#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/serial_core.h>
#include <linux/serial.h>
struct regmap *regmap, int irq, unsigned long flags)
{
struct sched_param sched_param = { .sched_priority = MAX_RT_PRIO / 2 };
- unsigned long freq, *pfreq = dev_get_platdata(dev);
+ unsigned long freq = 0, *pfreq = dev_get_platdata(dev);
+ u32 uartclk = 0;
int i, ret;
struct sc16is7xx_port *s;
return -ENOMEM;
}
+ /* Always ask for fixed clock rate from a property. */
+ device_property_read_u32(dev, "clock-frequency", &uartclk);
+
s->clk = devm_clk_get(dev, NULL);
if (IS_ERR(s->clk)) {
+ if (uartclk)
+ freq = uartclk;
if (pfreq)
freq = *pfreq;
+ if (freq)
+ dev_dbg(dev, "Clock frequency: %luHz\n", freq);
else
return PTR_ERR(s->clk);
} else {