Input: rename cap1106 driver to cap11xx

+10 -9

Documentation/devicetree/bindings/input/cap1106.txt Documentation/devicetree/bindings/input/cap11xx.txt

··· 1 - Device tree bindings for Microchip CAP1106, 6 channel capacitive touch sensor 1 + Device tree bindings for Microchip CAP11xx based capacitive touch sensors 2 2 3 - The node for this driver must be a child of a I2C controller node, as the 3 + The node for this device must be a child of a I2C controller node, as the 4 4 device communication via I2C only. 5 5 6 6 Required properties: 7 7 8 - compatible: Must be "microchip,cap1106" 8 + compatible: Must contain one of: 9 + "microchip,cap1106" 9 10 10 11 reg: The I2C slave address of the device. 11 12 Only 0x28 is valid. ··· 44 43 autorepeat; 45 44 microchip,sensor-gain = <2>; 46 45 47 - linux,keycodes = <103 /* KEY_UP */ 48 - 106 /* KEY_RIGHT */ 49 - 108 /* KEY_DOWN */ 50 - 105 /* KEY_LEFT */ 51 - 109 /* KEY_PAGEDOWN */ 52 - 104>; /* KEY_PAGEUP */ 46 + linux,keycodes = <103>, /* KEY_UP */ 47 + <106>, /* KEY_RIGHT */ 48 + <108>, /* KEY_DOWN */ 49 + <105>, /* KEY_LEFT */ 50 + <109>, /* KEY_PAGEDOWN */ 51 + <104>; /* KEY_PAGEUP */ 53 52 }; 54 53 }

+4 -4

drivers/input/keyboard/Kconfig

··· 665 665 To compile this driver as a module, choose M here: the 666 666 module will be called cros_ec_keyb. 667 667 668 - config KEYBOARD_CAP1106 669 - tristate "Microchip CAP1106 touch sensor" 668 + config KEYBOARD_CAP11XX 669 + tristate "Microchip CAP11XX based touch sensors" 670 670 depends on OF && I2C 671 671 select REGMAP_I2C 672 672 help 673 - Say Y here to enable the CAP1106 touch sensor driver. 673 + Say Y here to enable the CAP11XX touch sensor driver. 674 674 675 675 To compile this driver as a module, choose M here: the 676 - module will be called cap1106. 676 + module will be called cap11xx. 677 677 678 678 endif

+1 -1

drivers/input/keyboard/Makefile

··· 11 11 obj-$(CONFIG_KEYBOARD_ATARI) += atakbd.o 12 12 obj-$(CONFIG_KEYBOARD_ATKBD) += atkbd.o 13 13 obj-$(CONFIG_KEYBOARD_BFIN) += bf54x-keys.o 14 - obj-$(CONFIG_KEYBOARD_CAP1106) += cap1106.o 14 + obj-$(CONFIG_KEYBOARD_CAP11XX) += cap11xx.o 15 15 obj-$(CONFIG_KEYBOARD_CLPS711X) += clps711x-keypad.o 16 16 obj-$(CONFIG_KEYBOARD_CROS_EC) += cros_ec_keyb.o 17 17 obj-$(CONFIG_KEYBOARD_DAVINCI) += davinci_keyscan.o

-341

drivers/input/keyboard/cap1106.c

··· 1 - /* 2 - * Input driver for Microchip CAP1106, 6 channel capacitive touch sensor 3 - * 4 - * http://www.microchip.com/wwwproducts/Devices.aspx?product=CAP1106 5 - * 6 - * (c) 2014 Daniel Mack <linux@zonque.org> 7 - * 8 - * This program is free software; you can redistribute it and/or modify 9 - * it under the terms of the GNU General Public License version 2 as 10 - * published by the Free Software Foundation. 11 - */ 12 - 13 - #include <linux/kernel.h> 14 - #include <linux/module.h> 15 - #include <linux/interrupt.h> 16 - #include <linux/input.h> 17 - #include <linux/of_irq.h> 18 - #include <linux/regmap.h> 19 - #include <linux/i2c.h> 20 - #include <linux/gpio/consumer.h> 21 - 22 - #define CAP1106_REG_MAIN_CONTROL 0x00 23 - #define CAP1106_REG_MAIN_CONTROL_GAIN_SHIFT (6) 24 - #define CAP1106_REG_MAIN_CONTROL_GAIN_MASK (0xc0) 25 - #define CAP1106_REG_MAIN_CONTROL_DLSEEP BIT(4) 26 - #define CAP1106_REG_GENERAL_STATUS 0x02 27 - #define CAP1106_REG_SENSOR_INPUT 0x03 28 - #define CAP1106_REG_NOISE_FLAG_STATUS 0x0a 29 - #define CAP1106_REG_SENOR_DELTA(X) (0x10 + (X)) 30 - #define CAP1106_REG_SENSITIVITY_CONTROL 0x1f 31 - #define CAP1106_REG_CONFIG 0x20 32 - #define CAP1106_REG_SENSOR_ENABLE 0x21 33 - #define CAP1106_REG_SENSOR_CONFIG 0x22 34 - #define CAP1106_REG_SENSOR_CONFIG2 0x23 35 - #define CAP1106_REG_SAMPLING_CONFIG 0x24 36 - #define CAP1106_REG_CALIBRATION 0x26 37 - #define CAP1106_REG_INT_ENABLE 0x27 38 - #define CAP1106_REG_REPEAT_RATE 0x28 39 - #define CAP1106_REG_MT_CONFIG 0x2a 40 - #define CAP1106_REG_MT_PATTERN_CONFIG 0x2b 41 - #define CAP1106_REG_MT_PATTERN 0x2d 42 - #define CAP1106_REG_RECALIB_CONFIG 0x2f 43 - #define CAP1106_REG_SENSOR_THRESH(X) (0x30 + (X)) 44 - #define CAP1106_REG_SENSOR_NOISE_THRESH 0x38 45 - #define CAP1106_REG_STANDBY_CHANNEL 0x40 46 - #define CAP1106_REG_STANDBY_CONFIG 0x41 47 - #define CAP1106_REG_STANDBY_SENSITIVITY 0x42 48 - #define CAP1106_REG_STANDBY_THRESH 0x43 49 - #define CAP1106_REG_CONFIG2 0x44 50 - #define CAP1106_REG_SENSOR_BASE_CNT(X) (0x50 + (X)) 51 - #define CAP1106_REG_SENSOR_CALIB (0xb1 + (X)) 52 - #define CAP1106_REG_SENSOR_CALIB_LSB1 0xb9 53 - #define CAP1106_REG_SENSOR_CALIB_LSB2 0xba 54 - #define CAP1106_REG_PRODUCT_ID 0xfd 55 - #define CAP1106_REG_MANUFACTURER_ID 0xfe 56 - #define CAP1106_REG_REVISION 0xff 57 - 58 - #define CAP1106_NUM_CHN 6 59 - #define CAP1106_PRODUCT_ID 0x55 60 - #define CAP1106_MANUFACTURER_ID 0x5d 61 - 62 - struct cap1106_priv { 63 - struct regmap *regmap; 64 - struct input_dev *idev; 65 - 66 - /* config */ 67 - unsigned short keycodes[CAP1106_NUM_CHN]; 68 - }; 69 - 70 - static const struct reg_default cap1106_reg_defaults[] = { 71 - { CAP1106_REG_MAIN_CONTROL, 0x00 }, 72 - { CAP1106_REG_GENERAL_STATUS, 0x00 }, 73 - { CAP1106_REG_SENSOR_INPUT, 0x00 }, 74 - { CAP1106_REG_NOISE_FLAG_STATUS, 0x00 }, 75 - { CAP1106_REG_SENSITIVITY_CONTROL, 0x2f }, 76 - { CAP1106_REG_CONFIG, 0x20 }, 77 - { CAP1106_REG_SENSOR_ENABLE, 0x3f }, 78 - { CAP1106_REG_SENSOR_CONFIG, 0xa4 }, 79 - { CAP1106_REG_SENSOR_CONFIG2, 0x07 }, 80 - { CAP1106_REG_SAMPLING_CONFIG, 0x39 }, 81 - { CAP1106_REG_CALIBRATION, 0x00 }, 82 - { CAP1106_REG_INT_ENABLE, 0x3f }, 83 - { CAP1106_REG_REPEAT_RATE, 0x3f }, 84 - { CAP1106_REG_MT_CONFIG, 0x80 }, 85 - { CAP1106_REG_MT_PATTERN_CONFIG, 0x00 }, 86 - { CAP1106_REG_MT_PATTERN, 0x3f }, 87 - { CAP1106_REG_RECALIB_CONFIG, 0x8a }, 88 - { CAP1106_REG_SENSOR_THRESH(0), 0x40 }, 89 - { CAP1106_REG_SENSOR_THRESH(1), 0x40 }, 90 - { CAP1106_REG_SENSOR_THRESH(2), 0x40 }, 91 - { CAP1106_REG_SENSOR_THRESH(3), 0x40 }, 92 - { CAP1106_REG_SENSOR_THRESH(4), 0x40 }, 93 - { CAP1106_REG_SENSOR_THRESH(5), 0x40 }, 94 - { CAP1106_REG_SENSOR_NOISE_THRESH, 0x01 }, 95 - { CAP1106_REG_STANDBY_CHANNEL, 0x00 }, 96 - { CAP1106_REG_STANDBY_CONFIG, 0x39 }, 97 - { CAP1106_REG_STANDBY_SENSITIVITY, 0x02 }, 98 - { CAP1106_REG_STANDBY_THRESH, 0x40 }, 99 - { CAP1106_REG_CONFIG2, 0x40 }, 100 - { CAP1106_REG_SENSOR_CALIB_LSB1, 0x00 }, 101 - { CAP1106_REG_SENSOR_CALIB_LSB2, 0x00 }, 102 - }; 103 - 104 - static bool cap1106_volatile_reg(struct device *dev, unsigned int reg) 105 - { 106 - switch (reg) { 107 - case CAP1106_REG_MAIN_CONTROL: 108 - case CAP1106_REG_SENSOR_INPUT: 109 - case CAP1106_REG_SENOR_DELTA(0): 110 - case CAP1106_REG_SENOR_DELTA(1): 111 - case CAP1106_REG_SENOR_DELTA(2): 112 - case CAP1106_REG_SENOR_DELTA(3): 113 - case CAP1106_REG_SENOR_DELTA(4): 114 - case CAP1106_REG_SENOR_DELTA(5): 115 - case CAP1106_REG_PRODUCT_ID: 116 - case CAP1106_REG_MANUFACTURER_ID: 117 - case CAP1106_REG_REVISION: 118 - return true; 119 - } 120 - 121 - return false; 122 - } 123 - 124 - static const struct regmap_config cap1106_regmap_config = { 125 - .reg_bits = 8, 126 - .val_bits = 8, 127 - 128 - .max_register = CAP1106_REG_REVISION, 129 - .reg_defaults = cap1106_reg_defaults, 130 - 131 - .num_reg_defaults = ARRAY_SIZE(cap1106_reg_defaults), 132 - .cache_type = REGCACHE_RBTREE, 133 - .volatile_reg = cap1106_volatile_reg, 134 - }; 135 - 136 - static irqreturn_t cap1106_thread_func(int irq_num, void *data) 137 - { 138 - struct cap1106_priv *priv = data; 139 - unsigned int status; 140 - int ret, i; 141 - 142 - /* 143 - * Deassert interrupt. This needs to be done before reading the status 144 - * registers, which will not carry valid values otherwise. 145 - */ 146 - ret = regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL, 1, 0); 147 - if (ret < 0) 148 - goto out; 149 - 150 - ret = regmap_read(priv->regmap, CAP1106_REG_SENSOR_INPUT, &status); 151 - if (ret < 0) 152 - goto out; 153 - 154 - for (i = 0; i < CAP1106_NUM_CHN; i++) 155 - input_report_key(priv->idev, priv->keycodes[i], 156 - status & (1 << i)); 157 - 158 - input_sync(priv->idev); 159 - 160 - out: 161 - return IRQ_HANDLED; 162 - } 163 - 164 - static int cap1106_set_sleep(struct cap1106_priv *priv, bool sleep) 165 - { 166 - return regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL, 167 - CAP1106_REG_MAIN_CONTROL_DLSEEP, 168 - sleep ? CAP1106_REG_MAIN_CONTROL_DLSEEP : 0); 169 - } 170 - 171 - static int cap1106_input_open(struct input_dev *idev) 172 - { 173 - struct cap1106_priv *priv = input_get_drvdata(idev); 174 - 175 - return cap1106_set_sleep(priv, false); 176 - } 177 - 178 - static void cap1106_input_close(struct input_dev *idev) 179 - { 180 - struct cap1106_priv *priv = input_get_drvdata(idev); 181 - 182 - cap1106_set_sleep(priv, true); 183 - } 184 - 185 - static int cap1106_i2c_probe(struct i2c_client *i2c_client, 186 - const struct i2c_device_id *id) 187 - { 188 - struct device *dev = &i2c_client->dev; 189 - struct cap1106_priv *priv; 190 - struct device_node *node; 191 - int i, error, irq, gain = 0; 192 - unsigned int val, rev; 193 - u32 gain32, keycodes[CAP1106_NUM_CHN]; 194 - 195 - priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 196 - if (!priv) 197 - return -ENOMEM; 198 - 199 - priv->regmap = devm_regmap_init_i2c(i2c_client, &cap1106_regmap_config); 200 - if (IS_ERR(priv->regmap)) 201 - return PTR_ERR(priv->regmap); 202 - 203 - error = regmap_read(priv->regmap, CAP1106_REG_PRODUCT_ID, &val); 204 - if (error) 205 - return error; 206 - 207 - if (val != CAP1106_PRODUCT_ID) { 208 - dev_err(dev, "Product ID: Got 0x%02x, expected 0x%02x\n", 209 - val, CAP1106_PRODUCT_ID); 210 - return -ENODEV; 211 - } 212 - 213 - error = regmap_read(priv->regmap, CAP1106_REG_MANUFACTURER_ID, &val); 214 - if (error) 215 - return error; 216 - 217 - if (val != CAP1106_MANUFACTURER_ID) { 218 - dev_err(dev, "Manufacturer ID: Got 0x%02x, expected 0x%02x\n", 219 - val, CAP1106_MANUFACTURER_ID); 220 - return -ENODEV; 221 - } 222 - 223 - error = regmap_read(priv->regmap, CAP1106_REG_REVISION, &rev); 224 - if (error < 0) 225 - return error; 226 - 227 - dev_info(dev, "CAP1106 detected, revision 0x%02x\n", rev); 228 - i2c_set_clientdata(i2c_client, priv); 229 - node = dev->of_node; 230 - 231 - if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) { 232 - if (is_power_of_2(gain32) && gain32 <= 8) 233 - gain = ilog2(gain32); 234 - else 235 - dev_err(dev, "Invalid sensor-gain value %d\n", gain32); 236 - } 237 - 238 - BUILD_BUG_ON(ARRAY_SIZE(keycodes) != ARRAY_SIZE(priv->keycodes)); 239 - 240 - /* Provide some useful defaults */ 241 - for (i = 0; i < ARRAY_SIZE(keycodes); i++) 242 - keycodes[i] = KEY_A + i; 243 - 244 - of_property_read_u32_array(node, "linux,keycodes", 245 - keycodes, ARRAY_SIZE(keycodes)); 246 - 247 - for (i = 0; i < ARRAY_SIZE(keycodes); i++) 248 - priv->keycodes[i] = keycodes[i]; 249 - 250 - error = regmap_update_bits(priv->regmap, CAP1106_REG_MAIN_CONTROL, 251 - CAP1106_REG_MAIN_CONTROL_GAIN_MASK, 252 - gain << CAP1106_REG_MAIN_CONTROL_GAIN_SHIFT); 253 - if (error) 254 - return error; 255 - 256 - /* Disable autorepeat. The Linux input system has its own handling. */ 257 - error = regmap_write(priv->regmap, CAP1106_REG_REPEAT_RATE, 0); 258 - if (error) 259 - return error; 260 - 261 - priv->idev = devm_input_allocate_device(dev); 262 - if (!priv->idev) 263 - return -ENOMEM; 264 - 265 - priv->idev->name = "CAP1106 capacitive touch sensor"; 266 - priv->idev->id.bustype = BUS_I2C; 267 - priv->idev->evbit[0] = BIT_MASK(EV_KEY); 268 - 269 - if (of_property_read_bool(node, "autorepeat")) 270 - __set_bit(EV_REP, priv->idev->evbit); 271 - 272 - for (i = 0; i < CAP1106_NUM_CHN; i++) 273 - __set_bit(priv->keycodes[i], priv->idev->keybit); 274 - 275 - __clear_bit(KEY_RESERVED, priv->idev->keybit); 276 - 277 - priv->idev->keycode = priv->keycodes; 278 - priv->idev->keycodesize = sizeof(priv->keycodes[0]); 279 - priv->idev->keycodemax = ARRAY_SIZE(priv->keycodes); 280 - 281 - priv->idev->id.vendor = CAP1106_MANUFACTURER_ID; 282 - priv->idev->id.product = CAP1106_PRODUCT_ID; 283 - priv->idev->id.version = rev; 284 - 285 - priv->idev->open = cap1106_input_open; 286 - priv->idev->close = cap1106_input_close; 287 - 288 - input_set_drvdata(priv->idev, priv); 289 - 290 - /* 291 - * Put the device in deep sleep mode for now. 292 - * ->open() will bring it back once the it is actually needed. 293 - */ 294 - cap1106_set_sleep(priv, true); 295 - 296 - error = input_register_device(priv->idev); 297 - if (error) 298 - return error; 299 - 300 - irq = irq_of_parse_and_map(node, 0); 301 - if (!irq) { 302 - dev_err(dev, "Unable to parse or map IRQ\n"); 303 - return -ENXIO; 304 - } 305 - 306 - error = devm_request_threaded_irq(dev, irq, NULL, cap1106_thread_func, 307 - IRQF_ONESHOT, dev_name(dev), priv); 308 - if (error) 309 - return error; 310 - 311 - return 0; 312 - } 313 - 314 - static const struct of_device_id cap1106_dt_ids[] = { 315 - { .compatible = "microchip,cap1106", }, 316 - {} 317 - }; 318 - MODULE_DEVICE_TABLE(of, cap1106_dt_ids); 319 - 320 - static const struct i2c_device_id cap1106_i2c_ids[] = { 321 - { "cap1106", 0 }, 322 - {} 323 - }; 324 - MODULE_DEVICE_TABLE(i2c, cap1106_i2c_ids); 325 - 326 - static struct i2c_driver cap1106_i2c_driver = { 327 - .driver = { 328 - .name = "cap1106", 329 - .owner = THIS_MODULE, 330 - .of_match_table = cap1106_dt_ids, 331 - }, 332 - .id_table = cap1106_i2c_ids, 333 - .probe = cap1106_i2c_probe, 334 - }; 335 - 336 - module_i2c_driver(cap1106_i2c_driver); 337 - 338 - MODULE_ALIAS("platform:cap1106"); 339 - MODULE_DESCRIPTION("Microchip CAP1106 driver"); 340 - MODULE_AUTHOR("Daniel Mack <linux@zonque.org>"); 341 - MODULE_LICENSE("GPL v2");

+340

drivers/input/keyboard/cap11xx.c

··· 1 + /* 2 + * Input driver for Microchip CAP11xx based capacitive touch sensors 3 + * 4 + * 5 + * (c) 2014 Daniel Mack <linux@zonque.org> 6 + * 7 + * This program is free software; you can redistribute it and/or modify 8 + * it under the terms of the GNU General Public License version 2 as 9 + * published by the Free Software Foundation. 10 + */ 11 + 12 + #include <linux/kernel.h> 13 + #include <linux/module.h> 14 + #include <linux/interrupt.h> 15 + #include <linux/input.h> 16 + #include <linux/of_irq.h> 17 + #include <linux/regmap.h> 18 + #include <linux/i2c.h> 19 + #include <linux/gpio/consumer.h> 20 + 21 + #define CAP11XX_REG_MAIN_CONTROL 0x00 22 + #define CAP11XX_REG_MAIN_CONTROL_GAIN_SHIFT (6) 23 + #define CAP11XX_REG_MAIN_CONTROL_GAIN_MASK (0xc0) 24 + #define CAP11XX_REG_MAIN_CONTROL_DLSEEP BIT(4) 25 + #define CAP11XX_REG_GENERAL_STATUS 0x02 26 + #define CAP11XX_REG_SENSOR_INPUT 0x03 27 + #define CAP11XX_REG_NOISE_FLAG_STATUS 0x0a 28 + #define CAP11XX_REG_SENOR_DELTA(X) (0x10 + (X)) 29 + #define CAP11XX_REG_SENSITIVITY_CONTROL 0x1f 30 + #define CAP11XX_REG_CONFIG 0x20 31 + #define CAP11XX_REG_SENSOR_ENABLE 0x21 32 + #define CAP11XX_REG_SENSOR_CONFIG 0x22 33 + #define CAP11XX_REG_SENSOR_CONFIG2 0x23 34 + #define CAP11XX_REG_SAMPLING_CONFIG 0x24 35 + #define CAP11XX_REG_CALIBRATION 0x26 36 + #define CAP11XX_REG_INT_ENABLE 0x27 37 + #define CAP11XX_REG_REPEAT_RATE 0x28 38 + #define CAP11XX_REG_MT_CONFIG 0x2a 39 + #define CAP11XX_REG_MT_PATTERN_CONFIG 0x2b 40 + #define CAP11XX_REG_MT_PATTERN 0x2d 41 + #define CAP11XX_REG_RECALIB_CONFIG 0x2f 42 + #define CAP11XX_REG_SENSOR_THRESH(X) (0x30 + (X)) 43 + #define CAP11XX_REG_SENSOR_NOISE_THRESH 0x38 44 + #define CAP11XX_REG_STANDBY_CHANNEL 0x40 45 + #define CAP11XX_REG_STANDBY_CONFIG 0x41 46 + #define CAP11XX_REG_STANDBY_SENSITIVITY 0x42 47 + #define CAP11XX_REG_STANDBY_THRESH 0x43 48 + #define CAP11XX_REG_CONFIG2 0x44 49 + #define CAP11XX_REG_SENSOR_BASE_CNT(X) (0x50 + (X)) 50 + #define CAP11XX_REG_SENSOR_CALIB (0xb1 + (X)) 51 + #define CAP11XX_REG_SENSOR_CALIB_LSB1 0xb9 52 + #define CAP11XX_REG_SENSOR_CALIB_LSB2 0xba 53 + #define CAP11XX_REG_PRODUCT_ID 0xfd 54 + #define CAP11XX_REG_MANUFACTURER_ID 0xfe 55 + #define CAP11XX_REG_REVISION 0xff 56 + 57 + #define CAP11XX_NUM_CHN 6 58 + #define CAP11XX_PRODUCT_ID 0x55 59 + #define CAP11XX_MANUFACTURER_ID 0x5d 60 + 61 + struct cap11xx_priv { 62 + struct regmap *regmap; 63 + struct input_dev *idev; 64 + 65 + /* config */ 66 + unsigned short keycodes[CAP11XX_NUM_CHN]; 67 + }; 68 + 69 + static const struct reg_default cap11xx_reg_defaults[] = { 70 + { CAP11XX_REG_MAIN_CONTROL, 0x00 }, 71 + { CAP11XX_REG_GENERAL_STATUS, 0x00 }, 72 + { CAP11XX_REG_SENSOR_INPUT, 0x00 }, 73 + { CAP11XX_REG_NOISE_FLAG_STATUS, 0x00 }, 74 + { CAP11XX_REG_SENSITIVITY_CONTROL, 0x2f }, 75 + { CAP11XX_REG_CONFIG, 0x20 }, 76 + { CAP11XX_REG_SENSOR_ENABLE, 0x3f }, 77 + { CAP11XX_REG_SENSOR_CONFIG, 0xa4 }, 78 + { CAP11XX_REG_SENSOR_CONFIG2, 0x07 }, 79 + { CAP11XX_REG_SAMPLING_CONFIG, 0x39 }, 80 + { CAP11XX_REG_CALIBRATION, 0x00 }, 81 + { CAP11XX_REG_INT_ENABLE, 0x3f }, 82 + { CAP11XX_REG_REPEAT_RATE, 0x3f }, 83 + { CAP11XX_REG_MT_CONFIG, 0x80 }, 84 + { CAP11XX_REG_MT_PATTERN_CONFIG, 0x00 }, 85 + { CAP11XX_REG_MT_PATTERN, 0x3f }, 86 + { CAP11XX_REG_RECALIB_CONFIG, 0x8a }, 87 + { CAP11XX_REG_SENSOR_THRESH(0), 0x40 }, 88 + { CAP11XX_REG_SENSOR_THRESH(1), 0x40 }, 89 + { CAP11XX_REG_SENSOR_THRESH(2), 0x40 }, 90 + { CAP11XX_REG_SENSOR_THRESH(3), 0x40 }, 91 + { CAP11XX_REG_SENSOR_THRESH(4), 0x40 }, 92 + { CAP11XX_REG_SENSOR_THRESH(5), 0x40 }, 93 + { CAP11XX_REG_SENSOR_NOISE_THRESH, 0x01 }, 94 + { CAP11XX_REG_STANDBY_CHANNEL, 0x00 }, 95 + { CAP11XX_REG_STANDBY_CONFIG, 0x39 }, 96 + { CAP11XX_REG_STANDBY_SENSITIVITY, 0x02 }, 97 + { CAP11XX_REG_STANDBY_THRESH, 0x40 }, 98 + { CAP11XX_REG_CONFIG2, 0x40 }, 99 + { CAP11XX_REG_SENSOR_CALIB_LSB1, 0x00 }, 100 + { CAP11XX_REG_SENSOR_CALIB_LSB2, 0x00 }, 101 + }; 102 + 103 + static bool cap11xx_volatile_reg(struct device *dev, unsigned int reg) 104 + { 105 + switch (reg) { 106 + case CAP11XX_REG_MAIN_CONTROL: 107 + case CAP11XX_REG_SENSOR_INPUT: 108 + case CAP11XX_REG_SENOR_DELTA(0): 109 + case CAP11XX_REG_SENOR_DELTA(1): 110 + case CAP11XX_REG_SENOR_DELTA(2): 111 + case CAP11XX_REG_SENOR_DELTA(3): 112 + case CAP11XX_REG_SENOR_DELTA(4): 113 + case CAP11XX_REG_SENOR_DELTA(5): 114 + case CAP11XX_REG_PRODUCT_ID: 115 + case CAP11XX_REG_MANUFACTURER_ID: 116 + case CAP11XX_REG_REVISION: 117 + return true; 118 + } 119 + 120 + return false; 121 + } 122 + 123 + static const struct regmap_config cap11xx_regmap_config = { 124 + .reg_bits = 8, 125 + .val_bits = 8, 126 + 127 + .max_register = CAP11XX_REG_REVISION, 128 + .reg_defaults = cap11xx_reg_defaults, 129 + 130 + .num_reg_defaults = ARRAY_SIZE(cap11xx_reg_defaults), 131 + .cache_type = REGCACHE_RBTREE, 132 + .volatile_reg = cap11xx_volatile_reg, 133 + }; 134 + 135 + static irqreturn_t cap11xx_thread_func(int irq_num, void *data) 136 + { 137 + struct cap11xx_priv *priv = data; 138 + unsigned int status; 139 + int ret, i; 140 + 141 + /* 142 + * Deassert interrupt. This needs to be done before reading the status 143 + * registers, which will not carry valid values otherwise. 144 + */ 145 + ret = regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL, 1, 0); 146 + if (ret < 0) 147 + goto out; 148 + 149 + ret = regmap_read(priv->regmap, CAP11XX_REG_SENSOR_INPUT, &status); 150 + if (ret < 0) 151 + goto out; 152 + 153 + for (i = 0; i < CAP11XX_NUM_CHN; i++) 154 + input_report_key(priv->idev, priv->keycodes[i], 155 + status & (1 << i)); 156 + 157 + input_sync(priv->idev); 158 + 159 + out: 160 + return IRQ_HANDLED; 161 + } 162 + 163 + static int cap11xx_set_sleep(struct cap11xx_priv *priv, bool sleep) 164 + { 165 + return regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL, 166 + CAP11XX_REG_MAIN_CONTROL_DLSEEP, 167 + sleep ? CAP11XX_REG_MAIN_CONTROL_DLSEEP : 0); 168 + } 169 + 170 + static int cap11xx_input_open(struct input_dev *idev) 171 + { 172 + struct cap11xx_priv *priv = input_get_drvdata(idev); 173 + 174 + return cap11xx_set_sleep(priv, false); 175 + } 176 + 177 + static void cap11xx_input_close(struct input_dev *idev) 178 + { 179 + struct cap11xx_priv *priv = input_get_drvdata(idev); 180 + 181 + cap11xx_set_sleep(priv, true); 182 + } 183 + 184 + static int cap11xx_i2c_probe(struct i2c_client *i2c_client, 185 + const struct i2c_device_id *id) 186 + { 187 + struct device *dev = &i2c_client->dev; 188 + struct cap11xx_priv *priv; 189 + struct device_node *node; 190 + int i, error, irq, gain = 0; 191 + unsigned int val, rev; 192 + u32 gain32, keycodes[CAP11XX_NUM_CHN]; 193 + 194 + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 195 + if (!priv) 196 + return -ENOMEM; 197 + 198 + priv->regmap = devm_regmap_init_i2c(i2c_client, &cap11xx_regmap_config); 199 + if (IS_ERR(priv->regmap)) 200 + return PTR_ERR(priv->regmap); 201 + 202 + error = regmap_read(priv->regmap, CAP11XX_REG_PRODUCT_ID, &val); 203 + if (error) 204 + return error; 205 + 206 + if (val != CAP11XX_PRODUCT_ID) { 207 + dev_err(dev, "Product ID: Got 0x%02x, expected 0x%02x\n", 208 + val, CAP11XX_PRODUCT_ID); 209 + return -ENODEV; 210 + } 211 + 212 + error = regmap_read(priv->regmap, CAP11XX_REG_MANUFACTURER_ID, &val); 213 + if (error) 214 + return error; 215 + 216 + if (val != CAP11XX_MANUFACTURER_ID) { 217 + dev_err(dev, "Manufacturer ID: Got 0x%02x, expected 0x%02x\n", 218 + val, CAP11XX_MANUFACTURER_ID); 219 + return -ENODEV; 220 + } 221 + 222 + error = regmap_read(priv->regmap, CAP11XX_REG_REVISION, &rev); 223 + if (error < 0) 224 + return error; 225 + 226 + dev_info(dev, "CAP11XX detected, revision 0x%02x\n", rev); 227 + i2c_set_clientdata(i2c_client, priv); 228 + node = dev->of_node; 229 + 230 + if (!of_property_read_u32(node, "microchip,sensor-gain", &gain32)) { 231 + if (is_power_of_2(gain32) && gain32 <= 8) 232 + gain = ilog2(gain32); 233 + else 234 + dev_err(dev, "Invalid sensor-gain value %d\n", gain32); 235 + } 236 + 237 + BUILD_BUG_ON(ARRAY_SIZE(keycodes) != ARRAY_SIZE(priv->keycodes)); 238 + 239 + /* Provide some useful defaults */ 240 + for (i = 0; i < ARRAY_SIZE(keycodes); i++) 241 + keycodes[i] = KEY_A + i; 242 + 243 + of_property_read_u32_array(node, "linux,keycodes", 244 + keycodes, ARRAY_SIZE(keycodes)); 245 + 246 + for (i = 0; i < ARRAY_SIZE(keycodes); i++) 247 + priv->keycodes[i] = keycodes[i]; 248 + 249 + error = regmap_update_bits(priv->regmap, CAP11XX_REG_MAIN_CONTROL, 250 + CAP11XX_REG_MAIN_CONTROL_GAIN_MASK, 251 + gain << CAP11XX_REG_MAIN_CONTROL_GAIN_SHIFT); 252 + if (error) 253 + return error; 254 + 255 + /* Disable autorepeat. The Linux input system has its own handling. */ 256 + error = regmap_write(priv->regmap, CAP11XX_REG_REPEAT_RATE, 0); 257 + if (error) 258 + return error; 259 + 260 + priv->idev = devm_input_allocate_device(dev); 261 + if (!priv->idev) 262 + return -ENOMEM; 263 + 264 + priv->idev->name = "CAP11XX capacitive touch sensor"; 265 + priv->idev->id.bustype = BUS_I2C; 266 + priv->idev->evbit[0] = BIT_MASK(EV_KEY); 267 + 268 + if (of_property_read_bool(node, "autorepeat")) 269 + __set_bit(EV_REP, priv->idev->evbit); 270 + 271 + for (i = 0; i < CAP11XX_NUM_CHN; i++) 272 + __set_bit(priv->keycodes[i], priv->idev->keybit); 273 + 274 + __clear_bit(KEY_RESERVED, priv->idev->keybit); 275 + 276 + priv->idev->keycode = priv->keycodes; 277 + priv->idev->keycodesize = sizeof(priv->keycodes[0]); 278 + priv->idev->keycodemax = ARRAY_SIZE(priv->keycodes); 279 + 280 + priv->idev->id.vendor = CAP11XX_MANUFACTURER_ID; 281 + priv->idev->id.product = CAP11XX_PRODUCT_ID; 282 + priv->idev->id.version = rev; 283 + 284 + priv->idev->open = cap11xx_input_open; 285 + priv->idev->close = cap11xx_input_close; 286 + 287 + input_set_drvdata(priv->idev, priv); 288 + 289 + /* 290 + * Put the device in deep sleep mode for now. 291 + * ->open() will bring it back once the it is actually needed. 292 + */ 293 + cap11xx_set_sleep(priv, true); 294 + 295 + error = input_register_device(priv->idev); 296 + if (error) 297 + return error; 298 + 299 + irq = irq_of_parse_and_map(node, 0); 300 + if (!irq) { 301 + dev_err(dev, "Unable to parse or map IRQ\n"); 302 + return -ENXIO; 303 + } 304 + 305 + error = devm_request_threaded_irq(dev, irq, NULL, cap11xx_thread_func, 306 + IRQF_ONESHOT, dev_name(dev), priv); 307 + if (error) 308 + return error; 309 + 310 + return 0; 311 + } 312 + 313 + static const struct of_device_id cap11xx_dt_ids[] = { 314 + { .compatible = "microchip,cap1106", }, 315 + {} 316 + }; 317 + MODULE_DEVICE_TABLE(of, cap11xx_dt_ids); 318 + 319 + static const struct i2c_device_id cap11xx_i2c_ids[] = { 320 + { "cap1106", 0 }, 321 + {} 322 + }; 323 + MODULE_DEVICE_TABLE(i2c, cap11xx_i2c_ids); 324 + 325 + static struct i2c_driver cap11xx_i2c_driver = { 326 + .driver = { 327 + .name = "cap11xx", 328 + .owner = THIS_MODULE, 329 + .of_match_table = cap11xx_dt_ids, 330 + }, 331 + .id_table = cap11xx_i2c_ids, 332 + .probe = cap11xx_i2c_probe, 333 + }; 334 + 335 + module_i2c_driver(cap11xx_i2c_driver); 336 + 337 + MODULE_ALIAS("platform:cap11xx"); 338 + MODULE_DESCRIPTION("Microchip CAP11XX driver"); 339 + MODULE_AUTHOR("Daniel Mack <linux@zonque.org>"); 340 + MODULE_LICENSE("GPL v2");