From 62cd5e86031415843b8a0429ec05cca11b528902 Mon Sep 17 00:00:00 2001 From: Zheng Bao Date: Thu, 25 Aug 2022 17:11:38 +0800 Subject: soc/amd: Recalculate the field power in PSS table entry Being divided by 1000 causes data loss and the loss is expand by muliplication. So we just set a lower divisor before muliplication. BUG=b:185922528 Change-Id: Ib43103cc62c18debea3fd2c23d9c30fb0ecd781b Signed-off-by: Zheng Bao Reviewed-on: https://review.coreboot.org/c/coreboot/+/67050 Tested-by: build bot (Jenkins) Reviewed-by: Matt DeVillier Reviewed-by: Raul Rangel Reviewed-by: Felix Held --- src/soc/amd/picasso/acpi.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'src/soc/amd/picasso/acpi.c') diff --git a/src/soc/amd/picasso/acpi.c b/src/soc/amd/picasso/acpi.c index 9c798caffd..d075e052be 100644 --- a/src/soc/amd/picasso/acpi.c +++ b/src/soc/amd/picasso/acpi.c @@ -203,16 +203,17 @@ static uint32_t get_pstate_core_power(msr_t pstate_def) } /* Power in mW */ - power_in_mw = (voltage_in_uvolts) / 1000 * current_value_amps; + power_in_mw = (voltage_in_uvolts) / 10 * current_value_amps; switch (current_divisor) { case 0: + power_in_mw = power_in_mw / 100L; break; case 1: - power_in_mw = power_in_mw / 10L; + power_in_mw = power_in_mw / 1000L; break; case 2: - power_in_mw = power_in_mw / 100L; + power_in_mw = power_in_mw / 10000L; break; case 3: /* current_divisor is set to an undefined value.*/ -- cgit v1.2.3