diff --git a/drivers/media/i2c/smia/Kconfig b/drivers/media/i2c/smia/Kconfig
index d9be497..13ca043 100644
--- a/drivers/media/i2c/smia/Kconfig
+++ b/drivers/media/i2c/smia/Kconfig
@@ -7,3 +7,11 @@ config VIDEO_SMIAREGS
 
 	  Also a few helper functions are provided to work with binary
 	  register lists.
+
+config VIDEO_ET8EK8
+	tristate "ET8EK8 camera sensor support"
+	depends on I2C && VIDEO_V4L2 && VIDEO_V4L2_SUBDEV_API
+	select VIDEO_SMIAREGS
+	---help---
+	  This is a driver for the Toshiba ET8EK8 5 MP camera sensor.
+	  It is used for example in Nokia N900 (RX-51).
diff --git a/drivers/media/i2c/smia/Makefile b/drivers/media/i2c/smia/Makefile
index cff67bc..56cf15e 100644
--- a/drivers/media/i2c/smia/Makefile
+++ b/drivers/media/i2c/smia/Makefile
@@ -1 +1,2 @@
 obj-$(CONFIG_VIDEO_SMIAREGS)  += smiaregs.o
+obj-$(CONFIG_VIDEO_ET8EK8)    += et8ek8.o
diff --git a/drivers/media/i2c/smia/et8ek8.c b/drivers/media/i2c/smia/et8ek8.c
new file mode 100644
index 0000000..46c112d
--- /dev/null
+++ b/drivers/media/i2c/smia/et8ek8.c
@@ -0,0 +1,1788 @@
+/*
+ * drivers/media/video/et8ek8.c
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ *
+ * Contact: Sakari Ailus <sakari.ailus@nokia.com>
+ *          Tuukka Toivonen <tuukka.o.toivonen@nokia.com>
+ *
+ * Based on code from Toni Leinonen <toni.leinonen@offcode.fi>.
+ *
+ * This driver is based on the Micron MT9T012 camera imager driver
+ * (C) Texas Instruments.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#define DEBUG
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/version.h>
+#include <linux/v4l2-mediabus.h>
+
+#include <media/media-entity.h>
+#include <media/smiaregs.h>
+#include <media/v4l2-ctrls.h>
+#include <media/v4l2-device.h>
+#include <media/v4l2-subdev.h>
+
+#define ET8EK8_NAME		"et8ek8"
+#define ET8EK8_XCLK_HZ		9600000
+#define ET8EK8_PRIV_MEM_SIZE	128
+
+#define CTRL_GAIN		0
+#define CTRL_EXPOSURE		1
+#define CTRL_TEST_PATTERN	2
+
+#define CID_TO_CTRL(id)		((id)==V4L2_CID_GAIN ? CTRL_GAIN : \
+				 (id)==V4L2_CID_EXPOSURE ? CTRL_EXPOSURE : \
+				 (id)==V4L2_CID_TEST_PATTERN ? CTRL_TEST_PATTERN : \
+				 -EINVAL)
+
+struct et8ek8_sensor {
+	struct v4l2_subdev subdev;
+	struct media_pad pad;
+	struct v4l2_mbus_framefmt format;
+	struct gpio_desc *reset;
+	struct regulator *vana;
+	struct clk *ext_clk;
+
+	u16 version;
+
+	struct v4l2_ctrl_handler ctrl_handler;
+	struct v4l2_ctrl *exposure;
+	struct v4l2_ctrl *pixel_rate;
+	struct smia_reglist *current_reglist;
+
+	u8 priv_mem[ET8EK8_PRIV_MEM_SIZE];
+
+	struct mutex power_lock;
+	int power_count;
+};
+
+#define to_et8ek8_sensor(sd)	container_of(sd, struct et8ek8_sensor, subdev)
+
+enum et8ek8_versions {
+	ET8EK8_REV_1 = 0x0001,
+	ET8EK8_REV_2,
+};
+
+/*
+ * This table describes what should be written to the sensor register
+ * for each gain value. The gain(index in the table) is in terms of
+ * 0.1EV, i.e. 10 indexes in the table give 2 time more gain [0] in
+ * the *analog gain, [1] in the digital gain
+ *
+ * Analog gain [dB] = 20*log10(regvalue/32); 0x20..0x100
+ */
+static struct et8ek8_gain {
+	u16 analog;
+	u16 digital;
+} const et8ek8_gain_table[] = {
+	{ 32,    0},  /* x1 */
+	{ 34,    0},
+	{ 37,    0},
+	{ 39,    0},
+	{ 42,    0},
+	{ 45,    0},
+	{ 49,    0},
+	{ 52,    0},
+	{ 56,    0},
+	{ 60,    0},
+	{ 64,    0},  /* x2 */
+	{ 69,    0},
+	{ 74,    0},
+	{ 79,    0},
+	{ 84,    0},
+	{ 91,    0},
+	{ 97,    0},
+	{104,    0},
+	{111,    0},
+	{119,    0},
+	{128,    0},  /* x4 */
+	{137,    0},
+	{147,    0},
+	{158,    0},
+	{169,    0},
+	{181,    0},
+	{194,    0},
+	{208,    0},
+	{223,    0},
+	{239,    0},
+	{256,    0},  /* x8 */
+	{256,   73},
+	{256,  152},
+	{256,  236},
+	{256,  327},
+	{256,  424},
+	{256,  528},
+	{256,  639},
+	{256,  758},
+	{256,  886},
+	{256, 1023},  /* x16 */
+};
+
+/* Register definitions */
+#define REG_REVISION_NUMBER_L	0x1200
+#define REG_REVISION_NUMBER_H	0x1201
+
+#define PRIV_MEM_START_REG	0x0008
+#define PRIV_MEM_WIN_SIZE	8
+
+#define ET8EK8_I2C_DELAY	3	/* msec delay b/w accesses */
+
+#define USE_CRC			1
+
+/*
+ *
+ * Stingray sensor mode settings for Scooby
+ *
+ *
+ */
+
+/* Mode1_poweron_Mode2_16VGA_2592x1968_12.07fps */
+static struct smia_reglist mode1_poweron_mode2_16vga_2592x1968_12_07fps = {	/* 1 */
+/* (without the +1)
+ * SPCK       = 80 MHz
+ * CCP2       = 640 MHz
+ * VCO        = 640 MHz
+ * VCOUNT     = 84 (2016)
+ * HCOUNT     = 137 (3288)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 200
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 7
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 0
+ */
+	.type = SMIA_REGLIST_POWERON,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3288,
+		.height = 2016,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 2592,
+		.window_height = 1968,
+		.pixel_clock = 80000000,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 1207
+		},
+		.max_exp = 2012,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x126C, 0xCC },	/* Need to set firstly */
+		{ SMIA_REG_8BIT, 0x1269, 0x00 },	/* Strobe and Data of CCP2 delay are minimized. */
+		{ SMIA_REG_8BIT, 0x1220, 0x89 },	/* Refined value of Min H_COUNT  */
+		{ SMIA_REG_8BIT, 0x123A, 0x07 },	/* Frequency of SPCK setting (SPCK=MRCK) */
+		{ SMIA_REG_8BIT, 0x1241, 0x94 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1242, 0x02 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x124B, 0x00 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1255, 0xFF },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1256, 0x9F },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1258, 0x00 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x125D, 0x88 },	/* From parallel out to serial out */
+		{ SMIA_REG_8BIT, 0x125E, 0xC0 },	/* From w/ embeded data to w/o embeded data */
+		{ SMIA_REG_8BIT, 0x1263, 0x98 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1268, 0xC6 },	/* CCP2 out is from STOP to ACTIVE */
+		{ SMIA_REG_8BIT, 0x1434, 0x00 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1163, 0x44 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1166, 0x29 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1140, 0x02 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1011, 0x24 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1151, 0x80 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1152, 0x23 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1014, 0x05 },	/* Initial setting( for improvement2 of lower frequency noise ) */
+		{ SMIA_REG_8BIT, 0x1033, 0x06 },
+		{ SMIA_REG_8BIT, 0x1034, 0x79 },
+		{ SMIA_REG_8BIT, 0x1423, 0x3F },
+		{ SMIA_REG_8BIT, 0x1424, 0x3F },
+		{ SMIA_REG_8BIT, 0x1426, 0x00 },
+		{ SMIA_REG_8BIT, 0x1439, 0x00 },	/* Switch of Preset-White-balance (0d:disable / 1d:enable) */
+		{ SMIA_REG_8BIT, 0x161F, 0x60 },	/* Switch of blemish correction (0d:disable / 1d:enable) */
+		{ SMIA_REG_8BIT, 0x1634, 0x00 },	/* Switch of auto noise correction (0d:disable / 1d:enable) */
+		{ SMIA_REG_8BIT, 0x1646, 0x00 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1648, 0x00 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x113E, 0x01 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x113F, 0x22 },	/* Initial setting */
+		{ SMIA_REG_8BIT, 0x1239, 0x64 },
+		{ SMIA_REG_8BIT, 0x1238, 0x02 },
+		{ SMIA_REG_8BIT, 0x123B, 0x70 },
+		{ SMIA_REG_8BIT, 0x123A, 0x07 },
+		{ SMIA_REG_8BIT, 0x121B, 0x64 },
+		{ SMIA_REG_8BIT, 0x121D, 0x64 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0x89 },
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0x54 },
+		{ SMIA_REG_8BIT, 0x125D, 0x88 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode1_16VGA_2592x1968_13.12fps_DPCM10-8 */
+static struct smia_reglist mode1_16vga_2592x1968_13_12fps_dpcm10_8 = {	/* 2 */
+/* (without the +1)
+ * SPCK       = 80 MHz
+ * CCP2       = 560 MHz
+ * VCO        = 560 MHz
+ * VCOUNT     = 84 (2016)
+ * HCOUNT     = 128 (3072)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 175
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 6
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 0
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3072,
+		.height = 2016,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 2592,
+		.window_height = 1968,
+		.pixel_clock = 80000000,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 1292
+		},
+		.max_exp = 2012,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10DPCM8,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x57 },
+		{ SMIA_REG_8BIT, 0x1238, 0x82 },
+		{ SMIA_REG_8BIT, 0x123B, 0x70 },
+		{ SMIA_REG_8BIT, 0x123A, 0x06 },
+		{ SMIA_REG_8BIT, 0x121B, 0x64 },
+		{ SMIA_REG_8BIT, 0x121D, 0x64 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0x80 },	/* <-changed to v14 7E->80 */
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0x54 },
+		{ SMIA_REG_8BIT, 0x125D, 0x83 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode3_4VGA_1296x984_29.99fps_DPCM10-8 */
+static struct smia_reglist mode3_4vga_1296x984_29_99fps_dpcm10_8 = {	/* 3 */
+/* (without the +1)
+ * SPCK       = 96.5333333333333 MHz
+ * CCP2       = 579.2 MHz
+ * VCO        = 579.2 MHz
+ * VCOUNT     = 84 (2016)
+ * HCOUNT     = 133 (3192)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 181
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 5
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 0
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3192,
+		.height = 1008,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 1296,
+		.window_height = 984,
+		.pixel_clock = 96533333,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 3000
+		},
+		.max_exp = 1004,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10DPCM8,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x5A },	/*        */
+		{ SMIA_REG_8BIT, 0x1238, 0x82 },	/*        */
+		{ SMIA_REG_8BIT, 0x123B, 0x70 },	/*        */
+		{ SMIA_REG_8BIT, 0x123A, 0x05 },	/*        */
+		{ SMIA_REG_8BIT, 0x121B, 0x63 },	/*        */
+		{ SMIA_REG_8BIT, 0x1220, 0x85 },	/*        */
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },	/*        */
+		{ SMIA_REG_8BIT, 0x1222, 0x54 },	/*        */
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },	/*        */
+		{ SMIA_REG_8BIT, 0x121D, 0x63 },
+		{ SMIA_REG_8BIT, 0x125D, 0x83 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode4_SVGA_864x656_29.88fps */
+static struct smia_reglist mode4_svga_864x656_29_88fps = {	/* 4 */
+/* (without the +1)
+ * SPCK       = 80 MHz
+ * CCP2       = 320 MHz
+ * VCO        = 640 MHz
+ * VCOUNT     = 84 (2016)
+ * HCOUNT     = 166 (3984)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 200
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 7
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 1
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3984,
+		.height = 672,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 864,
+		.window_height = 656,
+		.pixel_clock = 80000000,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 2988
+		},
+		.max_exp = 668,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x64 },
+		{ SMIA_REG_8BIT, 0x1238, 0x02 },
+		{ SMIA_REG_8BIT, 0x123B, 0x71 },
+		{ SMIA_REG_8BIT, 0x123A, 0x07 },
+		{ SMIA_REG_8BIT, 0x121B, 0x62 },
+		{ SMIA_REG_8BIT, 0x121D, 0x62 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0xA6 },
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0x54 },
+		{ SMIA_REG_8BIT, 0x125D, 0x88 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode5_VGA_648x492_29.93fps */
+static struct smia_reglist mode5_vga_648x492_29_93fps = {	/* 5 */
+/* (without the +1)
+ * SPCK       = 80 MHz
+ * CCP2       = 320 MHz
+ * VCO        = 640 MHz
+ * VCOUNT     = 84 (2016)
+ * HCOUNT     = 221 (5304)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 200
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 7
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 1
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 5304,
+		.height = 504,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 648,
+		.window_height = 492,
+		.pixel_clock = 80000000,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 2993
+		},
+		.max_exp = 500,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x64 },
+		{ SMIA_REG_8BIT, 0x1238, 0x02 },
+		{ SMIA_REG_8BIT, 0x123B, 0x71 },
+		{ SMIA_REG_8BIT, 0x123A, 0x07 },
+		{ SMIA_REG_8BIT, 0x121B, 0x61 },
+		{ SMIA_REG_8BIT, 0x121D, 0x61 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0xDD },
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0x54 },
+		{ SMIA_REG_8BIT, 0x125D, 0x88 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode2_16VGA_2592x1968_3.99fps */
+static struct smia_reglist mode2_16vga_2592x1968_3_99fps = {	/* 6 */
+/* (without the +1)
+ * SPCK       = 80 MHz
+ * CCP2       = 640 MHz
+ * VCO        = 640 MHz
+ * VCOUNT     = 254 (6096)
+ * HCOUNT     = 137 (3288)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 200
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 7
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 0
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3288,
+		.height = 6096,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 2592,
+		.window_height = 1968,
+		.pixel_clock = 80000000,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 399
+		},
+		.max_exp = 6092,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x64 },
+		{ SMIA_REG_8BIT, 0x1238, 0x02 },
+		{ SMIA_REG_8BIT, 0x123B, 0x70 },
+		{ SMIA_REG_8BIT, 0x123A, 0x07 },
+		{ SMIA_REG_8BIT, 0x121B, 0x64 },
+		{ SMIA_REG_8BIT, 0x121D, 0x64 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0x89 },
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0xFE },
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode_648x492_5fps */
+static struct smia_reglist mode_648x492_5fps = {	/* 7 */
+/* (without the +1)
+ * SPCK       = 13.3333333333333 MHz
+ * CCP2       = 53.3333333333333 MHz
+ * VCO        = 640 MHz
+ * VCOUNT     = 84 (2016)
+ * HCOUNT     = 221 (5304)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 200
+ * VCO_DIV    = 5
+ * SPCK_DIV   = 7
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 1
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 5304,
+		.height = 504,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 648,
+		.window_height = 492,
+		.pixel_clock = 13333333,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 499
+		},
+		.max_exp = 500,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x64 },
+		{ SMIA_REG_8BIT, 0x1238, 0x02 },
+		{ SMIA_REG_8BIT, 0x123B, 0x71 },
+		{ SMIA_REG_8BIT, 0x123A, 0x57 },
+		{ SMIA_REG_8BIT, 0x121B, 0x61 },
+		{ SMIA_REG_8BIT, 0x121D, 0x61 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0xDD },
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0x54 },
+		{ SMIA_REG_8BIT, 0x125D, 0x88 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode3_4VGA_1296x984_5fps */
+static struct smia_reglist mode3_4vga_1296x984_5fps = {	/* 8 */
+/* (without the +1)
+ * SPCK       = 49.4 MHz
+ * CCP2       = 395.2 MHz
+ * VCO        = 790.4 MHz
+ * VCOUNT     = 250 (6000)
+ * HCOUNT     = 137 (3288)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 247
+ * VCO_DIV    = 1
+ * SPCK_DIV   = 7
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 0
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3288,
+		.height = 3000,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 1296,
+		.window_height = 984,
+		.pixel_clock = 49400000,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 501
+		},
+		.max_exp = 2996,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x7B },
+		{ SMIA_REG_8BIT, 0x1238, 0x82 },
+		{ SMIA_REG_8BIT, 0x123B, 0x70 },
+		{ SMIA_REG_8BIT, 0x123A, 0x17 },
+		{ SMIA_REG_8BIT, 0x121B, 0x63 },
+		{ SMIA_REG_8BIT, 0x121D, 0x63 },
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },
+		{ SMIA_REG_8BIT, 0x1220, 0x89 },
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },
+		{ SMIA_REG_8BIT, 0x1222, 0xFA },
+		{ SMIA_REG_8BIT, 0x125D, 0x88 },	/* CCP_LVDS_MODE/  */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+/* Mode_4VGA_1296x984_25fps_DPCM10-8 */
+static struct smia_reglist mode_4vga_1296x984_25fps_dpcm10_8 = {	/* 9 */
+/* (without the +1)
+ * SPCK       = 84.2666666666667 MHz
+ * CCP2       = 505.6 MHz
+ * VCO        = 505.6 MHz
+ * VCOUNT     = 88 (2112)
+ * HCOUNT     = 133 (3192)
+ * CKREF_DIV  = 2
+ * CKVAR_DIV  = 158
+ * VCO_DIV    = 0
+ * SPCK_DIV   = 5
+ * MRCK_DIV   = 7
+ * LVDSCK_DIV = 0
+ */
+	.type = SMIA_REGLIST_MODE,
+	.mode = {
+		.sensor_width = 2592,
+		.sensor_height = 1968,
+		.sensor_window_origin_x = 0,
+		.sensor_window_origin_y = 0,
+		.sensor_window_width = 2592,
+		.sensor_window_height = 1968,
+		.width = 3192,
+		.height = 1056,
+		.window_origin_x = 0,
+		.window_origin_y = 0,
+		.window_width = 1296,
+		.window_height = 984,
+		.pixel_clock = 84266667,
+		.ext_clock = 9600000,
+		.timeperframe = {
+			.numerator = 100,
+			.denominator = 2500
+		},
+		.max_exp = 1052,
+		/* .max_gain = 0, */
+		.pixel_format = V4L2_PIX_FMT_SGRBG10DPCM8,
+		.sensitivity = 65536
+	},
+	.regs = {
+		{ SMIA_REG_8BIT, 0x1239, 0x4F },	/*        */
+		{ SMIA_REG_8BIT, 0x1238, 0x02 },	/*        */
+		{ SMIA_REG_8BIT, 0x123B, 0x70 },	/*        */
+		{ SMIA_REG_8BIT, 0x123A, 0x05 },	/*        */
+		{ SMIA_REG_8BIT, 0x121B, 0x63 },	/*        */
+		{ SMIA_REG_8BIT, 0x1220, 0x85 },	/*        */
+		{ SMIA_REG_8BIT, 0x1221, 0x00 },	/*        */
+		{ SMIA_REG_8BIT, 0x1222, 0x58 },	/*        */
+		{ SMIA_REG_8BIT, 0x1223, 0x00 },	/*        */
+		{ SMIA_REG_8BIT, 0x121D, 0x63 },	/*        */
+		{ SMIA_REG_8BIT, 0x125D, 0x83 },	/*        */
+		{ SMIA_REG_TERM, 0, 0}
+	}
+};
+
+static struct smia_meta_reglist et8ek8_smia_meta_reglist = {
+	.magic   = SMIA_MAGIC,
+	.version = "V14 03-June-2008",
+	.reglist = {
+		{ .ptr = &mode1_poweron_mode2_16vga_2592x1968_12_07fps },
+		{ .ptr = &mode1_16vga_2592x1968_13_12fps_dpcm10_8 },
+		{ .ptr = &mode3_4vga_1296x984_29_99fps_dpcm10_8 },
+		{ .ptr = &mode4_svga_864x656_29_88fps },
+		{ .ptr = &mode5_vga_648x492_29_93fps },
+		{ .ptr = &mode2_16vga_2592x1968_3_99fps },
+		{ .ptr = &mode_648x492_5fps },
+		{ .ptr = &mode3_4vga_1296x984_5fps },
+		{ .ptr = &mode_4vga_1296x984_25fps_dpcm10_8 },
+		{ .ptr = 0 }
+	}
+};
+
+/*
+ * Return time of one row in microseconds, .8 fixed point format.
+ * If the sensor is not set to any mode, return zero.
+ */
+static int et8ek8_get_row_time(struct et8ek8_sensor *sensor)
+{
+	unsigned int clock;	/* Pixel clock in Hz>>10 fixed point */
+	unsigned int rt;	/* Row time in .8 fixed point */
+
+	if (!sensor->current_reglist)
+		return 0;
+
+	clock = sensor->current_reglist->mode.pixel_clock;
+	clock = (clock + (1 << 9)) >> 10;
+	rt = sensor->current_reglist->mode.width * (1000000 >> 2);
+	rt = (rt + (clock >> 1)) / clock;
+
+	return rt;
+}
+
+/*
+ * Convert exposure time `us' to rows. Modify `us' to make it to
+ * correspond to the actual exposure time.
+ */
+static int et8ek8_exposure_us_to_rows(struct et8ek8_sensor *sensor, u32 *us)
+{
+	unsigned int rows;	/* Exposure value as written to HW (ie. rows) */
+	unsigned int rt;	/* Row time in .8 fixed point */
+
+	/* Assume that the maximum exposure time is at most ~8 s,
+	 * and the maximum width (with blanking) ~8000 pixels.
+	 * The formula here is in principle as simple as
+	 *    rows = exptime / 1e6 / width * pixel_clock
+	 * but to get accurate results while coping with value ranges,
+	 * have to do some fixed point math.
+	 */
+
+	rt = et8ek8_get_row_time(sensor);
+	rows = ((*us << 8) + (rt >> 1)) / rt;
+
+	if (rows > sensor->current_reglist->mode.max_exp)
+		rows = sensor->current_reglist->mode.max_exp;
+
+	/* Set the exposure time to the rounded value */
+	*us = (rt * rows + (1 << 7)) >> 8;
+
+	return rows;
+}
+
+/*
+ * Convert exposure time in rows to microseconds
+ */
+static int et8ek8_exposure_rows_to_us(struct et8ek8_sensor *sensor, int rows)
+{
+	return (et8ek8_get_row_time(sensor) * rows + (1 << 7)) >> 8;
+}
+
+/* Called to change the V4L2 gain control value. This function
+ * rounds and clamps the given value and updates the V4L2 control value.
+ * If power is on, also updates the sensor analog and digital gains.
+ * gain is in 0.1 EV (exposure value) units.
+ */
+static int et8ek8_set_gain(struct et8ek8_sensor *sensor, s32 gain)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	struct et8ek8_gain new;
+	int r;
+
+	new = et8ek8_gain_table[gain];
+
+	/* FIXME: optimise I2C writes! */
+	r = smia_i2c_write_reg(client, SMIA_REG_8BIT,
+				0x124a, new.analog >> 8);
+	if (r)
+		return r;
+	r = smia_i2c_write_reg(client, SMIA_REG_8BIT,
+				0x1249, new.analog & 0xff);
+	if (r)
+		return r;
+
+	r = smia_i2c_write_reg(client, SMIA_REG_8BIT,
+				0x124d, new.digital >> 8);
+	if (r)
+		return r;
+	r = smia_i2c_write_reg(client, SMIA_REG_8BIT,
+				0x124c, new.digital & 0xff);
+
+	return r;
+}
+
+static int et8ek8_set_test_pattern(struct et8ek8_sensor *sensor, s32 mode)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	int cbh_mode, cbv_mode, tp_mode, din_sw, r1420, rval;
+
+	/* Values for normal mode */
+	cbh_mode = 0;
+	cbv_mode = 0;
+	tp_mode  = 0;
+	din_sw   = 0x00;
+	r1420    = 0xF0;
+
+	if (mode != 0) {
+		/* Test pattern mode */
+		if (mode < 5) {
+			cbh_mode = 1;
+			cbv_mode = 1;
+			tp_mode  = mode + 3;
+		} else {
+			cbh_mode = 0;
+			cbv_mode = 0;
+			tp_mode  = mode - 4 + 3;
+		}
+		din_sw   = 0x01;
+		r1420    = 0xE0;
+	}
+
+	rval = smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x111B, tp_mode << 4);
+	if (rval)
+		goto out;
+
+	rval = smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x1121, cbh_mode << 7);
+	if (rval)
+		goto out;
+
+	rval = smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x1124, cbv_mode << 7);
+	if (rval)
+		goto out;
+
+	rval = smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x112C, din_sw);
+	if (rval)
+		goto out;
+
+	rval = smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x1420, r1420);
+	if (rval)
+		goto out;
+
+out:
+	return rval;
+}
+
+/* -----------------------------------------------------------------------------
+ * V4L2 controls
+ */
+
+static int et8ek8_get_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct et8ek8_sensor *sensor =
+		container_of(ctrl->handler, struct et8ek8_sensor, ctrl_handler);
+	const struct smia_mode *mode = &sensor->current_reglist->mode;
+
+	switch (ctrl->id) {
+	case V4L2_CID_MODE_FRAME_WIDTH:
+		ctrl->cur.val = mode->width;
+		break;
+	case V4L2_CID_MODE_FRAME_HEIGHT:
+		ctrl->cur.val = mode->height;
+		break;
+	case V4L2_CID_MODE_VISIBLE_WIDTH:
+		ctrl->cur.val = mode->window_width;
+		break;
+	case V4L2_CID_MODE_VISIBLE_HEIGHT:
+		ctrl->cur.val = mode->window_height;
+		break;
+	case V4L2_CID_MODE_PIXELCLOCK:
+		ctrl->cur.val = mode->pixel_clock;
+		break;
+	case V4L2_CID_MODE_SENSITIVITY:
+		ctrl->cur.val = mode->sensitivity;
+		break;
+	case V4L2_CID_MODE_OPSYSCLOCK:
+		ctrl->cur.val = mode->opsys_clock;
+		break;
+	}
+
+	return 0;
+}
+
+static int et8ek8_set_ctrl(struct v4l2_ctrl *ctrl)
+{
+	struct et8ek8_sensor *sensor =
+		container_of(ctrl->handler, struct et8ek8_sensor, ctrl_handler);
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+	int uninitialized_var(rows);
+
+	if (ctrl->id == V4L2_CID_EXPOSURE)
+		rows = et8ek8_exposure_us_to_rows(sensor, (u32 *)&ctrl->val);
+
+	switch (ctrl->id) {
+	case V4L2_CID_GAIN:
+		return et8ek8_set_gain(sensor, ctrl->val);
+
+	case V4L2_CID_EXPOSURE:
+		return smia_i2c_write_reg(client, SMIA_REG_16BIT, 0x1243,
+					  swab16(rows));
+
+	case V4L2_CID_TEST_PATTERN:
+		return et8ek8_set_test_pattern(sensor, ctrl->val);
+
+	case V4L2_CID_PIXEL_RATE:
+		/* For v4l2_ctrl_s_ctrl_int64() used internally. */
+		return 0;
+
+	default:
+		return -EINVAL;
+	}
+}
+
+static const struct v4l2_ctrl_ops et8ek8_ctrl_ops = {
+	.g_volatile_ctrl = et8ek8_get_ctrl,
+	.s_ctrl = et8ek8_set_ctrl,
+};
+
+static const char *et8ek8_test_pattern_menu[] = {
+	"Normal",
+	"Vertical colorbar",
+	"Horizontal colorbar",
+	"Scale",
+	"Ramp",
+	"Small vertical colorbar",
+	"Small horizontal colorbar",
+	"Small scale",
+	"Small ramp",
+};
+
+static const struct v4l2_ctrl_config et8ek8_ctrls[] = {
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_TEST_PATTERN,
+		.type		= V4L2_CTRL_TYPE_MENU,
+		.name		= "Test pattern mode",
+		.min		= 0,
+		.max		= ARRAY_SIZE(et8ek8_test_pattern_menu) - 1,
+		.step		= 0,
+		.def		= 0,
+		.flags		= 0,
+		.qmenu		= et8ek8_test_pattern_menu,
+	},
+	{
+		.id		= V4L2_CID_MODE_CLASS,
+		.type		= V4L2_CTRL_TYPE_CTRL_CLASS,
+		.name		= "SMIA-type sensor information",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				| V4L2_CTRL_FLAG_WRITE_ONLY,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_FRAME_WIDTH,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Frame width",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_FRAME_HEIGHT,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Frame height",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_VISIBLE_WIDTH,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Visible width",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_VISIBLE_HEIGHT,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Visible height",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_PIXELCLOCK,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Pixel clock [Hz]",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_SENSITIVITY,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Sensivity",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+	{
+		.ops		= &et8ek8_ctrl_ops,
+		.id		= V4L2_CID_MODE_OPSYSCLOCK,
+		.type		= V4L2_CTRL_TYPE_INTEGER,
+		.name		= "Output pixel clock [Hz]",
+		.min		= 0,
+		.max		= 0,
+		.step		= 1,
+		.def		= 0,
+		.flags		= V4L2_CTRL_FLAG_READ_ONLY
+				  | V4L2_CTRL_FLAG_VOLATILE,
+	},
+};
+
+static int et8ek8_init_controls(struct et8ek8_sensor *sensor)
+{
+	unsigned int i;
+	u32 min, max;
+
+	v4l2_ctrl_handler_init(&sensor->ctrl_handler,
+			       ARRAY_SIZE(et8ek8_ctrls) + 2);
+
+	/* V4L2_CID_GAIN */
+	v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops,
+			  V4L2_CID_GAIN, 0, ARRAY_SIZE(et8ek8_gain_table) - 1,
+			  1, 0);
+
+	/* V4L2_CID_EXPOSURE */
+	min = et8ek8_exposure_rows_to_us(sensor, 1);
+	max = et8ek8_exposure_rows_to_us(sensor,
+				sensor->current_reglist->mode.max_exp);
+	sensor->exposure =
+		v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops,
+				  V4L2_CID_EXPOSURE, min, max, min, max);
+	sensor->pixel_rate =
+		v4l2_ctrl_new_std(&sensor->ctrl_handler, &et8ek8_ctrl_ops,
+		V4L2_CID_PIXEL_RATE, 1, INT_MAX, 1, 1);
+
+	/* V4L2_CID_TEST_PATTERN and V4L2_CID_MODE_* */
+	for (i = 0; i < ARRAY_SIZE(et8ek8_ctrls); ++i)
+		v4l2_ctrl_new_custom(&sensor->ctrl_handler, &et8ek8_ctrls[i],
+				     NULL);
+
+	if (sensor->ctrl_handler.error)
+		return sensor->ctrl_handler.error;
+
+	sensor->subdev.ctrl_handler = &sensor->ctrl_handler;
+	return 0;
+}
+
+static void et8ek8_update_controls(struct et8ek8_sensor *sensor)
+{
+	struct v4l2_ctrl *ctrl = sensor->exposure;
+	u32 min, max;
+
+	min = et8ek8_exposure_rows_to_us(sensor, 1);
+	max = et8ek8_exposure_rows_to_us(sensor,
+					 sensor->current_reglist->mode.max_exp);
+
+	v4l2_ctrl_lock(ctrl);
+	ctrl->minimum = min;
+	ctrl->maximum = max;
+	ctrl->step = min;
+	ctrl->default_value = max;
+	ctrl->val = max;
+	ctrl->cur.val = max;
+	__v4l2_ctrl_s_ctrl_int64(sensor->pixel_rate,
+				 sensor->current_reglist->mode.ext_clock);
+	v4l2_ctrl_unlock(ctrl);
+}
+
+static int et8ek8_configure(struct et8ek8_sensor *sensor)
+{
+	struct v4l2_subdev *subdev = &sensor->subdev;
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	int rval;
+
+	rval = smia_i2c_write_regs(client, sensor->current_reglist->regs);
+	if (rval)
+		goto fail;
+
+	/* Controls set while the power to the sensor is turned off are saved
+	 * but not applied to the hardware. Now that we're about to start
+	 * streaming apply all the current values to the hardware.
+	 */
+	rval = v4l2_ctrl_handler_setup(&sensor->ctrl_handler);
+	if (rval)
+		goto fail;
+
+	return 0;
+
+fail:
+	dev_err(&client->dev, "sensor configuration failed\n");
+	return rval;
+}
+
+static int et8ek8_stream_on(struct et8ek8_sensor *sensor)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+
+	return smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x1252, 0xb0);
+}
+
+static int et8ek8_stream_off(struct et8ek8_sensor *sensor)
+{
+	struct i2c_client *client = v4l2_get_subdevdata(&sensor->subdev);
+
+	return smia_i2c_write_reg(client, SMIA_REG_8BIT, 0x1252, 0x30);
+}
+
+static int et8ek8_s_stream(struct v4l2_subdev *subdev, int streaming)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	int ret;
+
+	if (!streaming)
+		return et8ek8_stream_off(sensor);
+
+	ret = et8ek8_configure(sensor);
+	if (ret < 0)
+		return ret;
+
+	return et8ek8_stream_on(sensor);
+}
+
+/* --------------------------------------------------------------------------
+ * V4L2 subdev operations
+ */
+
+static int et8ek8_power_off(struct et8ek8_sensor *sensor)
+{
+	int rval;
+
+	gpiod_set_value(sensor->reset, 0);
+	udelay(1);
+
+	clk_disable_unprepare(sensor->ext_clk);
+
+	rval = regulator_disable(sensor->vana);
+	return rval;
+}
+
+static int et8ek8_power_on(struct et8ek8_sensor *sensor)
+{
+	struct v4l2_subdev *subdev = &sensor->subdev;
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	unsigned int hz = ET8EK8_XCLK_HZ;
+	int val, rval;
+
+	rval = regulator_enable(sensor->vana);
+	if (rval) {
+		dev_err(&client->dev, "failed to enable vana regulator\n");
+		return rval;
+	}
+
+	if (sensor->current_reglist)
+		hz = sensor->current_reglist->mode.ext_clock;
+
+	rval = clk_set_rate(sensor->ext_clk, hz);
+	if (rval < 0) {
+		dev_err(&client->dev,
+			"unable to set extclk clock freq to %u\n", hz);
+		goto out;
+	}
+	rval = clk_prepare_enable(sensor->ext_clk);
+	if (rval < 0) {
+		dev_err(&client->dev, "failed to enable extclk\n");
+		goto out;
+	}
+
+	if (rval)
+		goto out;
+
+	udelay(10);			/* I wish this is a good value */
+
+	gpiod_set_value(sensor->reset, 1);
+
+	msleep(5000*1000/hz+1);				/* Wait 5000 cycles */
+
+	rval = smia_i2c_reglist_find_write(client,
+					   &et8ek8_smia_meta_reglist,
+					   SMIA_REGLIST_POWERON);
+	if (rval)
+		goto out;
+
+#ifdef USE_CRC
+	rval = smia_i2c_read_reg(client,
+				 SMIA_REG_8BIT, 0x1263, &val);
+	if (rval)
+		goto out;
+#if USE_CRC
+	val |= (1<<4);
+#else
+	val &= ~(1<<4);
+#endif
+	rval = smia_i2c_write_reg(client,
+				  SMIA_REG_8BIT, 0x1263, val);
+	if (rval)
+		goto out;
+#endif
+
+out:
+	if (rval)
+		et8ek8_power_off(sensor);
+
+	return rval;
+}
+
+/* --------------------------------------------------------------------------
+ * V4L2 subdev video operations
+ */
+
+static int et8ek8_enum_mbus_code(struct v4l2_subdev *subdev,
+				 struct v4l2_subdev_pad_config *cfg,
+				 struct v4l2_subdev_mbus_code_enum *code)
+{
+	return smia_reglist_enum_mbus_code(&et8ek8_smia_meta_reglist, code);
+}
+
+static int et8ek8_enum_frame_size(struct v4l2_subdev *subdev,
+				  struct v4l2_subdev_pad_config *cfg,
+				  struct v4l2_subdev_frame_size_enum *fse)
+{
+	return smia_reglist_enum_frame_size(&et8ek8_smia_meta_reglist, fse);
+}
+
+static int et8ek8_enum_frame_ival(struct v4l2_subdev *subdev,
+				  struct v4l2_subdev_pad_config *cfg,
+				  struct v4l2_subdev_frame_interval_enum *fie)
+{
+	return smia_reglist_enum_frame_ival(&et8ek8_smia_meta_reglist, fie);
+}
+
+static struct v4l2_mbus_framefmt *
+__et8ek8_get_pad_format(struct et8ek8_sensor *sensor,
+			struct v4l2_subdev_pad_config *cfg,
+			unsigned int pad, enum v4l2_subdev_format_whence which)
+{
+	switch (which) {
+	case V4L2_SUBDEV_FORMAT_TRY:
+		return v4l2_subdev_get_try_format(&sensor->subdev, cfg, pad);
+	case V4L2_SUBDEV_FORMAT_ACTIVE:
+		return &sensor->format;
+	default: 
+		return NULL;
+	}
+}
+
+static int et8ek8_get_pad_format(struct v4l2_subdev *subdev,
+				 struct v4l2_subdev_pad_config *cfg,
+				 struct v4l2_subdev_format *fmt)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	struct v4l2_mbus_framefmt *format;
+ 
+	format = __et8ek8_get_pad_format(sensor, cfg, fmt->pad, fmt->which);
+	if (format == NULL)
+		return -EINVAL;
+
+	fmt->format = *format;
+	return 0;
+}
+
+static int et8ek8_set_pad_format(struct v4l2_subdev *subdev,
+				 struct v4l2_subdev_pad_config *cfg,
+				 struct v4l2_subdev_format *fmt)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	struct v4l2_mbus_framefmt *format;
+        struct smia_reglist *reglist;
+
+	format = __et8ek8_get_pad_format(sensor, cfg, fmt->pad, fmt->which);
+	if (format == NULL)
+		return -EINVAL;
+
+	reglist = smia_reglist_find_mode_fmt(&et8ek8_smia_meta_reglist,
+					     &fmt->format);
+	smia_reglist_to_mbus(reglist, &fmt->format);
+	*format = fmt->format;
+
+	if (fmt->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
+		sensor->current_reglist = reglist;
+		et8ek8_update_controls(sensor);
+	}
+
+	return 0;
+}
+
+static int et8ek8_get_frame_interval(struct v4l2_subdev *subdev,
+				     struct v4l2_subdev_frame_interval *fi)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+
+	memset(fi, 0, sizeof(*fi));
+	fi->interval = sensor->current_reglist->mode.timeperframe;
+
+	return 0;
+}
+
+static int et8ek8_set_frame_interval(struct v4l2_subdev *subdev,
+				     struct v4l2_subdev_frame_interval *fi)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	struct smia_reglist *reglist;
+
+	reglist = smia_reglist_find_mode_ival(&et8ek8_smia_meta_reglist,
+					      sensor->current_reglist,
+					      &fi->interval);
+
+	if (!reglist)
+		return -EINVAL;
+
+	if (sensor->current_reglist->mode.ext_clock != reglist->mode.ext_clock)
+		return -EINVAL;
+
+	sensor->current_reglist = reglist;
+	et8ek8_update_controls(sensor);
+
+	return 0;
+}
+
+static int et8ek8_g_priv_mem(struct v4l2_subdev *subdev)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	unsigned int length = ET8EK8_PRIV_MEM_SIZE;
+	unsigned int offset = 0;
+	u8 *ptr  = sensor->priv_mem;
+	int rval = 0;
+
+	/* Read the EEPROM window-by-window, each window 8 bytes */
+	do {
+		u8 buffer[PRIV_MEM_WIN_SIZE];
+		struct i2c_msg msg;
+		int bytes, i;
+		int ofs;
+
+		/* Set the current window */
+		rval = smia_i2c_write_reg(client,
+					  SMIA_REG_8BIT,
+					  0x0001,
+					  0xe0 | (offset >> 3));
+		if (rval < 0)
+			goto out;
+
+		/* Wait for status bit */
+		for (i = 0; i < 1000; ++i) {
+			u32 status;
+			rval = smia_i2c_read_reg(client,
+						 SMIA_REG_8BIT,
+						 0x0003,
+						 &status);
+			if (rval < 0)
+				goto out;
+			if ((status & 0x08) == 0)
+				break;
+			msleep(1);
+		};
+
+		if (i == 1000) {
+			rval = -EIO;
+			goto out;
+		}
+
+		/* Read window, 8 bytes at once, and copy to user space */
+		ofs = offset & 0x07;	/* Offset within this window */
+		bytes = length + ofs > 8 ? 8-ofs : length;
+		msg.addr = client->addr;
+		msg.flags = 0;
+		msg.len = 2;
+		msg.buf = buffer;
+		ofs += PRIV_MEM_START_REG;
+		buffer[0] = (u8)(ofs >> 8);
+		buffer[1] = (u8)(ofs & 0xFF);
+		rval = i2c_transfer(client->adapter, &msg, 1);
+		if (rval < 0)
+			goto out;
+		mdelay(ET8EK8_I2C_DELAY);
+		msg.addr = client->addr;
+		msg.len = bytes;
+		msg.flags = I2C_M_RD;
+		msg.buf = buffer;
+		memset(buffer, 0, sizeof(buffer));
+		rval = i2c_transfer(client->adapter, &msg, 1);
+		if (rval < 0)
+			goto out;
+		rval = 0;
+		memcpy(ptr, buffer, bytes);
+
+		length -= bytes;
+		offset += bytes;
+		ptr    += bytes;
+	} while (length > 0);
+
+out:
+	return rval;
+}
+
+static int et8ek8_dev_init(struct v4l2_subdev *subdev)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	int rval, rev_l, rev_h;
+
+	rval = et8ek8_power_on(sensor);
+	if (rval) {
+		dev_err(&client->dev, "could not power on\n");
+		return rval;
+	}
+
+	if (smia_i2c_read_reg(client, SMIA_REG_8BIT,
+			      REG_REVISION_NUMBER_L, &rev_l) != 0
+	    || smia_i2c_read_reg(client, SMIA_REG_8BIT,
+				 REG_REVISION_NUMBER_H, &rev_h) != 0) {
+		dev_err(&client->dev,
+			"no et8ek8 sensor detected\n");
+		rval = -ENODEV;
+		goto out_poweroff;
+	}
+	sensor->version = (rev_h << 8) + rev_l;
+	if (sensor->version != ET8EK8_REV_1
+	    && sensor->version != ET8EK8_REV_2)
+		dev_info(&client->dev,
+			 "unknown version 0x%x detected, "
+			 "continuing anyway\n", sensor->version);
+
+	rval = smia_reglist_import(&et8ek8_smia_meta_reglist);
+	if (rval) {
+		dev_err(&client->dev,
+			"invalid register list %s, import failed\n",
+			ET8EK8_NAME);
+		goto out_poweroff;
+	}
+
+	sensor->current_reglist =
+		smia_reglist_find_type(&et8ek8_smia_meta_reglist,
+				       SMIA_REGLIST_MODE);
+	if (!sensor->current_reglist) {
+		dev_err(&client->dev,
+			"invalid register list %s, no mode found\n",
+			ET8EK8_NAME);
+		rval = -ENODEV;
+		goto out_poweroff;
+	}
+
+	smia_reglist_to_mbus(sensor->current_reglist, &sensor->format);
+
+	rval = smia_i2c_reglist_find_write(client,
+					   &et8ek8_smia_meta_reglist,
+					   SMIA_REGLIST_POWERON);
+	if (rval) {
+		dev_err(&client->dev,
+			"invalid register list %s, no POWERON mode found\n",
+			ET8EK8_NAME);
+		goto out_poweroff;
+	}
+	rval = et8ek8_stream_on(sensor);	/* Needed to be able to read EEPROM */
+	if (rval)
+		goto out_poweroff;
+	rval = et8ek8_g_priv_mem(subdev);
+	if (rval)
+		dev_warn(&client->dev,
+			"can not read OTP (EEPROM) memory from sensor\n");
+	rval = et8ek8_stream_off(sensor);
+	if (rval)
+		goto out_poweroff;
+
+	rval = et8ek8_power_off(sensor);
+	if (rval)
+		goto out_poweroff;
+
+	return 0;
+
+out_poweroff:
+	et8ek8_power_off(sensor);
+
+	return rval;
+}
+
+/* --------------------------------------------------------------------------
+ * sysfs attributes
+ */
+static ssize_t
+et8ek8_priv_mem_read(struct device *dev, struct device_attribute *attr,
+		     char *buf)
+{
+	struct v4l2_subdev *subdev = i2c_get_clientdata(to_i2c_client(dev));
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+
+#if PAGE_SIZE < ET8EK8_PRIV_MEM_SIZE
+#error PAGE_SIZE too small!
+#endif
+
+	memcpy(buf, sensor->priv_mem, ET8EK8_PRIV_MEM_SIZE);
+
+	return ET8EK8_PRIV_MEM_SIZE;
+}
+static DEVICE_ATTR(priv_mem, S_IRUGO, et8ek8_priv_mem_read, NULL);
+
+/* --------------------------------------------------------------------------
+ * V4L2 subdev core operations
+ */
+
+static int
+et8ek8_registered(struct v4l2_subdev *subdev)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	struct i2c_client *client = v4l2_get_subdevdata(subdev);
+	struct v4l2_mbus_framefmt *format;
+	int rval;
+
+	dev_dbg(&client->dev, "registered!");
+
+	if (device_create_file(&client->dev, &dev_attr_priv_mem) != 0) {
+		dev_err(&client->dev, "could not register sysfs entry\n");
+		return -EBUSY;
+	}
+
+	rval = et8ek8_dev_init(subdev);
+	if (rval)
+		return rval;
+
+	rval = et8ek8_init_controls(sensor);
+	if (rval) {
+		dev_err(&client->dev, "controls initialization failed\n");
+		return rval;
+	}
+
+	format = __et8ek8_get_pad_format(sensor, NULL, 0,
+					 V4L2_SUBDEV_FORMAT_ACTIVE);
+	return 0;
+}
+
+static int __et8ek8_set_power(struct et8ek8_sensor *sensor, bool on)
+{
+	return on ? et8ek8_power_on(sensor) : et8ek8_power_off(sensor);
+}
+
+static int et8ek8_set_power(struct v4l2_subdev *subdev, int on)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+	int ret = 0;
+
+	mutex_lock(&sensor->power_lock);
+
+	/* If the power count is modified from 0 to != 0 or from != 0 to 0,
+	 * update the power state.
+	 */
+	if (sensor->power_count == !on) {
+		ret = __et8ek8_set_power(sensor, !!on);
+		if (ret < 0)
+			goto done;
+	}
+
+	/* Update the power count. */
+	sensor->power_count += on ? 1 : -1;
+	WARN_ON(sensor->power_count < 0);
+
+done:
+	mutex_unlock(&sensor->power_lock);
+	return ret;
+}
+
+static int et8ek8_open(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(sd);
+	struct v4l2_mbus_framefmt *format;
+	struct smia_reglist *reglist;
+
+	reglist = smia_reglist_find_type(&et8ek8_smia_meta_reglist,
+					 SMIA_REGLIST_MODE);
+	format = __et8ek8_get_pad_format(sensor, fh->pad, 0, V4L2_SUBDEV_FORMAT_TRY);
+	smia_reglist_to_mbus(reglist, format);
+
+	return et8ek8_set_power(sd, true);
+}
+
+static int et8ek8_close(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
+{
+	return et8ek8_set_power(sd, false);
+}
+
+static const struct v4l2_subdev_video_ops et8ek8_video_ops = {
+	.s_stream = et8ek8_s_stream,
+	.g_frame_interval = et8ek8_get_frame_interval,
+	.s_frame_interval = et8ek8_set_frame_interval,
+};
+
+static const struct v4l2_subdev_core_ops et8ek8_core_ops = {
+	.s_power = et8ek8_set_power,
+};
+
+static const struct v4l2_subdev_pad_ops et8ek8_pad_ops = {
+	.enum_mbus_code = et8ek8_enum_mbus_code,
+        .enum_frame_size = et8ek8_enum_frame_size,
+        .enum_frame_interval = et8ek8_enum_frame_ival,
+	.get_fmt = et8ek8_get_pad_format,
+	.set_fmt = et8ek8_set_pad_format,
+};
+
+static const struct v4l2_subdev_ops et8ek8_ops = {
+	.core = &et8ek8_core_ops,
+	.video = &et8ek8_video_ops,
+	.pad = &et8ek8_pad_ops,
+};
+
+static const struct v4l2_subdev_internal_ops et8ek8_internal_ops = {
+	.registered = et8ek8_registered,
+	.open = et8ek8_open,
+	.close = et8ek8_close,
+};
+
+/* --------------------------------------------------------------------------
+ * I2C driver
+ */
+#ifdef CONFIG_PM
+
+static int et8ek8_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+
+	if (!sensor->power_count)
+		return 0;
+
+	return __et8ek8_set_power(sensor, false);
+}
+
+static int et8ek8_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+
+	if (!sensor->power_count)
+		return 0;
+
+	return __et8ek8_set_power(sensor, true);
+}
+
+static struct dev_pm_ops et8ek8_pm_ops = {
+	.suspend	= et8ek8_suspend,
+	.resume		= et8ek8_resume,
+};
+
+#else
+
+#define et8ek8_pm_ops	NULL
+
+#endif /* CONFIG_PM */
+
+static int et8ek8_probe(struct i2c_client *client,
+			const struct i2c_device_id *devid)
+{
+	struct et8ek8_sensor *sensor;
+	int ret;
+
+	sensor = devm_kzalloc(&client->dev, sizeof(*sensor), GFP_KERNEL);
+	if (!sensor)
+		return -ENOMEM;
+
+	sensor->reset = devm_gpiod_get(&client->dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(sensor->reset)) {
+		dev_dbg(&client->dev, "could not request reset gpio\n");
+		return PTR_ERR(sensor->reset);;
+	}
+
+	sensor->vana = devm_regulator_get(&client->dev, "vana");
+	if (IS_ERR(sensor->vana)) {
+		dev_err(&client->dev, "could not get regulator for vana\n");
+		return PTR_ERR(sensor->vana);
+	}
+
+	sensor->ext_clk = devm_clk_get(&client->dev, "extclk");
+	if (IS_ERR(sensor->ext_clk)) {
+		dev_err(&client->dev, "could not get clock\n");
+		return PTR_ERR(sensor->ext_clk);
+	}
+
+	mutex_init(&sensor->power_lock);
+
+	v4l2_i2c_subdev_init(&sensor->subdev, client, &et8ek8_ops);
+	sensor->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
+	sensor->subdev.internal_ops = &et8ek8_internal_ops;
+
+	sensor->pad.flags = MEDIA_PAD_FL_SOURCE;
+	ret = media_entity_pads_init(&sensor->subdev.entity, 1, &sensor->pad);
+	if (ret < 0) {
+		dev_err(&client->dev, "media entity init failed!\n");
+		return ret;
+	}
+
+	ret = v4l2_async_register_subdev(&sensor->subdev);
+	if (ret < 0) {
+		media_entity_cleanup(&sensor->subdev.entity);
+		return ret;
+	}
+
+	dev_dbg(&client->dev, "initialized!\n");
+
+	return 0;
+}
+
+static int __exit et8ek8_remove(struct i2c_client *client)
+{
+	struct v4l2_subdev *subdev = i2c_get_clientdata(client);
+	struct et8ek8_sensor *sensor = to_et8ek8_sensor(subdev);
+
+	if (sensor->power_count) {
+		gpiod_set_value(sensor->reset, 0);
+		clk_disable_unprepare(sensor->ext_clk);
+		sensor->power_count = 0;
+	}
+
+	v4l2_device_unregister_subdev(&sensor->subdev);
+	device_remove_file(&client->dev, &dev_attr_priv_mem);
+	v4l2_ctrl_handler_free(&sensor->ctrl_handler);
+	media_entity_cleanup(&sensor->subdev.entity);
+
+	return 0;
+}
+
+static const struct of_device_id et8ek8_of_table[] = {
+	{ .compatible = "toshiba,et8ek8" },
+	{ },
+};
+
+static const struct i2c_device_id et8ek8_id_table[] = {
+	{ ET8EK8_NAME, 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, et8ek8_id_table);
+
+static struct i2c_driver et8ek8_i2c_driver = {
+	.driver		= {
+		.name	= ET8EK8_NAME,
+		.pm	= &et8ek8_pm_ops,
+		.of_match_table	= et8ek8_of_table,
+	},
+	.probe		= et8ek8_probe,
+	.remove		= __exit_p(et8ek8_remove),
+	.id_table	= et8ek8_id_table,
+};
+
+module_i2c_driver(et8ek8_i2c_driver);
+
+MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>");
+MODULE_DESCRIPTION("Toshiba ET8EK8 camera sensor driver");
+MODULE_LICENSE("GPL");
