[PATCH] ARM: dts: AM4372: clk: efuse based crystal frequency detect

[PATCH] ARM: dts: AM4372: clk: efuse based crystal frequency detect

[Sekhar Nori]

From: Afzal Mohammed <afzal@ti.com>

Currently oscillator frequency is determined based on sysboot settings,
it may not be the case always. To determine it properly, efuse settings
also has to be read. CONTROL_STATUS register holds this information.
Bit 31:	if 0, frequency to be determined based on sysboot
	if 1, frequency to be determined based on efuse
Bit 29,30 - for efuse detection of frequency
Bit 22,23 - for sysboot detection of frequency

Add clock nodes (mux) to determine oscillator frequency as above.

Signed-off-by: Afzal Mohammed <afzal@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
---
 arch/arm/boot/dts/am43xx-clocks.dtsi |   16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/am43xx-clocks.dtsi b/arch/arm/boot/dts/am43xx-clocks.dtsi
index 142009c..71b029c 100644
--- a/arch/arm/boot/dts/am43xx-clocks.dtsi
+++ b/arch/arm/boot/dts/am43xx-clocks.dtsi
@@ -11,6 +11,22 @@
 	sys_clkin_ck: sys_clkin_ck {
 		#clock-cells = <0>;
 		compatible = "ti,mux-clock";
+		clocks = <&sysboot_freq_sel_ck>, <&crystal_freq_sel_ck>;
+		ti,bit-shift = <31>;
+		reg = <0x0040>;
+	};
+
+	crystal_freq_sel_ck: crystal_freq_sel_ck {
+		#clock-cells = <0>;
+		compatible = "ti,mux-clock";
+		clocks = <&virt_19200000_ck>, <&virt_24000000_ck>, <&virt_25000000_ck>, <&virt_26000000_ck>;
+		ti,bit-shift = <29>;
+		reg = <0x0040>;
+	};
+
+	sysboot_freq_sel_ck: sysboot_freq_sel_ck@44e10040 {
+		#clock-cells = <0>;
+		compatible = "ti,mux-clock";
 		clocks = <&virt_19200000_ck>, <&virt_24000000_ck>, <&virt_25000000_ck>, <&virt_26000000_ck>;
 		ti,bit-shift = <22>;
 		reg = <0x0040>;
-- 
1.7.10.1

Re: [PATCH] ARM: dts: AM4372: clk: efuse based crystal frequency detect

[Tero Kristo]

On 05/14/2014 02:36 PM, Sekhar Nori wrote:
> From: Afzal Mohammed <afzal@ti.com>
>
> Currently oscillator frequency is determined based on sysboot settings,
> it may not be the case always. To determine it properly, efuse settings
> also has to be read. CONTROL_STATUS register holds this information.
> Bit 31:	if 0, frequency to be determined based on sysboot
> 	if 1, frequency to be determined based on efuse
> Bit 29,30 - for efuse detection of frequency
> Bit 22,23 - for sysboot detection of frequency
>
> Add clock nodes (mux) to determine oscillator frequency as above.
>
> Signed-off-by: Afzal Mohammed <afzal@ti.com>
> Acked-by: Tero Kristo <t-kristo@ti.com>
> Signed-off-by: Sekhar Nori <nsekhar@ti.com>

Thanks, queued for 3.16.

-Tero

> ---
>   arch/arm/boot/dts/am43xx-clocks.dtsi |   16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm/boot/dts/am43xx-clocks.dtsi b/arch/arm/boot/dts/am43xx-clocks.dtsi
> index 142009c..71b029c 100644
> --- a/arch/arm/boot/dts/am43xx-clocks.dtsi
> +++ b/arch/arm/boot/dts/am43xx-clocks.dtsi
> @@ -11,6 +11,22 @@
>   	sys_clkin_ck: sys_clkin_ck {
>   		#clock-cells = <0>;
>   		compatible = "ti,mux-clock";
> +		clocks = <&sysboot_freq_sel_ck>, <&crystal_freq_sel_ck>;
> +		ti,bit-shift = <31>;
> +		reg = <0x0040>;
> +	};
> +
> +	crystal_freq_sel_ck: crystal_freq_sel_ck {
> +		#clock-cells = <0>;
> +		compatible = "ti,mux-clock";
> +		clocks = <&virt_19200000_ck>, <&virt_24000000_ck>, <&virt_25000000_ck>, <&virt_26000000_ck>;
> +		ti,bit-shift = <29>;
> +		reg = <0x0040>;
> +	};
> +
> +	sysboot_freq_sel_ck: sysboot_freq_sel_ck@44e10040 {
> +		#clock-cells = <0>;
> +		compatible = "ti,mux-clock";
>   		clocks = <&virt_19200000_ck>, <&virt_24000000_ck>, <&virt_25000000_ck>, <&virt_26000000_ck>;
>   		ti,bit-shift = <22>;
>   		reg = <0x0040>;
>