diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-08-26 20:26:21 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2019-09-03 11:23:57 +0300 |
| commit | b4cb76961c953cde1c60f52d2b6d434672da82f8 (patch) | |
| tree | 3e331713110dec05b3676d667cd52490620fd84d /drivers/net/can/spi/mcp251x.c | |
| parent | f6cae800bfdb6711f0d45af98643a944998be6f2 (diff) | |
| download | linux-b4cb76961c953cde1c60f52d2b6d434672da82f8.tar.xz | |
can: mcp251x: Use devm_clk_get_optional() to get the input clock
Simplify the code which fetches the input clock by using
devm_clk_get_optional(). This comes with a small functional change: previously
all errors were ignored when platform data is present. Now all errors are
treated as errors. If no input clock is present devm_clk_get_optional() will
return NULL instead of an error which matches the behavior of the old code.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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 | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c index 6e5831308c70..b5d70826a186 100644 --- a/drivers/net/can/spi/mcp251x.c +++ b/drivers/net/can/spi/mcp251x.c @@ -994,15 +994,13 @@ static int mcp251x_can_probe(struct spi_device *spi) struct clk *clk; int freq, ret; - clk = devm_clk_get(&spi->dev, NULL); - if (IS_ERR(clk)) { - if (pdata) - freq = pdata->oscillator_frequency; - else - return PTR_ERR(clk); - } else { - freq = clk_get_rate(clk); - } + clk = devm_clk_get_optional(&spi->dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + + freq = clk_get_rate(clk); + if (freq == 0 && pdata) + freq = pdata->oscillator_frequency; /* Sanity check */ if (freq < 1000000 || freq > 25000000) @@ -1013,11 +1011,9 @@ static int mcp251x_can_probe(struct spi_device *spi) if (!net) return -ENOMEM; - if (!IS_ERR(clk)) { - ret = clk_prepare_enable(clk); - if (ret) - goto out_free; - } + ret = clk_prepare_enable(clk); + if (ret) + goto out_free; net->netdev_ops = &mcp251x_netdev_ops; net->flags |= IFF_ECHO; @@ -1102,8 +1098,7 @@ error_probe: mcp251x_power_enable(priv->power, 0); out_clk: - if (!IS_ERR(clk)) - clk_disable_unprepare(clk); + clk_disable_unprepare(clk); out_free: free_candev(net); @@ -1121,8 +1116,7 @@ static int mcp251x_can_remove(struct spi_device *spi) mcp251x_power_enable(priv->power, 0); - if (!IS_ERR(priv->clk)) - clk_disable_unprepare(priv->clk); + clk_disable_unprepare(priv->clk); free_candev(net); |