xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pwm: tegra: Don't modify HW state in .remove callback

Browse Source 
[ Upstream commit 86f7fa71cd830d18d7ebcaf719dffd5ddfe1acdd ]

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@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Uwe Kleine-König
2021-06-17 11:51:41 +02:00
committed by Greg Kroah-Hartman
parent 3d82361abd
commit 9dcc9ad343
1 changed files with 0 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/pwm/pwm-tegra.c
View File

@@ -303,7 +303,6 @@ static int tegra_pwm_probe(struct platform_device *pdev)
static int tegra_pwm_remove(struct platform_device *pdev)
{
struct tegra_pwm_chip *pc = platform_get_drvdata(pdev);
unsigned int i;
int err;
if (WARN_ON(!pc))
@@ -313,18 +312,6 @@ static int tegra_pwm_remove(struct platform_device *pdev)
if (err < 0)
return err;
for (i = 0; i < pc->chip.npwm; i++) {
struct pwm_device *pwm = &pc->chip.pwms[i];
if (!pwm_is_enabled(pwm))
if (clk_prepare_enable(pc->clk) < 0)
continue;
pwm_writel(pc, i, 0);
clk_disable_unprepare(pc->clk);
}
reset_control_assert(pc->rst);
clk_disable_unprepare(pc->clk);