Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 1 | /* |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 2 | * Intel MID Resistive Touch Screen Driver |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2008 Intel Corp |
| 5 | * |
| 6 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 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 as published by |
| 10 | * the Free Software Foundation; version 2 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, but |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 19 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 20 | * |
| 21 | * Questions/Comments/Bug fixes to Sreedhara (sreedhara.ds@intel.com) |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 22 | * Ramesh Agarwal (ramesh.agarwal@intel.com) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 24 | * |
| 25 | * TODO: |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 26 | * review conversion of r/m/w sequences |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 27 | */ |
| 28 | |
| 29 | #include <linux/module.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/input.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/err.h> |
| 34 | #include <linux/param.h> |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 35 | #include <linux/slab.h> |
| 36 | #include <linux/platform_device.h> |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 37 | #include <linux/irq.h> |
| 38 | #include <linux/delay.h> |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 39 | #include <asm/intel_scu_ipc.h> |
| 40 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 41 | /* PMIC Interrupt registers */ |
| 42 | #define PMIC_REG_ID1 0x00 /* PMIC ID1 register */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 43 | |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 44 | /* PMIC Interrupt registers */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 45 | #define PMIC_REG_INT 0x04 /* PMIC interrupt register */ |
| 46 | #define PMIC_REG_MINT 0x05 /* PMIC interrupt mask register */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 47 | |
| 48 | /* ADC Interrupt registers */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 49 | #define PMIC_REG_ADCINT 0x5F /* ADC interrupt register */ |
| 50 | #define PMIC_REG_MADCINT 0x60 /* ADC interrupt mask register */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 51 | |
| 52 | /* ADC Control registers */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 53 | #define PMIC_REG_ADCCNTL1 0x61 /* ADC control register */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 54 | |
| 55 | /* ADC Channel Selection registers */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 56 | #define PMICADDR0 0xA4 |
| 57 | #define END_OF_CHANNEL 0x1F |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 58 | |
| 59 | /* ADC Result register */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 60 | #define PMIC_REG_ADCSNS0H 0x64 |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 61 | |
| 62 | /* ADC channels for touch screen */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 63 | #define MRST_TS_CHAN10 0xA /* Touch screen X+ connection */ |
| 64 | #define MRST_TS_CHAN11 0xB /* Touch screen X- connection */ |
| 65 | #define MRST_TS_CHAN12 0xC /* Touch screen Y+ connection */ |
| 66 | #define MRST_TS_CHAN13 0xD /* Touch screen Y- connection */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 67 | |
| 68 | /* Touch screen channel BIAS constants */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 69 | #define MRST_XBIAS 0x20 |
| 70 | #define MRST_YBIAS 0x40 |
| 71 | #define MRST_ZBIAS 0x80 |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 72 | |
| 73 | /* Touch screen coordinates */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 74 | #define MRST_X_MIN 10 |
| 75 | #define MRST_X_MAX 1024 |
| 76 | #define MRST_X_FUZZ 5 |
| 77 | #define MRST_Y_MIN 10 |
| 78 | #define MRST_Y_MAX 1024 |
| 79 | #define MRST_Y_FUZZ 5 |
| 80 | #define MRST_PRESSURE_MIN 0 |
| 81 | #define MRST_PRESSURE_NOMINAL 50 |
| 82 | #define MRST_PRESSURE_MAX 100 |
Alan Cox | aff4c34 | 2010-08-31 22:20:55 -0700 | [diff] [blame] | 83 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 84 | #define WAIT_ADC_COMPLETION 10 /* msec */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 85 | |
| 86 | /* PMIC ADC round robin delays */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 87 | #define ADC_LOOP_DELAY0 0x0 /* Continuous loop */ |
| 88 | #define ADC_LOOP_DELAY1 0x1 /* 4.5 ms approximate */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 89 | |
| 90 | /* PMIC Vendor Identifiers */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 91 | #define PMIC_VENDOR_FS 0 /* PMIC vendor FreeScale */ |
| 92 | #define PMIC_VENDOR_MAXIM 1 /* PMIC vendor MAXIM */ |
| 93 | #define PMIC_VENDOR_NEC 2 /* PMIC vendor NEC */ |
| 94 | #define MRSTOUCH_MAX_CHANNELS 32 /* Maximum ADC channels */ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 95 | |
| 96 | /* Touch screen device structure */ |
| 97 | struct mrstouch_dev { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 98 | struct device *dev; /* device associated with touch screen */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 99 | struct input_dev *input; |
| 100 | char phys[32]; |
| 101 | u16 asr; /* Address selection register */ |
| 102 | int irq; |
| 103 | unsigned int vendor; /* PMIC vendor */ |
| 104 | unsigned int rev; /* PMIC revision */ |
| 105 | |
| 106 | int (*read_prepare)(struct mrstouch_dev *tsdev); |
| 107 | int (*read)(struct mrstouch_dev *tsdev, u16 *x, u16 *y, u16 *z); |
| 108 | int (*read_finish)(struct mrstouch_dev *tsdev); |
| 109 | }; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 110 | |
| 111 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 112 | /*************************** NEC and Maxim Interface ************************/ |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 113 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 114 | static int mrstouch_nec_adc_read_prepare(struct mrstouch_dev *tsdev) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 115 | { |
Andy Ross | a9cfa25 | 2010-08-31 23:00:41 -0700 | [diff] [blame] | 116 | return intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0, 0x20); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | /* |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 120 | * Enables PENDET interrupt. |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 121 | */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 122 | static int mrstouch_nec_adc_read_finish(struct mrstouch_dev *tsdev) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 123 | { |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 124 | int err; |
| 125 | |
Andy Ross | a9cfa25 | 2010-08-31 23:00:41 -0700 | [diff] [blame] | 126 | err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x20, 0x20); |
| 127 | if (!err) |
| 128 | err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, 0, 0x05); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 129 | |
Andy Ross | a9cfa25 | 2010-08-31 23:00:41 -0700 | [diff] [blame] | 130 | return err; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 131 | } |
| 132 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 133 | /* |
| 134 | * Reads PMIC ADC touch screen result |
| 135 | * Reads ADC storage registers for higher 7 and lower 3 bits and |
| 136 | * converts the two readings into a single value and turns off gain bit |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 137 | */ |
| 138 | static int mrstouch_ts_chan_read(u16 offset, u16 chan, u16 *vp, u16 *vm) |
| 139 | { |
| 140 | int err; |
| 141 | u16 result; |
| 142 | u32 res; |
| 143 | |
| 144 | result = PMIC_REG_ADCSNS0H + offset; |
| 145 | |
| 146 | if (chan == MRST_TS_CHAN12) |
| 147 | result += 4; |
| 148 | |
| 149 | err = intel_scu_ipc_ioread32(result, &res); |
| 150 | if (err) |
| 151 | return err; |
| 152 | |
| 153 | /* Mash the bits up */ |
| 154 | |
| 155 | *vp = (res & 0xFF) << 3; /* Highest 7 bits */ |
| 156 | *vp |= (res >> 8) & 0x07; /* Lower 3 bits */ |
| 157 | *vp &= 0x3FF; |
| 158 | |
| 159 | res >>= 16; |
| 160 | |
| 161 | *vm = (res & 0xFF) << 3; /* Highest 7 bits */ |
| 162 | *vm |= (res >> 8) & 0x07; /* Lower 3 bits */ |
| 163 | *vm &= 0x3FF; |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 168 | /* |
| 169 | * Enables X, Y and Z bias values |
| 170 | * Enables YPYM for X channels and XPXM for Y channels |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 171 | */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 172 | static int mrstouch_ts_bias_set(uint offset, uint bias) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 173 | { |
| 174 | int count; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 175 | u16 chan, start; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 176 | u16 reg[4]; |
| 177 | u8 data[4]; |
| 178 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 179 | chan = PMICADDR0 + offset; |
| 180 | start = MRST_TS_CHAN10; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 181 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 182 | for (count = 0; count <= 3; count++) { |
| 183 | reg[count] = chan++; |
| 184 | data[count] = bias | (start + count); |
| 185 | } |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 186 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 187 | return intel_scu_ipc_writev(reg, data, 4); |
| 188 | } |
| 189 | |
| 190 | /* To read touch screen channel values */ |
| 191 | static int mrstouch_nec_adc_read(struct mrstouch_dev *tsdev, |
| 192 | u16 *x, u16 *y, u16 *z) |
| 193 | { |
| 194 | int err; |
| 195 | u16 xm, ym, zm; |
| 196 | |
| 197 | /* configure Y bias for X channels */ |
| 198 | err = mrstouch_ts_bias_set(tsdev->asr, MRST_YBIAS); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 199 | if (err) |
| 200 | goto ipc_error; |
| 201 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 202 | msleep(WAIT_ADC_COMPLETION); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 203 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 204 | /* read x+ and x- channels */ |
| 205 | err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, x, &xm); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 206 | if (err) |
| 207 | goto ipc_error; |
| 208 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 209 | /* configure x bias for y channels */ |
| 210 | err = mrstouch_ts_bias_set(tsdev->asr, MRST_XBIAS); |
| 211 | if (err) |
| 212 | goto ipc_error; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 213 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 214 | msleep(WAIT_ADC_COMPLETION); |
| 215 | |
| 216 | /* read y+ and y- channels */ |
| 217 | err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN12, y, &ym); |
| 218 | if (err) |
| 219 | goto ipc_error; |
| 220 | |
| 221 | /* configure z bias for x and y channels */ |
| 222 | err = mrstouch_ts_bias_set(tsdev->asr, MRST_ZBIAS); |
| 223 | if (err) |
| 224 | goto ipc_error; |
| 225 | |
| 226 | msleep(WAIT_ADC_COMPLETION); |
| 227 | |
| 228 | /* read z+ and z- channels */ |
| 229 | err = mrstouch_ts_chan_read(tsdev->asr, MRST_TS_CHAN10, z, &zm); |
| 230 | if (err) |
| 231 | goto ipc_error; |
| 232 | |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 233 | return 0; |
| 234 | |
| 235 | ipc_error: |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 236 | dev_err(tsdev->dev, "ipc error during adc read\n"); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 237 | return err; |
| 238 | } |
| 239 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 240 | |
| 241 | /*************************** Freescale Interface ************************/ |
| 242 | |
| 243 | static int mrstouch_fs_adc_read_prepare(struct mrstouch_dev *tsdev) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 244 | { |
| 245 | int err, count; |
| 246 | u16 chan; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 247 | u16 reg[5]; |
| 248 | u8 data[5]; |
| 249 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 250 | /* Stop the ADC */ |
| 251 | err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x00, 0x02); |
| 252 | if (err) |
| 253 | goto ipc_error; |
| 254 | |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 255 | chan = PMICADDR0 + tsdev->asr; |
| 256 | |
| 257 | /* Set X BIAS */ |
| 258 | for (count = 0; count <= 3; count++) { |
| 259 | reg[count] = chan++; |
| 260 | data[count] = 0x2A; |
| 261 | } |
| 262 | reg[count] = chan++; /* Dummy */ |
| 263 | data[count] = 0; |
| 264 | |
| 265 | err = intel_scu_ipc_writev(reg, data, 5); |
| 266 | if (err) |
| 267 | goto ipc_error; |
| 268 | |
| 269 | msleep(WAIT_ADC_COMPLETION); |
| 270 | |
| 271 | /* Set Y BIAS */ |
| 272 | for (count = 0; count <= 3; count++) { |
| 273 | reg[count] = chan++; |
| 274 | data[count] = 0x4A; |
| 275 | } |
| 276 | reg[count] = chan++; /* Dummy */ |
| 277 | data[count] = 0; |
| 278 | |
| 279 | err = intel_scu_ipc_writev(reg, data, 5); |
| 280 | if (err) |
| 281 | goto ipc_error; |
| 282 | |
| 283 | msleep(WAIT_ADC_COMPLETION); |
| 284 | |
| 285 | /* Set Z BIAS */ |
| 286 | err = intel_scu_ipc_iowrite32(chan + 2, 0x8A8A8A8A); |
| 287 | if (err) |
| 288 | goto ipc_error; |
| 289 | |
| 290 | msleep(WAIT_ADC_COMPLETION); |
| 291 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 292 | return 0; |
| 293 | |
| 294 | ipc_error: |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 295 | dev_err(tsdev->dev, "ipc error during %s\n", __func__); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 296 | return err; |
| 297 | } |
| 298 | |
| 299 | static int mrstouch_fs_adc_read(struct mrstouch_dev *tsdev, |
| 300 | u16 *x, u16 *y, u16 *z) |
| 301 | { |
| 302 | int err; |
| 303 | u16 result; |
| 304 | u16 reg[4]; |
| 305 | u8 data[4]; |
| 306 | |
| 307 | result = PMIC_REG_ADCSNS0H + tsdev->asr; |
| 308 | |
| 309 | reg[0] = result + 4; |
| 310 | reg[1] = result + 5; |
| 311 | reg[2] = result + 16; |
| 312 | reg[3] = result + 17; |
| 313 | |
| 314 | err = intel_scu_ipc_readv(reg, data, 4); |
| 315 | if (err) |
| 316 | goto ipc_error; |
| 317 | |
| 318 | *x = data[0] << 3; /* Higher 7 bits */ |
| 319 | *x |= data[1] & 0x7; /* Lower 3 bits */ |
| 320 | *x &= 0x3FF; |
| 321 | |
| 322 | *y = data[2] << 3; /* Higher 7 bits */ |
| 323 | *y |= data[3] & 0x7; /* Lower 3 bits */ |
| 324 | *y &= 0x3FF; |
| 325 | |
| 326 | /* Read Z value */ |
| 327 | reg[0] = result + 28; |
| 328 | reg[1] = result + 29; |
| 329 | |
| 330 | err = intel_scu_ipc_readv(reg, data, 4); |
| 331 | if (err) |
| 332 | goto ipc_error; |
| 333 | |
| 334 | *z = data[0] << 3; /* Higher 7 bits */ |
| 335 | *z |= data[1] & 0x7; /* Lower 3 bits */ |
| 336 | *z &= 0x3FF; |
| 337 | |
| 338 | return 0; |
| 339 | |
| 340 | ipc_error: |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 341 | dev_err(tsdev->dev, "ipc error during %s\n", __func__); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 342 | return err; |
| 343 | } |
| 344 | |
| 345 | static int mrstouch_fs_adc_read_finish(struct mrstouch_dev *tsdev) |
| 346 | { |
| 347 | int err, count; |
| 348 | u16 chan; |
| 349 | u16 reg[5]; |
| 350 | u8 data[5]; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 351 | |
| 352 | /* Clear all TS channels */ |
| 353 | chan = PMICADDR0 + tsdev->asr; |
| 354 | for (count = 0; count <= 4; count++) { |
| 355 | reg[count] = chan++; |
| 356 | data[count] = 0; |
| 357 | } |
| 358 | err = intel_scu_ipc_writev(reg, data, 5); |
| 359 | if (err) |
| 360 | goto ipc_error; |
| 361 | |
| 362 | for (count = 0; count <= 4; count++) { |
| 363 | reg[count] = chan++; |
| 364 | data[count] = 0; |
| 365 | } |
| 366 | err = intel_scu_ipc_writev(reg, data, 5); |
| 367 | if (err) |
| 368 | goto ipc_error; |
| 369 | |
| 370 | err = intel_scu_ipc_iowrite32(chan + 2, 0x00000000); |
| 371 | if (err) |
| 372 | goto ipc_error; |
| 373 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 374 | /* Start ADC */ |
| 375 | err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, 0x02, 0x02); |
| 376 | if (err) |
| 377 | goto ipc_error; |
| 378 | |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 379 | return 0; |
| 380 | |
| 381 | ipc_error: |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 382 | dev_err(tsdev->dev, "ipc error during %s\n", __func__); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 383 | return err; |
| 384 | } |
| 385 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 386 | static void mrstouch_report_event(struct input_dev *input, |
| 387 | unsigned int x, unsigned int y, unsigned int z) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 388 | { |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 389 | if (z > MRST_PRESSURE_NOMINAL) { |
| 390 | /* Pen touched, report button touch and coordinates */ |
| 391 | input_report_key(input, BTN_TOUCH, 1); |
| 392 | input_report_abs(input, ABS_X, x); |
| 393 | input_report_abs(input, ABS_Y, y); |
| 394 | } else { |
| 395 | input_report_key(input, BTN_TOUCH, 0); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 396 | } |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 397 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 398 | input_report_abs(input, ABS_PRESSURE, z); |
| 399 | input_sync(input); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 400 | } |
| 401 | |
| 402 | /* PENDET interrupt handler */ |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 403 | static irqreturn_t mrstouch_pendet_irq(int irq, void *dev_id) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 404 | { |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 405 | struct mrstouch_dev *tsdev = dev_id; |
| 406 | u16 x, y, z; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 407 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 408 | /* |
| 409 | * Should we lower thread priority? Probably not, since we are |
| 410 | * not spinning but sleeping... |
| 411 | */ |
| 412 | |
| 413 | if (tsdev->read_prepare(tsdev)) |
| 414 | goto out; |
| 415 | |
| 416 | do { |
| 417 | if (tsdev->read(tsdev, &x, &y, &z)) |
| 418 | break; |
| 419 | |
| 420 | mrstouch_report_event(tsdev->input, x, y, z); |
| 421 | } while (z > MRST_PRESSURE_NOMINAL); |
| 422 | |
| 423 | tsdev->read_finish(tsdev); |
| 424 | |
| 425 | out: |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 426 | return IRQ_HANDLED; |
| 427 | } |
| 428 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 429 | /* Utility to read PMIC ID */ |
| 430 | static int __devinit mrstouch_read_pmic_id(uint *vendor, uint *rev) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 431 | { |
| 432 | int err; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 433 | u8 r; |
| 434 | |
| 435 | err = intel_scu_ipc_ioread8(PMIC_REG_ID1, &r); |
| 436 | if (err) |
| 437 | return err; |
| 438 | |
| 439 | *vendor = r & 0x7; |
| 440 | *rev = (r >> 3) & 0x7; |
| 441 | |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | /* |
| 446 | * Parse ADC channels to find end of the channel configured by other ADC user |
| 447 | * NEC and MAXIM requires 4 channels and FreeScale needs 18 channels |
| 448 | */ |
| 449 | static int __devinit mrstouch_chan_parse(struct mrstouch_dev *tsdev) |
| 450 | { |
Axel Lin | e449edb | 2011-07-18 17:09:05 -0700 | [diff] [blame] | 451 | int found = 0; |
| 452 | int err, i; |
Arjan van de Ven | 409d568 | 2010-08-31 22:57:31 -0700 | [diff] [blame] | 453 | u8 r8; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 454 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 455 | for (i = 0; i < MRSTOUCH_MAX_CHANNELS; i++) { |
Arjan van de Ven | 409d568 | 2010-08-31 22:57:31 -0700 | [diff] [blame] | 456 | err = intel_scu_ipc_ioread8(PMICADDR0 + i, &r8); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 457 | if (err) |
| 458 | return err; |
| 459 | |
Arjan van de Ven | 409d568 | 2010-08-31 22:57:31 -0700 | [diff] [blame] | 460 | if (r8 == END_OF_CHANNEL) { |
| 461 | found = i; |
| 462 | break; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 463 | } |
| 464 | } |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 465 | |
| 466 | if (tsdev->vendor == PMIC_VENDOR_FS) { |
Axel Lin | e449edb | 2011-07-18 17:09:05 -0700 | [diff] [blame] | 467 | if (found > MRSTOUCH_MAX_CHANNELS - 18) |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 468 | return -ENOSPC; |
| 469 | } else { |
Axel Lin | e449edb | 2011-07-18 17:09:05 -0700 | [diff] [blame] | 470 | if (found > MRSTOUCH_MAX_CHANNELS - 4) |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 471 | return -ENOSPC; |
| 472 | } |
Axel Lin | e449edb | 2011-07-18 17:09:05 -0700 | [diff] [blame] | 473 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 474 | return found; |
| 475 | } |
| 476 | |
| 477 | |
| 478 | /* |
| 479 | * Writes touch screen channels to ADC address selection registers |
| 480 | */ |
| 481 | static int __devinit mrstouch_ts_chan_set(uint offset) |
| 482 | { |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 483 | u16 chan; |
Arjan van de Ven | 409d568 | 2010-08-31 22:57:31 -0700 | [diff] [blame] | 484 | |
| 485 | int ret, count; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 486 | |
| 487 | chan = PMICADDR0 + offset; |
| 488 | for (count = 0; count <= 3; count++) { |
Arjan van de Ven | 409d568 | 2010-08-31 22:57:31 -0700 | [diff] [blame] | 489 | ret = intel_scu_ipc_iowrite8(chan++, MRST_TS_CHAN10 + count); |
| 490 | if (ret) |
| 491 | return ret; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 492 | } |
Arjan van de Ven | 409d568 | 2010-08-31 22:57:31 -0700 | [diff] [blame] | 493 | return intel_scu_ipc_iowrite8(chan++, END_OF_CHANNEL); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 494 | } |
| 495 | |
| 496 | /* Initialize ADC */ |
| 497 | static int __devinit mrstouch_adc_init(struct mrstouch_dev *tsdev) |
| 498 | { |
| 499 | int err, start; |
| 500 | u8 ra, rm; |
| 501 | |
| 502 | err = mrstouch_read_pmic_id(&tsdev->vendor, &tsdev->rev); |
| 503 | if (err) { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 504 | dev_err(tsdev->dev, "Unable to read PMIC id\n"); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 505 | return err; |
| 506 | } |
| 507 | |
| 508 | switch (tsdev->vendor) { |
| 509 | case PMIC_VENDOR_NEC: |
| 510 | case PMIC_VENDOR_MAXIM: |
| 511 | tsdev->read_prepare = mrstouch_nec_adc_read_prepare; |
| 512 | tsdev->read = mrstouch_nec_adc_read; |
| 513 | tsdev->read_finish = mrstouch_nec_adc_read_finish; |
| 514 | break; |
| 515 | |
| 516 | case PMIC_VENDOR_FS: |
| 517 | tsdev->read_prepare = mrstouch_fs_adc_read_prepare; |
| 518 | tsdev->read = mrstouch_fs_adc_read; |
| 519 | tsdev->read_finish = mrstouch_fs_adc_read_finish; |
| 520 | break; |
| 521 | |
| 522 | default: |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 523 | dev_err(tsdev->dev, |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 524 | "Unsupported touchscreen: %d\n", tsdev->vendor); |
| 525 | return -ENXIO; |
| 526 | } |
| 527 | |
| 528 | start = mrstouch_chan_parse(tsdev); |
| 529 | if (start < 0) { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 530 | dev_err(tsdev->dev, "Unable to parse channels\n"); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 531 | return start; |
| 532 | } |
| 533 | |
| 534 | tsdev->asr = start; |
| 535 | |
| 536 | /* |
| 537 | * ADC power on, start, enable PENDET and set loop delay |
| 538 | * ADC loop delay is set to 4.5 ms approximately |
| 539 | * Loop delay more than this results in jitter in adc readings |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 540 | * Setting loop delay to 0 (continuous loop) in MAXIM stops PENDET |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 541 | * interrupt generation sometimes. |
| 542 | */ |
| 543 | |
| 544 | if (tsdev->vendor == PMIC_VENDOR_FS) { |
| 545 | ra = 0xE0 | ADC_LOOP_DELAY0; |
| 546 | rm = 0x5; |
| 547 | } else { |
| 548 | /* NEC and MAXIm not consistent with loop delay 0 */ |
| 549 | ra = 0xE0 | ADC_LOOP_DELAY1; |
| 550 | rm = 0x0; |
| 551 | |
| 552 | /* configure touch screen channels */ |
| 553 | err = mrstouch_ts_chan_set(tsdev->asr); |
| 554 | if (err) |
| 555 | return err; |
| 556 | } |
| 557 | |
| 558 | err = intel_scu_ipc_update_register(PMIC_REG_ADCCNTL1, ra, 0xE7); |
| 559 | if (err) |
| 560 | return err; |
| 561 | |
| 562 | err = intel_scu_ipc_update_register(PMIC_REG_MADCINT, rm, 0x03); |
| 563 | if (err) |
| 564 | return err; |
| 565 | |
| 566 | return 0; |
| 567 | } |
| 568 | |
| 569 | |
| 570 | /* Probe function for touch screen driver */ |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 571 | static int __devinit mrstouch_probe(struct platform_device *pdev) |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 572 | { |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 573 | struct mrstouch_dev *tsdev; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 574 | struct input_dev *input; |
| 575 | int err; |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 576 | int irq; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 577 | |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 578 | irq = platform_get_irq(pdev, 0); |
| 579 | if (irq < 0) { |
| 580 | dev_err(&pdev->dev, "no interrupt assigned\n"); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 581 | return -EINVAL; |
| 582 | } |
| 583 | |
| 584 | tsdev = kzalloc(sizeof(struct mrstouch_dev), GFP_KERNEL); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 585 | input = input_allocate_device(); |
| 586 | if (!tsdev || !input) { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 587 | dev_err(&pdev->dev, "unable to allocate memory\n"); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 588 | err = -ENOMEM; |
| 589 | goto err_free_mem; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 590 | } |
| 591 | |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 592 | tsdev->dev = &pdev->dev; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 593 | tsdev->input = input; |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 594 | tsdev->irq = irq; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 595 | |
| 596 | snprintf(tsdev->phys, sizeof(tsdev->phys), |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 597 | "%s/input0", dev_name(tsdev->dev)); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 598 | |
| 599 | err = mrstouch_adc_init(tsdev); |
| 600 | if (err) { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 601 | dev_err(&pdev->dev, "ADC initialization failed\n"); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 602 | goto err_free_mem; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 603 | } |
| 604 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 605 | input->name = "mrst_touchscreen"; |
| 606 | input->phys = tsdev->phys; |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 607 | input->dev.parent = tsdev->dev; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 608 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 609 | input->id.vendor = tsdev->vendor; |
| 610 | input->id.version = tsdev->rev; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 611 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 612 | input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS); |
| 613 | input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 614 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 615 | input_set_abs_params(tsdev->input, ABS_X, |
| 616 | MRST_X_MIN, MRST_X_MAX, MRST_X_FUZZ, 0); |
| 617 | input_set_abs_params(tsdev->input, ABS_Y, |
| 618 | MRST_Y_MIN, MRST_Y_MAX, MRST_Y_FUZZ, 0); |
| 619 | input_set_abs_params(tsdev->input, ABS_PRESSURE, |
| 620 | MRST_PRESSURE_MIN, MRST_PRESSURE_MAX, 0, 0); |
| 621 | |
| 622 | err = request_threaded_irq(tsdev->irq, NULL, mrstouch_pendet_irq, |
Lars-Peter Clausen | 9b7e31b | 2012-07-04 13:02:56 -0700 | [diff] [blame] | 623 | IRQF_ONESHOT, "mrstouch", tsdev); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 624 | if (err) { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 625 | dev_err(tsdev->dev, "unable to allocate irq\n"); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 626 | goto err_free_mem; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 627 | } |
| 628 | |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 629 | err = input_register_device(tsdev->input); |
| 630 | if (err) { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 631 | dev_err(tsdev->dev, "unable to register input device\n"); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 632 | goto err_free_irq; |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 633 | } |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 634 | |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 635 | platform_set_drvdata(pdev, tsdev); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 636 | return 0; |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 637 | |
| 638 | err_free_irq: |
| 639 | free_irq(tsdev->irq, tsdev); |
| 640 | err_free_mem: |
| 641 | input_free_device(input); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 642 | kfree(tsdev); |
| 643 | return err; |
| 644 | } |
| 645 | |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 646 | static int __devexit mrstouch_remove(struct platform_device *pdev) |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 647 | { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 648 | struct mrstouch_dev *tsdev = platform_get_drvdata(pdev); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 649 | |
| 650 | free_irq(tsdev->irq, tsdev); |
| 651 | input_unregister_device(tsdev->input); |
| 652 | kfree(tsdev); |
| 653 | |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 654 | platform_set_drvdata(pdev, NULL); |
Dmitry Torokhov | 95b7127 | 2010-08-31 22:57:28 -0700 | [diff] [blame] | 655 | |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 656 | return 0; |
| 657 | } |
| 658 | |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 659 | static struct platform_driver mrstouch_driver = { |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 660 | .driver = { |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 661 | .name = "pmic_touch", |
| 662 | .owner = THIS_MODULE, |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 663 | }, |
Alek Du | 36466a1 | 2010-08-31 22:57:30 -0700 | [diff] [blame] | 664 | .probe = mrstouch_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame^] | 665 | .remove = mrstouch_remove, |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 666 | }; |
JJ Ding | cdcc96e | 2011-11-29 11:14:13 -0800 | [diff] [blame] | 667 | module_platform_driver(mrstouch_driver); |
Sreedhara DS | a4cff8b | 2010-06-01 12:50:06 +0100 | [diff] [blame] | 668 | |
| 669 | MODULE_AUTHOR("Sreedhara Murthy. D.S, sreedhara.ds@intel.com"); |
| 670 | MODULE_DESCRIPTION("Intel Moorestown Resistive Touch Screen Driver"); |
| 671 | MODULE_LICENSE("GPL"); |