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authorSebastian Reichel <sebastian.reichel@collabora.co.uk>2017-08-21 16:54:02 +0200
committerLee Jones <lee.jones@linaro.org>2017-08-22 08:44:55 +0100
commitebf555111bc11a5da9144e4af524260731a8b968 (patch)
tree8fa27eb5eff22f735789cd3638a8d62277b5b5fe
parent7fe9899ef4e4e6d152a3a54e262cda38e1e1a1d3 (diff)
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>
-rw-r--r--drivers/mfd/da9052-core.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
index a88c2065d8ab..a23a3a1c7061 100644
--- a/drivers/mfd/da9052-core.c
+++ b/drivers/mfd/da9052-core.c
@@ -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>
@@ -519,9 +520,6 @@ 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;