diff options
author | Laxman Dewangan <ldewangan@nvidia.com> | 2012-11-19 06:58:29 +0530 |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-19 17:03:11 +0900 |
commit | 5928f5389664fffa295c39bbe23de73069124451 (patch) | |
tree | c6da1465977951e85eb6ecc9375fbd842e020b08 /include | |
parent | f4a75d2eb7b1e2206094b901be09adb31ba63681 (diff) | |
download | op-kernel-dev-5928f5389664fffa295c39bbe23de73069124451.zip op-kernel-dev-5928f5389664fffa295c39bbe23de73069124451.tar.gz |
regulator: max8973: add regulator driver support
The MAXIM MAX8973 high-efficiency, three phase, DC-DC step-down
switching regulator delievers up to 9A of output current. Each
phase operates at a 2MHz fixed frequency with a 120 deg shift
from the adjacent phase, allowing the use of small magnetic
component.
Add regulator driver for this device.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/linux/regulator/max8973-regulator.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/include/linux/regulator/max8973-regulator.h b/include/linux/regulator/max8973-regulator.h new file mode 100644 index 0000000..f8acc05 --- /dev/null +++ b/include/linux/regulator/max8973-regulator.h @@ -0,0 +1,72 @@ +/* + * max8973-regulator.h -- MAXIM 8973 regulator + * + * Interface for regulator driver for MAXIM 8973 DC-DC step-down + * switching regulator. + * + * Copyright (C) 2012 NVIDIA Corporation + + * Author: Laxman Dewangan <ldewangan@nvidia.com> + * + * 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., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + */ + +#ifndef __LINUX_REGULATOR_MAX8973_H +#define __LINUX_REGULATOR_MAX8973_H + +/* + * Control flags for configuration of the device. + * Client need to pass this information with ORed + */ +#define MAX8973_CONTROL_REMOTE_SENSE_ENABLE 0x00000001 +#define MAX8973_CONTROL_FALLING_SLEW_RATE_ENABLE 0x00000002 +#define MAX8973_CONTROL_OUTPUT_ACTIVE_DISCH_ENABLE 0x00000004 +#define MAX8973_CONTROL_BIAS_ENABLE 0x00000008 +#define MAX8973_CONTROL_PULL_DOWN_ENABLE 0x00000010 +#define MAX8973_CONTROL_FREQ_SHIFT_9PER_ENABLE 0x00000020 + +#define MAX8973_CONTROL_CLKADV_TRIP_DISABLED 0x00000000 +#define MAX8973_CONTROL_CLKADV_TRIP_75mV_PER_US 0x00010000 +#define MAX8973_CONTROL_CLKADV_TRIP_150mV_PER_US 0x00020000 +#define MAX8973_CONTROL_CLKADV_TRIP_75mV_PER_US_HIST_DIS 0x00030000 + +#define MAX8973_CONTROL_INDUCTOR_VALUE_NOMINAL 0x00000000 +#define MAX8973_CONTROL_INDUCTOR_VALUE_MINUS_30_PER 0x00100000 +#define MAX8973_CONTROL_INDUCTOR_VALUE_PLUS_30_PER 0x00200000 +#define MAX8973_CONTROL_INDUCTOR_VALUE_PLUS_60_PER 0x00300000 + +/* + * struct max8973_regulator_platform_data - max8973 regulator platform data. + * + * @reg_init_data: The regulator init data. + * @control_flags: Control flags which are ORed value of above flags to + * configure device. + * @enable_ext_control: Enable the voltage enable/disable through external + * control signal from EN input pin. If it is false then + * voltage output will be enabled/disabled through EN bit of + * device register. + * @dvs_gpio: GPIO for dvs. It should be -1 if this is tied with fixed logic. + * @dvs_def_state: Default state of dvs. 1 if it is high else 0. + */ +struct max8973_regulator_platform_data { + struct regulator_init_data *reg_init_data; + unsigned long control_flags; + bool enable_ext_control; + int dvs_gpio; + unsigned dvs_def_state:1; +}; + +#endif /* __LINUX_REGULATOR_MAX8973_H */ |