diff options
| author | Gao Pan <pandy.gao@nxp.com> | 2017-12-04 13:27:00 +0800 |
|---|---|---|
| committer | Leonard Crestez <leonard.crestez@nxp.com> | 2018-08-24 12:41:33 +0300 |
| commit | f481a7dad97533144ebf66ee16b63c4cb3cb96c0 (patch) | |
| tree | e3e3f00161eaaea09da91dd244aaf891f7f4eafe /drivers/input/misc/mpl3115.c | |
| parent | d66a30591bddb78b5f7b0cafc2f8549a34f63ebd (diff) | |
MLK-17061-1 sensor: set sensor interrupt pins as open-drain
The sensors share an interrupt pin on imx8qm/imx8qxp mek.
As a result, the interrupt signals will be interfered by
each other in default push-pull status.
This patch sets sensor interrupt pins as open-drain when
necessary.
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
(cherry-picked from 48bcb7aafa2a3ced923d1a1753bb19d89a9fc273)
Diffstat (limited to 'drivers/input/misc/mpl3115.c')
| -rw-r--r-- | drivers/input/misc/mpl3115.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/input/misc/mpl3115.c b/drivers/input/misc/mpl3115.c index b272cf38a645..4bd5420e4e93 100644 --- a/drivers/input/misc/mpl3115.c +++ b/drivers/input/misc/mpl3115.c @@ -157,6 +157,13 @@ static const struct attribute_group mpl3115_attr_group = { static void mpl3115_device_init(struct i2c_client *client) { u8 val[8]; + struct device_node *np = client->dev.of_node; + + /* set interrupt pin as open-drain */ + if (of_get_property(np, "interrupt-open-drain", NULL)) { + val[0] = 0x11; + mpl3115_i2c_write(client, MPL3115_CTRL_REG3, val, 1); + } val[0] = 0x28; mpl3115_i2c_write(client, MPL3115_CTRL_REG1, val, 1); @@ -204,6 +211,7 @@ static int mpl3115_probe(struct i2c_client *client, struct input_dev *idev; struct i2c_adapter *adapter; struct mpl3115_data *pdata; + adapter = to_i2c_adapter(client->dev.parent); result = i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE | |