Currently the RMI4 driver expects the device to have a GPIO and manages
the that GPIO internally. However, this duplicates functionality which
could be handled by more generic interrupt handling code. Also, some
RMI devices will not have a GPIO or it won't be accessible to the rmi4
driver. This patch removes the GPIO code and instead gets the irq passed
up from the underlying transport (ie i2c-core).
Signed-off-by: Andrew Duggan <aduggan@xxxxxxxxxxxxx>
---
After additional testing on a platform which uses board files I realized
that the platform data should be able to provide irq flags. This patch
adds to V1 by addind irq_flags in the platform data and copying it to
the transport device. It also or's in the IRQF_ONESHOT flag in instead of
assigning them.
Thanks,
Andrew
drivers/input/rmi4/rmi_bus.h | 3 ++
drivers/input/rmi4/rmi_driver.c | 81 +++++++----------------------------------
drivers/input/rmi4/rmi_driver.h | 2 -
drivers/input/rmi4/rmi_i2c.c | 28 +++-----------
include/linux/rmi.h | 21 ++---------
5 files changed, 24 insertions(+), 111 deletions(-)
diff --git a/drivers/input/rmi4/rmi_bus.h b/drivers/input/rmi4/rmi_bus.h
index d4cfc85..4e3bca3 100644
--- a/drivers/input/rmi4/rmi_bus.h
+++ b/drivers/input/rmi4/rmi_bus.h
@@ -175,6 +175,9 @@ struct rmi_transport_dev {
struct device *dev;
struct rmi_device *rmi_dev;
+ int irq;
+ int irq_flags;
+
irqreturn_t (*irq_thread)(int irq, void *p);
irqreturn_t (*hard_irq)(int irq, void *p);
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index b9db709..03292e5 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -20,7 +20,6 @@
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/fs.h>
-#include <linux/gpio.h>
#include <linux/kconfig.h>
#include <linux/list.h>
#include <linux/module.h>
@@ -42,27 +41,18 @@
#define DEFAULT_POLL_INTERVAL_MS 13
-#define IRQ_DEBUG(data) (IS_ENABLED(CONFIG_RMI4_DEBUG) && data->irq_debug)
-
static irqreturn_t rmi_irq_thread(int irq, void *p)
{
struct rmi_transport_dev *xport = p;
struct rmi_device *rmi_dev = xport->rmi_dev;
struct rmi_driver *driver = rmi_dev->driver;
- struct rmi_device_platform_data *pdata = xport->dev->platform_data;
struct rmi_driver_data *data;
data = dev_get_drvdata(&rmi_dev->dev);
- if (IRQ_DEBUG(data))
- dev_dbg(xport->dev, "ATTN gpio, value: %d.\n",
- gpio_get_value(pdata->attn_gpio));
-
- if (gpio_get_value(pdata->attn_gpio) == pdata->attn_polarity) {
- data->attn_count++;
- if (driver && driver->irq_handler && rmi_dev)
- driver->irq_handler(rmi_dev, irq);
- }
+ data->attn_count++;
+ if (driver && driver->irq_handler && rmi_dev)
+ driver->irq_handler(rmi_dev, irq);
return IRQ_HANDLED;
}
@@ -124,15 +114,15 @@ static void disable_sensor(struct rmi_device *rmi_dev)
if (!data->enabled)
return;
- if (!data->irq)
+ if (!rmi_dev->xport->irq)
disable_polling(rmi_dev);
if (rmi_dev->xport->ops->disable_device)
rmi_dev->xport->ops->disable_device(rmi_dev->xport);
- if (data->irq) {
- disable_irq(data->irq);
- free_irq(data->irq, rmi_dev->xport);
+ if (rmi_dev->xport->irq > 0) {
+ disable_irq(rmi_dev->xport->irq);
+ free_irq(rmi_dev->xport->irq, rmi_dev->xport);
}
data->enabled = false;
@@ -154,12 +144,12 @@ static int enable_sensor(struct rmi_device *rmi_dev)
}
xport = rmi_dev->xport;
- if (data->irq) {
- retval = request_threaded_irq(data->irq,
+ if (xport->irq > 0) {
+ retval = request_threaded_irq(xport->irq,
xport->hard_irq ? xport->hard_irq : NULL,
xport->irq_thread ?
xport->irq_thread : rmi_irq_thread,
- data->irq_flags,
+ xport->irq_flags,
dev_name(&rmi_dev->dev), xport);
if (retval)
return retval;
@@ -717,15 +707,10 @@ static int rmi_driver_remove(struct device *dev)
{
struct rmi_device *rmi_dev = to_rmi_device(dev);
struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev);
- const struct rmi_device_platform_data *pdata =
- rmi_get_platform_data(rmi_dev);
disable_sensor(rmi_dev);
rmi_free_function_list(rmi_dev);
- if (data->gpio_held)
- gpio_free(pdata->attn_gpio);
-
kfree(data->irq_status);
kfree(data);
@@ -866,47 +851,9 @@ static int rmi_driver_probe(struct device *dev)
mutex_init(&data->suspend_mutex);
}
- if (gpio_is_valid(pdata->attn_gpio)) {
- static const char GPIO_LABEL[] = "attn";
- unsigned long gpio_flags = GPIOF_DIR_IN;
-
- data->irq = gpio_to_irq(pdata->attn_gpio);
- if (pdata->level_triggered) {
- data->irq_flags = IRQF_ONESHOT |
- ((pdata->attn_polarity == RMI_ATTN_ACTIVE_HIGH)
- ? IRQF_TRIGGER_HIGH : IRQF_TRIGGER_LOW);
- } else {
- data->irq_flags =
- (pdata->attn_polarity == RMI_ATTN_ACTIVE_HIGH)
- ? IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
- }
-
- if (IS_ENABLED(CONFIG_RMI4_DEV))
- gpio_flags |= GPIOF_EXPORT;
-
- retval = gpio_request_one(pdata->attn_gpio, gpio_flags,
- GPIO_LABEL);
- if (retval) {
- dev_warn(dev, "WARNING: Failed to request ATTN gpio %d, code=%d.\n",
- pdata->attn_gpio, retval);
- retval = 0;
- } else {
- dev_info(dev, "Obtained ATTN gpio %d.\n",
- pdata->attn_gpio);
- data->gpio_held = true;
- if (IS_ENABLED(CONFIG_RMI4_DEV)) {
- retval = gpio_export_link(dev,
- GPIO_LABEL, pdata->attn_gpio);
- if (retval) {
- dev_warn(dev,
- "WARNING: Failed to symlink ATTN gpio!\n");
- retval = 0;
- } else {
- dev_info(dev, "Exported ATTN gpio %d.",
- pdata->attn_gpio);
- }
- }
- }
+ if (rmi_dev->xport->irq > 0) {
+ if (!rmi_dev->xport->hard_irq)
+ rmi_dev->xport->irq_flags |= IRQF_ONESHOT;
} else {
data->poll_interval = ktime_set(0,
(pdata->poll_interval_ms ? pdata->poll_interval_ms :
@@ -924,8 +871,6 @@ err_destroy_functions:
rmi_free_function_list(rmi_dev);
kfree(irq_memory);
err_free_mem:
- if (data->gpio_held)
- gpio_free(pdata->attn_gpio);
kfree(data);
return retval < 0 ? retval : 0;
}
diff --git a/drivers/input/rmi4/rmi_driver.h b/drivers/input/rmi4/rmi_driver.h
index 34f7a7d..ad69962 100644
--- a/drivers/input/rmi4/rmi_driver.h
+++ b/drivers/input/rmi4/rmi_driver.h
@@ -38,8 +38,6 @@ struct rmi_driver_data {
bool f01_bootloader_mode;
u32 attn_count;
- u32 irq_debug; /* Should be bool, but debugfs wants u32 */
- bool gpio_held;
int irq;
int irq_flags;
int num_of_irq_regs;
diff --git a/drivers/input/rmi4/rmi_i2c.c b/drivers/input/rmi4/rmi_i2c.c
index 24d8a04..277cdc8 100644
--- a/drivers/input/rmi4/rmi_i2c.c
+++ b/drivers/input/rmi4/rmi_i2c.c
@@ -196,9 +196,9 @@ static int rmi_i2c_probe(struct i2c_client *client,
return -EINVAL;
}
- dev_dbg(&client->dev, "Probing %s at %#02x (GPIO %d).\n",
+ dev_dbg(&client->dev, "Probing %s at %#02x.\n",
pdata->sensor_name ? pdata->sensor_name : "-no name-",
- client->addr, pdata->attn_gpio);
+ client->addr);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev,
@@ -206,15 +206,6 @@ static int rmi_i2c_probe(struct i2c_client *client,
return -ENODEV;
}
- if (pdata->gpio_config) {
- retval = pdata->gpio_config(pdata->gpio_data, true);
- if (retval < 0) {
- dev_err(&client->dev, "Failed to configure GPIOs, code: %d.\n",
- retval);
- return retval;
- }
- }
-
rmi_i2c = devm_kzalloc(&client->dev, sizeof(struct rmi_i2c_xport),
GFP_KERNEL);
if (!rmi_i2c)
@@ -226,6 +217,8 @@ static int rmi_i2c_probe(struct i2c_client *client,
rmi_i2c->xport.dev = &client->dev;
rmi_i2c->xport.proto_name = "i2c";
rmi_i2c->xport.ops = &rmi_i2c_ops;
+ rmi_i2c->xport.irq = client->irq;
+ rmi_i2c->xport.irq_flags = pdata->irq_flags;
/*
* Setting the page to zero will (a) make sure the PSR is in a
@@ -241,7 +234,7 @@ static int rmi_i2c_probe(struct i2c_client *client,
if (retval) {
dev_err(&client->dev, "Failed to register transport driver at 0x%.2X.\n",
client->addr);
- goto err_gpio;
+ return retval;
}
i2c_set_clientdata(client, rmi_i2c);
@@ -249,25 +242,14 @@ static int rmi_i2c_probe(struct i2c_client *client,
dev_info(&client->dev, "registered rmi i2c driver at %#04x.\n",
client->addr);
return 0;
-
-err_gpio:
- if (pdata->gpio_config)
- pdata->gpio_config(pdata->gpio_data, false);
-
- return retval;
}
static int rmi_i2c_remove(struct i2c_client *client)
{
- const struct rmi_device_platform_data *pdata =
- dev_get_platdata(&client->dev);
struct rmi_i2c_xport *rmi_i2c = i2c_get_clientdata(client);
rmi_unregister_transport_device(&rmi_i2c->xport);
- if (pdata->gpio_config)
- pdata->gpio_config(pdata->gpio_data, false);
-
return 0;
}
diff --git a/include/linux/rmi.h b/include/linux/rmi.h
index ca35b2f..cb09cdf 100644
--- a/include/linux/rmi.h
+++ b/include/linux/rmi.h
@@ -203,22 +203,11 @@ struct rmi_device_platform_data_spi {
*
* @sensor_name - this is used for various diagnostic messages.
*
+ * @irq_flags - this is used to specify intrerrupt type flags.
+ *
* @firmware_name - if specified will override default firmware name,
* for reflashing.
*
- * @attn_gpio - the index of a GPIO that will be used to provide the ATTN
- * interrupt from the touch sensor.
- * @attn_polarity - indicates whether ATTN is active high or low.
- * @level_triggered - by default, the driver uses edge triggered interrupts.
- * However, this can cause problems with suspend/resume on some platforms. In
- * that case, set this to 1 to use level triggered interrupts.
- * @gpio_config - a routine that will be called when the driver is loaded to
- * perform any platform specific GPIO configuration, and when it is unloaded
- * for GPIO de-configuration. This is typically used to configure the ATTN
- * GPIO and the I2C or SPI pins, if necessary.
- * @gpio_data - platform specific data to be passed to the GPIO configuration
- * function.
- *
* @poll_interval_ms - the time in milliseconds between reads of the interrupt
* status register. This is ignored if attn_gpio is non-zero.
*
@@ -256,11 +245,7 @@ struct rmi_device_platform_data_spi {
struct rmi_device_platform_data {
char *sensor_name; /* Used for diagnostics. */
- int attn_gpio;
- enum rmi_attn_polarity attn_polarity;
- bool level_triggered;
- void *gpio_data;
- int (*gpio_config)(void *gpio_data, bool configure);
+ int irq_flags;
int poll_interval_ms;
--
2.1.4
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