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Commit ebf55511 authored by Sebastian Reichel's avatar Sebastian Reichel Committed by Lee Jones
Browse files

mfd: da9052: Make touchscreen registration optional 



If the touchscreen pins are used as general purpose analogue
input, the touchscreen driver should not be used. The pins
will be handled by the existing hwmon driver instead.

Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 7fe9899e

drivers/mfd/da9052-core.c

+23 −3
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/mfd/core.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/property.h>



#include <linux/mfd/da9052/da9052.h>

#include <linux/mfd/da9052/pdata.h>
@@ -518,9 +519,6 @@ static const struct mfd_cell da9052_subdev_info[] = { 
	{

		.name = "da9052-wled3",

	},

	{

		.name = "da9052-tsi",

	},

	{

		.name = "da9052-bat",

	},
@@ -529,6 +527,10 @@ static const struct mfd_cell da9052_subdev_info[] = { 
	},

};



static const struct mfd_cell da9052_tsi_subdev_info[] = {

	{ .name = "da9052-tsi" },

};



const struct regmap_config da9052_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,
@@ -619,9 +621,27 @@ int da9052_device_init(struct da9052 *da9052, u8 chip_id) 
		goto err;

	}



	/*

	 * Check if touchscreen pins are used are analogue input instead

	 * of having a touchscreen connected to them. The analogue input

	 * functionality will be provided by hwmon driver (if enabled).

	 */

	if (!device_property_read_bool(da9052->dev, "dlg,tsi-as-adc")) {

		ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,

				      da9052_tsi_subdev_info,

				      ARRAY_SIZE(da9052_tsi_subdev_info),

				      NULL, 0, NULL);

		if (ret) {

			dev_err(da9052->dev, "failed to add TSI subdev: %d\n",

				ret);

			goto err;

		}

	}



	return 0;



err:

	mfd_remove_devices(da9052->dev);

	da9052_irq_exit(da9052);



	return ret;