Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 1 | /* |
| 2 | * ADE7759 Active Energy Metering IC with di/dt Sensor Interface Driver |
| 3 | * |
| 4 | * Copyright 2010 Analog Devices Inc. |
| 5 | * |
| 6 | * Licensed under the GPL-2 or later. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/interrupt.h> |
| 10 | #include <linux/irq.h> |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 11 | #include <linux/delay.h> |
| 12 | #include <linux/mutex.h> |
| 13 | #include <linux/device.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/spi/spi.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/sysfs.h> |
| 18 | #include <linux/list.h> |
Paul Gortmaker | 99c9785 | 2011-07-03 15:49:50 -0400 | [diff] [blame] | 19 | #include <linux/module.h> |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 20 | |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 21 | #include <linux/iio/iio.h> |
| 22 | #include <linux/iio/sysfs.h> |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 23 | #include "meter.h" |
| 24 | #include "ade7759.h" |
| 25 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 26 | static int ade7759_spi_write_reg_8(struct device *dev, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 27 | u8 reg_address, |
| 28 | u8 val) |
| 29 | { |
| 30 | int ret; |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 31 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 32 | struct ade7759_state *st = iio_priv(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 33 | |
| 34 | mutex_lock(&st->buf_lock); |
| 35 | st->tx[0] = ADE7759_WRITE_REG(reg_address); |
| 36 | st->tx[1] = val; |
| 37 | |
| 38 | ret = spi_write(st->us, st->tx, 2); |
| 39 | mutex_unlock(&st->buf_lock); |
| 40 | |
| 41 | return ret; |
| 42 | } |
| 43 | |
| 44 | static int ade7759_spi_write_reg_16(struct device *dev, |
| 45 | u8 reg_address, |
| 46 | u16 value) |
| 47 | { |
| 48 | int ret; |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 49 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 50 | struct ade7759_state *st = iio_priv(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 51 | |
| 52 | mutex_lock(&st->buf_lock); |
| 53 | st->tx[0] = ADE7759_WRITE_REG(reg_address); |
| 54 | st->tx[1] = (value >> 8) & 0xFF; |
| 55 | st->tx[2] = value & 0xFF; |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 56 | ret = spi_write(st->us, st->tx, 3); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 57 | mutex_unlock(&st->buf_lock); |
| 58 | |
| 59 | return ret; |
| 60 | } |
| 61 | |
| 62 | static int ade7759_spi_read_reg_8(struct device *dev, |
| 63 | u8 reg_address, |
| 64 | u8 *val) |
| 65 | { |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 66 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 67 | struct ade7759_state *st = iio_priv(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 68 | int ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 69 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 70 | ret = spi_w8r8(st->us, ADE7759_READ_REG(reg_address)); |
| 71 | if (ret < 0) { |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 72 | dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X", |
| 73 | reg_address); |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 74 | return ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 75 | } |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 76 | *val = ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 77 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 78 | return 0; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static int ade7759_spi_read_reg_16(struct device *dev, |
| 82 | u8 reg_address, |
| 83 | u16 *val) |
| 84 | { |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 85 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 86 | struct ade7759_state *st = iio_priv(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 87 | int ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 88 | |
Lars-Peter Clausen | 2359074 | 2013-09-27 16:34:29 +0200 | [diff] [blame] | 89 | ret = spi_w8r16be(st->us, ADE7759_READ_REG(reg_address)); |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 90 | if (ret < 0) { |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 91 | dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X", |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 92 | reg_address); |
| 93 | return ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 94 | } |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 95 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 96 | *val = ret; |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 97 | |
| 98 | return 0; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static int ade7759_spi_read_reg_40(struct device *dev, |
| 102 | u8 reg_address, |
| 103 | u64 *val) |
| 104 | { |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 105 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 106 | struct ade7759_state *st = iio_priv(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 107 | int ret; |
| 108 | struct spi_transfer xfers[] = { |
| 109 | { |
| 110 | .tx_buf = st->tx, |
| 111 | .rx_buf = st->rx, |
| 112 | .bits_per_word = 8, |
| 113 | .len = 6, |
| 114 | }, |
| 115 | }; |
| 116 | |
| 117 | mutex_lock(&st->buf_lock); |
| 118 | st->tx[0] = ADE7759_READ_REG(reg_address); |
Zachary Warren | 56ae98a | 2014-11-22 22:19:31 +1100 | [diff] [blame] | 119 | memset(&st->tx[1], 0, 5); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 120 | |
Lars-Peter Clausen | ad6c46b | 2013-01-09 17:31:00 +0000 | [diff] [blame] | 121 | ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers)); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 122 | if (ret) { |
| 123 | dev_err(&st->us->dev, "problem when reading 40 bit register 0x%02X", |
| 124 | reg_address); |
| 125 | goto error_ret; |
| 126 | } |
| 127 | *val = ((u64)st->rx[1] << 32) | (st->rx[2] << 24) | |
| 128 | (st->rx[3] << 16) | (st->rx[4] << 8) | st->rx[5]; |
| 129 | |
| 130 | error_ret: |
| 131 | mutex_unlock(&st->buf_lock); |
| 132 | return ret; |
| 133 | } |
| 134 | |
| 135 | static ssize_t ade7759_read_8bit(struct device *dev, |
| 136 | struct device_attribute *attr, |
| 137 | char *buf) |
| 138 | { |
| 139 | int ret; |
| 140 | u8 val = 0; |
| 141 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 142 | |
| 143 | ret = ade7759_spi_read_reg_8(dev, this_attr->address, &val); |
| 144 | if (ret) |
| 145 | return ret; |
| 146 | |
| 147 | return sprintf(buf, "%u\n", val); |
| 148 | } |
| 149 | |
| 150 | static ssize_t ade7759_read_16bit(struct device *dev, |
| 151 | struct device_attribute *attr, |
| 152 | char *buf) |
| 153 | { |
| 154 | int ret; |
| 155 | u16 val = 0; |
| 156 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 157 | |
| 158 | ret = ade7759_spi_read_reg_16(dev, this_attr->address, &val); |
| 159 | if (ret) |
| 160 | return ret; |
| 161 | |
| 162 | return sprintf(buf, "%u\n", val); |
| 163 | } |
| 164 | |
| 165 | static ssize_t ade7759_read_40bit(struct device *dev, |
| 166 | struct device_attribute *attr, |
| 167 | char *buf) |
| 168 | { |
| 169 | int ret; |
| 170 | u64 val = 0; |
| 171 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 172 | |
| 173 | ret = ade7759_spi_read_reg_40(dev, this_attr->address, &val); |
| 174 | if (ret) |
| 175 | return ret; |
| 176 | |
| 177 | return sprintf(buf, "%llu\n", val); |
| 178 | } |
| 179 | |
| 180 | static ssize_t ade7759_write_8bit(struct device *dev, |
| 181 | struct device_attribute *attr, |
| 182 | const char *buf, |
| 183 | size_t len) |
| 184 | { |
| 185 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 186 | int ret; |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 187 | u8 val; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 188 | |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 189 | ret = kstrtou8(buf, 10, &val); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 190 | if (ret) |
| 191 | goto error_ret; |
| 192 | ret = ade7759_spi_write_reg_8(dev, this_attr->address, val); |
| 193 | |
| 194 | error_ret: |
| 195 | return ret ? ret : len; |
| 196 | } |
| 197 | |
| 198 | static ssize_t ade7759_write_16bit(struct device *dev, |
| 199 | struct device_attribute *attr, |
| 200 | const char *buf, |
| 201 | size_t len) |
| 202 | { |
| 203 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 204 | int ret; |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 205 | u16 val; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 206 | |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 207 | ret = kstrtou16(buf, 10, &val); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 208 | if (ret) |
| 209 | goto error_ret; |
| 210 | ret = ade7759_spi_write_reg_16(dev, this_attr->address, val); |
| 211 | |
| 212 | error_ret: |
| 213 | return ret ? ret : len; |
| 214 | } |
| 215 | |
| 216 | static int ade7759_reset(struct device *dev) |
| 217 | { |
| 218 | int ret; |
| 219 | u16 val; |
Darshana Padmadas | b060471 | 2014-09-30 20:22:58 +0530 | [diff] [blame] | 220 | |
Devendra Naga | 1e716a1 | 2015-01-02 04:02:55 -0500 | [diff] [blame] | 221 | ret = ade7759_spi_read_reg_16(dev, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 222 | ADE7759_MODE, |
| 223 | &val); |
Devendra Naga | 1e716a1 | 2015-01-02 04:02:55 -0500 | [diff] [blame] | 224 | if (ret < 0) |
| 225 | return ret; |
| 226 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 227 | val |= 1 << 6; /* Software Chip Reset */ |
Aya Mahfouz | 838ec19 | 2015-02-27 15:08:38 +0200 | [diff] [blame] | 228 | return ade7759_spi_write_reg_16(dev, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 229 | ADE7759_MODE, |
| 230 | val); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 231 | } |
| 232 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 233 | static IIO_DEV_ATTR_AENERGY(ade7759_read_40bit, ADE7759_AENERGY); |
| 234 | static IIO_DEV_ATTR_CFDEN(S_IWUSR | S_IRUGO, |
| 235 | ade7759_read_16bit, |
| 236 | ade7759_write_16bit, |
| 237 | ADE7759_CFDEN); |
| 238 | static IIO_DEV_ATTR_CFNUM(S_IWUSR | S_IRUGO, |
| 239 | ade7759_read_8bit, |
| 240 | ade7759_write_8bit, |
| 241 | ADE7759_CFNUM); |
| 242 | static IIO_DEV_ATTR_CHKSUM(ade7759_read_8bit, ADE7759_CHKSUM); |
| 243 | static IIO_DEV_ATTR_PHCAL(S_IWUSR | S_IRUGO, |
| 244 | ade7759_read_16bit, |
| 245 | ade7759_write_16bit, |
| 246 | ADE7759_PHCAL); |
| 247 | static IIO_DEV_ATTR_APOS(S_IWUSR | S_IRUGO, |
| 248 | ade7759_read_16bit, |
| 249 | ade7759_write_16bit, |
| 250 | ADE7759_APOS); |
| 251 | static IIO_DEV_ATTR_SAGCYC(S_IWUSR | S_IRUGO, |
| 252 | ade7759_read_8bit, |
| 253 | ade7759_write_8bit, |
| 254 | ADE7759_SAGCYC); |
| 255 | static IIO_DEV_ATTR_SAGLVL(S_IWUSR | S_IRUGO, |
| 256 | ade7759_read_8bit, |
| 257 | ade7759_write_8bit, |
| 258 | ADE7759_SAGLVL); |
| 259 | static IIO_DEV_ATTR_LINECYC(S_IWUSR | S_IRUGO, |
| 260 | ade7759_read_8bit, |
| 261 | ade7759_write_8bit, |
| 262 | ADE7759_LINECYC); |
| 263 | static IIO_DEV_ATTR_LENERGY(ade7759_read_40bit, ADE7759_LENERGY); |
| 264 | static IIO_DEV_ATTR_PGA_GAIN(S_IWUSR | S_IRUGO, |
| 265 | ade7759_read_8bit, |
| 266 | ade7759_write_8bit, |
| 267 | ADE7759_GAIN); |
| 268 | static IIO_DEV_ATTR_ACTIVE_POWER_GAIN(S_IWUSR | S_IRUGO, |
| 269 | ade7759_read_16bit, |
| 270 | ade7759_write_16bit, |
| 271 | ADE7759_APGAIN); |
| 272 | static IIO_DEV_ATTR_CH_OFF(1, S_IWUSR | S_IRUGO, |
| 273 | ade7759_read_8bit, |
| 274 | ade7759_write_8bit, |
| 275 | ADE7759_CH1OS); |
| 276 | static IIO_DEV_ATTR_CH_OFF(2, S_IWUSR | S_IRUGO, |
| 277 | ade7759_read_8bit, |
| 278 | ade7759_write_8bit, |
| 279 | ADE7759_CH2OS); |
| 280 | |
| 281 | static int ade7759_set_irq(struct device *dev, bool enable) |
| 282 | { |
| 283 | int ret; |
| 284 | u8 irqen; |
Darshana Padmadas | b060471 | 2014-09-30 20:22:58 +0530 | [diff] [blame] | 285 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 286 | ret = ade7759_spi_read_reg_8(dev, ADE7759_IRQEN, &irqen); |
| 287 | if (ret) |
| 288 | goto error_ret; |
| 289 | |
| 290 | if (enable) |
| 291 | irqen |= 1 << 3; /* Enables an interrupt when a data is |
| 292 | present in the waveform register */ |
| 293 | else |
| 294 | irqen &= ~(1 << 3); |
| 295 | |
| 296 | ret = ade7759_spi_write_reg_8(dev, ADE7759_IRQEN, irqen); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 297 | |
| 298 | error_ret: |
| 299 | return ret; |
| 300 | } |
| 301 | |
| 302 | /* Power down the device */ |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 303 | static int ade7759_stop_device(struct device *dev) |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 304 | { |
Devendra Naga | 1e716a1 | 2015-01-02 04:02:55 -0500 | [diff] [blame] | 305 | int ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 306 | u16 val; |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 307 | |
Devendra Naga | 1e716a1 | 2015-01-02 04:02:55 -0500 | [diff] [blame] | 308 | ret = ade7759_spi_read_reg_16(dev, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 309 | ADE7759_MODE, |
| 310 | &val); |
Devendra Naga | 1e716a1 | 2015-01-02 04:02:55 -0500 | [diff] [blame] | 311 | if (ret < 0) { |
| 312 | dev_err(dev, "unable to power down the device, error: %d\n", |
| 313 | ret); |
| 314 | return ret; |
| 315 | } |
| 316 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 317 | val |= 1 << 4; /* AD converters can be turned off */ |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 318 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 319 | return ade7759_spi_write_reg_16(dev, ADE7759_MODE, val); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 320 | } |
| 321 | |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 322 | static int ade7759_initial_setup(struct iio_dev *indio_dev) |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 323 | { |
| 324 | int ret; |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 325 | struct ade7759_state *st = iio_priv(indio_dev); |
| 326 | struct device *dev = &indio_dev->dev; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 327 | |
| 328 | /* use low spi speed for init */ |
| 329 | st->us->mode = SPI_MODE_3; |
| 330 | spi_setup(st->us); |
| 331 | |
| 332 | /* Disable IRQ */ |
| 333 | ret = ade7759_set_irq(dev, false); |
| 334 | if (ret) { |
| 335 | dev_err(dev, "disable irq failed"); |
| 336 | goto err_ret; |
| 337 | } |
| 338 | |
| 339 | ade7759_reset(dev); |
| 340 | msleep(ADE7759_STARTUP_DELAY); |
| 341 | |
| 342 | err_ret: |
| 343 | return ret; |
| 344 | } |
| 345 | |
| 346 | static ssize_t ade7759_read_frequency(struct device *dev, |
| 347 | struct device_attribute *attr, |
| 348 | char *buf) |
| 349 | { |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 350 | int ret; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 351 | u16 t; |
| 352 | int sps; |
Darshana Padmadas | b060471 | 2014-09-30 20:22:58 +0530 | [diff] [blame] | 353 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 354 | ret = ade7759_spi_read_reg_16(dev, |
| 355 | ADE7759_MODE, |
| 356 | &t); |
| 357 | if (ret) |
| 358 | return ret; |
| 359 | |
| 360 | t = (t >> 3) & 0x3; |
| 361 | sps = 27900 / (1 + t); |
| 362 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 363 | return sprintf(buf, "%d\n", sps); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 364 | } |
| 365 | |
| 366 | static ssize_t ade7759_write_frequency(struct device *dev, |
| 367 | struct device_attribute *attr, |
| 368 | const char *buf, |
| 369 | size_t len) |
| 370 | { |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 371 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 372 | struct ade7759_state *st = iio_priv(indio_dev); |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 373 | u16 val; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 374 | int ret; |
| 375 | u16 reg, t; |
| 376 | |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 377 | ret = kstrtou16(buf, 10, &val); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 378 | if (ret) |
| 379 | return ret; |
Dan Carpenter | 50d4b30 | 2012-08-18 09:48:00 +0100 | [diff] [blame] | 380 | if (val == 0) |
| 381 | return -EINVAL; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 382 | |
| 383 | mutex_lock(&indio_dev->mlock); |
| 384 | |
Haneen Mohammed | 5db4851 | 2015-03-13 20:47:22 +0300 | [diff] [blame] | 385 | t = 27900 / val; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 386 | if (t > 0) |
| 387 | t--; |
| 388 | |
| 389 | if (t > 1) |
| 390 | st->us->max_speed_hz = ADE7759_SPI_SLOW; |
| 391 | else |
| 392 | st->us->max_speed_hz = ADE7759_SPI_FAST; |
| 393 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 394 | ret = ade7759_spi_read_reg_16(dev, ADE7759_MODE, ®); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 395 | if (ret) |
| 396 | goto out; |
| 397 | |
| 398 | reg &= ~(3 << 13); |
| 399 | reg |= t << 13; |
| 400 | |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 401 | ret = ade7759_spi_write_reg_16(dev, ADE7759_MODE, reg); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 402 | |
| 403 | out: |
| 404 | mutex_unlock(&indio_dev->mlock); |
| 405 | |
| 406 | return ret ? ret : len; |
| 407 | } |
| 408 | static IIO_DEV_ATTR_TEMP_RAW(ade7759_read_8bit); |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 409 | static IIO_CONST_ATTR(in_temp_offset, "70 C"); |
| 410 | static IIO_CONST_ATTR(in_temp_scale, "1 C"); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 411 | |
| 412 | static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, |
| 413 | ade7759_read_frequency, |
| 414 | ade7759_write_frequency); |
| 415 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 416 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("27900 14000 7000 3500"); |
| 417 | |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 418 | static struct attribute *ade7759_attributes[] = { |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 419 | &iio_dev_attr_in_temp_raw.dev_attr.attr, |
| 420 | &iio_const_attr_in_temp_offset.dev_attr.attr, |
| 421 | &iio_const_attr_in_temp_scale.dev_attr.attr, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 422 | &iio_dev_attr_sampling_frequency.dev_attr.attr, |
| 423 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 424 | &iio_dev_attr_phcal.dev_attr.attr, |
| 425 | &iio_dev_attr_cfden.dev_attr.attr, |
| 426 | &iio_dev_attr_aenergy.dev_attr.attr, |
| 427 | &iio_dev_attr_cfnum.dev_attr.attr, |
| 428 | &iio_dev_attr_apos.dev_attr.attr, |
| 429 | &iio_dev_attr_sagcyc.dev_attr.attr, |
| 430 | &iio_dev_attr_saglvl.dev_attr.attr, |
| 431 | &iio_dev_attr_linecyc.dev_attr.attr, |
| 432 | &iio_dev_attr_lenergy.dev_attr.attr, |
| 433 | &iio_dev_attr_chksum.dev_attr.attr, |
| 434 | &iio_dev_attr_pga_gain.dev_attr.attr, |
| 435 | &iio_dev_attr_active_power_gain.dev_attr.attr, |
| 436 | &iio_dev_attr_choff_1.dev_attr.attr, |
| 437 | &iio_dev_attr_choff_2.dev_attr.attr, |
| 438 | NULL, |
| 439 | }; |
| 440 | |
| 441 | static const struct attribute_group ade7759_attribute_group = { |
| 442 | .attrs = ade7759_attributes, |
| 443 | }; |
| 444 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 445 | static const struct iio_info ade7759_info = { |
| 446 | .attrs = &ade7759_attribute_group, |
| 447 | .driver_module = THIS_MODULE, |
| 448 | }; |
| 449 | |
Bill Pemberton | 4ae1c61 | 2012-11-19 13:21:57 -0500 | [diff] [blame] | 450 | static int ade7759_probe(struct spi_device *spi) |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 451 | { |
Jonathan Cameron | 3859fac | 2011-02-11 14:07:42 +0000 | [diff] [blame] | 452 | int ret; |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 453 | struct ade7759_state *st; |
| 454 | struct iio_dev *indio_dev; |
| 455 | |
| 456 | /* setup the industrialio driver allocated elements */ |
Sachin Kamat | b67637a | 2013-09-11 10:55:00 +0100 | [diff] [blame] | 457 | indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); |
| 458 | if (!indio_dev) |
| 459 | return -ENOMEM; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 460 | /* this is only used for removal purposes */ |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 461 | spi_set_drvdata(spi, indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 462 | |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 463 | st = iio_priv(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 464 | st->us = spi; |
| 465 | mutex_init(&st->buf_lock); |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 466 | indio_dev->name = spi->dev.driver->name; |
| 467 | indio_dev->dev.parent = &spi->dev; |
| 468 | indio_dev->info = &ade7759_info; |
| 469 | indio_dev->modes = INDIO_DIRECT_MODE; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 470 | |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 471 | /* Get the device into a sane initial state */ |
| 472 | ret = ade7759_initial_setup(indio_dev); |
| 473 | if (ret) |
Sachin Kamat | b67637a | 2013-09-11 10:55:00 +0100 | [diff] [blame] | 474 | return ret; |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 475 | |
Cristina Opriceana | da29461 | 2015-03-12 19:10:31 +0200 | [diff] [blame] | 476 | return iio_device_register(indio_dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 477 | } |
| 478 | |
| 479 | /* fixme, confirm ordering in this function */ |
Bill Pemberton | 447d4f2 | 2012-11-19 13:26:37 -0500 | [diff] [blame] | 480 | static int ade7759_remove(struct spi_device *spi) |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 481 | { |
Jonathan Cameron | afc2ff0 | 2011-06-27 13:07:55 +0100 | [diff] [blame] | 482 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 483 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 484 | iio_device_unregister(indio_dev); |
Lars-Peter Clausen | e854bcc | 2012-09-22 09:56:00 +0100 | [diff] [blame] | 485 | ade7759_stop_device(&indio_dev->dev); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 486 | |
Lars-Peter Clausen | e854bcc | 2012-09-22 09:56:00 +0100 | [diff] [blame] | 487 | return 0; |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 488 | } |
| 489 | |
| 490 | static struct spi_driver ade7759_driver = { |
| 491 | .driver = { |
| 492 | .name = "ade7759", |
| 493 | .owner = THIS_MODULE, |
| 494 | }, |
| 495 | .probe = ade7759_probe, |
Bill Pemberton | e543acf | 2012-11-19 13:21:38 -0500 | [diff] [blame] | 496 | .remove = ade7759_remove, |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 497 | }; |
Lars-Peter Clausen | ae6ae6f | 2011-11-16 10:13:39 +0100 | [diff] [blame] | 498 | module_spi_driver(ade7759_driver); |
Barry Song | 2919fa5 | 2010-10-27 21:44:17 -0400 | [diff] [blame] | 499 | |
| 500 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| 501 | MODULE_DESCRIPTION("Analog Devices ADE7759 Active Energy Metering IC Driver"); |
| 502 | MODULE_LICENSE("GPL v2"); |
Lars-Peter Clausen | 55e4390 | 2011-11-16 08:53:31 +0100 | [diff] [blame] | 503 | MODULE_ALIAS("spi:ad7759"); |