Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 1 | /* |
| 2 | * IIO driver for the light sensor ISL29028. |
| 3 | * ISL29028 is Concurrent Ambient Light and Proximity Sensor |
| 4 | * |
| 5 | * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms and conditions of the GNU General Public License, |
| 9 | * version 2, as published by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 14 | * more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 18 | */ |
| 19 | |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/i2c.h> |
| 22 | #include <linux/err.h> |
| 23 | #include <linux/mutex.h> |
| 24 | #include <linux/delay.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/regmap.h> |
Jonathan Cameron | 06458e2 | 2012-04-25 15:54:58 +0100 | [diff] [blame] | 27 | #include <linux/iio/iio.h> |
| 28 | #include <linux/iio/sysfs.h> |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 29 | |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 30 | #define ISL29028_CONV_TIME_MS 100 |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 31 | |
| 32 | #define ISL29028_REG_CONFIGURE 0x01 |
| 33 | |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 34 | #define ISL29028_CONF_ALS_IR_MODE_ALS 0 |
| 35 | #define ISL29028_CONF_ALS_IR_MODE_IR BIT(0) |
| 36 | #define ISL29028_CONF_ALS_IR_MODE_MASK BIT(0) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 37 | |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 38 | #define ISL29028_CONF_ALS_RANGE_LOW_LUX 0 |
| 39 | #define ISL29028_CONF_ALS_RANGE_HIGH_LUX BIT(1) |
| 40 | #define ISL29028_CONF_ALS_RANGE_MASK BIT(1) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 41 | |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 42 | #define ISL29028_CONF_ALS_DIS 0 |
| 43 | #define ISL29028_CONF_ALS_EN BIT(2) |
| 44 | #define ISL29028_CONF_ALS_EN_MASK BIT(2) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 45 | |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 46 | #define ISL29028_CONF_PROX_SLP_SH 4 |
| 47 | #define ISL29028_CONF_PROX_SLP_MASK (7 << ISL29028_CONF_PROX_SLP_SH) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 48 | |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 49 | #define ISL29028_CONF_PROX_EN BIT(7) |
| 50 | #define ISL29028_CONF_PROX_EN_MASK BIT(7) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 51 | |
| 52 | #define ISL29028_REG_INTERRUPT 0x02 |
| 53 | |
| 54 | #define ISL29028_REG_PROX_DATA 0x08 |
| 55 | #define ISL29028_REG_ALSIR_L 0x09 |
| 56 | #define ISL29028_REG_ALSIR_U 0x0A |
| 57 | |
| 58 | #define ISL29028_REG_TEST1_MODE 0x0E |
| 59 | #define ISL29028_REG_TEST2_MODE 0x0F |
| 60 | |
| 61 | #define ISL29028_NUM_REGS (ISL29028_REG_TEST2_MODE + 1) |
| 62 | |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 63 | enum isl29028_als_ir_mode { |
| 64 | ISL29028_MODE_NONE = 0, |
| 65 | ISL29028_MODE_ALS, |
| 66 | ISL29028_MODE_IR, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 67 | }; |
| 68 | |
| 69 | struct isl29028_chip { |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 70 | struct mutex lock; |
| 71 | struct regmap *regmap; |
| 72 | |
| 73 | unsigned int prox_sampling; |
| 74 | bool enable_prox; |
| 75 | |
| 76 | int lux_scale; |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 77 | enum isl29028_als_ir_mode als_ir_mode; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 78 | }; |
| 79 | |
| 80 | static int isl29028_set_proxim_sampling(struct isl29028_chip *chip, |
Eva Rachel Retuya | ca52c88 | 2016-02-18 15:35:36 +0800 | [diff] [blame] | 81 | unsigned int sampling) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 82 | { |
| 83 | static unsigned int prox_period[] = {800, 400, 200, 100, 75, 50, 12, 0}; |
| 84 | int sel; |
| 85 | unsigned int period = DIV_ROUND_UP(1000, sampling); |
| 86 | |
| 87 | for (sel = 0; sel < ARRAY_SIZE(prox_period); ++sel) { |
| 88 | if (period >= prox_period[sel]) |
| 89 | break; |
| 90 | } |
| 91 | return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 92 | ISL29028_CONF_PROX_SLP_MASK, |
| 93 | sel << ISL29028_CONF_PROX_SLP_SH); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | static int isl29028_enable_proximity(struct isl29028_chip *chip, bool enable) |
| 97 | { |
| 98 | int ret; |
| 99 | int val = 0; |
| 100 | |
| 101 | if (enable) |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 102 | val = ISL29028_CONF_PROX_EN; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 103 | ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 104 | ISL29028_CONF_PROX_EN_MASK, val); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 105 | if (ret < 0) |
| 106 | return ret; |
| 107 | |
| 108 | /* Wait for conversion to be complete for first sample */ |
| 109 | mdelay(DIV_ROUND_UP(1000, chip->prox_sampling)); |
| 110 | return 0; |
| 111 | } |
| 112 | |
| 113 | static int isl29028_set_als_scale(struct isl29028_chip *chip, int lux_scale) |
| 114 | { |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 115 | int val = (lux_scale == 2000) ? ISL29028_CONF_ALS_RANGE_HIGH_LUX : |
| 116 | ISL29028_CONF_ALS_RANGE_LOW_LUX; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 117 | |
| 118 | return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 119 | ISL29028_CONF_ALS_RANGE_MASK, val); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 120 | } |
| 121 | |
| 122 | static int isl29028_set_als_ir_mode(struct isl29028_chip *chip, |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 123 | enum isl29028_als_ir_mode mode) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 124 | { |
| 125 | int ret = 0; |
| 126 | |
| 127 | switch (mode) { |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 128 | case ISL29028_MODE_ALS: |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 129 | ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 130 | ISL29028_CONF_ALS_IR_MODE_MASK, |
| 131 | ISL29028_CONF_ALS_IR_MODE_ALS); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 132 | if (ret < 0) |
| 133 | return ret; |
| 134 | |
| 135 | ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 136 | ISL29028_CONF_ALS_RANGE_MASK, |
| 137 | ISL29028_CONF_ALS_RANGE_HIGH_LUX); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 138 | break; |
| 139 | |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 140 | case ISL29028_MODE_IR: |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 141 | ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 142 | ISL29028_CONF_ALS_IR_MODE_MASK, |
| 143 | ISL29028_CONF_ALS_IR_MODE_IR); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 144 | break; |
| 145 | |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 146 | case ISL29028_MODE_NONE: |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 147 | return regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 148 | ISL29028_CONF_ALS_EN_MASK, ISL29028_CONF_ALS_DIS); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 149 | } |
| 150 | |
| 151 | if (ret < 0) |
| 152 | return ret; |
| 153 | |
| 154 | /* Enable the ALS/IR */ |
| 155 | ret = regmap_update_bits(chip->regmap, ISL29028_REG_CONFIGURE, |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 156 | ISL29028_CONF_ALS_EN_MASK, |
| 157 | ISL29028_CONF_ALS_EN); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 158 | if (ret < 0) |
| 159 | return ret; |
| 160 | |
| 161 | /* Need to wait for conversion time if ALS/IR mode enabled */ |
Peter Meerwald-Stadler | 3a37f1c | 2016-07-05 13:55:41 +0200 | [diff] [blame] | 162 | mdelay(ISL29028_CONV_TIME_MS); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 163 | return 0; |
| 164 | } |
| 165 | |
| 166 | static int isl29028_read_als_ir(struct isl29028_chip *chip, int *als_ir) |
| 167 | { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 168 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 169 | unsigned int lsb; |
| 170 | unsigned int msb; |
| 171 | int ret; |
| 172 | |
| 173 | ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_L, &lsb); |
| 174 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 175 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 176 | "Error in reading register ALSIR_L err %d\n", ret); |
| 177 | return ret; |
| 178 | } |
| 179 | |
| 180 | ret = regmap_read(chip->regmap, ISL29028_REG_ALSIR_U, &msb); |
| 181 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 182 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 183 | "Error in reading register ALSIR_U err %d\n", ret); |
| 184 | return ret; |
| 185 | } |
| 186 | |
| 187 | *als_ir = ((msb & 0xF) << 8) | (lsb & 0xFF); |
| 188 | return 0; |
| 189 | } |
| 190 | |
| 191 | static int isl29028_read_proxim(struct isl29028_chip *chip, int *prox) |
| 192 | { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 193 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 194 | unsigned int data; |
| 195 | int ret; |
| 196 | |
| 197 | ret = regmap_read(chip->regmap, ISL29028_REG_PROX_DATA, &data); |
| 198 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 199 | dev_err(dev, "Error in reading register %d, error %d\n", |
Eva Rachel Retuya | ca52c88 | 2016-02-18 15:35:36 +0800 | [diff] [blame] | 200 | ISL29028_REG_PROX_DATA, ret); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 201 | return ret; |
| 202 | } |
| 203 | *prox = data; |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static int isl29028_proxim_get(struct isl29028_chip *chip, int *prox_data) |
| 208 | { |
| 209 | int ret; |
| 210 | |
| 211 | if (!chip->enable_prox) { |
| 212 | ret = isl29028_enable_proximity(chip, true); |
| 213 | if (ret < 0) |
| 214 | return ret; |
| 215 | chip->enable_prox = true; |
| 216 | } |
| 217 | return isl29028_read_proxim(chip, prox_data); |
| 218 | } |
| 219 | |
| 220 | static int isl29028_als_get(struct isl29028_chip *chip, int *als_data) |
| 221 | { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 222 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 223 | int ret; |
| 224 | int als_ir_data; |
| 225 | |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 226 | if (chip->als_ir_mode != ISL29028_MODE_ALS) { |
| 227 | ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_ALS); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 228 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 229 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 230 | "Error in enabling ALS mode err %d\n", ret); |
| 231 | return ret; |
| 232 | } |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 233 | chip->als_ir_mode = ISL29028_MODE_ALS; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | ret = isl29028_read_als_ir(chip, &als_ir_data); |
| 237 | if (ret < 0) |
| 238 | return ret; |
| 239 | |
| 240 | /* |
| 241 | * convert als data count to lux. |
| 242 | * if lux_scale = 125, lux = count * 0.031 |
| 243 | * if lux_scale = 2000, lux = count * 0.49 |
| 244 | */ |
| 245 | if (chip->lux_scale == 125) |
| 246 | als_ir_data = (als_ir_data * 31) / 1000; |
| 247 | else |
| 248 | als_ir_data = (als_ir_data * 49) / 100; |
| 249 | |
| 250 | *als_data = als_ir_data; |
| 251 | return 0; |
| 252 | } |
| 253 | |
| 254 | static int isl29028_ir_get(struct isl29028_chip *chip, int *ir_data) |
| 255 | { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 256 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 257 | int ret; |
| 258 | |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 259 | if (chip->als_ir_mode != ISL29028_MODE_IR) { |
| 260 | ret = isl29028_set_als_ir_mode(chip, ISL29028_MODE_IR); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 261 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 262 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 263 | "Error in enabling IR mode err %d\n", ret); |
| 264 | return ret; |
| 265 | } |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 266 | chip->als_ir_mode = ISL29028_MODE_IR; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 267 | } |
| 268 | return isl29028_read_als_ir(chip, ir_data); |
| 269 | } |
| 270 | |
| 271 | /* Channel IO */ |
| 272 | static int isl29028_write_raw(struct iio_dev *indio_dev, |
Eva Rachel Retuya | ca52c88 | 2016-02-18 15:35:36 +0800 | [diff] [blame] | 273 | struct iio_chan_spec const *chan, |
| 274 | int val, int val2, long mask) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 275 | { |
| 276 | struct isl29028_chip *chip = iio_priv(indio_dev); |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 277 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 278 | int ret = -EINVAL; |
| 279 | |
| 280 | mutex_lock(&chip->lock); |
| 281 | switch (chan->type) { |
| 282 | case IIO_PROXIMITY: |
Laxman Dewangan | 892cb6d | 2012-04-16 21:27:42 +0530 | [diff] [blame] | 283 | if (mask != IIO_CHAN_INFO_SAMP_FREQ) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 284 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 285 | "proximity: mask value 0x%08lx not supported\n", |
| 286 | mask); |
| 287 | break; |
| 288 | } |
| 289 | if (val < 1 || val > 100) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 290 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 291 | "Samp_freq %d is not in range[1:100]\n", val); |
| 292 | break; |
| 293 | } |
| 294 | ret = isl29028_set_proxim_sampling(chip, val); |
| 295 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 296 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 297 | "Setting proximity samp_freq fail, err %d\n", |
| 298 | ret); |
| 299 | break; |
| 300 | } |
| 301 | chip->prox_sampling = val; |
| 302 | break; |
| 303 | |
| 304 | case IIO_LIGHT: |
Laxman Dewangan | 892cb6d | 2012-04-16 21:27:42 +0530 | [diff] [blame] | 305 | if (mask != IIO_CHAN_INFO_SCALE) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 306 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 307 | "light: mask value 0x%08lx not supported\n", |
| 308 | mask); |
| 309 | break; |
| 310 | } |
| 311 | if ((val != 125) && (val != 2000)) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 312 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 313 | "lux scale %d is invalid [125, 2000]\n", val); |
| 314 | break; |
| 315 | } |
| 316 | ret = isl29028_set_als_scale(chip, val); |
| 317 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 318 | dev_err(dev, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 319 | "Setting lux scale fail with error %d\n", ret); |
| 320 | break; |
| 321 | } |
| 322 | chip->lux_scale = val; |
| 323 | break; |
| 324 | |
| 325 | default: |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 326 | dev_err(dev, "Unsupported channel type\n"); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 327 | break; |
| 328 | } |
| 329 | mutex_unlock(&chip->lock); |
| 330 | return ret; |
| 331 | } |
| 332 | |
| 333 | static int isl29028_read_raw(struct iio_dev *indio_dev, |
Eva Rachel Retuya | ca52c88 | 2016-02-18 15:35:36 +0800 | [diff] [blame] | 334 | struct iio_chan_spec const *chan, |
| 335 | int *val, int *val2, long mask) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 336 | { |
| 337 | struct isl29028_chip *chip = iio_priv(indio_dev); |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 338 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 339 | int ret = -EINVAL; |
| 340 | |
| 341 | mutex_lock(&chip->lock); |
| 342 | switch (mask) { |
Jonathan Cameron | a8c0ed7 | 2012-04-15 17:41:29 +0100 | [diff] [blame] | 343 | case IIO_CHAN_INFO_RAW: |
| 344 | case IIO_CHAN_INFO_PROCESSED: |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 345 | switch (chan->type) { |
| 346 | case IIO_LIGHT: |
| 347 | ret = isl29028_als_get(chip, val); |
| 348 | break; |
| 349 | case IIO_INTENSITY: |
| 350 | ret = isl29028_ir_get(chip, val); |
| 351 | break; |
| 352 | case IIO_PROXIMITY: |
| 353 | ret = isl29028_proxim_get(chip, val); |
| 354 | break; |
| 355 | default: |
| 356 | break; |
| 357 | } |
| 358 | if (ret < 0) |
| 359 | break; |
| 360 | ret = IIO_VAL_INT; |
| 361 | break; |
| 362 | |
Laxman Dewangan | 892cb6d | 2012-04-16 21:27:42 +0530 | [diff] [blame] | 363 | case IIO_CHAN_INFO_SAMP_FREQ: |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 364 | if (chan->type != IIO_PROXIMITY) |
| 365 | break; |
| 366 | *val = chip->prox_sampling; |
| 367 | ret = IIO_VAL_INT; |
| 368 | break; |
| 369 | |
Laxman Dewangan | 892cb6d | 2012-04-16 21:27:42 +0530 | [diff] [blame] | 370 | case IIO_CHAN_INFO_SCALE: |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 371 | if (chan->type != IIO_LIGHT) |
| 372 | break; |
| 373 | *val = chip->lux_scale; |
| 374 | ret = IIO_VAL_INT; |
| 375 | break; |
| 376 | |
| 377 | default: |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 378 | dev_err(dev, "mask value 0x%08lx not supported\n", mask); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 379 | break; |
| 380 | } |
| 381 | mutex_unlock(&chip->lock); |
| 382 | return ret; |
| 383 | } |
| 384 | |
| 385 | static IIO_CONST_ATTR(in_proximity_sampling_frequency_available, |
Peter Meerwald-Stadler | b9b689c | 2016-07-05 13:55:43 +0200 | [diff] [blame] | 386 | "1 3 5 10 13 20 83 100"); |
| 387 | static IIO_CONST_ATTR(in_illuminance_scale_available, "125 2000"); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 388 | |
| 389 | #define ISL29028_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr) |
| 390 | #define ISL29028_CONST_ATTR(name) (&iio_const_attr_##name.dev_attr.attr) |
| 391 | static struct attribute *isl29028_attributes[] = { |
| 392 | ISL29028_CONST_ATTR(in_proximity_sampling_frequency_available), |
| 393 | ISL29028_CONST_ATTR(in_illuminance_scale_available), |
| 394 | NULL, |
| 395 | }; |
| 396 | |
| 397 | static const struct attribute_group isl29108_group = { |
| 398 | .attrs = isl29028_attributes, |
| 399 | }; |
| 400 | |
| 401 | static const struct iio_chan_spec isl29028_channels[] = { |
| 402 | { |
| 403 | .type = IIO_LIGHT, |
Jonathan Cameron | 93a9fdf | 2013-02-27 19:39:52 +0000 | [diff] [blame] | 404 | .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | |
| 405 | BIT(IIO_CHAN_INFO_SCALE), |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 406 | }, { |
| 407 | .type = IIO_INTENSITY, |
Jonathan Cameron | 93a9fdf | 2013-02-27 19:39:52 +0000 | [diff] [blame] | 408 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 409 | }, { |
| 410 | .type = IIO_PROXIMITY, |
Jonathan Cameron | 93a9fdf | 2013-02-27 19:39:52 +0000 | [diff] [blame] | 411 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
| 412 | BIT(IIO_CHAN_INFO_SAMP_FREQ), |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 413 | } |
| 414 | }; |
| 415 | |
| 416 | static const struct iio_info isl29028_info = { |
| 417 | .attrs = &isl29108_group, |
| 418 | .driver_module = THIS_MODULE, |
Bhumika Goyal | df27103 | 2016-02-12 20:40:28 +0530 | [diff] [blame] | 419 | .read_raw = isl29028_read_raw, |
| 420 | .write_raw = isl29028_write_raw, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 421 | }; |
| 422 | |
| 423 | static int isl29028_chip_init(struct isl29028_chip *chip) |
| 424 | { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 425 | struct device *dev = regmap_get_device(chip->regmap); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 426 | int ret; |
| 427 | |
| 428 | chip->enable_prox = false; |
| 429 | chip->prox_sampling = 20; |
| 430 | chip->lux_scale = 2000; |
Peter Meerwald-Stadler | bafaa6d | 2016-07-05 13:55:42 +0200 | [diff] [blame] | 431 | chip->als_ir_mode = ISL29028_MODE_NONE; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 432 | |
| 433 | ret = regmap_write(chip->regmap, ISL29028_REG_TEST1_MODE, 0x0); |
| 434 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 435 | dev_err(dev, "%s(): write to reg %d failed, err = %d\n", |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 436 | __func__, ISL29028_REG_TEST1_MODE, ret); |
| 437 | return ret; |
| 438 | } |
| 439 | ret = regmap_write(chip->regmap, ISL29028_REG_TEST2_MODE, 0x0); |
| 440 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 441 | dev_err(dev, "%s(): write to reg %d failed, err = %d\n", |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 442 | __func__, ISL29028_REG_TEST2_MODE, ret); |
| 443 | return ret; |
| 444 | } |
| 445 | |
| 446 | ret = regmap_write(chip->regmap, ISL29028_REG_CONFIGURE, 0x0); |
| 447 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 448 | dev_err(dev, "%s(): write to reg %d failed, err = %d\n", |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 449 | __func__, ISL29028_REG_CONFIGURE, ret); |
| 450 | return ret; |
| 451 | } |
| 452 | |
| 453 | ret = isl29028_set_proxim_sampling(chip, chip->prox_sampling); |
| 454 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 455 | dev_err(dev, "setting the proximity, err = %d\n", ret); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 456 | return ret; |
| 457 | } |
| 458 | |
| 459 | ret = isl29028_set_als_scale(chip, chip->lux_scale); |
| 460 | if (ret < 0) |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 461 | dev_err(dev, "setting als scale failed, err = %d\n", ret); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 462 | return ret; |
| 463 | } |
| 464 | |
Peter Meerwald-Stadler | f6127704 | 2016-07-05 13:55:44 +0200 | [diff] [blame] | 465 | static bool isl29028_is_volatile_reg(struct device *dev, unsigned int reg) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 466 | { |
| 467 | switch (reg) { |
| 468 | case ISL29028_REG_INTERRUPT: |
| 469 | case ISL29028_REG_PROX_DATA: |
| 470 | case ISL29028_REG_ALSIR_L: |
| 471 | case ISL29028_REG_ALSIR_U: |
| 472 | return true; |
| 473 | default: |
| 474 | return false; |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | static const struct regmap_config isl29028_regmap_config = { |
| 479 | .reg_bits = 8, |
| 480 | .val_bits = 8, |
Peter Meerwald-Stadler | f6127704 | 2016-07-05 13:55:44 +0200 | [diff] [blame] | 481 | .volatile_reg = isl29028_is_volatile_reg, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 482 | .max_register = ISL29028_NUM_REGS - 1, |
| 483 | .num_reg_defaults_raw = ISL29028_NUM_REGS, |
| 484 | .cache_type = REGCACHE_RBTREE, |
| 485 | }; |
| 486 | |
Bill Pemberton | 4ae1c61 | 2012-11-19 13:21:57 -0500 | [diff] [blame] | 487 | static int isl29028_probe(struct i2c_client *client, |
Eva Rachel Retuya | ca52c88 | 2016-02-18 15:35:36 +0800 | [diff] [blame] | 488 | const struct i2c_device_id *id) |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 489 | { |
| 490 | struct isl29028_chip *chip; |
| 491 | struct iio_dev *indio_dev; |
| 492 | int ret; |
| 493 | |
Sachin Kamat | 80cab1d | 2013-07-22 12:03:00 +0100 | [diff] [blame] | 494 | indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip)); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 495 | if (!indio_dev) { |
| 496 | dev_err(&client->dev, "iio allocation fails\n"); |
| 497 | return -ENOMEM; |
| 498 | } |
| 499 | |
| 500 | chip = iio_priv(indio_dev); |
| 501 | |
| 502 | i2c_set_clientdata(client, indio_dev); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 503 | mutex_init(&chip->lock); |
| 504 | |
| 505 | chip->regmap = devm_regmap_init_i2c(client, &isl29028_regmap_config); |
| 506 | if (IS_ERR(chip->regmap)) { |
| 507 | ret = PTR_ERR(chip->regmap); |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 508 | dev_err(&client->dev, "regmap initialization failed: %d\n", |
| 509 | ret); |
Sachin Kamat | 80cab1d | 2013-07-22 12:03:00 +0100 | [diff] [blame] | 510 | return ret; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 511 | } |
| 512 | |
| 513 | ret = isl29028_chip_init(chip); |
| 514 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 515 | dev_err(&client->dev, "chip initialization failed: %d\n", ret); |
Sachin Kamat | 80cab1d | 2013-07-22 12:03:00 +0100 | [diff] [blame] | 516 | return ret; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 517 | } |
| 518 | |
| 519 | indio_dev->info = &isl29028_info; |
| 520 | indio_dev->channels = isl29028_channels; |
| 521 | indio_dev->num_channels = ARRAY_SIZE(isl29028_channels); |
| 522 | indio_dev->name = id->name; |
| 523 | indio_dev->dev.parent = &client->dev; |
| 524 | indio_dev->modes = INDIO_DIRECT_MODE; |
Ioana Ciornei | 86727e3 | 2015-10-02 13:37:49 +0300 | [diff] [blame] | 525 | ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev); |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 526 | if (ret < 0) { |
Alison Schofield | 722fc31 | 2016-03-15 11:49:12 -0700 | [diff] [blame] | 527 | dev_err(&client->dev, |
| 528 | "iio registration fails with error %d\n", |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 529 | ret); |
Sachin Kamat | 80cab1d | 2013-07-22 12:03:00 +0100 | [diff] [blame] | 530 | return ret; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 531 | } |
| 532 | return 0; |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 533 | } |
| 534 | |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 535 | static const struct i2c_device_id isl29028_id[] = { |
| 536 | {"isl29028", 0}, |
| 537 | {} |
| 538 | }; |
| 539 | MODULE_DEVICE_TABLE(i2c, isl29028_id); |
| 540 | |
| 541 | static const struct of_device_id isl29028_of_match[] = { |
Arnaud Ebalard | 37e5157 | 2015-02-16 15:58:39 -0800 | [diff] [blame] | 542 | { .compatible = "isl,isl29028", }, /* for backward compat., don't use */ |
| 543 | { .compatible = "isil,isl29028", }, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 544 | { }, |
| 545 | }; |
| 546 | MODULE_DEVICE_TABLE(of, isl29028_of_match); |
| 547 | |
| 548 | static struct i2c_driver isl29028_driver = { |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 549 | .driver = { |
| 550 | .name = "isl29028", |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 551 | .of_match_table = isl29028_of_match, |
| 552 | }, |
| 553 | .probe = isl29028_probe, |
Laxman Dewangan | 6d59ba2 | 2012-04-13 16:03:32 +0530 | [diff] [blame] | 554 | .id_table = isl29028_id, |
| 555 | }; |
| 556 | |
| 557 | module_i2c_driver(isl29028_driver); |
| 558 | |
| 559 | MODULE_DESCRIPTION("ISL29028 Ambient Light and Proximity Sensor driver"); |
| 560 | MODULE_LICENSE("GPL v2"); |
| 561 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); |