From 1aa7e23e2ba41c94d61bcd9199afb23817400f3c Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Mon, 2 Apr 2012 13:18:44 +0000 Subject: i2c: Add TPS6586X driver This power management chip supports battery charging and a large number of power supplies. This initial driver only provides the ability to adjust the two synchronous buck converters SM0 and SM1 in a stepwise manner. Signed-off-by: Simon Glass Signed-off-by: Tom Warren --- include/tps6586x.h | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 include/tps6586x.h (limited to 'include/tps6586x.h') diff --git a/include/tps6586x.h b/include/tps6586x.h new file mode 100644 index 0000000000..ab880823a3 --- /dev/null +++ b/include/tps6586x.h @@ -0,0 +1,68 @@ +/* + * (C) Copyright 2010,2011 + * NVIDIA Corporation + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * 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 __H_ +#define _TPS6586X_H_ + +enum { + /* SM0-2 PWM/PFM Mode Selection */ + TPS6586X_PWM_SM0 = 1 << 0, + TPS6586X_PWM_SM1 = 1 << 1, + TPS6586X_PWM_SM2 = 1 << 2, +}; + +/** + * Enable PWM mode for selected SM0-2 + * + * @param mask Mask of synchronous converter to enable (TPS6586X_PWM_...) + * @return 0 if ok, -1 on error + */ +int tps6586x_set_pwm_mode(int mask); + +/** + * Adjust SM0 and SM1 voltages to the given targets in incremental steps. + * + * @param sm0_target Target voltage for SM0 in 25mW units, 0=725mV, 31=1.5V + * @param sm1_target Target voltage for SM1 in 25mW units, 0=725mV, 31=1.5V + * @param step Amount to change voltage in each step, in 25mW units + * @param rate Slew ratein mV/us: 0=instantly, 1=0.11, 2=0.22, + * 3=0.44, 4=0.88, 5=1.76, 6=3.52, 7=7.04 + * @param min_sm0_over_sm1 Minimum amount by which sm0 must exceed sm1. + * If this condition is not met, no adjustment will be + * done and an error will be reported. Use -1 to skip + * this check. + * @return 0 if ok, -1 on error + */ +int tps6586x_adjust_sm0_sm1(int sm0_target, int sm1_target, int step, int rate, + int min_sm0_over_sm1); + +/** + * Set up the TPS6586X I2C bus number. This will be used for all operations + * on the device. This function must be called before using other functions. + * + * @param bus I2C bus number containing the TPS6586X chip + * @return 0 (always succeeds) + */ +int tps6586x_init(int bus); + +#endif /* _TPS6586X_H_ */ -- cgit v1.2.3