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From: Jitao Shi <jitao.shi@mediatek.com>
To: Thierry Reding <thierry.reding@gmail.com>,
	Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	<linux-pwm@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	CK Hu <ck.hu@mediatek.com>
Cc: Jitao Shi <jitao.shi@mediatek.com>,
	sj.huang@mediatek.com, linux-mediatek@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/2] pwm: fine tune pwm-mtk-disp clock control flow
Date: Mon, 16 Dec 2019 15:01:22 +0800	[thread overview]
Message-ID: <20191216070123.114719-2-jitao.shi@mediatek.com> (raw)
In-Reply-To: <20191216070123.114719-1-jitao.shi@mediatek.com>

Match pwm clock when suspend and resume.
Prepare and enable disp_pwm clock when disp_pwm enable.
Disable and unprepare disp_pwm clock when disp_pwm disable.

Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
---
 drivers/pwm/pwm-mtk-disp.c | 43 +++++++++++---------------------------
 1 file changed, 12 insertions(+), 31 deletions(-)

diff --git a/drivers/pwm/pwm-mtk-disp.c b/drivers/pwm/pwm-mtk-disp.c
index 83b8be0209b7..c7b14acc9316 100644
--- a/drivers/pwm/pwm-mtk-disp.c
+++ b/drivers/pwm/pwm-mtk-disp.c
@@ -98,13 +98,13 @@ static int mtk_disp_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 	high_width = div64_u64(rate * duty_ns, div);
 	value = period | (high_width << PWM_HIGH_WIDTH_SHIFT);
 
-	err = clk_enable(mdp->clk_main);
+	err = clk_prepare_enable(mdp->clk_main);
 	if (err < 0)
 		return err;
 
-	err = clk_enable(mdp->clk_mm);
+	err = clk_prepare_enable(mdp->clk_mm);
 	if (err < 0) {
-		clk_disable(mdp->clk_main);
+		clk_disable_unprepare(mdp->clk_main);
 		return err;
 	}
 
@@ -124,8 +124,8 @@ static int mtk_disp_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,
 					 0x0);
 	}
 
-	clk_disable(mdp->clk_mm);
-	clk_disable(mdp->clk_main);
+	clk_disable_unprepare(mdp->clk_mm);
+	clk_disable_unprepare(mdp->clk_main);
 
 	return 0;
 }
@@ -135,13 +135,13 @@ static int mtk_disp_pwm_enable(struct pwm_chip *chip, struct pwm_device *pwm)
 	struct mtk_disp_pwm *mdp = to_mtk_disp_pwm(chip);
 	int err;
 
-	err = clk_enable(mdp->clk_main);
+	err = clk_prepare_enable(mdp->clk_main);
 	if (err < 0)
 		return err;
 
-	err = clk_enable(mdp->clk_mm);
+	err = clk_prepare_enable(mdp->clk_mm);
 	if (err < 0) {
-		clk_disable(mdp->clk_main);
+		clk_disable_unprepare(mdp->clk_main);
 		return err;
 	}
 
@@ -158,8 +158,8 @@ static void mtk_disp_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
 	mtk_disp_pwm_update_bits(mdp, DISP_PWM_EN, mdp->data->enable_mask,
 				 0x0);
 
-	clk_disable(mdp->clk_mm);
-	clk_disable(mdp->clk_main);
+	clk_disable_unprepare(mdp->clk_mm);
+	clk_disable_unprepare(mdp->clk_main);
 }
 
 static const struct pwm_ops mtk_disp_pwm_ops = {
@@ -194,14 +194,6 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev)
 	if (IS_ERR(mdp->clk_mm))
 		return PTR_ERR(mdp->clk_mm);
 
-	ret = clk_prepare(mdp->clk_main);
-	if (ret < 0)
-		return ret;
-
-	ret = clk_prepare(mdp->clk_mm);
-	if (ret < 0)
-		goto disable_clk_main;
-
 	mdp->chip.dev = &pdev->dev;
 	mdp->chip.ops = &mtk_disp_pwm_ops;
 	mdp->chip.base = -1;
@@ -210,7 +202,7 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev)
 	ret = pwmchip_add(&mdp->chip);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "pwmchip_add() failed: %d\n", ret);
-		goto disable_clk_mm;
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, mdp);
@@ -229,24 +221,13 @@ static int mtk_disp_pwm_probe(struct platform_device *pdev)
 	}
 
 	return 0;
-
-disable_clk_mm:
-	clk_unprepare(mdp->clk_mm);
-disable_clk_main:
-	clk_unprepare(mdp->clk_main);
-	return ret;
 }
 
 static int mtk_disp_pwm_remove(struct platform_device *pdev)
 {
 	struct mtk_disp_pwm *mdp = platform_get_drvdata(pdev);
-	int ret;
-
-	ret = pwmchip_remove(&mdp->chip);
-	clk_unprepare(mdp->clk_mm);
-	clk_unprepare(mdp->clk_main);
 
-	return ret;
+	return pwmchip_remove(&mdp->chip);
 }
 
 static const struct mtk_pwm_data mt2701_pwm_data = {
-- 
2.21.0
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  reply	other threads:[~2019-12-16  7:02 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-16  7:01 [PATCH v2 0/2] pwm_mtk_disp suspend resume issue fix Jitao Shi
2019-12-16  7:01 ` Jitao Shi [this message]
2019-12-16  8:18   ` [PATCH v2 1/2] pwm: fine tune pwm-mtk-disp clock control flow Uwe Kleine-König
2019-12-17  2:42     ` Jitao Shi
2019-12-16  7:01 ` [PATCH v2 2/2] pwm/mtk_disp: move the reg enable trigger in config Jitao Shi
2019-12-16  8:20   ` Uwe Kleine-König

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