Unverified Commit f6d8a80f authored by Stefan Eichenberger's avatar Stefan Eichenberger Committed by Robert Foss
Browse files

drm/bridge: lt8912b: Add power supplies 



Add supplies to the driver that can be used to turn the Lontium lt8912b
on and off. It can have up to 7 independent supplies, we add them all
and enable/disable them with bulk_enable/disable.

Signed-off-by: default avatarStefan Eichenberger <stefan.eichenberger@toradex.com>
Signed-off-by: default avatarFrancesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: default avatarRobert Foss <rfoss@kernel.org>
Signed-off-by: default avatarRobert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231115121338.22959-4-francesco@dolcini.it
parent f168c7f7

drivers/gpu/drm/bridge/lontium-lt8912b.c

+30 −0
Original line number Diff line number Diff line
@@ -43,6 +43,8 @@ struct lt8912 { 


	struct videomode mode;



	struct regulator_bulk_data supplies[7];



	u8 data_lanes;

	bool is_power_on;

};
@@ -257,6 +259,12 @@ static int lt8912_free_i2c(struct lt8912 *lt) 


static int lt8912_hard_power_on(struct lt8912 *lt)

{

	int ret;



	ret = regulator_bulk_enable(ARRAY_SIZE(lt->supplies), lt->supplies);

	if (ret)

		return ret;



	gpiod_set_value_cansleep(lt->gp_reset, 0);

	msleep(20);
@@ -267,6 +275,9 @@ static void lt8912_hard_power_off(struct lt8912 *lt) 
{

	gpiod_set_value_cansleep(lt->gp_reset, 1);

	msleep(20);



	regulator_bulk_disable(ARRAY_SIZE(lt->supplies), lt->supplies);



	lt->is_power_on = false;

}
@@ -661,6 +672,21 @@ static int lt8912_bridge_suspend(struct device *dev) 


static DEFINE_SIMPLE_DEV_PM_OPS(lt8912_bridge_pm_ops, lt8912_bridge_suspend, lt8912_bridge_resume);



static int lt8912_get_regulators(struct lt8912 *lt)

{

	unsigned int i;

	const char * const supply_names[] = {

		"vdd", "vccmipirx", "vccsysclk", "vcclvdstx",

		"vcchdmitx", "vcclvdspll", "vcchdmipll"

	};



	for (i = 0; i < ARRAY_SIZE(lt->supplies); i++)

		lt->supplies[i].supply = supply_names[i];



	return devm_regulator_bulk_get(lt->dev, ARRAY_SIZE(lt->supplies),

				       lt->supplies);

}



static int lt8912_parse_dt(struct lt8912 *lt)

{

	struct gpio_desc *gp_reset;
@@ -712,6 +738,10 @@ static int lt8912_parse_dt(struct lt8912 *lt) 
		goto err_free_host_node;

	}



	ret = lt8912_get_regulators(lt);

	if (ret)

		goto err_free_host_node;



	of_node_put(port_node);

	return 0;