staging: ste_rmi4: kill platform_data hack

There is only one instance of the platform data for synaptics_i2c_rmi4
in the mainline kernel, so there is no point of pretending its
variable here. The only member that has a dependency on the platform
is actually the interrupt number, and there is a field in the
i2c_client structure that gets initialized from the board info,
so we can trivially move the board_into into the platform without
knowledge of the platform_data structure.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-ux500/board-mop500-u8500uib.c

@@ -16,8 +16,11 @@
 
 #include "board-mop500.h"
 
-/* Dummy data that can be overridden by staging driver */
+static struct i2c_board_info __initdata mop500_i2c3_devices_u8500[] = {
-struct i2c_board_info __initdata __weak mop500_i2c3_devices_u8500[] = {
+	{
+		I2C_BOARD_INFO("synaptics_rmi4_i2c", 0x4B),
+		.irq = NOMADIK_GPIO_TO_IRQ(84),
+	},
 };
 
 /*

drivers/staging/ste_rmi4/Makefile

@@ -2,4 +2,3 @@
 # Makefile for the RMI4 touchscreen driver.
 #
 obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += synaptics_i2c_rmi4.o
-obj-$(CONFIG_MACH_MOP500) += board-mop500-u8500uib-rmi4.o

drivers/staging/ste_rmi4/board-mop500-u8500uib-rmi4.c

@@ -1,31 +0,0 @@
-/*
- * Some platform data for the RMI4 touchscreen that will override the __weak
- * platform data in the Ux500 machine if this driver is activated.
- */
-#include <linux/i2c.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
-#include <mach/irqs.h>
-#include "synaptics_i2c_rmi4.h"
-
-/*
- * Synaptics RMI4 touchscreen interface on the U8500 UIB
- */
-
-/*
- * Descriptor structure.
- * Describes the number of i2c devices on the bus that speak RMI.
- */
-static struct synaptics_rmi4_platform_data rmi4_i2c_dev_platformdata = {
-	.irq_number     = NOMADIK_GPIO_TO_IRQ(84),
-	.irq_type       = (IRQF_TRIGGER_FALLING | IRQF_SHARED),
-	.x_flip		= false,
-	.y_flip		= true,
-};
-
-struct i2c_board_info __initdata mop500_i2c3_devices_u8500[] = {
-	{
-		I2C_BOARD_INFO("synaptics_rmi4_i2c", 0x4B),
-		.platform_data = &rmi4_i2c_dev_platformdata,
-	},
-};

drivers/staging/ste_rmi4/synaptics_i2c_rmi4.c

@@ -864,6 +864,16 @@ static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata)
 	return 0;
 }
 
+/*
+ * Descriptor structure.
+ * Describes the number of i2c devices on the bus that speak RMI.
+ */
+static struct synaptics_rmi4_platform_data synaptics_rmi4_platformdata = {
+	.irq_type       = (IRQF_TRIGGER_FALLING | IRQF_SHARED),
+	.x_flip		= false,
+	.y_flip		= true,
+};
+
 /**
  * synaptics_rmi4_probe() - Initialze the i2c-client touchscreen driver
  * @i2c: i2c client structure pointer
@@ -890,10 +900,8 @@ static int synaptics_rmi4_probe
 		return -EIO;
 	}
 
-	if (!platformdata) {
+	if (!platformdata)
-		dev_err(&client->dev, "%s: no platform data\n", __func__);
+		platformdata = &synaptics_rmi4_platformdata;
-		return -EINVAL;
-	}
 
 	/* Allocate and initialize the instance data for this client */
 	rmi4_data = kcalloc(2, sizeof(struct synaptics_rmi4_data),
@@ -977,13 +985,13 @@ static int synaptics_rmi4_probe
 	synaptics_rmi4_i2c_block_read(rmi4_data,
 			rmi4_data->fn01_data_base_addr + 1, intr_status,
 				rmi4_data->number_of_interrupt_register);
-	retval = request_threaded_irq(platformdata->irq_number, NULL,
+	retval = request_threaded_irq(client->irq, NULL,
 					synaptics_rmi4_irq,
 					platformdata->irq_type,
 					DRIVER_NAME, rmi4_data);
 	if (retval) {
 		dev_err(&client->dev, "%s:Unable to get attn irq %d\n",
-				__func__, platformdata->irq_number);
+				__func__, client->irq);
 		goto err_query_dev;
 	}
 
@@ -996,7 +1004,7 @@ static int synaptics_rmi4_probe
 	return retval;
 
 err_free_irq:
-	free_irq(platformdata->irq_number, rmi4_data);
+	free_irq(client->irq, rmi4_data);
 err_query_dev:
 	regulator_disable(rmi4_data->regulator);
 err_regulator_enable:
@@ -1019,11 +1027,10 @@ err_input:
 static int synaptics_rmi4_remove(struct i2c_client *client)
 {
 	struct synaptics_rmi4_data *rmi4_data = i2c_get_clientdata(client);
-	const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board;
 
 	rmi4_data->touch_stopped = true;
 	wake_up(&rmi4_data->wait);
-	free_irq(pdata->irq_number, rmi4_data);
+	free_irq(client->irq, rmi4_data);
 	input_unregister_device(rmi4_data->input_dev);
 	regulator_disable(rmi4_data->regulator);
 	regulator_put(rmi4_data->regulator);
@@ -1046,10 +1053,9 @@ static int synaptics_rmi4_suspend(struct device *dev)
 	int retval;
 	unsigned char intr_status;
 	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
-	const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board;
 
 	rmi4_data->touch_stopped = true;
-	disable_irq(pdata->irq_number);
+	disable_irq(rmi4_data->i2c_client->irq);
 
 	retval = synaptics_rmi4_i2c_block_read(rmi4_data,
 				rmi4_data->fn01_data_base_addr + 1,
@@ -1080,11 +1086,10 @@ static int synaptics_rmi4_resume(struct device *dev)
 	int retval;
 	unsigned char intr_status;
 	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
-	const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board;
 
 	regulator_enable(rmi4_data->regulator);
 
-	enable_irq(pdata->irq_number);
+	enable_irq(rmi4_data->i2c_client->irq);
 	rmi4_data->touch_stopped = false;
 
 	retval = synaptics_rmi4_i2c_block_read(rmi4_data,

drivers/staging/ste_rmi4/synaptics_i2c_rmi4.h

@@ -38,7 +38,6 @@
  * This structure gives platform data for rmi4.
  */
 struct synaptics_rmi4_platform_data {
-	int irq_number;
 	int irq_type;
 	bool x_flip;
 	bool y_flip;