diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2021-05-26 22:33:26 +0300 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2021-07-25 11:36:26 +0200 |
| commit | 74f89cf17e44211d4bd53c8da593de070bf1fe0f (patch) | |
| tree | 9c9c4de7ceda14441192ddd4228393ed72e0c896 /drivers/net/can/spi | |
| parent | 0ddd83fbebbc5537f9d180d31f659db3564be708 (diff) | |
can: mcp251xfd: mcp251xfd_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/r/20210531084444.1785397-1-mkl@pengutronix.de
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')
| -rw-r--r-- | drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c index 6962ab2749df..1544e19b60b9 100644 --- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c +++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c @@ -2860,7 +2860,7 @@ static int mcp251xfd_probe(struct spi_device *spi) struct gpio_desc *rx_int; struct regulator *reg_vdd, *reg_xceiver; struct clk *clk; - u32 freq; + u32 freq = 0; int err; if (!spi->irq) @@ -2887,11 +2887,19 @@ static int mcp251xfd_probe(struct spi_device *spi) return dev_err_probe(&spi->dev, PTR_ERR(reg_xceiver), "Failed to get Transceiver regulator!\n"); - clk = devm_clk_get(&spi->dev, NULL); + clk = devm_clk_get_optional(&spi->dev, NULL); if (IS_ERR(clk)) return dev_err_probe(&spi->dev, PTR_ERR(clk), "Failed to get Oscillator (clock)!\n"); - freq = clk_get_rate(clk); + if (clk) { + freq = clk_get_rate(clk); + } else { + err = device_property_read_u32(&spi->dev, "clock-frequency", + &freq); + if (err) + return dev_err_probe(&spi->dev, err, + "Failed to get clock-frequency!\n"); + } /* Sanity check */ if (freq < MCP251XFD_SYSCLOCK_HZ_MIN || |