[PATCH v3] i2c: exynos5: Add bus clock support

[Wolfram Sang]

On Thu, Dec 09, 2021 at 04:03:13PM +0200, Sam Protsenko wrote:
> 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.
> 
> Add code to obtain and enable/disable PCLK in addition to already
> handled operating clock. Make it optional though, as older Exynos SoC
> variants only have one HSI2C clock.
> 
> Signed-off-by: Sam Protsenko <semen.protsenko at linaro.org>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski at canonical.com>
> Reviewed-by: Chanho Park <chanho61.park at samsung.com>

Applied to for-next, thanks!

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