diff options
| author | Shenwei Wang <shenwei.wang@nxp.com> | 2024-07-02 19:45:14 +0300 |
|---|---|---|
| committer | Uwe Kleine-König <ukleinek@kernel.org> | 2024-07-10 18:53:51 +0300 |
| commit | 9b22ceb31a7dda9a78959db3c6e35b04888032f9 (patch) | |
| tree | 053f667db8626ef9a5de7da780119fd1ab0fa22d /drivers/pwm | |
| parent | f3a616e2a8755bb45f72d93aee3ac1b7e808182d (diff) | |
| download | linux-9b22ceb31a7dda9a78959db3c6e35b04888032f9.tar.xz | |
pwm: imx-tpm: Enable pinctrl setting for sleep state
Apply the pinctrl setting of sleep state when system enters
suspend state.
Restore to the default pinctrl setting when system resumes.
Signed-off-by: Shenwei Wang <shenwei.wang@nxp.com>
Link: https://lore.kernel.org/r/20240702164514.11007-1-shenwei.wang@nxp.com
Signed-off-by: Uwe Kleine-König <ukleinek@kernel.org>
Diffstat (limited to 'drivers/pwm')
| -rw-r--r-- | drivers/pwm/pwm-imx-tpm.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/pwm/pwm-imx-tpm.c b/drivers/pwm/pwm-imx-tpm.c index c50ddbac43c8..96ea343856f0 100644 --- a/drivers/pwm/pwm-imx-tpm.c +++ b/drivers/pwm/pwm-imx-tpm.c @@ -20,6 +20,7 @@ #include <linux/io.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> #include <linux/pwm.h> #include <linux/slab.h> @@ -380,6 +381,7 @@ static int pwm_imx_tpm_probe(struct platform_device *pdev) static int pwm_imx_tpm_suspend(struct device *dev) { struct imx_tpm_pwm_chip *tpm = dev_get_drvdata(dev); + int ret; if (tpm->enable_count > 0) return -EBUSY; @@ -393,7 +395,11 @@ static int pwm_imx_tpm_suspend(struct device *dev) clk_disable_unprepare(tpm->clk); - return 0; + ret = pinctrl_pm_select_sleep_state(dev); + if (ret) + clk_prepare_enable(tpm->clk); + + return ret; } static int pwm_imx_tpm_resume(struct device *dev) @@ -401,9 +407,15 @@ static int pwm_imx_tpm_resume(struct device *dev) struct imx_tpm_pwm_chip *tpm = dev_get_drvdata(dev); int ret = 0; - ret = clk_prepare_enable(tpm->clk); + ret = pinctrl_pm_select_default_state(dev); if (ret) + return ret; + + ret = clk_prepare_enable(tpm->clk); + if (ret) { dev_err(dev, "failed to prepare or enable clock: %d\n", ret); + pinctrl_pm_select_sleep_state(dev); + } return ret; } |