.. | .. |
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| 1 | +// SPDX-License-Identifier: GPL-2.0-only |
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1 | 2 | /* |
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2 | 3 | * LTC2632 Digital to analog convertors spi driver |
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3 | 4 | * |
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4 | 5 | * Copyright 2017 Maxime Roussin-Bélanger |
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5 | 6 | * expanded by Silvan Murer <silvan.murer@gmail.com> |
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6 | | - * |
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7 | | - * Licensed under the GPL-2. |
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8 | 7 | */ |
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9 | 8 | |
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10 | 9 | #include <linux/device.h> |
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.. | .. |
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13 | 12 | #include <linux/iio/iio.h> |
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14 | 13 | #include <linux/regulator/consumer.h> |
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15 | 14 | |
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16 | | -#define LTC2632_DAC_CHANNELS 2 |
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17 | | - |
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18 | | -#define LTC2632_ADDR_DAC0 0x0 |
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19 | | -#define LTC2632_ADDR_DAC1 0x1 |
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| 15 | +#include <asm/unaligned.h> |
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20 | 16 | |
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21 | 17 | #define LTC2632_CMD_WRITE_INPUT_N 0x0 |
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22 | 18 | #define LTC2632_CMD_UPDATE_DAC_N 0x1 |
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.. | .. |
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30 | 26 | /** |
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31 | 27 | * struct ltc2632_chip_info - chip specific information |
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32 | 28 | * @channels: channel spec for the DAC |
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| 29 | + * @num_channels: DAC channel count of the chip |
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33 | 30 | * @vref_mv: internal reference voltage |
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34 | 31 | */ |
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35 | 32 | struct ltc2632_chip_info { |
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36 | 33 | const struct iio_chan_spec *channels; |
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| 34 | + const size_t num_channels; |
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37 | 35 | const int vref_mv; |
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38 | 36 | }; |
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39 | 37 | |
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40 | 38 | /** |
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41 | 39 | * struct ltc2632_state - driver instance specific data |
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42 | 40 | * @spi_dev: pointer to the spi_device struct |
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43 | | - * @powerdown_cache_mask used to show current channel powerdown state |
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44 | | - * @vref_mv used reference voltage (internal or external) |
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45 | | - * @vref_reg regulator for the reference voltage |
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| 41 | + * @powerdown_cache_mask: used to show current channel powerdown state |
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| 42 | + * @vref_mv: used reference voltage (internal or external) |
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| 43 | + * @vref_reg: regulator for the reference voltage |
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46 | 44 | */ |
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47 | 45 | struct ltc2632_state { |
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48 | 46 | struct spi_device *spi_dev; |
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.. | .. |
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58 | 56 | ID_LTC2632H12, |
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59 | 57 | ID_LTC2632H10, |
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60 | 58 | ID_LTC2632H8, |
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| 59 | + ID_LTC2634L12, |
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| 60 | + ID_LTC2634L10, |
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| 61 | + ID_LTC2634L8, |
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| 62 | + ID_LTC2634H12, |
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| 63 | + ID_LTC2634H10, |
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| 64 | + ID_LTC2634H8, |
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| 65 | + ID_LTC2636L12, |
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| 66 | + ID_LTC2636L10, |
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| 67 | + ID_LTC2636L8, |
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| 68 | + ID_LTC2636H12, |
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| 69 | + ID_LTC2636H10, |
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| 70 | + ID_LTC2636H8, |
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61 | 71 | }; |
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62 | 72 | |
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63 | 73 | static int ltc2632_spi_write(struct spi_device *spi, |
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.. | .. |
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74 | 84 | * 10-, 8-bit input code followed by 4, 6, or 8 don't care bits. |
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75 | 85 | */ |
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76 | 86 | data = (cmd << 20) | (addr << 16) | (val << shift); |
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77 | | - msg[0] = data >> 16; |
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78 | | - msg[1] = data >> 8; |
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79 | | - msg[2] = data; |
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| 87 | + put_unaligned_be24(data, &msg[0]); |
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80 | 88 | |
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81 | 89 | return spi_write(spi, msg, sizeof(msg)); |
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82 | 90 | } |
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.. | .. |
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191 | 199 | const struct iio_chan_spec _name ## _channels[] = { \ |
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192 | 200 | LTC2632_CHANNEL(0, _bits), \ |
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193 | 201 | LTC2632_CHANNEL(1, _bits), \ |
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| 202 | + LTC2632_CHANNEL(2, _bits), \ |
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| 203 | + LTC2632_CHANNEL(3, _bits), \ |
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| 204 | + LTC2632_CHANNEL(4, _bits), \ |
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| 205 | + LTC2632_CHANNEL(5, _bits), \ |
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| 206 | + LTC2632_CHANNEL(6, _bits), \ |
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| 207 | + LTC2632_CHANNEL(7, _bits), \ |
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194 | 208 | } |
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195 | 209 | |
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196 | | -static DECLARE_LTC2632_CHANNELS(ltc2632l12, 12); |
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197 | | -static DECLARE_LTC2632_CHANNELS(ltc2632l10, 10); |
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198 | | -static DECLARE_LTC2632_CHANNELS(ltc2632l8, 8); |
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199 | | - |
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200 | | -static DECLARE_LTC2632_CHANNELS(ltc2632h12, 12); |
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201 | | -static DECLARE_LTC2632_CHANNELS(ltc2632h10, 10); |
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202 | | -static DECLARE_LTC2632_CHANNELS(ltc2632h8, 8); |
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| 210 | +static DECLARE_LTC2632_CHANNELS(ltc2632x12, 12); |
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| 211 | +static DECLARE_LTC2632_CHANNELS(ltc2632x10, 10); |
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| 212 | +static DECLARE_LTC2632_CHANNELS(ltc2632x8, 8); |
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203 | 213 | |
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204 | 214 | static const struct ltc2632_chip_info ltc2632_chip_info_tbl[] = { |
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205 | 215 | [ID_LTC2632L12] = { |
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206 | | - .channels = ltc2632l12_channels, |
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| 216 | + .channels = ltc2632x12_channels, |
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| 217 | + .num_channels = 2, |
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207 | 218 | .vref_mv = 2500, |
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208 | 219 | }, |
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209 | 220 | [ID_LTC2632L10] = { |
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210 | | - .channels = ltc2632l10_channels, |
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| 221 | + .channels = ltc2632x10_channels, |
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| 222 | + .num_channels = 2, |
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211 | 223 | .vref_mv = 2500, |
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212 | 224 | }, |
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213 | 225 | [ID_LTC2632L8] = { |
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214 | | - .channels = ltc2632l8_channels, |
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| 226 | + .channels = ltc2632x8_channels, |
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| 227 | + .num_channels = 2, |
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215 | 228 | .vref_mv = 2500, |
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216 | 229 | }, |
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217 | 230 | [ID_LTC2632H12] = { |
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218 | | - .channels = ltc2632h12_channels, |
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| 231 | + .channels = ltc2632x12_channels, |
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| 232 | + .num_channels = 2, |
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219 | 233 | .vref_mv = 4096, |
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220 | 234 | }, |
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221 | 235 | [ID_LTC2632H10] = { |
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222 | | - .channels = ltc2632h10_channels, |
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| 236 | + .channels = ltc2632x10_channels, |
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| 237 | + .num_channels = 2, |
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223 | 238 | .vref_mv = 4096, |
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224 | 239 | }, |
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225 | 240 | [ID_LTC2632H8] = { |
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226 | | - .channels = ltc2632h8_channels, |
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| 241 | + .channels = ltc2632x8_channels, |
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| 242 | + .num_channels = 2, |
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| 243 | + .vref_mv = 4096, |
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| 244 | + }, |
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| 245 | + [ID_LTC2634L12] = { |
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| 246 | + .channels = ltc2632x12_channels, |
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| 247 | + .num_channels = 4, |
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| 248 | + .vref_mv = 2500, |
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| 249 | + }, |
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| 250 | + [ID_LTC2634L10] = { |
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| 251 | + .channels = ltc2632x10_channels, |
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| 252 | + .num_channels = 4, |
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| 253 | + .vref_mv = 2500, |
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| 254 | + }, |
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| 255 | + [ID_LTC2634L8] = { |
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| 256 | + .channels = ltc2632x8_channels, |
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| 257 | + .num_channels = 4, |
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| 258 | + .vref_mv = 2500, |
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| 259 | + }, |
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| 260 | + [ID_LTC2634H12] = { |
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| 261 | + .channels = ltc2632x12_channels, |
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| 262 | + .num_channels = 4, |
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| 263 | + .vref_mv = 4096, |
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| 264 | + }, |
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| 265 | + [ID_LTC2634H10] = { |
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| 266 | + .channels = ltc2632x10_channels, |
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| 267 | + .num_channels = 4, |
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| 268 | + .vref_mv = 4096, |
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| 269 | + }, |
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| 270 | + [ID_LTC2634H8] = { |
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| 271 | + .channels = ltc2632x8_channels, |
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| 272 | + .num_channels = 4, |
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| 273 | + .vref_mv = 4096, |
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| 274 | + }, |
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| 275 | + [ID_LTC2636L12] = { |
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| 276 | + .channels = ltc2632x12_channels, |
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| 277 | + .num_channels = 8, |
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| 278 | + .vref_mv = 2500, |
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| 279 | + }, |
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| 280 | + [ID_LTC2636L10] = { |
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| 281 | + .channels = ltc2632x10_channels, |
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| 282 | + .num_channels = 8, |
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| 283 | + .vref_mv = 2500, |
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| 284 | + }, |
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| 285 | + [ID_LTC2636L8] = { |
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| 286 | + .channels = ltc2632x8_channels, |
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| 287 | + .num_channels = 8, |
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| 288 | + .vref_mv = 2500, |
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| 289 | + }, |
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| 290 | + [ID_LTC2636H12] = { |
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| 291 | + .channels = ltc2632x12_channels, |
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| 292 | + .num_channels = 8, |
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| 293 | + .vref_mv = 4096, |
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| 294 | + }, |
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| 295 | + [ID_LTC2636H10] = { |
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| 296 | + .channels = ltc2632x10_channels, |
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| 297 | + .num_channels = 8, |
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| 298 | + .vref_mv = 4096, |
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| 299 | + }, |
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| 300 | + [ID_LTC2636H8] = { |
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| 301 | + .channels = ltc2632x8_channels, |
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| 302 | + .num_channels = 8, |
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227 | 303 | .vref_mv = 4096, |
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228 | 304 | }, |
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229 | 305 | }; |
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.. | .. |
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286 | 362 | } |
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287 | 363 | } |
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288 | 364 | |
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289 | | - indio_dev->dev.parent = &spi->dev; |
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290 | 365 | indio_dev->name = dev_of_node(&spi->dev) ? dev_of_node(&spi->dev)->name |
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291 | 366 | : spi_get_device_id(spi)->name; |
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292 | 367 | indio_dev->info = <c2632_info; |
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293 | 368 | indio_dev->modes = INDIO_DIRECT_MODE; |
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294 | 369 | indio_dev->channels = chip_info->channels; |
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295 | | - indio_dev->num_channels = LTC2632_DAC_CHANNELS; |
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| 370 | + indio_dev->num_channels = chip_info->num_channels; |
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296 | 371 | |
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297 | 372 | return iio_device_register(indio_dev); |
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298 | 373 | } |
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.. | .. |
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317 | 392 | { "ltc2632-h12", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2632H12] }, |
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318 | 393 | { "ltc2632-h10", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2632H10] }, |
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319 | 394 | { "ltc2632-h8", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2632H8] }, |
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| 395 | + { "ltc2634-l12", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2634L12] }, |
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| 396 | + { "ltc2634-l10", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2634L10] }, |
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| 397 | + { "ltc2634-l8", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2634L8] }, |
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| 398 | + { "ltc2634-h12", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2634H12] }, |
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| 399 | + { "ltc2634-h10", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2634H10] }, |
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| 400 | + { "ltc2634-h8", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2634H8] }, |
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| 401 | + { "ltc2636-l12", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2636L12] }, |
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| 402 | + { "ltc2636-l10", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2636L10] }, |
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| 403 | + { "ltc2636-l8", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2636L8] }, |
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| 404 | + { "ltc2636-h12", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2636H12] }, |
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| 405 | + { "ltc2636-h10", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2636H10] }, |
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| 406 | + { "ltc2636-h8", (kernel_ulong_t)<c2632_chip_info_tbl[ID_LTC2636H8] }, |
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320 | 407 | {} |
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321 | 408 | }; |
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322 | 409 | MODULE_DEVICE_TABLE(spi, ltc2632_id); |
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.. | .. |
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340 | 427 | }, { |
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341 | 428 | .compatible = "lltc,ltc2632-h8", |
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342 | 429 | .data = <c2632_chip_info_tbl[ID_LTC2632H8] |
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| 430 | + }, { |
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| 431 | + .compatible = "lltc,ltc2634-l12", |
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| 432 | + .data = <c2632_chip_info_tbl[ID_LTC2634L12] |
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| 433 | + }, { |
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| 434 | + .compatible = "lltc,ltc2634-l10", |
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| 435 | + .data = <c2632_chip_info_tbl[ID_LTC2634L10] |
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| 436 | + }, { |
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| 437 | + .compatible = "lltc,ltc2634-l8", |
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| 438 | + .data = <c2632_chip_info_tbl[ID_LTC2634L8] |
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| 439 | + }, { |
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| 440 | + .compatible = "lltc,ltc2634-h12", |
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| 441 | + .data = <c2632_chip_info_tbl[ID_LTC2634H12] |
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| 442 | + }, { |
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| 443 | + .compatible = "lltc,ltc2634-h10", |
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| 444 | + .data = <c2632_chip_info_tbl[ID_LTC2634H10] |
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| 445 | + }, { |
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| 446 | + .compatible = "lltc,ltc2634-h8", |
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| 447 | + .data = <c2632_chip_info_tbl[ID_LTC2634H8] |
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| 448 | + }, { |
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| 449 | + .compatible = "lltc,ltc2636-l12", |
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| 450 | + .data = <c2632_chip_info_tbl[ID_LTC2636L12] |
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| 451 | + }, { |
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| 452 | + .compatible = "lltc,ltc2636-l10", |
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| 453 | + .data = <c2632_chip_info_tbl[ID_LTC2636L10] |
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| 454 | + }, { |
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| 455 | + .compatible = "lltc,ltc2636-l8", |
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| 456 | + .data = <c2632_chip_info_tbl[ID_LTC2636L8] |
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| 457 | + }, { |
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| 458 | + .compatible = "lltc,ltc2636-h12", |
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| 459 | + .data = <c2632_chip_info_tbl[ID_LTC2636H12] |
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| 460 | + }, { |
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| 461 | + .compatible = "lltc,ltc2636-h10", |
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| 462 | + .data = <c2632_chip_info_tbl[ID_LTC2636H10] |
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| 463 | + }, { |
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| 464 | + .compatible = "lltc,ltc2636-h8", |
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| 465 | + .data = <c2632_chip_info_tbl[ID_LTC2636H8] |
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343 | 466 | }, |
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344 | 467 | {} |
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345 | 468 | }; |
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