This is a note to let you know that I've just added the patch titled
pwm: spear: Don't modify HW state in .remove callback
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pwm-spear-don-t-modify-hw-state-in-.remove-callback.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b799b3bc6f3b544af48294b0e76e0f8439c9dc30
Author: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Date: Wed Apr 28 11:05:24 2021 +0200
pwm: spear: Don't modify HW state in .remove callback
[ Upstream commit b601a18f12383001e7a8da238de7ca1559ebc450 ]
A consumer is expected to disable a PWM before calling pwm_put(). And if
they didn't there is hopefully a good reason (or the consumer needs
fixing). Also if disabling an enabled PWM was the right thing to do,
this should better be done in the framework instead of in each low level
driver.
So drop the hardware modification from the .remove() callback.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
Signed-off-by: Thierry Reding <thierry.reding@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/pwm/pwm-spear.c b/drivers/pwm/pwm-spear.c
index 1a1cedfd11ce..6879b49581b3 100644
--- a/drivers/pwm/pwm-spear.c
+++ b/drivers/pwm/pwm-spear.c
@@ -228,10 +228,6 @@ static int spear_pwm_probe(struct platform_device *pdev)
static int spear_pwm_remove(struct platform_device *pdev)
{
struct spear_pwm_chip *pc = platform_get_drvdata(pdev);
- int i;
-
- for (i = 0; i < NUM_PWM; i++)
- pwm_disable(&pc->chip.pwms[i]);
/* clk was prepared in probe, hence unprepare it here */
clk_unprepare(pc->clk);
