linux-kernel - [PATCH 5.18 0300/1095] pwm: sifive: Shut down hardware only after pwmchip

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Message-Id: <20220815180442.192147527@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:54:59 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.18 0300/1095] pwm: sifive: Shut down hardware only after pwmchip_remove() completed

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

[ Upstream commit 2375e964d541bb09158cd2dff67b5d74e8de61cd ]

The PWMs are expected to be functional until pwmchip_remove() is called.
So disable the clks only afterwards.

Fixes: 9e37a53eb051 ("pwm: sifive: Add a driver for SiFive SoC PWM")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Tested-by: Emil Renner Berthing <emil.renner.berthing@...onical.com>
Signed-off-by: Thierry Reding <thierry.reding@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/pwm/pwm-sifive.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/pwm/pwm-sifive.c b/drivers/pwm/pwm-sifive.c
index 3936fda53366..58347fcd4812 100644
--- a/drivers/pwm/pwm-sifive.c
+++ b/drivers/pwm/pwm-sifive.c
@@ -321,6 +321,9 @@ static int pwm_sifive_remove(struct platform_device *dev)
 	struct pwm_device *pwm;
 	int ch;
 
+	pwmchip_remove(&ddata->chip);
+	clk_notifier_unregister(ddata->clk, &ddata->notifier);
+
 	for (ch = 0; ch < ddata->chip.npwm; ch++) {
 		pwm = &ddata->chip.pwms[ch];
 		if (pwm->state.enabled)
@@ -328,8 +331,6 @@ static int pwm_sifive_remove(struct platform_device *dev)
 	}
 
 	clk_unprepare(ddata->clk);
-	pwmchip_remove(&ddata->chip);
-	clk_notifier_unregister(ddata->clk, &ddata->notifier);
 
 	return 0;
 }
-- 
2.35.1