diff options
| author | Alexander Shiyan <shc_work@mail.ru> | 2014-03-28 14:14:44 +0400 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2014-04-24 22:54:15 +0200 |
| commit | 31473c286cc09720c0238d085c9de2b890ddb965 (patch) | |
| tree | fab5406e6b9ae709ec2ade1cc70e91613421e63b /drivers/net/can | |
| parent | 6afc0d7a85770abd282ebed41f0f35cde390d861 (diff) | |
can: mcp251x: Check return value of spi_setup()
This patch moves setup of SPI bus a bit earlier and adds check for spi_setup()
result to be sure SPI bus is communicating with the device properly.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Tested-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/mcp251x.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c index 28c11f815245..356d3da0c5e2 100644 --- a/drivers/net/can/mcp251x.c +++ b/drivers/net/can/mcp251x.c @@ -1032,8 +1032,8 @@ static int mcp251x_can_probe(struct spi_device *spi) struct mcp251x_platform_data *pdata = dev_get_platdata(&spi->dev); struct net_device *net; struct mcp251x_priv *priv; - int freq, ret = -ENODEV; struct clk *clk; + int freq, ret; clk = devm_clk_get(&spi->dev, NULL); if (IS_ERR(clk)) { @@ -1076,6 +1076,18 @@ static int mcp251x_can_probe(struct spi_device *spi) priv->net = net; priv->clk = clk; + spi_set_drvdata(spi, priv); + + /* Configure the SPI bus */ + spi->bits_per_word = 8; + if (mcp251x_is_2510(spi)) + spi->max_speed_hz = spi->max_speed_hz ? : 5 * 1000 * 1000; + else + spi->max_speed_hz = spi->max_speed_hz ? : 10 * 1000 * 1000; + ret = spi_setup(spi); + if (ret) + goto out_clk; + priv->power = devm_regulator_get(&spi->dev, "vdd"); priv->transceiver = devm_regulator_get(&spi->dev, "xceiver"); if ((PTR_ERR(priv->power) == -EPROBE_DEFER) || @@ -1088,8 +1100,6 @@ static int mcp251x_can_probe(struct spi_device *spi) if (ret) goto out_clk; - spi_set_drvdata(spi, priv); - priv->spi = spi; mutex_init(&priv->mcp_lock); @@ -1134,15 +1144,6 @@ static int mcp251x_can_probe(struct spi_device *spi) SET_NETDEV_DEV(net, &spi->dev); - /* Configure the SPI bus */ - spi->mode = spi->mode ? : SPI_MODE_0; - if (mcp251x_is_2510(spi)) - spi->max_speed_hz = spi->max_speed_hz ? : 5 * 1000 * 1000; - else - spi->max_speed_hz = spi->max_speed_hz ? : 10 * 1000 * 1000; - spi->bits_per_word = 8; - spi_setup(spi); - /* Here is OK to not lock the MCP, no one knows about it yet */ if (!mcp251x_hw_probe(spi)) { ret = -ENODEV; |