Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 127 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/c6x/dscr.txt b/Documentation/devicetree/bindings/c6x/dscr.txt
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+Device State Configuration Registers
+------------------------------------
+
+TI C6X SoCs contain a region of miscellaneous registers which provide various
+function for SoC control or status. Details vary considerably among from SoC
+to SoC with no two being alike.
+
+In general, the Device State Configuration Registers (DSCR) will provide one or
+more configuration registers often protected by a lock register where one or
+more key values must be written to a lock register in order to unlock the
+configuration register for writes. These configuration register may be used to
+enable (and disable in some cases) SoC pin drivers, select peripheral clock
+sources (internal or pin), etc. In some cases, a configuration register is
+write once or the individual bits are write once. In addition to device config,
+the DSCR block may provide registers which are used to reset peripherals,
+provide device ID information, provide ethernet MAC addresses, as well as other
+miscellaneous functions.
+
+For device state control (enable/disable), each device control is assigned an
+id which is used by individual device drivers to control the state as needed.
+
+Required properties:
+
+- compatible: must be "ti,c64x+dscr"
+- reg: register area base and size
+
+Optional properties:
+
+  NOTE: These are optional in that not all SoCs will have all properties. For
+        SoCs which do support a given property, leaving the property out of the
+        device tree will result in reduced functionality or possibly driver
+        failure.
+
+- ti,dscr-devstat
+    offset of the devstat register
+
+- ti,dscr-silicon-rev
+    offset, start bit, and bitsize of silicon revision field
+
+- ti,dscr-rmii-resets
+    offset and bitmask of RMII reset field. May have multiple tuples if more
+    than one ethernet port is available.
+
+- ti,dscr-locked-regs
+    possibly multiple tuples describing registers which are write protected by
+    a lock register. Each tuple consists of the register offset, lock register
+    offsset, and the key value used to unlock the register.
+
+- ti,dscr-kick-regs
+    offset and key values of two "kick" registers used to write protect other
+    registers in DSCR. On SoCs using kick registers, the first key must be
+    written to the first kick register and the second key must be written to
+    the second register before other registers in the area are write-enabled.
+
+- ti,dscr-mac-fuse-regs
+    MAC addresses are contained in two registers. Each element of a MAC address
+    is contained in a single byte. This property has two tuples. Each tuple has
+    a register offset and four cells representing bytes in the register from
+    most significant to least. The value of these four cells is the MAC byte
+    index (1-6) of the byte within the register. A value of 0 means the byte
+    is unused in the MAC address.
+
+- ti,dscr-devstate-ctl-regs
+    This property describes the bitfields used to control the state of devices.
+    Each tuple describes a range of identical bitfields used to control one or
+    more devices (one bitfield per device). The layout of each tuple is:
+
+        start_id num_ids reg enable disable start_bit nbits
+
+    Where:
+        start_id is device id for the first device control in the range
+        num_ids is the number of device controls in the range
+        reg is the offset of the register holding the control bits
+        enable is the value to enable a device
+        disable is the value to disable a device (0xffffffff if cannot disable)
+        start_bit is the bit number of the first bit in the range
+        nbits is the number of bits per device control
+
+- ti,dscr-devstate-stat-regs
+    This property describes the bitfields used to provide device state status
+    for device states controlled by the DSCR. Each tuple describes a range of
+    identical bitfields used to provide status for one or more devices (one
+    bitfield per device). The layout of each tuple is:
+
+        start_id num_ids reg enable disable start_bit nbits
+
+    Where:
+        start_id is device id for the first device status in the range
+        num_ids is the number of devices covered by the range
+        reg is the offset of the register holding the status bits
+        enable is the value indicating device is enabled
+        disable is the value indicating device is disabled
+        start_bit is the bit number of the first bit in the range
+        nbits is the number of bits per device status
+
+- ti,dscr-privperm
+    Offset and default value for register used to set access privilege for
+    some SoC devices.
+
+
+Example:
+
+	device-state-config-regs@2a80000 {
+		compatible = "ti,c64x+dscr";
+		reg = <0x02a80000 0x41000>;
+
+		ti,dscr-devstat = <0>;
+		ti,dscr-silicon-rev = <8 28 0xf>;
+		ti,dscr-rmii-resets = <0x40020 0x00040000>;
+
+		ti,dscr-locked-regs = <0x40008 0x40004 0x0f0a0b00>;
+		ti,dscr-devstate-ctl-regs =
+			 <0 12 0x40008 1 0  0  2
+			  12 1 0x40008 3 0 30  2
+			  13 2 0x4002c 1 0xffffffff 0 1>;
+		ti,dscr-devstate-stat-regs =
+			<0 10 0x40014 1 0  0  3
+			 10 2 0x40018 1 0  0  3>;
+
+		ti,dscr-mac-fuse-regs = <0x700 1 2 3 4
+					 0x704 5 6 0 0>;
+
+		ti,dscr-privperm = <0x41c 0xaaaaaaaa>;
+
+		ti,dscr-kick-regs = <0x38 0x83E70B13
+				     0x3c 0x95A4F1E0>;
+	};