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dlkm: aw8695: fix enter standby mode failture

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Sometimes we find that the IC can't enter standby mode.
The root casue is that the period between go bit operation
and standby mode operation was less than 2ms.
Add wakelock to avoid this concurrent issue.

Change-Id: I318741acd2e60a019a32da3e91a6b373fe2d3020
Signed-off-by: Weilong Wu <wuwl10@motorola.com>
Reviewed-on: https://gerrit.mot.com/1508966
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Jianqi Yang <yangj@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Weilong Wu 2020-03-09 11:22:31 +08:00
commit 8a49c2bd4f
1 changed files with 17 additions and 4 deletions
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21
drivers/misc/awinic/aw8695/aw8695.c
View file

@ -1,7 +1,7 @@
/*
* aw8695.c aw8695 haptic module
*
* Version: v1.3.4
* Version: v1.3.6
*
* Copyright (c) 2018 AWINIC Technology CO., LTD
*
@ -41,7 +41,7 @@
#define AW8695_I2C_NAME "aw8695_haptic"
#define AW8695_HAPTIC_NAME "aw8695_haptic"
#define AW8695_VERSION "v1.3.5"
#define AW8695_VERSION "v1.3.6"
#define AWINIC_RAM_UPDATE_DELAY
@ -1138,6 +1138,7 @@ static unsigned char aw8695_haptic_rtp_get_fifo_afi(struct aw8695 *aw8695)
static int aw8695_haptic_rtp_init(struct aw8695 *aw8695)
{
unsigned int buf_len = 0;
unsigned char reg_val = 0;
pr_info("%s enter\n", __func__);
@ -1146,6 +1147,10 @@ static int aw8695_haptic_rtp_init(struct aw8695 *aw8695)
while ((!aw8695_haptic_rtp_get_fifo_afi(aw8695)) &&
(aw8695->play_mode == AW8695_HAPTIC_RTP_MODE)) {
pr_info("%s rtp cnt = %d\n", __func__, aw8695->rtp_cnt);
if (!aw8695_rtp) {
pr_info("%s:aw8695_rtp is null break\n", __func__);
break;
}
if ((aw8695_rtp->len - aw8695->rtp_cnt) < (aw8695->ram.base_addr >> 2)) {
buf_len = aw8695_rtp->len - aw8695->rtp_cnt;
} else {
@ -1154,7 +1159,9 @@ static int aw8695_haptic_rtp_init(struct aw8695 *aw8695)
aw8695_i2c_writes(aw8695, AW8695_REG_RTP_DATA,
&aw8695_rtp->data[aw8695->rtp_cnt], buf_len);
aw8695->rtp_cnt += buf_len;
if (aw8695->rtp_cnt == aw8695_rtp->len) {
aw8695_i2c_read(aw8695, AW8695_REG_GLB_STATE, &reg_val);
if ((aw8695->rtp_cnt == aw8695_rtp->len) || ((reg_val & 0x0f) == 0x00)) {
pr_info("%s: rtp update complete\n", __func__);
aw8695->rtp_cnt = 0;
return 0;
@ -1201,6 +1208,8 @@ static void aw8695_rtp_work_routine(struct work_struct *work)
memcpy(aw8695_rtp->data, rtp_file->data, rtp_file->size);
release_firmware(rtp_file);
mutex_lock(&aw8695->lock);
aw8695->rtp_init = 1;
/* gain */
@ -1212,6 +1221,8 @@ static void aw8695_rtp_work_routine(struct work_struct *work)
/* haptic start */
aw8695_haptic_start(aw8695);
mutex_unlock(&aw8695->lock);
aw8695_haptic_rtp_init(aw8695);
}
@ -3290,6 +3301,7 @@ static irqreturn_t aw8695_irq(int irq, void *data)
unsigned char reg_val = 0;
unsigned char dbg_val = 0;
unsigned int buf_len = 0;
unsigned char glb_state = 0;
pr_debug("%s enter\n", __func__);
@ -3329,7 +3341,8 @@ static irqreturn_t aw8695_irq(int irq, void *data)
aw8695_i2c_writes(aw8695, AW8695_REG_RTP_DATA,
&aw8695_rtp->data[aw8695->rtp_cnt], buf_len);
aw8695->rtp_cnt += buf_len;
if (aw8695->rtp_cnt == aw8695_rtp->len) {
aw8695_i2c_read(aw8695, AW8695_REG_GLB_STATE, &glb_state);
if ((aw8695->rtp_cnt == aw8695_rtp->len) || ((glb_state & 0x0f) == 0x00)) {
pr_info("%s: rtp update complete\n", __func__);
aw8695_haptic_set_rtp_aei(aw8695, false);
aw8695->rtp_cnt = 0;