From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754169AbeDPMZ2 (ORCPT ); Mon, 16 Apr 2018 08:25:28 -0400 Received: from mail-wr0-f193.google.com ([209.85.128.193]:38535 "EHLO mail-wr0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753999AbeDPMZY (ORCPT ); Mon, 16 Apr 2018 08:25:24 -0400 X-Google-Smtp-Source: AIpwx49HJm3o8GicbDgBVi9V4r/Z/7HWJg4APrtcR91RHUvuz2oIfZYYZsYZ91EcxF/And+TF5HJRA== Date: Mon, 16 Apr 2018 13:25:19 +0100 From: Lee Jones To: Fabrice Gasnier Cc: thierry.reding@gmail.com, alexandre.torgue@st.com, benjamin.gaignard@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk, mcoquelin.stm32@gmail.com, benjamin.gaignard@st.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pwm@vger.kernel.org Subject: Re: [PATCH v3 5/6] pwm: stm32: use input prescaler to improve period capture Message-ID: <20180416122519.5fnnyuuel64kfjfw@dell> References: <1522404084-24903-1-git-send-email-fabrice.gasnier@st.com> <1522404084-24903-6-git-send-email-fabrice.gasnier@st.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1522404084-24903-6-git-send-email-fabrice.gasnier@st.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 30 Mar 2018, Fabrice Gasnier wrote: > Using input prescaler, capture unit will trigger DMA once every > configurable /2, /4 or /8 events (rising edge). This helps improve > period (only) capture accuracy at high rates. > > Signed-off-by: Fabrice Gasnier > Reviewed-by: Benjamin Gaignard > Acked-by: Thierry Reding > --- > Changes in v2: > - Adopt DMA read from MFD core. > --- > drivers/pwm/pwm-stm32.c | 63 ++++++++++++++++++++++++++++++++++++++-- > include/linux/mfd/stm32-timers.h | 1 + For my own reference: Acked-for-MFD-by: Lee Jones > 2 files changed, 62 insertions(+), 2 deletions(-) -- Lee Jones [李琼斯] Linaro Services Technical Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog From mboxrd@z Thu Jan 1 00:00:00 1970 From: lee.jones@linaro.org (Lee Jones) Date: Mon, 16 Apr 2018 13:25:19 +0100 Subject: [PATCH v3 5/6] pwm: stm32: use input prescaler to improve period capture In-Reply-To: <1522404084-24903-6-git-send-email-fabrice.gasnier@st.com> References: <1522404084-24903-1-git-send-email-fabrice.gasnier@st.com> <1522404084-24903-6-git-send-email-fabrice.gasnier@st.com> Message-ID: <20180416122519.5fnnyuuel64kfjfw@dell> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, 30 Mar 2018, Fabrice Gasnier wrote: > Using input prescaler, capture unit will trigger DMA once every > configurable /2, /4 or /8 events (rising edge). This helps improve > period (only) capture accuracy at high rates. > > Signed-off-by: Fabrice Gasnier > Reviewed-by: Benjamin Gaignard > Acked-by: Thierry Reding > --- > Changes in v2: > - Adopt DMA read from MFD core. > --- > drivers/pwm/pwm-stm32.c | 63 ++++++++++++++++++++++++++++++++++++++-- > include/linux/mfd/stm32-timers.h | 1 + For my own reference: Acked-for-MFD-by: Lee Jones > 2 files changed, 62 insertions(+), 2 deletions(-) -- Lee Jones [???] Linaro Services Technical Lead Linaro.org ? Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog