ARM: dts: omap: Add reset/idle on init bindings for OMAP
On OMAP we have co-processor IPs, memory controllers,
GPIOs which control regulators and power switches to
PMIC, and SoC internal Bus IPs, some or most of which
should either not be reset or idled or both at init.
(In some cases there are erratas which prevent an IP
from being reset)
Have a way to pass this information from DT.
Update the am33xx/omap4 and omap5 dtsi files with the
new bindings for modules which either should not be
idled. reset or both. A later patch would cleanup the
same information that exists today as part of the hwmod
data files.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>
diff --git a/Documentation/devicetree/bindings/arm/omap/omap.txt b/Documentation/devicetree/bindings/arm/omap/omap.txt
index 91b7049..808c154 100644
--- a/Documentation/devicetree/bindings/arm/omap/omap.txt
+++ b/Documentation/devicetree/bindings/arm/omap/omap.txt
@@ -21,7 +21,8 @@
Optional properties:
- ti,no_idle_on_suspend: When present, it prevents the PM to idle the module
during suspend.
-
+- ti,no-reset-on-init: When present, the module should not be reset at init
+- ti,no-idle-on-init: When present, the module should not be idled at init
Example:
diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 7db3c81..58cf5b9 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -674,6 +674,7 @@
reg = <0x44d00000 0x4000 /* M3 UMEM */
0x44d80000 0x2000>; /* M3 DMEM */
ti,hwmods = "wkup_m3";
+ ti,no-reset-on-init;
};
elm: elm@48080000 {
@@ -713,6 +714,7 @@
gpmc: gpmc@50000000 {
compatible = "ti,am3352-gpmc";
ti,hwmods = "gpmc";
+ ti,no-idle-on-init;
reg = <0x50000000 0x2000>;
interrupts = <100>;
gpmc,num-cs = <7>;
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
index 6be1f56..6ca45b0 100644
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -214,6 +214,7 @@
gpmc,num-cs = <8>;
gpmc,num-waitpins = <4>;
ti,hwmods = "gpmc";
+ ti,no-idle-on-init;
};
uart1: serial@4806a000 {
@@ -492,6 +493,7 @@
reg = <0x4c000000 0x100>;
interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "emif1";
+ ti,no-idle-on-init;
phy-type = <1>;
hw-caps-read-idle-ctrl;
hw-caps-ll-interface;
@@ -503,6 +505,7 @@
reg = <0x4d000000 0x100>;
interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;
ti,hwmods = "emif2";
+ ti,no-idle-on-init;
phy-type = <1>;
hw-caps-read-idle-ctrl;
hw-caps-ll-interface;
diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 6a558ce..f518ec6 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -606,6 +606,7 @@
emif1: emif@4c000000 {
compatible = "ti,emif-4d5";
ti,hwmods = "emif1";
+ ti,no-idle-on-init;
phy-type = <2>; /* DDR PHY type: Intelli PHY */
reg = <0x4c000000 0x400>;
interrupts = <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
@@ -617,6 +618,7 @@
emif2: emif@4d000000 {
compatible = "ti,emif-4d5";
ti,hwmods = "emif2";
+ ti,no-idle-on-init;
phy-type = <2>; /* DDR PHY type: Intelli PHY */
reg = <0x4d000000 0x400>;
interrupts = <GIC_SPI 111 IRQ_TYPE_LEVEL_HIGH>;