Hi,
I'm stuck with dts problem. Whenever I try to find a clock for my
device, the of_get_clk returns an error "Kernel panic - not syncing:
Can't get timer clock"
My DTS looks like this (reduced to relevant parts for easier reading):
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include "skeleton.dtsi"
/ {
[...]
soc {
#address-cells = <1>;
#size-cells = <1>;
compatible = "simple-bus";
ranges;
gic: interrupt-controller@10212000 {
compatible = "arm,cortex-a9-gic";
interrupt-controller;
#interrupt-cells = <3>;
reg = <0x10211000 0x1000>,
<0x10212000 0x1000>;
};
osc: oscillator {
compatible = "fixed-clock";
#clock-cells = <1>;
clock-frequency = <15000000>;
clock-output-names = "osc";
};
timer: timer-mysoc {
compatible = "mysoc,mysoc-timer";
reg = <0x10008000 0x30>;
interrupts = <GIC_SPI 113 IRQ_TYPE_EDGE_RISING>;
clocks = <&osc 0>;
clock-names = "system15m";
};
};
};
my /drivers/clocksource/mysoc-timer.c looks like this (reduced to
relevant parts for easier reading):
[...]
static void __init mysoc_timer_init(struct device_node *node)
{
unsigned long rate = 0;
struct clk *clk;
int ret, irq;
u32 val;
gpt_base = of_iomap(node, 0);
if (!gpt_base)
panic("Can't map registers");
irq = irq_of_parse_and_map(node, 0);
if (irq <= 0)
panic("Can't parse IRQ");
clk = of_clk_get(node, 0);
if (IS_ERR(clk))
panic("Can't get timer clock");
clk_prepare_enable(clk);
rate = clk_get_rate(clk);
}
CLOCKSOURCE_OF_DECLARE(mtk_mt6589, "mysoc,mysoc-timer",
mysoc_timer_init);
What I'm missing? I seems as if the clock "osc" is not found in the
device tree. Any idea why. Building the DTB works without errors, but
I suppose that doesn't mean too much anyway.
Cheers,
Matthias
--
motzblog.wordpress.com
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