Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1 | /* |
| 2 | * RPR-0521 ROHM Ambient Light and Proximity Sensor |
| 3 | * |
| 4 | * Copyright (c) 2015, Intel Corporation. |
| 5 | * |
| 6 | * This file is subject to the terms and conditions of version 2 of |
| 7 | * the GNU General Public License. See the file COPYING in the main |
| 8 | * directory of this archive for more details. |
| 9 | * |
| 10 | * IIO driver for RPR-0521RS (7-bit I2C slave address 0x38). |
| 11 | * |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 12 | * TODO: illuminance channel |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/i2c.h> |
| 18 | #include <linux/regmap.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/acpi.h> |
| 21 | |
| 22 | #include <linux/iio/iio.h> |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 23 | #include <linux/iio/buffer.h> |
| 24 | #include <linux/iio/trigger.h> |
| 25 | #include <linux/iio/trigger_consumer.h> |
| 26 | #include <linux/iio/triggered_buffer.h> |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 27 | #include <linux/iio/sysfs.h> |
| 28 | #include <linux/pm_runtime.h> |
| 29 | |
| 30 | #define RPR0521_REG_SYSTEM_CTRL 0x40 |
| 31 | #define RPR0521_REG_MODE_CTRL 0x41 |
| 32 | #define RPR0521_REG_ALS_CTRL 0x42 |
| 33 | #define RPR0521_REG_PXS_CTRL 0x43 |
| 34 | #define RPR0521_REG_PXS_DATA 0x44 /* 16-bit, little endian */ |
| 35 | #define RPR0521_REG_ALS_DATA0 0x46 /* 16-bit, little endian */ |
| 36 | #define RPR0521_REG_ALS_DATA1 0x48 /* 16-bit, little endian */ |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 37 | #define RPR0521_REG_INTERRUPT 0x4A |
Mikko Koivunen | 734c442 | 2017-05-18 15:12:55 +0300 | [diff] [blame] | 38 | #define RPR0521_REG_PS_OFFSET_LSB 0x53 |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 39 | #define RPR0521_REG_ID 0x92 |
| 40 | |
| 41 | #define RPR0521_MODE_ALS_MASK BIT(7) |
| 42 | #define RPR0521_MODE_PXS_MASK BIT(6) |
| 43 | #define RPR0521_MODE_MEAS_TIME_MASK GENMASK(3, 0) |
| 44 | #define RPR0521_ALS_DATA0_GAIN_MASK GENMASK(5, 4) |
| 45 | #define RPR0521_ALS_DATA0_GAIN_SHIFT 4 |
| 46 | #define RPR0521_ALS_DATA1_GAIN_MASK GENMASK(3, 2) |
| 47 | #define RPR0521_ALS_DATA1_GAIN_SHIFT 2 |
| 48 | #define RPR0521_PXS_GAIN_MASK GENMASK(5, 4) |
| 49 | #define RPR0521_PXS_GAIN_SHIFT 4 |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 50 | #define RPR0521_PXS_PERSISTENCE_MASK GENMASK(3, 0) |
| 51 | #define RPR0521_INTERRUPT_INT_TRIG_PS_MASK BIT(0) |
| 52 | #define RPR0521_INTERRUPT_INT_TRIG_ALS_MASK BIT(1) |
| 53 | #define RPR0521_INTERRUPT_INT_REASSERT_MASK BIT(3) |
| 54 | #define RPR0521_INTERRUPT_ALS_INT_STATUS_MASK BIT(6) |
| 55 | #define RPR0521_INTERRUPT_PS_INT_STATUS_MASK BIT(7) |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 56 | |
| 57 | #define RPR0521_MODE_ALS_ENABLE BIT(7) |
| 58 | #define RPR0521_MODE_ALS_DISABLE 0x00 |
| 59 | #define RPR0521_MODE_PXS_ENABLE BIT(6) |
| 60 | #define RPR0521_MODE_PXS_DISABLE 0x00 |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 61 | #define RPR0521_PXS_PERSISTENCE_DRDY 0x00 |
| 62 | |
| 63 | #define RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE BIT(0) |
| 64 | #define RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE 0x00 |
| 65 | #define RPR0521_INTERRUPT_INT_TRIG_ALS_ENABLE BIT(1) |
| 66 | #define RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE 0x00 |
| 67 | #define RPR0521_INTERRUPT_INT_REASSERT_ENABLE BIT(3) |
| 68 | #define RPR0521_INTERRUPT_INT_REASSERT_DISABLE 0x00 |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 69 | |
| 70 | #define RPR0521_MANUFACT_ID 0xE0 |
| 71 | #define RPR0521_DEFAULT_MEAS_TIME 0x06 /* ALS - 100ms, PXS - 100ms */ |
| 72 | |
| 73 | #define RPR0521_DRV_NAME "RPR0521" |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 74 | #define RPR0521_IRQ_NAME "rpr0521_event" |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 75 | #define RPR0521_REGMAP_NAME "rpr0521_regmap" |
| 76 | |
| 77 | #define RPR0521_SLEEP_DELAY_MS 2000 |
| 78 | |
| 79 | #define RPR0521_ALS_SCALE_AVAIL "0.007812 0.015625 0.5 1" |
| 80 | #define RPR0521_PXS_SCALE_AVAIL "0.125 0.5 1" |
| 81 | |
| 82 | struct rpr0521_gain { |
| 83 | int scale; |
| 84 | int uscale; |
| 85 | }; |
| 86 | |
| 87 | static const struct rpr0521_gain rpr0521_als_gain[4] = { |
| 88 | {1, 0}, /* x1 */ |
| 89 | {0, 500000}, /* x2 */ |
| 90 | {0, 15625}, /* x64 */ |
| 91 | {0, 7812}, /* x128 */ |
| 92 | }; |
| 93 | |
| 94 | static const struct rpr0521_gain rpr0521_pxs_gain[3] = { |
| 95 | {1, 0}, /* x1 */ |
| 96 | {0, 500000}, /* x2 */ |
| 97 | {0, 125000}, /* x4 */ |
| 98 | }; |
| 99 | |
| 100 | enum rpr0521_channel { |
Mikko Koivunen | 9ece370 | 2017-05-18 15:12:56 +0300 | [diff] [blame] | 101 | RPR0521_CHAN_PXS, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 102 | RPR0521_CHAN_ALS_DATA0, |
| 103 | RPR0521_CHAN_ALS_DATA1, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 104 | }; |
| 105 | |
| 106 | struct rpr0521_reg_desc { |
| 107 | u8 address; |
| 108 | u8 device_mask; |
| 109 | }; |
| 110 | |
| 111 | static const struct rpr0521_reg_desc rpr0521_data_reg[] = { |
Mikko Koivunen | 9ece370 | 2017-05-18 15:12:56 +0300 | [diff] [blame] | 112 | [RPR0521_CHAN_PXS] = { |
| 113 | .address = RPR0521_REG_PXS_DATA, |
| 114 | .device_mask = RPR0521_MODE_PXS_MASK, |
| 115 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 116 | [RPR0521_CHAN_ALS_DATA0] = { |
| 117 | .address = RPR0521_REG_ALS_DATA0, |
| 118 | .device_mask = RPR0521_MODE_ALS_MASK, |
| 119 | }, |
| 120 | [RPR0521_CHAN_ALS_DATA1] = { |
| 121 | .address = RPR0521_REG_ALS_DATA1, |
| 122 | .device_mask = RPR0521_MODE_ALS_MASK, |
| 123 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 124 | }; |
| 125 | |
| 126 | static const struct rpr0521_gain_info { |
| 127 | u8 reg; |
| 128 | u8 mask; |
| 129 | u8 shift; |
| 130 | const struct rpr0521_gain *gain; |
| 131 | int size; |
| 132 | } rpr0521_gain[] = { |
Mikko Koivunen | 9ece370 | 2017-05-18 15:12:56 +0300 | [diff] [blame] | 133 | [RPR0521_CHAN_PXS] = { |
| 134 | .reg = RPR0521_REG_PXS_CTRL, |
| 135 | .mask = RPR0521_PXS_GAIN_MASK, |
| 136 | .shift = RPR0521_PXS_GAIN_SHIFT, |
| 137 | .gain = rpr0521_pxs_gain, |
| 138 | .size = ARRAY_SIZE(rpr0521_pxs_gain), |
| 139 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 140 | [RPR0521_CHAN_ALS_DATA0] = { |
| 141 | .reg = RPR0521_REG_ALS_CTRL, |
| 142 | .mask = RPR0521_ALS_DATA0_GAIN_MASK, |
| 143 | .shift = RPR0521_ALS_DATA0_GAIN_SHIFT, |
| 144 | .gain = rpr0521_als_gain, |
| 145 | .size = ARRAY_SIZE(rpr0521_als_gain), |
| 146 | }, |
| 147 | [RPR0521_CHAN_ALS_DATA1] = { |
| 148 | .reg = RPR0521_REG_ALS_CTRL, |
| 149 | .mask = RPR0521_ALS_DATA1_GAIN_MASK, |
| 150 | .shift = RPR0521_ALS_DATA1_GAIN_SHIFT, |
| 151 | .gain = rpr0521_als_gain, |
| 152 | .size = ARRAY_SIZE(rpr0521_als_gain), |
| 153 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 154 | }; |
| 155 | |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 156 | struct rpr0521_samp_freq { |
| 157 | int als_hz; |
| 158 | int als_uhz; |
| 159 | int pxs_hz; |
| 160 | int pxs_uhz; |
| 161 | }; |
| 162 | |
| 163 | static const struct rpr0521_samp_freq rpr0521_samp_freq_i[13] = { |
| 164 | /* {ALS, PXS}, W==currently writable option */ |
| 165 | {0, 0, 0, 0}, /* W0000, 0=standby */ |
| 166 | {0, 0, 100, 0}, /* 0001 */ |
| 167 | {0, 0, 25, 0}, /* 0010 */ |
| 168 | {0, 0, 10, 0}, /* 0011 */ |
| 169 | {0, 0, 2, 500000}, /* 0100 */ |
| 170 | {10, 0, 20, 0}, /* 0101 */ |
| 171 | {10, 0, 10, 0}, /* W0110 */ |
| 172 | {10, 0, 2, 500000}, /* 0111 */ |
| 173 | {2, 500000, 20, 0}, /* 1000, measurement 100ms, sleep 300ms */ |
| 174 | {2, 500000, 10, 0}, /* 1001, measurement 100ms, sleep 300ms */ |
| 175 | {2, 500000, 0, 0}, /* 1010, high sensitivity mode */ |
| 176 | {2, 500000, 2, 500000}, /* W1011, high sensitivity mode */ |
| 177 | {20, 0, 20, 0} /* 1100, ALS_data x 0.5, see specification P.18 */ |
| 178 | }; |
| 179 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 180 | struct rpr0521_data { |
| 181 | struct i2c_client *client; |
| 182 | |
| 183 | /* protect device params updates (e.g state, gain) */ |
| 184 | struct mutex lock; |
| 185 | |
| 186 | /* device active status */ |
| 187 | bool als_dev_en; |
| 188 | bool pxs_dev_en; |
| 189 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 190 | struct iio_trigger *drdy_trigger0; |
| 191 | s64 irq_timestamp; |
| 192 | |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 193 | /* optimize runtime pm ops - enable/disable device only if needed */ |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 194 | bool als_ps_need_en; |
| 195 | bool pxs_ps_need_en; |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 196 | bool als_need_dis; |
| 197 | bool pxs_need_dis; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 198 | |
| 199 | struct regmap *regmap; |
| 200 | }; |
| 201 | |
| 202 | static IIO_CONST_ATTR(in_intensity_scale_available, RPR0521_ALS_SCALE_AVAIL); |
| 203 | static IIO_CONST_ATTR(in_proximity_scale_available, RPR0521_PXS_SCALE_AVAIL); |
| 204 | |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 205 | /* |
| 206 | * Start with easy freq first, whole table of freq combinations is more |
| 207 | * complicated. |
| 208 | */ |
| 209 | static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("2.5 10"); |
| 210 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 211 | static struct attribute *rpr0521_attributes[] = { |
| 212 | &iio_const_attr_in_intensity_scale_available.dev_attr.attr, |
| 213 | &iio_const_attr_in_proximity_scale_available.dev_attr.attr, |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 214 | &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 215 | NULL, |
| 216 | }; |
| 217 | |
| 218 | static const struct attribute_group rpr0521_attribute_group = { |
| 219 | .attrs = rpr0521_attributes, |
| 220 | }; |
| 221 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 222 | /* Order of the channel data in buffer */ |
| 223 | enum rpr0521_scan_index_order { |
| 224 | RPR0521_CHAN_INDEX_PXS, |
| 225 | RPR0521_CHAN_INDEX_BOTH, |
| 226 | RPR0521_CHAN_INDEX_IR, |
| 227 | }; |
| 228 | |
| 229 | static const unsigned long rpr0521_available_scan_masks[] = { |
| 230 | BIT(RPR0521_CHAN_INDEX_PXS) | BIT(RPR0521_CHAN_INDEX_BOTH) | |
| 231 | BIT(RPR0521_CHAN_INDEX_IR), |
| 232 | 0 |
| 233 | }; |
| 234 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 235 | static const struct iio_chan_spec rpr0521_channels[] = { |
| 236 | { |
Mikko Koivunen | 9ece370 | 2017-05-18 15:12:56 +0300 | [diff] [blame] | 237 | .type = IIO_PROXIMITY, |
| 238 | .address = RPR0521_CHAN_PXS, |
| 239 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 240 | BIT(IIO_CHAN_INFO_OFFSET) | |
| 241 | BIT(IIO_CHAN_INFO_SCALE), |
| 242 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 243 | .scan_index = RPR0521_CHAN_INDEX_PXS, |
| 244 | .scan_type = { |
| 245 | .sign = 'u', |
| 246 | .realbits = 16, |
| 247 | .storagebits = 16, |
| 248 | .endianness = IIO_LE, |
| 249 | }, |
Mikko Koivunen | 9ece370 | 2017-05-18 15:12:56 +0300 | [diff] [blame] | 250 | }, |
| 251 | { |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 252 | .type = IIO_INTENSITY, |
| 253 | .modified = 1, |
| 254 | .address = RPR0521_CHAN_ALS_DATA0, |
| 255 | .channel2 = IIO_MOD_LIGHT_BOTH, |
| 256 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 257 | BIT(IIO_CHAN_INFO_SCALE), |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 258 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 259 | .scan_index = RPR0521_CHAN_INDEX_BOTH, |
| 260 | .scan_type = { |
| 261 | .sign = 'u', |
| 262 | .realbits = 16, |
| 263 | .storagebits = 16, |
| 264 | .endianness = IIO_LE, |
| 265 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 266 | }, |
| 267 | { |
| 268 | .type = IIO_INTENSITY, |
| 269 | .modified = 1, |
| 270 | .address = RPR0521_CHAN_ALS_DATA1, |
| 271 | .channel2 = IIO_MOD_LIGHT_IR, |
| 272 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 273 | BIT(IIO_CHAN_INFO_SCALE), |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 274 | .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 275 | .scan_index = RPR0521_CHAN_INDEX_IR, |
| 276 | .scan_type = { |
| 277 | .sign = 'u', |
| 278 | .realbits = 16, |
| 279 | .storagebits = 16, |
| 280 | .endianness = IIO_LE, |
| 281 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 282 | }, |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 283 | }; |
| 284 | |
| 285 | static int rpr0521_als_enable(struct rpr0521_data *data, u8 status) |
| 286 | { |
| 287 | int ret; |
| 288 | |
| 289 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 290 | RPR0521_MODE_ALS_MASK, |
| 291 | status); |
| 292 | if (ret < 0) |
| 293 | return ret; |
| 294 | |
Mikko Koivunen | f87fa26 | 2017-05-18 15:12:49 +0300 | [diff] [blame] | 295 | if (status & RPR0521_MODE_ALS_MASK) |
| 296 | data->als_dev_en = true; |
| 297 | else |
| 298 | data->als_dev_en = false; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
| 303 | static int rpr0521_pxs_enable(struct rpr0521_data *data, u8 status) |
| 304 | { |
| 305 | int ret; |
| 306 | |
| 307 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 308 | RPR0521_MODE_PXS_MASK, |
| 309 | status); |
| 310 | if (ret < 0) |
| 311 | return ret; |
| 312 | |
Mikko Koivunen | f87fa26 | 2017-05-18 15:12:49 +0300 | [diff] [blame] | 313 | if (status & RPR0521_MODE_PXS_MASK) |
| 314 | data->pxs_dev_en = true; |
| 315 | else |
| 316 | data->pxs_dev_en = false; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | /** |
| 322 | * rpr0521_set_power_state - handles runtime PM state and sensors enabled status |
| 323 | * |
| 324 | * @data: rpr0521 device private data |
| 325 | * @on: state to be set for devices in @device_mask |
| 326 | * @device_mask: bitmask specifying for which device we need to update @on state |
| 327 | * |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 328 | * Calls for this function must be balanced so that each ON should have matching |
| 329 | * OFF. Otherwise pm usage_count gets out of sync. |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 330 | */ |
| 331 | static int rpr0521_set_power_state(struct rpr0521_data *data, bool on, |
| 332 | u8 device_mask) |
| 333 | { |
| 334 | #ifdef CONFIG_PM |
| 335 | int ret; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 336 | |
| 337 | if (device_mask & RPR0521_MODE_ALS_MASK) { |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 338 | data->als_ps_need_en = on; |
| 339 | data->als_need_dis = !on; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 340 | } |
| 341 | |
| 342 | if (device_mask & RPR0521_MODE_PXS_MASK) { |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 343 | data->pxs_ps_need_en = on; |
| 344 | data->pxs_need_dis = !on; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 345 | } |
| 346 | |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 347 | /* |
| 348 | * On: _resume() is called only when we are suspended |
| 349 | * Off: _suspend() is called after delay if _resume() is not |
| 350 | * called before that. |
| 351 | * Note: If either measurement is re-enabled before _suspend(), |
| 352 | * both stay enabled until _suspend(). |
| 353 | */ |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 354 | if (on) { |
| 355 | ret = pm_runtime_get_sync(&data->client->dev); |
| 356 | } else { |
| 357 | pm_runtime_mark_last_busy(&data->client->dev); |
| 358 | ret = pm_runtime_put_autosuspend(&data->client->dev); |
| 359 | } |
| 360 | if (ret < 0) { |
| 361 | dev_err(&data->client->dev, |
| 362 | "Failed: rpr0521_set_power_state for %d, ret %d\n", |
| 363 | on, ret); |
| 364 | if (on) |
| 365 | pm_runtime_put_noidle(&data->client->dev); |
| 366 | |
| 367 | return ret; |
| 368 | } |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 369 | |
| 370 | if (on) { |
| 371 | /* If _resume() was not called, enable measurement now. */ |
| 372 | if (data->als_ps_need_en) { |
| 373 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); |
| 374 | if (ret) |
| 375 | return ret; |
| 376 | data->als_ps_need_en = false; |
| 377 | } |
| 378 | |
| 379 | if (data->pxs_ps_need_en) { |
| 380 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); |
| 381 | if (ret) |
| 382 | return ret; |
| 383 | data->pxs_ps_need_en = false; |
| 384 | } |
| 385 | } |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 386 | #endif |
| 387 | return 0; |
| 388 | } |
| 389 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 390 | /* Interrupt register tells if this sensor caused the interrupt or not. */ |
| 391 | static inline bool rpr0521_is_triggered(struct rpr0521_data *data) |
| 392 | { |
| 393 | int ret; |
| 394 | int reg; |
| 395 | |
| 396 | ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, ®); |
| 397 | if (ret < 0) |
| 398 | return false; /* Reg read failed. */ |
| 399 | if (reg & |
| 400 | (RPR0521_INTERRUPT_ALS_INT_STATUS_MASK | |
| 401 | RPR0521_INTERRUPT_PS_INT_STATUS_MASK)) |
| 402 | return true; |
| 403 | else |
| 404 | return false; /* Int not from this sensor. */ |
| 405 | } |
| 406 | |
| 407 | /* IRQ to trigger handler */ |
| 408 | static irqreturn_t rpr0521_drdy_irq_handler(int irq, void *private) |
| 409 | { |
| 410 | struct iio_dev *indio_dev = private; |
| 411 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 412 | |
| 413 | data->irq_timestamp = iio_get_time_ns(indio_dev); |
| 414 | /* |
| 415 | * We need to wake the thread to read the interrupt reg. It |
| 416 | * is not possible to do that here because regmap_read takes a |
| 417 | * mutex. |
| 418 | */ |
| 419 | |
| 420 | return IRQ_WAKE_THREAD; |
| 421 | } |
| 422 | |
| 423 | static irqreturn_t rpr0521_drdy_irq_thread(int irq, void *private) |
| 424 | { |
| 425 | struct iio_dev *indio_dev = private; |
| 426 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 427 | |
| 428 | if (rpr0521_is_triggered(data)) { |
| 429 | iio_trigger_poll_chained(data->drdy_trigger0); |
| 430 | return IRQ_HANDLED; |
| 431 | } |
| 432 | |
| 433 | return IRQ_NONE; |
| 434 | } |
| 435 | |
| 436 | static irqreturn_t rpr0521_trigger_consumer_store_time(int irq, void *p) |
| 437 | { |
| 438 | struct iio_poll_func *pf = p; |
| 439 | struct iio_dev *indio_dev = pf->indio_dev; |
| 440 | |
| 441 | /* Other trigger polls store time here. */ |
| 442 | if (!iio_trigger_using_own(indio_dev)) |
| 443 | pf->timestamp = iio_get_time_ns(indio_dev); |
| 444 | |
| 445 | return IRQ_WAKE_THREAD; |
| 446 | } |
| 447 | |
| 448 | static irqreturn_t rpr0521_trigger_consumer_handler(int irq, void *p) |
| 449 | { |
| 450 | struct iio_poll_func *pf = p; |
| 451 | struct iio_dev *indio_dev = pf->indio_dev; |
| 452 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 453 | int err; |
| 454 | |
| 455 | u8 buffer[16]; /* 3 16-bit channels + padding + ts */ |
| 456 | |
| 457 | /* Use irq timestamp when reasonable. */ |
| 458 | if (iio_trigger_using_own(indio_dev) && data->irq_timestamp) { |
| 459 | pf->timestamp = data->irq_timestamp; |
| 460 | data->irq_timestamp = 0; |
| 461 | } |
| 462 | /* Other chained trigger polls get timestamp only here. */ |
| 463 | if (!pf->timestamp) |
| 464 | pf->timestamp = iio_get_time_ns(indio_dev); |
| 465 | |
| 466 | err = regmap_bulk_read(data->regmap, RPR0521_REG_PXS_DATA, |
| 467 | &buffer, |
| 468 | (3 * 2) + 1); /* 3 * 16-bit + (discarded) int clear reg. */ |
| 469 | if (!err) |
| 470 | iio_push_to_buffers_with_timestamp(indio_dev, |
| 471 | buffer, pf->timestamp); |
| 472 | else |
| 473 | dev_err(&data->client->dev, |
| 474 | "Trigger consumer can't read from sensor.\n"); |
| 475 | pf->timestamp = 0; |
| 476 | |
| 477 | iio_trigger_notify_done(indio_dev->trig); |
| 478 | |
| 479 | return IRQ_HANDLED; |
| 480 | } |
| 481 | |
| 482 | static int rpr0521_write_int_enable(struct rpr0521_data *data) |
| 483 | { |
| 484 | int err; |
| 485 | |
| 486 | /* Interrupt after each measurement */ |
| 487 | err = regmap_update_bits(data->regmap, RPR0521_REG_PXS_CTRL, |
| 488 | RPR0521_PXS_PERSISTENCE_MASK, |
| 489 | RPR0521_PXS_PERSISTENCE_DRDY); |
| 490 | if (err) { |
| 491 | dev_err(&data->client->dev, "PS control reg write fail.\n"); |
| 492 | return -EBUSY; |
| 493 | } |
| 494 | |
| 495 | /* Ignore latch and mode because of drdy */ |
| 496 | err = regmap_write(data->regmap, RPR0521_REG_INTERRUPT, |
| 497 | RPR0521_INTERRUPT_INT_REASSERT_DISABLE | |
| 498 | RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE | |
| 499 | RPR0521_INTERRUPT_INT_TRIG_PS_ENABLE |
| 500 | ); |
| 501 | if (err) { |
| 502 | dev_err(&data->client->dev, "Interrupt setup write fail.\n"); |
| 503 | return -EBUSY; |
| 504 | } |
| 505 | |
| 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | static int rpr0521_write_int_disable(struct rpr0521_data *data) |
| 510 | { |
| 511 | /* Don't care of clearing mode, assert and latch. */ |
| 512 | return regmap_write(data->regmap, RPR0521_REG_INTERRUPT, |
| 513 | RPR0521_INTERRUPT_INT_TRIG_ALS_DISABLE | |
| 514 | RPR0521_INTERRUPT_INT_TRIG_PS_DISABLE |
| 515 | ); |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | * Trigger producer enable / disable. Note that there will be trigs only when |
| 520 | * measurement data is ready to be read. |
| 521 | */ |
| 522 | static int rpr0521_pxs_drdy_set_state(struct iio_trigger *trigger, |
| 523 | bool enable_drdy) |
| 524 | { |
| 525 | struct iio_dev *indio_dev = iio_trigger_get_drvdata(trigger); |
| 526 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 527 | int err; |
| 528 | |
| 529 | if (enable_drdy) |
| 530 | err = rpr0521_write_int_enable(data); |
| 531 | else |
| 532 | err = rpr0521_write_int_disable(data); |
| 533 | if (err) |
| 534 | dev_err(&data->client->dev, "rpr0521_pxs_drdy_set_state failed\n"); |
| 535 | |
| 536 | return err; |
| 537 | } |
| 538 | |
| 539 | static const struct iio_trigger_ops rpr0521_trigger_ops = { |
| 540 | .set_trigger_state = rpr0521_pxs_drdy_set_state, |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 541 | }; |
| 542 | |
| 543 | |
| 544 | static int rpr0521_buffer_preenable(struct iio_dev *indio_dev) |
| 545 | { |
| 546 | int err; |
| 547 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 548 | |
| 549 | mutex_lock(&data->lock); |
| 550 | err = rpr0521_set_power_state(data, true, |
| 551 | (RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK)); |
| 552 | mutex_unlock(&data->lock); |
| 553 | if (err) |
| 554 | dev_err(&data->client->dev, "_buffer_preenable fail\n"); |
| 555 | |
| 556 | return err; |
| 557 | } |
| 558 | |
| 559 | static int rpr0521_buffer_postdisable(struct iio_dev *indio_dev) |
| 560 | { |
| 561 | int err; |
| 562 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 563 | |
| 564 | mutex_lock(&data->lock); |
| 565 | err = rpr0521_set_power_state(data, false, |
| 566 | (RPR0521_MODE_PXS_MASK | RPR0521_MODE_ALS_MASK)); |
| 567 | mutex_unlock(&data->lock); |
| 568 | if (err) |
| 569 | dev_err(&data->client->dev, "_buffer_postdisable fail\n"); |
| 570 | |
| 571 | return err; |
| 572 | } |
| 573 | |
| 574 | static const struct iio_buffer_setup_ops rpr0521_buffer_setup_ops = { |
| 575 | .preenable = rpr0521_buffer_preenable, |
| 576 | .postenable = iio_triggered_buffer_postenable, |
| 577 | .predisable = iio_triggered_buffer_predisable, |
| 578 | .postdisable = rpr0521_buffer_postdisable, |
| 579 | }; |
| 580 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 581 | static int rpr0521_get_gain(struct rpr0521_data *data, int chan, |
| 582 | int *val, int *val2) |
| 583 | { |
| 584 | int ret, reg, idx; |
| 585 | |
| 586 | ret = regmap_read(data->regmap, rpr0521_gain[chan].reg, ®); |
| 587 | if (ret < 0) |
| 588 | return ret; |
| 589 | |
| 590 | idx = (rpr0521_gain[chan].mask & reg) >> rpr0521_gain[chan].shift; |
| 591 | *val = rpr0521_gain[chan].gain[idx].scale; |
| 592 | *val2 = rpr0521_gain[chan].gain[idx].uscale; |
| 593 | |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | static int rpr0521_set_gain(struct rpr0521_data *data, int chan, |
| 598 | int val, int val2) |
| 599 | { |
| 600 | int i, idx = -EINVAL; |
| 601 | |
| 602 | /* get gain index */ |
| 603 | for (i = 0; i < rpr0521_gain[chan].size; i++) |
| 604 | if (val == rpr0521_gain[chan].gain[i].scale && |
| 605 | val2 == rpr0521_gain[chan].gain[i].uscale) { |
| 606 | idx = i; |
| 607 | break; |
| 608 | } |
| 609 | |
| 610 | if (idx < 0) |
| 611 | return idx; |
| 612 | |
| 613 | return regmap_update_bits(data->regmap, rpr0521_gain[chan].reg, |
| 614 | rpr0521_gain[chan].mask, |
| 615 | idx << rpr0521_gain[chan].shift); |
| 616 | } |
| 617 | |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 618 | static int rpr0521_read_samp_freq(struct rpr0521_data *data, |
| 619 | enum iio_chan_type chan_type, |
| 620 | int *val, int *val2) |
| 621 | { |
| 622 | int reg, ret; |
| 623 | |
| 624 | ret = regmap_read(data->regmap, RPR0521_REG_MODE_CTRL, ®); |
| 625 | if (ret < 0) |
| 626 | return ret; |
| 627 | |
| 628 | reg &= RPR0521_MODE_MEAS_TIME_MASK; |
| 629 | if (reg >= ARRAY_SIZE(rpr0521_samp_freq_i)) |
| 630 | return -EINVAL; |
| 631 | |
| 632 | switch (chan_type) { |
| 633 | case IIO_INTENSITY: |
| 634 | *val = rpr0521_samp_freq_i[reg].als_hz; |
| 635 | *val2 = rpr0521_samp_freq_i[reg].als_uhz; |
| 636 | return 0; |
| 637 | |
| 638 | case IIO_PROXIMITY: |
| 639 | *val = rpr0521_samp_freq_i[reg].pxs_hz; |
| 640 | *val2 = rpr0521_samp_freq_i[reg].pxs_uhz; |
| 641 | return 0; |
| 642 | |
| 643 | default: |
| 644 | return -EINVAL; |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | static int rpr0521_write_samp_freq_common(struct rpr0521_data *data, |
| 649 | enum iio_chan_type chan_type, |
| 650 | int val, int val2) |
| 651 | { |
| 652 | int i; |
| 653 | |
| 654 | /* |
| 655 | * Ignore channel |
| 656 | * both pxs and als are setup only to same freq because of simplicity |
| 657 | */ |
| 658 | switch (val) { |
| 659 | case 0: |
| 660 | i = 0; |
| 661 | break; |
| 662 | |
| 663 | case 2: |
| 664 | if (val2 != 500000) |
| 665 | return -EINVAL; |
| 666 | |
| 667 | i = 11; |
| 668 | break; |
| 669 | |
| 670 | case 10: |
| 671 | i = 6; |
| 672 | break; |
| 673 | |
| 674 | default: |
| 675 | return -EINVAL; |
| 676 | } |
| 677 | |
| 678 | return regmap_update_bits(data->regmap, |
| 679 | RPR0521_REG_MODE_CTRL, |
| 680 | RPR0521_MODE_MEAS_TIME_MASK, |
| 681 | i); |
| 682 | } |
| 683 | |
Mikko Koivunen | 734c442 | 2017-05-18 15:12:55 +0300 | [diff] [blame] | 684 | static int rpr0521_read_ps_offset(struct rpr0521_data *data, int *offset) |
| 685 | { |
| 686 | int ret; |
| 687 | __le16 buffer; |
| 688 | |
| 689 | ret = regmap_bulk_read(data->regmap, |
| 690 | RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer)); |
| 691 | |
| 692 | if (ret < 0) { |
| 693 | dev_err(&data->client->dev, "Failed to read PS OFFSET register\n"); |
| 694 | return ret; |
| 695 | } |
| 696 | *offset = le16_to_cpu(buffer); |
| 697 | |
| 698 | return ret; |
| 699 | } |
| 700 | |
| 701 | static int rpr0521_write_ps_offset(struct rpr0521_data *data, int offset) |
| 702 | { |
| 703 | int ret; |
| 704 | __le16 buffer; |
| 705 | |
| 706 | buffer = cpu_to_le16(offset & 0x3ff); |
| 707 | ret = regmap_raw_write(data->regmap, |
| 708 | RPR0521_REG_PS_OFFSET_LSB, &buffer, sizeof(buffer)); |
| 709 | |
| 710 | if (ret < 0) { |
| 711 | dev_err(&data->client->dev, "Failed to write PS OFFSET register\n"); |
| 712 | return ret; |
| 713 | } |
| 714 | |
| 715 | return ret; |
| 716 | } |
| 717 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 718 | static int rpr0521_read_raw(struct iio_dev *indio_dev, |
| 719 | struct iio_chan_spec const *chan, int *val, |
| 720 | int *val2, long mask) |
| 721 | { |
| 722 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 723 | int ret; |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 724 | int busy; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 725 | u8 device_mask; |
| 726 | __le16 raw_data; |
| 727 | |
| 728 | switch (mask) { |
| 729 | case IIO_CHAN_INFO_RAW: |
| 730 | if (chan->type != IIO_INTENSITY && chan->type != IIO_PROXIMITY) |
| 731 | return -EINVAL; |
| 732 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 733 | busy = iio_device_claim_direct_mode(indio_dev); |
| 734 | if (busy) |
| 735 | return -EBUSY; |
| 736 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 737 | device_mask = rpr0521_data_reg[chan->address].device_mask; |
| 738 | |
| 739 | mutex_lock(&data->lock); |
| 740 | ret = rpr0521_set_power_state(data, true, device_mask); |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 741 | if (ret < 0) |
| 742 | goto rpr0521_read_raw_out; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 743 | |
| 744 | ret = regmap_bulk_read(data->regmap, |
| 745 | rpr0521_data_reg[chan->address].address, |
Mikko Koivunen | ae59165 | 2017-05-18 15:12:52 +0300 | [diff] [blame] | 746 | &raw_data, sizeof(raw_data)); |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 747 | if (ret < 0) { |
| 748 | rpr0521_set_power_state(data, false, device_mask); |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 749 | goto rpr0521_read_raw_out; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 750 | } |
| 751 | |
| 752 | ret = rpr0521_set_power_state(data, false, device_mask); |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 753 | |
| 754 | rpr0521_read_raw_out: |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 755 | mutex_unlock(&data->lock); |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 756 | iio_device_release_direct_mode(indio_dev); |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 757 | if (ret < 0) |
| 758 | return ret; |
| 759 | |
| 760 | *val = le16_to_cpu(raw_data); |
| 761 | |
| 762 | return IIO_VAL_INT; |
Mikko Koivunen | 624c389 | 2017-05-18 15:12:53 +0300 | [diff] [blame] | 763 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 764 | case IIO_CHAN_INFO_SCALE: |
| 765 | mutex_lock(&data->lock); |
| 766 | ret = rpr0521_get_gain(data, chan->address, val, val2); |
| 767 | mutex_unlock(&data->lock); |
| 768 | if (ret < 0) |
| 769 | return ret; |
| 770 | |
| 771 | return IIO_VAL_INT_PLUS_MICRO; |
Mikko Koivunen | 624c389 | 2017-05-18 15:12:53 +0300 | [diff] [blame] | 772 | |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 773 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 774 | mutex_lock(&data->lock); |
| 775 | ret = rpr0521_read_samp_freq(data, chan->type, val, val2); |
| 776 | mutex_unlock(&data->lock); |
| 777 | if (ret < 0) |
| 778 | return ret; |
| 779 | |
| 780 | return IIO_VAL_INT_PLUS_MICRO; |
| 781 | |
Mikko Koivunen | 734c442 | 2017-05-18 15:12:55 +0300 | [diff] [blame] | 782 | case IIO_CHAN_INFO_OFFSET: |
| 783 | mutex_lock(&data->lock); |
| 784 | ret = rpr0521_read_ps_offset(data, val); |
| 785 | mutex_unlock(&data->lock); |
| 786 | if (ret < 0) |
| 787 | return ret; |
| 788 | |
| 789 | return IIO_VAL_INT; |
| 790 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 791 | default: |
| 792 | return -EINVAL; |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | static int rpr0521_write_raw(struct iio_dev *indio_dev, |
| 797 | struct iio_chan_spec const *chan, int val, |
| 798 | int val2, long mask) |
| 799 | { |
| 800 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 801 | int ret; |
| 802 | |
| 803 | switch (mask) { |
| 804 | case IIO_CHAN_INFO_SCALE: |
| 805 | mutex_lock(&data->lock); |
| 806 | ret = rpr0521_set_gain(data, chan->address, val, val2); |
| 807 | mutex_unlock(&data->lock); |
| 808 | |
| 809 | return ret; |
Mikko Koivunen | 624c389 | 2017-05-18 15:12:53 +0300 | [diff] [blame] | 810 | |
Mikko Koivunen | c91a88e | 2017-05-18 15:12:54 +0300 | [diff] [blame] | 811 | case IIO_CHAN_INFO_SAMP_FREQ: |
| 812 | mutex_lock(&data->lock); |
| 813 | ret = rpr0521_write_samp_freq_common(data, chan->type, |
| 814 | val, val2); |
| 815 | mutex_unlock(&data->lock); |
| 816 | |
| 817 | return ret; |
| 818 | |
Mikko Koivunen | 734c442 | 2017-05-18 15:12:55 +0300 | [diff] [blame] | 819 | case IIO_CHAN_INFO_OFFSET: |
| 820 | mutex_lock(&data->lock); |
| 821 | ret = rpr0521_write_ps_offset(data, val); |
| 822 | mutex_unlock(&data->lock); |
| 823 | |
| 824 | return ret; |
| 825 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 826 | default: |
| 827 | return -EINVAL; |
| 828 | } |
| 829 | } |
| 830 | |
| 831 | static const struct iio_info rpr0521_info = { |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 832 | .read_raw = rpr0521_read_raw, |
| 833 | .write_raw = rpr0521_write_raw, |
| 834 | .attrs = &rpr0521_attribute_group, |
| 835 | }; |
| 836 | |
| 837 | static int rpr0521_init(struct rpr0521_data *data) |
| 838 | { |
| 839 | int ret; |
| 840 | int id; |
| 841 | |
| 842 | ret = regmap_read(data->regmap, RPR0521_REG_ID, &id); |
| 843 | if (ret < 0) { |
| 844 | dev_err(&data->client->dev, "Failed to read REG_ID register\n"); |
| 845 | return ret; |
| 846 | } |
| 847 | |
| 848 | if (id != RPR0521_MANUFACT_ID) { |
| 849 | dev_err(&data->client->dev, "Wrong id, got %x, expected %x\n", |
| 850 | id, RPR0521_MANUFACT_ID); |
| 851 | return -ENODEV; |
| 852 | } |
| 853 | |
| 854 | /* set default measurement time - 100 ms for both ALS and PS */ |
| 855 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 856 | RPR0521_MODE_MEAS_TIME_MASK, |
| 857 | RPR0521_DEFAULT_MEAS_TIME); |
| 858 | if (ret) { |
| 859 | pr_err("regmap_update_bits returned %d\n", ret); |
| 860 | return ret; |
| 861 | } |
| 862 | |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 863 | #ifndef CONFIG_PM |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 864 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); |
| 865 | if (ret < 0) |
| 866 | return ret; |
| 867 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); |
| 868 | if (ret < 0) |
| 869 | return ret; |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 870 | #endif |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 871 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 872 | data->irq_timestamp = 0; |
| 873 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | static int rpr0521_poweroff(struct rpr0521_data *data) |
| 878 | { |
| 879 | int ret; |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 880 | int tmp; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 881 | |
| 882 | ret = regmap_update_bits(data->regmap, RPR0521_REG_MODE_CTRL, |
| 883 | RPR0521_MODE_ALS_MASK | |
| 884 | RPR0521_MODE_PXS_MASK, |
| 885 | RPR0521_MODE_ALS_DISABLE | |
| 886 | RPR0521_MODE_PXS_DISABLE); |
| 887 | if (ret < 0) |
| 888 | return ret; |
| 889 | |
| 890 | data->als_dev_en = false; |
| 891 | data->pxs_dev_en = false; |
| 892 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 893 | /* |
| 894 | * Int pin keeps state after power off. Set pin to high impedance |
| 895 | * mode to prevent power drain. |
| 896 | */ |
| 897 | ret = regmap_read(data->regmap, RPR0521_REG_INTERRUPT, &tmp); |
| 898 | if (ret) { |
| 899 | dev_err(&data->client->dev, "Failed to reset int pin.\n"); |
| 900 | return ret; |
| 901 | } |
| 902 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 903 | return 0; |
| 904 | } |
| 905 | |
| 906 | static bool rpr0521_is_volatile_reg(struct device *dev, unsigned int reg) |
| 907 | { |
| 908 | switch (reg) { |
| 909 | case RPR0521_REG_MODE_CTRL: |
| 910 | case RPR0521_REG_ALS_CTRL: |
| 911 | case RPR0521_REG_PXS_CTRL: |
| 912 | return false; |
| 913 | default: |
| 914 | return true; |
| 915 | } |
| 916 | } |
| 917 | |
| 918 | static const struct regmap_config rpr0521_regmap_config = { |
| 919 | .name = RPR0521_REGMAP_NAME, |
| 920 | |
| 921 | .reg_bits = 8, |
| 922 | .val_bits = 8, |
| 923 | |
| 924 | .max_register = RPR0521_REG_ID, |
| 925 | .cache_type = REGCACHE_RBTREE, |
| 926 | .volatile_reg = rpr0521_is_volatile_reg, |
| 927 | }; |
| 928 | |
| 929 | static int rpr0521_probe(struct i2c_client *client, |
| 930 | const struct i2c_device_id *id) |
| 931 | { |
| 932 | struct rpr0521_data *data; |
| 933 | struct iio_dev *indio_dev; |
| 934 | struct regmap *regmap; |
| 935 | int ret; |
| 936 | |
| 937 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); |
| 938 | if (!indio_dev) |
| 939 | return -ENOMEM; |
| 940 | |
| 941 | regmap = devm_regmap_init_i2c(client, &rpr0521_regmap_config); |
| 942 | if (IS_ERR(regmap)) { |
| 943 | dev_err(&client->dev, "regmap_init failed!\n"); |
| 944 | return PTR_ERR(regmap); |
| 945 | } |
| 946 | |
| 947 | data = iio_priv(indio_dev); |
| 948 | i2c_set_clientdata(client, indio_dev); |
| 949 | data->client = client; |
| 950 | data->regmap = regmap; |
| 951 | |
| 952 | mutex_init(&data->lock); |
| 953 | |
| 954 | indio_dev->dev.parent = &client->dev; |
| 955 | indio_dev->info = &rpr0521_info; |
| 956 | indio_dev->name = RPR0521_DRV_NAME; |
| 957 | indio_dev->channels = rpr0521_channels; |
| 958 | indio_dev->num_channels = ARRAY_SIZE(rpr0521_channels); |
| 959 | indio_dev->modes = INDIO_DIRECT_MODE; |
| 960 | |
| 961 | ret = rpr0521_init(data); |
| 962 | if (ret < 0) { |
| 963 | dev_err(&client->dev, "rpr0521 chip init failed\n"); |
| 964 | return ret; |
| 965 | } |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 966 | |
| 967 | ret = pm_runtime_set_active(&client->dev); |
| 968 | if (ret < 0) |
Mikko Koivunen | 12d7494 | 2017-05-18 15:12:50 +0300 | [diff] [blame] | 969 | goto err_poweroff; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 970 | |
| 971 | pm_runtime_enable(&client->dev); |
| 972 | pm_runtime_set_autosuspend_delay(&client->dev, RPR0521_SLEEP_DELAY_MS); |
| 973 | pm_runtime_use_autosuspend(&client->dev); |
| 974 | |
Mikko Koivunen | e12ffd2 | 2017-07-03 15:50:13 +0300 | [diff] [blame] | 975 | /* |
| 976 | * If sensor write/read is needed in _probe after _use_autosuspend, |
| 977 | * sensor needs to be _resumed first using rpr0521_set_power_state(). |
| 978 | */ |
| 979 | |
| 980 | /* IRQ to trigger setup */ |
| 981 | if (client->irq) { |
| 982 | /* Trigger0 producer setup */ |
| 983 | data->drdy_trigger0 = devm_iio_trigger_alloc( |
| 984 | indio_dev->dev.parent, |
| 985 | "%s-dev%d", indio_dev->name, indio_dev->id); |
| 986 | if (!data->drdy_trigger0) { |
| 987 | ret = -ENOMEM; |
| 988 | goto err_pm_disable; |
| 989 | } |
| 990 | data->drdy_trigger0->dev.parent = indio_dev->dev.parent; |
| 991 | data->drdy_trigger0->ops = &rpr0521_trigger_ops; |
| 992 | indio_dev->available_scan_masks = rpr0521_available_scan_masks; |
| 993 | iio_trigger_set_drvdata(data->drdy_trigger0, indio_dev); |
| 994 | |
| 995 | /* Ties irq to trigger producer handler. */ |
| 996 | ret = devm_request_threaded_irq(&client->dev, client->irq, |
| 997 | rpr0521_drdy_irq_handler, rpr0521_drdy_irq_thread, |
| 998 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 999 | RPR0521_IRQ_NAME, indio_dev); |
| 1000 | if (ret < 0) { |
| 1001 | dev_err(&client->dev, "request irq %d for trigger0 failed\n", |
| 1002 | client->irq); |
| 1003 | goto err_pm_disable; |
| 1004 | } |
| 1005 | |
| 1006 | ret = devm_iio_trigger_register(indio_dev->dev.parent, |
| 1007 | data->drdy_trigger0); |
| 1008 | if (ret) { |
| 1009 | dev_err(&client->dev, "iio trigger register failed\n"); |
| 1010 | goto err_pm_disable; |
| 1011 | } |
| 1012 | |
| 1013 | /* |
| 1014 | * Now whole pipe from physical interrupt (irq defined by |
| 1015 | * devicetree to device) to trigger0 output is set up. |
| 1016 | */ |
| 1017 | |
| 1018 | /* Trigger consumer setup */ |
| 1019 | ret = devm_iio_triggered_buffer_setup(indio_dev->dev.parent, |
| 1020 | indio_dev, |
| 1021 | rpr0521_trigger_consumer_store_time, |
| 1022 | rpr0521_trigger_consumer_handler, |
| 1023 | &rpr0521_buffer_setup_ops); |
| 1024 | if (ret < 0) { |
| 1025 | dev_err(&client->dev, "iio triggered buffer setup failed\n"); |
| 1026 | goto err_pm_disable; |
| 1027 | } |
| 1028 | } |
| 1029 | |
Mikko Koivunen | 12d7494 | 2017-05-18 15:12:50 +0300 | [diff] [blame] | 1030 | ret = iio_device_register(indio_dev); |
| 1031 | if (ret) |
| 1032 | goto err_pm_disable; |
| 1033 | |
| 1034 | return 0; |
| 1035 | |
| 1036 | err_pm_disable: |
| 1037 | pm_runtime_disable(&client->dev); |
| 1038 | pm_runtime_set_suspended(&client->dev); |
| 1039 | pm_runtime_put_noidle(&client->dev); |
| 1040 | err_poweroff: |
| 1041 | rpr0521_poweroff(data); |
| 1042 | |
| 1043 | return ret; |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | static int rpr0521_remove(struct i2c_client *client) |
| 1047 | { |
| 1048 | struct iio_dev *indio_dev = i2c_get_clientdata(client); |
| 1049 | |
Adriana Reus | 7d0ead5 | 2015-11-05 16:25:29 +0200 | [diff] [blame] | 1050 | iio_device_unregister(indio_dev); |
| 1051 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1052 | pm_runtime_disable(&client->dev); |
| 1053 | pm_runtime_set_suspended(&client->dev); |
| 1054 | pm_runtime_put_noidle(&client->dev); |
| 1055 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1056 | rpr0521_poweroff(iio_priv(indio_dev)); |
| 1057 | |
| 1058 | return 0; |
| 1059 | } |
| 1060 | |
| 1061 | #ifdef CONFIG_PM |
| 1062 | static int rpr0521_runtime_suspend(struct device *dev) |
| 1063 | { |
| 1064 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 1065 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 1066 | int ret; |
| 1067 | |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1068 | mutex_lock(&data->lock); |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 1069 | /* If measurements are enabled, enable them on resume */ |
| 1070 | if (!data->als_need_dis) |
| 1071 | data->als_ps_need_en = data->als_dev_en; |
| 1072 | if (!data->pxs_need_dis) |
| 1073 | data->pxs_ps_need_en = data->pxs_dev_en; |
| 1074 | |
| 1075 | /* disable channels and sets {als,pxs}_dev_en to false */ |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1076 | ret = rpr0521_poweroff(data); |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 1077 | regcache_mark_dirty(data->regmap); |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1078 | mutex_unlock(&data->lock); |
| 1079 | |
| 1080 | return ret; |
| 1081 | } |
| 1082 | |
| 1083 | static int rpr0521_runtime_resume(struct device *dev) |
| 1084 | { |
| 1085 | struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev)); |
| 1086 | struct rpr0521_data *data = iio_priv(indio_dev); |
| 1087 | int ret; |
| 1088 | |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 1089 | regcache_sync(data->regmap); |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1090 | if (data->als_ps_need_en) { |
| 1091 | ret = rpr0521_als_enable(data, RPR0521_MODE_ALS_ENABLE); |
| 1092 | if (ret < 0) |
| 1093 | return ret; |
| 1094 | data->als_ps_need_en = false; |
| 1095 | } |
| 1096 | |
| 1097 | if (data->pxs_ps_need_en) { |
| 1098 | ret = rpr0521_pxs_enable(data, RPR0521_MODE_PXS_ENABLE); |
| 1099 | if (ret < 0) |
| 1100 | return ret; |
| 1101 | data->pxs_ps_need_en = false; |
| 1102 | } |
Mikko Koivunen | 484c314 | 2017-05-18 15:12:51 +0300 | [diff] [blame] | 1103 | msleep(100); //wait for first measurement result |
Daniel Baluta | efa86e9f | 2015-06-17 12:42:51 +0300 | [diff] [blame] | 1104 | |
| 1105 | return 0; |
| 1106 | } |
| 1107 | #endif |
| 1108 | |
| 1109 | static const struct dev_pm_ops rpr0521_pm_ops = { |
| 1110 | SET_RUNTIME_PM_OPS(rpr0521_runtime_suspend, |
| 1111 | rpr0521_runtime_resume, NULL) |
| 1112 | }; |
| 1113 | |
| 1114 | static const struct acpi_device_id rpr0521_acpi_match[] = { |
| 1115 | {"RPR0521", 0}, |
| 1116 | { } |
| 1117 | }; |
| 1118 | MODULE_DEVICE_TABLE(acpi, rpr0521_acpi_match); |
| 1119 | |
| 1120 | static const struct i2c_device_id rpr0521_id[] = { |
| 1121 | {"rpr0521", 0}, |
| 1122 | { } |
| 1123 | }; |
| 1124 | |
| 1125 | MODULE_DEVICE_TABLE(i2c, rpr0521_id); |
| 1126 | |
| 1127 | static struct i2c_driver rpr0521_driver = { |
| 1128 | .driver = { |
| 1129 | .name = RPR0521_DRV_NAME, |
| 1130 | .pm = &rpr0521_pm_ops, |
| 1131 | .acpi_match_table = ACPI_PTR(rpr0521_acpi_match), |
| 1132 | }, |
| 1133 | .probe = rpr0521_probe, |
| 1134 | .remove = rpr0521_remove, |
| 1135 | .id_table = rpr0521_id, |
| 1136 | }; |
| 1137 | |
| 1138 | module_i2c_driver(rpr0521_driver); |
| 1139 | |
| 1140 | MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); |
| 1141 | MODULE_DESCRIPTION("RPR0521 ROHM Ambient Light and Proximity Sensor driver"); |
| 1142 | MODULE_LICENSE("GPL v2"); |