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path: root/ANDROID_3.4.5/drivers/video/backlight/l4f00242t03.c
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Diffstat (limited to 'ANDROID_3.4.5/drivers/video/backlight/l4f00242t03.c')
-rw-r--r--ANDROID_3.4.5/drivers/video/backlight/l4f00242t03.c281
1 files changed, 0 insertions, 281 deletions
diff --git a/ANDROID_3.4.5/drivers/video/backlight/l4f00242t03.c b/ANDROID_3.4.5/drivers/video/backlight/l4f00242t03.c
deleted file mode 100644
index 6022b672..00000000
--- a/ANDROID_3.4.5/drivers/video/backlight/l4f00242t03.c
+++ /dev/null
@@ -1,281 +0,0 @@
-/*
- * l4f00242t03.c -- support for Epson L4F00242T03 LCD
- *
- * Copyright 2007-2009 Freescale Semiconductor, Inc. All Rights Reserved.
- *
- * Copyright (c) 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
- * Inspired by Marek Vasut work in l4f00242t03.c
- *
- * 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.
- */
-
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/delay.h>
-#include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/lcd.h>
-#include <linux/slab.h>
-#include <linux/regulator/consumer.h>
-
-#include <linux/spi/spi.h>
-#include <linux/spi/l4f00242t03.h>
-
-struct l4f00242t03_priv {
- struct spi_device *spi;
- struct lcd_device *ld;
- int lcd_state;
- struct regulator *io_reg;
- struct regulator *core_reg;
-};
-
-
-static void l4f00242t03_reset(unsigned int gpio)
-{
- pr_debug("l4f00242t03_reset.\n");
- gpio_set_value(gpio, 1);
- mdelay(100);
- gpio_set_value(gpio, 0);
- mdelay(10); /* tRES >= 100us */
- gpio_set_value(gpio, 1);
- mdelay(20);
-}
-
-#define param(x) ((x) | 0x100)
-
-static void l4f00242t03_lcd_init(struct spi_device *spi)
-{
- struct l4f00242t03_pdata *pdata = spi->dev.platform_data;
- struct l4f00242t03_priv *priv = dev_get_drvdata(&spi->dev);
- const u16 cmd[] = { 0x36, param(0), 0x3A, param(0x60) };
-
- dev_dbg(&spi->dev, "initializing LCD\n");
-
- regulator_set_voltage(priv->io_reg, 1800000, 1800000);
- regulator_enable(priv->io_reg);
-
- regulator_set_voltage(priv->core_reg, 2800000, 2800000);
- regulator_enable(priv->core_reg);
-
- l4f00242t03_reset(pdata->reset_gpio);
-
- gpio_set_value(pdata->data_enable_gpio, 1);
- msleep(60);
- spi_write(spi, (const u8 *)cmd, ARRAY_SIZE(cmd) * sizeof(u16));
-}
-
-static void l4f00242t03_lcd_powerdown(struct spi_device *spi)
-{
- struct l4f00242t03_pdata *pdata = spi->dev.platform_data;
- struct l4f00242t03_priv *priv = dev_get_drvdata(&spi->dev);
-
- dev_dbg(&spi->dev, "Powering down LCD\n");
-
- gpio_set_value(pdata->data_enable_gpio, 0);
-
- regulator_disable(priv->io_reg);
- regulator_disable(priv->core_reg);
-}
-
-static int l4f00242t03_lcd_power_get(struct lcd_device *ld)
-{
- struct l4f00242t03_priv *priv = lcd_get_data(ld);
-
- return priv->lcd_state;
-}
-
-static int l4f00242t03_lcd_power_set(struct lcd_device *ld, int power)
-{
- struct l4f00242t03_priv *priv = lcd_get_data(ld);
- struct spi_device *spi = priv->spi;
-
- const u16 slpout = 0x11;
- const u16 dison = 0x29;
-
- const u16 slpin = 0x10;
- const u16 disoff = 0x28;
-
- if (power <= FB_BLANK_NORMAL) {
- if (priv->lcd_state <= FB_BLANK_NORMAL) {
- /* Do nothing, the LCD is running */
- } else if (priv->lcd_state < FB_BLANK_POWERDOWN) {
- dev_dbg(&spi->dev, "Resuming LCD\n");
-
- spi_write(spi, (const u8 *)&slpout, sizeof(u16));
- msleep(60);
- spi_write(spi, (const u8 *)&dison, sizeof(u16));
- } else {
- /* priv->lcd_state == FB_BLANK_POWERDOWN */
- l4f00242t03_lcd_init(spi);
- priv->lcd_state = FB_BLANK_VSYNC_SUSPEND;
- l4f00242t03_lcd_power_set(priv->ld, power);
- }
- } else if (power < FB_BLANK_POWERDOWN) {
- if (priv->lcd_state <= FB_BLANK_NORMAL) {
- /* Send the display in standby */
- dev_dbg(&spi->dev, "Standby the LCD\n");
-
- spi_write(spi, (const u8 *)&disoff, sizeof(u16));
- msleep(60);
- spi_write(spi, (const u8 *)&slpin, sizeof(u16));
- } else if (priv->lcd_state < FB_BLANK_POWERDOWN) {
- /* Do nothing, the LCD is already in standby */
- } else {
- /* priv->lcd_state == FB_BLANK_POWERDOWN */
- l4f00242t03_lcd_init(spi);
- priv->lcd_state = FB_BLANK_UNBLANK;
- l4f00242t03_lcd_power_set(ld, power);
- }
- } else {
- /* power == FB_BLANK_POWERDOWN */
- if (priv->lcd_state != FB_BLANK_POWERDOWN) {
- /* Clear the screen before shutting down */
- spi_write(spi, (const u8 *)&disoff, sizeof(u16));
- msleep(60);
- l4f00242t03_lcd_powerdown(spi);
- }
- }
-
- priv->lcd_state = power;
-
- return 0;
-}
-
-static struct lcd_ops l4f_ops = {
- .set_power = l4f00242t03_lcd_power_set,
- .get_power = l4f00242t03_lcd_power_get,
-};
-
-static int __devinit l4f00242t03_probe(struct spi_device *spi)
-{
- struct l4f00242t03_priv *priv;
- struct l4f00242t03_pdata *pdata = spi->dev.platform_data;
- int ret;
-
- if (pdata == NULL) {
- dev_err(&spi->dev, "Uninitialized platform data.\n");
- return -EINVAL;
- }
-
- priv = kzalloc(sizeof(struct l4f00242t03_priv), GFP_KERNEL);
-
- if (priv == NULL) {
- dev_err(&spi->dev, "No memory for this device.\n");
- return -ENOMEM;
- }
-
- dev_set_drvdata(&spi->dev, priv);
- spi->bits_per_word = 9;
- spi_setup(spi);
-
- priv->spi = spi;
-
- ret = gpio_request_one(pdata->reset_gpio, GPIOF_OUT_INIT_HIGH,
- "lcd l4f00242t03 reset");
- if (ret) {
- dev_err(&spi->dev,
- "Unable to get the lcd l4f00242t03 reset gpio.\n");
- goto err;
- }
-
- ret = gpio_request_one(pdata->data_enable_gpio, GPIOF_OUT_INIT_LOW,
- "lcd l4f00242t03 data enable");
- if (ret) {
- dev_err(&spi->dev,
- "Unable to get the lcd l4f00242t03 data en gpio.\n");
- goto err2;
- }
-
- priv->io_reg = regulator_get(&spi->dev, "vdd");
- if (IS_ERR(priv->io_reg)) {
- ret = PTR_ERR(priv->io_reg);
- dev_err(&spi->dev, "%s: Unable to get the IO regulator\n",
- __func__);
- goto err3;
- }
-
- priv->core_reg = regulator_get(&spi->dev, "vcore");
- if (IS_ERR(priv->core_reg)) {
- ret = PTR_ERR(priv->core_reg);
- dev_err(&spi->dev, "%s: Unable to get the core regulator\n",
- __func__);
- goto err4;
- }
-
- priv->ld = lcd_device_register("l4f00242t03",
- &spi->dev, priv, &l4f_ops);
- if (IS_ERR(priv->ld)) {
- ret = PTR_ERR(priv->ld);
- goto err5;
- }
-
- /* Init the LCD */
- l4f00242t03_lcd_init(spi);
- priv->lcd_state = FB_BLANK_VSYNC_SUSPEND;
- l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_UNBLANK);
-
- dev_info(&spi->dev, "Epson l4f00242t03 lcd probed.\n");
-
- return 0;
-
-err5:
- regulator_put(priv->core_reg);
-err4:
- regulator_put(priv->io_reg);
-err3:
- gpio_free(pdata->data_enable_gpio);
-err2:
- gpio_free(pdata->reset_gpio);
-err:
- kfree(priv);
-
- return ret;
-}
-
-static int __devexit l4f00242t03_remove(struct spi_device *spi)
-{
- struct l4f00242t03_priv *priv = dev_get_drvdata(&spi->dev);
- struct l4f00242t03_pdata *pdata = priv->spi->dev.platform_data;
-
- l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN);
- lcd_device_unregister(priv->ld);
-
- dev_set_drvdata(&spi->dev, NULL);
-
- gpio_free(pdata->data_enable_gpio);
- gpio_free(pdata->reset_gpio);
-
- regulator_put(priv->io_reg);
- regulator_put(priv->core_reg);
-
- kfree(priv);
-
- return 0;
-}
-
-static void l4f00242t03_shutdown(struct spi_device *spi)
-{
- struct l4f00242t03_priv *priv = dev_get_drvdata(&spi->dev);
-
- if (priv)
- l4f00242t03_lcd_power_set(priv->ld, FB_BLANK_POWERDOWN);
-
-}
-
-static struct spi_driver l4f00242t03_driver = {
- .driver = {
- .name = "l4f00242t03",
- .owner = THIS_MODULE,
- },
- .probe = l4f00242t03_probe,
- .remove = __devexit_p(l4f00242t03_remove),
- .shutdown = l4f00242t03_shutdown,
-};
-
-module_spi_driver(l4f00242t03_driver);
-
-MODULE_AUTHOR("Alberto Panizzo <maramaopercheseimorto@gmail.com>");
-MODULE_DESCRIPTION("EPSON L4F00242T03 LCD");
-MODULE_LICENSE("GPL v2");