }; 15596742775SAlexandre Belloni MODULE_DEVICE_TABLE(of, dw_i2c_of_match); 1561bb39959SAlexandre Belloni #else 157fcb82a93SSerge Semin static int bt1_i2c_request_regs(struct dw_i2c_dev *dev) 158fcb82a93SSerge Semin { 159fcb82a93SSerge Semin return -ENODEV; 160fcb82a93SSerge Semin } 161fcb82a93SSerge Semin 1621bb39959SAlexandre Belloni static inline int dw_i2c_of_configure(struct platform_device *pdev) 1631bb39959SAlexandre Belloni { 1641bb39959SAlexandre Belloni return -ENODEV; 1651bb39959SAlexandre Belloni } 16696742775SAlexandre Belloni #endif 16796742775SAlexandre Belloni 168126dbc6bSRafael J. Wysocki static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev) 169126dbc6bSRafael J. Wysocki { 170126dbc6bSRafael J. Wysocki pm_runtime_disable(dev->dev); 171126dbc6bSRafael J. Wysocki 1729cbeeca0SHans de Goede if (dev->shared_with_punit) 173126dbc6bSRafael J. Wysocki pm_runtime_put_noidle(dev->dev); 174126dbc6bSRafael J. Wysocki } 175126dbc6bSRafael J. Wysocki 176b7c3d077SSerge Semin static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev) 177b7c3d077SSerge Semin { 178b7c3d077SSerge Semin struct platform_device *pdev = to_platform_device(dev->dev); 179fcb82a93SSerge Semin int ret; 180b7c3d077SSerge Semin 181fcb82a93SSerge Semin switch (dev->flags & MODEL_MASK) { 182fcb82a93SSerge Semin case MODEL_BAIKAL_BT1: 183fcb82a93SSerge Semin ret = bt1_i2c_request_regs(dev); 184fcb82a93SSerge Semin break; 185fcb82a93SSerge Semin default: 186b7c3d077SSerge Semin dev->base = devm_platform_ioremap_resource(pdev, 0); 187fcb82a93SSerge Semin ret = PTR_ERR_OR_ZERO(dev->base); 188fcb82a93SSerge Semin break; 189fcb82a93SSerge Semin } 190b7c3d077SSerge Semin 191fcb82a93SSerge Semin return ret; 192b7c3d077SSerge Semin } 193b7c3d077SSerge Semin 1946ad6fde3SJarkko Nikula static int dw_i2c_plat_probe(struct platform_device *pdev) 1952373f6b9SDirk Brandewie { 1964c5301abSMika Westerberg struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); 1972373f6b9SDirk Brandewie struct i2c_adapter *adap; 198e393f674SLuis Oliveira struct dw_i2c_dev *dev; 199e3ea52b5SAndy Shevchenko struct i2c_timings *t; 200f9288fccSAndy Shevchenko int irq, ret; 2012373f6b9SDirk Brandewie 2022373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0); 203b20d3864SAlexey Brodkin if (irq < 0) 204b20d3864SAlexey Brodkin return irq; 2052373f6b9SDirk Brandewie 2061cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); 2071cb715caSAndy Shevchenko if (!dev) 2081cb715caSAndy Shevchenko return -ENOMEM; 2092373f6b9SDirk Brandewie 210fac25d7aSSerge Semin dev->flags = (uintptr_t)device_get_match_data(&pdev->dev); 2111cb715caSAndy Shevchenko dev->dev = &pdev->dev; 2122373f6b9SDirk Brandewie dev->irq = irq; 2132373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev); 2142373f6b9SDirk Brandewie 215b7c3d077SSerge Semin ret = dw_i2c_plat_request_regs(dev); 216b7c3d077SSerge Semin if (ret) 217b7c3d077SSerge Semin return ret; 218b7c3d077SSerge Semin 219ab809fd8SZhangfei Gao dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL); 220a6af48ecSAndy Shevchenko if (IS_ERR(dev->rst)) 221a6af48ecSAndy Shevchenko return PTR_ERR(dev->rst); 222a6af48ecSAndy Shevchenko 223ab809fd8SZhangfei Gao reset_control_deassert(dev->rst); 224ab809fd8SZhangfei Gao 225e3ea52b5SAndy Shevchenko t = &dev->timings; 226e3ea52b5SAndy Shevchenko if (pdata) 227e3ea52b5SAndy Shevchenko t->bus_freq_hz = pdata->i2c_scl_freq; 228e3ea52b5SAndy Shevchenko else 229e3ea52b5SAndy Shevchenko i2c_parse_fw_timings(&pdev->dev, t, false); 2308e5f6b2aSRomain Baeriswyl 231f9288fccSAndy Shevchenko i2c_dw_acpi_adjust_bus_speed(&pdev->dev); 23210f8e7fbSJarkko Nikula 2331bb39959SAlexandre Belloni if (pdev->dev.of_node) 2341bb39959SAlexandre Belloni dw_i2c_of_configure(pdev); 2351bb39959SAlexandre Belloni 2364c5301abSMika Westerberg if (has_acpi_companion(&pdev->dev)) 237f9288fccSAndy Shevchenko i2c_dw_acpi_configure(&pdev->dev); 2384c5301abSMika Westerberg 23920ee1d90SAndy Shevchenko ret = i2c_dw_validate_speed(dev); 24020ee1d90SAndy Shevchenko if (ret) 241ab809fd8SZhangfei Gao goto exit_reset; 2429803f868SChristian Ruppert 243e393f674SLuis Oliveira ret = i2c_dw_probe_lock_support(dev); 244e393f674SLuis Oliveira if (ret) 245ab809fd8SZhangfei Gao goto exit_reset; 246894acb2fSDavid Box 2473ebe40edSAndy Shevchenko i2c_dw_configure(dev); 2482fa8326bSDirk Brandewie 249c62ebb3dSPhil Edworthy /* Optional interface clock */ 250c62ebb3dSPhil Edworthy dev->pclk = devm_clk_get_optional(&pdev->dev, "pclk"); 25171dc297cSAndy Shevchenko if (IS_ERR(dev->pclk)) { 25271dc297cSAndy Shevchenko ret = PTR_ERR(dev->pclk); 25371dc297cSAndy Shevchenko goto exit_reset; 25471dc297cSAndy Shevchenko } 255c62ebb3dSPhil Edworthy 256925ddb24SMika Westerberg dev->clk = devm_clk_get(&pdev->dev, NULL); 2570326f9f8SPhil Reid if (!i2c_dw_prepare_clk(dev, true)) { 258e3ea52b5SAndy Shevchenko u64 clk_khz; 259925ddb24SMika Westerberg 260e3ea52b5SAndy Shevchenko dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; 261e3ea52b5SAndy Shevchenko clk_khz = dev->get_clk_rate_khz(dev); 262e3ea52b5SAndy Shevchenko 263e3ea52b5SAndy Shevchenko if (!dev->sda_hold_time && t->sda_hold_ns) 264e3ea52b5SAndy Shevchenko dev->sda_hold_time = 265e3ea52b5SAndy Shevchenko div_u64(clk_khz * t->sda_hold_ns + 500000, 1000000); 266925ddb24SMika Westerberg } 267925ddb24SMika Westerberg 2682373f6b9SDirk Brandewie adap = &dev->adapter; 2692373f6b9SDirk Brandewie adap->owner = THIS_MODULE; 27070fba830SWolfram Sang adap->class = I2C_CLASS_DEPRECATED; 2718eb5c87aSDustin Byford ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); 272af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node; 27377f3381aSHans de Goede adap->nr = -1; 2742373f6b9SDirk Brandewie 275d79294d0SHans de Goede if (dev->flags & ACCESS_NO_IRQ_SUSPEND) { 276d79294d0SHans de Goede dev_pm_set_driver_flags(&pdev->dev, 277d79294d0SHans de Goede DPM_FLAG_SMART_PREPARE | 278d79294d0SHans de Goede DPM_FLAG_LEAVE_SUSPENDED); 279d79294d0SHans de Goede } else { 28002e45646SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, 28102e45646SRafael J. Wysocki DPM_FLAG_SMART_PREPARE | 28202e45646SRafael J. Wysocki DPM_FLAG_SMART_SUSPEND | 28302e45646SRafael J. Wysocki DPM_FLAG_LEAVE_SUSPENDED); 284d79294d0SHans de Goede } 285422cb781SRafael J. Wysocki 286126dbc6bSRafael J. Wysocki /* The code below assumes runtime PM to be disabled. */ 287126dbc6bSRafael J. Wysocki WARN_ON(pm_runtime_enabled(&pdev->dev)); 288126dbc6bSRafael J. Wysocki 28943452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); 29043452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev); 2917272194eSMika Westerberg pm_runtime_set_active(&pdev->dev); 292126dbc6bSRafael J. Wysocki 2939cbeeca0SHans de Goede if (dev->shared_with_punit) 294126dbc6bSRafael J. Wysocki pm_runtime_get_noresume(&pdev->dev); 295126dbc6bSRafael J. Wysocki 2967272194eSMika Westerberg pm_runtime_enable(&pdev->dev); 2977272194eSMika Westerberg 298e393f674SLuis Oliveira ret = i2c_dw_probe(dev); 299e393f674SLuis Oliveira if (ret) 300ab809fd8SZhangfei Gao goto exit_probe; 30136d48fb5SWolfram Sang 302e393f674SLuis Oliveira return ret; 303ab809fd8SZhangfei Gao 304ab809fd8SZhangfei Gao exit_probe: 305126dbc6bSRafael J. Wysocki dw_i2c_plat_pm_cleanup(dev); 306ab809fd8SZhangfei Gao exit_reset: 307ab809fd8SZhangfei Gao reset_control_assert(dev->rst); 308e393f674SLuis Oliveira return ret; 3092373f6b9SDirk Brandewie } 3102373f6b9SDirk Brandewie 3116ad6fde3SJarkko Nikula static int dw_i2c_plat_remove(struct platform_device *pdev) 3122373f6b9SDirk Brandewie { 3132373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 3142373f6b9SDirk Brandewie 3157272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev); 3167272194eSMika Westerberg 3172373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter); 3182373f6b9SDirk Brandewie 31990312351SLuis Oliveira dev->disable(dev); 3202373f6b9SDirk Brandewie 321edfc3901SMika Westerberg pm_runtime_dont_use_autosuspend(&pdev->dev); 322edfc3901SMika Westerberg pm_runtime_put_sync(&pdev->dev); 323126dbc6bSRafael J. Wysocki dw_i2c_plat_pm_cleanup(dev); 324126dbc6bSRafael J. Wysocki 325ab809fd8SZhangfei Gao reset_control_assert(dev->rst); 3267272194eSMika Westerberg 3272373f6b9SDirk Brandewie return 0; 3282373f6b9SDirk Brandewie } 3292373f6b9SDirk Brandewie 3308503ff16SJisheng Zhang #ifdef CONFIG_PM_SLEEP 3316ad6fde3SJarkko Nikula static int dw_i2c_plat_prepare(struct device *dev) 3328503ff16SJisheng Zhang { 333422cb781SRafael J. Wysocki /* 334422cb781SRafael J. Wysocki * If the ACPI companion device object is present for this device, it 335422cb781SRafael J. Wysocki * may be accessed during suspend and resume of other devices via I2C 336422cb781SRafael J. Wysocki * operation regions, so tell the PM core and middle layers to avoid 337422cb781SRafael J. Wysocki * skipping system suspend/resume callbacks for it in that case. 338422cb781SRafael J. Wysocki */ 339422cb781SRafael J. Wysocki return !has_acpi_companion(dev); 3408503ff16SJisheng Zhang } 3418503ff16SJisheng Zhang 3426ad6fde3SJarkko Nikula static void dw_i2c_plat_complete(struct device *dev) 3438503ff16SJisheng Zhang { 34402e45646SRafael J. Wysocki /* 34502e45646SRafael J. Wysocki * The device can only be in runtime suspend at this point if it has not 34602e45646SRafael J. Wysocki * been resumed throughout the ending system suspend/resume cycle, so if 34702e45646SRafael J. Wysocki * the platform firmware might mess up with it, request the runtime PM 34802e45646SRafael J. Wysocki * framework to resume it. 34902e45646SRafael J. Wysocki */ 35002e45646SRafael J. Wysocki if (pm_runtime_suspended(dev) && pm_resume_via_firmware()) 3518503ff16SJisheng Zhang pm_request_resume(dev); 3528503ff16SJisheng Zhang } 3538503ff16SJisheng Zhang #else 354319d7f05SJarkko Nikula #define dw_i2c_plat_prepare NULL 355319d7f05SJarkko Nikula #define dw_i2c_plat_complete NULL 3568503ff16SJisheng Zhang #endif 3578503ff16SJisheng Zhang 3581fc2fe20SMika Westerberg #ifdef CONFIG_PM 35954152772SRafael J. Wysocki static int dw_i2c_plat_suspend(struct device *dev) 3603bf3b289SDeepak Sikri { 3619242e72aSMasahiro Yamada struct dw_i2c_dev *i_dev = dev_get_drvdata(dev); 3623bf3b289SDeepak Sikri 36327515415SHans de Goede i_dev->suspended = true; 36427515415SHans de Goede 3659cbeeca0SHans de Goede if (i_dev->shared_with_punit) 3669d9a152eSHans de Goede return 0; 3679d9a152eSHans de Goede 36890312351SLuis Oliveira i_dev->disable(i_dev); 3690326f9f8SPhil Reid i2c_dw_prepare_clk(i_dev, false); 3703bf3b289SDeepak Sikri 3713bf3b289SDeepak Sikri return 0; 3723bf3b289SDeepak Sikri } 3733bf3b289SDeepak Sikri 3746ad6fde3SJarkko Nikula static int dw_i2c_plat_resume(struct device *dev) 3753bf3b289SDeepak Sikri { 3769242e72aSMasahiro Yamada struct dw_i2c_dev *i_dev = dev_get_drvdata(dev); 3773bf3b289SDeepak Sikri 3789cbeeca0SHans de Goede if (!i_dev->shared_with_punit) 3790326f9f8SPhil Reid i2c_dw_prepare_clk(i_dev, true); 3809d9a152eSHans de Goede 38190312351SLuis Oliveira i_dev->init(i_dev); 38227515415SHans de Goede i_dev->suspended = false; 3833bf3b289SDeepak Sikri 3843bf3b289SDeepak Sikri return 0; 3853bf3b289SDeepak Sikri } 3863bf3b289SDeepak Sikri 3878503ff16SJisheng Zhang static const struct dev_pm_ops dw_i2c_dev_pm_ops = { 3886ad6fde3SJarkko Nikula .prepare = dw_i2c_plat_prepare, 3896ad6fde3SJarkko Nikula .complete = dw_i2c_plat_complete, 39054152772SRafael J. Wysocki SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume) 39154152772SRafael J. Wysocki SET_RUNTIME_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume, NULL) 3928503ff16SJisheng Zhang }; 3938503ff16SJisheng Zhang 3948503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops) 3958503ff16SJisheng Zhang #else 3968503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS NULL 3978503ff16SJisheng Zhang #endif 3981fc2fe20SMika Westerberg 399e393f674SLuis Oliveira /* Work with hotplug and coldplug */ 4002373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware"); 4012373f6b9SDirk Brandewie 4022373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = { 4036ad6fde3SJarkko Nikula .probe = dw_i2c_plat_probe, 4046ad6fde3SJarkko Nikula .remove = dw_i2c_plat_remove, 4052373f6b9SDirk Brandewie .driver = { 4062373f6b9SDirk Brandewie .name = "i2c_designware", 407af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match), 408b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), 4098503ff16SJisheng Zhang .pm = DW_I2C_DEV_PMOPS, 4102373f6b9SDirk Brandewie }, 4112373f6b9SDirk Brandewie }; 4122373f6b9SDirk Brandewie 4132373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void) 4142373f6b9SDirk Brandewie { 415cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver); 4162373f6b9SDirk Brandewie } 41710452280SPratyush Anand subsys_initcall(dw_i2c_init_driver); 4182373f6b9SDirk Brandewie 4192373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void) 4202373f6b9SDirk Brandewie { 4212373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver); 4222373f6b9SDirk Brandewie } 4232373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver); 4242373f6b9SDirk Brandewie 4252373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); 4262373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); 4272373f6b9SDirk Brandewie MODULE_LICENSE("GPL"); 428