i2c: xlp9xx: add ACPI support for Broadcom Vulcan
Added ACPI support for the I2C controller present on Broadcom's Vulcan ARM64 processor. ACPI ID used by the controller is BRCM9007. Changed the xlp9xx_i2c_get_frequency() function to use device_property_read_u32() API so that the "clock-frequency" value can be read from _DSD in ACPI mode. Signed-off-by: NTanmay Jagdale <tanmay.jagdale@broadcom.com> Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: NWolfram Sang <wsa@the-dreams.de>
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