@@ -30,6 +30,20 @@ description: |
3 -- OUT3
4 -- OUT4
+ The idt,shutdown and idt,output-enable-active properties control the
+ SH (en_global_shutdown) and SP bits of the Primary Source and Shutdown
+ Register, respectively. Their behavior is summarized by the following
+ table:
+
+ SH SP Output when the SD/OE pin is Low/High
+ == == =====================================
+ 0 0 Active/Inactive
+ 0 1 Inactive/Active
+ 1 0 Active/Shutdown
+ 1 1 Inactive/Shutdown
+
+ The case where SH and SP are both 1 is likely not very interesting.
+
maintainers:
- Luca Ceresoli <luca@lucaceresoli.net>
@@ -64,6 +78,26 @@ properties:
maximum: 22760
description: Optional load capacitor for XTAL1 and XTAL2
+ idt,shutdown:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1]
+ description: |
+ If 1, this enables the shutdown functionality: the chip will be
+ shut down if the SD/OE pin is driven high. If 0, this disables the
+ shutdown functionality: the chip will never be shut down based on
+ the value of the SD/OE pin. This property corresponds to the SH
+ bit of the Primary Source and Shutdown Register.
+
+ idt,output-enable-active:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1]
+ description: |
+ If 1, this enables output when the SD/OE pin is high, and disables
+ output when the SD/OE pin is low. If 0, this disables output when
+ the SD/OE pin is high, and enables output when the SD/OE pin is
+ low. This corresponds to the SP bit of the Primary Source and
+ Shutdown Register.
+
patternProperties:
"^OUT[1-4]$":
type: object
@@ -89,6 +123,8 @@ required:
- compatible
- reg
- '#clock-cells'
+ - idt,shutdown
+ - idt,output-enable-active
allOf:
- if:
@@ -138,6 +174,10 @@ examples:
clocks = <&ref25m>;
clock-names = "xin";
+ /* Set the SD/OE pin's settings */
+ idt,shutdown = <0>;
+ idt,output-enable-active = <0>;
+
OUT1 {
idt,drive-mode = <VC5_CMOSD>;
idt,voltage-microvolts = <1800000>;
These properties allow configuring the SD/OE pin as described in the datasheet. Signed-off-by: Sean Anderson <sean.anderson@seco.com> --- Changes in v6: - Use tri-state properties Changes in v5: - Don't use dummy if's for oneOfs under allOfs Changes in v4: - Specify that bindings should specify these properties, but don't make any guarantees about the driver's behavior when they are not present. - Clarify description of idt,(en|dis)able-shutdown properties. - Make opposing properties mutually exclusive. - Add these properties to the example. Changes in v3: - Add idt,disable-shutdown and idt,output-enable-active-low to allow for a default of not changing the SP/SH bits at all. Changes in v2: - Rename idt,sd-active-high to idt,output-enable-active-high - Add idt,enable-shutdown .../bindings/clock/idt,versaclock5.yaml | 40 +++++++++++++++++++ 1 file changed, 40 insertions(+)