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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: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Sebastian Reichel 2017-08-21 16:54:02 +02:00 committed by Lee Jones
parent 7fe9899ef4
commit ebf555111b
1 changed files with 23 additions and 3 deletions
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26
drivers/mfd/da9052-core.c
View File

@ -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;