[PATCH 4/5] dt-bindings: mmc: Add Broadcom optional sdio_freq clock
Kamal Dasu
kdasu.kdev at gmail.com
Thu Apr 21 11:28:02 PDT 2022
The 72116B0 has improved SDIO controllers that allow the max clock
rate to be increased from a max of 100MHz to a max of 150MHz.
Optional "sdio_freq" clock is used to drive the bus clock if present
optional property "clock-frequency" specifies a base clock frequency
in Hz that overrides the base clock frequency in the CAPS registers.
Signed-off-by: Kamal Dasu <kdasu.kdev at gmail.com>
---
.../bindings/mmc/brcm,sdhci-brcmstb.yaml | 29 +++++++++++++++----
1 file changed, 24 insertions(+), 5 deletions(-)
diff --git a/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml b/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml
index dccd5ad96981..1b45a918400a 100644
--- a/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml
+++ b/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml
@@ -10,8 +10,6 @@ maintainers:
- Al Cooper <alcooperx at gmail.com>
- Florian Fainelli <f.fainelli at gmail.com>
-allOf:
- - $ref: mmc-controller.yaml#
properties:
compatible:
@@ -42,23 +40,44 @@ properties:
maxItems: 1
clocks:
- maxItems: 1
- description:
- handle to core clock for the sdhci controller.
+ minItems: 1
+ items:
+ - description: handle to core clock for the sdhci controller
+ - description: improved 150Mhz clock for sdhci controller (Optional clock)
clock-names:
+ minItems: 1
items:
- const: sw_sdio
+ - const: sdio_freq # Optional clock
+
+ clock-frequency:
+ description: Should be the frequency (in Hz) of the base controller clock
+ minimum: 400000
+ maximum: 150000000
sdhci,auto-cmd12:
type: boolean
description: Specifies that controller should use auto CMD12
+allOf:
+ - $ref: mmc-controller.yaml#
+ - if:
+ properties:
+ clock-names:
+ contains:
+ const: sdio_freq
+
+ - then:
+ required:
+ - clock-frequency
+
required:
- compatible
- reg
- interrupts
- clocks
+ - clock-names
unevaluatedProperties: false
--
2.17.1
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