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path: root/drivers/input/rmi4/rmi_i2c.c
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Diffstat (limited to 'drivers/input/rmi4/rmi_i2c.c')
-rw-r--r--drivers/input/rmi4/rmi_i2c.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/input/rmi4/rmi_i2c.c b/drivers/input/rmi4/rmi_i2c.c
index a96a326b53bd..6f2e0e4f0296 100644
--- a/drivers/input/rmi4/rmi_i2c.c
+++ b/drivers/input/rmi4/rmi_i2c.c
@@ -11,6 +11,8 @@
#include <linux/rmi.h>
#include <linux/irq.h>
#include <linux/of.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
#include "rmi_driver.h"
#define BUFFER_SIZE_INCREMENT 32
@@ -37,6 +39,9 @@ struct rmi_i2c_xport {
u8 *tx_buf;
size_t tx_buf_size;
+
+ struct regulator_bulk_data supplies[2];
+ u32 startup_delay;
};
#define RMI_PAGE_SELECT_REGISTER 0xff
@@ -246,6 +251,24 @@ static int rmi_i2c_probe(struct i2c_client *client,
return -ENODEV;
}
+ rmi_i2c->supplies[0].supply = "vdd";
+ rmi_i2c->supplies[1].supply = "vio";
+ retval = devm_regulator_bulk_get(&client->dev,
+ ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
+ if (retval < 0)
+ return retval;
+
+ retval = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
+ if (retval < 0)
+ return retval;
+
+ of_property_read_u32(client->dev.of_node, "syna,startup-delay-ms",
+ &rmi_i2c->startup_delay);
+
+ msleep(rmi_i2c->startup_delay);
+
rmi_i2c->client = client;
mutex_init(&rmi_i2c->page_mutex);
@@ -286,6 +309,8 @@ static int rmi_i2c_remove(struct i2c_client *client)
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
rmi_unregister_transport_device(&rmi_i2c->xport);
+ regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
return 0;
}
@@ -308,6 +333,10 @@ static int rmi_i2c_suspend(struct device *dev)
dev_warn(dev, "Failed to enable irq for wake: %d\n",
ret);
}
+
+ regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
+
return ret;
}
@@ -317,6 +346,13 @@ static int rmi_i2c_resume(struct device *dev)
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
int ret;
+ ret = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
+ if (ret)
+ return ret;
+
+ msleep(rmi_i2c->startup_delay);
+
enable_irq(rmi_i2c->irq);
if (device_may_wakeup(&client->dev)) {
ret = disable_irq_wake(rmi_i2c->irq);
@@ -346,6 +382,9 @@ static int rmi_i2c_runtime_suspend(struct device *dev)
disable_irq(rmi_i2c->irq);
+ regulator_bulk_disable(ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
+
return 0;
}
@@ -355,6 +394,13 @@ static int rmi_i2c_runtime_resume(struct device *dev)
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
int ret;
+ ret = regulator_bulk_enable(ARRAY_SIZE(rmi_i2c->supplies),
+ rmi_i2c->supplies);
+ if (ret)
+ return ret;
+
+ msleep(rmi_i2c->startup_delay);
+
enable_irq(rmi_i2c->irq);
ret = rmi_driver_resume(rmi_i2c->xport.rmi_dev);