Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Synopsys DesignWare I2C adapter driver (master only). |
| 3 | * |
| 4 | * Based on the TI DAVINCI I2C adapter driver. |
| 5 | * |
| 6 | * Copyright (C) 2006 Texas Instruments. |
| 7 | * Copyright (C) 2007 MontaVista Software Inc. |
| 8 | * Copyright (C) 2009 Provigent Ltd. |
| 9 | * |
| 10 | * ---------------------------------------------------------------------------- |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | * |
| 17 | * This program is distributed in the hope that it will be useful, |
| 18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 20 | * GNU General Public License for more details. |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 21 | * ---------------------------------------------------------------------------- |
| 22 | * |
| 23 | */ |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/delay.h> |
Mika Westerberg | 56d4b8a | 2015-09-24 12:06:54 +0300 | [diff] [blame] | 27 | #include <linux/dmi.h> |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 28 | #include <linux/i2c.h> |
| 29 | #include <linux/clk.h> |
Carl Peng | a445900 | 2014-09-30 13:04:55 +0300 | [diff] [blame] | 30 | #include <linux/clk-provider.h> |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 31 | #include <linux/errno.h> |
| 32 | #include <linux/sched.h> |
| 33 | #include <linux/err.h> |
| 34 | #include <linux/interrupt.h> |
Christian Ruppert | 9803f86 | 2013-06-26 10:55:06 +0200 | [diff] [blame] | 35 | #include <linux/of.h> |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 36 | #include <linux/platform_device.h> |
Deepak Sikri | 3bf3b28 | 2012-02-24 17:01:15 +0530 | [diff] [blame] | 37 | #include <linux/pm.h> |
Mika Westerberg | 7272194 | 2013-01-17 12:31:06 +0200 | [diff] [blame] | 38 | #include <linux/pm_runtime.h> |
Mika Westerberg | 4c5301a | 2015-11-30 17:11:44 +0200 | [diff] [blame] | 39 | #include <linux/property.h> |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 40 | #include <linux/io.h> |
| 41 | #include <linux/slab.h> |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 42 | #include <linux/acpi.h> |
Tan, Raymond | 4bcfda0 | 2014-09-03 10:41:38 +0800 | [diff] [blame] | 43 | #include <linux/platform_data/i2c-designware.h> |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 44 | #include "i2c-designware-core.h" |
| 45 | |
Dirk Brandewie | 1d31b58 | 2011-10-06 11:26:30 -0700 | [diff] [blame] | 46 | static u32 i2c_dw_get_clk_rate_khz(struct dw_i2c_dev *dev) |
| 47 | { |
| 48 | return clk_get_rate(dev->clk)/1000; |
| 49 | } |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 50 | |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 51 | #ifdef CONFIG_ACPI |
Mika Westerberg | 56d4b8a | 2015-09-24 12:06:54 +0300 | [diff] [blame] | 52 | /* |
| 53 | * The HCNT/LCNT information coming from ACPI should be the most accurate |
| 54 | * for given platform. However, some systems get it wrong. On such systems |
| 55 | * we get better results by calculating those based on the input clock. |
| 56 | */ |
| 57 | static const struct dmi_system_id dw_i2c_no_acpi_params[] = { |
| 58 | { |
| 59 | .ident = "Dell Inspiron 7348", |
| 60 | .matches = { |
| 61 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), |
| 62 | DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7348"), |
| 63 | }, |
| 64 | }, |
| 65 | { } |
| 66 | }; |
| 67 | |
Mika Westerberg | 57cd1e3 | 2013-08-19 15:07:54 +0300 | [diff] [blame] | 68 | static void dw_i2c_acpi_params(struct platform_device *pdev, char method[], |
| 69 | u16 *hcnt, u16 *lcnt, u32 *sda_hold) |
| 70 | { |
| 71 | struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER }; |
| 72 | acpi_handle handle = ACPI_HANDLE(&pdev->dev); |
| 73 | union acpi_object *obj; |
| 74 | |
Mika Westerberg | 56d4b8a | 2015-09-24 12:06:54 +0300 | [diff] [blame] | 75 | if (dmi_check_system(dw_i2c_no_acpi_params)) |
| 76 | return; |
| 77 | |
Mika Westerberg | 57cd1e3 | 2013-08-19 15:07:54 +0300 | [diff] [blame] | 78 | if (ACPI_FAILURE(acpi_evaluate_object(handle, method, NULL, &buf))) |
| 79 | return; |
| 80 | |
| 81 | obj = (union acpi_object *)buf.pointer; |
| 82 | if (obj->type == ACPI_TYPE_PACKAGE && obj->package.count == 3) { |
| 83 | const union acpi_object *objs = obj->package.elements; |
| 84 | |
| 85 | *hcnt = (u16)objs[0].integer.value; |
| 86 | *lcnt = (u16)objs[1].integer.value; |
| 87 | if (sda_hold) |
| 88 | *sda_hold = (u32)objs[2].integer.value; |
| 89 | } |
| 90 | |
| 91 | kfree(buf.pointer); |
| 92 | } |
| 93 | |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 94 | static int dw_i2c_acpi_configure(struct platform_device *pdev) |
| 95 | { |
| 96 | struct dw_i2c_dev *dev = platform_get_drvdata(pdev); |
Xiangliang Yu | 2d244c8 | 2015-12-11 20:02:53 +0800 | [diff] [blame] | 97 | const struct acpi_device_id *id; |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 98 | |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 99 | dev->adapter.nr = -1; |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 100 | dev->tx_fifo_depth = 32; |
| 101 | dev->rx_fifo_depth = 32; |
Mika Westerberg | 57cd1e3 | 2013-08-19 15:07:54 +0300 | [diff] [blame] | 102 | |
| 103 | /* |
| 104 | * Try to get SDA hold time and *CNT values from an ACPI method if |
| 105 | * it exists for both supported speed modes. |
| 106 | */ |
Mika Westerberg | 0b26c84 | 2014-09-30 13:04:53 +0300 | [diff] [blame] | 107 | dw_i2c_acpi_params(pdev, "SSCN", &dev->ss_hcnt, &dev->ss_lcnt, NULL); |
Mika Westerberg | 57cd1e3 | 2013-08-19 15:07:54 +0300 | [diff] [blame] | 108 | dw_i2c_acpi_params(pdev, "FMCN", &dev->fs_hcnt, &dev->fs_lcnt, |
Mika Westerberg | 0b26c84 | 2014-09-30 13:04:53 +0300 | [diff] [blame] | 109 | &dev->sda_hold_time); |
Weifeng Voon | a92ec17 | 2016-08-12 17:02:48 +0300 | [diff] [blame^] | 110 | dw_i2c_acpi_params(pdev, "FPCN", &dev->fp_hcnt, &dev->fp_lcnt, NULL); |
| 111 | dw_i2c_acpi_params(pdev, "HSCN", &dev->hs_hcnt, &dev->hs_lcnt, NULL); |
Mika Westerberg | 57cd1e3 | 2013-08-19 15:07:54 +0300 | [diff] [blame] | 112 | |
Xiangliang Yu | 2d244c8 | 2015-12-11 20:02:53 +0800 | [diff] [blame] | 113 | id = acpi_match_device(pdev->dev.driver->acpi_match_table, &pdev->dev); |
| 114 | if (id && id->driver_data) |
| 115 | dev->accessor_flags |= (u32)id->driver_data; |
| 116 | |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | static const struct acpi_device_id dw_i2c_acpi_match[] = { |
| 121 | { "INT33C2", 0 }, |
| 122 | { "INT33C3", 0 }, |
Mika Westerberg | 25b3dfc | 2013-11-12 11:57:30 +0200 | [diff] [blame] | 123 | { "INT3432", 0 }, |
| 124 | { "INT3433", 0 }, |
Mika Westerberg | 5a7e6bd | 2013-05-13 00:54:31 +0000 | [diff] [blame] | 125 | { "80860F41", 0 }, |
Alan Cox | 0409516 | 2014-07-23 13:06:57 +0100 | [diff] [blame] | 126 | { "808622C1", 0 }, |
Xiangliang Yu | 2d244c8 | 2015-12-11 20:02:53 +0800 | [diff] [blame] | 127 | { "AMD0010", ACCESS_INTR_MASK }, |
Xiangliang Yu | e4e666b | 2016-03-10 19:34:52 +0800 | [diff] [blame] | 128 | { "AMDI0010", ACCESS_INTR_MASK }, |
Suravee Suthikulpanit | 90708ce | 2015-12-15 15:55:53 -0600 | [diff] [blame] | 129 | { "AMDI0510", 0 }, |
Loc Ho | 04a407f | 2015-12-10 14:19:17 -0700 | [diff] [blame] | 130 | { "APMC0D0F", 0 }, |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 131 | { } |
| 132 | }; |
| 133 | MODULE_DEVICE_TABLE(acpi, dw_i2c_acpi_match); |
| 134 | #else |
| 135 | static inline int dw_i2c_acpi_configure(struct platform_device *pdev) |
| 136 | { |
| 137 | return -ENODEV; |
| 138 | } |
| 139 | #endif |
| 140 | |
Suravee Suthikulpanit | b33af11 | 2016-01-04 09:17:35 -0600 | [diff] [blame] | 141 | static int i2c_dw_plat_prepare_clk(struct dw_i2c_dev *i_dev, bool prepare) |
| 142 | { |
| 143 | if (IS_ERR(i_dev->clk)) |
| 144 | return PTR_ERR(i_dev->clk); |
| 145 | |
| 146 | if (prepare) |
| 147 | return clk_prepare_enable(i_dev->clk); |
| 148 | |
| 149 | clk_disable_unprepare(i_dev->clk); |
| 150 | return 0; |
| 151 | } |
| 152 | |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 153 | static int dw_i2c_plat_probe(struct platform_device *pdev) |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 154 | { |
Mika Westerberg | 4c5301a | 2015-11-30 17:11:44 +0200 | [diff] [blame] | 155 | struct dw_i2c_platform_data *pdata = dev_get_platdata(&pdev->dev); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 156 | struct dw_i2c_dev *dev; |
| 157 | struct i2c_adapter *adap; |
Andy Shevchenko | 1cb715c | 2013-04-10 00:36:36 +0000 | [diff] [blame] | 158 | struct resource *mem; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 159 | int irq, r; |
Weifeng Voon | 19c0a53 | 2016-08-12 17:02:47 +0300 | [diff] [blame] | 160 | u32 ht = 0; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 161 | |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 162 | irq = platform_get_irq(pdev, 0); |
Alexey Brodkin | b20d386 | 2015-03-09 12:03:12 +0300 | [diff] [blame] | 163 | if (irq < 0) |
| 164 | return irq; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 165 | |
Andy Shevchenko | 1cb715c | 2013-04-10 00:36:36 +0000 | [diff] [blame] | 166 | dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL); |
| 167 | if (!dev) |
| 168 | return -ENOMEM; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 169 | |
Wolfram Sang | 3cc2d00 | 2013-05-10 10:16:54 +0200 | [diff] [blame] | 170 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Andy Shevchenko | 1cb715c | 2013-04-10 00:36:36 +0000 | [diff] [blame] | 171 | dev->base = devm_ioremap_resource(&pdev->dev, mem); |
| 172 | if (IS_ERR(dev->base)) |
| 173 | return PTR_ERR(dev->base); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 174 | |
Andy Shevchenko | 1cb715c | 2013-04-10 00:36:36 +0000 | [diff] [blame] | 175 | dev->dev = &pdev->dev; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 176 | dev->irq = irq; |
| 177 | platform_set_drvdata(pdev, dev); |
| 178 | |
Romain Baeriswyl | 8e5f6b2 | 2014-08-20 16:29:08 +0200 | [diff] [blame] | 179 | /* fast mode by default because of legacy reasons */ |
Weifeng Voon | 19c0a53 | 2016-08-12 17:02:47 +0300 | [diff] [blame] | 180 | dev->clk_freq = 400000; |
Romain Baeriswyl | 8e5f6b2 | 2014-08-20 16:29:08 +0200 | [diff] [blame] | 181 | |
Mika Westerberg | 4c5301a | 2015-11-30 17:11:44 +0200 | [diff] [blame] | 182 | if (pdata) { |
Weifeng Voon | 19c0a53 | 2016-08-12 17:02:47 +0300 | [diff] [blame] | 183 | dev->clk_freq = pdata->i2c_scl_freq; |
Tan, Raymond | 4bcfda0 | 2014-09-03 10:41:38 +0800 | [diff] [blame] | 184 | } else { |
Mika Westerberg | 4c5301a | 2015-11-30 17:11:44 +0200 | [diff] [blame] | 185 | device_property_read_u32(&pdev->dev, "i2c-sda-hold-time-ns", |
| 186 | &ht); |
| 187 | device_property_read_u32(&pdev->dev, "i2c-sda-falling-time-ns", |
| 188 | &dev->sda_falling_time); |
| 189 | device_property_read_u32(&pdev->dev, "i2c-scl-falling-time-ns", |
| 190 | &dev->scl_falling_time); |
| 191 | device_property_read_u32(&pdev->dev, "clock-frequency", |
Weifeng Voon | 19c0a53 | 2016-08-12 17:02:47 +0300 | [diff] [blame] | 192 | &dev->clk_freq); |
Mika Westerberg | 4c5301a | 2015-11-30 17:11:44 +0200 | [diff] [blame] | 193 | } |
| 194 | |
| 195 | if (has_acpi_companion(&pdev->dev)) |
| 196 | dw_i2c_acpi_configure(pdev); |
| 197 | |
| 198 | /* |
| 199 | * Only standard mode at 100kHz and fast mode at 400kHz are supported. |
| 200 | */ |
Weifeng Voon | 19c0a53 | 2016-08-12 17:02:47 +0300 | [diff] [blame] | 201 | if (dev->clk_freq != 100000 && dev->clk_freq != 400000) { |
Mika Westerberg | 4c5301a | 2015-11-30 17:11:44 +0200 | [diff] [blame] | 202 | dev_err(&pdev->dev, "Only 100kHz and 400kHz supported"); |
| 203 | return -EINVAL; |
Christian Ruppert | 9803f86 | 2013-06-26 10:55:06 +0200 | [diff] [blame] | 204 | } |
| 205 | |
David Box | 894acb2 | 2015-01-15 01:12:17 -0800 | [diff] [blame] | 206 | r = i2c_dw_eval_lock_support(dev); |
| 207 | if (r) |
| 208 | return r; |
| 209 | |
Dirk Brandewie | 2fa8326 | 2011-10-06 11:26:31 -0700 | [diff] [blame] | 210 | dev->functionality = |
| 211 | I2C_FUNC_I2C | |
| 212 | I2C_FUNC_10BIT_ADDR | |
| 213 | I2C_FUNC_SMBUS_BYTE | |
| 214 | I2C_FUNC_SMBUS_BYTE_DATA | |
| 215 | I2C_FUNC_SMBUS_WORD_DATA | |
| 216 | I2C_FUNC_SMBUS_I2C_BLOCK; |
Weifeng Voon | 19c0a53 | 2016-08-12 17:02:47 +0300 | [diff] [blame] | 217 | if (dev->clk_freq == 100000) |
Romain Baeriswyl | 8e5f6b2 | 2014-08-20 16:29:08 +0200 | [diff] [blame] | 218 | dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | |
| 219 | DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_STD; |
| 220 | else |
| 221 | dev->master_cfg = DW_IC_CON_MASTER | DW_IC_CON_SLAVE_DISABLE | |
| 222 | DW_IC_CON_RESTART_EN | DW_IC_CON_SPEED_FAST; |
Dirk Brandewie | 2fa8326 | 2011-10-06 11:26:31 -0700 | [diff] [blame] | 223 | |
Mika Westerberg | 925ddb2 | 2014-09-30 13:04:54 +0300 | [diff] [blame] | 224 | dev->clk = devm_clk_get(&pdev->dev, NULL); |
Suravee Suthikulpanit | b33af11 | 2016-01-04 09:17:35 -0600 | [diff] [blame] | 225 | if (!i2c_dw_plat_prepare_clk(dev, true)) { |
| 226 | dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz; |
Mika Westerberg | 925ddb2 | 2014-09-30 13:04:54 +0300 | [diff] [blame] | 227 | |
Suravee Suthikulpanit | b33af11 | 2016-01-04 09:17:35 -0600 | [diff] [blame] | 228 | if (!dev->sda_hold_time && ht) |
| 229 | dev->sda_hold_time = div_u64( |
| 230 | (u64)dev->get_clk_rate_khz(dev) * ht + 500000, |
| 231 | 1000000); |
Mika Westerberg | 925ddb2 | 2014-09-30 13:04:54 +0300 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | if (!dev->tx_fifo_depth) { |
Dirk Brandewie | f3fa9f3 | 2011-10-06 11:26:34 -0700 | [diff] [blame] | 235 | u32 param1 = i2c_dw_read_comp_param(dev); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 236 | |
| 237 | dev->tx_fifo_depth = ((param1 >> 16) & 0xff) + 1; |
| 238 | dev->rx_fifo_depth = ((param1 >> 8) & 0xff) + 1; |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 239 | dev->adapter.nr = pdev->id; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 240 | } |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 241 | |
| 242 | adap = &dev->adapter; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 243 | adap->owner = THIS_MODULE; |
Wolfram Sang | 70fba83 | 2014-07-10 13:46:26 +0200 | [diff] [blame] | 244 | adap->class = I2C_CLASS_DEPRECATED; |
Dustin Byford | 8eb5c87 | 2015-10-23 12:27:07 -0700 | [diff] [blame] | 245 | ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev)); |
Rob Herring | af71100 | 2011-11-08 14:43:47 -0600 | [diff] [blame] | 246 | adap->dev.of_node = pdev->dev.of_node; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 247 | |
David Box | 894acb2 | 2015-01-15 01:12:17 -0800 | [diff] [blame] | 248 | if (dev->pm_runtime_disabled) { |
| 249 | pm_runtime_forbid(&pdev->dev); |
| 250 | } else { |
| 251 | pm_runtime_set_autosuspend_delay(&pdev->dev, 1000); |
| 252 | pm_runtime_use_autosuspend(&pdev->dev); |
| 253 | pm_runtime_set_active(&pdev->dev); |
| 254 | pm_runtime_enable(&pdev->dev); |
| 255 | } |
Mika Westerberg | 7272194 | 2013-01-17 12:31:06 +0200 | [diff] [blame] | 256 | |
Linus Torvalds | d55fc37 | 2015-11-10 11:58:25 -0800 | [diff] [blame] | 257 | r = i2c_dw_probe(dev); |
Jarkko Nikula | e79e72c | 2015-12-10 13:48:43 +0200 | [diff] [blame] | 258 | if (r && !dev->pm_runtime_disabled) |
Wolfram Sang | 36d48fb | 2015-10-09 10:39:24 +0100 | [diff] [blame] | 259 | pm_runtime_disable(&pdev->dev); |
Wolfram Sang | 36d48fb | 2015-10-09 10:39:24 +0100 | [diff] [blame] | 260 | |
Jarkko Nikula | e79e72c | 2015-12-10 13:48:43 +0200 | [diff] [blame] | 261 | return r; |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 262 | } |
| 263 | |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 264 | static int dw_i2c_plat_remove(struct platform_device *pdev) |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 265 | { |
| 266 | struct dw_i2c_dev *dev = platform_get_drvdata(pdev); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 267 | |
Mika Westerberg | 7272194 | 2013-01-17 12:31:06 +0200 | [diff] [blame] | 268 | pm_runtime_get_sync(&pdev->dev); |
| 269 | |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 270 | i2c_del_adapter(&dev->adapter); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 271 | |
Dirk Brandewie | f3fa9f3 | 2011-10-06 11:26:34 -0700 | [diff] [blame] | 272 | i2c_dw_disable(dev); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 273 | |
Mika Westerberg | edfc390 | 2015-06-17 12:08:38 +0300 | [diff] [blame] | 274 | pm_runtime_dont_use_autosuspend(&pdev->dev); |
| 275 | pm_runtime_put_sync(&pdev->dev); |
Jarkko Nikula | e79e72c | 2015-12-10 13:48:43 +0200 | [diff] [blame] | 276 | if (!dev->pm_runtime_disabled) |
| 277 | pm_runtime_disable(&pdev->dev); |
Mika Westerberg | 7272194 | 2013-01-17 12:31:06 +0200 | [diff] [blame] | 278 | |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 279 | return 0; |
| 280 | } |
| 281 | |
Rob Herring | af71100 | 2011-11-08 14:43:47 -0600 | [diff] [blame] | 282 | #ifdef CONFIG_OF |
| 283 | static const struct of_device_id dw_i2c_of_match[] = { |
| 284 | { .compatible = "snps,designware-i2c", }, |
| 285 | {}, |
| 286 | }; |
| 287 | MODULE_DEVICE_TABLE(of, dw_i2c_of_match); |
| 288 | #endif |
| 289 | |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 290 | #ifdef CONFIG_PM_SLEEP |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 291 | static int dw_i2c_plat_prepare(struct device *dev) |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 292 | { |
| 293 | return pm_runtime_suspended(dev); |
| 294 | } |
| 295 | |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 296 | static void dw_i2c_plat_complete(struct device *dev) |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 297 | { |
| 298 | if (dev->power.direct_complete) |
| 299 | pm_request_resume(dev); |
| 300 | } |
| 301 | #else |
Jarkko Nikula | 319d7f0 | 2015-10-21 10:09:17 +0300 | [diff] [blame] | 302 | #define dw_i2c_plat_prepare NULL |
| 303 | #define dw_i2c_plat_complete NULL |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 304 | #endif |
| 305 | |
Mika Westerberg | 1fc2fe2 | 2014-05-15 17:37:23 +0300 | [diff] [blame] | 306 | #ifdef CONFIG_PM |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 307 | static int dw_i2c_plat_suspend(struct device *dev) |
Deepak Sikri | 3bf3b28 | 2012-02-24 17:01:15 +0530 | [diff] [blame] | 308 | { |
| 309 | struct platform_device *pdev = to_platform_device(dev); |
| 310 | struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); |
| 311 | |
Mika Westerberg | f537295 | 2014-05-15 17:37:22 +0300 | [diff] [blame] | 312 | i2c_dw_disable(i_dev); |
Suravee Suthikulpanit | b33af11 | 2016-01-04 09:17:35 -0600 | [diff] [blame] | 313 | i2c_dw_plat_prepare_clk(i_dev, false); |
Deepak Sikri | 3bf3b28 | 2012-02-24 17:01:15 +0530 | [diff] [blame] | 314 | |
| 315 | return 0; |
| 316 | } |
| 317 | |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 318 | static int dw_i2c_plat_resume(struct device *dev) |
Deepak Sikri | 3bf3b28 | 2012-02-24 17:01:15 +0530 | [diff] [blame] | 319 | { |
| 320 | struct platform_device *pdev = to_platform_device(dev); |
| 321 | struct dw_i2c_dev *i_dev = platform_get_drvdata(pdev); |
| 322 | |
Suravee Suthikulpanit | b33af11 | 2016-01-04 09:17:35 -0600 | [diff] [blame] | 323 | i2c_dw_plat_prepare_clk(i_dev, true); |
David Box | 894acb2 | 2015-01-15 01:12:17 -0800 | [diff] [blame] | 324 | |
| 325 | if (!i_dev->pm_runtime_disabled) |
| 326 | i2c_dw_init(i_dev); |
Deepak Sikri | 3bf3b28 | 2012-02-24 17:01:15 +0530 | [diff] [blame] | 327 | |
| 328 | return 0; |
| 329 | } |
Deepak Sikri | 3bf3b28 | 2012-02-24 17:01:15 +0530 | [diff] [blame] | 330 | |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 331 | static const struct dev_pm_ops dw_i2c_dev_pm_ops = { |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 332 | .prepare = dw_i2c_plat_prepare, |
| 333 | .complete = dw_i2c_plat_complete, |
| 334 | SET_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume) |
| 335 | SET_RUNTIME_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume, NULL) |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 336 | }; |
| 337 | |
| 338 | #define DW_I2C_DEV_PMOPS (&dw_i2c_dev_pm_ops) |
| 339 | #else |
| 340 | #define DW_I2C_DEV_PMOPS NULL |
| 341 | #endif |
Mika Westerberg | 1fc2fe2 | 2014-05-15 17:37:23 +0300 | [diff] [blame] | 342 | |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 343 | /* work with hotplug and coldplug */ |
| 344 | MODULE_ALIAS("platform:i2c_designware"); |
| 345 | |
| 346 | static struct platform_driver dw_i2c_driver = { |
Jarkko Nikula | 6ad6fde | 2015-08-31 17:31:32 +0300 | [diff] [blame] | 347 | .probe = dw_i2c_plat_probe, |
| 348 | .remove = dw_i2c_plat_remove, |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 349 | .driver = { |
| 350 | .name = "i2c_designware", |
Rob Herring | af71100 | 2011-11-08 14:43:47 -0600 | [diff] [blame] | 351 | .of_match_table = of_match_ptr(dw_i2c_of_match), |
Mika Westerberg | b61b141 | 2013-01-17 12:31:07 +0200 | [diff] [blame] | 352 | .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match), |
Jisheng Zhang | 8503ff1 | 2015-05-20 22:33:13 +0800 | [diff] [blame] | 353 | .pm = DW_I2C_DEV_PMOPS, |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 354 | }, |
| 355 | }; |
| 356 | |
| 357 | static int __init dw_i2c_init_driver(void) |
| 358 | { |
Wolfram Sang | cccdcea | 2013-10-08 22:35:33 +0200 | [diff] [blame] | 359 | return platform_driver_register(&dw_i2c_driver); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 360 | } |
Pratyush Anand | 1045228 | 2012-02-29 12:27:46 +0530 | [diff] [blame] | 361 | subsys_initcall(dw_i2c_init_driver); |
Dirk Brandewie | 2373f6b | 2011-10-29 10:57:23 +0100 | [diff] [blame] | 362 | |
| 363 | static void __exit dw_i2c_exit_driver(void) |
| 364 | { |
| 365 | platform_driver_unregister(&dw_i2c_driver); |
| 366 | } |
| 367 | module_exit(dw_i2c_exit_driver); |
| 368 | |
| 369 | MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>"); |
| 370 | MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter"); |
| 371 | MODULE_LICENSE("GPL"); |