From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 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> 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 List-ID: 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, }; -- 1.9.1