leds: Add new LED driver for lm355x chips

This driver is a general version for LM355x,lm3554 and lm3556,led chips of TI.

LM3554 :
The LM3554 is a 2 MHz fixed-frequency synchronous boost
converter with 1.2A dual high side led drivers.
Datasheet: www.ti.com/lit/ds/symlink/lm3554.pdf

LM3556 :
The LM3556 is a 4 MHz fixed-frequency synchronous boost
converter plus 1.5A constant current driver for a high-current white LED.
Datasheet: www.national.com/ds/LM/LM3556.pdf

(bryan.wu@canonical.com: use flush_work() to replace flush_work_sync() which is
deprecated)

Signed-off-by: G.Shark Jeong <gshark.jeong@gmail.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>

drivers/leds/Kconfig

@@ -423,13 +423,13 @@ config LEDS_MAX8997
 	  This option enables support for on-chip LED drivers on
 	  MAXIM MAX8997 PMIC.
 
-config LEDS_LM3556
-	tristate "LED support for LM3556 Chip"
+config LEDS_LM355x
+	tristate "LED support for LM355x Chips, LM3554 and LM3556"
 	depends on LEDS_CLASS && I2C
 	select REGMAP_I2C
 	help
-	  This option enables support for LEDs connected to LM3556.
-	  LM3556 includes Torch, Flash and Indicator functions.
+	  This option enables support for LEDs connected to LM355x.
+	  LM355x includes Torch, Flash and Indicator functions.
 
 config LEDS_OT200
 	tristate "LED support for the Bachmann OT200"

drivers/leds/Makefile

@@ -48,7 +48,7 @@ obj-$(CONFIG_LEDS_NETXBIG)		+= leds-netxbig.o
 obj-$(CONFIG_LEDS_ASIC3)		+= leds-asic3.o
 obj-$(CONFIG_LEDS_RENESAS_TPU)		+= leds-renesas-tpu.o
 obj-$(CONFIG_LEDS_MAX8997)		+= leds-max8997.o
-obj-$(CONFIG_LEDS_LM3556)		+= leds-lm3556.o
+obj-$(CONFIG_LEDS_LM355x)		+= leds-lm355x.o
 obj-$(CONFIG_LEDS_BLINKM)		+= leds-blinkm.o
 
 # LED SPI Drivers

include/linux/platform_data/leds-lm3556.h

-/*
- * Simple driver for Texas Instruments LM3556 LED Flash driver chip (Rev0x03)
- * Copyright (C) 2012 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 __LINUX_LM3556_H
-#define __LINUX_LM3556_H
-
-#define LM3556_NAME "leds-lm3556"
-
-enum lm3556_pin_polarity {
-	PIN_LOW_ACTIVE = 0,
-	PIN_HIGH_ACTIVE,
-};
-
-enum lm3556_pin_enable {
-	PIN_DISABLED = 0,
-	PIN_ENABLED,
-};
-
-enum lm3556_strobe_usuage {
-	STROBE_EDGE_DETECT = 0,
-	STROBE_LEVEL_DETECT,
-};
-
-enum lm3556_indic_mode {
-	INDIC_MODE_INTERNAL = 0,
-	INDIC_MODE_EXTERNAL,
-};
-
-struct lm3556_platform_data {
-	enum lm3556_pin_enable torch_pin_en;
-	enum lm3556_pin_polarity torch_pin_polarity;
-
-	enum lm3556_strobe_usuage strobe_usuage;
-	enum lm3556_pin_enable strobe_pin_en;
-	enum lm3556_pin_polarity strobe_pin_polarity;
-
-	enum lm3556_pin_enable tx_pin_en;
-	enum lm3556_pin_polarity tx_pin_polarity;
-
-	enum lm3556_indic_mode indicator_mode;
-};
-
-#endif /* __LINUX_LM3556_H */

include/linux/platform_data/leds-lm355x.h

+/*
+ * Copyright (C) 2012 Texas Instruments
+ *
+ * License Terms: GNU General Public License v2
+ *
+ * Simple driver for Texas Instruments LM355x LED driver chip
+ *
+ * Author: G.Shark Jeong <gshark.jeong@gmail.com>
+ *         Daniel Jeong <daniel.jeong@ti.com>
+ */
+
+#define LM355x_NAME "leds-lm355x"
+#define LM3554_NAME "leds-lm3554"
+#define LM3556_NAME "leds-lm3556"
+
+/* lm3554 : strobe def. on */
+enum lm355x_strobe {
+	LM355x_PIN_STROBE_DISABLE = 0x00,
+	LM355x_PIN_STROBE_ENABLE = 0x01,
+};
+
+enum lm355x_torch {
+	LM355x_PIN_TORCH_DISABLE = 0,
+	LM3554_PIN_TORCH_ENABLE = 0x80,
+	LM3556_PIN_TORCH_ENABLE = 0x10,
+};
+
+enum lm355x_tx2 {
+	LM355x_PIN_TX_DISABLE = 0,
+	LM3554_PIN_TX_ENABLE = 0x20,
+	LM3556_PIN_TX_ENABLE = 0x40,
+};
+
+enum lm355x_ntc {
+	LM355x_PIN_NTC_DISABLE = 0,
+	LM3554_PIN_NTC_ENABLE = 0x08,
+	LM3556_PIN_NTC_ENABLE = 0x80,
+};
+
+enum lm355x_pmode {
+	LM355x_PMODE_DISABLE = 0,
+	LM355x_PMODE_ENABLE = 0x04,
+};
+
+/*
+ * struct lm3554_platform_data
+ * @pin_strobe: strobe input
+ * @pin_torch : input pin
+ *              lm3554-tx1/torch/gpio1
+ *              lm3556-torch
+ * @pin_tx2   : input pin
+ *              lm3554-envm/tx2/gpio2
+ *              lm3556-tx pin
+ * @ntc_pin  : output pin
+ *              lm3554-ledi/ntc
+ *              lm3556-temp pin
+ * @pass_mode : pass mode
+ */
+struct lm355x_platform_data {
+	enum lm355x_strobe pin_strobe;
+	enum lm355x_torch pin_tx1;
+	enum lm355x_tx2 pin_tx2;
+	enum lm355x_ntc ntc_pin;
+
+	enum lm355x_pmode pass_mode;
+};