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Commit 416a07fb authored by Dave Gerlach's avatar Dave Gerlach Committed by Jyri Sarha
Browse files

drm/tilcdc: adopt pinctrl support 



Update tilcdc driver to set the state of the pins to:
- "default on resume
- "sleep" on suspend

By optionally putting the pins into sleep state in the suspend callback
we can accomplish two things.
- minimize current leakage from pins and thus save power,
- prevent the IP from driving pins output in an uncontrolled manner,
which may happen if the power domain drops the domain regulator.

Signed-off-by: default avatarDave Gerlach <d-gerlach@ti.com>
Signed-off-by: default avatarDarren Etheridge <detheridge@ti.com>
Signed-off-by: default avatarJyri Sarha <jsarha@ti.com>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent 6f206e9d

drivers/gpu/drm/tilcdc/tilcdc_drv.c

+8 −0
Original line number Diff line number Diff line
@@ -18,6 +18,8 @@ 
/* LCDC DRM driver, based on da8xx-fb */



#include <linux/component.h>

#include <linux/pinctrl/consumer.h>

#include <linux/suspend.h>



#include "tilcdc_drv.h"

#include "tilcdc_regs.h"
@@ -585,6 +587,9 @@ static int tilcdc_pm_suspend(struct device *dev) 
		if (registers[i].save && (priv->rev >= registers[i].rev))

			priv->saved_register[n++] = tilcdc_read(ddev, registers[i].reg);



	/* Select sleep pin state */

	pinctrl_pm_select_sleep_state(dev);



	return 0;

}
@@ -594,6 +599,9 @@ static int tilcdc_pm_resume(struct device *dev) 
	struct tilcdc_drm_private *priv = ddev->dev_private;

	unsigned i, n = 0;



	/* Select default pin state */

	pinctrl_pm_select_default_state(dev);



	/* Restore register state: */

	for (i = 0; i < ARRAY_SIZE(registers); i++)

		if (registers[i].save && (priv->rev >= registers[i].rev))