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![Alexandru Ardelean](/assets/img/avatar_default.png)
This patch applies the semantic patch: @@ expression I, P, SP; @@ I = devm_iio_device_alloc(P, SP); ... - I->dev.parent = P; It updates 302 files and does 307 deletions. This semantic patch also removes some comments like '/* Establish that the iio_dev is a child of the i2c device */' But this is is only done in case where the block is left empty. The patch does not seem to cover all cases. It looks like in some cases a different variable is used in some cases to assign the parent, but it points to the same reference. In other cases, the block covered by ... may be just too big to be covered by the semantic patch. However, this looks pretty good as well, as it does cover a big bulk of the drivers that should remove the parent assignment. Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
169 lines
3.6 KiB
C
169 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* MEN 16z188 Analog to Digial Converter
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*
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* Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de)
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* Author: Johannes Thumshirn <johannes.thumshirn@men.de>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mcb.h>
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#include <linux/io.h>
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#include <linux/iio/iio.h>
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#define Z188_ADC_MAX_CHAN 8
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#define Z188_ADC_GAIN 0x0700000
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#define Z188_MODE_VOLTAGE BIT(27)
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#define Z188_CFG_AUTO 0x1
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#define Z188_CTRL_REG 0x40
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#define ADC_DATA(x) (((x) >> 2) & 0x7ffffc)
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#define ADC_OVR(x) ((x) & 0x1)
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struct z188_adc {
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struct resource *mem;
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void __iomem *base;
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};
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#define Z188_ADC_CHANNEL(idx) { \
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.type = IIO_VOLTAGE, \
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.indexed = 1, \
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.channel = (idx), \
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
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}
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static const struct iio_chan_spec z188_adc_iio_channels[] = {
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Z188_ADC_CHANNEL(0),
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Z188_ADC_CHANNEL(1),
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Z188_ADC_CHANNEL(2),
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Z188_ADC_CHANNEL(3),
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Z188_ADC_CHANNEL(4),
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Z188_ADC_CHANNEL(5),
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Z188_ADC_CHANNEL(6),
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Z188_ADC_CHANNEL(7),
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};
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static int z188_iio_read_raw(struct iio_dev *iio_dev,
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struct iio_chan_spec const *chan,
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int *val,
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int *val2,
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long info)
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{
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struct z188_adc *adc = iio_priv(iio_dev);
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int ret;
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u16 tmp;
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switch (info) {
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case IIO_CHAN_INFO_RAW:
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tmp = readw(adc->base + chan->channel * 4);
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if (ADC_OVR(tmp)) {
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dev_info(&iio_dev->dev,
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"Oversampling error on ADC channel %d\n",
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chan->channel);
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return -EIO;
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}
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*val = ADC_DATA(tmp);
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ret = IIO_VAL_INT;
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break;
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default:
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ret = -EINVAL;
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break;
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}
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return ret;
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}
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static const struct iio_info z188_adc_info = {
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.read_raw = &z188_iio_read_raw,
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};
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static void men_z188_config_channels(void __iomem *addr)
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{
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int i;
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u32 cfg;
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u32 ctl;
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ctl = readl(addr + Z188_CTRL_REG);
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ctl |= Z188_CFG_AUTO;
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writel(ctl, addr + Z188_CTRL_REG);
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for (i = 0; i < Z188_ADC_MAX_CHAN; i++) {
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cfg = readl(addr + i);
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cfg &= ~Z188_ADC_GAIN;
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cfg |= Z188_MODE_VOLTAGE;
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writel(cfg, addr + i);
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}
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}
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static int men_z188_probe(struct mcb_device *dev,
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const struct mcb_device_id *id)
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{
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struct z188_adc *adc;
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struct iio_dev *indio_dev;
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struct resource *mem;
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indio_dev = devm_iio_device_alloc(&dev->dev, sizeof(struct z188_adc));
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if (!indio_dev)
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return -ENOMEM;
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adc = iio_priv(indio_dev);
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indio_dev->name = "z188-adc";
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indio_dev->info = &z188_adc_info;
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indio_dev->modes = INDIO_DIRECT_MODE;
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indio_dev->channels = z188_adc_iio_channels;
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indio_dev->num_channels = ARRAY_SIZE(z188_adc_iio_channels);
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mem = mcb_request_mem(dev, "z188-adc");
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if (IS_ERR(mem))
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return PTR_ERR(mem);
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adc->base = ioremap(mem->start, resource_size(mem));
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if (adc->base == NULL)
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goto err;
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men_z188_config_channels(adc->base);
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adc->mem = mem;
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mcb_set_drvdata(dev, indio_dev);
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return iio_device_register(indio_dev);
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err:
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mcb_release_mem(mem);
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return -ENXIO;
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}
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static void men_z188_remove(struct mcb_device *dev)
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{
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struct iio_dev *indio_dev = mcb_get_drvdata(dev);
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struct z188_adc *adc = iio_priv(indio_dev);
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iio_device_unregister(indio_dev);
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iounmap(adc->base);
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mcb_release_mem(adc->mem);
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}
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static const struct mcb_device_id men_z188_ids[] = {
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{ .device = 0xbc },
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{ }
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};
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MODULE_DEVICE_TABLE(mcb, men_z188_ids);
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static struct mcb_driver men_z188_driver = {
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.driver = {
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.name = "z188-adc",
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.owner = THIS_MODULE,
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},
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.probe = men_z188_probe,
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.remove = men_z188_remove,
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.id_table = men_z188_ids,
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};
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module_mcb_driver(men_z188_driver);
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MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("IIO ADC driver for MEN 16z188 ADC Core");
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MODULE_ALIAS("mcb:16z188");
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MODULE_IMPORT_NS(MCB);
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