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

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>

diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
index 43a8366..bf7d11a 100644 (file)
--- a/Documentation/devicetree/bindings/rtc/rtc-omap.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
@@ -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";
 };

diff --git a/arch/arm/boot/dts/am4372.dtsi b/arch/arm/boot/dts/am4372.dtsi
index 564900b..0447c04 100644 (file)
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi
@@ -358,6 +358,8 @@
                        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";
                };
 

diff --git a/arch/arm/boot/dts/am437x-gp-evm.dts b/arch/arm/boot/dts/am437x-gp-evm.dts
index 215775d..22038f2 100644 (file)
--- a/arch/arm/boot/dts/am437x-gp-evm.dts
+++ b/arch/arm/boot/dts/am437x-gp-evm.dts
@@ -112,6 +112,13 @@
                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 @@
        tx-num-evt = <32>;
        rx-num-evt = <32>;
 };
+
+&rtc {
+       clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
+       clock-names = "ext-clk", "int-clk";
+       status = "okay";
+};

diff --git a/arch/arm/boot/dts/am437x-idk-evm.dts b/arch/arm/boot/dts/am437x-idk-evm.dts
index 3783442..af25801 100644 (file)
--- a/arch/arm/boot/dts/am437x-idk-evm.dts
+++ b/arch/arm/boot/dts/am437x-idk-evm.dts
@@ -110,6 +110,13 @@
                        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 @@
 };
 
 &rtc {
+       clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
+       clock-names = "ext-clk", "int-clk";
        status = "okay";
 };
 

diff --git a/arch/arm/boot/dts/am437x-sk-evm.dts b/arch/arm/boot/dts/am437x-sk-evm.dts
index 22af448..7da7c2d 100644 (file)
--- a/arch/arm/boot/dts/am437x-sk-evm.dts
+++ b/arch/arm/boot/dts/am437x-sk-evm.dts
@@ -24,6 +24,13 @@
                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 @@
 };
 
 &rtc {
+       clocks = <&clk_32k_rtc>, <&clk_32768_ck>;
+       clock-names = "ext-clk", "int-clk";
        status = "okay";
 };