From patchwork Fri Dec 7 08:29:30 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 10717629 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D362E1750 for ; Fri, 7 Dec 2018 08:32:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C4C1A2E830 for ; Fri, 7 Dec 2018 08:32:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B8F3C2E846; Fri, 7 Dec 2018 08:32:04 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 65D812E830 for ; Fri, 7 Dec 2018 08:32:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726041AbeLGIcE (ORCPT ); Fri, 7 Dec 2018 03:32:04 -0500 Received: from relmlor2.renesas.com ([210.160.252.172]:61244 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726003AbeLGIcD (ORCPT ); Fri, 7 Dec 2018 03:32:03 -0500 X-IronPort-AV: E=Sophos;i="5.56,324,1539615600"; d="scan'208";a="2005528" Received: from unknown (HELO relmlir6.idc.renesas.com) ([10.200.68.152]) by relmlie6.idc.renesas.com with ESMTP; 07 Dec 2018 17:32:00 +0900 Received: from localhost.localdomain (unknown [10.166.17.210]) by relmlir6.idc.renesas.com (Postfix) with ESMTP id 4C8E04A77D2F; Fri, 7 Dec 2018 17:32:00 +0900 (JST) From: Yoshihiro Shimoda To: thierry.reding@gmail.com Cc: linux-pwm@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH 2/5] pwm: rcar: Add support "atomic" API Date: Fri, 7 Dec 2018 17:29:30 +0900 Message-Id: <1544171373-29618-3-git-send-email-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1544171373-29618-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> References: <1544171373-29618-1-git-send-email-yoshihiro.shimoda.uh@renesas.com> Sender: linux-renesas-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support for "atomic" API. Behavior is the same as when using legacy APIs. Signed-off-by: Yoshihiro Shimoda --- drivers/pwm/pwm-rcar.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/pwm/pwm-rcar.c b/drivers/pwm/pwm-rcar.c index 9cf4567..a5ea0f3 100644 --- a/drivers/pwm/pwm-rcar.c +++ b/drivers/pwm/pwm-rcar.c @@ -200,12 +200,44 @@ static void rcar_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm) rcar_pwm_update(rp, RCAR_PWMCR_EN0, 0, RCAR_PWMCR); } +static int rcar_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, + struct pwm_state *state) +{ + struct rcar_pwm_chip *rp = to_rcar_pwm_chip(chip); + int div, ret; + + div = rcar_pwm_get_clock_division(rp, state->period); + if (div < 0) + return div; + + rcar_pwm_update(rp, RCAR_PWMCR_SYNC, RCAR_PWMCR_SYNC, RCAR_PWMCR); + + rcar_pwm_calc_counter(rp, div, state->duty_cycle, state->period); + ret = rcar_pwm_set_counter(rp); + if (!ret) + rcar_pwm_set_clock_control(rp, div); + + /* The SYNC should be set to 0 even if rcar_pwm_set_counter failed */ + rcar_pwm_update(rp, RCAR_PWMCR_SYNC, 0, RCAR_PWMCR); + + if (!ret && state->enabled) + ret = rcar_pwm_enable(chip, pwm); + + if (!state->enabled) { + rcar_pwm_disable(chip, pwm); + ret = 0; + } + + return ret; +} + static const struct pwm_ops rcar_pwm_ops = { .request = rcar_pwm_request, .free = rcar_pwm_free, .config = rcar_pwm_config, .enable = rcar_pwm_enable, .disable = rcar_pwm_disable, + .apply = rcar_pwm_apply, .owner = THIS_MODULE, };