Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 1 | /* |
| 2 | * AD5504, AD5501 High Voltage Digital to Analog Converter |
| 3 | * |
| 4 | * Copyright 2011 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/interrupt.h> |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 10 | #include <linux/fs.h> |
| 11 | #include <linux/device.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/spi/spi.h> |
| 14 | #include <linux/slab.h> |
| 15 | #include <linux/sysfs.h> |
| 16 | #include <linux/regulator/consumer.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 17 | #include <linux/module.h> |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 18 | |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 19 | #include <linux/iio/iio.h> |
| 20 | #include <linux/iio/sysfs.h> |
| 21 | #include <linux/iio/events.h> |
Lars-Peter Clausen | cadb695 | 2012-06-04 11:36:19 +0200 | [diff] [blame^] | 22 | |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 23 | #include "ad5504.h" |
| 24 | |
| 25 | static int ad5504_spi_write(struct spi_device *spi, u8 addr, u16 val) |
| 26 | { |
| 27 | u16 tmp = cpu_to_be16(AD5504_CMD_WRITE | |
| 28 | AD5504_ADDR(addr) | |
| 29 | (val & AD5504_RES_MASK)); |
| 30 | |
| 31 | return spi_write(spi, (u8 *)&tmp, 2); |
| 32 | } |
| 33 | |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 34 | static int ad5504_spi_read(struct spi_device *spi, u8 addr) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 35 | { |
| 36 | u16 tmp = cpu_to_be16(AD5504_CMD_READ | AD5504_ADDR(addr)); |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 37 | u16 val; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 38 | int ret; |
| 39 | struct spi_transfer t = { |
| 40 | .tx_buf = &tmp, |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 41 | .rx_buf = &val, |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 42 | .len = 2, |
| 43 | }; |
| 44 | struct spi_message m; |
| 45 | |
| 46 | spi_message_init(&m); |
| 47 | spi_message_add_tail(&t, &m); |
| 48 | ret = spi_sync(spi, &m); |
| 49 | |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 50 | if (ret < 0) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 51 | return ret; |
| 52 | |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 53 | return be16_to_cpu(val) & AD5504_RES_MASK; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 54 | } |
| 55 | |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 56 | static int ad5504_read_raw(struct iio_dev *indio_dev, |
| 57 | struct iio_chan_spec const *chan, |
| 58 | int *val, |
| 59 | int *val2, |
| 60 | long m) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 61 | { |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 62 | struct ad5504_state *st = iio_priv(indio_dev); |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 63 | unsigned long scale_uv; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 64 | int ret; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 65 | |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 66 | switch (m) { |
Jonathan Cameron | 09f4eb4 | 2012-04-15 17:41:19 +0100 | [diff] [blame] | 67 | case IIO_CHAN_INFO_RAW: |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 68 | ret = ad5504_spi_read(st->spi, chan->address); |
| 69 | if (ret < 0) |
| 70 | return ret; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 71 | |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 72 | *val = ret; |
| 73 | |
| 74 | return IIO_VAL_INT; |
| 75 | case IIO_CHAN_INFO_SCALE: |
| 76 | scale_uv = (st->vref_mv * 1000) >> chan->scan_type.realbits; |
| 77 | *val = scale_uv / 1000; |
| 78 | *val2 = (scale_uv % 1000) * 1000; |
| 79 | return IIO_VAL_INT_PLUS_MICRO; |
| 80 | |
| 81 | } |
| 82 | return -EINVAL; |
| 83 | } |
| 84 | |
| 85 | static int ad5504_write_raw(struct iio_dev *indio_dev, |
| 86 | struct iio_chan_spec const *chan, |
| 87 | int val, |
| 88 | int val2, |
| 89 | long mask) |
| 90 | { |
| 91 | struct ad5504_state *st = iio_priv(indio_dev); |
| 92 | int ret; |
| 93 | |
| 94 | switch (mask) { |
Jonathan Cameron | 09f4eb4 | 2012-04-15 17:41:19 +0100 | [diff] [blame] | 95 | case IIO_CHAN_INFO_RAW: |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 96 | if (val >= (1 << chan->scan_type.realbits) || val < 0) |
| 97 | return -EINVAL; |
| 98 | |
| 99 | return ad5504_spi_write(st->spi, chan->address, val); |
| 100 | default: |
| 101 | ret = -EINVAL; |
| 102 | } |
| 103 | |
| 104 | return -EINVAL; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 105 | } |
| 106 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 107 | static const char * const ad5504_powerdown_modes[] = { |
| 108 | "20kohm_to_gnd", |
| 109 | "three_state", |
| 110 | }; |
| 111 | |
| 112 | static int ad5504_get_powerdown_mode(struct iio_dev *indio_dev, |
| 113 | const struct iio_chan_spec *chan) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 114 | { |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 115 | struct ad5504_state *st = iio_priv(indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 116 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 117 | return st->pwr_down_mode; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 118 | } |
| 119 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 120 | static int ad5504_set_powerdown_mode(struct iio_dev *indio_dev, |
| 121 | const struct iio_chan_spec *chan, unsigned int mode) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 122 | { |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 123 | struct ad5504_state *st = iio_priv(indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 124 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 125 | st->pwr_down_mode = mode; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 126 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 127 | return 0; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 128 | } |
| 129 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 130 | static const struct iio_enum ad5504_powerdown_mode_enum = { |
| 131 | .items = ad5504_powerdown_modes, |
| 132 | .num_items = ARRAY_SIZE(ad5504_powerdown_modes), |
| 133 | .get = ad5504_get_powerdown_mode, |
| 134 | .set = ad5504_set_powerdown_mode, |
| 135 | }; |
| 136 | |
| 137 | static ssize_t ad5504_read_dac_powerdown(struct iio_dev *indio_dev, |
| 138 | uintptr_t private, const struct iio_chan_spec *chan, char *buf) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 139 | { |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 140 | struct ad5504_state *st = iio_priv(indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 141 | |
| 142 | return sprintf(buf, "%d\n", |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 143 | !(st->pwr_down_mask & (1 << chan->channel))); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 144 | } |
| 145 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 146 | static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev, |
| 147 | uintptr_t private, const struct iio_chan_spec *chan, const char *buf, |
| 148 | size_t len) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 149 | { |
| 150 | long readin; |
| 151 | int ret; |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 152 | struct ad5504_state *st = iio_priv(indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 153 | |
| 154 | ret = strict_strtol(buf, 10, &readin); |
| 155 | if (ret) |
| 156 | return ret; |
| 157 | |
| 158 | if (readin == 0) |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 159 | st->pwr_down_mask |= (1 << chan->channel); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 160 | else if (readin == 1) |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 161 | st->pwr_down_mask &= ~(1 << chan->channel); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 162 | else |
| 163 | ret = -EINVAL; |
| 164 | |
| 165 | ret = ad5504_spi_write(st->spi, AD5504_ADDR_CTRL, |
| 166 | AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) | |
| 167 | AD5504_DAC_PWR(st->pwr_down_mask)); |
| 168 | |
| 169 | /* writes to the CTRL register must be followed by a NOOP */ |
| 170 | ad5504_spi_write(st->spi, AD5504_ADDR_NOOP, 0); |
| 171 | |
| 172 | return ret ? ret : len; |
| 173 | } |
| 174 | |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 175 | static IIO_CONST_ATTR(temp0_thresh_rising_value, "110000"); |
| 176 | static IIO_CONST_ATTR(temp0_thresh_rising_en, "1"); |
| 177 | |
| 178 | static struct attribute *ad5504_ev_attributes[] = { |
| 179 | &iio_const_attr_temp0_thresh_rising_value.dev_attr.attr, |
| 180 | &iio_const_attr_temp0_thresh_rising_en.dev_attr.attr, |
| 181 | NULL, |
| 182 | }; |
| 183 | |
| 184 | static struct attribute_group ad5504_ev_attribute_group = { |
| 185 | .attrs = ad5504_ev_attributes, |
Jonathan Cameron | 8e7d967 | 2011-08-30 12:32:45 +0100 | [diff] [blame] | 186 | .name = "events", |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 187 | }; |
| 188 | |
Jonathan Cameron | ce298d4 | 2011-05-18 14:41:04 +0100 | [diff] [blame] | 189 | static irqreturn_t ad5504_event_handler(int irq, void *private) |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 190 | { |
Jonathan Cameron | 5aa9618 | 2011-08-30 12:41:06 +0100 | [diff] [blame] | 191 | iio_push_event(private, |
Jonathan Cameron | c4b14d9 | 2011-08-12 17:56:04 +0100 | [diff] [blame] | 192 | IIO_UNMOD_EVENT_CODE(IIO_TEMP, |
Jonathan Cameron | ce298d4 | 2011-05-18 14:41:04 +0100 | [diff] [blame] | 193 | 0, |
| 194 | IIO_EV_TYPE_THRESH, |
| 195 | IIO_EV_DIR_RISING), |
| 196 | iio_get_time_ns()); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 197 | |
Jonathan Cameron | ce298d4 | 2011-05-18 14:41:04 +0100 | [diff] [blame] | 198 | return IRQ_HANDLED; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 199 | } |
| 200 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 201 | static const struct iio_info ad5504_info = { |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 202 | .write_raw = ad5504_write_raw, |
| 203 | .read_raw = ad5504_read_raw, |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 204 | .event_attrs = &ad5504_ev_attribute_group, |
| 205 | .driver_module = THIS_MODULE, |
| 206 | }; |
| 207 | |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 208 | static const struct iio_chan_spec_ext_info ad5504_ext_info[] = { |
| 209 | { |
| 210 | .name = "powerdown", |
| 211 | .read = ad5504_read_dac_powerdown, |
| 212 | .write = ad5504_write_dac_powerdown, |
| 213 | }, |
| 214 | IIO_ENUM("powerdown_mode", true, &ad5504_powerdown_mode_enum), |
| 215 | IIO_ENUM_AVAILABLE("powerdown_mode", &ad5504_powerdown_mode_enum), |
| 216 | { }, |
| 217 | }; |
| 218 | |
| 219 | #define AD5504_CHANNEL(_chan) { \ |
| 220 | .type = IIO_VOLTAGE, \ |
| 221 | .indexed = 1, \ |
| 222 | .output = 1, \ |
| 223 | .channel = (_chan), \ |
| 224 | .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ |
| 225 | IIO_CHAN_INFO_SCALE_SHARED_BIT, \ |
| 226 | .address = AD5504_ADDR_DAC(_chan), \ |
| 227 | .scan_type = IIO_ST('u', 12, 16, 0), \ |
| 228 | .ext_info = ad5504_ext_info, \ |
| 229 | } |
| 230 | |
| 231 | static const struct iio_chan_spec ad5504_channels[] = { |
| 232 | AD5504_CHANNEL(0), |
| 233 | AD5504_CHANNEL(1), |
| 234 | AD5504_CHANNEL(2), |
| 235 | AD5504_CHANNEL(3), |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 236 | }; |
| 237 | |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 238 | static int __devinit ad5504_probe(struct spi_device *spi) |
| 239 | { |
| 240 | struct ad5504_platform_data *pdata = spi->dev.platform_data; |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 241 | struct iio_dev *indio_dev; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 242 | struct ad5504_state *st; |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 243 | struct regulator *reg; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 244 | int ret, voltage_uv = 0; |
| 245 | |
Lars-Peter Clausen | 7cbb753 | 2012-04-26 13:35:01 +0200 | [diff] [blame] | 246 | indio_dev = iio_device_alloc(sizeof(*st)); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 247 | if (indio_dev == NULL) { |
| 248 | ret = -ENOMEM; |
| 249 | goto error_ret; |
| 250 | } |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 251 | reg = regulator_get(&spi->dev, "vcc"); |
| 252 | if (!IS_ERR(reg)) { |
| 253 | ret = regulator_enable(reg); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 254 | if (ret) |
| 255 | goto error_put_reg; |
| 256 | |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 257 | voltage_uv = regulator_get_voltage(reg); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 258 | } |
| 259 | |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 260 | spi_set_drvdata(spi, indio_dev); |
| 261 | st = iio_priv(indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 262 | if (voltage_uv) |
| 263 | st->vref_mv = voltage_uv / 1000; |
| 264 | else if (pdata) |
| 265 | st->vref_mv = pdata->vref_mv; |
| 266 | else |
| 267 | dev_warn(&spi->dev, "reference voltage unspecified\n"); |
| 268 | |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 269 | st->reg = reg; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 270 | st->spi = spi; |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 271 | indio_dev->dev.parent = &spi->dev; |
| 272 | indio_dev->name = spi_get_device_id(st->spi)->name; |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 273 | indio_dev->info = &ad5504_info; |
| 274 | if (spi_get_device_id(st->spi)->driver_data == ID_AD5501) |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 275 | indio_dev->num_channels = 1; |
Lars-Peter Clausen | 8d05d77 | 2012-06-04 11:36:15 +0200 | [diff] [blame] | 276 | else |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 277 | indio_dev->num_channels = 4; |
Lars-Peter Clausen | a7b1528 | 2011-11-15 16:31:23 +0100 | [diff] [blame] | 278 | indio_dev->channels = ad5504_channels; |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 279 | indio_dev->modes = INDIO_DIRECT_MODE; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 280 | |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 281 | if (spi->irq) { |
Jonathan Cameron | ce298d4 | 2011-05-18 14:41:04 +0100 | [diff] [blame] | 282 | ret = request_threaded_irq(spi->irq, |
| 283 | NULL, |
| 284 | &ad5504_event_handler, |
| 285 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 286 | spi_get_device_id(st->spi)->name, |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 287 | indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 288 | if (ret) |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 289 | goto error_disable_reg; |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 290 | } |
| 291 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 292 | ret = iio_device_register(indio_dev); |
| 293 | if (ret) |
| 294 | goto error_free_irq; |
| 295 | |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 296 | return 0; |
| 297 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 298 | error_free_irq: |
| 299 | free_irq(spi->irq, indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 300 | error_disable_reg: |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 301 | if (!IS_ERR(reg)) |
Jonathan Cameron | 0cbb2b5 | 2011-08-12 16:55:33 +0100 | [diff] [blame] | 302 | regulator_disable(reg); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 303 | error_put_reg: |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 304 | if (!IS_ERR(reg)) |
| 305 | regulator_put(reg); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 306 | |
Lars-Peter Clausen | 7cbb753 | 2012-04-26 13:35:01 +0200 | [diff] [blame] | 307 | iio_device_free(indio_dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 308 | error_ret: |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 309 | return ret; |
| 310 | } |
| 311 | |
| 312 | static int __devexit ad5504_remove(struct spi_device *spi) |
| 313 | { |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 314 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
| 315 | struct ad5504_state *st = iio_priv(indio_dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 316 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 317 | iio_device_unregister(indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 318 | if (spi->irq) |
Jonathan Cameron | a3684de | 2011-06-27 13:07:32 +0100 | [diff] [blame] | 319 | free_irq(spi->irq, indio_dev); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 320 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 321 | if (!IS_ERR(st->reg)) { |
| 322 | regulator_disable(st->reg); |
| 323 | regulator_put(st->reg); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 324 | } |
Lars-Peter Clausen | 7cbb753 | 2012-04-26 13:35:01 +0200 | [diff] [blame] | 325 | iio_device_free(indio_dev); |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 326 | |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 327 | return 0; |
| 328 | } |
| 329 | |
| 330 | static const struct spi_device_id ad5504_id[] = { |
| 331 | {"ad5504", ID_AD5504}, |
| 332 | {"ad5501", ID_AD5501}, |
| 333 | {} |
| 334 | }; |
Lars-Peter Clausen | 55e4390 | 2011-11-16 08:53:31 +0100 | [diff] [blame] | 335 | MODULE_DEVICE_TABLE(spi, ad5504_id); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 336 | |
| 337 | static struct spi_driver ad5504_driver = { |
| 338 | .driver = { |
| 339 | .name = "ad5504", |
| 340 | .owner = THIS_MODULE, |
| 341 | }, |
| 342 | .probe = ad5504_probe, |
| 343 | .remove = __devexit_p(ad5504_remove), |
| 344 | .id_table = ad5504_id, |
| 345 | }; |
Lars-Peter Clausen | ae6ae6f | 2011-11-16 10:13:39 +0100 | [diff] [blame] | 346 | module_spi_driver(ad5504_driver); |
Michael Hennerich | 59c23ea | 2011-04-04 15:39:15 +0200 | [diff] [blame] | 347 | |
| 348 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); |
| 349 | MODULE_DESCRIPTION("Analog Devices AD5501/AD5501 DAC"); |
| 350 | MODULE_LICENSE("GPL v2"); |