mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-20 03:04:01 +08:00
Input: elants_i2c - use DMA safe i2c when possible
To avoid bounce buffer when an i2c controller decides to use DMA for a transaction, let's make out buffer that we use for reads DMA-safe and let the master know that DMAing into it is safe. Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
parent
dde2744321
commit
00f73f9752
@ -147,10 +147,11 @@ struct elants_data {
|
||||
u8 cmd_resp[HEADER_SIZE];
|
||||
struct completion cmd_done;
|
||||
|
||||
u8 buf[MAX_PACKET_SIZE];
|
||||
|
||||
bool wake_irq_enabled;
|
||||
bool keep_power_in_suspend;
|
||||
|
||||
/* Must be last to be used for DMA operations */
|
||||
u8 buf[MAX_PACKET_SIZE] ____cacheline_aligned;
|
||||
};
|
||||
|
||||
static int elants_i2c_send(struct i2c_client *client,
|
||||
@ -863,7 +864,7 @@ static irqreturn_t elants_i2c_irq(int irq, void *_dev)
|
||||
int i;
|
||||
int len;
|
||||
|
||||
len = i2c_master_recv(client, ts->buf, sizeof(ts->buf));
|
||||
len = i2c_master_recv_dmasafe(client, ts->buf, sizeof(ts->buf));
|
||||
if (len < 0) {
|
||||
dev_err(&client->dev, "%s: failed to read data: %d\n",
|
||||
__func__, len);
|
||||
|
Loading…
Reference in New Issue
Block a user