Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Atmel Touch Screen Driver |
| 3 | * |
| 4 | * Copyright (c) 2008 ATMEL |
| 5 | * Copyright (c) 2008 Dan Liang |
| 6 | * Copyright (c) 2008 TimeSys Corporation |
| 7 | * Copyright (c) 2008 Justin Waters |
| 8 | * |
| 9 | * Based on touchscreen code from Atmel Corporation. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
| 14 | */ |
| 15 | #include <linux/init.h> |
| 16 | #include <linux/err.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/module.h> |
| 19 | #include <linux/input.h> |
| 20 | #include <linux/slab.h> |
| 21 | #include <linux/interrupt.h> |
| 22 | #include <linux/clk.h> |
| 23 | #include <linux/platform_device.h> |
| 24 | #include <linux/io.h> |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 25 | #include <mach/board.h> |
| 26 | #include <mach/cpu.h> |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 27 | |
| 28 | /* Register definitions based on AT91SAM9RL64 preliminary draft datasheet */ |
| 29 | |
| 30 | #define ATMEL_TSADCC_CR 0x00 /* Control register */ |
| 31 | #define ATMEL_TSADCC_SWRST (1 << 0) /* Software Reset*/ |
| 32 | #define ATMEL_TSADCC_START (1 << 1) /* Start conversion */ |
| 33 | |
| 34 | #define ATMEL_TSADCC_MR 0x04 /* Mode register */ |
| 35 | #define ATMEL_TSADCC_TSAMOD (3 << 0) /* ADC mode */ |
| 36 | #define ATMEL_TSADCC_TSAMOD_ADC_ONLY_MODE (0x0) /* ADC Mode */ |
| 37 | #define ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE (0x1) /* Touch Screen Only Mode */ |
| 38 | #define ATMEL_TSADCC_LOWRES (1 << 4) /* Resolution selection */ |
| 39 | #define ATMEL_TSADCC_SLEEP (1 << 5) /* Sleep mode */ |
| 40 | #define ATMEL_TSADCC_PENDET (1 << 6) /* Pen Detect selection */ |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 41 | #define ATMEL_TSADCC_PRES (1 << 7) /* Pressure Measurement Selection */ |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 42 | #define ATMEL_TSADCC_PRESCAL (0x3f << 8) /* Prescalar Rate Selection */ |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 43 | #define ATMEL_TSADCC_EPRESCAL (0xff << 8) /* Prescalar Rate Selection (Extended) */ |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 44 | #define ATMEL_TSADCC_STARTUP (0x7f << 16) /* Start Up time */ |
| 45 | #define ATMEL_TSADCC_SHTIM (0xf << 24) /* Sample & Hold time */ |
| 46 | #define ATMEL_TSADCC_PENDBC (0xf << 28) /* Pen Detect debouncing time */ |
| 47 | |
| 48 | #define ATMEL_TSADCC_TRGR 0x08 /* Trigger register */ |
| 49 | #define ATMEL_TSADCC_TRGMOD (7 << 0) /* Trigger mode */ |
| 50 | #define ATMEL_TSADCC_TRGMOD_NONE (0 << 0) |
| 51 | #define ATMEL_TSADCC_TRGMOD_EXT_RISING (1 << 0) |
| 52 | #define ATMEL_TSADCC_TRGMOD_EXT_FALLING (2 << 0) |
| 53 | #define ATMEL_TSADCC_TRGMOD_EXT_ANY (3 << 0) |
| 54 | #define ATMEL_TSADCC_TRGMOD_PENDET (4 << 0) |
| 55 | #define ATMEL_TSADCC_TRGMOD_PERIOD (5 << 0) |
| 56 | #define ATMEL_TSADCC_TRGMOD_CONTINUOUS (6 << 0) |
| 57 | #define ATMEL_TSADCC_TRGPER (0xffff << 16) /* Trigger period */ |
| 58 | |
| 59 | #define ATMEL_TSADCC_TSR 0x0C /* Touch Screen register */ |
| 60 | #define ATMEL_TSADCC_TSFREQ (0xf << 0) /* TS Frequency in Interleaved mode */ |
| 61 | #define ATMEL_TSADCC_TSSHTIM (0xf << 24) /* Sample & Hold time */ |
| 62 | |
| 63 | #define ATMEL_TSADCC_CHER 0x10 /* Channel Enable register */ |
| 64 | #define ATMEL_TSADCC_CHDR 0x14 /* Channel Disable register */ |
| 65 | #define ATMEL_TSADCC_CHSR 0x18 /* Channel Status register */ |
| 66 | #define ATMEL_TSADCC_CH(n) (1 << (n)) /* Channel number */ |
| 67 | |
| 68 | #define ATMEL_TSADCC_SR 0x1C /* Status register */ |
| 69 | #define ATMEL_TSADCC_EOC(n) (1 << ((n)+0)) /* End of conversion for channel N */ |
| 70 | #define ATMEL_TSADCC_OVRE(n) (1 << ((n)+8)) /* Overrun error for channel N */ |
| 71 | #define ATMEL_TSADCC_DRDY (1 << 16) /* Data Ready */ |
| 72 | #define ATMEL_TSADCC_GOVRE (1 << 17) /* General Overrun Error */ |
| 73 | #define ATMEL_TSADCC_ENDRX (1 << 18) /* End of RX Buffer */ |
| 74 | #define ATMEL_TSADCC_RXBUFF (1 << 19) /* TX Buffer full */ |
| 75 | #define ATMEL_TSADCC_PENCNT (1 << 20) /* Pen contact */ |
| 76 | #define ATMEL_TSADCC_NOCNT (1 << 21) /* No contact */ |
| 77 | |
| 78 | #define ATMEL_TSADCC_LCDR 0x20 /* Last Converted Data register */ |
| 79 | #define ATMEL_TSADCC_DATA (0x3ff << 0) /* Channel data */ |
| 80 | |
| 81 | #define ATMEL_TSADCC_IER 0x24 /* Interrupt Enable register */ |
| 82 | #define ATMEL_TSADCC_IDR 0x28 /* Interrupt Disable register */ |
| 83 | #define ATMEL_TSADCC_IMR 0x2C /* Interrupt Mask register */ |
| 84 | #define ATMEL_TSADCC_CDR0 0x30 /* Channel Data 0 */ |
| 85 | #define ATMEL_TSADCC_CDR1 0x34 /* Channel Data 1 */ |
| 86 | #define ATMEL_TSADCC_CDR2 0x38 /* Channel Data 2 */ |
| 87 | #define ATMEL_TSADCC_CDR3 0x3C /* Channel Data 3 */ |
| 88 | #define ATMEL_TSADCC_CDR4 0x40 /* Channel Data 4 */ |
| 89 | #define ATMEL_TSADCC_CDR5 0x44 /* Channel Data 5 */ |
| 90 | |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 91 | #define ATMEL_TSADCC_XPOS 0x50 |
| 92 | #define ATMEL_TSADCC_Z1DAT 0x54 |
| 93 | #define ATMEL_TSADCC_Z2DAT 0x58 |
| 94 | |
| 95 | #define PRESCALER_VAL(x) ((x) >> 8) |
| 96 | |
| 97 | #define ADC_DEFAULT_CLOCK 100000 |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 98 | |
| 99 | struct atmel_tsadcc { |
| 100 | struct input_dev *input; |
| 101 | char phys[32]; |
| 102 | struct clk *clk; |
| 103 | int irq; |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 104 | unsigned int prev_absx; |
| 105 | unsigned int prev_absy; |
| 106 | unsigned char bufferedmeasure; |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 107 | }; |
| 108 | |
| 109 | static void __iomem *tsc_base; |
| 110 | |
| 111 | #define atmel_tsadcc_read(reg) __raw_readl(tsc_base + (reg)) |
| 112 | #define atmel_tsadcc_write(reg, val) __raw_writel((val), tsc_base + (reg)) |
| 113 | |
| 114 | static irqreturn_t atmel_tsadcc_interrupt(int irq, void *dev) |
| 115 | { |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 116 | struct atmel_tsadcc *ts_dev = (struct atmel_tsadcc *)dev; |
| 117 | struct input_dev *input_dev = ts_dev->input; |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 118 | |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 119 | unsigned int status; |
| 120 | unsigned int reg; |
| 121 | |
| 122 | status = atmel_tsadcc_read(ATMEL_TSADCC_SR); |
| 123 | status &= atmel_tsadcc_read(ATMEL_TSADCC_IMR); |
| 124 | |
| 125 | if (status & ATMEL_TSADCC_NOCNT) { |
| 126 | /* Contact lost */ |
| 127 | reg = atmel_tsadcc_read(ATMEL_TSADCC_MR) | ATMEL_TSADCC_PENDBC; |
| 128 | |
| 129 | atmel_tsadcc_write(ATMEL_TSADCC_MR, reg); |
| 130 | atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE); |
| 131 | atmel_tsadcc_write(ATMEL_TSADCC_IDR, |
| 132 | ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT); |
| 133 | atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT); |
| 134 | |
| 135 | input_report_key(input_dev, BTN_TOUCH, 0); |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 136 | ts_dev->bufferedmeasure = 0; |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 137 | input_sync(input_dev); |
| 138 | |
| 139 | } else if (status & ATMEL_TSADCC_PENCNT) { |
| 140 | /* Pen detected */ |
| 141 | reg = atmel_tsadcc_read(ATMEL_TSADCC_MR); |
| 142 | reg &= ~ATMEL_TSADCC_PENDBC; |
| 143 | |
| 144 | atmel_tsadcc_write(ATMEL_TSADCC_IDR, ATMEL_TSADCC_PENCNT); |
| 145 | atmel_tsadcc_write(ATMEL_TSADCC_MR, reg); |
| 146 | atmel_tsadcc_write(ATMEL_TSADCC_IER, |
| 147 | ATMEL_TSADCC_EOC(3) | ATMEL_TSADCC_NOCNT); |
| 148 | atmel_tsadcc_write(ATMEL_TSADCC_TRGR, |
| 149 | ATMEL_TSADCC_TRGMOD_PERIOD | (0x0FFF << 16)); |
| 150 | |
| 151 | } else if (status & ATMEL_TSADCC_EOC(3)) { |
| 152 | /* Conversion finished */ |
| 153 | |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 154 | if (ts_dev->bufferedmeasure) { |
| 155 | /* Last measurement is always discarded, since it can |
| 156 | * be erroneous. |
| 157 | * Always report previous measurement */ |
| 158 | input_report_abs(input_dev, ABS_X, ts_dev->prev_absx); |
| 159 | input_report_abs(input_dev, ABS_Y, ts_dev->prev_absy); |
| 160 | input_report_key(input_dev, BTN_TOUCH, 1); |
| 161 | input_sync(input_dev); |
| 162 | } else |
| 163 | ts_dev->bufferedmeasure = 1; |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 164 | |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 165 | /* Now make new measurement */ |
| 166 | ts_dev->prev_absx = atmel_tsadcc_read(ATMEL_TSADCC_CDR3) << 10; |
| 167 | ts_dev->prev_absx /= atmel_tsadcc_read(ATMEL_TSADCC_CDR2); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 168 | |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 169 | ts_dev->prev_absy = atmel_tsadcc_read(ATMEL_TSADCC_CDR1) << 10; |
| 170 | ts_dev->prev_absy /= atmel_tsadcc_read(ATMEL_TSADCC_CDR0); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 171 | } |
| 172 | |
| 173 | return IRQ_HANDLED; |
| 174 | } |
| 175 | |
| 176 | /* |
| 177 | * The functions for inserting/removing us as a module. |
| 178 | */ |
| 179 | |
| 180 | static int __devinit atmel_tsadcc_probe(struct platform_device *pdev) |
| 181 | { |
| 182 | struct atmel_tsadcc *ts_dev; |
| 183 | struct input_dev *input_dev; |
| 184 | struct resource *res; |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 185 | struct at91_tsadcc_data *pdata = pdev->dev.platform_data; |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 186 | int err = 0; |
| 187 | unsigned int prsc; |
| 188 | unsigned int reg; |
| 189 | |
| 190 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 191 | if (!res) { |
| 192 | dev_err(&pdev->dev, "no mmio resource defined.\n"); |
| 193 | return -ENXIO; |
| 194 | } |
| 195 | |
| 196 | /* Allocate memory for device */ |
| 197 | ts_dev = kzalloc(sizeof(struct atmel_tsadcc), GFP_KERNEL); |
| 198 | if (!ts_dev) { |
| 199 | dev_err(&pdev->dev, "failed to allocate memory.\n"); |
| 200 | return -ENOMEM; |
| 201 | } |
| 202 | platform_set_drvdata(pdev, ts_dev); |
| 203 | |
| 204 | input_dev = input_allocate_device(); |
| 205 | if (!input_dev) { |
| 206 | dev_err(&pdev->dev, "failed to allocate input device.\n"); |
| 207 | err = -EBUSY; |
| 208 | goto err_free_mem; |
| 209 | } |
| 210 | |
| 211 | ts_dev->irq = platform_get_irq(pdev, 0); |
| 212 | if (ts_dev->irq < 0) { |
| 213 | dev_err(&pdev->dev, "no irq ID is designated.\n"); |
| 214 | err = -ENODEV; |
| 215 | goto err_free_dev; |
| 216 | } |
| 217 | |
Julia Lawall | 72398e4 | 2009-07-07 22:04:55 -0700 | [diff] [blame] | 218 | if (!request_mem_region(res->start, resource_size(res), |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 219 | "atmel tsadcc regs")) { |
| 220 | dev_err(&pdev->dev, "resources is unavailable.\n"); |
| 221 | err = -EBUSY; |
| 222 | goto err_free_dev; |
| 223 | } |
| 224 | |
Julia Lawall | 72398e4 | 2009-07-07 22:04:55 -0700 | [diff] [blame] | 225 | tsc_base = ioremap(res->start, resource_size(res)); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 226 | if (!tsc_base) { |
| 227 | dev_err(&pdev->dev, "failed to map registers.\n"); |
| 228 | err = -ENOMEM; |
| 229 | goto err_release_mem; |
| 230 | } |
| 231 | |
| 232 | err = request_irq(ts_dev->irq, atmel_tsadcc_interrupt, IRQF_DISABLED, |
| 233 | pdev->dev.driver->name, ts_dev); |
| 234 | if (err) { |
| 235 | dev_err(&pdev->dev, "failed to allocate irq.\n"); |
| 236 | goto err_unmap_regs; |
| 237 | } |
| 238 | |
| 239 | ts_dev->clk = clk_get(&pdev->dev, "tsc_clk"); |
| 240 | if (IS_ERR(ts_dev->clk)) { |
| 241 | dev_err(&pdev->dev, "failed to get ts_clk\n"); |
| 242 | err = PTR_ERR(ts_dev->clk); |
| 243 | goto err_free_irq; |
| 244 | } |
| 245 | |
| 246 | ts_dev->input = input_dev; |
Dan Liang | d8c1f31 | 2008-08-14 22:36:41 -0400 | [diff] [blame] | 247 | ts_dev->bufferedmeasure = 0; |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 248 | |
| 249 | snprintf(ts_dev->phys, sizeof(ts_dev->phys), |
Kay Sievers | 4e8718a | 2009-01-29 22:56:08 -0800 | [diff] [blame] | 250 | "%s/input0", dev_name(&pdev->dev)); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 251 | |
| 252 | input_dev->name = "atmel touch screen controller"; |
| 253 | input_dev->phys = ts_dev->phys; |
| 254 | input_dev->dev.parent = &pdev->dev; |
| 255 | |
Nicolas Ferre | ab9122c | 2009-11-19 09:28:25 -0800 | [diff] [blame] | 256 | __set_bit(EV_ABS, input_dev->evbit); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 257 | input_set_abs_params(input_dev, ABS_X, 0, 0x3FF, 0, 0); |
| 258 | input_set_abs_params(input_dev, ABS_Y, 0, 0x3FF, 0, 0); |
| 259 | |
Nicolas Ferre | ab9122c | 2009-11-19 09:28:25 -0800 | [diff] [blame] | 260 | input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
| 261 | |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 262 | /* clk_enable() always returns 0, no need to check it */ |
| 263 | clk_enable(ts_dev->clk); |
| 264 | |
| 265 | prsc = clk_get_rate(ts_dev->clk); |
| 266 | dev_info(&pdev->dev, "Master clock is set at: %d Hz\n", prsc); |
| 267 | |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 268 | if (!pdata) |
| 269 | goto err_fail; |
| 270 | |
| 271 | if (!pdata->adc_clock) |
| 272 | pdata->adc_clock = ADC_DEFAULT_CLOCK; |
| 273 | |
| 274 | prsc = (prsc / (2 * pdata->adc_clock)) - 1; |
| 275 | |
| 276 | /* saturate if this value is too high */ |
| 277 | if (cpu_is_at91sam9rl()) { |
| 278 | if (prsc > PRESCALER_VAL(ATMEL_TSADCC_PRESCAL)) |
| 279 | prsc = PRESCALER_VAL(ATMEL_TSADCC_PRESCAL); |
| 280 | } else { |
| 281 | if (prsc > PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL)) |
| 282 | prsc = PRESCALER_VAL(ATMEL_TSADCC_EPRESCAL); |
| 283 | } |
| 284 | |
| 285 | dev_info(&pdev->dev, "Prescaler is set at: %d\n", prsc); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 286 | |
| 287 | reg = ATMEL_TSADCC_TSAMOD_TS_ONLY_MODE | |
| 288 | ((0x00 << 5) & ATMEL_TSADCC_SLEEP) | /* Normal Mode */ |
| 289 | ((0x01 << 6) & ATMEL_TSADCC_PENDET) | /* Enable Pen Detect */ |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 290 | (prsc << 8) | |
| 291 | ((0x26 << 16) & ATMEL_TSADCC_STARTUP) | |
| 292 | ((pdata->pendet_debounce << 28) & ATMEL_TSADCC_PENDBC); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 293 | |
| 294 | atmel_tsadcc_write(ATMEL_TSADCC_CR, ATMEL_TSADCC_SWRST); |
| 295 | atmel_tsadcc_write(ATMEL_TSADCC_MR, reg); |
| 296 | atmel_tsadcc_write(ATMEL_TSADCC_TRGR, ATMEL_TSADCC_TRGMOD_NONE); |
Nicolas Ferre | 970435a | 2009-11-19 09:29:32 -0800 | [diff] [blame] | 297 | atmel_tsadcc_write(ATMEL_TSADCC_TSR, |
| 298 | (pdata->ts_sample_hold_time << 24) & ATMEL_TSADCC_TSSHTIM); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 299 | |
| 300 | atmel_tsadcc_read(ATMEL_TSADCC_SR); |
| 301 | atmel_tsadcc_write(ATMEL_TSADCC_IER, ATMEL_TSADCC_PENCNT); |
| 302 | |
| 303 | /* All went ok, so register to the input system */ |
| 304 | err = input_register_device(input_dev); |
| 305 | if (err) |
| 306 | goto err_fail; |
| 307 | |
| 308 | return 0; |
| 309 | |
| 310 | err_fail: |
| 311 | clk_disable(ts_dev->clk); |
| 312 | clk_put(ts_dev->clk); |
| 313 | err_free_irq: |
| 314 | free_irq(ts_dev->irq, ts_dev); |
| 315 | err_unmap_regs: |
| 316 | iounmap(tsc_base); |
| 317 | err_release_mem: |
Julia Lawall | 72398e4 | 2009-07-07 22:04:55 -0700 | [diff] [blame] | 318 | release_mem_region(res->start, resource_size(res)); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 319 | err_free_dev: |
Julia Lawall | 215ef98 | 2011-05-14 22:22:38 -0700 | [diff] [blame] | 320 | input_free_device(input_dev); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 321 | err_free_mem: |
| 322 | kfree(ts_dev); |
| 323 | return err; |
| 324 | } |
| 325 | |
| 326 | static int __devexit atmel_tsadcc_remove(struct platform_device *pdev) |
| 327 | { |
| 328 | struct atmel_tsadcc *ts_dev = dev_get_drvdata(&pdev->dev); |
| 329 | struct resource *res; |
| 330 | |
| 331 | free_irq(ts_dev->irq, ts_dev); |
| 332 | |
| 333 | input_unregister_device(ts_dev->input); |
| 334 | |
| 335 | res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 336 | iounmap(tsc_base); |
Julia Lawall | 72398e4 | 2009-07-07 22:04:55 -0700 | [diff] [blame] | 337 | release_mem_region(res->start, resource_size(res)); |
Dan Liang | 72d18a7 | 2008-07-23 21:27:25 -0400 | [diff] [blame] | 338 | |
| 339 | clk_disable(ts_dev->clk); |
| 340 | clk_put(ts_dev->clk); |
| 341 | |
| 342 | kfree(ts_dev); |
| 343 | |
| 344 | return 0; |
| 345 | } |
| 346 | |
| 347 | static struct platform_driver atmel_tsadcc_driver = { |
| 348 | .probe = atmel_tsadcc_probe, |
| 349 | .remove = __devexit_p(atmel_tsadcc_remove), |
| 350 | .driver = { |
| 351 | .name = "atmel_tsadcc", |
| 352 | }, |
| 353 | }; |
| 354 | |
| 355 | static int __init atmel_tsadcc_init(void) |
| 356 | { |
| 357 | return platform_driver_register(&atmel_tsadcc_driver); |
| 358 | } |
| 359 | |
| 360 | static void __exit atmel_tsadcc_exit(void) |
| 361 | { |
| 362 | platform_driver_unregister(&atmel_tsadcc_driver); |
| 363 | } |
| 364 | |
| 365 | module_init(atmel_tsadcc_init); |
| 366 | module_exit(atmel_tsadcc_exit); |
| 367 | |
| 368 | |
| 369 | MODULE_LICENSE("GPL"); |
| 370 | MODULE_DESCRIPTION("Atmel TouchScreen Driver"); |
| 371 | MODULE_AUTHOR("Dan Liang <dan.liang@atmel.com>"); |
| 372 | |