1 // SPDX-License-Identifier: GPL-2.0-only
3  * Samsung EXYNOS4x12 FIMC-IS (Imaging Subsystem) driver
16 #include "fimc-is-i2c.h"
24  * An empty algorithm is used as the actual I2C bus controller driver
25  * is implemented in the FIMC-IS subsystem firmware and the host CPU
39 	struct device_node *node = pdev->dev.of_node;  in fimc_is_i2c_probe()
44 	isp_i2c = devm_kzalloc(&pdev->dev, sizeof(*isp_i2c), GFP_KERNEL);  in fimc_is_i2c_probe()
46 		return -ENOMEM;  in fimc_is_i2c_probe()
48 	isp_i2c->clock = devm_clk_get(&pdev->dev, "i2c_isp");  in fimc_is_i2c_probe()
49 	if (IS_ERR(isp_i2c->clock)) {  in fimc_is_i2c_probe()
50 		dev_err(&pdev->dev, "failed to get the clock\n");  in fimc_is_i2c_probe()
51 		return PTR_ERR(isp_i2c->clock);  in fimc_is_i2c_probe()
54 	i2c_adap = &isp_i2c->adapter;  in fimc_is_i2c_probe()
55 	i2c_adap->dev.of_node = node;  in fimc_is_i2c_probe()
56 	i2c_adap->dev.parent = &pdev->dev;  in fimc_is_i2c_probe()
57 	strscpy(i2c_adap->name, "exynos4x12-isp-i2c", sizeof(i2c_adap->name));  in fimc_is_i2c_probe()
58 	i2c_adap->owner = THIS_MODULE;  in fimc_is_i2c_probe()
59 	i2c_adap->algo = &fimc_is_i2c_algorithm;  in fimc_is_i2c_probe()
62 	pm_runtime_enable(&pdev->dev);  in fimc_is_i2c_probe()
69 	 * is handled by the ISP firmware.  But we rely on the runtime PM  in fimc_is_i2c_probe()
72 	 * used in probe() handler of clients of this adapter so there is  in fimc_is_i2c_probe()
76 	pm_suspend_ignore_children(&i2c_adap->dev, false);  in fimc_is_i2c_probe()
80 	pm_runtime_disable(&pdev->dev);  in fimc_is_i2c_probe()
88 	pm_runtime_disable(&pdev->dev);  in fimc_is_i2c_remove()
89 	i2c_del_adapter(&isp_i2c->adapter);  in fimc_is_i2c_remove()
97 	clk_disable_unprepare(isp_i2c->clock);  in fimc_is_i2c_runtime_suspend()
105 	return clk_prepare_enable(isp_i2c->clock);  in fimc_is_i2c_runtime_resume()
143 		.name		= "fimc-isp-i2c",