pwm: dwc: allow suspend/resume for 16 channels

With 16 channel pwm support, we're registering two instances of pwm_chip
with 8 channels each. We need to update PM functions to use both instances
of pwm_chip during power state transitions.

Introduce struct dwc_pwm_drvdata and use it as driver_data, which will
maintain both instances of pwm_chip along with dwc_pwm_info and allow us
to use them inside suspend/resume handles.

Fixes: ebf2c89eb95e ("pwm: dwc: Add 16 channel support for Intel Elkhart Lake")
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240415074051.14681-1-raag.jadav@intel.com
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/pwm/pwm-dwc.h b/drivers/pwm/pwm-dwc.h
index a8b074841ae8..c6e2df5a6122 100644
--- a/drivers/pwm/pwm-dwc.h
+++ b/drivers/pwm/pwm-dwc.h
@@ -38,6 +38,12 @@ struct dwc_pwm_info {
 	unsigned int size;
 };
 
+struct dwc_pwm_drvdata {
+	const struct dwc_pwm_info *info;
+	void __iomem *io_base;
+	struct pwm_chip *chips[];
+};
+
 struct dwc_pwm_ctx {
 	u32 cnt;
 	u32 cnt2;