mcp251x_write_reg
mcp251x_write_reg(spi, TXBCTRL(0), 0);
mcp251x_write_reg(spi, BFPCTRL, priv->reg_bfpctrl);
mcp251x_write_reg(spi, TXBCTRL(tx_buf_idx) + i,
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_SLEEP);
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_CONF);
mcp251x_write_reg(spi, CANINTE,
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LOOPBACK);
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_LISTEN_ONLY);
mcp251x_write_reg(spi, CANCTRL, CANCTRL_REQOP_NORMAL);
mcp251x_write_reg(spi, CNF1, ((bt->sjw - 1) << CNF1_SJW_SHIFT) |
mcp251x_write_reg(spi, CNF2, CNF2_BTLMODE |
mcp251x_write_reg(spi, RXBCTRL(0),
mcp251x_write_reg(spi, RXBCTRL(1),
mcp251x_write_reg(spi, TXBCTRL(0), 0);