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Message-ID: <B567DBAB974C0544994013492B949F8E3812D6EB8C@EXMAIL03.scwf.nsc.com>
Date: Fri, 27 Jan 2012 00:50:23 -0800
From: "Kim, Milo" <Milo.Kim@...com>
To: "Andrew Morton" <akpm@...ux-foundation.org>
cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"Richard Purdie" <rpurdie@...ys.net>,
"Kim, Milo" <Milo.Kim@....com>
Subject: [PATCH v3 2/3] backlight: new backlight driver for LP855x
devices
Header file is created.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@...com>
---
include/linux/lp855x.h | 133 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 133 insertions(+), 0 deletions(-)
create mode 100644 include/linux/lp855x.h
diff --git a/include/linux/lp855x.h b/include/linux/lp855x.h
new file mode 100644
index 0000000..4b124c1
--- /dev/null
+++ b/include/linux/lp855x.h
@@ -0,0 +1,133 @@
+/*
+ * LP855x Backlight Driver
+ *
+ * Copyright (C) 2011 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.
+ *
+ */
+
+#ifndef _LP855X_H
+#define _LP855X_H
+
+#define BL_CTL_SHFT (0)
+#define BRT_MODE_SHFT (1)
+#define BRT_MODE_MASK (0x06)
+
+/* Enable backlight. Only valid when BRT_MODE=10(I2C only) */
+#define ENABLE_BL (1)
+#define DISABLE_BL (0)
+
+#define I2C_CONFIG(id) id ## _I2C_CONFIG
+#define PWM_CONFIG(id) id ## _PWM_CONFIG
+
+/* DEVICE CONTROL register - LP8550 */
+#define LP8550_PWM_CONFIG (LP8550_PWM_ONLY << BRT_MODE_SHFT)
+#define LP8550_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \
+ (LP8550_I2C_ONLY << BRT_MODE_SHFT))
+
+/* DEVICE CONTROL register - LP8551 */
+#define LP8551_PWM_CONFIG LP8550_PWM_CONFIG
+#define LP8551_I2C_CONFIG LP8550_I2C_CONFIG
+
+/* DEVICE CONTROL register - LP8552 */
+#define LP8552_PWM_CONFIG LP8550_PWM_CONFIG
+#define LP8552_I2C_CONFIG LP8550_I2C_CONFIG
+
+/* DEVICE CONTROL register - LP8553 */
+#define LP8553_PWM_CONFIG LP8550_PWM_CONFIG
+#define LP8553_I2C_CONFIG LP8550_I2C_CONFIG
+
+/* DEVICE CONTROL register - LP8556 */
+#define LP8556_PWM_CONFIG (LP8556_PWM_ONLY << BRT_MODE_SHFT)
+#define LP8556_COMB1_CONFIG (LP8556_COMBINED1 << BRT_MODE_SHFT)
+#define LP8556_I2C_CONFIG ((ENABLE_BL << BL_CTL_SHFT) | \
+ (LP8556_I2C_ONLY << BRT_MODE_SHFT))
+#define LP8556_COMB2_CONFIG (LP8556_COMBINED2 << BRT_MODE_SHFT)
+
+/* ROM area boundary */
+#define EEPROM_START (0xA0)
+#define EEPROM_END (0xA7)
+#define EPROM_START (0xA0)
+#define EPROM_END (0xAF)
+
+enum lp855x_chip_id {
+ LP8550,
+ LP8551,
+ LP8552,
+ LP8553,
+ LP8556,
+};
+
+enum lp855x_brightness_ctrl_mode {
+ PWM_BASED = 1,
+ REGISTER_BASED,
+};
+
+enum lp8550_brighntess_source {
+ LP8550_PWM_ONLY,
+ LP8550_I2C_ONLY = 2,
+};
+
+enum lp8551_brighntess_source {
+ LP8551_PWM_ONLY = LP8550_PWM_ONLY,
+ LP8551_I2C_ONLY = LP8550_I2C_ONLY,
+};
+
+enum lp8552_brighntess_source {
+ LP8552_PWM_ONLY = LP8550_PWM_ONLY,
+ LP8552_I2C_ONLY = LP8550_I2C_ONLY,
+};
+
+enum lp8553_brighntess_source {
+ LP8553_PWM_ONLY = LP8550_PWM_ONLY,
+ LP8553_I2C_ONLY = LP8550_I2C_ONLY,
+};
+
+enum lp8556_brightness_source {
+ LP8556_PWM_ONLY,
+ LP8556_COMBINED1, /* pwm + i2c before the shaper block */
+ LP8556_I2C_ONLY,
+ LP8556_COMBINED2, /* pwm + i2c after the shaper block */
+};
+
+struct lp855x_pwm_data {
+ void (*pwm_set_intensity) (int brightness, int max_brightness);
+ int (*pwm_get_intensity) (int max_brightness);
+};
+
+struct lp855x_rom_data {
+ u8 addr;
+ u8 val;
+};
+
+/**
+ * struct lp855x_platform_data
+ * @name : Backlight driver name. If it is not defined, default name is set.
+ * @mode : brightness control by pwm or lp855x register
+ * @device_control : value of DEVICE CONTROL register
+ * @initial_brightness : initial value of backlight brightness
+ * @max_brightness : maximum value of backlight brightness
+ * @pwm_data : platform specific pwm generation functions.
+ Only valid when mode is PWM_BASED.
+ * @load_new_rom_data :
+ 0 : use default configuration data
+ 1 : update values of eeprom or eprom registers on loading driver
+ * @size_program : total size of lp855x_rom_data
+ * @rom_data : list of new eeprom/eprom registers
+ */
+struct lp855x_platform_data {
+ char *name;
+ enum lp855x_brightness_ctrl_mode mode;
+ u8 device_control;
+ int initial_brightness;
+ int max_brightness;
+ struct lp855x_pwm_data pwm_data;
+ u8 load_new_rom_data;
+ int size_program;
+ struct lp855x_rom_data *rom_data;
+};
+
+#endif
--
1.7.4.1
Best Regards,
Milo (Woogyom) Kim
Texas Instruments Incorporated
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