drivers/mfd/sun4i-gpadc.c

1 // SPDX-License-Identifier: GPL-2.0-only
4  * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons.com>
15 #include <linux/mfd/sun4i-gpadc.h>
46 		.name	= "sun4i-a10-gpadc-iio",
55 		.name	= "sun5i-a13-gpadc-iio",
64 		.name	= "sun6i-a31-gpadc-iio",
80 		.compatible = "allwinner,sun4i-a10-ts",
83 		.compatible = "allwinner,sun5i-a13-ts",
86 		.compatible = "allwinner,sun6i-a31-ts",
101 	of_id = of_match_node(sun4i_gpadc_of_match, pdev->dev.of_node);  in sun4i_gpadc_probe()
103 		return -EINVAL;  in sun4i_gpadc_probe()
105 	switch ((long)of_id->data) {  in sun4i_gpadc_probe()
119 		return -EINVAL;  in sun4i_gpadc_probe()
122 	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);  in sun4i_gpadc_probe()
124 		return -ENOMEM;  in sun4i_gpadc_probe()
126 	dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);  in sun4i_gpadc_probe()
127 	if (IS_ERR(dev->base))  in sun4i_gpadc_probe()
128 		return PTR_ERR(dev->base);  in sun4i_gpadc_probe()
130 	dev->dev = &pdev->dev;  in sun4i_gpadc_probe()
131 	dev_set_drvdata(dev->dev, dev);  in sun4i_gpadc_probe()
133 	dev->regmap = devm_regmap_init_mmio(dev->dev, dev->base,  in sun4i_gpadc_probe()
135 	if (IS_ERR(dev->regmap)) {  in sun4i_gpadc_probe()
136 		ret = PTR_ERR(dev->regmap);  in sun4i_gpadc_probe()
137 		dev_err(&pdev->dev, "failed to init regmap: %d\n", ret);  in sun4i_gpadc_probe()
142 	regmap_write(dev->regmap, SUN4I_GPADC_INT_FIFOC, 0);  in sun4i_gpadc_probe()
145 	ret = devm_regmap_add_irq_chip(&pdev->dev, dev->regmap, irq,  in sun4i_gpadc_probe()
148 				       &dev->regmap_irqc);  in sun4i_gpadc_probe()
150 		dev_err(&pdev->dev, "failed to add irq chip: %d\n", ret);  in sun4i_gpadc_probe()
154 	ret = devm_mfd_add_devices(dev->dev, 0, cells, size, NULL, 0, NULL);  in sun4i_gpadc_probe()
156 		dev_err(&pdev->dev, "failed to add MFD devices: %d\n", ret);  in sun4i_gpadc_probe()
165 		.name = "sun4i-gpadc",
174 MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");