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pwm: imx-tpm: Enable pinctrl setting for sleep state

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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>
This commit is contained in:
Shenwei Wang 2024-07-02 11:45:14 -05:00 committed by Uwe Kleine-König
parent f3a616e2a8
commit 9b22ceb31a
1 changed files with 14 additions and 2 deletions
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16
drivers/pwm/pwm-imx-tpm.c
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@ -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;
}