[PATCH v2 RESEND 3/8] dt-bindings: i2c: exynos5: Add bus clock
From: Sam Protsenko <semen.protsenko@linaro.org>
Date: 2021-12-04 21:58:49
Also in:
linux-arm-kernel, linux-i2c, linux-samsung-soc, lkml
Subsystem:
i2c subsystem host drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Andi Shyti, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
In new Exynos SoCs (like Exynos850) where HSI2C is implemented as a part of USIv2 block, there are two clocks provided to HSI2C controller: - PCLK: bus clock (APB), provides access to register interface - IPCLK: operating IP-core clock; SCL is derived from this one Both clocks have to be asserted for HSI2C to be functional in that case. Modify bindings doc to allow specifying bus clock in addition to already described operating clock. Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org> --- Changes in v2: - Added 'clock-names' property to 'required:' in case of ExynosAutoV9 - Added example for two clocks case .../devicetree/bindings/i2c/i2c-exynos5.yaml | 59 +++++++++++++++++-- 1 file changed, 53 insertions(+), 6 deletions(-)
diff --git a/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml b/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml
index bb6c22fbc442..19874e8b73b9 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml
+++ b/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml@@ -18,9 +18,6 @@ description: | define USI node in device tree file, choosing "i2c" configuration. Please see Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml for details. -allOf: - - $ref: /schemas/i2c/i2c-controller.yaml# - properties: compatible: oneOf:
@@ -49,11 +46,16 @@ properties: clock-frequency is >= 1MHz. clocks: - maxItems: 1 - description: I2C operating clock + minItems: 1 + items: + - description: I2C operating clock + - description: Bus clock (APB) clock-names: - const: hsi2c + minItems: 1 + items: + - const: hsi2c + - const: hsi2c_pclk required: - compatible
@@ -61,6 +63,31 @@ required: - interrupts - clocks +allOf: + - $ref: /schemas/i2c/i2c-controller.yaml# + - if: + properties: + compatible: + contains: + enum: + - samsung,exynosautov9-hsi2c + + then: + properties: + clocks: + minItems: 2 + + clock-names: + minItems: 2 + + required: + - clock-names + + else: + properties: + clocks: + maxItems: 1 + unevaluatedProperties: false examples:
@@ -84,3 +111,23 @@ examples: reg = <0x66>; }; }; + + - | + #include <dt-bindings/clock/exynos850.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + + hsi2c_2: i2c@138c0000 { + compatible = "samsung,exynosautov9-hsi2c"; + reg = <0x138c0000 0xc0>; + interrupts = <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>; + #address-cells = <1>; + #size-cells = <0>; + clocks = <&cmu_peri CLK_GOUT_HSI2C2_IPCLK>, + <&cmu_peri CLK_GOUT_HSI2C2_PCLK>; + clock-names = "hsi2c", "hsi2c_pclk"; + + pmic@66 { + /* compatible = "samsung,s2mps11-pmic"; */ + reg = <0x66>; + }; + };
--
2.30.2