diff options
| -rw-r--r-- | include/net/nfc/nci_core.h | 6 | ||||
| -rw-r--r-- | net/nfc/nci/spi.c | 7 |
2 files changed, 12 insertions, 1 deletions
diff --git a/include/net/nfc/nci_core.h b/include/net/nfc/nci_core.h index 77880bdf93a8..5a1572a34c49 100644 --- a/include/net/nfc/nci_core.h +++ b/include/net/nfc/nci_core.h @@ -394,6 +394,12 @@ struct nci_spi { unsigned int xfer_udelay; /* microseconds delay between transactions */ + + unsigned int xfer_speed_hz; /* + * SPI clock frequency + * 0 => default clock + */ + u8 acknowledge_mode; struct completion req_completion; diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c index 25153d0e33cf..d904cd2f1442 100644 --- a/net/nfc/nci/spi.c +++ b/net/nfc/nci/spi.c @@ -58,6 +58,7 @@ static int __nci_spi_send(struct nci_spi *nspi, struct sk_buff *skb, } t.cs_change = cs_change; t.delay_usecs = nspi->xfer_udelay; + t.speed_hz = nspi->xfer_speed_hz; spi_message_init(&m); spi_message_add_tail(&t, &m); @@ -144,7 +145,8 @@ struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi, nspi->acknowledge_mode = acknowledge_mode; nspi->xfer_udelay = delay; - + /* Use controller max SPI speed by default */ + nspi->xfer_speed_hz = 0; nspi->spi = spi; nspi->ndev = ndev; init_completion(&nspi->req_completion); @@ -197,12 +199,14 @@ static struct sk_buff *__nci_spi_read(struct nci_spi *nspi) tx.tx_buf = req; tx.len = 2; tx.cs_change = 0; + tx.speed_hz = nspi->xfer_speed_hz; spi_message_add_tail(&tx, &m); memset(&rx, 0, sizeof(struct spi_transfer)); rx.rx_buf = resp_hdr; rx.len = 2; rx.cs_change = 1; + rx.speed_hz = nspi->xfer_speed_hz; spi_message_add_tail(&rx, &m); ret = spi_sync(nspi->spi, &m); @@ -226,6 +230,7 @@ static struct sk_buff *__nci_spi_read(struct nci_spi *nspi) rx.len = rx_len; rx.cs_change = 0; rx.delay_usecs = nspi->xfer_udelay; + rx.speed_hz = nspi->xfer_speed_hz; spi_message_add_tail(&rx, &m); ret = spi_sync(nspi->spi, &m); |