On Thu, 11 Mar 2021 at 18:08, Hao Wu <wuhao...@google.com> wrote: > > This patch set implements the Tachometer (a.k.a Multi Functional Timer/MFT) > device in NPCM7XX SoC. This device is used by NPCM7XX boards to measure > the RPM of PWM fans. > > To provide the RPM of a certain fan, since RPM = MAX_RPM * duty_percentage. > We convert the duty output in NPCM7XX PWM module into GPIOs and feed them > into the MFT module. > > The connection of PWM modules and fan modules are derived from their specific > Linux device trees and coded in hw/arm/npcm7xx_boards.c. > > We amend the QTest for the PWM module to include verifying the reading from > the Tachometer is correct.
Applied to target-arm.next, thanks. -- PMM
