media: video: tegra: max77665 flash driver support

This flash is a sub-device of the maxim 77665a chip. It supports
dual led output, with the features of torch/flash modes, timer out,
and over-voltage protection, etc.

bug 1035551

(cherry picked from commit 3d3341d2c3a693a00aa9fc9f123d8d9b51129513)
Reviewed-on: http://git-master/r/139111

Change-Id: I299502c4f4fdce751d760d6796492f0e7342606e
Signed-off-by: Charlie Huang <chahuang@nvidia.com>
Reviewed-on: http://git-master/r/141859
Reviewed-by: Thomas Cherry <tcherry@nvidia.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/include/media/max77665-flash.h b/include/media/max77665-flash.h
new file mode 100644
index 000000000000..0913e2e589de
--- /dev/null
+++ b/include/media/max77665-flash.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2012 NVIDIA Corporation.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+
+#ifndef __MAX77665_H__
+#define __MAX77665_H__
+
+#include <media/nvc_torch.h>
+
+struct max77665_f_power_rail {
+	/* to enable the module power */
+	struct regulator *vbus;
+	/* to enable the host interface power */
+	struct regulator *vio;
+	/* to enable the power on i2c bus */
+	struct regulator *i2c;
+};
+
+struct max77665_f_config {
+	u32 led_mask;		/* led(s) enabled, 1/2/3 - left/right/both */
+	bool torch_on_flash_en; /* true=high level on the flash_en pin will
+				   turn on torch */
+	u16 flash_mode;		/* 1=one_shot_mode, flash is triggerred on the
+				   rising edge of FLASHEN/TORCHEN/I2C_bit, and
+				   terminated based on the flash safety timer
+				   value.
+				   0, 2=run for MAX timer, flash is triggerred
+				   on the rising edge of FLASHEN/TORCHEN/I2C,
+				   and terminated based on the falling edge of
+				   FLASHEN/TORCHEN/I2C_bit and flash safety
+				   timer value, whichever comes first.*/
+	u16 torch_mode;		/* 0, 1=torch safety timer disabled, torch is
+				   controlled solely by the FLASHEN/TORCHEN/I2C.
+				   2=one_shot_mode, torch is triggerred on the
+				   rising edge of FLASHEN/TORCHEN/I2C_bit, and
+				   terminated based on the torch safety timer
+				   setting.
+				   3=run for MAX timer, torch is triggerred on
+				   he rising edge of FLASHEN/TORCHEN/I2C_bit,
+				   and terminated based on the falling edge of
+				   FLASHEN/TORCHEN/ I2C_bit and torch safety
+				   timer setting, whichever comes first.*/
+	u16 adaptive_mode;	/* 1=fix mode, 2=adaptive mode
+				The BYP starts from BOOST_VOUT_FLASH value.
+				Then increment by 100mV steps until there is
+				full programmed current across the LED(s).
+				Fixed mode otherwise: the BYP stays at
+				BOOST_VOUT_FLASH value */
+	u16 boost_vout_flash_mV;	/* BOOST_VOUT_FLASH value */
+	/* LED configuration, two identical leds must be connected. */
+	u16 max_total_current_mA; /* Both leds' maximum peak current in mA */
+	u16 max_peak_current_mA; /* This led's maximum peak current in mA */
+	u16 max_torch_current_mA; /* This leds maximum torch current in mA */
+	u16 max_peak_duration_ms; /* the maximum duration max_peak_current_mA
+				     can be applied */
+	u16 max_flash_threshold_mV;  /* low battery detection threshold.
+					2400mV ~ 3400mV. */
+	u16 max_flash_hysteresis_mV; /* low battery detection hysteresis.
+					100mV ~ 300mV */
+	u16 max_flash_lbdly_f_uS; /* Low battery delay timer for falling edge
+					detection. Adjustable from 256uS to
+					2048uS in 256uS steps. */
+	u16 max_flash_lbdly_r_uS; /* Low battery delay timer for raising edge
+					detection. Adjustable from 256uS to
+					2048uS in 256uS steps. */
+};
+
+struct max77665_f_platform_data {
+	struct max77665_f_config config;
+	unsigned cfg; /* use the NVC_CFG_ defines */
+	unsigned num; /* see implementation notes in driver */
+	unsigned sync; /* see implementation notes in driver */
+	const char *dev_name; /* see implementation notes in driver */
+	struct nvc_torch_pin_state pinstate; /* see notes in driver */
+	unsigned gpio_strobe; /* GPIO connected to the ACT signal */
+
+	int (*power_get)(struct max77665_f_power_rail *pw);
+	int (*power_put)(struct max77665_f_power_rail *pw);
+	int (*poweron_callback)(struct max77665_f_power_rail *pw);
+	int (*poweroff_callback)(struct max77665_f_power_rail *pw);
+};
+
+#endif
+/* __MAX77665_H__ */