Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 1 | /* |
| 2 | * I2C multiplexer |
| 3 | * |
| 4 | * Copyright (c) 2008-2009 Rodolfo Giometti <giometti@linux.it> |
| 5 | * Copyright (c) 2008-2009 Eurotech S.p.A. <info@eurotech.it> |
| 6 | * |
| 7 | * This module supports the PCA954x series of I2C multiplexer/switch chips |
| 8 | * made by Philips Semiconductors. |
| 9 | * This includes the: |
| 10 | * PCA9540, PCA9542, PCA9543, PCA9544, PCA9545, PCA9546, PCA9547 |
| 11 | * and PCA9548. |
| 12 | * |
| 13 | * These chips are all controlled via the I2C bus itself, and all have a |
| 14 | * single 8-bit register. The upstream "parent" bus fans out to two, |
| 15 | * four, or eight downstream busses or channels; which of these |
| 16 | * are selected is determined by the chip type and register contents. A |
| 17 | * mux can select only one sub-bus at a time; a switch can select any |
| 18 | * combination simultaneously. |
| 19 | * |
| 20 | * Based on: |
| 21 | * pca954x.c from Kumar Gala <galak@kernel.crashing.org> |
| 22 | * Copyright (C) 2006 |
| 23 | * |
| 24 | * Based on: |
| 25 | * pca954x.c from Ken Harrenstien |
| 26 | * Copyright (C) 2004 Google, Inc. (Ken Harrenstien) |
| 27 | * |
| 28 | * Based on: |
| 29 | * i2c-virtual_cb.c from Brian Kuschak <bkuschak@yahoo.com> |
| 30 | * and |
Jean Delvare | 7c81c60 | 2014-01-29 20:40:08 +0100 | [diff] [blame] | 31 | * pca9540.c from Jean Delvare <jdelvare@suse.de>. |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 32 | * |
| 33 | * This file is licensed under the terms of the GNU General Public |
| 34 | * License version 2. This program is licensed "as is" without any |
| 35 | * warranty of any kind, whether express or implied. |
| 36 | */ |
| 37 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 38 | #include <linux/device.h> |
Laurent Pinchart | 642653d | 2014-06-04 18:56:32 +0200 | [diff] [blame] | 39 | #include <linux/gpio/consumer.h> |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 40 | #include <linux/i2c.h> |
| 41 | #include <linux/i2c-mux.h> |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 42 | #include <linux/i2c/pca954x.h> |
Laurent Pinchart | 4b9b007 | 2013-11-29 01:51:22 +0100 | [diff] [blame] | 43 | #include <linux/module.h> |
Alexander Sverdlin | 72f0271 | 2015-01-23 16:41:29 +0100 | [diff] [blame] | 44 | #include <linux/of.h> |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 45 | #include <linux/of_device.h> |
Jisheng Zhang | f5e596c | 2014-07-25 19:57:46 +0800 | [diff] [blame] | 46 | #include <linux/pm.h> |
Laurent Pinchart | 4b9b007 | 2013-11-29 01:51:22 +0100 | [diff] [blame] | 47 | #include <linux/slab.h> |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 48 | |
| 49 | #define PCA954X_MAX_NCHANS 8 |
| 50 | |
| 51 | enum pca_type { |
| 52 | pca_9540, |
| 53 | pca_9542, |
| 54 | pca_9543, |
| 55 | pca_9544, |
| 56 | pca_9545, |
| 57 | pca_9546, |
| 58 | pca_9547, |
| 59 | pca_9548, |
| 60 | }; |
| 61 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 62 | struct chip_desc { |
| 63 | u8 nchans; |
| 64 | u8 enable; /* used for muxes only */ |
| 65 | enum muxtype { |
| 66 | pca954x_ismux = 0, |
| 67 | pca954x_isswi |
| 68 | } muxtype; |
| 69 | }; |
| 70 | |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 71 | struct pca954x { |
| 72 | const struct chip_desc *chip; |
| 73 | |
| 74 | u8 last_chan; /* last register value */ |
| 75 | u8 deselect; |
| 76 | struct i2c_client *client; |
| 77 | }; |
| 78 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 79 | /* Provide specs for the PCA954x types we know about */ |
| 80 | static const struct chip_desc chips[] = { |
| 81 | [pca_9540] = { |
| 82 | .nchans = 2, |
| 83 | .enable = 0x4, |
| 84 | .muxtype = pca954x_ismux, |
| 85 | }, |
| 86 | [pca_9543] = { |
| 87 | .nchans = 2, |
| 88 | .muxtype = pca954x_isswi, |
| 89 | }, |
| 90 | [pca_9544] = { |
| 91 | .nchans = 4, |
| 92 | .enable = 0x4, |
| 93 | .muxtype = pca954x_ismux, |
| 94 | }, |
| 95 | [pca_9545] = { |
| 96 | .nchans = 4, |
| 97 | .muxtype = pca954x_isswi, |
| 98 | }, |
| 99 | [pca_9547] = { |
| 100 | .nchans = 8, |
| 101 | .enable = 0x8, |
| 102 | .muxtype = pca954x_ismux, |
| 103 | }, |
| 104 | [pca_9548] = { |
| 105 | .nchans = 8, |
| 106 | .muxtype = pca954x_isswi, |
| 107 | }, |
| 108 | }; |
| 109 | |
| 110 | static const struct i2c_device_id pca954x_id[] = { |
| 111 | { "pca9540", pca_9540 }, |
| 112 | { "pca9542", pca_9540 }, |
| 113 | { "pca9543", pca_9543 }, |
| 114 | { "pca9544", pca_9544 }, |
| 115 | { "pca9545", pca_9545 }, |
| 116 | { "pca9546", pca_9545 }, |
| 117 | { "pca9547", pca_9547 }, |
| 118 | { "pca9548", pca_9548 }, |
| 119 | { } |
| 120 | }; |
| 121 | MODULE_DEVICE_TABLE(i2c, pca954x_id); |
| 122 | |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 123 | #ifdef CONFIG_OF |
| 124 | static const struct of_device_id pca954x_of_match[] = { |
| 125 | { .compatible = "nxp,pca9540", .data = &chips[pca_9540] }, |
| 126 | { .compatible = "nxp,pca9542", .data = &chips[pca_9542] }, |
| 127 | { .compatible = "nxp,pca9543", .data = &chips[pca_9543] }, |
| 128 | { .compatible = "nxp,pca9544", .data = &chips[pca_9544] }, |
| 129 | { .compatible = "nxp,pca9545", .data = &chips[pca_9545] }, |
| 130 | { .compatible = "nxp,pca9546", .data = &chips[pca_9546] }, |
| 131 | { .compatible = "nxp,pca9547", .data = &chips[pca_9547] }, |
| 132 | { .compatible = "nxp,pca9548", .data = &chips[pca_9548] }, |
| 133 | {} |
| 134 | }; |
| 135 | #endif |
| 136 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 137 | /* Write to mux register. Don't use i2c_transfer()/i2c_smbus_xfer() |
| 138 | for this as they will try to lock adapter a second time */ |
| 139 | static int pca954x_reg_write(struct i2c_adapter *adap, |
| 140 | struct i2c_client *client, u8 val) |
| 141 | { |
| 142 | int ret = -ENODEV; |
| 143 | |
| 144 | if (adap->algo->master_xfer) { |
| 145 | struct i2c_msg msg; |
| 146 | char buf[1]; |
| 147 | |
| 148 | msg.addr = client->addr; |
| 149 | msg.flags = 0; |
| 150 | msg.len = 1; |
| 151 | buf[0] = val; |
| 152 | msg.buf = buf; |
Alexander Sverdlin | 0a8237a | 2015-06-12 14:41:00 +0200 | [diff] [blame] | 153 | ret = __i2c_transfer(adap, &msg, 1); |
Russell King | 26eae20 | 2016-12-17 12:10:56 +0000 | [diff] [blame] | 154 | |
| 155 | if (ret >= 0 && ret != 1) |
| 156 | ret = -EREMOTEIO; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 157 | } else { |
| 158 | union i2c_smbus_data data; |
| 159 | ret = adap->algo->smbus_xfer(adap, client->addr, |
| 160 | client->flags, |
| 161 | I2C_SMBUS_WRITE, |
| 162 | val, I2C_SMBUS_BYTE, &data); |
| 163 | } |
| 164 | |
| 165 | return ret; |
| 166 | } |
| 167 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 168 | static int pca954x_select_chan(struct i2c_mux_core *muxc, u32 chan) |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 169 | { |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 170 | struct pca954x *data = i2c_mux_priv(muxc); |
| 171 | struct i2c_client *client = data->client; |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 172 | const struct chip_desc *chip = data->chip; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 173 | u8 regval; |
| 174 | int ret = 0; |
| 175 | |
| 176 | /* we make switches look like muxes, not sure how to be smarter */ |
| 177 | if (chip->muxtype == pca954x_ismux) |
| 178 | regval = chan | chip->enable; |
| 179 | else |
| 180 | regval = 1 << chan; |
| 181 | |
| 182 | /* Only select the channel if its different from the last channel */ |
| 183 | if (data->last_chan != regval) { |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 184 | ret = pca954x_reg_write(muxc->parent, client, regval); |
Russell King | 26eae20 | 2016-12-17 12:10:56 +0000 | [diff] [blame] | 185 | data->last_chan = ret < 0 ? 0 : regval; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | return ret; |
| 189 | } |
| 190 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 191 | static int pca954x_deselect_mux(struct i2c_mux_core *muxc, u32 chan) |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 192 | { |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 193 | struct pca954x *data = i2c_mux_priv(muxc); |
| 194 | struct i2c_client *client = data->client; |
| 195 | |
| 196 | if (!(data->deselect & (1 << chan))) |
| 197 | return 0; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 198 | |
| 199 | /* Deselect active channel */ |
| 200 | data->last_chan = 0; |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 201 | return pca954x_reg_write(muxc->parent, client, data->last_chan); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | /* |
| 205 | * I2C init/probing/exit functions |
| 206 | */ |
Guenter Roeck | db79f2a | 2010-10-24 18:16:59 +0200 | [diff] [blame] | 207 | static int pca954x_probe(struct i2c_client *client, |
| 208 | const struct i2c_device_id *id) |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 209 | { |
| 210 | struct i2c_adapter *adap = to_i2c_adapter(client->dev.parent); |
Jingoo Han | 6d4028c | 2013-07-30 16:59:33 +0900 | [diff] [blame] | 211 | struct pca954x_platform_data *pdata = dev_get_platdata(&client->dev); |
Alexander Sverdlin | 72f0271 | 2015-01-23 16:41:29 +0100 | [diff] [blame] | 212 | struct device_node *of_node = client->dev.of_node; |
| 213 | bool idle_disconnect_dt; |
Laurent Pinchart | 4807e84 | 2014-06-03 13:15:26 +0200 | [diff] [blame] | 214 | struct gpio_desc *gpio; |
Jean Delvare | eee543e | 2012-10-05 22:23:51 +0200 | [diff] [blame] | 215 | int num, force, class; |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 216 | struct i2c_mux_core *muxc; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 217 | struct pca954x *data; |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 218 | const struct of_device_id *match; |
Laurent Pinchart | bc12cfc | 2013-11-29 01:51:23 +0100 | [diff] [blame] | 219 | int ret; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 220 | |
| 221 | if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_BYTE)) |
Laurent Pinchart | bc12cfc | 2013-11-29 01:51:23 +0100 | [diff] [blame] | 222 | return -ENODEV; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 223 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 224 | muxc = i2c_mux_alloc(adap, &client->dev, |
| 225 | PCA954X_MAX_NCHANS, sizeof(*data), 0, |
| 226 | pca954x_select_chan, pca954x_deselect_mux); |
| 227 | if (!muxc) |
Laurent Pinchart | bc12cfc | 2013-11-29 01:51:23 +0100 | [diff] [blame] | 228 | return -ENOMEM; |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 229 | data = i2c_mux_priv(muxc); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 230 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 231 | i2c_set_clientdata(client, muxc); |
| 232 | data->client = client; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 233 | |
Laurent Pinchart | 4807e84 | 2014-06-03 13:15:26 +0200 | [diff] [blame] | 234 | /* Get the mux out of reset if a reset GPIO is specified. */ |
Uwe Kleine-König | 58b59e0 | 2015-02-17 10:12:08 +0100 | [diff] [blame] | 235 | gpio = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_LOW); |
| 236 | if (IS_ERR(gpio)) |
| 237 | return PTR_ERR(gpio); |
Laurent Pinchart | 1209795 | 2013-11-29 01:51:25 +0100 | [diff] [blame] | 238 | |
Petri Gynther | cd823db | 2011-06-29 11:36:11 +0200 | [diff] [blame] | 239 | /* Write the mux register at addr to verify |
| 240 | * that the mux is in fact present. This also |
| 241 | * initializes the mux to disconnected state. |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 242 | */ |
Petri Gynther | cd823db | 2011-06-29 11:36:11 +0200 | [diff] [blame] | 243 | if (i2c_smbus_write_byte(client, 0) < 0) { |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 244 | dev_warn(&client->dev, "probe failed\n"); |
Laurent Pinchart | bc12cfc | 2013-11-29 01:51:23 +0100 | [diff] [blame] | 245 | return -ENODEV; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 246 | } |
| 247 | |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 248 | match = of_match_device(of_match_ptr(pca954x_of_match), &client->dev); |
| 249 | if (match) |
| 250 | data->chip = of_device_get_match_data(&client->dev); |
| 251 | else |
| 252 | data->chip = &chips[id->driver_data]; |
| 253 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 254 | data->last_chan = 0; /* force the first selection */ |
| 255 | |
Alexander Sverdlin | 72f0271 | 2015-01-23 16:41:29 +0100 | [diff] [blame] | 256 | idle_disconnect_dt = of_node && |
| 257 | of_property_read_bool(of_node, "i2c-mux-idle-disconnect"); |
| 258 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 259 | /* Now create an adapter for each channel */ |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 260 | for (num = 0; num < data->chip->nchans; num++) { |
Alexander Sverdlin | 72f0271 | 2015-01-23 16:41:29 +0100 | [diff] [blame] | 261 | bool idle_disconnect_pd = false; |
| 262 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 263 | force = 0; /* dynamic adap number */ |
Jean Delvare | eee543e | 2012-10-05 22:23:51 +0200 | [diff] [blame] | 264 | class = 0; /* no class by default */ |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 265 | if (pdata) { |
Jean Delvare | eee543e | 2012-10-05 22:23:51 +0200 | [diff] [blame] | 266 | if (num < pdata->num_modes) { |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 267 | /* force static number */ |
| 268 | force = pdata->modes[num].adap_id; |
Jean Delvare | eee543e | 2012-10-05 22:23:51 +0200 | [diff] [blame] | 269 | class = pdata->modes[num].class; |
| 270 | } else |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 271 | /* discard unconfigured channels */ |
| 272 | break; |
Alexander Sverdlin | 72f0271 | 2015-01-23 16:41:29 +0100 | [diff] [blame] | 273 | idle_disconnect_pd = pdata->modes[num].deselect_on_exit; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 274 | } |
Alex Hemme | ad092de | 2016-11-19 10:48:38 +0100 | [diff] [blame] | 275 | data->deselect |= (idle_disconnect_pd || |
| 276 | idle_disconnect_dt) << num; |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 277 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 278 | ret = i2c_mux_add_adapter(muxc, force, num, class); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 279 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 280 | if (ret) { |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 281 | dev_err(&client->dev, |
| 282 | "failed to register multiplexed adapter" |
| 283 | " %d as bus %d\n", num, force); |
| 284 | goto virt_reg_failed; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | dev_info(&client->dev, |
| 289 | "registered %d multiplexed busses for I2C %s %s\n", |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 290 | num, data->chip->muxtype == pca954x_ismux |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 291 | ? "mux" : "switch", client->name); |
| 292 | |
| 293 | return 0; |
| 294 | |
| 295 | virt_reg_failed: |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 296 | i2c_mux_del_adapters(muxc); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 297 | return ret; |
| 298 | } |
| 299 | |
Guenter Roeck | db79f2a | 2010-10-24 18:16:59 +0200 | [diff] [blame] | 300 | static int pca954x_remove(struct i2c_client *client) |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 301 | { |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 302 | struct i2c_mux_core *muxc = i2c_get_clientdata(client); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 303 | |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 304 | i2c_mux_del_adapters(muxc); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 305 | return 0; |
| 306 | } |
| 307 | |
Jisheng Zhang | f5e596c | 2014-07-25 19:57:46 +0800 | [diff] [blame] | 308 | #ifdef CONFIG_PM_SLEEP |
| 309 | static int pca954x_resume(struct device *dev) |
| 310 | { |
| 311 | struct i2c_client *client = to_i2c_client(dev); |
Peter Rosin | 7fcac98 | 2016-04-20 08:40:14 +0200 | [diff] [blame] | 312 | struct i2c_mux_core *muxc = i2c_get_clientdata(client); |
| 313 | struct pca954x *data = i2c_mux_priv(muxc); |
Jisheng Zhang | f5e596c | 2014-07-25 19:57:46 +0800 | [diff] [blame] | 314 | |
| 315 | data->last_chan = 0; |
| 316 | return i2c_smbus_write_byte(client, 0); |
| 317 | } |
| 318 | #endif |
| 319 | |
| 320 | static SIMPLE_DEV_PM_OPS(pca954x_pm, NULL, pca954x_resume); |
| 321 | |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 322 | static struct i2c_driver pca954x_driver = { |
| 323 | .driver = { |
| 324 | .name = "pca954x", |
Jisheng Zhang | f5e596c | 2014-07-25 19:57:46 +0800 | [diff] [blame] | 325 | .pm = &pca954x_pm, |
Peter Rosin | 8a191a7 | 2016-07-09 21:21:15 +0200 | [diff] [blame] | 326 | .of_match_table = of_match_ptr(pca954x_of_match), |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 327 | }, |
| 328 | .probe = pca954x_probe, |
Guenter Roeck | db79f2a | 2010-10-24 18:16:59 +0200 | [diff] [blame] | 329 | .remove = pca954x_remove, |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 330 | .id_table = pca954x_id, |
| 331 | }; |
| 332 | |
Axel Lin | de05497 | 2012-03-26 21:47:19 +0200 | [diff] [blame] | 333 | module_i2c_driver(pca954x_driver); |
Michael Lawnick | 7f52813 | 2010-08-11 18:21:03 +0200 | [diff] [blame] | 334 | |
| 335 | MODULE_AUTHOR("Rodolfo Giometti <giometti@linux.it>"); |
| 336 | MODULE_DESCRIPTION("PCA954x I2C mux/switch driver"); |
| 337 | MODULE_LICENSE("GPL v2"); |