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ARM: dts: AM437x: Add the internal and external clock nodes for rtc

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rtc can either be supplied from internal 32k clock or external crystal
generated 32k clock. Internal clock is SOC specific and the external
clock is board dependent. Adding the corresponding nodes.

Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
This commit is contained in:
Keerthy 2015-08-18 15:11:14 +05:30 committed by Alexandre Belloni
parent ff02c0444b
commit fff51e771e
5 changed files with 37 additions and 0 deletions
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4
Documentation/devicetree/bindings/rtc/rtc-omap.txt
View File

@ -16,6 +16,8 @@ Required properties:
Optional properties:
- system-power-controller: whether the rtc is controlling the system power
through pmic_power_en
- clocks: Any internal or external clocks feeding in to rtc
- clock-names: Corresponding names of the clocks
Example:
@ -26,4 +28,6 @@ rtc@1c23000 {
19>;
interrupt-parent = <&intc>;
system-power-controller;
clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
clock-names = "ext-clk", "int-clk";
};

2
arch/arm/boot/dts/am4372.dtsi
View File

@ -358,6 +358,8 @@ rtc: rtc@44e3e000 {
interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH
GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "rtc";
clocks = <&clk_32768_ck>;
clock-names = "int-clk";
status = "disabled";
};

13
arch/arm/boot/dts/am437x-gp-evm.dts
View File

@ -112,6 +112,13 @@ refclk: oscillator {
clock-frequency = <12000000>;
};
/* fixed 32k external oscillator clock */
clk_32k_rtc: clk_32k_rtc {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <32768>;
};
sound0: sound@0 {
compatible = "simple-audio-card";
simple-audio-card,name = "AM437x-GP-EVM";
@ -941,3 +948,9 @@ &mcasp1 {
tx-num-evt = <32>;
rx-num-evt = <32>;
};
&rtc {
clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
clock-names = "ext-clk", "int-clk";
status = "okay";
};

9
arch/arm/boot/dts/am437x-idk-evm.dts
View File

@ -110,6 +110,13 @@ switch@0 {
gpios = <&gpio4 2 GPIO_ACTIVE_LOW>;
};
};
/* fixed 32k external oscillator clock */
clk_32k_rtc: clk_32k_rtc {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <32768>;
};
};
&am43xx_pinmux {
@ -394,6 +401,8 @@ &cpsw_emac0 {
};
&rtc {
clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
clock-names = "ext-clk", "int-clk";
status = "okay";
};

9
arch/arm/boot/dts/am437x-sk-evm.dts
View File

@ -24,6 +24,13 @@ aliases {
display0 = &lcd0;
};
/* fixed 32k external oscillator clock */
clk_32k_rtc: clk_32k_rtc {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <32768>;
};
backlight {
compatible = "pwm-backlight";
pwms = <&ecap0 0 50000 PWM_POLARITY_INVERTED>;
@ -697,6 +704,8 @@ dpi_out: endpoint@0 {
};
&rtc {
clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
clock-names = "ext-clk", "int-clk";
status = "okay";
};