linux-kernel - [PATCH 2/5] pwm: rockchip: Remove the judge from return value of rockchip_pwm

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Message-Id: <1498739271-27431-3-git-send-email-david.wu@rock-chips.com>
Date:   Thu, 29 Jun 2017 20:27:48 +0800
From:   David Wu <david.wu@...k-chips.com>
To:     thierry.reding@...il.com, heiko@...ech.de,
        boris.brezillon@...e-electrons.com, robh+dt@...nel.org
Cc:     catalin.marinas@....com, briannorris@...omium.org,
        dianders@...omium.org, mark.rutland@....com,
        huangtao@...k-chips.com, linux-pwm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, David Wu <david.wu@...k-chips.com>
Subject: [PATCH 2/5] pwm: rockchip: Remove the judge from return value of rockchip_pwm_config()

It seems the rockchip_pwm_config always returns the result 0,
so remove the judge.

Signed-off-by: David Wu <david.wu@...k-chips.com>
---
 drivers/pwm/pwm-rockchip.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/pwm/pwm-rockchip.c b/drivers/pwm/pwm-rockchip.c
index 617824c..cd45f17 100644
--- a/drivers/pwm/pwm-rockchip.c
+++ b/drivers/pwm/pwm-rockchip.c
@@ -165,7 +165,7 @@ static void rockchip_pwm_get_state(struct pwm_chip *chip,
 	clk_disable(pc->pclk);
 }
 
-static int rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
+static void rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 			       int duty_ns, int period_ns)
 {
 	struct rockchip_pwm_chip *pc = to_rockchip_pwm_chip(chip);
@@ -188,8 +188,6 @@ static int rockchip_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 
 	writel(period, pc->base + pc->data->regs.period);
 	writel(duty, pc->base + pc->data->regs.duty);
-
-	return 0;
 }
 
 static int rockchip_pwm_enable(struct pwm_chip *chip,
@@ -236,13 +234,7 @@ static int rockchip_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 		enabled = false;
 	}
 
-	ret = rockchip_pwm_config(chip, pwm, state->duty_cycle, state->period);
-	if (ret) {
-		if (enabled != curstate.enabled)
-			rockchip_pwm_enable(chip, pwm, !enabled,
-				      state->polarity);
-		goto out;
-	}
+	rockchip_pwm_config(chip, pwm, state->duty_cycle, state->period);
 
 	if (state->enabled != enabled) {
 		ret = rockchip_pwm_enable(chip, pwm, state->enabled,
-- 
1.9.1