1 // SPDX-License-Identifier: GPL-2.0+
3  * Based on Synopsys DesignWare I2C adapter driver.
13 #include "i2c-designware-core.h"
20 	pm_runtime_disable(i2c_dev->dev);  in amd_isp_dw_i2c_plat_pm_cleanup()
22 	if (i2c_dev->shared_with_punit)  in amd_isp_dw_i2c_plat_pm_cleanup()
23 		pm_runtime_put_noidle(i2c_dev->dev);  in amd_isp_dw_i2c_plat_pm_cleanup()
37 	isp_i2c_dev = devm_kzalloc(&pdev->dev, sizeof(*isp_i2c_dev), GFP_KERNEL);  in amd_isp_dw_i2c_plat_probe()
39 		return -ENOMEM;  in amd_isp_dw_i2c_plat_probe()
40 	isp_i2c_dev->dev = &pdev->dev;  in amd_isp_dw_i2c_plat_probe()
42 	pdev->dev.init_name = DRV_NAME;  in amd_isp_dw_i2c_plat_probe()
46 	 * no IRQ connection from ISP I2C  in amd_isp_dw_i2c_plat_probe()
48 	isp_i2c_dev->flags |= ACCESS_POLLING;  in amd_isp_dw_i2c_plat_probe()
51 	isp_i2c_dev->base = devm_platform_ioremap_resource(pdev, 0);  in amd_isp_dw_i2c_plat_probe()
52 	if (IS_ERR(isp_i2c_dev->base))  in amd_isp_dw_i2c_plat_probe()
53 		return dev_err_probe(&pdev->dev, PTR_ERR(isp_i2c_dev->base),  in amd_isp_dw_i2c_plat_probe()
56 	isp_i2c_dev->get_clk_rate_khz = amd_isp_dw_i2c_get_clk_rate;  in amd_isp_dw_i2c_plat_probe()
59 		return dev_err_probe(&pdev->dev, ret,  in amd_isp_dw_i2c_plat_probe()
60 				     "failed to parse i2c dw fwnode and configure\n");  in amd_isp_dw_i2c_plat_probe()
64 	adap = &isp_i2c_dev->adapter;  in amd_isp_dw_i2c_plat_probe()
65 	adap->owner = THIS_MODULE;  in amd_isp_dw_i2c_plat_probe()
66 	scnprintf(adap->name, sizeof(adap->name), AMDISP_I2C_ADAP_NAME);  in amd_isp_dw_i2c_plat_probe()
67 	ACPI_COMPANION_SET(&adap->dev, ACPI_COMPANION(&pdev->dev));  in amd_isp_dw_i2c_plat_probe()
68 	adap->dev.of_node = pdev->dev.of_node;  in amd_isp_dw_i2c_plat_probe()
70 	adap->nr = -1;  in amd_isp_dw_i2c_plat_probe()
72 	if (isp_i2c_dev->flags & ACCESS_NO_IRQ_SUSPEND)  in amd_isp_dw_i2c_plat_probe()
73 		dev_pm_set_driver_flags(&pdev->dev,  in amd_isp_dw_i2c_plat_probe()
76 		dev_pm_set_driver_flags(&pdev->dev,  in amd_isp_dw_i2c_plat_probe()
80 	device_enable_async_suspend(&pdev->dev);  in amd_isp_dw_i2c_plat_probe()
82 	if (isp_i2c_dev->shared_with_punit)  in amd_isp_dw_i2c_plat_probe()
83 		pm_runtime_get_noresume(&pdev->dev);  in amd_isp_dw_i2c_plat_probe()
85 	pm_runtime_enable(&pdev->dev);  in amd_isp_dw_i2c_plat_probe()
86 	pm_runtime_get_sync(&pdev->dev);  in amd_isp_dw_i2c_plat_probe()
90 		dev_err_probe(&pdev->dev, ret, "i2c_dw_probe failed\n");  in amd_isp_dw_i2c_plat_probe()
94 	pm_runtime_put_sync(&pdev->dev);  in amd_isp_dw_i2c_plat_probe()
100 	pm_runtime_put_sync(&pdev->dev);  in amd_isp_dw_i2c_plat_probe()
108 	pm_runtime_get_sync(&pdev->dev);  in amd_isp_dw_i2c_plat_remove()
110 	i2c_del_adapter(&isp_i2c_dev->adapter);  in amd_isp_dw_i2c_plat_remove()
114 	pm_runtime_put_sync(&pdev->dev);  in amd_isp_dw_i2c_plat_remove()
122 	 * may be accessed during suspend and resume of other devices via I2C  in amd_isp_dw_i2c_plat_prepare()
133 	if (i_dev->shared_with_punit)  in amd_isp_dw_i2c_plat_runtime_suspend()
148 		return -ENODEV;  in amd_isp_dw_i2c_plat_suspend()
152 		i2c_mark_adapter_suspended(&i_dev->adapter);  in amd_isp_dw_i2c_plat_suspend()
162 		return -ENODEV;  in amd_isp_dw_i2c_plat_runtime_resume()
164 	if (!i_dev->shared_with_punit)  in amd_isp_dw_i2c_plat_runtime_resume()
166 	if (i_dev->init)  in amd_isp_dw_i2c_plat_runtime_resume()
167 		i_dev->init(i_dev);  in amd_isp_dw_i2c_plat_runtime_resume()
177 	i2c_mark_adapter_resumed(&i_dev->adapter);  in amd_isp_dw_i2c_plat_resume()
201 MODULE_DESCRIPTION("Synopsys DesignWare I2C bus adapter in AMD ISP");