@@ -12,6 +12,7 @@
#define SUPPORT_SYSRQ
#endif
+#include <linux/clk.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
@@ -1203,7 +1204,18 @@ static int omap8250_probe(struct platform_device *pdev)
}
up.port.line = ret;
- of_property_read_u32(np, "clock-frequency", &up.port.uartclk);
+ if (of_property_read_u32(np, "clock-frequency", &up.port.uartclk)) {
+ struct clk *clk;
+
+ clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(clk)) {
+ if (PTR_ERR(clk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ } else {
+ up.port.uartclk = clk_get_rate(clk);
+ }
+ }
+
priv->wakeirq = irq_of_parse_and_map(np, 1);
id = of_match_device(of_match_ptr(omap8250_dt_ids), &pdev->dev);
8250_omap driver uses clock-frequency DT property to obtain functional clk frequency. This is not ideal as users need to calculate functional clk frequency offline and populate it in DT. Therefore add support to obtain functional clock frequency using clk APIs when clock-frequency DT property is not defined. Suggested-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Vignesh R <vigneshr@ti.com> --- drivers/tty/serial/8250/8250_omap.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)