[PATCH 1/7] Documentation: dt: brcmstb: add system PM bindings

Brian Norris
2015-06-19T00:11:30Z

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
---
.../devicetree/bindings/arm/bcm/brcm,brcmstb.txt | 142 ++++++++++++++++++++-
1 file changed, 140 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
index 430608ec09f0..94429649687e 100644
--- a/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
+++ b/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
@@ -43,8 +43,7 @@ example:
};
};

-Lastly, nodes that allow for support of SMP initialization and reboot are
-required:
+Nodes that allow for support of SMP initialization and reboot are required:

smpboot
-------
@@ -95,3 +94,142 @@ example:
compatible = "brcm,brcmstb-reboot";
syscon = <&sun_top_ctrl 0x304 0x308>;
};
+
+
+
+Power management
+----------------
+
+For power management (particularly, S2/S3/S5 system suspend), the following SoC
+components are needed:
+
+= Always-On control block (AON CTRL)
+
+This hardware provides control registers for the "always-on" (even in low-power
+modes) hardware, such as the Power Management State Machine (PMSM).
+
+Required properties:
+- compatible : should contain "brcm,brcmstb-aon-ctrl"
+- reg : the register start and length for the AON CTRL block
+
+Example:
+
+aon-ctrl at 410000 {
+ compatible = "brcm,brcmstb-aon-ctrl";
+ reg = <0x410000 0x400>;
+};
+
+= Memory controllers
+
+A Broadcom STB SoC typically has a number of independent memory controllers,
+each of which may have several associated hardware blocks, which are versioned
+independently (control registers, DDR PHYs, etc.). One might consider
+describing these controllers as a parent "memory controllers" block, which
+contains N sub-nodes (one for each controller in the system), each of which is
+associated with a number of hardware register resources (e.g., its PHY). See
+the example device tree snippet below.
+
+== MEMC (MEMory Controller)
+
+Represents a single memory controller instance.
+
+Required properties:
+- compatible : should contain "brcm,brcmstb-memc" and "simple-bus"
+
+Should contain subnodes for any of the following relevant hardware resources:
+
+== DDR PHY control
+
+Control registers for this memory controller's DDR PHY.
+
+Required properties:
+- compatible : should contain one of these
+ "brcm,brcmstb-ddr-phy-v225.1"
+ "brcm,brcmstb-ddr-phy-v240.1"
+ "brcm,brcmstb-ddr-phy-v240.2"
+
+- reg : the DDR PHY register range
+
+== DDR SHIMPHY
+
+Control registers for this memory controller's DDR SHIMPHY.
+
+Required properties:
+- compatible : should contain "brcm,brcmstb-ddr-shimphy-v1.0"
+- reg : the DDR SHIMPHY register range
+
+== MEMC DDR control
+
+Sequencer DRAM parameters and control registers. Used for Self-Refresh
+Power-Down (SRPD), among other things.
+
+Required properties:
+- compatible : should contain "brcm,brcmstb-memc-ddr"
+- reg : the MEMC DDR register range
+
+Example:
+
+memory_controllers {
+ ranges;
+ compatible = "simple-bus";
+
+ memc at 0 {
+ compatible = "brcm,brcmstb-memc", "simple-bus";
+ ranges;
+
+ ddr-phy at f1106000 {
+ compatible = "brcm,brcmstb-ddr-phy-v240.1";
+ reg = <0xf1106000 0x21c>;
+ };
+
+ shimphy at f1108000 {
+ compatible = "brcm,brcmstb-ddr-shimphy-v1.0";
+ reg = <0xf1108000 0xe4>;
+ };
+
+ memc-ddr at f1102000 {
+ reg = <0xf1102000 0x800>;
+ compatible = "brcm,brcmstb-memc-ddr";
+ };
+ };
+
+ memc at 1 {
+ compatible = "brcm,brcmstb-memc", "simple-bus";
+ ranges;
+
+ ddr-phy at f1186000 {
+ compatible = "brcm,brcmstb-ddr-phy-v240.1";
+ reg = <0xf1186000 0x21c>;
+ };
+
+ shimphy at f1188000 {
+ compatible = "brcm,brcmstb-ddr-shimphy-v1.0";
+ reg = <0xf1188000 0xe4>;
+ };
+
+ memc-ddr at f1182000 {
+ reg = <0xf1182000 0x800>;
+ compatible = "brcm,brcmstb-memc-ddr";
+ };
+ };
+
+ memc at 2 {
+ compatible = "brcm,brcmstb-memc", "simple-bus";
+ ranges;
+
+ ddr-phy at f1206000 {
+ compatible = "brcm,brcmstb-ddr-phy-v240.1";
+ reg = <0xf1206000 0x21c>;
+ };
+
+ shimphy at f1208000 {
+ compatible = "brcm,brcmstb-ddr-shimphy-v1.0";
+ reg = <0xf1208000 0xe4>;
+ };
+
+ memc-ddr at f1202000 {
+ reg = <0xf1202000 0x800>;
+ compatible = "brcm,brcmstb-memc-ddr";
+ };
+ };
+};
--
1.9.1