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
i2c_dw_get_clk_rate_khz(struct dw_i2c_dev * dev)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
bt1_i2c_read(void * context,unsigned int reg,unsigned int * val)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
bt1_i2c_write(void * context,unsigned int reg,unsigned int val)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
bt1_i2c_request_regs(struct dw_i2c_dev * dev)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
mscc_twi_set_sda_hold_time(struct dw_i2c_dev * dev)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
dw_i2c_of_configure(struct platform_device * pdev)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
bt1_i2c_request_regs(struct dw_i2c_dev * dev)160fcb82a93SSerge Semin static int bt1_i2c_request_regs(struct dw_i2c_dev *dev)
161fcb82a93SSerge Semin {
162fcb82a93SSerge Semin return -ENODEV;
163fcb82a93SSerge Semin }
164fcb82a93SSerge Semin
dw_i2c_of_configure(struct platform_device * pdev)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
txgbe_i2c_request_regs(struct dw_i2c_dev * dev)1712f8d1ed7SJiawen Wu static int txgbe_i2c_request_regs(struct dw_i2c_dev *dev)
1722f8d1ed7SJiawen Wu {
1732f8d1ed7SJiawen Wu dev->map = dev_get_regmap(dev->dev->parent, NULL);
1742f8d1ed7SJiawen Wu if (!dev->map)
1752f8d1ed7SJiawen Wu return -ENODEV;
1762f8d1ed7SJiawen Wu
1772f8d1ed7SJiawen Wu return 0;
1782f8d1ed7SJiawen Wu }
1792f8d1ed7SJiawen Wu
dw_i2c_plat_pm_cleanup(struct dw_i2c_dev * dev)180126dbc6bSRafael J. Wysocki static void dw_i2c_plat_pm_cleanup(struct dw_i2c_dev *dev)
181126dbc6bSRafael J. Wysocki {
182126dbc6bSRafael J. Wysocki pm_runtime_disable(dev->dev);
183126dbc6bSRafael J. Wysocki
1849cbeeca0SHans de Goede if (dev->shared_with_punit)
185126dbc6bSRafael J. Wysocki pm_runtime_put_noidle(dev->dev);
186126dbc6bSRafael J. Wysocki }
187126dbc6bSRafael J. Wysocki
dw_i2c_plat_request_regs(struct dw_i2c_dev * dev)188b7c3d077SSerge Semin static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev)
189b7c3d077SSerge Semin {
190b7c3d077SSerge Semin struct platform_device *pdev = to_platform_device(dev->dev);
191fcb82a93SSerge Semin int ret;
192b7c3d077SSerge Semin
193fcb82a93SSerge Semin switch (dev->flags & MODEL_MASK) {
194fcb82a93SSerge Semin case MODEL_BAIKAL_BT1:
195fcb82a93SSerge Semin ret = bt1_i2c_request_regs(dev);
196fcb82a93SSerge Semin break;
1972f8d1ed7SJiawen Wu case MODEL_WANGXUN_SP:
1982f8d1ed7SJiawen Wu ret = txgbe_i2c_request_regs(dev);
1992f8d1ed7SJiawen Wu break;
200fcb82a93SSerge Semin default:
201b7c3d077SSerge Semin dev->base = devm_platform_ioremap_resource(pdev, 0);
202fcb82a93SSerge Semin ret = PTR_ERR_OR_ZERO(dev->base);
203fcb82a93SSerge Semin break;
204fcb82a93SSerge Semin }
205b7c3d077SSerge Semin
206fcb82a93SSerge Semin return ret;
207b7c3d077SSerge Semin }
20890224e64SAndy Shevchenko
209db2a8b6fSRicardo Ribalda static const struct dmi_system_id dw_i2c_hwmon_class_dmi[] = {
210db2a8b6fSRicardo Ribalda {
211db2a8b6fSRicardo Ribalda .ident = "Qtechnology QT5222",
212db2a8b6fSRicardo Ribalda .matches = {
213db2a8b6fSRicardo Ribalda DMI_MATCH(DMI_SYS_VENDOR, "Qtechnology"),
214db2a8b6fSRicardo Ribalda DMI_MATCH(DMI_PRODUCT_NAME, "QT5222"),
215db2a8b6fSRicardo Ribalda },
216db2a8b6fSRicardo Ribalda },
217db2a8b6fSRicardo Ribalda { } /* terminate list */
218db2a8b6fSRicardo Ribalda };
219db2a8b6fSRicardo Ribalda
22078d5e9e2SJan Dabros static const struct i2c_dw_semaphore_callbacks i2c_dw_semaphore_cb_table[] = {
22178d5e9e2SJan Dabros #ifdef CONFIG_I2C_DESIGNWARE_BAYTRAIL
22278d5e9e2SJan Dabros {
22378d5e9e2SJan Dabros .probe = i2c_dw_baytrail_probe_lock_support,
22478d5e9e2SJan Dabros },
22578d5e9e2SJan Dabros #endif
22678d5e9e2SJan Dabros #ifdef CONFIG_I2C_DESIGNWARE_AMDPSP
22778d5e9e2SJan Dabros {
22878d5e9e2SJan Dabros .probe = i2c_dw_amdpsp_probe_lock_support,
22978d5e9e2SJan Dabros },
23078d5e9e2SJan Dabros #endif
23178d5e9e2SJan Dabros {}
23278d5e9e2SJan Dabros };
23378d5e9e2SJan Dabros
i2c_dw_probe_lock_support(struct dw_i2c_dev * dev)23478d5e9e2SJan Dabros static int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev)
23578d5e9e2SJan Dabros {
23678d5e9e2SJan Dabros const struct i2c_dw_semaphore_callbacks *ptr;
23778d5e9e2SJan Dabros int i = 0;
23878d5e9e2SJan Dabros int ret;
23978d5e9e2SJan Dabros
24078d5e9e2SJan Dabros ptr = i2c_dw_semaphore_cb_table;
24178d5e9e2SJan Dabros
24278d5e9e2SJan Dabros dev->semaphore_idx = -1;
24378d5e9e2SJan Dabros
24478d5e9e2SJan Dabros while (ptr->probe) {
24578d5e9e2SJan Dabros ret = ptr->probe(dev);
24678d5e9e2SJan Dabros if (ret) {
24778d5e9e2SJan Dabros /*
24878d5e9e2SJan Dabros * If there is no semaphore device attached to this
24978d5e9e2SJan Dabros * controller, we shouldn't abort general i2c_controller
25078d5e9e2SJan Dabros * probe.
25178d5e9e2SJan Dabros */
25278d5e9e2SJan Dabros if (ret != -ENODEV)
25378d5e9e2SJan Dabros return ret;
25478d5e9e2SJan Dabros
25578d5e9e2SJan Dabros i++;
25678d5e9e2SJan Dabros ptr++;
25778d5e9e2SJan Dabros continue;
25878d5e9e2SJan Dabros }
25978d5e9e2SJan Dabros
26078d5e9e2SJan Dabros dev->semaphore_idx = i;
26178d5e9e2SJan Dabros break;
26278d5e9e2SJan Dabros }
26378d5e9e2SJan Dabros
26478d5e9e2SJan Dabros return 0;
26578d5e9e2SJan Dabros }
26678d5e9e2SJan Dabros
i2c_dw_remove_lock_support(struct dw_i2c_dev * dev)26778d5e9e2SJan Dabros static void i2c_dw_remove_lock_support(struct dw_i2c_dev *dev)
26878d5e9e2SJan Dabros {
26978d5e9e2SJan Dabros if (dev->semaphore_idx < 0)
27078d5e9e2SJan Dabros return;
27178d5e9e2SJan Dabros
27278d5e9e2SJan Dabros if (i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove)
27378d5e9e2SJan Dabros i2c_dw_semaphore_cb_table[dev->semaphore_idx].remove(dev);
27478d5e9e2SJan Dabros }
27578d5e9e2SJan Dabros
dw_i2c_plat_probe(struct platform_device * pdev)2766ad6fde3SJarkko Nikula static int dw_i2c_plat_probe(struct platform_device *pdev)
2772373f6b9SDirk Brandewie {
2782373f6b9SDirk Brandewie struct i2c_adapter *adap;
279e393f674SLuis Oliveira struct dw_i2c_dev *dev;
280e3ea52b5SAndy Shevchenko struct i2c_timings *t;
281f9288fccSAndy Shevchenko int irq, ret;
2822373f6b9SDirk Brandewie
2832373f6b9SDirk Brandewie irq = platform_get_irq(pdev, 0);
284b20d3864SAlexey Brodkin if (irq < 0)
285b20d3864SAlexey Brodkin return irq;
2862373f6b9SDirk Brandewie
2871cb715caSAndy Shevchenko dev = devm_kzalloc(&pdev->dev, sizeof(struct dw_i2c_dev), GFP_KERNEL);
2881cb715caSAndy Shevchenko if (!dev)
2891cb715caSAndy Shevchenko return -ENOMEM;
2902373f6b9SDirk Brandewie
291fac25d7aSSerge Semin dev->flags = (uintptr_t)device_get_match_data(&pdev->dev);
2922f8d1ed7SJiawen Wu if (device_property_present(&pdev->dev, "wx,i2c-snps-model"))
2932f8d1ed7SJiawen Wu dev->flags = MODEL_WANGXUN_SP;
2942f8d1ed7SJiawen Wu
2951cb715caSAndy Shevchenko dev->dev = &pdev->dev;
2962373f6b9SDirk Brandewie dev->irq = irq;
2972373f6b9SDirk Brandewie platform_set_drvdata(pdev, dev);
2982373f6b9SDirk Brandewie
299b7c3d077SSerge Semin ret = dw_i2c_plat_request_regs(dev);
300b7c3d077SSerge Semin if (ret)
301b7c3d077SSerge Semin return ret;
302b7c3d077SSerge Semin
303ab809fd8SZhangfei Gao dev->rst = devm_reset_control_get_optional_exclusive(&pdev->dev, NULL);
304a6af48ecSAndy Shevchenko if (IS_ERR(dev->rst))
305a6af48ecSAndy Shevchenko return PTR_ERR(dev->rst);
306a6af48ecSAndy Shevchenko
307ab809fd8SZhangfei Gao reset_control_deassert(dev->rst);
308ab809fd8SZhangfei Gao
309e3ea52b5SAndy Shevchenko t = &dev->timings;
310e3ea52b5SAndy Shevchenko i2c_parse_fw_timings(&pdev->dev, t, false);
3118e5f6b2aSRomain Baeriswyl
312852f7194SAndy Shevchenko i2c_dw_adjust_bus_speed(dev);
3131732c22aSAlexandre Belloni
3141bb39959SAlexandre Belloni if (pdev->dev.of_node)
3151bb39959SAlexandre Belloni dw_i2c_of_configure(pdev);
3161bb39959SAlexandre Belloni
3174c5301abSMika Westerberg if (has_acpi_companion(&pdev->dev))
318f9288fccSAndy Shevchenko i2c_dw_acpi_configure(&pdev->dev);
3194c5301abSMika Westerberg
32020ee1d90SAndy Shevchenko ret = i2c_dw_validate_speed(dev);
32120ee1d90SAndy Shevchenko if (ret)
322ab809fd8SZhangfei Gao goto exit_reset;
3239803f868SChristian Ruppert
324e393f674SLuis Oliveira ret = i2c_dw_probe_lock_support(dev);
325e393f674SLuis Oliveira if (ret)
326ab809fd8SZhangfei Gao goto exit_reset;
327894acb2fSDavid Box
3283ebe40edSAndy Shevchenko i2c_dw_configure(dev);
3292fa8326bSDirk Brandewie
330c62ebb3dSPhil Edworthy /* Optional interface clock */
331c62ebb3dSPhil Edworthy dev->pclk = devm_clk_get_optional(&pdev->dev, "pclk");
33271dc297cSAndy Shevchenko if (IS_ERR(dev->pclk)) {
33371dc297cSAndy Shevchenko ret = PTR_ERR(dev->pclk);
33471dc297cSAndy Shevchenko goto exit_reset;
33571dc297cSAndy Shevchenko }
336c62ebb3dSPhil Edworthy
33727071b5cSSerge Semin dev->clk = devm_clk_get_optional(&pdev->dev, NULL);
33827071b5cSSerge Semin if (IS_ERR(dev->clk)) {
33927071b5cSSerge Semin ret = PTR_ERR(dev->clk);
34027071b5cSSerge Semin goto exit_reset;
34127071b5cSSerge Semin }
34227071b5cSSerge Semin
34327071b5cSSerge Semin ret = i2c_dw_prepare_clk(dev, true);
34427071b5cSSerge Semin if (ret)
34527071b5cSSerge Semin goto exit_reset;
34627071b5cSSerge Semin
34727071b5cSSerge Semin if (dev->clk) {
348e3ea52b5SAndy Shevchenko u64 clk_khz;
349925ddb24SMika Westerberg
350e3ea52b5SAndy Shevchenko dev->get_clk_rate_khz = i2c_dw_get_clk_rate_khz;
351e3ea52b5SAndy Shevchenko clk_khz = dev->get_clk_rate_khz(dev);
352e3ea52b5SAndy Shevchenko
353e3ea52b5SAndy Shevchenko if (!dev->sda_hold_time && t->sda_hold_ns)
354e3ea52b5SAndy Shevchenko dev->sda_hold_time =
355c045214aSAndy Shevchenko DIV_S64_ROUND_CLOSEST(clk_khz * t->sda_hold_ns, MICRO);
356925ddb24SMika Westerberg }
357925ddb24SMika Westerberg
3582373f6b9SDirk Brandewie adap = &dev->adapter;
3592373f6b9SDirk Brandewie adap->owner = THIS_MODULE;
360db2a8b6fSRicardo Ribalda adap->class = dmi_check_system(dw_i2c_hwmon_class_dmi) ?
361db2a8b6fSRicardo Ribalda I2C_CLASS_HWMON : I2C_CLASS_DEPRECATED;
3628eb5c87aSDustin Byford ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));
363af71100cSRob Herring adap->dev.of_node = pdev->dev.of_node;
36477f3381aSHans de Goede adap->nr = -1;
3652373f6b9SDirk Brandewie
366d79294d0SHans de Goede if (dev->flags & ACCESS_NO_IRQ_SUSPEND) {
367d79294d0SHans de Goede dev_pm_set_driver_flags(&pdev->dev,
36875507a31SRichard Fitzgerald DPM_FLAG_SMART_PREPARE);
369d79294d0SHans de Goede } else {
37002e45646SRafael J. Wysocki dev_pm_set_driver_flags(&pdev->dev,
37102e45646SRafael J. Wysocki DPM_FLAG_SMART_PREPARE |
37275507a31SRichard Fitzgerald DPM_FLAG_SMART_SUSPEND);
373d79294d0SHans de Goede }
374422cb781SRafael J. Wysocki
3757c5b3c15SRajat Jain device_enable_async_suspend(&pdev->dev);
3767c5b3c15SRajat Jain
377126dbc6bSRafael J. Wysocki /* The code below assumes runtime PM to be disabled. */
378126dbc6bSRafael J. Wysocki WARN_ON(pm_runtime_enabled(&pdev->dev));
379126dbc6bSRafael J. Wysocki
38043452335SMika Westerberg pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
38143452335SMika Westerberg pm_runtime_use_autosuspend(&pdev->dev);
3827272194eSMika Westerberg pm_runtime_set_active(&pdev->dev);
383126dbc6bSRafael J. Wysocki
3849cbeeca0SHans de Goede if (dev->shared_with_punit)
385126dbc6bSRafael J. Wysocki pm_runtime_get_noresume(&pdev->dev);
386126dbc6bSRafael J. Wysocki
3877272194eSMika Westerberg pm_runtime_enable(&pdev->dev);
3887272194eSMika Westerberg
389e393f674SLuis Oliveira ret = i2c_dw_probe(dev);
390e393f674SLuis Oliveira if (ret)
391ab809fd8SZhangfei Gao goto exit_probe;
39236d48fb5SWolfram Sang
393e393f674SLuis Oliveira return ret;
394ab809fd8SZhangfei Gao
395ab809fd8SZhangfei Gao exit_probe:
396126dbc6bSRafael J. Wysocki dw_i2c_plat_pm_cleanup(dev);
397ab809fd8SZhangfei Gao exit_reset:
398ab809fd8SZhangfei Gao reset_control_assert(dev->rst);
399e393f674SLuis Oliveira return ret;
4002373f6b9SDirk Brandewie }
4012373f6b9SDirk Brandewie
dw_i2c_plat_remove(struct platform_device * pdev)402e190a0c3SUwe Kleine-König static void dw_i2c_plat_remove(struct platform_device *pdev)
4032373f6b9SDirk Brandewie {
4042373f6b9SDirk Brandewie struct dw_i2c_dev *dev = platform_get_drvdata(pdev);
4052373f6b9SDirk Brandewie
4067272194eSMika Westerberg pm_runtime_get_sync(&pdev->dev);
4077272194eSMika Westerberg
4082373f6b9SDirk Brandewie i2c_del_adapter(&dev->adapter);
4092373f6b9SDirk Brandewie
41090312351SLuis Oliveira dev->disable(dev);
4112373f6b9SDirk Brandewie
412edfc3901SMika Westerberg pm_runtime_dont_use_autosuspend(&pdev->dev);
413edfc3901SMika Westerberg pm_runtime_put_sync(&pdev->dev);
414126dbc6bSRafael J. Wysocki dw_i2c_plat_pm_cleanup(dev);
415126dbc6bSRafael J. Wysocki
41678d5e9e2SJan Dabros i2c_dw_remove_lock_support(dev);
41778d5e9e2SJan Dabros
418ab809fd8SZhangfei Gao reset_control_assert(dev->rst);
4192373f6b9SDirk Brandewie }
4202373f6b9SDirk Brandewie
dw_i2c_plat_prepare(struct device * dev)4216ad6fde3SJarkko Nikula static int dw_i2c_plat_prepare(struct device *dev)
4228503ff16SJisheng Zhang {
423422cb781SRafael J. Wysocki /*
424422cb781SRafael J. Wysocki * If the ACPI companion device object is present for this device, it
425422cb781SRafael J. Wysocki * may be accessed during suspend and resume of other devices via I2C
426422cb781SRafael J. Wysocki * operation regions, so tell the PM core and middle layers to avoid
427422cb781SRafael J. Wysocki * skipping system suspend/resume callbacks for it in that case.
428422cb781SRafael J. Wysocki */
429422cb781SRafael J. Wysocki return !has_acpi_companion(dev);
4308503ff16SJisheng Zhang }
4318503ff16SJisheng Zhang
dw_i2c_plat_runtime_suspend(struct device * dev)432c57813b8SHans de Goede static int dw_i2c_plat_runtime_suspend(struct device *dev)
4333bf3b289SDeepak Sikri {
4349242e72aSMasahiro Yamada struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
4353bf3b289SDeepak Sikri
4369cbeeca0SHans de Goede if (i_dev->shared_with_punit)
4379d9a152eSHans de Goede return 0;
4389d9a152eSHans de Goede
43990312351SLuis Oliveira i_dev->disable(i_dev);
4400326f9f8SPhil Reid i2c_dw_prepare_clk(i_dev, false);
4413bf3b289SDeepak Sikri
4423bf3b289SDeepak Sikri return 0;
4433bf3b289SDeepak Sikri }
4443bf3b289SDeepak Sikri
dw_i2c_plat_suspend(struct device * dev)445*a9e4d8b6SPaul Cercueil static int dw_i2c_plat_suspend(struct device *dev)
446c57813b8SHans de Goede {
447c57813b8SHans de Goede struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
448c57813b8SHans de Goede
44980704a84SHans de Goede i2c_mark_adapter_suspended(&i_dev->adapter);
450c57813b8SHans de Goede
451c57813b8SHans de Goede return dw_i2c_plat_runtime_suspend(dev);
452c57813b8SHans de Goede }
453c57813b8SHans de Goede
dw_i2c_plat_runtime_resume(struct device * dev)454c57813b8SHans de Goede static int dw_i2c_plat_runtime_resume(struct device *dev)
4553bf3b289SDeepak Sikri {
4569242e72aSMasahiro Yamada struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
4573bf3b289SDeepak Sikri
4589cbeeca0SHans de Goede if (!i_dev->shared_with_punit)
4590326f9f8SPhil Reid i2c_dw_prepare_clk(i_dev, true);
4609d9a152eSHans de Goede
46190312351SLuis Oliveira i_dev->init(i_dev);
462c57813b8SHans de Goede
463c57813b8SHans de Goede return 0;
464c57813b8SHans de Goede }
465c57813b8SHans de Goede
dw_i2c_plat_resume(struct device * dev)466*a9e4d8b6SPaul Cercueil static int dw_i2c_plat_resume(struct device *dev)
467c57813b8SHans de Goede {
468c57813b8SHans de Goede struct dw_i2c_dev *i_dev = dev_get_drvdata(dev);
469c57813b8SHans de Goede
470c57813b8SHans de Goede dw_i2c_plat_runtime_resume(dev);
47180704a84SHans de Goede i2c_mark_adapter_resumed(&i_dev->adapter);
4723bf3b289SDeepak Sikri
4733bf3b289SDeepak Sikri return 0;
4743bf3b289SDeepak Sikri }
4753bf3b289SDeepak Sikri
4768503ff16SJisheng Zhang static const struct dev_pm_ops dw_i2c_dev_pm_ops = {
477*a9e4d8b6SPaul Cercueil .prepare = pm_sleep_ptr(dw_i2c_plat_prepare),
478*a9e4d8b6SPaul Cercueil LATE_SYSTEM_SLEEP_PM_OPS(dw_i2c_plat_suspend, dw_i2c_plat_resume)
479*a9e4d8b6SPaul Cercueil RUNTIME_PM_OPS(dw_i2c_plat_runtime_suspend, dw_i2c_plat_runtime_resume, NULL)
4808503ff16SJisheng Zhang };
4818503ff16SJisheng Zhang
482e393f674SLuis Oliveira /* Work with hotplug and coldplug */
4832373f6b9SDirk Brandewie MODULE_ALIAS("platform:i2c_designware");
4842373f6b9SDirk Brandewie
4852373f6b9SDirk Brandewie static struct platform_driver dw_i2c_driver = {
4866ad6fde3SJarkko Nikula .probe = dw_i2c_plat_probe,
487e190a0c3SUwe Kleine-König .remove_new = dw_i2c_plat_remove,
4882373f6b9SDirk Brandewie .driver = {
4892373f6b9SDirk Brandewie .name = "i2c_designware",
490af71100cSRob Herring .of_match_table = of_match_ptr(dw_i2c_of_match),
491b61b1415SMika Westerberg .acpi_match_table = ACPI_PTR(dw_i2c_acpi_match),
492*a9e4d8b6SPaul Cercueil .pm = pm_ptr(&dw_i2c_dev_pm_ops),
4932373f6b9SDirk Brandewie },
4942373f6b9SDirk Brandewie };
4952373f6b9SDirk Brandewie
dw_i2c_init_driver(void)4962373f6b9SDirk Brandewie static int __init dw_i2c_init_driver(void)
4972373f6b9SDirk Brandewie {
498cccdcea1SWolfram Sang return platform_driver_register(&dw_i2c_driver);
4992373f6b9SDirk Brandewie }
50010452280SPratyush Anand subsys_initcall(dw_i2c_init_driver);
5012373f6b9SDirk Brandewie
dw_i2c_exit_driver(void)5022373f6b9SDirk Brandewie static void __exit dw_i2c_exit_driver(void)
5032373f6b9SDirk Brandewie {
5042373f6b9SDirk Brandewie platform_driver_unregister(&dw_i2c_driver);
5052373f6b9SDirk Brandewie }
5062373f6b9SDirk Brandewie module_exit(dw_i2c_exit_driver);
5072373f6b9SDirk Brandewie
5082373f6b9SDirk Brandewie MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
5092373f6b9SDirk Brandewie MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter");
5102373f6b9SDirk Brandewie MODULE_LICENSE("GPL");
511