redonkable/alistair23-linux
redonkable/alistair23-linux
1
0
Fork 0
Code Releases Activity

ARM: dts: Configure omap3 rng

Browse source 
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: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2019-10-23 11:39:42 -07:00
parent 54ecb8f702
commit 308607e554
4 changed files with 37 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
arch/arm/boot/dts/am3517.dtsi
View file

@ -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";

5
arch/arm/boot/dts/omap3-n900.dts
View file

@ -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>;

25
arch/arm/boot/dts/omap3.dtsi
View file

@ -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>,

2
arch/arm/boot/dts/omap34xx-omap36xx-clocks.dtsi
View file

@ -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>;
};
};