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net: ieee802154: adf7242: Avoid redundant RC_READY polling 

READ/WRITE register and packet buffer can be done anytime as long
as SPI_READY. Only CMD transactions require RC_READY && SPI_READY.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
This commit is contained in:
Michael Hennerich 2017-11-28 13:53:14 +01:00 committed by Stefan Schmidt
parent 78f012bc0e
commit c78c1b0139
1 changed files with 12 additions and 6 deletions
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18
drivers/net/ieee802154/adf7242.c
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@ -344,12 +344,18 @@ static int adf7242_wait_status(struct adf7242_local *lp, unsigned int status,
return ret;
}
static int adf7242_wait_ready(struct adf7242_local *lp, int line)
static int adf7242_wait_rc_ready(struct adf7242_local *lp, int line)
{
return adf7242_wait_status(lp, STAT_RC_READY | STAT_SPI_READY,
STAT_RC_READY | STAT_SPI_READY, line);
}
static int adf7242_wait_spi_ready(struct adf7242_local *lp, int line)
{
return adf7242_wait_status(lp, STAT_SPI_READY,
STAT_SPI_READY, line);
}
static int adf7242_write_fbuf(struct adf7242_local *lp, u8 *data, u8 len)
{
u8 *buf = lp->buf;
@ -369,7 +375,7 @@ static int adf7242_write_fbuf(struct adf7242_local *lp, u8 *data, u8 len)
spi_message_add_tail(&xfer_head, &msg);
spi_message_add_tail(&xfer_buf, &msg);
adf7242_wait_ready(lp, __LINE__);
adf7242_wait_spi_ready(lp, __LINE__);
mutex_lock(&lp->bmux);
buf[0] = CMD_SPI_PKT_WR;
@ -401,7 +407,7 @@ static int adf7242_read_fbuf(struct adf7242_local *lp,
spi_message_add_tail(&xfer_head, &msg);
spi_message_add_tail(&xfer_buf, &msg);
adf7242_wait_ready(lp, __LINE__);
adf7242_wait_spi_ready(lp, __LINE__);
mutex_lock(&lp->bmux);
if (packet_read) {
@ -432,7 +438,7 @@ static int adf7242_read_reg(struct adf7242_local *lp, u16 addr, u8 *data)
.rx_buf = lp->buf_read_rx,
};
adf7242_wait_ready(lp, __LINE__);
adf7242_wait_spi_ready(lp, __LINE__);
mutex_lock(&lp->bmux);
lp->buf_read_tx[0] = CMD_SPI_MEM_RD(addr);
@ -462,7 +468,7 @@ static int adf7242_write_reg(struct adf7242_local *lp, u16 addr, u8 data)
{
int status;
adf7242_wait_ready(lp, __LINE__);
adf7242_wait_spi_ready(lp, __LINE__);
mutex_lock(&lp->bmux);
lp->buf_reg_tx[0] = CMD_SPI_MEM_WR(addr);
@ -484,7 +490,7 @@ static int adf7242_cmd(struct adf7242_local *lp, unsigned int cmd)
dev_vdbg(&lp->spi->dev, "%s : CMD=0x%X\n", __func__, cmd);
if (cmd != CMD_RC_PC_RESET_NO_WAIT)
adf7242_wait_ready(lp, __LINE__);
adf7242_wait_rc_ready(lp, __LINE__);
mutex_lock(&lp->bmux);
lp->buf_cmd = cmd;