diff options
| author | Timo Schlüßler <schluessler@krause.de> | 2019-10-11 16:38:20 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2019-11-11 23:57:28 +0300 |
| commit | 877a902103fd3ed15872a5d740fca8aa3f5fa33f (patch) | |
| tree | 129c1fd2b1dbd8025df5d9b0e4cc4ab9d3f3dd83 /drivers/net/can/spi/mcp251x.c | |
| parent | 50ec88120ea16cf8b9aabf8422c364166ce3ee17 (diff) | |
| download | linux-877a902103fd3ed15872a5d740fca8aa3f5fa33f.tar.xz | |
can: mcp251x: add mcp251x_write_2regs() and make use of it
This patch introduces the function mcp251x_write_2regs() to write two
registers with one SPI transfer and converts the disabling of pending
interrupts in mcp251x_stop() to it.
Signed-off-by: Timo Schlüßler <schluessler@krause.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/spi/mcp251x.c')
| -rw-r--r-- | drivers/net/can/spi/mcp251x.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c index ee2e97da4e1d..d371d3868a66 100644 --- a/drivers/net/can/spi/mcp251x.c +++ b/drivers/net/can/spi/mcp251x.c @@ -320,6 +320,18 @@ static void mcp251x_write_reg(struct spi_device *spi, u8 reg, u8 val) mcp251x_spi_trans(spi, 3); } +static void mcp251x_write_2regs(struct spi_device *spi, u8 reg, u8 v1, u8 v2) +{ + struct mcp251x_priv *priv = spi_get_drvdata(spi); + + priv->spi_tx_buf[0] = INSTRUCTION_WRITE; + priv->spi_tx_buf[1] = reg; + priv->spi_tx_buf[2] = v1; + priv->spi_tx_buf[3] = v2; + + mcp251x_spi_trans(spi, 4); +} + static void mcp251x_write_bits(struct spi_device *spi, u8 reg, u8 mask, u8 val) { @@ -645,8 +657,7 @@ static int mcp251x_stop(struct net_device *net) mutex_lock(&priv->mcp_lock); /* Disable and clear pending interrupts */ - mcp251x_write_reg(spi, CANINTE, 0x00); - mcp251x_write_reg(spi, CANINTF, 0x00); + mcp251x_write_2regs(spi, CANINTE, 0x00, 0x00); mcp251x_write_reg(spi, TXBCTRL(0), 0); mcp251x_clean(net); |