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> 15db2a8b6fSRicardo Ribalda #include <linux/dmi.h> 162373f6b9SDirk Brandewie #include <linux/err.h> 17e393f674SLuis Oliveira #include <linux/errno.h> 18e393f674SLuis Oliveira #include <linux/i2c.h> 192373f6b9SDirk Brandewie #include <linux/interrupt.h> 20e393f674SLuis Oliveira #include <linux/io.h> 21e393f674SLuis Oliveira #include <linux/kernel.h> 22fcb82a93SSerge Semin #include <linux/mfd/syscon.h> 23e393f674SLuis Oliveira #include <linux/module.h> 249803f868SChristian Ruppert #include <linux/of.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> 34c045214aSAndy Shevchenko #include <linux/units.h> 35e393f674SLuis Oliveira 362373f6b9SDirk Brandewie #include "i2c-designware-core.h" 372373f6b9SDirk Brandewie 381d31b58fSDirk Brandewie static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) 391d31b58fSDirk Brandewie { 40c045214aSAndy Shevchenko return clk_get_rate(dev->clk) / KILO; 411d31b58fSDirk Brandewie } 422373f6b9SDirk Brandewie 43b61b1415SMika Westerberg #ifdef CONFIG_ACPI 44b61b1415SMika Westerberg static const struct acpi_device_id dw_i2c_acpi_match[] = { 45b61b1415SMika Westerberg { "INT33C2", 0 }, 46b61b1415SMika Westerberg { "INT33C3", 0 }, 4725b3dfc8SMika Westerberg { "INT3432", 0 }, 4825b3dfc8SMika Westerberg { "INT3433", 0 }, 49b30f2f65SHans de Goede { "80860F41", ACCESS_NO_IRQ_SUSPEND }, 50c615f5c6SSerge Semin { "808622C1", ACCESS_NO_IRQ_SUSPEND }, 512d244c81SXiangliang Yu { "AMD0010", ACCESS_INTR_MASK }, 52e4e666baSXiangliang Yu { "AMDI0010", ACCESS_INTR_MASK }, 5378d5e9e2SJan Dabros { "AMDI0019", ACCESS_INTR_MASK | ARBITRATION_SEMAPHORE }, 5490708ce2SSuravee Suthikulpanit { "AMDI0510", 0 }, 5504a407f6SLoc Ho { "APMC0D0F", 0 }, 5658dd8abfSHanjun Guo { "HISI02A1", 0 }, 5758dd8abfSHanjun Guo { "HISI02A2", 0 }, 58dec0a81aSHanjun Guo { "HISI02A3", 0 }, 59384b02d6SPu Wen { "HYGO0010", ACCESS_INTR_MASK }, 60b61b1415SMika Westerberg { } 61b61b1415SMika Westerberg }; 62b61b1415SMika Westerberg MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); 63b61b1415SMika Westerberg #endif 64b61b1415SMika Westerberg 6596742775SAlexandre Belloni #ifdef CONFIG_OF 66fcb82a93SSerge Semin #define BT1_I2C_CTL 0x100 67fcb82a93SSerge Semin #define BT1_I2C_CTL_ADDR_MASK GENMASK(7, 0) 68fcb82a93SSerge Semin #define BT1_I2C_CTL_WR BIT(8) 69fcb82a93SSerge Semin #define BT1_I2C_CTL_GO BIT(31) 70fcb82a93SSerge Semin #define BT1_I2C_DI 0x104 71fcb82a93SSerge Semin #define BT1_I2C_DO 0x108 72fcb82a93SSerge Semin 73fcb82a93SSerge Semin static int bt1_i2c_read(void *context, unsigned int reg, unsigned int *val) 74fcb82a93SSerge Semin { 75fcb82a93SSerge Semin struct dw_i2c_dev *dev = context; 76fcb82a93SSerge Semin int ret; 77fcb82a93SSerge Semin 78fcb82a93SSerge Semin /* 79fcb82a93SSerge Semin * Note these methods shouldn't ever fail because the system controller 80fcb82a93SSerge Semin * registers are memory mapped. We check the return value just in case. 81fcb82a93SSerge Semin */ 82fcb82a93SSerge Semin ret = regmap_write(dev->sysmap, BT1_I2C_CTL, 83fcb82a93SSerge Semin BT1_I2C_CTL_GO | (reg & BT1_I2C_CTL_ADDR_MASK)); 84fcb82a93SSerge Semin if (ret) 85fcb82a93SSerge Semin return ret; 86fcb82a93SSerge Semin 87fcb82a93SSerge Semin return regmap_read(dev->sysmap, BT1_I2C_DO, val); 88fcb82a93SSerge Semin } 89fcb82a93SSerge Semin 90fcb82a93SSerge Semin static int bt1_i2c_write(void *context, unsigned int reg, unsigned int val) 91fcb82a93SSerge Semin { 92fcb82a93SSerge Semin struct dw_i2c_dev *dev = context; 93fcb82a93SSerge Semin int ret; 94fcb82a93SSerge Semin 95fcb82a93SSerge Semin ret = regmap_write(dev->sysmap, BT1_I2C_DI, val); 96fcb82a93SSerge Semin if (ret) 97fcb82a93SSerge Semin return ret; 98fcb82a93SSerge Semin 99fcb82a93SSerge Semin return regmap_write(dev->sysmap, BT1_I2C_CTL, 100fcb82a93SSerge Semin BT1_I2C_CTL_GO | BT1_I2C_CTL_WR | (reg & BT1_I2C_CTL_ADDR_MASK)); 101fcb82a93SSerge Semin } 102fcb82a93SSerge Semin 103fcb82a93SSerge Semin static struct regmap_config bt1_i2c_cfg = { 104fcb82a93SSerge Semin .reg_bits = 32, 105fcb82a93SSerge Semin .val_bits = 32, 106fcb82a93SSerge Semin .reg_stride = 4, 107fcb82a93SSerge Semin .fast_io = true, 108fcb82a93SSerge Semin .reg_read = bt1_i2c_read, 109fcb82a93SSerge Semin .reg_write = bt1_i2c_write, 110fcb82a93SSerge Semin .max_register = DW_IC_COMP_TYPE, 111fcb82a93SSerge Semin }; 112fcb82a93SSerge Semin 113fcb82a93SSerge Semin static int bt1_i2c_request_regs(struct dw_i2c_dev *dev) 114fcb82a93SSerge Semin { 115fcb82a93SSerge Semin dev->sysmap = syscon_node_to_regmap(dev->dev->of_node->parent); 116fcb82a93SSerge Semin if (IS_ERR(dev->sysmap)) 117fcb82a93SSerge Semin return PTR_ERR(dev->sysmap); 118fcb82a93SSerge Semin 119fcb82a93SSerge Semin dev->map = devm_regmap_init(dev->dev, NULL, dev, &bt1_i2c_cfg); 120fcb82a93SSerge Semin return PTR_ERR_OR_ZERO(dev->map); 121fcb82a93SSerge Semin } 122fcb82a93SSerge Semin 1231bb39959SAlexandre Belloni #define MSCC_ICPU_CFG_TWI_DELAY 0x0 1241bb39959SAlexandre Belloni #define MSCC_ICPU_CFG_TWI_DELAY_ENABLE BIT(0) 1251bb39959SAlexandre Belloni #define MSCC_ICPU_CFG_TWI_SPIKE_FILTER 0x4 1261bb39959SAlexandre Belloni 1271bb39959SAlexandre Belloni static int mscc_twi_set_sda_hold_time(struct dw_i2c_dev *dev) 1281bb39959SAlexandre Belloni { 1291bb39959SAlexandre Belloni writel((dev->sda_hold_time << 1) | MSCC_ICPU_CFG_TWI_DELAY_ENABLE, 1301bb39959SAlexandre Belloni dev->ext + MSCC_ICPU_CFG_TWI_DELAY); 1311bb39959SAlexandre Belloni 1321bb39959SAlexandre Belloni return 0; 1331bb39959SAlexandre Belloni } 1341bb39959SAlexandre Belloni 1351bb39959SAlexandre Belloni static int dw_i2c_of_configure(struct platform_device *pdev) 1361bb39959SAlexandre Belloni { 1371bb39959SAlexandre Belloni struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 1381bb39959SAlexandre Belloni 1391bb39959SAlexandre Belloni switch (dev->flags & MODEL_MASK) { 1401bb39959SAlexandre Belloni case MODEL_MSCC_OCELOT: 141188fe480SAndy Shevchenko dev->ext = devm_platform_ioremap_resource(pdev, 1); 1421bb39959SAlexandre Belloni if (!IS_ERR(dev->ext)) 1431bb39959SAlexandre Belloni dev->set_sda_hold_time = mscc_twi_set_sda_hold_time; 1441bb39959SAlexandre Belloni break; 1451bb39959SAlexandre Belloni default: 1461bb39959SAlexandre Belloni break; 1471bb39959SAlexandre Belloni } 1481bb39959SAlexandre Belloni 1491bb39959SAlexandre Belloni return 0; 1501bb39959SAlexandre Belloni } 1511bb39959SAlexandre Belloni 15296742775SAlexandre Belloni static const struct of_device_id dw_i2c_of_match[] = { 15396742775SAlexandre Belloni { .compatible = "snps,designware-i2c", }, 1541bb39959SAlexandre Belloni { .compatible = "mscc,ocelot-i2c", .data = (void *)MODEL_MSCC_OCELOT }, 155fcb82a93SSerge Semin { .compatible = "baikal,bt1-sys-i2c", .data = (void *)MODEL_BAIKAL_BT1 }, 15696742775SAlexandre Belloni {}, 15796742775SAlexandre Belloni }; 15896742775SAlexandre Belloni MODULE_DEVICE_TABLE(of, dw_i2c_of_match); 1591bb39959SAlexandre Belloni #else 160fcb82a93SSerge Semin static int bt1_i2c_request_regs(struct dw_i2c_dev *dev) 161fcb82a93SSerge Semin { 162fcb82a93SSerge Semin return -ENODEV; 163fcb82a93SSerge Semin } 164fcb82a93SSerge Semin 1651bb39959SAlexandre Belloni static inline int dw_i2c_of_configure(struct platform_device *pdev) 1661bb39959SAlexandre Belloni { 1671bb39959SAlexandre Belloni return -ENODEV; 1681bb39959SAlexandre Belloni } 16996742775SAlexandre Belloni #endif 17096742775SAlexandre Belloni 171126dbc6bSRafael J. Wysocki static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev) 172126dbc6bSRafael J. Wysocki { 173126dbc6bSRafael J. Wysocki pm_runtime_disable(dev->dev); 174126dbc6bSRafael J. Wysocki 1759cbeeca0SHans de Goede if (dev->shared_with_punit) 176126dbc6bSRafael J. Wysocki pm_runtime_put_noidle(dev->dev); 177126dbc6bSRafael J. Wysocki } 178126dbc6bSRafael J. Wysocki 179b7c3d077SSerge Semin static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev) 180b7c3d077SSerge Semin { 181b7c3d077SSerge Semin struct platform_device *pdev = to_platform_device(dev->dev); 182fcb82a93SSerge Semin int ret; 183b7c3d077SSerge Semin 184fcb82a93SSerge Semin switch (dev->flags & MODEL_MASK) { 185fcb82a93SSerge Semin case MODEL_BAIKAL_BT1: 186fcb82a93SSerge Semin ret = bt1_i2c_request_regs(dev); 187fcb82a93SSerge Semin break; 188fcb82a93SSerge Semin default: 189b7c3d077SSerge Semin dev->base = devm_platform_ioremap_resource(pdev, 0); 190fcb82a93SSerge Semin ret = PTR_ERR_OR_ZERO(dev->base); 191fcb82a93SSerge Semin break; 192fcb82a93SSerge Semin } 193b7c3d077SSerge Semin 194fcb82a93SSerge Semin return ret; 195b7c3d077SSerge Semin } 19690224e64SAndy Shevchenko 197db2a8b6fSRicardo Ribalda static const struct dmi_system_id dw_i2c_hwmon_class_dmi[] = { 198db2a8b6fSRicardo Ribalda { 199db2a8b6fSRicardo Ribalda .ident = "Qtechnology QT5222", 200db2a8b6fSRicardo Ribalda .matches = { 201db2a8b6fSRicardo Ribalda DMI_MATCH(DMI_SYS_VENDOR, "Qtechnology"), 202db2a8b6fSRicardo Ribalda DMI_MATCH(DMI_PRODUCT_NAME, "QT5222"), 203db2a8b6fSRicardo Ribalda }, 204db2a8b6fSRicardo Ribalda }, 205db2a8b6fSRicardo Ribalda { } /* terminate list */ 206db2a8b6fSRicardo Ribalda }; 207db2a8b6fSRicardo Ribalda 20878d5e9e2SJan Dabros static const struct i2c_dw_semaphore_callbacks i2c_dw_semaphore_cb_table[] = { 20978d5e9e2SJan Dabros #ifdef CONFIG_I2C_DESIGNWARE_BAYTRAIL 21078d5e9e2SJan Dabros { 21178d5e9e2SJan Dabros .probe = i2c_dw_baytrail_probe_lock_support, 21278d5e9e2SJan Dabros }, 21378d5e9e2SJan Dabros #endif 21478d5e9e2SJan Dabros #ifdef CONFIG_I2C_DESIGNWARE_AMDPSP 21578d5e9e2SJan Dabros { 21678d5e9e2SJan Dabros .probe = i2c_dw_amdpsp_probe_lock_support, 21778d5e9e2SJan Dabros .remove = i2c_dw_amdpsp_remove_lock_support, 21878d5e9e2SJan Dabros }, 21978d5e9e2SJan Dabros #endif 22078d5e9e2SJan Dabros {} 22178d5e9e2SJan Dabros }; 22278d5e9e2SJan Dabros 22378d5e9e2SJan Dabros static int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev) 22478d5e9e2SJan Dabros { 22578d5e9e2SJan Dabros const struct i2c_dw_semaphore_callbacks *ptr; 22678d5e9e2SJan Dabros int i = 0; 22778d5e9e2SJan Dabros int ret; 22878d5e9e2SJan Dabros 22978d5e9e2SJan Dabros ptr = i2c_dw_semaphore_cb_table; 23078d5e9e2SJan Dabros 23178d5e9e2SJan Dabros dev->semaphore_idx = -1; 23278d5e9e2SJan Dabros 23378d5e9e2SJan Dabros while (ptr->probe) { 23478d5e9e2SJan Dabros ret = ptr->probe(dev); 23578d5e9e2SJan Dabros if (ret) { 23678d5e9e2SJan Dabros /* 23778d5e9e2SJan Dabros * If there is no semaphore device attached to this 23878d5e9e2SJan Dabros * controller, we shouldn't abort general i2c_controller 23978d5e9e2SJan Dabros * probe. 24078d5e9e2SJan Dabros */ 24178d5e9e2SJan Dabros if (ret != -ENODEV) 24278d5e9e2SJan Dabros return ret; 24378d5e9e2SJan Dabros 24478d5e9e2SJan Dabros i++; 24578d5e9e2SJan Dabros ptr++; 24678d5e9e2SJan Dabros continue; 24778d5e9e2SJan Dabros } 24878d5e9e2SJan Dabros 24978d5e9e2SJan Dabros dev->semaphore_idx = i; 25078d5e9e2SJan Dabros break; 25178d5e9e2SJan Dabros } 25278d5e9e2SJan Dabros 25378d5e9e2SJan Dabros return 0; 25478d5e9e2SJan Dabros } 25578d5e9e2SJan Dabros 25678d5e9e2SJan Dabros static void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev) 25778d5e9e2SJan Dabros { 25878d5e9e2SJan Dabros if (dev->semaphore_idx < 0) 25978d5e9e2SJan Dabros return; 26078d5e9e2SJan Dabros 26178d5e9e2SJan Dabros if (i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove) 26278d5e9e2SJan Dabros i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove(dev); 26378d5e9e2SJan Dabros } 26478d5e9e2SJan Dabros 2656ad6fde3SJarkko Nikula static int dw_i2c_plat_probe(struct platform_device *pdev) 2662373f6b9SDirk Brandewie { 2672373f6b9SDirk Brandewie struct i2c_adapter *adap; 268e393f674SLuis Oliveira struct dw_i2c_dev *dev; 269e3ea52b5SAndy Shevchenko struct i2c_timings *t; 270f9288fccSAndy Shevchenko int irq, ret; 2712373f6b9SDirk Brandewie 2722373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0); 273b20d3864SAlexey Brodkin if (irq < 0) 274b20d3864SAlexey Brodkin return irq; 2752373f6b9SDirk Brandewie 2761cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); 2771cb715caSAndy Shevchenko if (!dev) 2781cb715caSAndy Shevchenko return -ENOMEM; 2792373f6b9SDirk Brandewie 280fac25d7aSSerge Semin dev->flags = (uintptr_t)device_get_match_data(&pdev->dev); 2811cb715caSAndy Shevchenko dev->dev = &pdev->dev; 2822373f6b9SDirk Brandewie dev->irq = irq; 2832373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev); 2842373f6b9SDirk Brandewie 285b7c3d077SSerge Semin ret = dw_i2c_plat_request_regs(dev); 286b7c3d077SSerge Semin if (ret) 287b7c3d077SSerge Semin return ret; 288b7c3d077SSerge Semin 289ab809fd8SZhangfei Gao dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL); 290a6af48ecSAndy Shevchenko if (IS_ERR(dev->rst)) 291a6af48ecSAndy Shevchenko return PTR_ERR(dev->rst); 292a6af48ecSAndy Shevchenko 293ab809fd8SZhangfei Gao reset_control_deassert(dev->rst); 294ab809fd8SZhangfei Gao 295e3ea52b5SAndy Shevchenko t = &dev->timings; 296e3ea52b5SAndy Shevchenko i2c_parse_fw_timings(&pdev->dev, t, false); 2978e5f6b2aSRomain Baeriswyl 298852f7194SAndy Shevchenko i2c_dw_adjust_bus_speed(dev); 2991732c22aSAlexandre Belloni 3001bb39959SAlexandre Belloni if (pdev->dev.of_node) 3011bb39959SAlexandre Belloni dw_i2c_of_configure(pdev); 3021bb39959SAlexandre Belloni 3034c5301abSMika Westerberg if (has_acpi_companion(&pdev->dev)) 304f9288fccSAndy Shevchenko i2c_dw_acpi_configure(&pdev->dev); 3054c5301abSMika Westerberg 30620ee1d90SAndy Shevchenko ret = i2c_dw_validate_speed(dev); 30720ee1d90SAndy Shevchenko if (ret) 308ab809fd8SZhangfei Gao goto exit_reset; 3099803f868SChristian Ruppert 310e393f674SLuis Oliveira ret = i2c_dw_probe_lock_support(dev); 311e393f674SLuis Oliveira if (ret) 312ab809fd8SZhangfei Gao goto exit_reset; 313894acb2fSDavid Box 3143ebe40edSAndy Shevchenko i2c_dw_configure(dev); 3152fa8326bSDirk Brandewie 316c62ebb3dSPhil Edworthy /* Optional interface clock */ 317c62ebb3dSPhil Edworthy dev->pclk = devm_clk_get_optional(&pdev->dev, "pclk"); 31871dc297cSAndy Shevchenko if (IS_ERR(dev->pclk)) { 31971dc297cSAndy Shevchenko ret = PTR_ERR(dev->pclk); 32071dc297cSAndy Shevchenko goto exit_reset; 32171dc297cSAndy Shevchenko } 322c62ebb3dSPhil Edworthy 323925ddb24SMika Westerberg dev->clk = devm_clk_get(&pdev->dev, NULL); 3240326f9f8SPhil Reid if (!i2c_dw_prepare_clk(dev, true)) { 325e3ea52b5SAndy Shevchenko u64 clk_khz; 326925ddb24SMika Westerberg 327e3ea52b5SAndy Shevchenko dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; 328e3ea52b5SAndy Shevchenko clk_khz = dev->get_clk_rate_khz(dev); 329e3ea52b5SAndy Shevchenko 330e3ea52b5SAndy Shevchenko if (!dev->sda_hold_time && t->sda_hold_ns) 331e3ea52b5SAndy Shevchenko dev->sda_hold_time = 332c045214aSAndy Shevchenko DIV_S64_ROUND_CLOSEST(clk_khz * t->sda_hold_ns, MICRO); 333925ddb24SMika Westerberg } 334925ddb24SMika Westerberg 3352373f6b9SDirk Brandewie adap = &dev->adapter; 3362373f6b9SDirk Brandewie adap->owner = THIS_MODULE; 337db2a8b6fSRicardo Ribalda adap->class = dmi_check_system(dw_i2c_hwmon_class_dmi) ? 338db2a8b6fSRicardo Ribalda I2C_CLASS_HWMON : I2C_CLASS_DEPRECATED; 3398eb5c87aSDustin Byford ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); 340af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node; 34177f3381aSHans de Goede adap->nr = -1; 3422373f6b9SDirk Brandewie 343d79294d0SHans de Goede if (dev->flags & ACCESS_NO_IRQ_SUSPEND) { 344d79294d0SHans de Goede dev_pm_set_driver_flags(&pdev->dev, 345d79294d0SHans de Goede DPM_FLAG_SMART_PREPARE | 3462a3f3475SRafael J. Wysocki DPM_FLAG_MAY_SKIP_RESUME); 347d79294d0SHans de Goede } else { 34802e45646SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev, 34902e45646SRafael J. Wysocki DPM_FLAG_SMART_PREPARE | 35002e45646SRafael J. Wysocki DPM_FLAG_SMART_SUSPEND | 3512a3f3475SRafael J. Wysocki DPM_FLAG_MAY_SKIP_RESUME); 352d79294d0SHans de Goede } 353422cb781SRafael J. Wysocki 3547c5b3c15SRajat Jain device_enable_async_suspend(&pdev->dev); 3557c5b3c15SRajat Jain 356126dbc6bSRafael J. Wysocki /* The code below assumes runtime PM to be disabled. */ 357126dbc6bSRafael J. Wysocki WARN_ON(pm_runtime_enabled(&pdev->dev)); 358126dbc6bSRafael J. Wysocki 35943452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); 36043452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev); 3617272194eSMika Westerberg pm_runtime_set_active(&pdev->dev); 362126dbc6bSRafael J. Wysocki 3639cbeeca0SHans de Goede if (dev->shared_with_punit) 364126dbc6bSRafael J. Wysocki pm_runtime_get_noresume(&pdev->dev); 365126dbc6bSRafael J. Wysocki 3667272194eSMika Westerberg pm_runtime_enable(&pdev->dev); 3677272194eSMika Westerberg 368e393f674SLuis Oliveira ret = i2c_dw_probe(dev); 369e393f674SLuis Oliveira if (ret) 370ab809fd8SZhangfei Gao goto exit_probe; 37136d48fb5SWolfram Sang 372e393f674SLuis Oliveira return ret; 373ab809fd8SZhangfei Gao 374ab809fd8SZhangfei Gao exit_probe: 375126dbc6bSRafael J. Wysocki dw_i2c_plat_pm_cleanup(dev); 376ab809fd8SZhangfei Gao exit_reset: 377ab809fd8SZhangfei Gao reset_control_assert(dev->rst); 378e393f674SLuis Oliveira return ret; 3792373f6b9SDirk Brandewie } 3802373f6b9SDirk Brandewie 3816ad6fde3SJarkko Nikula static int dw_i2c_plat_remove(struct platform_device *pdev) 3822373f6b9SDirk Brandewie { 3832373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev); 3842373f6b9SDirk Brandewie 3857272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev); 3867272194eSMika Westerberg 3872373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter); 3882373f6b9SDirk Brandewie 38990312351SLuis Oliveira dev->disable(dev); 3902373f6b9SDirk Brandewie 391edfc3901SMika Westerberg pm_runtime_dont_use_autosuspend(&pdev->dev); 392edfc3901SMika Westerberg pm_runtime_put_sync(&pdev->dev); 393126dbc6bSRafael J. Wysocki dw_i2c_plat_pm_cleanup(dev); 394126dbc6bSRafael J. Wysocki 39578d5e9e2SJan Dabros i2c_dw_remove_lock_support(dev); 39678d5e9e2SJan Dabros 397ab809fd8SZhangfei Gao reset_control_assert(dev->rst); 3987272194eSMika Westerberg 3992373f6b9SDirk Brandewie return 0; 4002373f6b9SDirk Brandewie } 4012373f6b9SDirk Brandewie 4028503ff16SJisheng Zhang #ifdef CONFIG_PM_SLEEP 4036ad6fde3SJarkko Nikula static int dw_i2c_plat_prepare(struct device *dev) 4048503ff16SJisheng Zhang { 405422cb781SRafael J. Wysocki /* 406422cb781SRafael J. Wysocki * If the ACPI companion device object is present for this device, it 407422cb781SRafael J. Wysocki * may be accessed during suspend and resume of other devices via I2C 408422cb781SRafael J. Wysocki * operation regions, so tell the PM core and middle layers to avoid 409422cb781SRafael J. Wysocki * skipping system suspend/resume callbacks for it in that case. 410422cb781SRafael J. Wysocki */ 411422cb781SRafael J. Wysocki return !has_acpi_companion(dev); 4128503ff16SJisheng Zhang } 4138503ff16SJisheng Zhang 4146ad6fde3SJarkko Nikula static void dw_i2c_plat_complete(struct device *dev) 4158503ff16SJisheng Zhang { 41602e45646SRafael J. Wysocki /* 41702e45646SRafael J. Wysocki * The device can only be in runtime suspend at this point if it has not 41802e45646SRafael J. Wysocki * been resumed throughout the ending system suspend/resume cycle, so if 41902e45646SRafael J. Wysocki * the platform firmware might mess up with it, request the runtime PM 42002e45646SRafael J. Wysocki * framework to resume it. 42102e45646SRafael J. Wysocki */ 42202e45646SRafael J. Wysocki if (pm_runtime_suspended(dev) && pm_resume_via_firmware()) 4238503ff16SJisheng Zhang pm_request_resume(dev); 4248503ff16SJisheng Zhang } 4258503ff16SJisheng Zhang #else 426319d7f05SJarkko Nikula #define dw_i2c_plat_prepare NULL 427319d7f05SJarkko Nikula #define dw_i2c_plat_complete NULL 4288503ff16SJisheng Zhang #endif 4298503ff16SJisheng Zhang 4301fc2fe20SMika Westerberg #ifdef CONFIG_PM 431*c57813b8SHans de Goede static int dw_i2c_plat_runtime_suspend(struct device *dev) 4323bf3b289SDeepak Sikri { 4339242e72aSMasahiro Yamada struct dw_i2c_dev *i_dev = dev_get_drvdata(dev); 4343bf3b289SDeepak Sikri 4359cbeeca0SHans de Goede if (i_dev->shared_with_punit) 4369d9a152eSHans de Goede return 0; 4379d9a152eSHans de Goede 43890312351SLuis Oliveira i_dev->disable(i_dev); 4390326f9f8SPhil Reid i2c_dw_prepare_clk(i_dev, false); 4403bf3b289SDeepak Sikri 4413bf3b289SDeepak Sikri return 0; 4423bf3b289SDeepak Sikri } 4433bf3b289SDeepak Sikri 444*c57813b8SHans de Goede static int dw_i2c_plat_suspend(struct device *dev) 445*c57813b8SHans de Goede { 446*c57813b8SHans de Goede struct dw_i2c_dev *i_dev = dev_get_drvdata(dev); 447*c57813b8SHans de Goede 448*c57813b8SHans de Goede i2c_lock_bus(&i_dev->adapter, I2C_LOCK_ROOT_ADAPTER); 449*c57813b8SHans de Goede i_dev->suspended = true; 450*c57813b8SHans de Goede i2c_unlock_bus(&i_dev->adapter, I2C_LOCK_ROOT_ADAPTER); 451*c57813b8SHans de Goede 452*c57813b8SHans de Goede return dw_i2c_plat_runtime_suspend(dev); 453*c57813b8SHans de Goede } 454*c57813b8SHans de Goede 455*c57813b8SHans de Goede static int dw_i2c_plat_runtime_resume(struct device *dev) 4563bf3b289SDeepak Sikri { 4579242e72aSMasahiro Yamada struct dw_i2c_dev *i_dev = dev_get_drvdata(dev); 4583bf3b289SDeepak Sikri 4599cbeeca0SHans de Goede if (!i_dev->shared_with_punit) 4600326f9f8SPhil Reid i2c_dw_prepare_clk(i_dev, true); 4619d9a152eSHans de Goede 46290312351SLuis Oliveira i_dev->init(i_dev); 463*c57813b8SHans de Goede 464*c57813b8SHans de Goede return 0; 465*c57813b8SHans de Goede } 466*c57813b8SHans de Goede 467*c57813b8SHans de Goede static int dw_i2c_plat_resume(struct device *dev) 468*c57813b8SHans de Goede { 469*c57813b8SHans de Goede struct dw_i2c_dev *i_dev = dev_get_drvdata(dev); 470*c57813b8SHans de Goede 471*c57813b8SHans de Goede dw_i2c_plat_runtime_resume(dev); 472*c57813b8SHans de Goede 473*c57813b8SHans de Goede i2c_lock_bus(&i_dev->adapter, I2C_LOCK_ROOT_ADAPTER); 47427515415SHans de Goede i_dev->suspended = false; 475*c57813b8SHans de Goede i2c_unlock_bus(&i_dev->adapter, I2C_LOCK_ROOT_ADAPTER); 4763bf3b289SDeepak Sikri 4773bf3b289SDeepak Sikri return 0; 4783bf3b289SDeepak Sikri } 4793bf3b289SDeepak Sikri 4808503ff16SJisheng Zhang static const struct dev_pm_ops dw_i2c_dev_pm_ops = { 4816ad6fde3SJarkko Nikula .prepare = dw_i2c_plat_prepare, 4826ad6fde3SJarkko Nikula .complete = dw_i2c_plat_complete, 48354152772SRafael J. Wysocki SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume) 484*c57813b8SHans de Goede SET_RUNTIME_PM_OPS(dw_i2c_plat_runtime_suspend, dw_i2c_plat_runtime_resume, NULL) 4858503ff16SJisheng Zhang }; 4868503ff16SJisheng Zhang 4878503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops) 4888503ff16SJisheng Zhang #else 4898503ff16SJisheng Zhang #define DW_I2C_DEV_PMOPS NULL 4908503ff16SJisheng Zhang #endif 4911fc2fe20SMika Westerberg 492e393f674SLuis Oliveira /* Work with hotplug and coldplug */ 4932373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware"); 4942373f6b9SDirk Brandewie 4952373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = { 4966ad6fde3SJarkko Nikula .probe = dw_i2c_plat_probe, 4976ad6fde3SJarkko Nikula .remove = dw_i2c_plat_remove, 4982373f6b9SDirk Brandewie .driver = { 4992373f6b9SDirk Brandewie .name = "i2c_designware", 500af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match), 501b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), 5028503ff16SJisheng Zhang .pm = DW_I2C_DEV_PMOPS, 5032373f6b9SDirk Brandewie }, 5042373f6b9SDirk Brandewie }; 5052373f6b9SDirk Brandewie 5062373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void) 5072373f6b9SDirk Brandewie { 508cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver); 5092373f6b9SDirk Brandewie } 51010452280SPratyush Anand subsys_initcall(dw_i2c_init_driver); 5112373f6b9SDirk Brandewie 5122373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void) 5132373f6b9SDirk Brandewie { 5142373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver); 5152373f6b9SDirk Brandewie } 5162373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver); 5172373f6b9SDirk Brandewie 5182373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); 5192373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); 5202373f6b9SDirk Brandewie MODULE_LICENSE("GPL"); 521