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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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staging:iio:dac:ad5791: allocate chip state with iio_dev and use iio_priv for access.
Slightly fiddly case with two regulators - could reorder, but this is the approach with smallest likely impact. Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Jonathan Cameron
Greg Kroah-Hartman
parent
86729fc46f
commit
f5730d52ba
@ -76,7 +76,7 @@ static ssize_t ad5791_write_dac(struct device *dev,
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const char *buf, size_t len)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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long readin;
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int ret;
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@ -98,7 +98,7 @@ static ssize_t ad5791_read_dac(struct device *dev,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
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int ret;
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int val;
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@ -118,7 +118,7 @@ static ssize_t ad5791_read_powerdown_mode(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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const char mode[][14] = {"6kohm_to_gnd", "three_state"};
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@ -130,7 +130,7 @@ static ssize_t ad5791_write_powerdown_mode(struct device *dev,
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const char *buf, size_t len)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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int ret;
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if (sysfs_streq(buf, "6kohm_to_gnd"))
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@ -148,7 +148,7 @@ static ssize_t ad5791_read_dac_powerdown(struct device *dev,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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return sprintf(buf, "%d\n", st->pwr_down);
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}
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@ -160,7 +160,7 @@ static ssize_t ad5791_write_dac_powerdown(struct device *dev,
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long readin;
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int ret;
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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ret = strict_strtol(buf, 10, &readin);
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if (ret)
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@ -188,7 +188,7 @@ static ssize_t ad5791_show_scale(struct device *dev,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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/* Corresponds to Vref / 2^(bits) */
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unsigned int scale_uv = (st->vref_mv * 1000) >> st->chip_info->bits;
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@ -201,7 +201,7 @@ static ssize_t ad5791_show_name(struct device *dev,
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char *buf)
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{
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struct iio_dev *indio_dev = dev_get_drvdata(dev);
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struct ad5791_state *st = iio_dev_get_devdata(indio_dev);
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struct ad5791_state *st = iio_priv(indio_dev);
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return sprintf(buf, "%s\n", spi_get_device_id(st->spi)->name);
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}
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@ -295,36 +295,39 @@ static const struct iio_info ad5791_info = {
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static int __devinit ad5791_probe(struct spi_device *spi)
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{
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struct ad5791_platform_data *pdata = spi->dev.platform_data;
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struct iio_dev *indio_dev;
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struct regulator *reg_vdd, *reg_vss;
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struct ad5791_state *st;
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int ret, pos_voltage_uv = 0, neg_voltage_uv = 0;
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st = kzalloc(sizeof(*st), GFP_KERNEL);
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if (st == NULL) {
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ret = -ENOMEM;
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goto error_ret;
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}
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spi_set_drvdata(spi, st);
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st->reg_vdd = regulator_get(&spi->dev, "vdd");
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if (!IS_ERR(st->reg_vdd)) {
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ret = regulator_enable(st->reg_vdd);
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reg_vdd = regulator_get(&spi->dev, "vdd");
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if (!IS_ERR(reg_vdd)) {
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ret = regulator_enable(reg_vdd);
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if (ret)
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goto error_put_reg_pos;
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pos_voltage_uv = regulator_get_voltage(st->reg_vdd);
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pos_voltage_uv = regulator_get_voltage(reg_vdd);
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}
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st->reg_vss = regulator_get(&spi->dev, "vss");
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if (!IS_ERR(st->reg_vss)) {
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ret = regulator_enable(st->reg_vss);
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reg_vss = regulator_get(&spi->dev, "vss");
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if (!IS_ERR(reg_vss)) {
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ret = regulator_enable(reg_vss);
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if (ret)
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goto error_put_reg_neg;
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neg_voltage_uv = regulator_get_voltage(st->reg_vss);
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neg_voltage_uv = regulator_get_voltage(reg_vss);
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}
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if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd))
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indio_dev = iio_allocate_device(sizeof(*st));
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if (indio_dev == NULL) {
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ret = -ENOMEM;
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goto error_disable_reg_neg;
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}
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st = iio_priv(indio_dev);
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st->pwr_down = true;
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st->spi = spi;
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if (!IS_ERR(reg_vss) && !IS_ERR(reg_vdd))
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st->vref_mv = (pos_voltage_uv - neg_voltage_uv) / 1000;
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else if (pdata)
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st->vref_mv = pdata->vref_pos_mv - pdata->vref_neg_mv;
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@ -333,7 +336,7 @@ static int __devinit ad5791_probe(struct spi_device *spi)
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ret = ad5791_spi_write(spi, AD5791_ADDR_SW_CTRL, AD5791_SWCTRL_RESET);
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if (ret)
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goto error_disable_reg_neg;
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goto error_free_dev;
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st->chip_info =
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&ad5791_chip_info_tbl[spi_get_device_id(spi)->driver_data];
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@ -346,66 +349,61 @@ static int __devinit ad5791_probe(struct spi_device *spi)
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ret = ad5791_spi_write(spi, AD5791_ADDR_CTRL, st->ctrl |
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AD5791_CTRL_OPGND | AD5791_CTRL_DACTRI);
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if (ret)
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goto error_disable_reg_neg;
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goto error_free_dev;
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st->pwr_down = true;
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st->reg_vdd = reg_vdd;
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st->reg_vss = reg_vss;
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st->spi = spi;
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st->indio_dev = iio_allocate_device(0);
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if (st->indio_dev == NULL) {
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ret = -ENOMEM;
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goto error_disable_reg_neg;
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}
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st->indio_dev->dev.parent = &spi->dev;
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st->indio_dev->dev_data = (void *)(st);
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st->indio_dev->info = &ad5791_info;
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st->indio_dev->modes = INDIO_DIRECT_MODE;
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spi_set_drvdata(spi, indio_dev);
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indio_dev->dev.parent = &spi->dev;
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indio_dev->info = &ad5791_info;
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indio_dev->modes = INDIO_DIRECT_MODE;
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ret = iio_device_register(st->indio_dev);
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ret = iio_device_register(indio_dev);
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if (ret)
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goto error_free_dev;
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return 0;
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error_free_dev:
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iio_free_device(st->indio_dev);
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iio_free_device(indio_dev);
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error_disable_reg_neg:
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if (!IS_ERR(st->reg_vss))
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regulator_disable(st->reg_vss);
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if (!IS_ERR(reg_vss))
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regulator_disable(reg_vss);
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error_put_reg_neg:
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if (!IS_ERR(st->reg_vss))
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regulator_put(st->reg_vss);
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if (!IS_ERR(reg_vss))
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regulator_put(reg_vss);
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if (!IS_ERR(st->reg_vdd))
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regulator_disable(st->reg_vdd);
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if (!IS_ERR(reg_vdd))
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regulator_disable(reg_vdd);
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error_put_reg_pos:
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if (!IS_ERR(st->reg_vdd))
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regulator_put(st->reg_vdd);
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if (!IS_ERR(reg_vdd))
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regulator_put(reg_vdd);
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kfree(st);
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error_ret:
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return ret;
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}
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static int __devexit ad5791_remove(struct spi_device *spi)
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{
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struct ad5791_state *st = spi_get_drvdata(spi);
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struct iio_dev *indio_dev = spi_get_drvdata(spi);
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struct ad5791_state *st = iio_priv(indio_dev);
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struct regulator *reg_vdd = st->reg_vdd;
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struct regulator *reg_vss = st->reg_vss;
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iio_device_unregister(st->indio_dev);
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iio_device_unregister(indio_dev);
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if (!IS_ERR(st->reg_vdd)) {
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regulator_disable(st->reg_vdd);
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regulator_put(st->reg_vdd);
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regulator_disable(reg_vdd);
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regulator_put(reg_vdd);
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}
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if (!IS_ERR(st->reg_vss)) {
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regulator_disable(st->reg_vss);
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regulator_put(st->reg_vss);
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regulator_disable(reg_vss);
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regulator_put(reg_vss);
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}
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kfree(st);
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return 0;
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}
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@ -81,7 +81,6 @@ struct ad5791_chip_info {
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/**
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* struct ad5791_state - driver instance specific data
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* @indio_dev: the industrial I/O device
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* @us: spi_device
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* @reg_vdd: positive supply regulator
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* @reg_vss: negative supply regulator
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@ -91,7 +90,6 @@ struct ad5791_chip_info {
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*/
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struct ad5791_state {
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struct iio_dev *indio_dev;
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struct spi_device *spi;
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struct regulator *reg_vdd;
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struct regulator *reg_vss;
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