6.12-stable review patch. If anyone has any objections, please let me know.
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From: David Lechner dlechner@baylibre.com
[ Upstream commit e683131e64f71e957ca77743cb3d313646157329 ]
Fix a shortcoming in the bindings that doesn't allow for a separate external clock.
The AXI PWMGEN IP block has a compile option ASYNC_CLK_EN that allows the use of an external clock for the PWM output separate from the AXI clock that runs the peripheral.
This was missed in the original bindings and so users were writing dts files where the one and only clock specified would be the external clock, if there was one, incorrectly missing the separate AXI clock.
The correct bindings are that the AXI clock is always required and the external clock is optional (must be given only when HDL compile option ASYNC_CLK_EN=1).
Fixes: 1edf2c2a2841 ("dt-bindings: pwm: Add AXI PWM generator") Cc: stable@vger.kernel.org Signed-off-by: David Lechner dlechner@baylibre.com Reviewed-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Link: https://lore.kernel.org/r/20250529-pwm-axi-pwmgen-add-external-clock-v3-2-5d... Signed-off-by: Uwe Kleine-König ukleinek@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- .../devicetree/bindings/pwm/adi,axi-pwmgen.yaml | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/pwm/adi,axi-pwmgen.yaml b/Documentation/devicetree/bindings/pwm/adi,axi-pwmgen.yaml index 45e112d0efb46..5575c58357d6e 100644 --- a/Documentation/devicetree/bindings/pwm/adi,axi-pwmgen.yaml +++ b/Documentation/devicetree/bindings/pwm/adi,axi-pwmgen.yaml @@ -30,11 +30,19 @@ properties: const: 3
clocks: - maxItems: 1 + minItems: 1 + maxItems: 2 + + clock-names: + minItems: 1 + items: + - const: axi + - const: ext
required: - reg - clocks + - clock-names
unevaluatedProperties: false
@@ -43,6 +51,7 @@ examples: pwm@44b00000 { compatible = "adi,axi-pwmgen-2.00.a"; reg = <0x44b00000 0x1000>; - clocks = <&spi_clk>; + clocks = <&fpga_clk>, <&spi_clk>; + clock-names = "axi", "ext"; #pwm-cells = <3>; };