Thread (6 messages) 6 messages, 4 authors, 2024-11-08

Re: [PATCH] dt-bindings: clock: ti: Convert mux.txt to json-schema

From: Andreas Kemnade <andreas@kemnade.info>
Date: 2024-11-07 06:58:07
Also in: linux-clk, linux-omap, lkml

Am Tue, 5 Nov 2024 07:52:34 -0600
schrieb Rob Herring [off-list ref]:
On Mon, Nov 04, 2024 at 02:55:49PM +0100, Andreas Kemnade wrote:
quoted
Convert the OMAP mux clock device tree binding to json-schema.
Specify the creator of the original binding as a maintainer.
Choose GPL-only license because original binding was also GPL.

Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
---
 .../bindings/clock/ti/composite.txt           |   2 +-
 .../devicetree/bindings/clock/ti/mux.txt      |  78 -----------
 .../bindings/clock/ti/ti,mux-clock.yaml       | 123 ++++++++++++++++++
 3 files changed, 124 insertions(+), 79 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/clock/ti/mux.txt
 create mode 100644 Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml
diff --git a/Documentation/devicetree/bindings/clock/ti/composite.txt b/Documentation/devicetree/bindings/clock/ti/composite.txt
index b02f22490dcb..238e6f7d74f8 100644
--- a/Documentation/devicetree/bindings/clock/ti/composite.txt
+++ b/Documentation/devicetree/bindings/clock/ti/composite.txt
@@ -16,7 +16,7 @@ merged to this clock. The component clocks shall be of one of the
 "ti,*composite*-clock" types.
 
 [1] Documentation/devicetree/bindings/clock/clock-bindings.txt
-[2] Documentation/devicetree/bindings/clock/ti/mux.txt
+[2] Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml
 [3] Documentation/devicetree/bindings/clock/ti/ti,divider-clock.yaml
 [4] Documentation/devicetree/bindings/clock/ti/gate.txt
 
diff --git a/Documentation/devicetree/bindings/clock/ti/mux.txt b/Documentation/devicetree/bindings/clock/ti/mux.txt
deleted file mode 100644
index cd56d3c1c09f..000000000000
--- a/Documentation/devicetree/bindings/clock/ti/mux.txt
+++ /dev/null
@@ -1,78 +0,0 @@
-Binding for TI mux clock.
-
-This binding uses the common clock binding[1].  It assumes a
-register-mapped multiplexer with multiple input clock signals or
-parents, one of which can be selected as output.  This clock does not
-gate or adjust the parent rate via a divider or multiplier.
-
-By default the "clocks" property lists the parents in the same order
-as they are programmed into the register.  E.g:
-
-	clocks = <&foo_clock>, <&bar_clock>, <&baz_clock>;
-
-results in programming the register as follows:
-
-register value		selected parent clock
-0			foo_clock
-1			bar_clock
-2			baz_clock
-
-Some clock controller IPs do not allow a value of zero to be programmed
-into the register, instead indexing begins at 1.  The optional property
-"index-starts-at-one" modified the scheme as follows:
-
-register value		selected clock parent
-1			foo_clock
-2			bar_clock
-3			baz_clock
-
-The binding must provide the register to control the mux. Optionally
-the number of bits to shift the control field in the register can be
-supplied. If the shift value is missing it is the same as supplying
-a zero shift.
-
-[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
-
-Required properties:
-- compatible : shall be "ti,mux-clock" or "ti,composite-mux-clock".
-- #clock-cells : from common clock binding; shall be set to 0.
-- clocks : link phandles of parent clocks
-- reg : register offset for register controlling adjustable mux
-
-Optional properties:
-- clock-output-names : from common clock binding.
-- ti,bit-shift : number of bits to shift the bit-mask, defaults to
-  0 if not present
-- ti,index-starts-at-one : valid input select programming starts at 1, not
-  zero
-- ti,set-rate-parent : clk_set_rate is propagated to parent clock,
-  not supported by the composite-mux-clock subtype
-- ti,latch-bit : latch the mux value to HW, only needed if the register
-  access requires this. As an example, dra7x DPLL_GMAC H14 muxing
-  implements such behavior.
-
-Examples:
-
-sys_clkin_ck: sys_clkin_ck@4a306110 {
-	#clock-cells = <0>;
-	compatible = "ti,mux-clock";
-	clocks = <&virt_12000000_ck>, <&virt_13000000_ck>, <&virt_16800000_ck>, <&virt_19200000_ck>, <&virt_26000000_ck>, <&virt_27000000_ck>, <&virt_38400000_ck>;
-	reg = <0x0110>;
-	ti,index-starts-at-one;
-};
-
-abe_dpll_bypass_clk_mux_ck: abe_dpll_bypass_clk_mux_ck@4a306108 {
-	#clock-cells = <0>;
-	compatible = "ti,mux-clock";
-	clocks = <&sys_clkin_ck>, <&sys_32k_ck>;
-	ti,bit-shift = <24>;
-	reg = <0x0108>;
-};
-
-mcbsp5_mux_fck: mcbsp5_mux_fck {
-	#clock-cells = <0>;
-	compatible = "ti,composite-mux-clock";
-	clocks = <&core_96m_fck>, <&mcbsp_clks>;
-	ti,bit-shift = <4>;
-	reg = <0x02d8>;
-};
diff --git a/Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml b/Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml
new file mode 100644
index 000000000000..b271ab86dde1
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/ti/ti,mux-clock.yaml
@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: GPL-2.0-only  
Surely TI as the only author of the original binding would agree to
dual-license this?
So there is a question mark. So you are waiting for some confirmation
form TI?

Regards,
Andreas
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