Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1 | /* |
| 2 | * OMAP4 Bandgap temperature sensor driver |
| 3 | * |
| 4 | * Copyright (C) 2011-2012 Texas Instruments Incorporated - http://www.ti.com/ |
| 5 | * Author: J Keerthy <j-keerthy@ti.com> |
| 6 | * Author: Moiz Sonasath <m-sonasath@ti.com> |
| 7 | * Couple of fixes, DT and MFD adaptation: |
| 8 | * Eduardo Valentin <eduardo.valentin@ti.com> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 2 as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA |
| 22 | * 02110-1301 USA |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/export.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/interrupt.h> |
| 31 | #include <linux/clk.h> |
| 32 | #include <linux/gpio.h> |
| 33 | #include <linux/platform_device.h> |
| 34 | #include <linux/err.h> |
| 35 | #include <linux/types.h> |
| 36 | #include <linux/mutex.h> |
| 37 | #include <linux/reboot.h> |
| 38 | #include <linux/of_device.h> |
| 39 | #include <linux/of_platform.h> |
| 40 | #include <linux/of_irq.h> |
Eduardo Valentin | 2aeeb8a | 2012-11-13 14:10:00 -0400 | [diff] [blame] | 41 | #include <linux/io.h> |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 42 | |
| 43 | #include "omap-bandgap.h" |
| 44 | |
Eduardo Valentin | 8abbe71 | 2013-03-15 09:00:05 -0400 | [diff] [blame] | 45 | /*** Helper functions to access registers and their bitfields ***/ |
| 46 | |
Eduardo Valentin | 9c468aa | 2013-03-15 08:59:56 -0400 | [diff] [blame] | 47 | /** |
| 48 | * omap_bandgap_readl() - simple read helper function |
| 49 | * @bg_ptr: pointer to omap_bandgap structure |
| 50 | * @reg: desired register (offset) to be read |
| 51 | * |
| 52 | * Helper function to read bandgap registers. It uses the io remapped area. |
| 53 | * Returns the register value. |
| 54 | */ |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 55 | static u32 omap_bandgap_readl(struct omap_bandgap *bg_ptr, u32 reg) |
| 56 | { |
| 57 | return readl(bg_ptr->base + reg); |
| 58 | } |
| 59 | |
Eduardo Valentin | 9c468aa | 2013-03-15 08:59:56 -0400 | [diff] [blame] | 60 | /** |
| 61 | * omap_bandgap_writel() - simple write helper function |
| 62 | * @bg_ptr: pointer to omap_bandgap structure |
| 63 | * @val: desired register value to be written |
| 64 | * @reg: desired register (offset) to be written |
| 65 | * |
| 66 | * Helper function to write bandgap registers. It uses the io remapped area. |
| 67 | */ |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 68 | static void omap_bandgap_writel(struct omap_bandgap *bg_ptr, u32 val, u32 reg) |
| 69 | { |
| 70 | writel(val, bg_ptr->base + reg); |
| 71 | } |
| 72 | |
Eduardo Valentin | 9c468aa | 2013-03-15 08:59:56 -0400 | [diff] [blame] | 73 | /** |
| 74 | * DOC: macro to update bits. |
| 75 | * |
| 76 | * RMW_BITS() - used to read, modify and update bandgap bitfields. |
| 77 | * The value passed will be shifted. |
| 78 | */ |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 79 | #define RMW_BITS(bg_ptr, id, reg, mask, val) \ |
| 80 | do { \ |
| 81 | struct temp_sensor_registers *t; \ |
| 82 | u32 r; \ |
| 83 | \ |
| 84 | t = bg_ptr->conf->sensors[(id)].registers; \ |
| 85 | r = omap_bandgap_readl(bg_ptr, t->reg); \ |
| 86 | r &= ~t->mask; \ |
| 87 | r |= (val) << __ffs(t->mask); \ |
| 88 | omap_bandgap_writel(bg_ptr, r, t->reg); \ |
| 89 | } while (0) |
| 90 | |
Eduardo Valentin | 6ab5240 | 2013-03-15 09:00:06 -0400 | [diff] [blame^] | 91 | /*** Basic helper functions ***/ |
| 92 | |
Eduardo Valentin | 7a556e6 | 2013-03-15 08:59:58 -0400 | [diff] [blame] | 93 | /** |
| 94 | * omap_bandgap_power() - controls the power state of a bandgap device |
| 95 | * @bg_ptr: pointer to omap_bandgap structure |
| 96 | * @on: desired power state (1 - on, 0 - off) |
| 97 | * |
| 98 | * Used to power on/off a bandgap device instance. Only used on those |
| 99 | * that features tempsoff bit. |
| 100 | */ |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 101 | static int omap_bandgap_power(struct omap_bandgap *bg_ptr, bool on) |
| 102 | { |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 103 | int i; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 104 | |
| 105 | if (!OMAP_BANDGAP_HAS(bg_ptr, POWER_SWITCH)) |
Eduardo Valentin | 3d84e52 | 2013-03-15 08:59:57 -0400 | [diff] [blame] | 106 | goto exit; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 107 | |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 108 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 109 | /* active on 0 */ |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 110 | RMW_BITS(bg_ptr, i, temp_sensor_ctrl, bgap_tempsoff_mask, !on); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 111 | |
Eduardo Valentin | 3d84e52 | 2013-03-15 08:59:57 -0400 | [diff] [blame] | 112 | exit: |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 113 | return 0; |
| 114 | } |
| 115 | |
Eduardo Valentin | 4a6554e | 2013-03-15 08:59:59 -0400 | [diff] [blame] | 116 | /** |
| 117 | * omap_bandgap_read_temp() - helper function to read sensor temperature |
| 118 | * @bg_ptr: pointer to omap_bandgap structure |
| 119 | * @id: bandgap sensor id |
| 120 | * |
| 121 | * Function to concentrate the steps to read sensor temperature register. |
| 122 | * This function is desired because, depending on bandgap device version, |
| 123 | * it might be needed to freeze the bandgap state machine, before fetching |
| 124 | * the register value. |
| 125 | */ |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 126 | static u32 omap_bandgap_read_temp(struct omap_bandgap *bg_ptr, int id) |
| 127 | { |
| 128 | struct temp_sensor_registers *tsr; |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 129 | u32 temp, reg; |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 130 | |
| 131 | tsr = bg_ptr->conf->sensors[id].registers; |
| 132 | reg = tsr->temp_sensor_ctrl; |
| 133 | |
| 134 | if (OMAP_BANDGAP_HAS(bg_ptr, FREEZE_BIT)) { |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 135 | RMW_BITS(bg_ptr, id, bgap_mask_ctrl, mask_freeze_mask, 1); |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 136 | /* |
| 137 | * In case we cannot read from cur_dtemp / dtemp_0, |
| 138 | * then we read from the last valid temp read |
| 139 | */ |
| 140 | reg = tsr->ctrl_dtemp_1; |
| 141 | } |
| 142 | |
| 143 | /* read temperature */ |
| 144 | temp = omap_bandgap_readl(bg_ptr, reg); |
| 145 | temp &= tsr->bgap_dtemp_mask; |
| 146 | |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 147 | if (OMAP_BANDGAP_HAS(bg_ptr, FREEZE_BIT)) |
| 148 | RMW_BITS(bg_ptr, id, bgap_mask_ctrl, mask_freeze_mask, 0); |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 149 | |
| 150 | return temp; |
| 151 | } |
| 152 | |
Eduardo Valentin | ee07d55 | 2013-03-15 09:00:01 -0400 | [diff] [blame] | 153 | /** |
| 154 | * omap_bandgap_talert_irq_handler() - handles Temperature alert IRQs |
| 155 | * @irq: IRQ number |
| 156 | * @data: private data (struct omap_bandgap *) |
| 157 | * |
| 158 | * This is the Talert handler. Use it only if bandgap device features |
| 159 | * HAS(TALERT). This handler goes over all sensors and checks their |
| 160 | * conditions and acts accordingly. In case there are events pending, |
| 161 | * it will reset the event mask to wait for the opposite event (next event). |
| 162 | * Every time there is a new event, it will be reported to thermal layer. |
| 163 | */ |
Eduardo Valentin | f230427 | 2013-03-15 09:00:00 -0400 | [diff] [blame] | 164 | static irqreturn_t omap_bandgap_talert_irq_handler(int irq, void *data) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 165 | { |
| 166 | struct omap_bandgap *bg_ptr = data; |
| 167 | struct temp_sensor_registers *tsr; |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 168 | u32 t_hot = 0, t_cold = 0, ctrl; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 169 | int i; |
| 170 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 171 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 172 | tsr = bg_ptr->conf->sensors[i].registers; |
Eduardo Valentin | e555c95 | 2013-03-15 09:00:04 -0400 | [diff] [blame] | 173 | ctrl = omap_bandgap_readl(bg_ptr, tsr->bgap_status); |
| 174 | |
| 175 | /* Read the status of t_hot */ |
| 176 | t_hot = ctrl & tsr->status_hot_mask; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 177 | |
| 178 | /* Read the status of t_cold */ |
Eduardo Valentin | e555c95 | 2013-03-15 09:00:04 -0400 | [diff] [blame] | 179 | t_cold = ctrl & tsr->status_cold_mask; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 180 | |
| 181 | if (!t_cold && !t_hot) |
| 182 | continue; |
| 183 | |
| 184 | ctrl = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl); |
| 185 | /* |
| 186 | * One TALERT interrupt: Two sources |
| 187 | * If the interrupt is due to t_hot then mask t_hot and |
| 188 | * and unmask t_cold else mask t_cold and unmask t_hot |
| 189 | */ |
| 190 | if (t_hot) { |
| 191 | ctrl &= ~tsr->mask_hot_mask; |
| 192 | ctrl |= tsr->mask_cold_mask; |
| 193 | } else if (t_cold) { |
| 194 | ctrl &= ~tsr->mask_cold_mask; |
| 195 | ctrl |= tsr->mask_hot_mask; |
| 196 | } |
| 197 | |
| 198 | omap_bandgap_writel(bg_ptr, ctrl, tsr->bgap_mask_ctrl); |
| 199 | |
Eduardo Valentin | 71e303f | 2012-11-13 14:10:03 -0400 | [diff] [blame] | 200 | dev_dbg(bg_ptr->dev, |
| 201 | "%s: IRQ from %s sensor: hotevent %d coldevent %d\n", |
| 202 | __func__, bg_ptr->conf->sensors[i].domain, |
| 203 | t_hot, t_cold); |
| 204 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 205 | /* report temperature to whom may concern */ |
| 206 | if (bg_ptr->conf->report_temperature) |
| 207 | bg_ptr->conf->report_temperature(bg_ptr, i); |
| 208 | } |
| 209 | |
| 210 | return IRQ_HANDLED; |
| 211 | } |
| 212 | |
Eduardo Valentin | 79857cd2 | 2013-03-15 09:00:02 -0400 | [diff] [blame] | 213 | /** |
| 214 | * omap_bandgap_tshut_irq_handler() - handles Temperature shutdown signal |
| 215 | * @irq: IRQ number |
| 216 | * @data: private data (unused) |
| 217 | * |
| 218 | * This is the Tshut handler. Use it only if bandgap device features |
| 219 | * HAS(TSHUT). If any sensor fires the Tshut signal, we simply shutdown |
| 220 | * the system. |
| 221 | */ |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 222 | static irqreturn_t omap_bandgap_tshut_irq_handler(int irq, void *data) |
| 223 | { |
Ruslan Ruslichenko | b3bf0e9 | 2013-02-26 18:53:24 -0400 | [diff] [blame] | 224 | pr_emerg("%s: TSHUT temperature reached. Needs shut down...\n", |
| 225 | __func__); |
| 226 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 227 | orderly_poweroff(true); |
| 228 | |
| 229 | return IRQ_HANDLED; |
| 230 | } |
| 231 | |
| 232 | static |
| 233 | int adc_to_temp_conversion(struct omap_bandgap *bg_ptr, int id, int adc_val, |
| 234 | int *t) |
| 235 | { |
| 236 | struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data; |
| 237 | |
| 238 | /* look up for temperature in the table and return the temperature */ |
| 239 | if (adc_val < ts_data->adc_start_val || adc_val > ts_data->adc_end_val) |
| 240 | return -ERANGE; |
| 241 | |
Eduardo Valentin | c8a8f84 | 2013-02-26 18:53:36 -0400 | [diff] [blame] | 242 | *t = bg_ptr->conf->conv_table[adc_val - ts_data->adc_start_val]; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
| 247 | static int temp_to_adc_conversion(long temp, struct omap_bandgap *bg_ptr, int i, |
| 248 | int *adc) |
| 249 | { |
| 250 | struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[i].ts_data; |
Eduardo Valentin | c8a8f84 | 2013-02-26 18:53:36 -0400 | [diff] [blame] | 251 | const int *conv_table = bg_ptr->conf->conv_table; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 252 | int high, low, mid; |
| 253 | |
| 254 | low = 0; |
| 255 | high = ts_data->adc_end_val - ts_data->adc_start_val; |
| 256 | mid = (high + low) / 2; |
| 257 | |
Eduardo Valentin | c8a8f84 | 2013-02-26 18:53:36 -0400 | [diff] [blame] | 258 | if (temp < conv_table[low] || temp > conv_table[high]) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 259 | return -EINVAL; |
| 260 | |
| 261 | while (low < high) { |
Eduardo Valentin | c8a8f84 | 2013-02-26 18:53:36 -0400 | [diff] [blame] | 262 | if (temp < conv_table[mid]) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 263 | high = mid - 1; |
| 264 | else |
| 265 | low = mid + 1; |
| 266 | mid = (low + high) / 2; |
| 267 | } |
| 268 | |
| 269 | *adc = ts_data->adc_start_val + low; |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
| 274 | /* Talert masks. Call it only if HAS(TALERT) is set */ |
| 275 | static int temp_sensor_unmask_interrupts(struct omap_bandgap *bg_ptr, int id, |
| 276 | u32 t_hot, u32 t_cold) |
| 277 | { |
| 278 | struct temp_sensor_registers *tsr; |
| 279 | u32 temp, reg_val; |
| 280 | |
| 281 | /* Read the current on die temperature */ |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 282 | temp = omap_bandgap_read_temp(bg_ptr, id); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 283 | |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 284 | tsr = bg_ptr->conf->sensors[id].registers; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 285 | reg_val = omap_bandgap_readl(bg_ptr, tsr->bgap_mask_ctrl); |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 286 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 287 | if (temp < t_hot) |
| 288 | reg_val |= tsr->mask_hot_mask; |
| 289 | else |
| 290 | reg_val &= ~tsr->mask_hot_mask; |
| 291 | |
| 292 | if (t_cold < temp) |
| 293 | reg_val |= tsr->mask_cold_mask; |
| 294 | else |
| 295 | reg_val &= ~tsr->mask_cold_mask; |
| 296 | omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_mask_ctrl); |
| 297 | |
| 298 | return 0; |
| 299 | } |
| 300 | |
| 301 | static |
| 302 | int add_hyst(int adc_val, int hyst_val, struct omap_bandgap *bg_ptr, int i, |
| 303 | u32 *sum) |
| 304 | { |
| 305 | int temp, ret; |
| 306 | |
| 307 | ret = adc_to_temp_conversion(bg_ptr, i, adc_val, &temp); |
| 308 | if (ret < 0) |
| 309 | return ret; |
| 310 | |
| 311 | temp += hyst_val; |
| 312 | |
| 313 | return temp_to_adc_conversion(temp, bg_ptr, i, sum); |
| 314 | } |
| 315 | |
| 316 | /* Talert Thot threshold. Call it only if HAS(TALERT) is set */ |
| 317 | static |
| 318 | int temp_sensor_configure_thot(struct omap_bandgap *bg_ptr, int id, int t_hot) |
| 319 | { |
| 320 | struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data; |
| 321 | struct temp_sensor_registers *tsr; |
| 322 | u32 thresh_val, reg_val; |
| 323 | int cold, err = 0; |
| 324 | |
| 325 | tsr = bg_ptr->conf->sensors[id].registers; |
| 326 | |
| 327 | /* obtain the T cold value */ |
| 328 | thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); |
| 329 | cold = (thresh_val & tsr->threshold_tcold_mask) >> |
| 330 | __ffs(tsr->threshold_tcold_mask); |
| 331 | if (t_hot <= cold) { |
| 332 | /* change the t_cold to t_hot - 5000 millidegrees */ |
| 333 | err |= add_hyst(t_hot, -ts_data->hyst_val, bg_ptr, id, &cold); |
| 334 | /* write the new t_cold value */ |
| 335 | reg_val = thresh_val & (~tsr->threshold_tcold_mask); |
| 336 | reg_val |= cold << __ffs(tsr->threshold_tcold_mask); |
| 337 | omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); |
| 338 | thresh_val = reg_val; |
| 339 | } |
| 340 | |
| 341 | /* write the new t_hot value */ |
| 342 | reg_val = thresh_val & ~tsr->threshold_thot_mask; |
| 343 | reg_val |= (t_hot << __ffs(tsr->threshold_thot_mask)); |
| 344 | omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); |
| 345 | if (err) { |
| 346 | dev_err(bg_ptr->dev, "failed to reprogram thot threshold\n"); |
| 347 | return -EIO; |
| 348 | } |
| 349 | |
| 350 | return temp_sensor_unmask_interrupts(bg_ptr, id, t_hot, cold); |
| 351 | } |
| 352 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 353 | /* Talert Tcold threshold. Call it only if HAS(TALERT) is set */ |
| 354 | static |
| 355 | int temp_sensor_configure_tcold(struct omap_bandgap *bg_ptr, int id, |
| 356 | int t_cold) |
| 357 | { |
| 358 | struct temp_sensor_data *ts_data = bg_ptr->conf->sensors[id].ts_data; |
| 359 | struct temp_sensor_registers *tsr; |
| 360 | u32 thresh_val, reg_val; |
| 361 | int hot, err = 0; |
| 362 | |
| 363 | tsr = bg_ptr->conf->sensors[id].registers; |
| 364 | /* obtain the T cold value */ |
| 365 | thresh_val = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); |
| 366 | hot = (thresh_val & tsr->threshold_thot_mask) >> |
| 367 | __ffs(tsr->threshold_thot_mask); |
| 368 | |
| 369 | if (t_cold >= hot) { |
| 370 | /* change the t_hot to t_cold + 5000 millidegrees */ |
| 371 | err |= add_hyst(t_cold, ts_data->hyst_val, bg_ptr, id, &hot); |
| 372 | /* write the new t_hot value */ |
| 373 | reg_val = thresh_val & (~tsr->threshold_thot_mask); |
| 374 | reg_val |= hot << __ffs(tsr->threshold_thot_mask); |
| 375 | omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); |
| 376 | thresh_val = reg_val; |
| 377 | } |
| 378 | |
| 379 | /* write the new t_cold value */ |
| 380 | reg_val = thresh_val & ~tsr->threshold_tcold_mask; |
| 381 | reg_val |= (t_cold << __ffs(tsr->threshold_tcold_mask)); |
| 382 | omap_bandgap_writel(bg_ptr, reg_val, tsr->bgap_threshold); |
| 383 | if (err) { |
| 384 | dev_err(bg_ptr->dev, "failed to reprogram tcold threshold\n"); |
| 385 | return -EIO; |
| 386 | } |
| 387 | |
| 388 | return temp_sensor_unmask_interrupts(bg_ptr, id, hot, t_cold); |
| 389 | } |
| 390 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 391 | #define bandgap_is_valid(b) \ |
| 392 | (!IS_ERR_OR_NULL(b)) |
| 393 | #define bandgap_is_valid_sensor_id(b, i) \ |
| 394 | ((i) >= 0 && (i) < (b)->conf->sensor_count) |
| 395 | static inline int omap_bandgap_validate(struct omap_bandgap *bg_ptr, int id) |
| 396 | { |
| 397 | if (!bandgap_is_valid(bg_ptr)) { |
| 398 | pr_err("%s: invalid bandgap pointer\n", __func__); |
| 399 | return -EINVAL; |
| 400 | } |
| 401 | |
| 402 | if (!bandgap_is_valid_sensor_id(bg_ptr, id)) { |
| 403 | dev_err(bg_ptr->dev, "%s: sensor id out of range (%d)\n", |
| 404 | __func__, id); |
| 405 | return -ERANGE; |
| 406 | } |
| 407 | |
| 408 | return 0; |
| 409 | } |
| 410 | |
| 411 | /* Exposed APIs */ |
| 412 | /** |
| 413 | * omap_bandgap_read_thot() - reads sensor current thot |
| 414 | * @bg_ptr - pointer to bandgap instance |
| 415 | * @id - sensor id |
| 416 | * @thot - resulting current thot value |
| 417 | * |
| 418 | * returns 0 on success or the proper error code |
| 419 | */ |
| 420 | int omap_bandgap_read_thot(struct omap_bandgap *bg_ptr, int id, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 421 | int *thot) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 422 | { |
| 423 | struct temp_sensor_registers *tsr; |
| 424 | u32 temp; |
| 425 | int ret; |
| 426 | |
| 427 | ret = omap_bandgap_validate(bg_ptr, id); |
| 428 | if (ret) |
| 429 | return ret; |
| 430 | |
| 431 | if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) |
| 432 | return -ENOTSUPP; |
| 433 | |
| 434 | tsr = bg_ptr->conf->sensors[id].registers; |
| 435 | temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); |
| 436 | temp = (temp & tsr->threshold_thot_mask) >> |
| 437 | __ffs(tsr->threshold_thot_mask); |
| 438 | ret |= adc_to_temp_conversion(bg_ptr, id, temp, &temp); |
| 439 | if (ret) { |
| 440 | dev_err(bg_ptr->dev, "failed to read thot\n"); |
| 441 | return -EIO; |
| 442 | } |
| 443 | |
| 444 | *thot = temp; |
| 445 | |
| 446 | return 0; |
| 447 | } |
| 448 | |
| 449 | /** |
| 450 | * omap_bandgap_write_thot() - sets sensor current thot |
| 451 | * @bg_ptr - pointer to bandgap instance |
| 452 | * @id - sensor id |
| 453 | * @val - desired thot value |
| 454 | * |
| 455 | * returns 0 on success or the proper error code |
| 456 | */ |
| 457 | int omap_bandgap_write_thot(struct omap_bandgap *bg_ptr, int id, int val) |
| 458 | { |
| 459 | struct temp_sensor_data *ts_data; |
| 460 | struct temp_sensor_registers *tsr; |
| 461 | u32 t_hot; |
| 462 | int ret; |
| 463 | |
| 464 | ret = omap_bandgap_validate(bg_ptr, id); |
| 465 | if (ret) |
| 466 | return ret; |
| 467 | |
| 468 | if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) |
| 469 | return -ENOTSUPP; |
| 470 | |
| 471 | ts_data = bg_ptr->conf->sensors[id].ts_data; |
| 472 | tsr = bg_ptr->conf->sensors[id].registers; |
| 473 | |
| 474 | if (val < ts_data->min_temp + ts_data->hyst_val) |
| 475 | return -EINVAL; |
| 476 | ret = temp_to_adc_conversion(val, bg_ptr, id, &t_hot); |
| 477 | if (ret < 0) |
| 478 | return ret; |
| 479 | |
| 480 | mutex_lock(&bg_ptr->bg_mutex); |
| 481 | temp_sensor_configure_thot(bg_ptr, id, t_hot); |
| 482 | mutex_unlock(&bg_ptr->bg_mutex); |
| 483 | |
| 484 | return 0; |
| 485 | } |
| 486 | |
| 487 | /** |
| 488 | * omap_bandgap_read_tcold() - reads sensor current tcold |
| 489 | * @bg_ptr - pointer to bandgap instance |
| 490 | * @id - sensor id |
| 491 | * @tcold - resulting current tcold value |
| 492 | * |
| 493 | * returns 0 on success or the proper error code |
| 494 | */ |
| 495 | int omap_bandgap_read_tcold(struct omap_bandgap *bg_ptr, int id, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 496 | int *tcold) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 497 | { |
| 498 | struct temp_sensor_registers *tsr; |
| 499 | u32 temp; |
| 500 | int ret; |
| 501 | |
| 502 | ret = omap_bandgap_validate(bg_ptr, id); |
| 503 | if (ret) |
| 504 | return ret; |
| 505 | |
| 506 | if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) |
| 507 | return -ENOTSUPP; |
| 508 | |
| 509 | tsr = bg_ptr->conf->sensors[id].registers; |
| 510 | temp = omap_bandgap_readl(bg_ptr, tsr->bgap_threshold); |
| 511 | temp = (temp & tsr->threshold_tcold_mask) |
| 512 | >> __ffs(tsr->threshold_tcold_mask); |
| 513 | ret |= adc_to_temp_conversion(bg_ptr, id, temp, &temp); |
| 514 | if (ret) |
| 515 | return -EIO; |
| 516 | |
| 517 | *tcold = temp; |
| 518 | |
| 519 | return 0; |
| 520 | } |
| 521 | |
| 522 | /** |
| 523 | * omap_bandgap_write_tcold() - sets the sensor tcold |
| 524 | * @bg_ptr - pointer to bandgap instance |
| 525 | * @id - sensor id |
| 526 | * @val - desired tcold value |
| 527 | * |
| 528 | * returns 0 on success or the proper error code |
| 529 | */ |
| 530 | int omap_bandgap_write_tcold(struct omap_bandgap *bg_ptr, int id, int val) |
| 531 | { |
| 532 | struct temp_sensor_data *ts_data; |
| 533 | struct temp_sensor_registers *tsr; |
| 534 | u32 t_cold; |
| 535 | int ret; |
| 536 | |
| 537 | ret = omap_bandgap_validate(bg_ptr, id); |
| 538 | if (ret) |
| 539 | return ret; |
| 540 | |
| 541 | if (!OMAP_BANDGAP_HAS(bg_ptr, TALERT)) |
| 542 | return -ENOTSUPP; |
| 543 | |
| 544 | ts_data = bg_ptr->conf->sensors[id].ts_data; |
| 545 | tsr = bg_ptr->conf->sensors[id].registers; |
| 546 | if (val > ts_data->max_temp + ts_data->hyst_val) |
| 547 | return -EINVAL; |
| 548 | |
| 549 | ret = temp_to_adc_conversion(val, bg_ptr, id, &t_cold); |
| 550 | if (ret < 0) |
| 551 | return ret; |
| 552 | |
| 553 | mutex_lock(&bg_ptr->bg_mutex); |
| 554 | temp_sensor_configure_tcold(bg_ptr, id, t_cold); |
| 555 | mutex_unlock(&bg_ptr->bg_mutex); |
| 556 | |
| 557 | return 0; |
| 558 | } |
| 559 | |
| 560 | /** |
| 561 | * omap_bandgap_read_update_interval() - read the sensor update interval |
| 562 | * @bg_ptr - pointer to bandgap instance |
| 563 | * @id - sensor id |
| 564 | * @interval - resulting update interval in miliseconds |
| 565 | * |
| 566 | * returns 0 on success or the proper error code |
| 567 | */ |
| 568 | int omap_bandgap_read_update_interval(struct omap_bandgap *bg_ptr, int id, |
| 569 | int *interval) |
| 570 | { |
| 571 | struct temp_sensor_registers *tsr; |
| 572 | u32 time; |
| 573 | int ret; |
| 574 | |
| 575 | ret = omap_bandgap_validate(bg_ptr, id); |
| 576 | if (ret) |
| 577 | return ret; |
| 578 | |
| 579 | if (!OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 580 | return -ENOTSUPP; |
| 581 | |
| 582 | tsr = bg_ptr->conf->sensors[id].registers; |
| 583 | time = omap_bandgap_readl(bg_ptr, tsr->bgap_counter); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 584 | time = (time & tsr->counter_mask) >> __ffs(tsr->counter_mask); |
| 585 | time = time * 1000 / bg_ptr->clk_rate; |
| 586 | |
| 587 | *interval = time; |
| 588 | |
| 589 | return 0; |
| 590 | } |
| 591 | |
| 592 | /** |
| 593 | * omap_bandgap_write_update_interval() - set the update interval |
| 594 | * @bg_ptr - pointer to bandgap instance |
| 595 | * @id - sensor id |
| 596 | * @interval - desired update interval in miliseconds |
| 597 | * |
| 598 | * returns 0 on success or the proper error code |
| 599 | */ |
| 600 | int omap_bandgap_write_update_interval(struct omap_bandgap *bg_ptr, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 601 | int id, u32 interval) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 602 | { |
| 603 | int ret = omap_bandgap_validate(bg_ptr, id); |
| 604 | if (ret) |
| 605 | return ret; |
| 606 | |
| 607 | if (!OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 608 | return -ENOTSUPP; |
| 609 | |
| 610 | interval = interval * bg_ptr->clk_rate / 1000; |
| 611 | mutex_lock(&bg_ptr->bg_mutex); |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 612 | RMW_BITS(bg_ptr, id, bgap_counter, counter_mask, interval); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 613 | mutex_unlock(&bg_ptr->bg_mutex); |
| 614 | |
| 615 | return 0; |
| 616 | } |
| 617 | |
| 618 | /** |
| 619 | * omap_bandgap_read_temperature() - report current temperature |
| 620 | * @bg_ptr - pointer to bandgap instance |
| 621 | * @id - sensor id |
| 622 | * @temperature - resulting temperature |
| 623 | * |
| 624 | * returns 0 on success or the proper error code |
| 625 | */ |
| 626 | int omap_bandgap_read_temperature(struct omap_bandgap *bg_ptr, int id, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 627 | int *temperature) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 628 | { |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 629 | u32 temp; |
| 630 | int ret; |
| 631 | |
| 632 | ret = omap_bandgap_validate(bg_ptr, id); |
| 633 | if (ret) |
| 634 | return ret; |
| 635 | |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 636 | mutex_lock(&bg_ptr->bg_mutex); |
| 637 | temp = omap_bandgap_read_temp(bg_ptr, id); |
| 638 | mutex_unlock(&bg_ptr->bg_mutex); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 639 | |
| 640 | ret |= adc_to_temp_conversion(bg_ptr, id, temp, &temp); |
| 641 | if (ret) |
| 642 | return -EIO; |
| 643 | |
| 644 | *temperature = temp; |
| 645 | |
| 646 | return 0; |
| 647 | } |
| 648 | |
| 649 | /** |
| 650 | * omap_bandgap_set_sensor_data() - helper function to store thermal |
| 651 | * framework related data. |
| 652 | * @bg_ptr - pointer to bandgap instance |
| 653 | * @id - sensor id |
| 654 | * @data - thermal framework related data to be stored |
| 655 | * |
| 656 | * returns 0 on success or the proper error code |
| 657 | */ |
| 658 | int omap_bandgap_set_sensor_data(struct omap_bandgap *bg_ptr, int id, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 659 | void *data) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 660 | { |
| 661 | int ret = omap_bandgap_validate(bg_ptr, id); |
| 662 | if (ret) |
| 663 | return ret; |
| 664 | |
| 665 | bg_ptr->conf->sensors[id].data = data; |
| 666 | |
| 667 | return 0; |
| 668 | } |
| 669 | |
| 670 | /** |
| 671 | * omap_bandgap_get_sensor_data() - helper function to get thermal |
| 672 | * framework related data. |
| 673 | * @bg_ptr - pointer to bandgap instance |
| 674 | * @id - sensor id |
| 675 | * |
| 676 | * returns data stored by set function with sensor id on success or NULL |
| 677 | */ |
| 678 | void *omap_bandgap_get_sensor_data(struct omap_bandgap *bg_ptr, int id) |
| 679 | { |
| 680 | int ret = omap_bandgap_validate(bg_ptr, id); |
| 681 | if (ret) |
| 682 | return ERR_PTR(ret); |
| 683 | |
| 684 | return bg_ptr->conf->sensors[id].data; |
| 685 | } |
| 686 | |
| 687 | static int |
| 688 | omap_bandgap_force_single_read(struct omap_bandgap *bg_ptr, int id) |
| 689 | { |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 690 | u32 temp = 0, counter = 1000; |
| 691 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 692 | /* Select single conversion mode */ |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 693 | if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG)) |
| 694 | RMW_BITS(bg_ptr, id, bgap_mode_ctrl, mode_ctrl_mask, 0); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 695 | |
| 696 | /* Start of Conversion = 1 */ |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 697 | RMW_BITS(bg_ptr, id, temp_sensor_ctrl, bgap_soc_mask, 1); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 698 | /* Wait until DTEMP is updated */ |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 699 | temp = omap_bandgap_read_temp(bg_ptr, id); |
| 700 | |
| 701 | while ((temp == 0) && --counter) |
| 702 | temp = omap_bandgap_read_temp(bg_ptr, id); |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 703 | /* REVISIT: Check correct condition for end of conversion */ |
Eduardo Valentin | 194a54f | 2013-02-26 18:53:33 -0400 | [diff] [blame] | 704 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 705 | /* Start of Conversion = 0 */ |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 706 | RMW_BITS(bg_ptr, id, temp_sensor_ctrl, bgap_soc_mask, 0); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 707 | |
| 708 | return 0; |
| 709 | } |
| 710 | |
| 711 | /** |
| 712 | * enable_continuous_mode() - One time enabling of continuous conversion mode |
| 713 | * @bg_ptr - pointer to scm instance |
| 714 | * |
| 715 | * Call this function only if HAS(MODE_CONFIG) is set |
| 716 | */ |
| 717 | static int enable_continuous_mode(struct omap_bandgap *bg_ptr) |
| 718 | { |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 719 | int i; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 720 | |
| 721 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 722 | /* Perform a single read just before enabling continuous */ |
| 723 | omap_bandgap_force_single_read(bg_ptr, i); |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 724 | RMW_BITS(bg_ptr, i, bgap_mode_ctrl, mode_ctrl_mask, 1); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 725 | } |
| 726 | |
| 727 | return 0; |
| 728 | } |
| 729 | |
| 730 | static int omap_bandgap_tshut_init(struct omap_bandgap *bg_ptr, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 731 | struct platform_device *pdev) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 732 | { |
| 733 | int gpio_nr = bg_ptr->tshut_gpio; |
| 734 | int status; |
| 735 | |
| 736 | /* Request for gpio_86 line */ |
| 737 | status = gpio_request(gpio_nr, "tshut"); |
| 738 | if (status < 0) { |
| 739 | dev_err(bg_ptr->dev, |
| 740 | "Could not request for TSHUT GPIO:%i\n", 86); |
| 741 | return status; |
| 742 | } |
| 743 | status = gpio_direction_input(gpio_nr); |
| 744 | if (status) { |
| 745 | dev_err(bg_ptr->dev, |
| 746 | "Cannot set input TSHUT GPIO %d\n", gpio_nr); |
| 747 | return status; |
| 748 | } |
| 749 | |
| 750 | status = request_irq(gpio_to_irq(gpio_nr), |
| 751 | omap_bandgap_tshut_irq_handler, |
| 752 | IRQF_TRIGGER_RISING, "tshut", |
| 753 | NULL); |
| 754 | if (status) { |
| 755 | gpio_free(gpio_nr); |
| 756 | dev_err(bg_ptr->dev, "request irq failed for TSHUT"); |
| 757 | } |
| 758 | |
| 759 | return 0; |
| 760 | } |
| 761 | |
| 762 | /* Initialization of Talert. Call it only if HAS(TALERT) is set */ |
| 763 | static int omap_bandgap_talert_init(struct omap_bandgap *bg_ptr, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 764 | struct platform_device *pdev) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 765 | { |
| 766 | int ret; |
| 767 | |
| 768 | bg_ptr->irq = platform_get_irq(pdev, 0); |
| 769 | if (bg_ptr->irq < 0) { |
| 770 | dev_err(&pdev->dev, "get_irq failed\n"); |
| 771 | return bg_ptr->irq; |
| 772 | } |
| 773 | ret = request_threaded_irq(bg_ptr->irq, NULL, |
Eduardo Valentin | f230427 | 2013-03-15 09:00:00 -0400 | [diff] [blame] | 774 | omap_bandgap_talert_irq_handler, |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 775 | IRQF_TRIGGER_HIGH | IRQF_ONESHOT, |
| 776 | "talert", bg_ptr); |
| 777 | if (ret) { |
| 778 | dev_err(&pdev->dev, "Request threaded irq failed.\n"); |
| 779 | return ret; |
| 780 | } |
| 781 | |
| 782 | return 0; |
| 783 | } |
| 784 | |
| 785 | static const struct of_device_id of_omap_bandgap_match[]; |
| 786 | static struct omap_bandgap *omap_bandgap_build(struct platform_device *pdev) |
| 787 | { |
| 788 | struct device_node *node = pdev->dev.of_node; |
| 789 | const struct of_device_id *of_id; |
| 790 | struct omap_bandgap *bg_ptr; |
| 791 | struct resource *res; |
| 792 | u32 prop; |
| 793 | int i; |
| 794 | |
| 795 | /* just for the sake */ |
| 796 | if (!node) { |
| 797 | dev_err(&pdev->dev, "no platform information available\n"); |
| 798 | return ERR_PTR(-EINVAL); |
| 799 | } |
| 800 | |
| 801 | bg_ptr = devm_kzalloc(&pdev->dev, sizeof(struct omap_bandgap), |
| 802 | GFP_KERNEL); |
| 803 | if (!bg_ptr) { |
| 804 | dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n"); |
| 805 | return ERR_PTR(-ENOMEM); |
| 806 | } |
| 807 | |
| 808 | of_id = of_match_device(of_omap_bandgap_match, &pdev->dev); |
| 809 | if (of_id) |
| 810 | bg_ptr->conf = of_id->data; |
| 811 | |
| 812 | i = 0; |
| 813 | do { |
| 814 | void __iomem *chunk; |
| 815 | |
| 816 | res = platform_get_resource(pdev, IORESOURCE_MEM, i); |
| 817 | if (!res) |
| 818 | break; |
Thierry Reding | 97f4be60 | 2013-01-21 11:09:19 +0100 | [diff] [blame] | 819 | chunk = devm_ioremap_resource(&pdev->dev, res); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 820 | if (i == 0) |
| 821 | bg_ptr->base = chunk; |
Thierry Reding | 97f4be60 | 2013-01-21 11:09:19 +0100 | [diff] [blame] | 822 | if (IS_ERR(chunk)) |
| 823 | return ERR_CAST(chunk); |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 824 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 825 | i++; |
| 826 | } while (res); |
| 827 | |
| 828 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) { |
| 829 | if (of_property_read_u32(node, "ti,tshut-gpio", &prop) < 0) { |
| 830 | dev_err(&pdev->dev, "missing tshut gpio in device tree\n"); |
| 831 | return ERR_PTR(-EINVAL); |
| 832 | } |
| 833 | bg_ptr->tshut_gpio = prop; |
| 834 | if (!gpio_is_valid(bg_ptr->tshut_gpio)) { |
| 835 | dev_err(&pdev->dev, "invalid gpio for tshut (%d)\n", |
| 836 | bg_ptr->tshut_gpio); |
| 837 | return ERR_PTR(-EINVAL); |
| 838 | } |
| 839 | } |
| 840 | |
| 841 | return bg_ptr; |
| 842 | } |
| 843 | |
| 844 | static |
Bill Pemberton | db53ac71 | 2012-11-19 13:22:13 -0500 | [diff] [blame] | 845 | int omap_bandgap_probe(struct platform_device *pdev) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 846 | { |
| 847 | struct omap_bandgap *bg_ptr; |
| 848 | int clk_rate, ret = 0, i; |
| 849 | |
| 850 | bg_ptr = omap_bandgap_build(pdev); |
| 851 | if (IS_ERR_OR_NULL(bg_ptr)) { |
| 852 | dev_err(&pdev->dev, "failed to fetch platform data\n"); |
| 853 | return PTR_ERR(bg_ptr); |
| 854 | } |
| 855 | bg_ptr->dev = &pdev->dev; |
| 856 | |
| 857 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) { |
| 858 | ret = omap_bandgap_tshut_init(bg_ptr, pdev); |
| 859 | if (ret) { |
| 860 | dev_err(&pdev->dev, |
| 861 | "failed to initialize system tshut IRQ\n"); |
| 862 | return ret; |
| 863 | } |
| 864 | } |
| 865 | |
| 866 | bg_ptr->fclock = clk_get(NULL, bg_ptr->conf->fclock_name); |
| 867 | ret = IS_ERR_OR_NULL(bg_ptr->fclock); |
| 868 | if (ret) { |
| 869 | dev_err(&pdev->dev, "failed to request fclock reference\n"); |
| 870 | goto free_irqs; |
| 871 | } |
| 872 | |
| 873 | bg_ptr->div_clk = clk_get(NULL, bg_ptr->conf->div_ck_name); |
| 874 | ret = IS_ERR_OR_NULL(bg_ptr->div_clk); |
| 875 | if (ret) { |
| 876 | dev_err(&pdev->dev, |
| 877 | "failed to request div_ts_ck clock ref\n"); |
| 878 | goto free_irqs; |
| 879 | } |
| 880 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 881 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 882 | struct temp_sensor_registers *tsr; |
| 883 | u32 val; |
| 884 | |
| 885 | tsr = bg_ptr->conf->sensors[i].registers; |
| 886 | /* |
| 887 | * check if the efuse has a non-zero value if not |
| 888 | * it is an untrimmed sample and the temperatures |
| 889 | * may not be accurate |
| 890 | */ |
| 891 | val = omap_bandgap_readl(bg_ptr, tsr->bgap_efuse); |
| 892 | if (ret || !val) |
| 893 | dev_info(&pdev->dev, |
| 894 | "Non-trimmed BGAP, Temp not accurate\n"); |
| 895 | } |
| 896 | |
| 897 | clk_rate = clk_round_rate(bg_ptr->div_clk, |
| 898 | bg_ptr->conf->sensors[0].ts_data->max_freq); |
| 899 | if (clk_rate < bg_ptr->conf->sensors[0].ts_data->min_freq || |
| 900 | clk_rate == 0xffffffff) { |
| 901 | ret = -ENODEV; |
| 902 | dev_err(&pdev->dev, "wrong clock rate (%d)\n", clk_rate); |
| 903 | goto put_clks; |
| 904 | } |
| 905 | |
| 906 | ret = clk_set_rate(bg_ptr->div_clk, clk_rate); |
| 907 | if (ret) |
| 908 | dev_err(&pdev->dev, "Cannot re-set clock rate. Continuing\n"); |
| 909 | |
| 910 | bg_ptr->clk_rate = clk_rate; |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 911 | if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL)) |
Eduardo Valentin | f1d07f3 | 2013-02-26 18:53:38 -0400 | [diff] [blame] | 912 | clk_prepare_enable(bg_ptr->fclock); |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 913 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 914 | |
| 915 | mutex_init(&bg_ptr->bg_mutex); |
| 916 | bg_ptr->dev = &pdev->dev; |
| 917 | platform_set_drvdata(pdev, bg_ptr); |
| 918 | |
| 919 | omap_bandgap_power(bg_ptr, true); |
| 920 | |
| 921 | /* Set default counter to 1 for now */ |
| 922 | if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 923 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 924 | RMW_BITS(bg_ptr, i, bgap_counter, counter_mask, 1); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 925 | |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 926 | /* Set default thresholds for alert and shutdown */ |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 927 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 928 | struct temp_sensor_data *ts_data; |
| 929 | |
| 930 | ts_data = bg_ptr->conf->sensors[i].ts_data; |
| 931 | |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 932 | if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) { |
| 933 | /* Set initial Talert thresholds */ |
| 934 | RMW_BITS(bg_ptr, i, bgap_threshold, |
| 935 | threshold_tcold_mask, ts_data->t_cold); |
| 936 | RMW_BITS(bg_ptr, i, bgap_threshold, |
| 937 | threshold_thot_mask, ts_data->t_hot); |
| 938 | /* Enable the alert events */ |
| 939 | RMW_BITS(bg_ptr, i, bgap_mask_ctrl, mask_hot_mask, 1); |
| 940 | RMW_BITS(bg_ptr, i, bgap_mask_ctrl, mask_cold_mask, 1); |
| 941 | } |
| 942 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 943 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG)) { |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 944 | /* Set initial Tshut thresholds */ |
| 945 | RMW_BITS(bg_ptr, i, tshut_threshold, |
| 946 | tshut_hot_mask, ts_data->tshut_hot); |
| 947 | RMW_BITS(bg_ptr, i, tshut_threshold, |
| 948 | tshut_cold_mask, ts_data->tshut_cold); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 949 | } |
| 950 | } |
| 951 | |
| 952 | if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG)) |
| 953 | enable_continuous_mode(bg_ptr); |
| 954 | |
| 955 | /* Set .250 seconds time as default counter */ |
| 956 | if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 957 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) |
Eduardo Valentin | d3c291a | 2013-03-15 08:59:55 -0400 | [diff] [blame] | 958 | RMW_BITS(bg_ptr, i, bgap_counter, counter_mask, |
| 959 | bg_ptr->clk_rate / 4); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 960 | |
| 961 | /* Every thing is good? Then expose the sensors */ |
| 962 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 963 | char *domain; |
| 964 | |
Eduardo Valentin | 04a4d10 | 2012-09-11 19:06:55 +0300 | [diff] [blame] | 965 | if (bg_ptr->conf->sensors[i].register_cooling) |
| 966 | bg_ptr->conf->sensors[i].register_cooling(bg_ptr, i); |
| 967 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 968 | domain = bg_ptr->conf->sensors[i].domain; |
| 969 | if (bg_ptr->conf->expose_sensor) |
| 970 | bg_ptr->conf->expose_sensor(bg_ptr, i, domain); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 971 | } |
| 972 | |
| 973 | /* |
| 974 | * Enable the Interrupts once everything is set. Otherwise irq handler |
| 975 | * might be called as soon as it is enabled where as rest of framework |
| 976 | * is still getting initialised. |
| 977 | */ |
| 978 | if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) { |
| 979 | ret = omap_bandgap_talert_init(bg_ptr, pdev); |
| 980 | if (ret) { |
| 981 | dev_err(&pdev->dev, "failed to initialize Talert IRQ\n"); |
| 982 | i = bg_ptr->conf->sensor_count; |
| 983 | goto disable_clk; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | return 0; |
| 988 | |
| 989 | disable_clk: |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 990 | if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL)) |
Eduardo Valentin | f1d07f3 | 2013-02-26 18:53:38 -0400 | [diff] [blame] | 991 | clk_disable_unprepare(bg_ptr->fclock); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 992 | put_clks: |
| 993 | clk_put(bg_ptr->fclock); |
| 994 | clk_put(bg_ptr->div_clk); |
| 995 | free_irqs: |
| 996 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) { |
| 997 | free_irq(gpio_to_irq(bg_ptr->tshut_gpio), NULL); |
| 998 | gpio_free(bg_ptr->tshut_gpio); |
| 999 | } |
| 1000 | |
| 1001 | return ret; |
| 1002 | } |
| 1003 | |
| 1004 | static |
Bill Pemberton | 434bd03 | 2012-11-19 13:26:43 -0500 | [diff] [blame] | 1005 | int omap_bandgap_remove(struct platform_device *pdev) |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1006 | { |
| 1007 | struct omap_bandgap *bg_ptr = platform_get_drvdata(pdev); |
| 1008 | int i; |
| 1009 | |
| 1010 | /* First thing is to remove sensor interfaces */ |
| 1011 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 1012 | if (bg_ptr->conf->sensors[i].register_cooling) |
| 1013 | bg_ptr->conf->sensors[i].unregister_cooling(bg_ptr, i); |
| 1014 | |
| 1015 | if (bg_ptr->conf->remove_sensor) |
| 1016 | bg_ptr->conf->remove_sensor(bg_ptr, i); |
| 1017 | } |
| 1018 | |
| 1019 | omap_bandgap_power(bg_ptr, false); |
| 1020 | |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 1021 | if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL)) |
Eduardo Valentin | f1d07f3 | 2013-02-26 18:53:38 -0400 | [diff] [blame] | 1022 | clk_disable_unprepare(bg_ptr->fclock); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1023 | clk_put(bg_ptr->fclock); |
| 1024 | clk_put(bg_ptr->div_clk); |
| 1025 | |
| 1026 | if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) |
| 1027 | free_irq(bg_ptr->irq, bg_ptr); |
| 1028 | |
| 1029 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT)) { |
| 1030 | free_irq(gpio_to_irq(bg_ptr->tshut_gpio), NULL); |
| 1031 | gpio_free(bg_ptr->tshut_gpio); |
| 1032 | } |
| 1033 | |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | #ifdef CONFIG_PM |
| 1038 | static int omap_bandgap_save_ctxt(struct omap_bandgap *bg_ptr) |
| 1039 | { |
| 1040 | int i; |
| 1041 | |
| 1042 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 1043 | struct temp_sensor_registers *tsr; |
| 1044 | struct temp_sensor_regval *rval; |
| 1045 | |
| 1046 | rval = &bg_ptr->conf->sensors[i].regval; |
| 1047 | tsr = bg_ptr->conf->sensors[i].registers; |
| 1048 | |
| 1049 | if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG)) |
| 1050 | rval->bg_mode_ctrl = omap_bandgap_readl(bg_ptr, |
J Keerthy | 76d2cd3 | 2012-09-11 19:06:52 +0300 | [diff] [blame] | 1051 | tsr->bgap_mode_ctrl); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1052 | if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 1053 | rval->bg_counter = omap_bandgap_readl(bg_ptr, |
J Keerthy | 76d2cd3 | 2012-09-11 19:06:52 +0300 | [diff] [blame] | 1054 | tsr->bgap_counter); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1055 | if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) { |
| 1056 | rval->bg_threshold = omap_bandgap_readl(bg_ptr, |
J Keerthy | 76d2cd3 | 2012-09-11 19:06:52 +0300 | [diff] [blame] | 1057 | tsr->bgap_threshold); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1058 | rval->bg_ctrl = omap_bandgap_readl(bg_ptr, |
J Keerthy | 76d2cd3 | 2012-09-11 19:06:52 +0300 | [diff] [blame] | 1059 | tsr->bgap_mask_ctrl); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1060 | } |
| 1061 | |
| 1062 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG)) |
| 1063 | rval->tshut_threshold = omap_bandgap_readl(bg_ptr, |
J Keerthy | 76d2cd3 | 2012-09-11 19:06:52 +0300 | [diff] [blame] | 1064 | tsr->tshut_threshold); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1065 | } |
| 1066 | |
| 1067 | return 0; |
| 1068 | } |
| 1069 | |
| 1070 | static int omap_bandgap_restore_ctxt(struct omap_bandgap *bg_ptr) |
| 1071 | { |
| 1072 | int i; |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1073 | |
| 1074 | for (i = 0; i < bg_ptr->conf->sensor_count; i++) { |
| 1075 | struct temp_sensor_registers *tsr; |
| 1076 | struct temp_sensor_regval *rval; |
| 1077 | u32 val = 0; |
| 1078 | |
| 1079 | rval = &bg_ptr->conf->sensors[i].regval; |
| 1080 | tsr = bg_ptr->conf->sensors[i].registers; |
| 1081 | |
| 1082 | if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 1083 | val = omap_bandgap_readl(bg_ptr, tsr->bgap_counter); |
| 1084 | |
Radhesh Fadnis | b87ea75 | 2012-11-13 14:10:04 -0400 | [diff] [blame] | 1085 | if (OMAP_BANDGAP_HAS(bg_ptr, TSHUT_CONFIG)) |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 1086 | omap_bandgap_writel(bg_ptr, rval->tshut_threshold, |
| 1087 | tsr->tshut_threshold); |
Radhesh Fadnis | b87ea75 | 2012-11-13 14:10:04 -0400 | [diff] [blame] | 1088 | /* Force immediate temperature measurement and update |
| 1089 | * of the DTEMP field |
| 1090 | */ |
| 1091 | omap_bandgap_force_single_read(bg_ptr, i); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1092 | |
Radhesh Fadnis | b87ea75 | 2012-11-13 14:10:04 -0400 | [diff] [blame] | 1093 | if (OMAP_BANDGAP_HAS(bg_ptr, COUNTER)) |
| 1094 | omap_bandgap_writel(bg_ptr, rval->bg_counter, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 1095 | tsr->bgap_counter); |
Radhesh Fadnis | b87ea75 | 2012-11-13 14:10:04 -0400 | [diff] [blame] | 1096 | if (OMAP_BANDGAP_HAS(bg_ptr, MODE_CONFIG)) |
| 1097 | omap_bandgap_writel(bg_ptr, rval->bg_mode_ctrl, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 1098 | tsr->bgap_mode_ctrl); |
Radhesh Fadnis | b87ea75 | 2012-11-13 14:10:04 -0400 | [diff] [blame] | 1099 | if (OMAP_BANDGAP_HAS(bg_ptr, TALERT)) { |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 1100 | omap_bandgap_writel(bg_ptr, rval->bg_threshold, |
| 1101 | tsr->bgap_threshold); |
Radhesh Fadnis | b87ea75 | 2012-11-13 14:10:04 -0400 | [diff] [blame] | 1102 | omap_bandgap_writel(bg_ptr, rval->bg_ctrl, |
Eduardo Valentin | 24796e1 | 2013-03-15 08:59:53 -0400 | [diff] [blame] | 1103 | tsr->bgap_mask_ctrl); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | return 0; |
| 1108 | } |
| 1109 | |
| 1110 | static int omap_bandgap_suspend(struct device *dev) |
| 1111 | { |
| 1112 | struct omap_bandgap *bg_ptr = dev_get_drvdata(dev); |
| 1113 | int err; |
| 1114 | |
| 1115 | err = omap_bandgap_save_ctxt(bg_ptr); |
| 1116 | omap_bandgap_power(bg_ptr, false); |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 1117 | |
| 1118 | if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL)) |
Eduardo Valentin | f1d07f3 | 2013-02-26 18:53:38 -0400 | [diff] [blame] | 1119 | clk_disable_unprepare(bg_ptr->fclock); |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1120 | |
| 1121 | return err; |
| 1122 | } |
| 1123 | |
| 1124 | static int omap_bandgap_resume(struct device *dev) |
| 1125 | { |
| 1126 | struct omap_bandgap *bg_ptr = dev_get_drvdata(dev); |
| 1127 | |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 1128 | if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL)) |
Eduardo Valentin | f1d07f3 | 2013-02-26 18:53:38 -0400 | [diff] [blame] | 1129 | clk_prepare_enable(bg_ptr->fclock); |
Radhesh Fadnis | 6c9c1d6 | 2013-02-26 18:53:25 -0400 | [diff] [blame] | 1130 | |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1131 | omap_bandgap_power(bg_ptr, true); |
| 1132 | |
| 1133 | return omap_bandgap_restore_ctxt(bg_ptr); |
| 1134 | } |
| 1135 | static const struct dev_pm_ops omap_bandgap_dev_pm_ops = { |
| 1136 | SET_SYSTEM_SLEEP_PM_OPS(omap_bandgap_suspend, |
| 1137 | omap_bandgap_resume) |
| 1138 | }; |
| 1139 | |
| 1140 | #define DEV_PM_OPS (&omap_bandgap_dev_pm_ops) |
| 1141 | #else |
| 1142 | #define DEV_PM_OPS NULL |
| 1143 | #endif |
| 1144 | |
| 1145 | static const struct of_device_id of_omap_bandgap_match[] = { |
Eduardo Valentin | 1a31270 | 2012-07-12 19:02:31 +0300 | [diff] [blame] | 1146 | #ifdef CONFIG_OMAP4_THERMAL |
| 1147 | { |
| 1148 | .compatible = "ti,omap4430-bandgap", |
| 1149 | .data = (void *)&omap4430_data, |
| 1150 | }, |
| 1151 | { |
| 1152 | .compatible = "ti,omap4460-bandgap", |
| 1153 | .data = (void *)&omap4460_data, |
| 1154 | }, |
| 1155 | { |
| 1156 | .compatible = "ti,omap4470-bandgap", |
| 1157 | .data = (void *)&omap4470_data, |
| 1158 | }, |
| 1159 | #endif |
Eduardo Valentin | 949f5a5 | 2012-07-12 19:02:32 +0300 | [diff] [blame] | 1160 | #ifdef CONFIG_OMAP5_THERMAL |
| 1161 | { |
| 1162 | .compatible = "ti,omap5430-bandgap", |
| 1163 | .data = (void *)&omap5430_data, |
| 1164 | }, |
| 1165 | #endif |
Eduardo Valentin | 8feaf0ce | 2012-07-12 19:02:29 +0300 | [diff] [blame] | 1166 | /* Sentinel */ |
| 1167 | { }, |
| 1168 | }; |
| 1169 | MODULE_DEVICE_TABLE(of, of_omap_bandgap_match); |
| 1170 | |
| 1171 | static struct platform_driver omap_bandgap_sensor_driver = { |
| 1172 | .probe = omap_bandgap_probe, |
| 1173 | .remove = omap_bandgap_remove, |
| 1174 | .driver = { |
| 1175 | .name = "omap-bandgap", |
| 1176 | .pm = DEV_PM_OPS, |
| 1177 | .of_match_table = of_omap_bandgap_match, |
| 1178 | }, |
| 1179 | }; |
| 1180 | |
| 1181 | module_platform_driver(omap_bandgap_sensor_driver); |
| 1182 | |
| 1183 | MODULE_DESCRIPTION("OMAP4+ bandgap temperature sensor driver"); |
| 1184 | MODULE_LICENSE("GPL v2"); |
| 1185 | MODULE_ALIAS("platform:omap-bandgap"); |
| 1186 | MODULE_AUTHOR("Texas Instrument Inc."); |