Commit 308607e5 authored by Tony Lindgren's avatar Tony Lindgren
Browse files

ARM: dts: Configure omap3 rng 



Looks like omap3 RNG is similar to the omap2 rng, let's get it working
by configring the dts node for it.

We must also add rng_ick to core_l4_clkdm as noted by Adam Ford.

And please note that the RNG is likely disabled on HS devices. At least
n900 does not have it accessible, and instead omap3-rom-rng driver must
be used. So let's tag RNG as disabled on n900 as noted by Pali Rohár
<pali.rohar@gmail.com>.

On am3517 at least the clocks need to be configured to get it working
as noted by Adam Ford, so let's tag it disabled for now.

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Adam Ford <aford173@gmail.com>
Cc: Pali Rohár <pali.rohar@gmail.com>
Cc: Sebastian Reichel <sre@kernel.org>
Cc: Tero Kristo <t-kristo@ti.com>
Tested-by: Adam Ford <aford173@gmail.com> #logicpd-torpedo-37xx-devkit
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 54ecb8f7

arch/arm/boot/dts/am3517.dtsi

+6 −0
Original line number Diff line number Diff line
@@ -115,6 +115,12 @@ 
	};

};



/* Not currently working, probably needs at least different clocks */

&rng_target {

	status = "disabled";

	/delete-property/ clocks;

};



/* Table Table 5-79 of the TRM shows 480ab000 is reserved */

&usb_otg_hs {

	status = "disabled";

arch/arm/boot/dts/omap3-n900.dts

+5 −0
Original line number Diff line number Diff line
@@ -1013,6 +1013,11 @@ 
	};

};



/* RNG not directly accessible on n900, see omap3-rom-rng instead */

&rng_target {

	status = "disabled";

};



&usb_otg_hs {

	interface-type = <0>;

	usb-phy = <&usb2_phy>;

arch/arm/boot/dts/omap3.dtsi

+25 −0
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 
 * kind, whether express or implied.

 */



#include <dt-bindings/bus/ti-sysc.h>

#include <dt-bindings/gpio/gpio.h>

#include <dt-bindings/interrupt-controller/irq.h>

#include <dt-bindings/pinctrl/omap.h>
@@ -502,6 +503,30 @@ 
			status = "disabled";

		};



		/* Likely needs to be tagged disabled on HS devices */

		rng_target: target-module@480a0000 {

			compatible = "ti,sysc-omap2", "ti,sysc";

			reg = <0x480a003c 0x4>,

			      <0x480a0040 0x4>,

			      <0x480a0044 0x4>;

			reg-names = "rev", "sysc", "syss";

			ti,sysc-mask = <(SYSC_OMAP2_AUTOIDLE)>;

			ti,sysc-sidle = <SYSC_IDLE_FORCE>,

					<SYSC_IDLE_NO>;

			ti,syss-mask = <1>;

			clocks = <&rng_ick>;

			clock-names = "ick";

			#address-cells = <1>;

			#size-cells = <1>;

			ranges = <0 0x480a0000 0x2000>;



			rng: rng@0 {

				compatible = "ti,omap2-rng";

				reg = <0x0 0x2000>;

				interrupts = <52>;

			};

		};



		mcbsp2: mcbsp@49022000 {

			compatible = "ti,omap3-mcbsp";

			reg = <0x49022000 0xff>,

arch/arm/boot/dts/omap34xx-omap36xx-clocks.dtsi

+1 −1
Original line number Diff line number Diff line
@@ -260,6 +260,6 @@ 
			 <&gpt10_ick>, <&mcbsp5_ick>, <&mcbsp1_ick>,

			 <&omapctrl_ick>, <&aes2_ick>, <&sha12_ick>, <&icr_ick>,

			 <&des2_ick>, <&mspro_ick>, <&mailboxes_ick>,

			 <&mspro_fck>;

			 <&rng_ick>, <&mspro_fck>;

	};

};

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