[rtc-linux] [PATCH v5 1/3] ARM: dts: AM437x: Add the internal and external clock nodes for rtc
From: Keerthy <j-keerthy@ti.com>
Date: 2015-08-18 09:41:29
Subsystem:
open firmware and flattened device tree bindings, real time clock (rtc) subsystem, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Alexandre Belloni, Linus Torvalds
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> --- Documentation/devicetree/bindings/rtc/rtc-omap.txt | 4 ++++ arch/arm/boot/dts/am4372.dtsi | 2 ++ arch/arm/boot/dts/am437x-gp-evm.dts | 13 +++++++++++++ arch/arm/boot/dts/am437x-idk-evm.dts | 9 +++++++++ arch/arm/boot/dts/am437x-sk-evm.dts | 9 +++++++++ 5 files changed, 37 insertions(+)
diff --git a/Documentation/devicetree/bindings/rtc/rtc-omap.txt b/Documentation/devicetree/bindings/rtc/rtc-omap.txt
index 43a8366..bf7d11a 100644
--- 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 d99b2ee..484f092 100644
--- a/arch/arm/boot/dts/am4372.dtsi
+++ b/arch/arm/boot/dts/am4372.dtsi@@ -336,6 +336,8 @@ 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
--- 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 37834427..af25801 100644
--- 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
--- 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"; };
--
1.9.1
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