xtensa: xtfpga: use common clock framework

With this change the board needs to set up single clock object, users of
this clock will get correct frequency automatically.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

diff --git a/arch/xtensa/boot/dts/xtfpga.dtsi b/arch/xtensa/boot/dts/xtfpga.dtsi
index 46b4f5e..d5ccbbb 100644 (file)
--- a/arch/xtensa/boot/dts/xtfpga.dtsi
+++ b/arch/xtensa/boot/dts/xtfpga.dtsi
@@ -35,6 +35,13 @@
                interrupt-controller;
        };
 
+       clocks {
+               osc: main-oscillator {
+                       #clock-cells = <0>;
+                       compatible = "fixed-clock";
+               };
+       };
+
        serial0: serial@fd050020 {
                device_type = "serial";
                compatible = "ns16550a";
@@ -42,9 +49,7 @@
                reg = <0xfd050020 0x20>;
                reg-shift = <2>;
                interrupts = <0 1>; /* external irq 0 */
-               /* Filled in by platform_setup from FPGA register
-                * clock-frequency = <100000000>;
-                */
+               clocks = <&osc>;
        };
 
        enet0: ethoc@fd030000 {

diff --git a/arch/xtensa/platforms/xtfpga/setup.c b/arch/xtensa/platforms/xtfpga/setup.c
index 8002278..0372913 100644 (file)
--- a/arch/xtensa/platforms/xtfpga/setup.c
+++ b/arch/xtensa/platforms/xtfpga/setup.c
@@ -135,11 +135,11 @@ static void __init update_local_mac(struct device_node *node)
 
 static int __init machine_setup(void)
 {
-       struct device_node *serial;
+       struct device_node *clock;
        struct device_node *eth = NULL;
 
-       for_each_compatible_node(serial, NULL, "ns16550a")
-               update_clock_frequency(serial);
+       for_each_node_by_name(clock, "main-oscillator")
+               update_clock_frequency(clock);
 
        if ((eth = of_find_compatible_node(eth, NULL, "opencores,ethoc")))
                update_local_mac(eth);