2 * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24
3 * Copyright (C) 2009, 2010 STMicroelectronics
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 * STMicroelectronics version 1.2.0, Copyright (C) 2010
20 * STMicroelectronics comes with ABSOLUTELY NO WARRANTY.
21 * This is free software, and you are welcome to redistribute it
22 * under certain conditions.
24 * @Author: Christophe RICARD tpmsupport@st.com
26 * @File: tpm_stm_st33_i2c.c
29 * 09/15/2010: First shot driver tpm_tis driver for
33 #include <linux/pci.h>
34 #include <linux/module.h>
35 #include <linux/platform_device.h>
36 #include <linux/i2c.h>
38 #include <linux/miscdevice.h>
39 #include <linux/kernel.h>
40 #include <linux/delay.h>
41 #include <linux/init.h>
42 #include <linux/wait.h>
43 #include <linux/string.h>
44 #include <linux/interrupt.h>
45 #include <linux/spinlock.h>
46 #include <linux/sysfs.h>
47 #include <linux/gpio.h>
48 #include <linux/sched.h>
49 #include <linux/uaccess.h>
51 #include <linux/slab.h>
54 #include "tpm_i2c_stm_st33.h"
56 enum stm33zp24_access {
57 TPM_ACCESS_VALID = 0x80,
58 TPM_ACCESS_ACTIVE_LOCALITY = 0x20,
59 TPM_ACCESS_REQUEST_PENDING = 0x04,
60 TPM_ACCESS_REQUEST_USE = 0x02,
63 enum stm33zp24_status {
65 TPM_STS_COMMAND_READY = 0x40,
67 TPM_STS_DATA_AVAIL = 0x10,
68 TPM_STS_DATA_EXPECT = 0x08,
71 enum stm33zp24_int_flags {
72 TPM_GLOBAL_INT_ENABLE = 0x80,
73 TPM_INTF_CMD_READY_INT = 0x080,
74 TPM_INTF_FIFO_AVALAIBLE_INT = 0x040,
75 TPM_INTF_WAKE_UP_READY_INT = 0x020,
76 TPM_INTF_LOCALITY_CHANGE_INT = 0x004,
77 TPM_INTF_STS_VALID_INT = 0x002,
78 TPM_INTF_DATA_AVAIL_INT = 0x001,
82 TIS_SHORT_TIMEOUT = 750,
83 TIS_LONG_TIMEOUT = 2000,
88 * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
89 * @param: tpm_register, the tpm tis register where the data should be written
90 * @param: tpm_data, the tpm_data to write inside the tpm_register
91 * @param: tpm_size, The length of the data
92 * @return: Returns negative errno, or else the number of bytes written.
94 static int write8_reg(struct i2c_client *client, u8 tpm_register,
95 u8 *tpm_data, u16 tpm_size)
97 struct st33zp24_platform_data *pin_infos;
99 pin_infos = client->dev.platform_data;
101 pin_infos->tpm_i2c_buffer[0][0] = tpm_register;
102 memcpy(&pin_infos->tpm_i2c_buffer[0][1], tpm_data, tpm_size);
103 return i2c_master_send(client, pin_infos->tpm_i2c_buffer[0],
109 * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
110 * @param: tpm_register, the tpm tis register where the data should be read
111 * @param: tpm_data, the TPM response
112 * @param: tpm_size, tpm TPM response size to read.
113 * @return: number of byte read successfully: should be one if success.
115 static int read8_reg(struct i2c_client *client, u8 tpm_register,
116 u8 *tpm_data, int tpm_size)
121 data = TPM_DUMMY_BYTE;
122 status = write8_reg(client, tpm_register, &data, 1);
124 status = i2c_master_recv(client, tpm_data, tpm_size);
130 * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
131 * @param: client, the chip description
132 * @param: tpm_register, the tpm tis register where the data should be written
133 * @param: tpm_data, the tpm_data to write inside the tpm_register
134 * @param: tpm_size, The length of the data
135 * @return: number of byte written successfully: should be one if success.
137 #define I2C_WRITE_DATA(client, tpm_register, tpm_data, tpm_size) \
138 (write8_reg(client, tpm_register | \
139 TPM_WRITE_DIRECTION, tpm_data, tpm_size))
143 * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
144 * @param: tpm, the chip description
145 * @param: tpm_register, the tpm tis register where the data should be read
146 * @param: tpm_data, the TPM response
147 * @param: tpm_size, tpm TPM response size to read.
148 * @return: number of byte read successfully: should be one if success.
150 #define I2C_READ_DATA(client, tpm_register, tpm_data, tpm_size) \
151 (read8_reg(client, tpm_register, tpm_data, tpm_size))
155 * clear the TPM interrupt register.
156 * @param: tpm, the chip description
158 static void clear_interruption(struct i2c_client *client)
161 I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1);
162 I2C_WRITE_DATA(client, TPM_INT_STATUS, &interrupt, 1);
163 I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1);
164 } /* clear_interruption() */
167 * _wait_for_interrupt_serirq_timeout
168 * @param: tpm, the chip description
169 * @param: timeout, the timeout of the interrupt
170 * @return: the status of the interruption.
172 static long _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip,
173 unsigned long timeout)
176 struct i2c_client *client;
177 struct st33zp24_platform_data *pin_infos;
179 client = (struct i2c_client *)TPM_VPRIV(chip);
180 pin_infos = client->dev.platform_data;
182 status = wait_for_completion_interruptible_timeout(
183 &pin_infos->irq_detection,
186 enable_irq(gpio_to_irq(pin_infos->io_serirq));
187 gpio_direction_input(pin_infos->io_serirq);
190 } /* wait_for_interrupt_serirq_timeout() */
192 static int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition,
193 unsigned long timeout)
196 struct i2c_client *client;
198 client = (struct i2c_client *)TPM_VPRIV(chip);
200 status = _wait_for_interrupt_serirq_timeout(chip, timeout);
204 clear_interruption(client);
212 * tpm_stm_i2c_cancel, cancel is not implemented.
213 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
215 static void tpm_stm_i2c_cancel(struct tpm_chip *chip)
217 struct i2c_client *client;
220 client = (struct i2c_client *)TPM_VPRIV(chip);
222 data = TPM_STS_COMMAND_READY;
223 I2C_WRITE_DATA(client, TPM_STS, &data, 1);
224 if (chip->vendor.irq)
225 wait_for_serirq_timeout(chip, 1, chip->vendor.timeout_a);
226 } /* tpm_stm_i2c_cancel() */
229 * tpm_stm_spi_status return the TPM_STS register
230 * @param: chip, the tpm chip description
231 * @return: the TPM_STS register value.
233 static u8 tpm_stm_i2c_status(struct tpm_chip *chip)
235 struct i2c_client *client;
237 client = (struct i2c_client *)TPM_VPRIV(chip);
239 I2C_READ_DATA(client, TPM_STS, &data, 1);
241 } /* tpm_stm_i2c_status() */
245 * check_locality if the locality is active
246 * @param: chip, the tpm chip description
247 * @return: the active locality or -EACCESS.
249 static int check_locality(struct tpm_chip *chip)
251 struct i2c_client *client;
255 client = (struct i2c_client *)TPM_VPRIV(chip);
257 status = I2C_READ_DATA(client, TPM_ACCESS, &data, 1);
258 if (status && (data &
259 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) ==
260 (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID))
261 return chip->vendor.locality;
265 } /* check_locality() */
268 * request_locality request the TPM locality
269 * @param: chip, the chip description
270 * @return: the active locality or EACCESS.
272 static int request_locality(struct tpm_chip *chip)
276 struct i2c_client *client;
279 client = (struct i2c_client *)TPM_VPRIV(chip);
281 if (check_locality(chip) == chip->vendor.locality)
282 return chip->vendor.locality;
284 data = TPM_ACCESS_REQUEST_USE;
285 rc = I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1);
289 if (chip->vendor.irq) {
290 rc = wait_for_serirq_timeout(chip, (check_locality
292 chip->vendor.timeout_a);
294 return chip->vendor.locality;
296 stop = jiffies + chip->vendor.timeout_a;
298 if (check_locality(chip) >= 0)
299 return chip->vendor.locality;
301 } while (time_before(jiffies, stop));
306 } /* request_locality() */
309 * release_locality release the active locality
310 * @param: chip, the tpm chip description.
312 static void release_locality(struct tpm_chip *chip)
314 struct i2c_client *client;
317 client = (struct i2c_client *)TPM_VPRIV(chip);
318 data = TPM_ACCESS_ACTIVE_LOCALITY;
320 I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1);
324 * get_burstcount return the burstcount address 0x19 0x1A
325 * @param: chip, the chip description
326 * return: the burstcount.
328 static int get_burstcount(struct tpm_chip *chip)
331 int burstcnt, status;
334 struct i2c_client *client = (struct i2c_client *)TPM_VPRIV(chip);
336 stop = jiffies + chip->vendor.timeout_d;
338 tpm_reg = TPM_STS + 1;
339 status = I2C_READ_DATA(client, tpm_reg, &temp, 1);
343 tpm_reg = tpm_reg + 1;
345 status = I2C_READ_DATA(client, tpm_reg, &temp, 1);
349 burstcnt |= temp << 8;
353 } while (time_before(jiffies, stop));
357 } /* get_burstcount() */
360 * wait_for_stat wait for a TPM_STS value
361 * @param: chip, the tpm chip description
362 * @param: mask, the value mask to wait
363 * @param: timeout, the timeout
364 * @param: queue, the wait queue.
365 * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
367 static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
368 wait_queue_head_t *queue)
374 if (chip->vendor.irq) {
375 rc = wait_for_serirq_timeout(chip, ((tpm_stm_i2c_status
381 stop = jiffies + timeout;
384 status = tpm_stm_i2c_status(chip);
385 if ((status & mask) == mask)
387 } while (time_before(jiffies, stop));
390 } /* wait_for_stat() */
393 * recv_data receive data
394 * @param: chip, the tpm chip description
395 * @param: buf, the buffer where the data are received
396 * @param: count, the number of data to receive
397 * @return: the number of bytes read from TPM FIFO.
399 static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count)
401 int size = 0, burstcnt, len;
402 struct i2c_client *client;
404 client = (struct i2c_client *)TPM_VPRIV(chip);
406 while (size < count &&
408 TPM_STS_DATA_AVAIL | TPM_STS_VALID,
409 chip->vendor.timeout_c,
410 &chip->vendor.read_queue)
412 burstcnt = get_burstcount(chip);
415 len = min_t(int, burstcnt, count - size);
416 I2C_READ_DATA(client, TPM_DATA_FIFO, buf + size, len);
423 * tpm_ioserirq_handler the serirq irq handler
424 * @param: irq, the tpm chip description
425 * @param: dev_id, the description of the chip
426 * @return: the status of the handler.
428 static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id)
430 struct tpm_chip *chip = dev_id;
431 struct i2c_client *client;
432 struct st33zp24_platform_data *pin_infos;
434 disable_irq_nosync(irq);
436 client = (struct i2c_client *)TPM_VPRIV(chip);
437 pin_infos = client->dev.platform_data;
439 complete(&pin_infos->irq_detection);
441 } /* tpm_ioserirq_handler() */
445 * tpm_stm_i2c_send send TPM commands through the I2C bus.
447 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
448 * @param: buf, the buffer to send.
449 * @param: count, the number of bytes to send.
450 * @return: In case of success the number of bytes sent.
451 * In other case, a < 0 value describing the issue.
453 static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf,
460 struct i2c_client *client;
464 if (len < TPM_HEADER_SIZE)
467 client = (struct i2c_client *)TPM_VPRIV(chip);
471 ret = request_locality(chip);
475 status = tpm_stm_i2c_status(chip);
476 if ((status & TPM_STS_COMMAND_READY) == 0) {
477 tpm_stm_i2c_cancel(chip);
479 (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b,
480 &chip->vendor.int_queue) < 0) {
486 for (i = 0; i < len - 1;) {
487 burstcnt = get_burstcount(chip);
490 size = min_t(int, len - i - 1, burstcnt);
491 ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf, size);
498 status = tpm_stm_i2c_status(chip);
499 if ((status & TPM_STS_DATA_EXPECT) == 0) {
504 ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf + len - 1, 1);
508 status = tpm_stm_i2c_status(chip);
509 if ((status & TPM_STS_DATA_EXPECT) != 0) {
515 I2C_WRITE_DATA(client, TPM_STS, &data, 1);
519 tpm_stm_i2c_cancel(chip);
520 release_locality(chip);
525 * tpm_stm_i2c_recv received TPM response through the I2C bus.
526 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
527 * @param: buf, the buffer to store datas.
528 * @param: count, the number of bytes to send.
529 * @return: In case of success the number of bytes received.
530 * In other case, a < 0 value describing the issue.
532 static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
541 if (count < TPM_HEADER_SIZE) {
546 size = recv_data(chip, buf, TPM_HEADER_SIZE);
547 if (size < TPM_HEADER_SIZE) {
548 dev_err(chip->dev, "Unable to read header\n");
552 expected = be32_to_cpu(*(__be32 *)(buf + 2));
553 if (expected > count) {
558 size += recv_data(chip, &buf[TPM_HEADER_SIZE],
559 expected - TPM_HEADER_SIZE);
560 if (size < expected) {
561 dev_err(chip->dev, "Unable to read remainder of result\n");
567 chip->vendor.cancel(chip);
568 release_locality(chip);
572 static bool tpm_st33_i2c_req_canceled(struct tpm_chip *chip, u8 status)
574 return (status == TPM_STS_COMMAND_READY);
577 static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
578 static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
579 static DEVICE_ATTR(enabled, S_IRUGO, tpm_show_enabled, NULL);
580 static DEVICE_ATTR(active, S_IRUGO, tpm_show_active, NULL);
581 static DEVICE_ATTR(owned, S_IRUGO, tpm_show_owned, NULL);
582 static DEVICE_ATTR(temp_deactivated, S_IRUGO, tpm_show_temp_deactivated, NULL);
583 static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
584 static DEVICE_ATTR(cancel, S_IWUSR | S_IWGRP, NULL, tpm_store_cancel);
586 static struct attribute *stm_tpm_attrs[] = {
587 &dev_attr_pubek.attr,
589 &dev_attr_enabled.attr,
590 &dev_attr_active.attr,
591 &dev_attr_owned.attr,
592 &dev_attr_temp_deactivated.attr,
594 &dev_attr_cancel.attr, NULL,
597 static struct attribute_group stm_tpm_attr_grp = {
598 .attrs = stm_tpm_attrs
601 static struct tpm_vendor_specific st_i2c_tpm = {
602 .send = tpm_stm_i2c_send,
603 .recv = tpm_stm_i2c_recv,
604 .cancel = tpm_stm_i2c_cancel,
605 .status = tpm_stm_i2c_status,
606 .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
607 .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID,
608 .req_canceled = tpm_st33_i2c_req_canceled,
609 .attr_group = &stm_tpm_attr_grp,
612 static int interrupts;
613 module_param(interrupts, int, 0444);
614 MODULE_PARM_DESC(interrupts, "Enable interrupts");
616 static int power_mgt = 1;
617 module_param(power_mgt, int, 0444);
618 MODULE_PARM_DESC(power_mgt, "Power Management");
621 * tpm_st33_i2c_probe initialize the TPM device
622 * @param: client, the i2c_client drescription (TPM I2C description).
623 * @param: id, the i2c_device_id struct.
624 * @return: 0 in case of success.
628 tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
632 struct tpm_chip *chip;
633 struct st33zp24_platform_data *platform_data;
635 if (client == NULL) {
636 pr_info("%s: i2c client is NULL. Device not accessible.\n",
642 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
643 dev_info(&client->dev, "client not i2c capable\n");
648 chip = tpm_register_hardware(&client->dev, &st_i2c_tpm);
650 dev_info(&client->dev, "fail chip\n");
655 platform_data = client->dev.platform_data;
657 if (!platform_data) {
658 dev_info(&client->dev, "chip not available\n");
660 goto _tpm_clean_answer;
663 platform_data->tpm_i2c_buffer[0] =
664 kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
665 if (platform_data->tpm_i2c_buffer[0] == NULL) {
667 goto _tpm_clean_answer;
669 platform_data->tpm_i2c_buffer[1] =
670 kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL);
671 if (platform_data->tpm_i2c_buffer[1] == NULL) {
673 goto _tpm_clean_response1;
676 TPM_VPRIV(chip) = client;
678 chip->vendor.timeout_a = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
679 chip->vendor.timeout_b = msecs_to_jiffies(TIS_LONG_TIMEOUT);
680 chip->vendor.timeout_c = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
681 chip->vendor.timeout_d = msecs_to_jiffies(TIS_SHORT_TIMEOUT);
683 chip->vendor.locality = LOCALITY0;
686 err = gpio_request(platform_data->io_lpcpd, "TPM IO_LPCPD");
689 gpio_set_value(platform_data->io_lpcpd, 1);
693 init_completion(&platform_data->irq_detection);
694 if (request_locality(chip) != LOCALITY0) {
696 goto _tpm_clean_response2;
698 err = gpio_request(platform_data->io_serirq, "TPM IO_SERIRQ");
702 clear_interruption(client);
703 err = request_irq(gpio_to_irq(platform_data->io_serirq),
704 &tpm_ioserirq_handler,
706 "TPM SERIRQ management", chip);
708 dev_err(chip->dev , "TPM SERIRQ signals %d not available\n",
709 gpio_to_irq(platform_data->io_serirq));
713 err = I2C_READ_DATA(client, TPM_INT_ENABLE, &intmask, 1);
717 intmask |= TPM_INTF_CMD_READY_INT
718 | TPM_INTF_FIFO_AVALAIBLE_INT
719 | TPM_INTF_WAKE_UP_READY_INT
720 | TPM_INTF_LOCALITY_CHANGE_INT
721 | TPM_INTF_STS_VALID_INT
722 | TPM_INTF_DATA_AVAIL_INT;
724 err = I2C_WRITE_DATA(client, TPM_INT_ENABLE, &intmask, 1);
728 intmask = TPM_GLOBAL_INT_ENABLE;
729 err = I2C_WRITE_DATA(client, (TPM_INT_ENABLE + 3), &intmask, 1);
733 err = I2C_READ_DATA(client, TPM_INT_STATUS, &intmask, 1);
737 chip->vendor.irq = interrupts;
739 tpm_gen_interrupt(chip);
742 tpm_get_timeouts(chip);
744 dev_info(chip->dev, "TPM I2C Initialized\n");
747 free_irq(gpio_to_irq(platform_data->io_serirq), (void *)chip);
750 gpio_free(platform_data->io_serirq);
753 gpio_free(platform_data->io_lpcpd);
754 _tpm_clean_response2:
755 kzfree(platform_data->tpm_i2c_buffer[1]);
756 platform_data->tpm_i2c_buffer[1] = NULL;
757 _tpm_clean_response1:
758 kzfree(platform_data->tpm_i2c_buffer[0]);
759 platform_data->tpm_i2c_buffer[0] = NULL;
761 tpm_remove_hardware(chip->dev);
763 pr_info("TPM I2C initialisation fail\n");
768 * tpm_st33_i2c_remove remove the TPM device
769 * @param: client, the i2c_client drescription (TPM I2C description).
770 clear_bit(0, &chip->is_open);
771 * @return: 0 in case of success.
773 static int tpm_st33_i2c_remove(struct i2c_client *client)
775 struct tpm_chip *chip = (struct tpm_chip *)i2c_get_clientdata(client);
776 struct st33zp24_platform_data *pin_infos =
777 ((struct i2c_client *)TPM_VPRIV(chip))->dev.platform_data;
779 if (pin_infos != NULL) {
780 free_irq(pin_infos->io_serirq, chip);
782 gpio_free(pin_infos->io_serirq);
783 gpio_free(pin_infos->io_lpcpd);
785 tpm_remove_hardware(chip->dev);
787 if (pin_infos->tpm_i2c_buffer[1] != NULL) {
788 kzfree(pin_infos->tpm_i2c_buffer[1]);
789 pin_infos->tpm_i2c_buffer[1] = NULL;
791 if (pin_infos->tpm_i2c_buffer[0] != NULL) {
792 kzfree(pin_infos->tpm_i2c_buffer[0]);
793 pin_infos->tpm_i2c_buffer[0] = NULL;
800 #ifdef CONFIG_PM_SLEEP
802 * tpm_st33_i2c_pm_suspend suspend the TPM device
803 * @param: client, the i2c_client drescription (TPM I2C description).
804 * @param: mesg, the power management message.
805 * @return: 0 in case of success.
807 static int tpm_st33_i2c_pm_suspend(struct device *dev)
809 struct st33zp24_platform_data *pin_infos = dev->platform_data;
813 gpio_set_value(pin_infos->io_lpcpd, 0);
815 ret = tpm_pm_suspend(dev);
818 } /* tpm_st33_i2c_suspend() */
821 * tpm_st33_i2c_pm_resume resume the TPM device
822 * @param: client, the i2c_client drescription (TPM I2C description).
823 * @return: 0 in case of success.
825 static int tpm_st33_i2c_pm_resume(struct device *dev)
827 struct tpm_chip *chip = dev_get_drvdata(dev);
828 struct st33zp24_platform_data *pin_infos = dev->platform_data;
833 gpio_set_value(pin_infos->io_lpcpd, 1);
834 ret = wait_for_serirq_timeout(chip,
835 (chip->vendor.status(chip) &
836 TPM_STS_VALID) == TPM_STS_VALID,
837 chip->vendor.timeout_b);
839 ret = tpm_pm_resume(dev);
841 tpm_do_selftest(chip);
844 } /* tpm_st33_i2c_pm_resume() */
847 static const struct i2c_device_id tpm_st33_i2c_id[] = {
851 MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id);
852 static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend,
853 tpm_st33_i2c_pm_resume);
854 static struct i2c_driver tpm_st33_i2c_driver = {
856 .owner = THIS_MODULE,
857 .name = TPM_ST33_I2C,
858 .pm = &tpm_st33_i2c_ops,
860 .probe = tpm_st33_i2c_probe,
861 .remove = tpm_st33_i2c_remove,
862 .id_table = tpm_st33_i2c_id
865 module_i2c_driver(tpm_st33_i2c_driver);
867 MODULE_AUTHOR("Christophe Ricard (tpmsupport@st.com)");
868 MODULE_DESCRIPTION("STM TPM I2C ST33 Driver");
869 MODULE_VERSION("1.2.0");
870 MODULE_LICENSE("GPL");