Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 1 | /* |
| 2 | * ADE7754 Polyphase Multifunction Energy Metering IC 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 | 8d97a58 | 2010-10-27 21:44:15 -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 | 8d97a58 | 2010-10-27 21:44:15 -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 | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 23 | #include "meter.h" |
| 24 | #include "ade7754.h" |
| 25 | |
| 26 | static int ade7754_spi_write_reg_8(struct device *dev, |
| 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 | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 32 | struct ade7754_state *st = iio_priv(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 33 | |
| 34 | mutex_lock(&st->buf_lock); |
| 35 | st->tx[0] = ADE7754_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 ade7754_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 | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 50 | struct ade7754_state *st = iio_priv(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 51 | |
| 52 | mutex_lock(&st->buf_lock); |
| 53 | st->tx[0] = ADE7754_WRITE_REG(reg_address); |
| 54 | st->tx[1] = (value >> 8) & 0xFF; |
| 55 | st->tx[2] = value & 0xFF; |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 56 | ret = spi_write(st->us, st->tx, 3); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 57 | mutex_unlock(&st->buf_lock); |
| 58 | |
| 59 | return ret; |
| 60 | } |
| 61 | |
| 62 | static int ade7754_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 | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 67 | struct ade7754_state *st = iio_priv(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 68 | int ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 69 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 70 | ret = spi_w8r8(st->us, ADE7754_READ_REG(reg_address)); |
| 71 | if (ret < 0) { |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 72 | dev_err(&st->us->dev, "problem when reading 8 bit register 0x%02X", |
| 73 | reg_address); |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 74 | return ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 75 | } |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 76 | *val = ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 77 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 78 | return 0; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | static int ade7754_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 | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 86 | struct ade7754_state *st = iio_priv(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 87 | int ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 88 | |
Lars-Peter Clausen | 2359074 | 2013-09-27 16:34:29 +0200 | [diff] [blame] | 89 | ret = spi_w8r16be(st->us, ADE7754_READ_REG(reg_address)); |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 90 | if (ret < 0) { |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 91 | dev_err(&st->us->dev, "problem when reading 16 bit register 0x%02X", |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 92 | reg_address); |
| 93 | return ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 94 | } |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 95 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 96 | *val = ret; |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 97 | |
| 98 | return 0; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 99 | } |
| 100 | |
| 101 | static int ade7754_spi_read_reg_24(struct device *dev, |
| 102 | u8 reg_address, |
| 103 | u32 *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 | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 106 | struct ade7754_state *st = iio_priv(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -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 = 4, |
| 114 | }, |
| 115 | }; |
| 116 | |
| 117 | mutex_lock(&st->buf_lock); |
| 118 | st->tx[0] = ADE7754_READ_REG(reg_address); |
| 119 | st->tx[1] = 0; |
| 120 | st->tx[2] = 0; |
| 121 | st->tx[3] = 0; |
| 122 | |
Lars-Peter Clausen | ad6c46b | 2013-01-09 17:31:00 +0000 | [diff] [blame] | 123 | ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers)); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 124 | if (ret) { |
| 125 | dev_err(&st->us->dev, "problem when reading 24 bit register 0x%02X", |
| 126 | reg_address); |
| 127 | goto error_ret; |
| 128 | } |
| 129 | *val = (st->rx[1] << 16) | (st->rx[2] << 8) | st->rx[3]; |
| 130 | |
| 131 | error_ret: |
| 132 | mutex_unlock(&st->buf_lock); |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | static ssize_t ade7754_read_8bit(struct device *dev, |
| 137 | struct device_attribute *attr, |
| 138 | char *buf) |
| 139 | { |
| 140 | int ret; |
| 141 | u8 val = 0; |
| 142 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 143 | |
| 144 | ret = ade7754_spi_read_reg_8(dev, this_attr->address, &val); |
| 145 | if (ret) |
| 146 | return ret; |
| 147 | |
| 148 | return sprintf(buf, "%u\n", val); |
| 149 | } |
| 150 | |
| 151 | static ssize_t ade7754_read_16bit(struct device *dev, |
| 152 | struct device_attribute *attr, |
| 153 | char *buf) |
| 154 | { |
| 155 | int ret; |
| 156 | u16 val = 0; |
| 157 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 158 | |
| 159 | ret = ade7754_spi_read_reg_16(dev, this_attr->address, &val); |
| 160 | if (ret) |
| 161 | return ret; |
| 162 | |
| 163 | return sprintf(buf, "%u\n", val); |
| 164 | } |
| 165 | |
| 166 | static ssize_t ade7754_read_24bit(struct device *dev, |
| 167 | struct device_attribute *attr, |
| 168 | char *buf) |
| 169 | { |
| 170 | int ret; |
| 171 | u32 val = 0; |
| 172 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 173 | |
| 174 | ret = ade7754_spi_read_reg_24(dev, this_attr->address, &val); |
| 175 | if (ret) |
| 176 | return ret; |
| 177 | |
| 178 | return sprintf(buf, "%u\n", val & 0xFFFFFF); |
| 179 | } |
| 180 | |
| 181 | static ssize_t ade7754_write_8bit(struct device *dev, |
| 182 | struct device_attribute *attr, |
| 183 | const char *buf, |
| 184 | size_t len) |
| 185 | { |
| 186 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 187 | int ret; |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 188 | u8 val; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 189 | |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 190 | ret = kstrtou8(buf, 10, &val); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 191 | if (ret) |
| 192 | goto error_ret; |
| 193 | ret = ade7754_spi_write_reg_8(dev, this_attr->address, val); |
| 194 | |
| 195 | error_ret: |
| 196 | return ret ? ret : len; |
| 197 | } |
| 198 | |
| 199 | static ssize_t ade7754_write_16bit(struct device *dev, |
| 200 | struct device_attribute *attr, |
| 201 | const char *buf, |
| 202 | size_t len) |
| 203 | { |
| 204 | struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); |
| 205 | int ret; |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 206 | u16 val; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 207 | |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 208 | ret = kstrtou16(buf, 10, &val); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 209 | if (ret) |
| 210 | goto error_ret; |
| 211 | ret = ade7754_spi_write_reg_16(dev, this_attr->address, val); |
| 212 | |
| 213 | error_ret: |
| 214 | return ret ? ret : len; |
| 215 | } |
| 216 | |
| 217 | static int ade7754_reset(struct device *dev) |
| 218 | { |
Devendra Naga | abe4e26 | 2015-01-02 04:02:54 -0500 | [diff] [blame] | 219 | int ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 220 | u8 val; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 221 | |
Devendra Naga | abe4e26 | 2015-01-02 04:02:54 -0500 | [diff] [blame] | 222 | ret = ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val); |
| 223 | if (ret < 0) |
| 224 | return ret; |
| 225 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 226 | val |= 1 << 6; /* Software Chip Reset */ |
| 227 | return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 228 | } |
| 229 | |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 230 | static IIO_DEV_ATTR_AENERGY(ade7754_read_24bit, ADE7754_AENERGY); |
| 231 | static IIO_DEV_ATTR_LAENERGY(ade7754_read_24bit, ADE7754_LAENERGY); |
| 232 | static IIO_DEV_ATTR_VAENERGY(ade7754_read_24bit, ADE7754_VAENERGY); |
| 233 | static IIO_DEV_ATTR_LVAENERGY(ade7754_read_24bit, ADE7754_LVAENERGY); |
| 234 | static IIO_DEV_ATTR_VPEAK(S_IWUSR | S_IRUGO, |
| 235 | ade7754_read_8bit, |
| 236 | ade7754_write_8bit, |
| 237 | ADE7754_VPEAK); |
| 238 | static IIO_DEV_ATTR_IPEAK(S_IWUSR | S_IRUGO, |
| 239 | ade7754_read_8bit, |
| 240 | ade7754_write_8bit, |
| 241 | ADE7754_VPEAK); |
| 242 | static IIO_DEV_ATTR_APHCAL(S_IWUSR | S_IRUGO, |
| 243 | ade7754_read_8bit, |
| 244 | ade7754_write_8bit, |
| 245 | ADE7754_APHCAL); |
| 246 | static IIO_DEV_ATTR_BPHCAL(S_IWUSR | S_IRUGO, |
| 247 | ade7754_read_8bit, |
| 248 | ade7754_write_8bit, |
| 249 | ADE7754_BPHCAL); |
| 250 | static IIO_DEV_ATTR_CPHCAL(S_IWUSR | S_IRUGO, |
| 251 | ade7754_read_8bit, |
| 252 | ade7754_write_8bit, |
| 253 | ADE7754_CPHCAL); |
| 254 | static IIO_DEV_ATTR_AAPOS(S_IWUSR | S_IRUGO, |
| 255 | ade7754_read_16bit, |
| 256 | ade7754_write_16bit, |
| 257 | ADE7754_AAPOS); |
| 258 | static IIO_DEV_ATTR_BAPOS(S_IWUSR | S_IRUGO, |
| 259 | ade7754_read_16bit, |
| 260 | ade7754_write_16bit, |
| 261 | ADE7754_BAPOS); |
| 262 | static IIO_DEV_ATTR_CAPOS(S_IWUSR | S_IRUGO, |
| 263 | ade7754_read_16bit, |
| 264 | ade7754_write_16bit, |
| 265 | ADE7754_CAPOS); |
| 266 | static IIO_DEV_ATTR_WDIV(S_IWUSR | S_IRUGO, |
| 267 | ade7754_read_8bit, |
| 268 | ade7754_write_8bit, |
| 269 | ADE7754_WDIV); |
| 270 | static IIO_DEV_ATTR_VADIV(S_IWUSR | S_IRUGO, |
| 271 | ade7754_read_8bit, |
| 272 | ade7754_write_8bit, |
| 273 | ADE7754_VADIV); |
| 274 | static IIO_DEV_ATTR_CFNUM(S_IWUSR | S_IRUGO, |
| 275 | ade7754_read_16bit, |
| 276 | ade7754_write_16bit, |
| 277 | ADE7754_CFNUM); |
| 278 | static IIO_DEV_ATTR_CFDEN(S_IWUSR | S_IRUGO, |
| 279 | ade7754_read_16bit, |
| 280 | ade7754_write_16bit, |
| 281 | ADE7754_CFDEN); |
| 282 | static IIO_DEV_ATTR_ACTIVE_POWER_A_GAIN(S_IWUSR | S_IRUGO, |
| 283 | ade7754_read_16bit, |
| 284 | ade7754_write_16bit, |
| 285 | ADE7754_AAPGAIN); |
| 286 | static IIO_DEV_ATTR_ACTIVE_POWER_B_GAIN(S_IWUSR | S_IRUGO, |
| 287 | ade7754_read_16bit, |
| 288 | ade7754_write_16bit, |
| 289 | ADE7754_BAPGAIN); |
| 290 | static IIO_DEV_ATTR_ACTIVE_POWER_C_GAIN(S_IWUSR | S_IRUGO, |
| 291 | ade7754_read_16bit, |
| 292 | ade7754_write_16bit, |
| 293 | ADE7754_CAPGAIN); |
| 294 | static IIO_DEV_ATTR_AIRMS(S_IRUGO, |
| 295 | ade7754_read_24bit, |
| 296 | NULL, |
| 297 | ADE7754_AIRMS); |
| 298 | static IIO_DEV_ATTR_BIRMS(S_IRUGO, |
| 299 | ade7754_read_24bit, |
| 300 | NULL, |
| 301 | ADE7754_BIRMS); |
| 302 | static IIO_DEV_ATTR_CIRMS(S_IRUGO, |
| 303 | ade7754_read_24bit, |
| 304 | NULL, |
| 305 | ADE7754_CIRMS); |
| 306 | static IIO_DEV_ATTR_AVRMS(S_IRUGO, |
| 307 | ade7754_read_24bit, |
| 308 | NULL, |
| 309 | ADE7754_AVRMS); |
| 310 | static IIO_DEV_ATTR_BVRMS(S_IRUGO, |
| 311 | ade7754_read_24bit, |
| 312 | NULL, |
| 313 | ADE7754_BVRMS); |
| 314 | static IIO_DEV_ATTR_CVRMS(S_IRUGO, |
| 315 | ade7754_read_24bit, |
| 316 | NULL, |
| 317 | ADE7754_CVRMS); |
| 318 | static IIO_DEV_ATTR_AIRMSOS(S_IRUGO, |
| 319 | ade7754_read_16bit, |
| 320 | ade7754_write_16bit, |
| 321 | ADE7754_AIRMSOS); |
| 322 | static IIO_DEV_ATTR_BIRMSOS(S_IRUGO, |
| 323 | ade7754_read_16bit, |
| 324 | ade7754_write_16bit, |
| 325 | ADE7754_BIRMSOS); |
| 326 | static IIO_DEV_ATTR_CIRMSOS(S_IRUGO, |
| 327 | ade7754_read_16bit, |
| 328 | ade7754_write_16bit, |
| 329 | ADE7754_CIRMSOS); |
| 330 | static IIO_DEV_ATTR_AVRMSOS(S_IRUGO, |
| 331 | ade7754_read_16bit, |
| 332 | ade7754_write_16bit, |
| 333 | ADE7754_AVRMSOS); |
| 334 | static IIO_DEV_ATTR_BVRMSOS(S_IRUGO, |
| 335 | ade7754_read_16bit, |
| 336 | ade7754_write_16bit, |
| 337 | ADE7754_BVRMSOS); |
| 338 | static IIO_DEV_ATTR_CVRMSOS(S_IRUGO, |
| 339 | ade7754_read_16bit, |
| 340 | ade7754_write_16bit, |
| 341 | ADE7754_CVRMSOS); |
| 342 | |
| 343 | static int ade7754_set_irq(struct device *dev, bool enable) |
| 344 | { |
| 345 | int ret; |
| 346 | u16 irqen; |
Darshana Padmadas | 1592bfd | 2014-09-30 20:22:56 +0530 | [diff] [blame] | 347 | |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 348 | ret = ade7754_spi_read_reg_16(dev, ADE7754_IRQEN, &irqen); |
| 349 | if (ret) |
| 350 | goto error_ret; |
| 351 | |
| 352 | if (enable) |
| 353 | irqen |= 1 << 14; /* Enables an interrupt when a data is |
| 354 | present in the waveform register */ |
| 355 | else |
| 356 | irqen &= ~(1 << 14); |
| 357 | |
| 358 | ret = ade7754_spi_write_reg_16(dev, ADE7754_IRQEN, irqen); |
| 359 | if (ret) |
| 360 | goto error_ret; |
| 361 | |
| 362 | error_ret: |
| 363 | return ret; |
| 364 | } |
| 365 | |
| 366 | /* Power down the device */ |
| 367 | static int ade7754_stop_device(struct device *dev) |
| 368 | { |
Devendra Naga | abe4e26 | 2015-01-02 04:02:54 -0500 | [diff] [blame] | 369 | int ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 370 | u8 val; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 371 | |
Devendra Naga | abe4e26 | 2015-01-02 04:02:54 -0500 | [diff] [blame] | 372 | ret = ade7754_spi_read_reg_8(dev, ADE7754_OPMODE, &val); |
| 373 | if (ret < 0) { |
| 374 | dev_err(dev, "unable to power down the device, error: %d", |
| 375 | ret); |
| 376 | return ret; |
| 377 | } |
| 378 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 379 | val |= 7 << 3; /* ADE7754 powered down */ |
| 380 | return ade7754_spi_write_reg_8(dev, ADE7754_OPMODE, val); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 381 | } |
| 382 | |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 383 | static int ade7754_initial_setup(struct iio_dev *indio_dev) |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 384 | { |
| 385 | int ret; |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 386 | struct ade7754_state *st = iio_priv(indio_dev); |
| 387 | struct device *dev = &indio_dev->dev; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 388 | |
| 389 | /* use low spi speed for init */ |
| 390 | st->us->mode = SPI_MODE_3; |
| 391 | spi_setup(st->us); |
| 392 | |
| 393 | /* Disable IRQ */ |
| 394 | ret = ade7754_set_irq(dev, false); |
| 395 | if (ret) { |
| 396 | dev_err(dev, "disable irq failed"); |
| 397 | goto err_ret; |
| 398 | } |
| 399 | |
| 400 | ade7754_reset(dev); |
| 401 | msleep(ADE7754_STARTUP_DELAY); |
| 402 | |
| 403 | err_ret: |
| 404 | return ret; |
| 405 | } |
| 406 | |
| 407 | static ssize_t ade7754_read_frequency(struct device *dev, |
| 408 | struct device_attribute *attr, |
| 409 | char *buf) |
| 410 | { |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 411 | int ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 412 | u8 t; |
| 413 | int sps; |
Darshana Padmadas | 1592bfd | 2014-09-30 20:22:56 +0530 | [diff] [blame] | 414 | |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 415 | ret = ade7754_spi_read_reg_8(dev, |
| 416 | ADE7754_WAVMODE, |
| 417 | &t); |
| 418 | if (ret) |
| 419 | return ret; |
| 420 | |
| 421 | t = (t >> 3) & 0x3; |
| 422 | sps = 26000 / (1 + t); |
| 423 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 424 | return sprintf(buf, "%d\n", sps); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 425 | } |
| 426 | |
| 427 | static ssize_t ade7754_write_frequency(struct device *dev, |
| 428 | struct device_attribute *attr, |
| 429 | const char *buf, |
| 430 | size_t len) |
| 431 | { |
Lars-Peter Clausen | 196b59c | 2012-05-12 15:39:54 +0200 | [diff] [blame] | 432 | struct iio_dev *indio_dev = dev_to_iio_dev(dev); |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 433 | struct ade7754_state *st = iio_priv(indio_dev); |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 434 | u16 val; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 435 | int ret; |
| 436 | u8 reg, t; |
| 437 | |
Jingoo Han | e5e26dd | 2013-08-20 03:31:00 +0100 | [diff] [blame] | 438 | ret = kstrtou16(buf, 10, &val); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 439 | if (ret) |
| 440 | return ret; |
Dan Carpenter | 50d4b30 | 2012-08-18 09:48:00 +0100 | [diff] [blame] | 441 | if (val == 0) |
| 442 | return -EINVAL; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 443 | |
| 444 | mutex_lock(&indio_dev->mlock); |
| 445 | |
Haneen Mohammed | 5db4851 | 2015-03-13 20:47:22 +0300 | [diff] [blame] | 446 | t = 26000 / val; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 447 | if (t > 0) |
| 448 | t--; |
| 449 | |
| 450 | if (t > 1) |
| 451 | st->us->max_speed_hz = ADE7754_SPI_SLOW; |
| 452 | else |
| 453 | st->us->max_speed_hz = ADE7754_SPI_FAST; |
| 454 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 455 | ret = ade7754_spi_read_reg_8(dev, ADE7754_WAVMODE, ®); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 456 | if (ret) |
| 457 | goto out; |
| 458 | |
| 459 | reg &= ~(3 << 3); |
| 460 | reg |= t << 3; |
| 461 | |
Jonathan Cameron | 5a0326d | 2011-02-11 14:07:41 +0000 | [diff] [blame] | 462 | ret = ade7754_spi_write_reg_8(dev, ADE7754_WAVMODE, reg); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 463 | |
| 464 | out: |
| 465 | mutex_unlock(&indio_dev->mlock); |
| 466 | |
| 467 | return ret ? ret : len; |
| 468 | } |
| 469 | static IIO_DEV_ATTR_TEMP_RAW(ade7754_read_8bit); |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 470 | static IIO_CONST_ATTR(in_temp_offset, "129 C"); |
| 471 | static IIO_CONST_ATTR(in_temp_scale, "4 C"); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 472 | |
| 473 | static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, |
| 474 | ade7754_read_frequency, |
| 475 | ade7754_write_frequency); |
| 476 | |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 477 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("26000 13000 65000 33000"); |
| 478 | |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 479 | static struct attribute *ade7754_attributes[] = { |
Jonathan Cameron | 322c956 | 2011-09-14 13:01:23 +0100 | [diff] [blame] | 480 | &iio_dev_attr_in_temp_raw.dev_attr.attr, |
| 481 | &iio_const_attr_in_temp_offset.dev_attr.attr, |
| 482 | &iio_const_attr_in_temp_scale.dev_attr.attr, |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 483 | &iio_dev_attr_sampling_frequency.dev_attr.attr, |
| 484 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 485 | &iio_dev_attr_aenergy.dev_attr.attr, |
| 486 | &iio_dev_attr_laenergy.dev_attr.attr, |
| 487 | &iio_dev_attr_vaenergy.dev_attr.attr, |
| 488 | &iio_dev_attr_lvaenergy.dev_attr.attr, |
| 489 | &iio_dev_attr_vpeak.dev_attr.attr, |
| 490 | &iio_dev_attr_ipeak.dev_attr.attr, |
| 491 | &iio_dev_attr_aphcal.dev_attr.attr, |
| 492 | &iio_dev_attr_bphcal.dev_attr.attr, |
| 493 | &iio_dev_attr_cphcal.dev_attr.attr, |
| 494 | &iio_dev_attr_aapos.dev_attr.attr, |
| 495 | &iio_dev_attr_bapos.dev_attr.attr, |
| 496 | &iio_dev_attr_capos.dev_attr.attr, |
| 497 | &iio_dev_attr_wdiv.dev_attr.attr, |
| 498 | &iio_dev_attr_vadiv.dev_attr.attr, |
| 499 | &iio_dev_attr_cfnum.dev_attr.attr, |
| 500 | &iio_dev_attr_cfden.dev_attr.attr, |
| 501 | &iio_dev_attr_active_power_a_gain.dev_attr.attr, |
| 502 | &iio_dev_attr_active_power_b_gain.dev_attr.attr, |
| 503 | &iio_dev_attr_active_power_c_gain.dev_attr.attr, |
| 504 | &iio_dev_attr_airms.dev_attr.attr, |
| 505 | &iio_dev_attr_birms.dev_attr.attr, |
| 506 | &iio_dev_attr_cirms.dev_attr.attr, |
| 507 | &iio_dev_attr_avrms.dev_attr.attr, |
| 508 | &iio_dev_attr_bvrms.dev_attr.attr, |
| 509 | &iio_dev_attr_cvrms.dev_attr.attr, |
| 510 | &iio_dev_attr_airmsos.dev_attr.attr, |
| 511 | &iio_dev_attr_birmsos.dev_attr.attr, |
| 512 | &iio_dev_attr_cirmsos.dev_attr.attr, |
| 513 | &iio_dev_attr_avrmsos.dev_attr.attr, |
| 514 | &iio_dev_attr_bvrmsos.dev_attr.attr, |
| 515 | &iio_dev_attr_cvrmsos.dev_attr.attr, |
| 516 | NULL, |
| 517 | }; |
| 518 | |
| 519 | static const struct attribute_group ade7754_attribute_group = { |
| 520 | .attrs = ade7754_attributes, |
| 521 | }; |
| 522 | |
Jonathan Cameron | 6fe8135 | 2011-05-18 14:42:37 +0100 | [diff] [blame] | 523 | static const struct iio_info ade7754_info = { |
| 524 | .attrs = &ade7754_attribute_group, |
| 525 | .driver_module = THIS_MODULE, |
| 526 | }; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 527 | |
Bill Pemberton | 4ae1c61 | 2012-11-19 13:21:57 -0500 | [diff] [blame] | 528 | static int ade7754_probe(struct spi_device *spi) |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 529 | { |
Jonathan Cameron | 26d25ae | 2011-09-02 17:14:40 +0100 | [diff] [blame] | 530 | int ret; |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 531 | struct ade7754_state *st; |
| 532 | struct iio_dev *indio_dev; |
| 533 | |
| 534 | /* setup the industrialio driver allocated elements */ |
Sachin Kamat | fde9355 | 2013-09-11 10:55:00 +0100 | [diff] [blame] | 535 | indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); |
| 536 | if (!indio_dev) |
| 537 | return -ENOMEM; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 538 | /* this is only used for removal purposes */ |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 539 | spi_set_drvdata(spi, indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 540 | |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 541 | st = iio_priv(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 542 | st->us = spi; |
| 543 | mutex_init(&st->buf_lock); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 544 | |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 545 | indio_dev->name = spi->dev.driver->name; |
| 546 | indio_dev->dev.parent = &spi->dev; |
| 547 | indio_dev->info = &ade7754_info; |
| 548 | indio_dev->modes = INDIO_DIRECT_MODE; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 549 | |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 550 | /* Get the device into a sane initial state */ |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 551 | ret = ade7754_initial_setup(indio_dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 552 | if (ret) |
Cristina Opriceana | b72eb70 | 2015-03-29 16:14:39 +0300 | [diff] [blame] | 553 | goto powerdown_on_error; |
| 554 | ret = iio_device_register(indio_dev); |
| 555 | if (ret) |
| 556 | goto powerdown_on_error; |
| 557 | return ret; |
| 558 | |
| 559 | powerdown_on_error: |
| 560 | ade7754_stop_device(&indio_dev->dev); |
| 561 | return ret; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 562 | } |
| 563 | |
| 564 | /* fixme, confirm ordering in this function */ |
Bill Pemberton | 447d4f2 | 2012-11-19 13:26:37 -0500 | [diff] [blame] | 565 | static int ade7754_remove(struct spi_device *spi) |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 566 | { |
Jonathan Cameron | 57157d1 | 2011-06-27 13:07:49 +0100 | [diff] [blame] | 567 | struct iio_dev *indio_dev = spi_get_drvdata(spi); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 568 | |
Jonathan Cameron | d2fffd6 | 2011-10-14 14:46:58 +0100 | [diff] [blame] | 569 | iio_device_unregister(indio_dev); |
Lars-Peter Clausen | db314a1 | 2012-09-22 09:56:00 +0100 | [diff] [blame] | 570 | ade7754_stop_device(&indio_dev->dev); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 571 | |
Lars-Peter Clausen | db314a1 | 2012-09-22 09:56:00 +0100 | [diff] [blame] | 572 | return 0; |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | static struct spi_driver ade7754_driver = { |
| 576 | .driver = { |
| 577 | .name = "ade7754", |
| 578 | .owner = THIS_MODULE, |
| 579 | }, |
| 580 | .probe = ade7754_probe, |
Bill Pemberton | e543acf | 2012-11-19 13:21:38 -0500 | [diff] [blame] | 581 | .remove = ade7754_remove, |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 582 | }; |
Lars-Peter Clausen | ae6ae6f | 2011-11-16 10:13:39 +0100 | [diff] [blame] | 583 | module_spi_driver(ade7754_driver); |
Barry Song | 8d97a58 | 2010-10-27 21:44:15 -0400 | [diff] [blame] | 584 | |
| 585 | MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); |
| 586 | MODULE_DESCRIPTION("Analog Devices ADE7754 Polyphase Multifunction Energy Metering IC Driver"); |
| 587 | MODULE_LICENSE("GPL v2"); |
Lars-Peter Clausen | 55e4390 | 2011-11-16 08:53:31 +0100 | [diff] [blame] | 588 | MODULE_ALIAS("spi:ad7754"); |