[media] marvell-cam: Pass sensor parameters from the platform

Depending on the controller, the ov7670 sensor may be told to work with a
different clock speed or to use the SMBUS protocol. Remove the wired-in
code and pass that information from the platform layer. The Cafe driver
now just assumes it's running on an OLPC XO 1; I do not believe it has ever
run anywhere else.

Cc: Daniel Drake <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/video/marvell-ccic/cafe-driver.c

···
 	mcam->plat_power_down = cafe_ctlr_power_down;
 	mcam->dev = &pdev->dev;
 	/*
+	 * Set the clock speed for the XO 1; I don't believe this
+	 * driver has ever run anywhere else.
+	 */
+	mcam->clock_speed = 45;
+	mcam->use_smbus = 1;
+	/*
 	 * Get set up on the PCI bus.
 	 */
 	ret = pci_enable_device(pdev);

drivers/media/video/marvell-ccic/mcam-core.c

···
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/fs.h>
-#include <linux/dmi.h>
 #include <linux/mm.h>
 #include <linux/i2c.h>
 #include <linux/interrupt.h>
···
  * Registration and such.
  */
 
-/* FIXME this is really platform stuff */
-static const struct dmi_system_id olpc_xo1_dmi[] = {
-	{
-		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "OLPC"),
-			DMI_MATCH(DMI_PRODUCT_NAME, "XO"),
-			DMI_MATCH(DMI_PRODUCT_VERSION, "1"),
-		},
-	},
-	{ }
-};
-
 static struct ov7670_config sensor_cfg = {
-	/* This controller only does SMBUS */
-	.use_smbus = true,
-
 	/*
 	 * Exclude QCIF mode, because it only captures a tiny portion
 	 * of the sensor FOV
···
 
 	mcam_ctlr_init(cam);
 
-	/* Apply XO-1 clock speed */
-	if (dmi_check_system(olpc_xo1_dmi))
-		sensor_cfg.clock_speed = 45;
-
 	/*
 	 * Try to find the sensor.
 	 */
+	sensor_cfg.clock_speed = cam->clock_speed;
+	sensor_cfg.use_smbus = cam->use_smbus;
 	cam->sensor_addr = ov7670_info.addr;
 	cam->sensor = v4l2_i2c_new_subdev_board(&cam->v4l2_dev,
 			&cam->i2c_adapter, &ov7670_info, NULL);

drivers/media/video/marvell-ccic/mcam-core.h

···
 	spinlock_t dev_lock;
 	struct device *dev; /* For messages, dma alloc */
 	unsigned int chip_id;
+	short int clock_speed;	/* Sensor clock speed, default 30 */
+	short int use_smbus;	/* SMBUS or straight I2c? */
 
 	/*
 	 * Callbacks from the core to the platform code.