1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * AD7606 Parallel Interface ADC driver 4 * 5 * Copyright 2011 Analog Devices Inc. 6 */ 7 8 #include <linux/mod_devicetable.h> 9 #include <linux/module.h> 10 #include <linux/platform_device.h> 11 #include <linux/types.h> 12 #include <linux/err.h> 13 #include <linux/io.h> 14 15 #include <linux/iio/iio.h> 16 #include "ad7606.h" 17 18 static int ad7606_par16_read_block(struct device *dev, 19 int count, void *buf) 20 { 21 struct iio_dev *indio_dev = dev_get_drvdata(dev); 22 struct ad7606_state *st = iio_priv(indio_dev); 23 24 insw((unsigned long)st->base_address, buf, count); 25 26 return 0; 27 } 28 29 static const struct ad7606_bus_ops ad7606_par16_bops = { 30 .read_block = ad7606_par16_read_block, 31 }; 32 33 static int ad7606_par8_read_block(struct device *dev, 34 int count, void *buf) 35 { 36 struct iio_dev *indio_dev = dev_get_drvdata(dev); 37 struct ad7606_state *st = iio_priv(indio_dev); 38 39 insb((unsigned long)st->base_address, buf, count * 2); 40 41 return 0; 42 } 43 44 static const struct ad7606_bus_ops ad7606_par8_bops = { 45 .read_block = ad7606_par8_read_block, 46 }; 47 48 static int ad7606_par_probe(struct platform_device *pdev) 49 { 50 const struct platform_device_id *id = platform_get_device_id(pdev); 51 struct resource *res; 52 void __iomem *addr; 53 resource_size_t remap_size; 54 int irq; 55 56 irq = platform_get_irq(pdev, 0); 57 if (irq < 0) 58 return irq; 59 60 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 61 addr = devm_ioremap_resource(&pdev->dev, res); 62 if (IS_ERR(addr)) 63 return PTR_ERR(addr); 64 65 remap_size = resource_size(res); 66 67 return ad7606_probe(&pdev->dev, irq, addr, 68 id->name, id->driver_data, 69 remap_size > 1 ? &ad7606_par16_bops : 70 &ad7606_par8_bops); 71 } 72 73 static const struct platform_device_id ad7606_driver_ids[] = { 74 { .name = "ad7605-4", .driver_data = ID_AD7605_4, }, 75 { .name = "ad7606-4", .driver_data = ID_AD7606_4, }, 76 { .name = "ad7606-6", .driver_data = ID_AD7606_6, }, 77 { .name = "ad7606-8", .driver_data = ID_AD7606_8, }, 78 { } 79 }; 80 MODULE_DEVICE_TABLE(platform, ad7606_driver_ids); 81 82 static const struct of_device_id ad7606_of_match[] = { 83 { .compatible = "adi,ad7605-4" }, 84 { .compatible = "adi,ad7606-4" }, 85 { .compatible = "adi,ad7606-6" }, 86 { .compatible = "adi,ad7606-8" }, 87 { }, 88 }; 89 MODULE_DEVICE_TABLE(of, ad7606_of_match); 90 91 static struct platform_driver ad7606_driver = { 92 .probe = ad7606_par_probe, 93 .id_table = ad7606_driver_ids, 94 .driver = { 95 .name = "ad7606", 96 .pm = AD7606_PM_OPS, 97 .of_match_table = ad7606_of_match, 98 }, 99 }; 100 module_platform_driver(ad7606_driver); 101 102 MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); 103 MODULE_DESCRIPTION("Analog Devices AD7606 ADC"); 104 MODULE_LICENSE("GPL v2"); 105 MODULE_IMPORT_NS(IIO_AD7606); 106