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2021-08-17hwmon: Add support for SB-RMI power moduleAkshay Gupta1-0/+359
On AMD platforms the Out-of-band access is provided by Advanced Platform Management Link (APML), APML is a SMBus v2.0 compatible 2-wire processor client interface. APML is also referred as the sideband interface (SBI). APML is used to communicate with the Side-Band Remote Management Interface (SB-RMI) which provides Soft Mailbox messages to manage power consumption and power limits of the CPU socket. - This module add support to read power consumption, power limit & max power limit and write power limit. - To instantiate this driver on a Board Management Controller (BMC) connected to an AMD CPU with SB-RMI support, the i2c bus number would be the bus connected from the BMC to the CPU. Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Akshay Gupta <Akshay.Gupta@amd.com> Signed-off-by: Naveen Krishna Chatradhi <nchatrad@amd.com> Link: https://lore.kernel.org/r/20210726133615.9709-1-nchatrad@amd.com [groeck: Fix uninitialized variable problem when reporting max power] Signed-off-by: Guenter Roeck <linux@roeck-us.net>