From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751217AbdA2Vzd (ORCPT ); Sun, 29 Jan 2017 16:55:33 -0500 Received: from mail-out.m-online.net ([212.18.0.9]:59578 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750759AbdA2VzG (ORCPT ); Sun, 29 Jan 2017 16:55:06 -0500 X-Auth-Info: W8D2X/4FfSgcseWT44+S2TKEJ2Ev3+WWxk6rIXw/M0k= From: Lukasz Majewski To: Thierry Reding , Sascha Hauer , Stefan Agner , Boris Brezillon , linux-pwm@vger.kernel.org, Bhuvanchandra DV , linux-kernel@vger.kernel.org Cc: Lothar Wassmann , kernel@pengutronix.de, Fabio Estevam , Lukasz Majewski Subject: [PATCH v5 00/11] pwm: imx: Provide atomic operation for IMX PWM driver Date: Sun, 29 Jan 2017 22:54:04 +0100 Message-Id: <1485726855-16236-1-git-send-email-lukma@denx.de> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch set brings atomic operation to i.MX's PWMv2 driver. This work has been supported and suggested by Boris Brezillon [1] and Stefan Agner, by showing how simple the transition could be :-) (in theory). It has been divided into several steps: - Remove ipg clock and enable per clock when required (as proposed by Boris Brezillon) - Provide different pwm ops for PWMv1 and PWMv2 - Separate PWMv1 commits from "generic" and non atomic PWM code NOTE: Since I do _not_ have board with PWMv1, I would like to ask somebody for testing - Move some imx_config_v2 code to separate functions - Provide PWM atomic implementation (the ->apply() driver) for PWMv2 in a single patch for better readability. This patch also includes some code to address potential issues on i.MX7 (lack of peripheral clock when accessing PWM registers). - Remove redundant PWM code (disable, enable, config callbacks) - Update proper documentation entries - Provide support for polarity inversion on top of atomic PWM rework Test HW: -------- This patch set has been tested on i.MX6q board with v4.10-rc5 kernel SHA1: 1b1bc42c1692e9b62756323c675a44cb1a1f9dbd The PWM operation has been tested with pwm_bl backlight driver by changing its brightness. [1]: http://patchwork.ozlabs.org/patch/685402/ Lothar Wassmann (2): pwm: print error messages with pr_err() instead of pr_debug() pwm: core: make the PWM_POLARITY flag in DTB optional Lukasz Majewski (8): pwm: imx: Add separate set of pwm ops for PWMv1 and PWMv2 pwm: imx: Rewrite imx_pwm_*_v1 code to facilitate switch to atomic pwm operation pwm: imx: Move PWMv2 software reset code to a separate function pwm: imx: Move PWMv2 wait for fifo slot code to a separate function pwm: imx: Provide atomic PWM support for i.MX PWMv2 pwm: imx: Remove redundant i.MX PWMv2 code pwm: imx: doc: Update imx-pwm.txt documentation entry pwm: imx: Add polarity inversion support to i.MX's PWMv2 Sascha Hauer (1): pwm: imx: remove ipg clock and enable per clock when required Documentation/devicetree/bindings/pwm/imx-pwm.txt | 6 +- drivers/pwm/core.c | 26 ++- drivers/pwm/pwm-imx.c | 269 ++++++++++------------ 3 files changed, 145 insertions(+), 156 deletions(-) -- 2.1.4