^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* ADC MFD core driver for sunxi platforms
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/of_irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/sun4i-gpadc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define ARCH_SUN4I_A10 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define ARCH_SUN5I_A13 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define ARCH_SUN6I_A31 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static struct resource adc_resources[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) DEFINE_RES_IRQ_NAMED(SUN4I_GPADC_IRQ_FIFO_DATA, "FIFO_DATA_PENDING"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) DEFINE_RES_IRQ_NAMED(SUN4I_GPADC_IRQ_TEMP_DATA, "TEMP_DATA_PENDING"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) static const struct regmap_irq sun4i_gpadc_regmap_irq[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) REGMAP_IRQ_REG(SUN4I_GPADC_IRQ_FIFO_DATA, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) SUN4I_GPADC_INT_FIFOC_TP_DATA_IRQ_EN),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) REGMAP_IRQ_REG(SUN4I_GPADC_IRQ_TEMP_DATA, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) SUN4I_GPADC_INT_FIFOC_TEMP_IRQ_EN),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static const struct regmap_irq_chip sun4i_gpadc_regmap_irq_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) .name = "sun4i_gpadc_irq_chip",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) .status_base = SUN4I_GPADC_INT_FIFOS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) .ack_base = SUN4I_GPADC_INT_FIFOS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) .mask_base = SUN4I_GPADC_INT_FIFOC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) .init_ack_masked = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) .mask_invert = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) .irqs = sun4i_gpadc_regmap_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) .num_irqs = ARRAY_SIZE(sun4i_gpadc_regmap_irq),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) .num_regs = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct mfd_cell sun4i_gpadc_cells[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .name = "sun4i-a10-gpadc-iio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .resources = adc_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) .num_resources = ARRAY_SIZE(adc_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) { .name = "iio_hwmon" }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static struct mfd_cell sun5i_gpadc_cells[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) .name = "sun5i-a13-gpadc-iio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) .resources = adc_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) .num_resources = ARRAY_SIZE(adc_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) { .name = "iio_hwmon" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static struct mfd_cell sun6i_gpadc_cells[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) .name = "sun6i-a31-gpadc-iio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) .resources = adc_resources,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .num_resources = ARRAY_SIZE(adc_resources),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) { .name = "iio_hwmon" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static const struct regmap_config sun4i_gpadc_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .reg_bits = 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .val_bits = 32,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .reg_stride = 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) .fast_io = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static const struct of_device_id sun4i_gpadc_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) .compatible = "allwinner,sun4i-a10-ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) .data = (void *)ARCH_SUN4I_A10,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) .compatible = "allwinner,sun5i-a13-ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) .data = (void *)ARCH_SUN5I_A13,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }, {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) .compatible = "allwinner,sun6i-a31-ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) .data = (void *)ARCH_SUN6I_A31,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }, { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) MODULE_DEVICE_TABLE(of, sun4i_gpadc_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int sun4i_gpadc_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) struct sun4i_gpadc_dev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) struct resource *mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) const struct of_device_id *of_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) const struct mfd_cell *cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) unsigned int irq, size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) of_id = of_match_node(sun4i_gpadc_of_match, pdev->dev.of_node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (!of_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) switch ((long)of_id->data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) case ARCH_SUN4I_A10:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) cells = sun4i_gpadc_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) size = ARRAY_SIZE(sun4i_gpadc_cells);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) case ARCH_SUN5I_A13:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) cells = sun5i_gpadc_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) size = ARRAY_SIZE(sun5i_gpadc_cells);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) case ARCH_SUN6I_A31:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) cells = sun6i_gpadc_cells;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) size = ARRAY_SIZE(sun6i_gpadc_cells);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if (!dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) dev->base = devm_ioremap_resource(&pdev->dev, mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (IS_ERR(dev->base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return PTR_ERR(dev->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) dev->dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) dev_set_drvdata(dev->dev, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) dev->regmap = devm_regmap_init_mmio(dev->dev, dev->base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) &sun4i_gpadc_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (IS_ERR(dev->regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ret = PTR_ERR(dev->regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) dev_err(&pdev->dev, "failed to init regmap: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Disable all interrupts */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) regmap_write(dev->regmap, SUN4I_GPADC_INT_FIFOC, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) irq = platform_get_irq(pdev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) ret = devm_regmap_add_irq_chip(&pdev->dev, dev->regmap, irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) IRQF_ONESHOT, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) &sun4i_gpadc_regmap_irq_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) &dev->regmap_irqc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) dev_err(&pdev->dev, "failed to add irq chip: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ret = devm_mfd_add_devices(dev->dev, 0, cells, size, NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) dev_err(&pdev->dev, "failed to add MFD devices: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) static struct platform_driver sun4i_gpadc_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) .name = "sun4i-gpadc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .of_match_table = of_match_ptr(sun4i_gpadc_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) .probe = sun4i_gpadc_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) module_platform_driver(sun4i_gpadc_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) MODULE_DESCRIPTION("Allwinner sunxi platforms' GPADC MFD core driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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