[thirdparty/openembedded/openembedded-core-contrib.git] /

From 635f44cfde6c057a2ecbb8c9d9a67225e53b6545 Mon Sep 17 00:00:00 2001
From: Roger Quadros <roger.quadros@nokia.com>
Date: Wed, 10 Mar 2010 17:32:44 +0200
Subject: [PATCH 3/10] OMAP: DSS2: Add ACX565AKM Panel Driver

From: Roger Quadros <roger.quadros@nokia.com>

Patch-mainline: 2.6.35?
Git-repo: http://www.gitorious.org/linux-omap-dss2/linux/commit/4f2308f3be2fe631412ea85a80c91414c3bfe730

This is the panel used on Nokia N900

Signed-off-by: Roger Quadros <roger.quadros@nokia.com>
---
 drivers/video/omap2/displays/Kconfig           |    6 +
 drivers/video/omap2/displays/Makefile          |    1 +
 drivers/video/omap2/displays/panel-acx565akm.c |  760 ++++++++++++++++++++++++
 3 files changed, 767 insertions(+), 0 deletions(-)
 create mode 100644 drivers/video/omap2/displays/panel-acx565akm.c

diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig
index b12a59c..1f5b7d1 100644
--- a/drivers/video/omap2/displays/Kconfig
+++ b/drivers/video/omap2/displays/Kconfig
@@ -19,4 +19,10 @@ config PANEL_TAAL
         help
           Taal DSI command mode panel from TPO.
 
+config PANEL_ACX565AKM
+       tristate "ACX565AKM Panel"
+       depends on OMAP2_DSS_SDI
+       select BACKLIGHT_CLASS_DEVICE
+       help
+         This is the LCD panel used on Nokia N900
 endmenu
diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile
index 9556464..0af16b7 100644
--- a/drivers/video/omap2/displays/Makefile
+++ b/drivers/video/omap2/displays/Makefile
@@ -2,3 +2,4 @@ obj-$(CONFIG_PANEL_GENERIC) += panel-generic.o
 obj-$(CONFIG_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o
 
 obj-$(CONFIG_PANEL_TAAL) += panel-taal.o
+obj-$(CONFIG_PANEL_ACX565AKM) += panel-acx565akm.o
diff --git a/drivers/video/omap2/displays/panel-acx565akm.c b/drivers/video/omap2/displays/panel-acx565akm.c
new file mode 100644
index 0000000..27e9847
--- /dev/null
+++ b/drivers/video/omap2/displays/panel-acx565akm.c
@@ -0,0 +1,760 @@
+/*
+ * Support for ACX565AKM LCD Panel used on Nokia N900
+ *
+ * Copyright (C) 2010 Nokia Corporation
+ *
+ * Original Driver Author: Imre Deak <imre.deak@nokia.com>
+ * Based on panel-generic.c by Tomi Valkeinen <tomi.valkeinen@nokia.com>
+ * Adapted to new DSS2 framework: Roger Quadros <roger.quadros@nokia.com>
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/spi/spi.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+
+#include <plat/display.h>
+
+#define MIPID_CMD_READ_DISP_ID         0x04
+#define MIPID_CMD_READ_RED             0x06
+#define MIPID_CMD_READ_GREEN           0x07
+#define MIPID_CMD_READ_BLUE            0x08
+#define MIPID_CMD_READ_DISP_STATUS     0x09
+#define MIPID_CMD_RDDSDR               0x0F
+#define MIPID_CMD_SLEEP_IN             0x10
+#define MIPID_CMD_SLEEP_OUT            0x11
+#define MIPID_CMD_DISP_OFF             0x28
+#define MIPID_CMD_DISP_ON              0x29
+#define MIPID_CMD_WRITE_DISP_BRIGHTNESS        0x51
+#define MIPID_CMD_READ_DISP_BRIGHTNESS 0x52
+#define MIPID_CMD_WRITE_CTRL_DISP      0x53
+
+#define CTRL_DISP_BRIGHTNESS_CTRL_ON   (1 << 5)
+#define CTRL_DISP_AMBIENT_LIGHT_CTRL_ON        (1 << 4)
+#define CTRL_DISP_BACKLIGHT_ON         (1 << 2)
+#define CTRL_DISP_AUTO_BRIGHTNESS_ON   (1 << 1)
+
+#define MIPID_CMD_READ_CTRL_DISP       0x54
+#define MIPID_CMD_WRITE_CABC           0x55
+#define MIPID_CMD_READ_CABC            0x56
+
+#define MIPID_VER_LPH8923              3
+#define MIPID_VER_LS041Y3              4
+#define MIPID_VER_L4F00311             8
+#define MIPID_VER_ACX565AKM            9
+
+struct acx565akm_device {
+       char            *name;
+       int             enabled;
+       int             model;
+       int             revision;
+       u8              display_id[3];
+       unsigned        has_bc:1;
+       unsigned        has_cabc:1;
+       unsigned        cabc_mode;
+       unsigned long   hw_guard_end;           /* next value of jiffies
+                                                  when we can issue the
+                                                  next sleep in/out command */
+       unsigned long   hw_guard_wait;          /* max guard time in jiffies */
+
+       struct spi_device       *spi;
+       struct mutex            mutex;
+
+       struct omap_dss_device  *dssdev;
+       struct backlight_device *bl_dev;
+};
+
+static struct acx565akm_device acx_dev;
+static int acx565akm_bl_update_status(struct backlight_device *dev);
+
+/*--------------------MIPID interface-----------------------------*/
+
+static void acx565akm_transfer(struct acx565akm_device *md, int cmd,
+                             const u8 *wbuf, int wlen, u8 *rbuf, int rlen)
+{
+       struct spi_message      m;
+       struct spi_transfer     *x, xfer[5];
+       int                     r;
+
+       BUG_ON(md->spi == NULL);
+
+       spi_message_init(&m);
+
+       memset(xfer, 0, sizeof(xfer));
+       x = &xfer[0];
+
+       cmd &=  0xff;
+       x->tx_buf = &cmd;
+       x->bits_per_word = 9;
+       x->len = 2;
+
+       if (rlen > 1 && wlen == 0) {
+               /*
+                * Between the command and the response data there is a
+                * dummy clock cycle. Add an extra bit after the command
+                * word to account for this.
+                */
+               x->bits_per_word = 10;
+               cmd <<= 1;
+       }
+       spi_message_add_tail(x, &m);
+
+       if (wlen) {
+               x++;
+               x->tx_buf = wbuf;
+               x->len = wlen;
+               x->bits_per_word = 9;
+               spi_message_add_tail(x, &m);
+       }
+
+       if (rlen) {
+               x++;
+               x->rx_buf       = rbuf;
+               x->len          = rlen;
+               spi_message_add_tail(x, &m);
+       }
+
+       r = spi_sync(md->spi, &m);
+       if (r < 0)
+               dev_dbg(&md->spi->dev, "spi_sync %d\n", r);
+}
+
+static inline void acx565akm_cmd(struct acx565akm_device *md, int cmd)
+{
+       acx565akm_transfer(md, cmd, NULL, 0, NULL, 0);
+}
+
+static inline void acx565akm_write(struct acx565akm_device *md,
+                              int reg, const u8 *buf, int len)
+{
+       acx565akm_transfer(md, reg, buf, len, NULL, 0);
+}
+
+static inline void acx565akm_read(struct acx565akm_device *md,
+                             int reg, u8 *buf, int len)
+{
+       acx565akm_transfer(md, reg, NULL, 0, buf, len);
+}
+
+static void hw_guard_start(struct acx565akm_device *md, int guard_msec)
+{
+       md->hw_guard_wait = msecs_to_jiffies(guard_msec);
+       md->hw_guard_end = jiffies + md->hw_guard_wait;
+}
+
+static void hw_guard_wait(struct acx565akm_device *md)
+{
+       unsigned long wait = md->hw_guard_end - jiffies;
+
+       if ((long)wait > 0 && wait <= md->hw_guard_wait) {
+               set_current_state(TASK_UNINTERRUPTIBLE);
+               schedule_timeout(wait);
+       }
+}
+
+/*----------------------MIPID wrappers----------------------------*/
+
+static void set_sleep_mode(struct acx565akm_device *md, int on)
+{
+       int cmd;
+
+       if (on)
+               cmd = MIPID_CMD_SLEEP_IN;
+       else
+               cmd = MIPID_CMD_SLEEP_OUT;
+       /*
+        * We have to keep 120msec between sleep in/out commands.
+        * (8.2.15, 8.2.16).
+        */
+       hw_guard_wait(md);
+       acx565akm_cmd(md, cmd);
+       hw_guard_start(md, 120);
+}
+
+static void set_display_state(struct acx565akm_device *md, int enabled)
+{
+       int cmd = enabled ? MIPID_CMD_DISP_ON : MIPID_CMD_DISP_OFF;
+
+       acx565akm_cmd(md, cmd);
+}
+
+static int panel_enabled(struct acx565akm_device *md)
+{
+       u32 disp_status;
+       int enabled;
+
+       acx565akm_read(md, MIPID_CMD_READ_DISP_STATUS, (u8 *)&disp_status, 4);
+       disp_status = __be32_to_cpu(disp_status);
+       enabled = (disp_status & (1 << 17)) && (disp_status & (1 << 10));
+       dev_dbg(&md->spi->dev,
+               "LCD panel %senabled by bootloader (status 0x%04x)\n",
+               enabled ? "" : "not ", disp_status);
+       return enabled;
+}
+
+static int panel_detect(struct acx565akm_device *md)
+{
+       acx565akm_read(md, MIPID_CMD_READ_DISP_ID, md->display_id, 3);
+       dev_dbg(&md->spi->dev, "MIPI display ID: %02x%02x%02x\n",
+               md->display_id[0], md->display_id[1], md->display_id[2]);
+
+       switch (md->display_id[0]) {
+       case 0x10:
+               md->model = MIPID_VER_ACX565AKM;
+               md->name = "acx565akm";
+               md->has_bc = 1;
+               md->has_cabc = 1;
+               break;
+       case 0x29:
+               md->model = MIPID_VER_L4F00311;
+               md->name = "l4f00311";
+               break;
+       case 0x45:
+               md->model = MIPID_VER_LPH8923;
+               md->name = "lph8923";
+               break;
+       case 0x83:
+               md->model = MIPID_VER_LS041Y3;
+               md->name = "ls041y3";
+               break;
+       default:
+               md->name = "unknown";
+               dev_err(&md->spi->dev, "invalid display ID\n");
+               return -ENODEV;
+       }
+
+       md->revision = md->display_id[1];
+
+       dev_info(&md->spi->dev, "omapfb: %s rev %02x LCD detected\n",
+                       md->name, md->revision);
+
+       return 0;
+}
+
+/*----------------------Backlight Control-------------------------*/
+
+static void enable_backlight_ctrl(struct acx565akm_device *md, int enable)
+{
+       u16 ctrl;
+
+       acx565akm_read(md, MIPID_CMD_READ_CTRL_DISP, (u8 *)&ctrl, 1);
+       if (enable) {
+               ctrl |= CTRL_DISP_BRIGHTNESS_CTRL_ON |
+                       CTRL_DISP_BACKLIGHT_ON;
+       } else {
+               ctrl &= ~(CTRL_DISP_BRIGHTNESS_CTRL_ON |
+                         CTRL_DISP_BACKLIGHT_ON);
+       }
+
+       ctrl |= 1 << 8;
+       acx565akm_write(md, MIPID_CMD_WRITE_CTRL_DISP, (u8 *)&ctrl, 2);
+}
+
+static void set_cabc_mode(struct acx565akm_device *md, unsigned mode)
+{
+       u16 cabc_ctrl;
+
+       md->cabc_mode = mode;
+       if (!md->enabled)
+               return;
+       cabc_ctrl = 0;
+       acx565akm_read(md, MIPID_CMD_READ_CABC, (u8 *)&cabc_ctrl, 1);
+       cabc_ctrl &= ~3;
+       cabc_ctrl |= (1 << 8) | (mode & 3);
+       acx565akm_write(md, MIPID_CMD_WRITE_CABC, (u8 *)&cabc_ctrl, 2);
+}
+
+static unsigned get_cabc_mode(struct acx565akm_device *md)
+{
+       return md->cabc_mode;
+}
+
+static unsigned get_hw_cabc_mode(struct acx565akm_device *md)
+{
+       u8 cabc_ctrl;
+
+       acx565akm_read(md, MIPID_CMD_READ_CABC, &cabc_ctrl, 1);
+       return cabc_ctrl & 3;
+}
+
+static void acx565akm_set_brightness(struct acx565akm_device *md, int level)
+{
+       int bv;
+
+       bv = level | (1 << 8);
+       acx565akm_write(md, MIPID_CMD_WRITE_DISP_BRIGHTNESS, (u8 *)&bv, 2);
+
+       if (level)
+               enable_backlight_ctrl(md, 1);
+       else
+               enable_backlight_ctrl(md, 0);
+}
+
+static int acx565akm_get_actual_brightness(struct acx565akm_device *md)
+{
+       u8 bv;
+
+       acx565akm_read(md, MIPID_CMD_READ_DISP_BRIGHTNESS, &bv, 1);
+
+       return bv;
+}
+
+
+static int acx565akm_bl_update_status(struct backlight_device *dev)
+{
+       struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
+       int r;
+       int level;
+
+       dev_dbg(&md->spi->dev, "%s\n", __func__);
+
+       mutex_lock(&md->mutex);
+
+       if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+                       dev->props.power == FB_BLANK_UNBLANK)
+               level = dev->props.brightness;
+       else
+               level = 0;
+
+       r = 0;
+       if (md->has_bc)
+               acx565akm_set_brightness(md, level);
+       else if (md->dssdev->set_backlight)
+               r = md->dssdev->set_backlight(md->dssdev, level);
+       else
+               r = -ENODEV;
+
+       mutex_unlock(&md->mutex);
+
+       return r;
+}
+
+static int acx565akm_bl_get_intensity(struct backlight_device *dev)
+{
+       struct acx565akm_device *md = dev_get_drvdata(&dev->dev);
+
+       dev_dbg(&dev->dev, "%s\n", __func__);
+
+       if (!md->has_bc && md->dssdev->set_backlight == NULL)
+               return -ENODEV;
+
+       if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
+                       dev->props.power == FB_BLANK_UNBLANK) {
+               if (md->has_bc)
+                       return acx565akm_get_actual_brightness(md);
+               else
+                       return dev->props.brightness;
+       }
+
+       return 0;
+}
+
+static struct backlight_ops acx565akm_bl_ops = {
+       .get_brightness = acx565akm_bl_get_intensity,
+       .update_status  = acx565akm_bl_update_status,
+};
+
+/*--------------------Auto Brightness control via Sysfs---------------------*/
+
+static const char *cabc_modes[] = {
+       "off",          /* always used when CABC is not supported */
+       "ui",
+       "still-image",
+       "moving-image",
+};
+
+static ssize_t show_cabc_mode(struct device *dev,
+               struct device_attribute *attr,
+               char *buf)
+{
+       struct acx565akm_device *md = dev_get_drvdata(dev);
+       const char *mode_str;
+       int mode;
+       int len;
+
+       if (!md->has_cabc)
+               mode = 0;
+       else
+               mode = get_cabc_mode(md);
+       mode_str = "unknown";
+       if (mode >= 0 && mode < ARRAY_SIZE(cabc_modes))
+               mode_str = cabc_modes[mode];
+       len = snprintf(buf, PAGE_SIZE, "%s\n", mode_str);
+
+       return len < PAGE_SIZE - 1 ? len : PAGE_SIZE - 1;
+}
+
+static ssize_t store_cabc_mode(struct device *dev,
+               struct device_attribute *attr,
+               const char *buf, size_t count)
+{
+       struct acx565akm_device *md = dev_get_drvdata(dev);
+       int i;
+
+       for (i = 0; i < ARRAY_SIZE(cabc_modes); i++) {
+               const char *mode_str = cabc_modes[i];
+               int cmp_len = strlen(mode_str);
+
+               if (count > 0 && buf[count - 1] == '\n')
+                       count--;
+               if (count != cmp_len)
+                       continue;
+
+               if (strncmp(buf, mode_str, cmp_len) == 0)
+                       break;
+       }
+
+       if (i == ARRAY_SIZE(cabc_modes))
+               return -EINVAL;
+
+       if (!md->has_cabc && i != 0)
+               return -EINVAL;
+
+       mutex_lock(&md->mutex);
+       set_cabc_mode(md, i);
+       mutex_unlock(&md->mutex);
+
+       return count;
+}
+
+static ssize_t show_cabc_available_modes(struct device *dev,
+               struct device_attribute *attr,
+               char *buf)
+{
+       struct acx565akm_device *md = dev_get_drvdata(dev);
+       int len;
+       int i;
+
+       if (!md->has_cabc)
+               return snprintf(buf, PAGE_SIZE, "%s\n", cabc_modes[0]);
+
+       for (i = 0, len = 0;
+            len < PAGE_SIZE && i < ARRAY_SIZE(cabc_modes); i++)
+               len += snprintf(&buf[len], PAGE_SIZE - len, "%s%s%s",
+                       i ? " " : "", cabc_modes[i],
+                       i == ARRAY_SIZE(cabc_modes) - 1 ? "\n" : "");
+
+       return len < PAGE_SIZE ? len : PAGE_SIZE - 1;
+}
+
+static DEVICE_ATTR(cabc_mode, S_IRUGO | S_IWUSR,
+               show_cabc_mode, store_cabc_mode);
+static DEVICE_ATTR(cabc_available_modes, S_IRUGO,
+               show_cabc_available_modes, NULL);
+
+static struct attribute *bldev_attrs[] = {
+       &dev_attr_cabc_mode.attr,
+       &dev_attr_cabc_available_modes.attr,
+       NULL,
+};
+
+static struct attribute_group bldev_attr_group = {
+       .attrs = bldev_attrs,
+};
+
+/*---------------------------ACX Panel----------------------------*/
+
+static struct omap_video_timings acx_panel_timings = {
+       .x_res          = 800,
+       .y_res          = 480,
+       .pixel_clock    = 24000,
+       .hfp            = 28,
+       .hsw            = 4,
+       .hbp            = 24,
+       .vfp            = 3,
+       .vsw            = 3,
+       .vbp            = 4,
+};
+
+static int acx_panel_probe(struct omap_dss_device *dssdev)
+{
+       int r;
+       struct acx565akm_device *md = &acx_dev;
+       struct backlight_device *bldev;
+       int max_brightness, brightness;
+
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+       dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+                                       OMAP_DSS_LCD_IHS;
+       /* FIXME AC bias ? */
+       dssdev->panel.timings = acx_panel_timings;
+       dssdev->panel.recommended_bpp = 16;
+
+       if (dssdev->platform_enable)
+               dssdev->platform_enable(dssdev);
+       /*
+        * After reset we have to wait 5 msec before the first
+        * command can be sent.
+        */
+       msleep(5);
+
+       md->enabled = panel_enabled(md);
+
+       r = panel_detect(md);
+       if (r) {
+               dev_err(&dssdev->dev, "%s panel detect error\n", __func__);
+               if (!md->enabled && dssdev->platform_disable)
+                       dssdev->platform_disable(dssdev);
+               return r;
+       }
+
+       mutex_lock(&acx_dev.mutex);
+       acx_dev.dssdev = dssdev;
+       mutex_unlock(&acx_dev.mutex);
+
+       if (!md->enabled) {
+               if (dssdev->platform_disable)
+                       dssdev->platform_disable(dssdev);
+       }
+
+       /*------- Backlight control --------*/
+
+       bldev = backlight_device_register("acx565akm", &md->spi->dev,
+                       md, &acx565akm_bl_ops);
+       md->bl_dev = bldev;
+       if (md->has_cabc) {
+               r = sysfs_create_group(&bldev->dev.kobj, &bldev_attr_group);
+               if (r) {
+                       dev_err(&bldev->dev,
+                               "%s failed to create sysfs files\n", __func__);
+                       backlight_device_unregister(bldev);
+                       return r;
+               }
+               md->cabc_mode = get_hw_cabc_mode(md);
+       }
+
+       bldev->props.fb_blank = FB_BLANK_UNBLANK;
+       bldev->props.power = FB_BLANK_UNBLANK;
+
+       if (md->has_bc)
+               max_brightness = 255;
+       else
+               max_brightness = dssdev->max_backlight_level;
+
+       if (md->has_bc)
+               brightness = acx565akm_get_actual_brightness(md);
+       else if (dssdev->get_backlight)
+               brightness = dssdev->get_backlight(dssdev);
+       else
+               brightness = 0;
+
+       bldev->props.max_brightness = max_brightness;
+       bldev->props.brightness = brightness;
+
+       acx565akm_bl_update_status(bldev);
+       return 0;
+}
+
+static void acx_panel_remove(struct omap_dss_device *dssdev)
+{
+       struct acx565akm_device *md = &acx_dev;
+
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+       sysfs_remove_group(&md->bl_dev->dev.kobj, &bldev_attr_group);
+       backlight_device_unregister(md->bl_dev);
+       mutex_lock(&acx_dev.mutex);
+       acx_dev.dssdev = NULL;
+       mutex_unlock(&acx_dev.mutex);
+}
+
+static int acx_panel_power_on(struct omap_dss_device *dssdev)
+{
+       struct acx565akm_device *md = &acx_dev;
+       int r;
+
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+
+       mutex_lock(&md->mutex);
+
+       if (dssdev->platform_enable) {
+               r = dssdev->platform_enable(dssdev);
+               if (r)
+                       return r;
+       }
+
+       if (md->enabled) {
+               dev_dbg(&md->spi->dev, "panel already enabled\n");
+               mutex_unlock(&md->mutex);
+               return 0;
+       }
+
+       /*
+        * We have to meet all the following delay requirements:
+        * 1. tRW: reset pulse width 10usec (7.12.1)
+        * 2. tRT: reset cancel time 5msec (7.12.1)
+        * 3. Providing PCLK,HS,VS signals for 2 frames = ~50msec worst
+        *    case (7.6.2)
+        * 4. 120msec before the sleep out command (7.12.1)
+        */
+       msleep(120);
+
+       set_sleep_mode(md, 0);
+       md->enabled = 1;
+
+       /* 5msec between sleep out and the next command. (8.2.16) */
+       msleep(5);
+       set_display_state(md, 1);
+       set_cabc_mode(md, md->cabc_mode);
+
+       mutex_unlock(&md->mutex);
+
+       return acx565akm_bl_update_status(md->bl_dev);
+}
+
+static void acx_panel_power_off(struct omap_dss_device *dssdev)
+{
+       struct acx565akm_device *md = &acx_dev;
+
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+
+       mutex_lock(&md->mutex);
+
+       if (!md->enabled) {
+               mutex_unlock(&md->mutex);
+               return;
+       }
+       set_display_state(md, 0);
+       set_sleep_mode(md, 1);
+       md->enabled = 0;
+       /*
+        * We have to provide PCLK,HS,VS signals for 2 frames (worst case
+        * ~50msec) after sending the sleep in command and asserting the
+        * reset signal. We probably could assert the reset w/o the delay
+        * but we still delay to avoid possible artifacts. (7.6.1)
+        */
+       msleep(50);
+
+       if (dssdev->platform_disable)
+               dssdev->platform_disable(dssdev);
+
+       mutex_unlock(&md->mutex);
+}
+
+static int acx_panel_enable(struct omap_dss_device *dssdev)
+{
+       int r;
+
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+       r = acx_panel_power_on(dssdev);
+
+       if (r)
+               return r;
+
+       dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+       return 0;
+}
+
+static void acx_panel_disable(struct omap_dss_device *dssdev)
+{
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+       acx_panel_power_off(dssdev);
+       dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static int acx_panel_suspend(struct omap_dss_device *dssdev)
+{
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+       acx_panel_power_off(dssdev);
+       dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+       return 0;
+}
+
+static int acx_panel_resume(struct omap_dss_device *dssdev)
+{
+       int r;
+
+       dev_dbg(&dssdev->dev, "%s\n", __func__);
+       r = acx_panel_power_on(dssdev);
+       if (r)
+               return r;
+
+       dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+       return 0;
+}
+
+static struct omap_dss_driver acx_panel_driver = {
+       .probe          = acx_panel_probe,
+       .remove         = acx_panel_remove,
+
+       .enable         = acx_panel_enable,
+       .disable        = acx_panel_disable,
+       .suspend        = acx_panel_suspend,
+       .resume         = acx_panel_resume,
+
+       .driver         = {
+               .name   = "panel-acx565akm",
+               .owner  = THIS_MODULE,
+       },
+};
+
+/*--------------------SPI probe-------------------------*/
+
+static int acx565akm_spi_probe(struct spi_device *spi)
+{
+       struct acx565akm_device *md = &acx_dev;
+
+       dev_dbg(&spi->dev, "%s\n", __func__);
+
+       spi->mode = SPI_MODE_3;
+       md->spi = spi;
+       mutex_init(&md->mutex);
+       dev_set_drvdata(&spi->dev, md);
+
+       omap_dss_register_driver(&acx_panel_driver);
+
+       return 0;
+}
+
+static int acx565akm_spi_remove(struct spi_device *spi)
+{
+       struct acx565akm_device *md = dev_get_drvdata(&spi->dev);
+
+       dev_dbg(&md->spi->dev, "%s\n", __func__);
+       omap_dss_unregister_driver(&acx_panel_driver);
+
+       return 0;
+}
+
+static struct spi_driver acx565akm_spi_driver = {
+       .driver = {
+               .name   = "acx565akm",
+               .bus    = &spi_bus_type,
+               .owner  = THIS_MODULE,
+       },
+       .probe  = acx565akm_spi_probe,
+       .remove = __devexit_p(acx565akm_spi_remove),
+};
+
+static int __init acx565akm_init(void)
+{
+       return spi_register_driver(&acx565akm_spi_driver);
+}
+
+static void __exit acx565akm_exit(void)
+{
+       spi_unregister_driver(&acx565akm_spi_driver);
+}
+
+module_init(acx565akm_init);
+module_exit(acx565akm_exit);
+
+MODULE_AUTHOR("Nokia Corporation");
+MODULE_DESCRIPTION("acx565akm LCD Driver");
+MODULE_LICENSE("GPL");
-- 
1.6.0.4