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/wait.h>
42 #include <linux/string.h>
43 #include <linux/interrupt.h>
44 #include <linux/spinlock.h>
45 #include <linux/sysfs.h>
46 #include <linux/gpio.h>
47 #include <linux/sched.h>
48 #include <linux/uaccess.h>
50 #include <linux/slab.h>
53 #include "tpm_i2c_stm_st33.h"
55 enum stm33zp24_access
{
56 TPM_ACCESS_VALID
= 0x80,
57 TPM_ACCESS_ACTIVE_LOCALITY
= 0x20,
58 TPM_ACCESS_REQUEST_PENDING
= 0x04,
59 TPM_ACCESS_REQUEST_USE
= 0x02,
62 enum stm33zp24_status
{
64 TPM_STS_COMMAND_READY
= 0x40,
66 TPM_STS_DATA_AVAIL
= 0x10,
67 TPM_STS_DATA_EXPECT
= 0x08,
70 enum stm33zp24_int_flags
{
71 TPM_GLOBAL_INT_ENABLE
= 0x80,
72 TPM_INTF_CMD_READY_INT
= 0x080,
73 TPM_INTF_FIFO_AVALAIBLE_INT
= 0x040,
74 TPM_INTF_WAKE_UP_READY_INT
= 0x020,
75 TPM_INTF_LOCALITY_CHANGE_INT
= 0x004,
76 TPM_INTF_STS_VALID_INT
= 0x002,
77 TPM_INTF_DATA_AVAIL_INT
= 0x001,
81 TIS_SHORT_TIMEOUT
= 750,
82 TIS_LONG_TIMEOUT
= 2000,
87 * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
88 * @param: tpm_register, the tpm tis register where the data should be written
89 * @param: tpm_data, the tpm_data to write inside the tpm_register
90 * @param: tpm_size, The length of the data
91 * @return: Returns negative errno, or else the number of bytes written.
93 static int write8_reg(struct i2c_client
*client
, u8 tpm_register
,
94 u8
*tpm_data
, u16 tpm_size
)
96 struct st33zp24_platform_data
*pin_infos
;
98 pin_infos
= client
->dev
.platform_data
;
100 pin_infos
->tpm_i2c_buffer
[0][0] = tpm_register
;
101 memcpy(&pin_infos
->tpm_i2c_buffer
[0][1], tpm_data
, tpm_size
);
102 return i2c_master_send(client
, pin_infos
->tpm_i2c_buffer
[0],
108 * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
109 * @param: tpm_register, the tpm tis register where the data should be read
110 * @param: tpm_data, the TPM response
111 * @param: tpm_size, tpm TPM response size to read.
112 * @return: number of byte read successfully: should be one if success.
114 static int read8_reg(struct i2c_client
*client
, u8 tpm_register
,
115 u8
*tpm_data
, int tpm_size
)
120 data
= TPM_DUMMY_BYTE
;
121 status
= write8_reg(client
, tpm_register
, &data
, 1);
123 status
= i2c_master_recv(client
, tpm_data
, tpm_size
);
129 * Send byte to the TIS register according to the ST33ZP24 I2C protocol.
130 * @param: client, the chip description
131 * @param: tpm_register, the tpm tis register where the data should be written
132 * @param: tpm_data, the tpm_data to write inside the tpm_register
133 * @param: tpm_size, The length of the data
134 * @return: number of byte written successfully: should be one if success.
136 #define I2C_WRITE_DATA(client, tpm_register, tpm_data, tpm_size) \
137 (write8_reg(client, tpm_register | \
138 TPM_WRITE_DIRECTION, tpm_data, tpm_size))
142 * Recv byte from the TIS register according to the ST33ZP24 I2C protocol.
143 * @param: tpm, the chip description
144 * @param: tpm_register, the tpm tis register where the data should be read
145 * @param: tpm_data, the TPM response
146 * @param: tpm_size, tpm TPM response size to read.
147 * @return: number of byte read successfully: should be one if success.
149 #define I2C_READ_DATA(client, tpm_register, tpm_data, tpm_size) \
150 (read8_reg(client, tpm_register, tpm_data, tpm_size))
154 * clear the TPM interrupt register.
155 * @param: tpm, the chip description
157 static void clear_interruption(struct i2c_client
*client
)
160 I2C_READ_DATA(client
, TPM_INT_STATUS
, &interrupt
, 1);
161 I2C_WRITE_DATA(client
, TPM_INT_STATUS
, &interrupt
, 1);
162 I2C_READ_DATA(client
, TPM_INT_STATUS
, &interrupt
, 1);
163 } /* clear_interruption() */
166 * _wait_for_interrupt_serirq_timeout
167 * @param: tpm, the chip description
168 * @param: timeout, the timeout of the interrupt
169 * @return: the status of the interruption.
171 static long _wait_for_interrupt_serirq_timeout(struct tpm_chip
*chip
,
172 unsigned long timeout
)
175 struct i2c_client
*client
;
176 struct st33zp24_platform_data
*pin_infos
;
178 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
179 pin_infos
= client
->dev
.platform_data
;
181 status
= wait_for_completion_interruptible_timeout(
182 &pin_infos
->irq_detection
,
185 enable_irq(gpio_to_irq(pin_infos
->io_serirq
));
186 gpio_direction_input(pin_infos
->io_serirq
);
189 } /* wait_for_interrupt_serirq_timeout() */
191 static int wait_for_serirq_timeout(struct tpm_chip
*chip
, bool condition
,
192 unsigned long timeout
)
195 struct i2c_client
*client
;
197 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
199 status
= _wait_for_interrupt_serirq_timeout(chip
, timeout
);
203 clear_interruption(client
);
211 * tpm_stm_i2c_cancel, cancel is not implemented.
212 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
214 static void tpm_stm_i2c_cancel(struct tpm_chip
*chip
)
216 struct i2c_client
*client
;
219 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
221 data
= TPM_STS_COMMAND_READY
;
222 I2C_WRITE_DATA(client
, TPM_STS
, &data
, 1);
223 if (chip
->vendor
.irq
)
224 wait_for_serirq_timeout(chip
, 1, chip
->vendor
.timeout_a
);
225 } /* tpm_stm_i2c_cancel() */
228 * tpm_stm_spi_status return the TPM_STS register
229 * @param: chip, the tpm chip description
230 * @return: the TPM_STS register value.
232 static u8
tpm_stm_i2c_status(struct tpm_chip
*chip
)
234 struct i2c_client
*client
;
236 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
238 I2C_READ_DATA(client
, TPM_STS
, &data
, 1);
240 } /* tpm_stm_i2c_status() */
244 * check_locality if the locality is active
245 * @param: chip, the tpm chip description
246 * @return: the active locality or -EACCESS.
248 static int check_locality(struct tpm_chip
*chip
)
250 struct i2c_client
*client
;
254 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
256 status
= I2C_READ_DATA(client
, TPM_ACCESS
, &data
, 1);
257 if (status
&& (data
&
258 (TPM_ACCESS_ACTIVE_LOCALITY
| TPM_ACCESS_VALID
)) ==
259 (TPM_ACCESS_ACTIVE_LOCALITY
| TPM_ACCESS_VALID
))
260 return chip
->vendor
.locality
;
264 } /* check_locality() */
267 * request_locality request the TPM locality
268 * @param: chip, the chip description
269 * @return: the active locality or EACCESS.
271 static int request_locality(struct tpm_chip
*chip
)
275 struct i2c_client
*client
;
278 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
280 if (check_locality(chip
) == chip
->vendor
.locality
)
281 return chip
->vendor
.locality
;
283 data
= TPM_ACCESS_REQUEST_USE
;
284 rc
= I2C_WRITE_DATA(client
, TPM_ACCESS
, &data
, 1);
288 if (chip
->vendor
.irq
) {
289 rc
= wait_for_serirq_timeout(chip
, (check_locality
291 chip
->vendor
.timeout_a
);
293 return chip
->vendor
.locality
;
295 stop
= jiffies
+ chip
->vendor
.timeout_a
;
297 if (check_locality(chip
) >= 0)
298 return chip
->vendor
.locality
;
300 } while (time_before(jiffies
, stop
));
305 } /* request_locality() */
308 * release_locality release the active locality
309 * @param: chip, the tpm chip description.
311 static void release_locality(struct tpm_chip
*chip
)
313 struct i2c_client
*client
;
316 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
317 data
= TPM_ACCESS_ACTIVE_LOCALITY
;
319 I2C_WRITE_DATA(client
, TPM_ACCESS
, &data
, 1);
323 * get_burstcount return the burstcount address 0x19 0x1A
324 * @param: chip, the chip description
325 * return: the burstcount.
327 static int get_burstcount(struct tpm_chip
*chip
)
330 int burstcnt
, status
;
333 struct i2c_client
*client
= (struct i2c_client
*)TPM_VPRIV(chip
);
335 stop
= jiffies
+ chip
->vendor
.timeout_d
;
337 tpm_reg
= TPM_STS
+ 1;
338 status
= I2C_READ_DATA(client
, tpm_reg
, &temp
, 1);
342 tpm_reg
= tpm_reg
+ 1;
344 status
= I2C_READ_DATA(client
, tpm_reg
, &temp
, 1);
348 burstcnt
|= temp
<< 8;
352 } while (time_before(jiffies
, stop
));
356 } /* get_burstcount() */
359 * wait_for_stat wait for a TPM_STS value
360 * @param: chip, the tpm chip description
361 * @param: mask, the value mask to wait
362 * @param: timeout, the timeout
363 * @param: queue, the wait queue.
364 * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
366 static int wait_for_stat(struct tpm_chip
*chip
, u8 mask
, unsigned long timeout
,
367 wait_queue_head_t
*queue
)
373 if (chip
->vendor
.irq
) {
374 rc
= wait_for_serirq_timeout(chip
, ((tpm_stm_i2c_status
380 stop
= jiffies
+ timeout
;
383 status
= tpm_stm_i2c_status(chip
);
384 if ((status
& mask
) == mask
)
386 } while (time_before(jiffies
, stop
));
389 } /* wait_for_stat() */
392 * recv_data receive data
393 * @param: chip, the tpm chip description
394 * @param: buf, the buffer where the data are received
395 * @param: count, the number of data to receive
396 * @return: the number of bytes read from TPM FIFO.
398 static int recv_data(struct tpm_chip
*chip
, u8
*buf
, size_t count
)
400 int size
= 0, burstcnt
, len
;
401 struct i2c_client
*client
;
403 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
405 while (size
< count
&&
407 TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
408 chip
->vendor
.timeout_c
,
409 &chip
->vendor
.read_queue
)
411 burstcnt
= get_burstcount(chip
);
414 len
= min_t(int, burstcnt
, count
- size
);
415 I2C_READ_DATA(client
, TPM_DATA_FIFO
, buf
+ size
, len
);
422 * tpm_ioserirq_handler the serirq irq handler
423 * @param: irq, the tpm chip description
424 * @param: dev_id, the description of the chip
425 * @return: the status of the handler.
427 static irqreturn_t
tpm_ioserirq_handler(int irq
, void *dev_id
)
429 struct tpm_chip
*chip
= dev_id
;
430 struct i2c_client
*client
;
431 struct st33zp24_platform_data
*pin_infos
;
433 disable_irq_nosync(irq
);
435 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
436 pin_infos
= client
->dev
.platform_data
;
438 complete(&pin_infos
->irq_detection
);
440 } /* tpm_ioserirq_handler() */
444 * tpm_stm_i2c_send send TPM commands through the I2C bus.
446 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h
447 * @param: buf, the buffer to send.
448 * @param: count, the number of bytes to send.
449 * @return: In case of success the number of bytes sent.
450 * In other case, a < 0 value describing the issue.
452 static int tpm_stm_i2c_send(struct tpm_chip
*chip
, unsigned char *buf
,
459 struct i2c_client
*client
;
463 if (len
< TPM_HEADER_SIZE
)
466 client
= (struct i2c_client
*)TPM_VPRIV(chip
);
470 ret
= request_locality(chip
);
474 status
= tpm_stm_i2c_status(chip
);
475 if ((status
& TPM_STS_COMMAND_READY
) == 0) {
476 tpm_stm_i2c_cancel(chip
);
478 (chip
, TPM_STS_COMMAND_READY
, chip
->vendor
.timeout_b
,
479 &chip
->vendor
.int_queue
) < 0) {
485 for (i
= 0; i
< len
- 1;) {
486 burstcnt
= get_burstcount(chip
);
489 size
= min_t(int, len
- i
- 1, burstcnt
);
490 ret
= I2C_WRITE_DATA(client
, TPM_DATA_FIFO
, buf
, size
);
497 status
= tpm_stm_i2c_status(chip
);
498 if ((status
& TPM_STS_DATA_EXPECT
) == 0) {
503 ret
= I2C_WRITE_DATA(client
, TPM_DATA_FIFO
, buf
+ len
- 1, 1);
507 status
= tpm_stm_i2c_status(chip
);
508 if ((status
& TPM_STS_DATA_EXPECT
) != 0) {
514 I2C_WRITE_DATA(client
, TPM_STS
, &data
, 1);
518 tpm_stm_i2c_cancel(chip
);
519 release_locality(chip
);
524 * tpm_stm_i2c_recv received TPM response through the I2C bus.
525 * @param: chip, the tpm_chip description as specified in driver/char/tpm/tpm.h.
526 * @param: buf, the buffer to store datas.
527 * @param: count, the number of bytes to send.
528 * @return: In case of success the number of bytes received.
529 * In other case, a < 0 value describing the issue.
531 static int tpm_stm_i2c_recv(struct tpm_chip
*chip
, unsigned char *buf
,
540 if (count
< TPM_HEADER_SIZE
) {
545 size
= recv_data(chip
, buf
, TPM_HEADER_SIZE
);
546 if (size
< TPM_HEADER_SIZE
) {
547 dev_err(chip
->dev
, "Unable to read header\n");
551 expected
= be32_to_cpu(*(__be32
*)(buf
+ 2));
552 if (expected
> count
) {
557 size
+= recv_data(chip
, &buf
[TPM_HEADER_SIZE
],
558 expected
- TPM_HEADER_SIZE
);
559 if (size
< expected
) {
560 dev_err(chip
->dev
, "Unable to read remainder of result\n");
566 chip
->ops
->cancel(chip
);
567 release_locality(chip
);
571 static bool tpm_st33_i2c_req_canceled(struct tpm_chip
*chip
, u8 status
)
573 return (status
== TPM_STS_COMMAND_READY
);
576 static const struct tpm_class_ops st_i2c_tpm
= {
577 .send
= tpm_stm_i2c_send
,
578 .recv
= tpm_stm_i2c_recv
,
579 .cancel
= tpm_stm_i2c_cancel
,
580 .status
= tpm_stm_i2c_status
,
581 .req_complete_mask
= TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
582 .req_complete_val
= TPM_STS_DATA_AVAIL
| TPM_STS_VALID
,
583 .req_canceled
= tpm_st33_i2c_req_canceled
,
586 static int interrupts
;
587 module_param(interrupts
, int, 0444);
588 MODULE_PARM_DESC(interrupts
, "Enable interrupts");
590 static int power_mgt
= 1;
591 module_param(power_mgt
, int, 0444);
592 MODULE_PARM_DESC(power_mgt
, "Power Management");
595 * tpm_st33_i2c_probe initialize the TPM device
596 * @param: client, the i2c_client drescription (TPM I2C description).
597 * @param: id, the i2c_device_id struct.
598 * @return: 0 in case of success.
602 tpm_st33_i2c_probe(struct i2c_client
*client
, const struct i2c_device_id
*id
)
606 struct tpm_chip
*chip
;
607 struct st33zp24_platform_data
*platform_data
;
609 if (client
== NULL
) {
610 pr_info("%s: i2c client is NULL. Device not accessible.\n",
616 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_I2C
)) {
617 dev_info(&client
->dev
, "client not i2c capable\n");
622 chip
= tpm_register_hardware(&client
->dev
, &st_i2c_tpm
);
624 dev_info(&client
->dev
, "fail chip\n");
629 platform_data
= client
->dev
.platform_data
;
631 if (!platform_data
) {
632 dev_info(&client
->dev
, "chip not available\n");
634 goto _tpm_clean_answer
;
637 platform_data
->tpm_i2c_buffer
[0] =
638 kmalloc(TPM_BUFSIZE
* sizeof(u8
), GFP_KERNEL
);
639 if (platform_data
->tpm_i2c_buffer
[0] == NULL
) {
641 goto _tpm_clean_answer
;
643 platform_data
->tpm_i2c_buffer
[1] =
644 kmalloc(TPM_BUFSIZE
* sizeof(u8
), GFP_KERNEL
);
645 if (platform_data
->tpm_i2c_buffer
[1] == NULL
) {
647 goto _tpm_clean_response1
;
650 TPM_VPRIV(chip
) = client
;
652 chip
->vendor
.timeout_a
= msecs_to_jiffies(TIS_SHORT_TIMEOUT
);
653 chip
->vendor
.timeout_b
= msecs_to_jiffies(TIS_LONG_TIMEOUT
);
654 chip
->vendor
.timeout_c
= msecs_to_jiffies(TIS_SHORT_TIMEOUT
);
655 chip
->vendor
.timeout_d
= msecs_to_jiffies(TIS_SHORT_TIMEOUT
);
657 chip
->vendor
.locality
= LOCALITY0
;
660 err
= gpio_request(platform_data
->io_lpcpd
, "TPM IO_LPCPD");
663 gpio_set_value(platform_data
->io_lpcpd
, 1);
667 init_completion(&platform_data
->irq_detection
);
668 if (request_locality(chip
) != LOCALITY0
) {
670 goto _tpm_clean_response2
;
672 err
= gpio_request(platform_data
->io_serirq
, "TPM IO_SERIRQ");
676 clear_interruption(client
);
677 err
= request_irq(gpio_to_irq(platform_data
->io_serirq
),
678 &tpm_ioserirq_handler
,
680 "TPM SERIRQ management", chip
);
682 dev_err(chip
->dev
, "TPM SERIRQ signals %d not available\n",
683 gpio_to_irq(platform_data
->io_serirq
));
687 err
= I2C_READ_DATA(client
, TPM_INT_ENABLE
, &intmask
, 1);
691 intmask
|= TPM_INTF_CMD_READY_INT
692 | TPM_INTF_FIFO_AVALAIBLE_INT
693 | TPM_INTF_WAKE_UP_READY_INT
694 | TPM_INTF_LOCALITY_CHANGE_INT
695 | TPM_INTF_STS_VALID_INT
696 | TPM_INTF_DATA_AVAIL_INT
;
698 err
= I2C_WRITE_DATA(client
, TPM_INT_ENABLE
, &intmask
, 1);
702 intmask
= TPM_GLOBAL_INT_ENABLE
;
703 err
= I2C_WRITE_DATA(client
, (TPM_INT_ENABLE
+ 3), &intmask
, 1);
707 err
= I2C_READ_DATA(client
, TPM_INT_STATUS
, &intmask
, 1);
711 chip
->vendor
.irq
= interrupts
;
713 tpm_gen_interrupt(chip
);
716 tpm_get_timeouts(chip
);
717 tpm_do_selftest(chip
);
719 dev_info(chip
->dev
, "TPM I2C Initialized\n");
722 free_irq(gpio_to_irq(platform_data
->io_serirq
), (void *)chip
);
725 gpio_free(platform_data
->io_serirq
);
728 gpio_free(platform_data
->io_lpcpd
);
729 _tpm_clean_response2
:
730 kzfree(platform_data
->tpm_i2c_buffer
[1]);
731 platform_data
->tpm_i2c_buffer
[1] = NULL
;
732 _tpm_clean_response1
:
733 kzfree(platform_data
->tpm_i2c_buffer
[0]);
734 platform_data
->tpm_i2c_buffer
[0] = NULL
;
736 tpm_remove_hardware(chip
->dev
);
738 pr_info("TPM I2C initialisation fail\n");
743 * tpm_st33_i2c_remove remove the TPM device
744 * @param: client, the i2c_client drescription (TPM I2C description).
745 clear_bit(0, &chip->is_open);
746 * @return: 0 in case of success.
748 static int tpm_st33_i2c_remove(struct i2c_client
*client
)
750 struct tpm_chip
*chip
= (struct tpm_chip
*)i2c_get_clientdata(client
);
751 struct st33zp24_platform_data
*pin_infos
=
752 ((struct i2c_client
*)TPM_VPRIV(chip
))->dev
.platform_data
;
754 if (pin_infos
!= NULL
) {
755 free_irq(pin_infos
->io_serirq
, chip
);
757 gpio_free(pin_infos
->io_serirq
);
758 gpio_free(pin_infos
->io_lpcpd
);
760 tpm_remove_hardware(chip
->dev
);
762 if (pin_infos
->tpm_i2c_buffer
[1] != NULL
) {
763 kzfree(pin_infos
->tpm_i2c_buffer
[1]);
764 pin_infos
->tpm_i2c_buffer
[1] = NULL
;
766 if (pin_infos
->tpm_i2c_buffer
[0] != NULL
) {
767 kzfree(pin_infos
->tpm_i2c_buffer
[0]);
768 pin_infos
->tpm_i2c_buffer
[0] = NULL
;
775 #ifdef CONFIG_PM_SLEEP
777 * tpm_st33_i2c_pm_suspend suspend the TPM device
778 * @param: client, the i2c_client drescription (TPM I2C description).
779 * @param: mesg, the power management message.
780 * @return: 0 in case of success.
782 static int tpm_st33_i2c_pm_suspend(struct device
*dev
)
784 struct st33zp24_platform_data
*pin_infos
= dev
->platform_data
;
788 gpio_set_value(pin_infos
->io_lpcpd
, 0);
790 ret
= tpm_pm_suspend(dev
);
793 } /* tpm_st33_i2c_suspend() */
796 * tpm_st33_i2c_pm_resume resume the TPM device
797 * @param: client, the i2c_client drescription (TPM I2C description).
798 * @return: 0 in case of success.
800 static int tpm_st33_i2c_pm_resume(struct device
*dev
)
802 struct tpm_chip
*chip
= dev_get_drvdata(dev
);
803 struct st33zp24_platform_data
*pin_infos
= dev
->platform_data
;
808 gpio_set_value(pin_infos
->io_lpcpd
, 1);
809 ret
= wait_for_serirq_timeout(chip
,
810 (chip
->ops
->status(chip
) &
811 TPM_STS_VALID
) == TPM_STS_VALID
,
812 chip
->vendor
.timeout_b
);
814 ret
= tpm_pm_resume(dev
);
816 tpm_do_selftest(chip
);
819 } /* tpm_st33_i2c_pm_resume() */
822 static const struct i2c_device_id tpm_st33_i2c_id
[] = {
826 MODULE_DEVICE_TABLE(i2c
, tpm_st33_i2c_id
);
827 static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops
, tpm_st33_i2c_pm_suspend
,
828 tpm_st33_i2c_pm_resume
);
829 static struct i2c_driver tpm_st33_i2c_driver
= {
831 .owner
= THIS_MODULE
,
832 .name
= TPM_ST33_I2C
,
833 .pm
= &tpm_st33_i2c_ops
,
835 .probe
= tpm_st33_i2c_probe
,
836 .remove
= tpm_st33_i2c_remove
,
837 .id_table
= tpm_st33_i2c_id
840 module_i2c_driver(tpm_st33_i2c_driver
);
842 MODULE_AUTHOR("Christophe Ricard (tpmsupport@st.com)");
843 MODULE_DESCRIPTION("STM TPM I2C ST33 Driver");
844 MODULE_VERSION("1.2.0");
845 MODULE_LICENSE("GPL");