diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-12-06 19:55:40 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2021-12-08 12:19:48 +0300 |
| commit | 3a1ae63a4d218d0d51646380fe406405660b9a5c (patch) | |
| tree | 396c9213e6ef3d61a23f28049fd33710c744c085 /drivers | |
| parent | 369cf4e6ac53f1595ef8602a8a984bce9b895ddb (diff) | |
| download | linux-3a1ae63a4d218d0d51646380fe406405660b9a5c.tar.xz | |
can: hi311x: hi3110_can_probe(): try to get crystal clock rate from property
In some configurations, mainly ACPI-based, the clock frequency of the
device is supplied by very well established 'clock-frequency'
property. Hence, try to get it from the property at last if no other
providers are available.
Link: https://lore.kernel.org/all/20211206165542.69887-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/can/spi/hi311x.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/net/can/spi/hi311x.c b/drivers/net/can/spi/hi311x.c index 13fb979645cf..c9efdd10d0f8 100644 --- a/drivers/net/can/spi/hi311x.c +++ b/drivers/net/can/spi/hi311x.c @@ -830,17 +830,26 @@ static int hi3110_can_probe(struct spi_device *spi) { const struct of_device_id *of_id = of_match_device(hi3110_of_match, &spi->dev); + struct device *dev = &spi->dev; struct net_device *net; struct hi3110_priv *priv; struct clk *clk; - int freq, ret; + u32 freq; + int ret; clk = devm_clk_get_optional(&spi->dev, NULL); if (IS_ERR(clk)) { dev_err(&spi->dev, "no CAN clock source defined\n"); return PTR_ERR(clk); } - freq = clk_get_rate(clk); + + if (clk) { + freq = clk_get_rate(clk); + } else { + ret = device_property_read_u32(dev, "clock-frequency", &freq); + if (ret) + return dev_err_probe(dev, ret, "Failed to get clock-frequency!\n"); + } /* Sanity check */ if (freq > 40000000) |