[PATCH 5.15 230/779] pwm: sifive: Shut down hardware only after pwmchip_remove() completed

From: Greg Kroah-Hartman
Date: Mon Aug 15 2022 - 14:48:04 EST


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

[ 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@xxxxxxxxxxxxxx>
Tested-by: Emil Renner Berthing <emil.renner.berthing@xxxxxxxxxxxxx>
Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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