Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

NFC: Fix device node probing issue

Browse source 
Probing fails after retrying maximum times to
receive response for NCI core reset command.

Changed method of receiving response from poll
mode to interrupt mode to receive response of
the NCI commands sent.

Change-Id: I41b0fc8e99fc31fd8b573549a21087737f540ed8
Signed-off-by: Bhuvan Varshney <bvarshne@codeaurora.org>
This commit is contained in:
Bhuvan Varshney 2019-06-17 18:41:54 +05:30
parent 2f79d07f10
commit 0421fe1127
1 changed files with 15 additions and 5 deletions

20
drivers/nfc/nq-nci.c
View file

@ -827,6 +827,9 @@ static int nfcc_hw_check(struct i2c_client *client, struct nqx_dev *nqx_dev)
reset_enable_gpio:
/* making sure that the NFCC starts in a clean state. */
gpio_set_value(enable_gpio, 1);/* HPD : Enable*/
/* hardware dependent delay */
usleep_range(10000, 10100);
gpio_set_value(enable_gpio, 0);/* ULPM: Disable */
/* hardware dependent delay */
usleep_range(10000, 10100);
@ -892,8 +895,12 @@ static int nfcc_hw_check(struct i2c_client *client, struct nqx_dev *nqx_dev)
}
goto err_nfcc_reset_failed;
}
/* hardware dependent delay */
msleep(30);
nqx_enable_irq(nqx_dev);
ret = wait_event_interruptible(nqx_dev->read_wq, !nqx_dev->irq_enabled);
if (ret < 0) {
nqx_disable_irq(nqx_dev);
goto err_nfcc_hw_check;
}
/* Read Response of RESET command */
ret = i2c_master_recv(client, nci_reset_rsp, NCI_RESET_RSP_LEN);
@ -905,9 +912,12 @@ static int nfcc_hw_check(struct i2c_client *client, struct nqx_dev *nqx_dev)
goto reset_enable_gpio;
goto err_nfcc_hw_check;
}
/* hardware dependent delay */
msleep(30);
nqx_enable_irq(nqx_dev);
ret = wait_event_interruptible(nqx_dev->read_wq, !nqx_dev->irq_enabled);
if (ret < 0) {
nqx_disable_irq(nqx_dev);
goto err_nfcc_hw_check;
}
/* Read Notification of RESET command */
ret = i2c_master_recv(client, nci_reset_ntf, NCI_RESET_NTF_LEN);