staging: ste_rmi4: remove cross-dependent platform data

The ux500 machine was actually defining platform data for the
staging driver ste_rmi4, which is not OK. Let us instead define
some __weak platform data in the machine so that the staging
driver can override it at compile-time and we can thus have the
driver self-contained in staging.

Reported-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 35 insertions, 22 deletions

diff --git a/arch/arm/mach-ux500/board-mop500-u8500uib.c b/arch/arm/mach-ux500/board-mop500-u8500uib.c
index d8a8734a0eba..8ce46c0fdfd5 100644
--- a/arch/arm/mach-ux500/board-mop500-u8500uib.c
+++ b/arch/arm/mach-ux500/board-mop500-u8500uib.c
@@ -12,34 +12,14 @@
 #include <linux/interrupt.h>
 #include <linux/mfd/tc3589x.h>
 #include <linux/input/matrix_keypad.h>
-#include <../drivers/staging/ste_rmi4/synaptics_i2c_rmi4.h>
 
 #include <mach/gpio.h>
 #include <mach/irqs.h>
 
 #include "board-mop500.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,
-        .regulator_en   = false,
-};
-
-static struct i2c_board_info __initdata mop500_i2c3_devices_u8500[] = {
-        {
-                I2C_BOARD_INFO("synaptics_rmi4_i2c", 0x4B),
-                .platform_data = &rmi4_i2c_dev_platformdata,
-        },
+/* Dummy data that can be overridden by staging driver */
+struct i2c_board_info __initdata __weak mop500_i2c3_devices_u8500[] = {
 };
 
 /*
diff --git a/drivers/staging/ste_rmi4/Makefile b/drivers/staging/ste_rmi4/Makefile
index 6cce2ed187ef..176f46900571 100644
--- a/drivers/staging/ste_rmi4/Makefile
+++ b/drivers/staging/ste_rmi4/Makefile
@@ -2,3 +2,4 @@
 # Makefile for the RMI4 touchscreen driver.
 #
 obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4) += synaptics_i2c_rmi4.o
+obj-$(CONFIG_MACH_U8500) += board-mop500-u8500uib-rmi4.o
diff --git a/drivers/staging/ste_rmi4/board-mop500-u8500uib-rmi4.c b/drivers/staging/ste_rmi4/board-mop500-u8500uib-rmi4.c
new file mode 100644
index 000000000000..a272e488e5b9
--- /dev/null
+++ b/drivers/staging/ste_rmi4/board-mop500-u8500uib-rmi4.c
@@ -0,0 +1,32 @@
+/*
+ * 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/gpio.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,
+        },
+};