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authorArnd Bergmann <arnd@arndb.de>2017-10-20 22:26:30 +0200
committerArnd Bergmann <arnd@arndb.de>2017-10-20 22:26:30 +0200
commit3fbef2f9f76e3abaf9a5011ead3828b860d1935e (patch)
tree892e169127319f4a08de1eebb8922bccc68af1d0 /Documentation
parent8a5776a5f49812d29fe4b2d0a2d71675c3facf3f (diff)
parent0e9b11413262ef3d64273e15f7631d9836c53c1a (diff)
downloadop-kernel-dev-3fbef2f9f76e3abaf9a5011ead3828b860d1935e.zip
op-kernel-dev-3fbef2f9f76e3abaf9a5011ead3828b860d1935e.tar.gz
Merge tag 'arm-soc/for-4.15/drivers' of http://github.com/Broadcom/stblinux into next/drivers
Pull "Broadcom drivers changes for 4.15" from Florian Fainelli: This pull requests contains Broadcom SoCs drivers updates for 4.15, please pull the following: - Markus adds support for the Broadcom STB DDR PHY frontend which supports dynamic firmware loading and offers the ability to respond with DRAM refresh rates. He also adds a proper documentation binding document for that peripheral - Brian adds support for S2/S3/S5 system suspend/resume modes on ARM-based SoCs which is not new but had been lingering for a long time. - Justin adds S2/S3 system suspend/resume modes on MIPS-based SoCs which is a bit new newer and builds on top of the ARM-based support. - Florian adds Device Tree binding documents for both ARM and MIPS based systems describing the necessary nodes for S2/S3/S5 on these SoCs. (This pull request somehow missed the 4.14 merge window and is now being sent again for 4.15 along with build fixes from Arnd). * tag 'arm-soc/for-4.15/drivers' of http://github.com/Broadcom/stblinux: soc bcm: brcmstb: Add support for S2/S3/S5 suspend states (MIPS) dt-bindings: Document MIPS Broadcom STB power management nodes soc: bcm: brcmstb: Add support for S2/S3/S5 suspend states (ARM) dt-bindings: ARM: brcmstb: Update Broadcom STB Power Management binding memory: brcmstb: Add driver for DPFE dt-bindings: Add bindings for Broadcom STB DRAM Sensors
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt6
-rw-r--r--Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.txt27
-rw-r--r--Documentation/devicetree/bindings/mips/brcm/soc.txt153
3 files changed, 185 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
index 0d0c1ae..790e6b0 100644
--- a/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
+++ b/Documentation/devicetree/bindings/arm/bcm/brcm,brcmstb.txt
@@ -164,6 +164,8 @@ Control registers for this memory controller's DDR PHY.
Required properties:
- compatible : should contain one of these
+ "brcm,brcmstb-ddr-phy-v71.1"
+ "brcm,brcmstb-ddr-phy-v72.0"
"brcm,brcmstb-ddr-phy-v225.1"
"brcm,brcmstb-ddr-phy-v240.1"
"brcm,brcmstb-ddr-phy-v240.2"
@@ -184,7 +186,9 @@ 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"
+- compatible : should contain one of these
+ "brcm,brcmstb-memc-ddr-rev-b.2.2"
+ "brcm,brcmstb-memc-ddr"
- reg : the MEMC DDR register range
Example:
diff --git a/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.txt b/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.txt
new file mode 100644
index 0000000..82d923e
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/brcm,dpfe-cpu.txt
@@ -0,0 +1,27 @@
+DDR PHY Front End (DPFE) for Broadcom STB
+=========================================
+
+DPFE and the DPFE firmware provide an interface for the host CPU to
+communicate with the DCPU, which resides inside the DDR PHY.
+
+There are three memory regions for interacting with the DCPU. These are
+specified in a single reg property.
+
+Required properties:
+ - compatible: must be "brcm,bcm7271-dpfe-cpu", "brcm,bcm7268-dpfe-cpu"
+ or "brcm,dpfe-cpu"
+ - reg: must reference three register ranges
+ - start address and length of the DCPU register space
+ - start address and length of the DCPU data memory space
+ - start address and length of the DCPU instruction memory space
+ - reg-names: must contain "dpfe-cpu", "dpfe-dmem", and "dpfe-imem";
+ they must be in the same order as the register declarations
+
+Example:
+ dpfe_cpu0: dpfe-cpu@f1132000 {
+ compatible = "brcm,bcm7271-dpfe-cpu", "brcm,dpfe-cpu";
+ reg = <0xf1132000 0x180
+ 0xf1134000 0x1000
+ 0xf1138000 0x4000>;
+ reg-names = "dpfe-cpu", "dpfe-dmem", "dpfe-imem";
+ };
diff --git a/Documentation/devicetree/bindings/mips/brcm/soc.txt b/Documentation/devicetree/bindings/mips/brcm/soc.txt
index e4e1cd9..356c297 100644
--- a/Documentation/devicetree/bindings/mips/brcm/soc.txt
+++ b/Documentation/devicetree/bindings/mips/brcm/soc.txt
@@ -11,3 +11,156 @@ Required properties:
The experimental -viper variants are for running Linux on the 3384's
BMIPS4355 cable modem CPU instead of the BMIPS5000 application processor.
+
+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 be one of
+ "brcm,bcm7425-aon-ctrl"
+ "brcm,bcm7429-aon-ctrl"
+ "brcm,bcm7435-aon-ctrl" and
+ "brcm,brcmstb-aon-ctrl"
+- reg : the register start and length for the AON CTRL block
+
+Example:
+
+syscon@410000 {
+ compatible = "brcm,bcm7425-aon-ctrl", "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.
+
+== MEMC (MEMory Controller)
+
+Represents a single memory controller instance.
+
+Required properties:
+- compatible : should contain "brcm,brcmstb-memc" and "simple-bus"
+- ranges : should contain the child address in the parent address
+ space, must be 0 here, and the register start and length of
+ the entire memory controller (including all sub nodes: DDR PHY,
+ arbiter, etc.)
+- #address-cells : must be 1
+- #size-cells : must be 1
+
+Example:
+
+ memory-controller@0 {
+ compatible = "brcm,brcmstb-memc", "simple-bus";
+ ranges = <0x0 0x0 0xa000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ memc-arb@1000 {
+ ...
+ };
+
+ memc-ddr@2000 {
+ ...
+ };
+
+ ddr-phy@6000 {
+ ...
+ };
+ };
+
+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-v64.5"
+ "brcm,brcmstb-ddr-phy"
+
+- reg : the DDR PHY register range and length
+
+Example:
+
+ ddr-phy@6000 {
+ compatible = "brcm,brcmstb-ddr-phy-v64.5";
+ reg = <0x6000 0xc8>;
+ };
+
+== DDR memory controller sequencer
+
+Control registers for this memory controller's DDR memory sequencer
+
+Required properties:
+- compatible : should contain one of these
+ "brcm,bcm7425-memc-ddr"
+ "brcm,bcm7429-memc-ddr"
+ "brcm,bcm7435-memc-ddr" and
+ "brcm,brcmstb-memc-ddr"
+
+- reg : the DDR sequencer register range and length
+
+Example:
+
+ memc-ddr@2000 {
+ compatible = "brcm,bcm7425-memc-ddr", "brcm,brcmstb-memc-ddr";
+ reg = <0x2000 0x300>;
+ };
+
+== MEMC Arbiter
+
+The memory controller arbiter is responsible for memory clients allocation
+(bandwidth, priorities etc.) and needs to have its contents restored during
+deep sleep states (S3).
+
+Required properties:
+
+- compatible : should contain one of these
+ "brcm,brcmstb-memc-arb-v10.0.0.0"
+ "brcm,brcmstb-memc-arb"
+
+- reg : the DDR Arbiter register range and length
+
+Example:
+
+ memc-arb@1000 {
+ compatible = "brcm,brcmstb-memc-arb-v10.0.0.0";
+ reg = <0x1000 0x248>;
+ };
+
+== Timers
+
+The Broadcom STB chips contain a timer block with several general purpose
+timers that can be used.
+
+Required properties:
+
+- compatible : should contain one of:
+ "brcm,bcm7425-timers"
+ "brcm,bcm7429-timers"
+ "brcm,bcm7435-timers and
+ "brcm,brcmstb-timers"
+- reg : the timers register range
+- interrupts : the interrupt line for this timer block
+
+Example:
+
+ timers: timer@4067c0 {
+ compatible = "brcm,bcm7425-timers", "brcm,brcmstb-timers";
+ reg = <0x4067c0 0x40>;
+ interrupts = <&periph_intc 19>;
+ };
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