evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

drivers: net: can: Inform power states to CAN controller

Browse source 
CAN controller needs to be aware of host power state to decide
if a timestamp message can be sent to host or not.

Change-Id: I89a570a2fb38336c38d0105bbb3df8b89d7e3035
Signed-off-by: Balachandra C S <balacs@codeaurora.org>
This commit is contained in:
Balachandra C S 2018-07-09 17:24:41 +05:30 • committed by Gerrit - the friendly Code Review server
parent eb119bcb2a
commit fc93ec766e
1 changed files with 32 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

33
drivers/net/can/spi/qti-can.c
View file

@ -121,6 +121,8 @@ struct spi_miso { /* TLV for MISO line */
#define CMD_END_BOOT_ROM_UPGRADE 0x9B
#define CMD_END_FW_UPDATE_FILE 0x9C
#define CMD_UPDATE_TIME_INFO 0x9D
#define CMD_UPDATE_SUSPEND_EVENT 0x9E
#define CMD_UPDATE_RESUME_EVENT 0x9F
#define IOCTL_RELEASE_CAN_BUFFER (SIOCDEVPRIVATE + 0)
#define IOCTL_ENABLE_BUFFERING (SIOCDEVPRIVATE + 1)
@ -580,6 +582,30 @@ static int qti_can_query_firmware_version(struct qti_can *priv_data)
return ret;
}
static int qti_can_notify_power_events(struct qti_can *priv_data, u8 event_type)
{
char *tx_buf, *rx_buf;
int ret;
struct spi_mosi *req;
mutex_lock(&priv_data->spi_lock);
tx_buf = priv_data->tx_buf;
rx_buf = priv_data->rx_buf;
memset(tx_buf, 0, XFER_BUFFER_SIZE);
memset(rx_buf, 0, XFER_BUFFER_SIZE);
priv_data->xfer_length = XFER_BUFFER_SIZE;
req = (struct spi_mosi *)tx_buf;
req->cmd = event_type;
req->len = 0;
req->seq = atomic_inc_return(&priv_data->msg_seq);
ret = qti_can_do_spi_transaction(priv_data);
mutex_unlock(&priv_data->spi_lock);
return ret;
}
static int qti_can_set_bitrate(struct net_device *netdev)
{
char *tx_buf, *rx_buf;
@ -1439,6 +1465,10 @@ static int qti_can_remove(struct spi_device *spi)
static int qti_can_suspend(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct qti_can *priv_data = spi_get_drvdata(spi);
u8 power_event = CMD_UPDATE_SUSPEND_EVENT;
qti_can_notify_power_events(priv_data, power_event);
enable_irq_wake(spi->irq);
return 0;
@ -1448,9 +1478,10 @@ static int qti_can_resume(struct device *dev)
{
struct spi_device *spi = to_spi_device(dev);
struct qti_can *priv_data = spi_get_drvdata(spi);
u8 power_event = CMD_UPDATE_RESUME_EVENT;
disable_irq_wake(spi->irq);
qti_can_rx_message(priv_data);
qti_can_notify_power_events(priv_data, power_event);
return 0;
}