1 // SPDX-License-Identifier: GPL-2.0-only
2 /* ADC MFD core driver for sunxi platforms
7 #include <linux/interrupt.h>
8 #include <linux/kernel.h>
9 #include <linux/mfd/core.h>
10 #include <linux/module.h>
11 #include <linux/of_device.h>
12 #include <linux/of_irq.h>
13 #include <linux/regmap.h>
15 #include <linux/mfd/sun4i-gpadc.h>
17 #define ARCH_SUN4I_A10 0
18 #define ARCH_SUN5I_A13 1
19 #define ARCH_SUN6I_A31 2
21 static const struct resource adc_resources[] = {
22 DEFINE_RES_IRQ_NAMED(SUN4I_GPADC_IRQ_FIFO_DATA, "FIFO_DATA_PENDING"),
23 DEFINE_RES_IRQ_NAMED(SUN4I_GPADC_IRQ_TEMP_DATA, "TEMP_DATA_PENDING"),
26 static const struct regmap_irq sun4i_gpadc_regmap_irq[] = {
27 REGMAP_IRQ_REG(SUN4I_GPADC_IRQ_FIFO_DATA, 0,
28 SUN4I_GPADC_INT_FIFOC_TP_DATA_IRQ_EN),
29 REGMAP_IRQ_REG(SUN4I_GPADC_IRQ_TEMP_DATA, 0,
30 SUN4I_GPADC_INT_FIFOC_TEMP_IRQ_EN),
33 static const struct regmap_irq_chip sun4i_gpadc_regmap_irq_chip = {
34 .name = "sun4i_gpadc_irq_chip",
35 .status_base = SUN4I_GPADC_INT_FIFOS,
36 .ack_base = SUN4I_GPADC_INT_FIFOS,
37 .unmask_base = SUN4I_GPADC_INT_FIFOC,
38 .init_ack_masked = true,
39 .irqs = sun4i_gpadc_regmap_irq,
40 .num_irqs = ARRAY_SIZE(sun4i_gpadc_regmap_irq),
44 static struct mfd_cell sun4i_gpadc_cells[] = {
46 .name = "sun4i-a10-gpadc-iio",
47 .resources = adc_resources,
48 .num_resources = ARRAY_SIZE(adc_resources),
50 { .name = "iio_hwmon" }
53 static struct mfd_cell sun5i_gpadc_cells[] = {
55 .name = "sun5i-a13-gpadc-iio",
56 .resources = adc_resources,
57 .num_resources = ARRAY_SIZE(adc_resources),
59 { .name = "iio_hwmon" },
62 static struct mfd_cell sun6i_gpadc_cells[] = {
64 .name = "sun6i-a31-gpadc-iio",
65 .resources = adc_resources,
66 .num_resources = ARRAY_SIZE(adc_resources),
68 { .name = "iio_hwmon" },
71 static const struct regmap_config sun4i_gpadc_regmap_config = {
78 static const struct of_device_id sun4i_gpadc_of_match[] = {
80 .compatible = "allwinner,sun4i-a10-ts",
81 .data = (void *)ARCH_SUN4I_A10,
83 .compatible = "allwinner,sun5i-a13-ts",
84 .data = (void *)ARCH_SUN5I_A13,
86 .compatible = "allwinner,sun6i-a31-ts",
87 .data = (void *)ARCH_SUN6I_A31,
91 MODULE_DEVICE_TABLE(of, sun4i_gpadc_of_match);
93 static int sun4i_gpadc_probe(struct platform_device *pdev)
95 struct sun4i_gpadc_dev *dev;
96 const struct of_device_id *of_id;
97 const struct mfd_cell *cells;
98 unsigned int irq, size;
101 of_id = of_match_node(sun4i_gpadc_of_match, pdev->dev.of_node);
105 switch ((long)of_id->data) {
107 cells = sun4i_gpadc_cells;
108 size = ARRAY_SIZE(sun4i_gpadc_cells);
111 cells = sun5i_gpadc_cells;
112 size = ARRAY_SIZE(sun5i_gpadc_cells);
115 cells = sun6i_gpadc_cells;
116 size = ARRAY_SIZE(sun6i_gpadc_cells);
122 dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
126 dev->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
127 if (IS_ERR(dev->base))
128 return PTR_ERR(dev->base);
130 dev->dev = &pdev->dev;
131 dev_set_drvdata(dev->dev, dev);
133 dev->regmap = devm_regmap_init_mmio(dev->dev, dev->base,
134 &sun4i_gpadc_regmap_config);
135 if (IS_ERR(dev->regmap)) {
136 ret = PTR_ERR(dev->regmap);
137 dev_err(&pdev->dev, "failed to init regmap: %d\n", ret);
141 /* Disable all interrupts */
142 regmap_write(dev->regmap, SUN4I_GPADC_INT_FIFOC, 0);
144 irq = platform_get_irq(pdev, 0);
145 ret = devm_regmap_add_irq_chip(&pdev->dev, dev->regmap, irq,
147 &sun4i_gpadc_regmap_irq_chip,
150 dev_err(&pdev->dev, "failed to add irq chip: %d\n", ret);
154 ret = devm_mfd_add_devices(dev->dev, 0, cells, size, NULL, 0, NULL);
156 dev_err(&pdev->dev, "failed to add MFD devices: %d\n", ret);
163 static struct platform_driver sun4i_gpadc_driver = {
165 .name = "sun4i-gpadc",
166 .of_match_table = sun4i_gpadc_of_match,
168 .probe = sun4i_gpadc_probe,
171 module_platform_driver(sun4i_gpadc_driver);
173 MODULE_DESCRIPTION("Allwinner sunxi platforms' GPADC MFD core driver");
175 MODULE_LICENSE("GPL v2");